* [PATCH v3 00/19] LoongArch initial support
@ 2026-08-21 8:42 Yao Zi
2026-08-21 8:42 ` [PATCH v3 01/19] lib: fdtdec: Handle multiple memory nodes Yao Zi
` (18 more replies)
0 siblings, 19 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
Hi all,
So far this series has implemented general support for initializing CPU,
exceptions, kernel booting, CPU and timer drivers, QEMU LoongArch virt
machine support and UEFI standard compliant EFI booting support.
LoongArch had defined 3 ISA variants, LA64, LA32 and LA32R (Reduced,
intended for MCUs and education purpose). This is a little-endian only
architecture. Only LA64 is implemented in this series since the hardware
is more widely available, and I'll work on 32bit support later.
This series had passed checkpatch with exceptions on some false alarms
and headers imported elsewhere. I've tested virtio devices, direct
kernel booting, efistub kernel booting, grub, and hello/selftests EFI
app.
LoongArch CI depends on some already-merged dockerfile[2] and buildman[3]
changes to run.
Toolchain can be found at [4] or using upstream one, to build
make qemu-loongarch64_defconfig
make
To run in QEMU:
qemu-system-loongarch64 -nographic -machine virt -bios u-boot.bin
TODOs on the architecture & board:
- loongson,ls7a-rtc driver
- The only device on QEMU board haven't been supported yet
- LoongArch sandbox host support
- TLB enablement
- This is required for real CPU to utilize caches
- Possibly EFI-APP support for real machine
Thanks for your time and review!
Link to v2: https://lore.kernel.org/u-boot/20260701111808.870705-1-me@ziyao.cc/
Link to v1: https://lore.kernel.org/u-boot/20240522-loongarch-v1-0-1407e0b69678@flygoat.com/
[1]: https://lore.kernel.org/u-boot/20240717-docker-image-v1-0-7c7fc6251e7a@flygoat.com/
[2]: https://lore.kernel.org/u-boot/20260731120750.2212394-1-me@ziyao.cc/
[3]: https://lore.kernel.org/u-boot/20260806122957.101125-1-me@ziyao.cc/
[4]: https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/14.2.0/x86_64-gcc-14.2.0-nolibc-loongarch64-linux.tar.gz
Jiaxun Yang (16):
lib: fdtdec: Handle multiple memory nodes
linux/io.h: Use map_physmem to implement ioremap
image: Take entry point as an output of setup_booti
elf: Define LoongArch bits
image: Define IH_ARCH_LOONGARCH
LoongArch: skeleton and headers
LoongArch: lib: General routines
LoongArch: CPU assembly routines
LoongArch: Exception handling
LoongArch: Boot Image bits
LoongArch: Generic platform type
cpu: Add loongarch_cpu driver
timer: Add loongarch_timer driver
board: emulation: Add qemu-loongarch
efi: LoongArch: Define LoongArch bits everywhere
efi: LoongArch: Implement everything
Yao Zi (3):
doc: arch: Add documentation for LoongArch
MAINTAINERS: Add entry for LoongArch
CI: Wire up qemu-loongarch64
.azure-pipelines.yml | 11 +-
.gitlab-ci.yml | 6 +
MAINTAINERS | 11 +
Makefile | 2 +
arch/Kconfig | 16 +
arch/arm/lib/image.c | 3 +-
arch/loongarch/Kconfig | 67 +
arch/loongarch/Makefile | 21 +
arch/loongarch/config.mk | 27 +
arch/loongarch/cpu/Makefile | 9 +
arch/loongarch/cpu/cpu.c | 17 +
arch/loongarch/cpu/generic/Kconfig | 13 +
arch/loongarch/cpu/generic/Makefile | 7 +
arch/loongarch/cpu/generic/cpu.c | 22 +
arch/loongarch/cpu/generic/dram.c | 16 +
arch/loongarch/cpu/genex.S | 21 +
arch/loongarch/cpu/smp_secondary.S | 55 +
arch/loongarch/cpu/start.S | 168 ++
arch/loongarch/cpu/u-boot.lds | 85 +
arch/loongarch/dts/Makefile | 6 +
arch/loongarch/dts/qemu-loongarch64.dts | 9 +
arch/loongarch/include/asm/acpi_table.h | 8 +
arch/loongarch/include/asm/addrspace.h | 86 +
.../include/asm/arch-generic/entry-init.h | 15 +
arch/loongarch/include/asm/asm.h | 186 +++
arch/loongarch/include/asm/atomic.h | 12 +
arch/loongarch/include/asm/barrier.h | 138 ++
arch/loongarch/include/asm/bitops.h | 156 ++
arch/loongarch/include/asm/byteorder.h | 22 +
arch/loongarch/include/asm/cache.h | 34 +
arch/loongarch/include/asm/config.h | 11 +
arch/loongarch/include/asm/cpu.h | 123 ++
arch/loongarch/include/asm/dma-mapping.h | 27 +
arch/loongarch/include/asm/global_data.h | 50 +
arch/loongarch/include/asm/gpio.h | 11 +
arch/loongarch/include/asm/io.h | 399 +++++
arch/loongarch/include/asm/linkage.h | 11 +
arch/loongarch/include/asm/loongarch.h | 1467 +++++++++++++++++
arch/loongarch/include/asm/posix_types.h | 87 +
arch/loongarch/include/asm/processor.h | 11 +
arch/loongarch/include/asm/ptrace.h | 33 +
arch/loongarch/include/asm/regdef.h | 42 +
arch/loongarch/include/asm/sections.h | 8 +
arch/loongarch/include/asm/setjmp.h | 20 +
arch/loongarch/include/asm/spl.h | 11 +
arch/loongarch/include/asm/stackframe.h | 175 ++
arch/loongarch/include/asm/string.h | 11 +
arch/loongarch/include/asm/system.h | 72 +
arch/loongarch/include/asm/types.h | 37 +
arch/loongarch/include/asm/u-boot-loongarch.h | 23 +
arch/loongarch/include/asm/u-boot.h | 30 +
arch/loongarch/include/asm/unaligned.h | 11 +
arch/loongarch/lib/Makefile | 26 +
arch/loongarch/lib/asm-offsets.c | 66 +
arch/loongarch/lib/boot.c | 14 +
arch/loongarch/lib/bootm.c | 130 ++
arch/loongarch/lib/cache.c | 243 +++
arch/loongarch/lib/crt0_loongarch_efi.S | 182 ++
arch/loongarch/lib/elf_loongarch_efi.lds | 76 +
arch/loongarch/lib/image.c | 77 +
arch/loongarch/lib/interrupts.c | 192 +++
arch/loongarch/lib/reloc_loongarch_efi.c | 102 ++
arch/loongarch/lib/reset.c | 14 +
arch/loongarch/lib/setjmp.S | 52 +
arch/riscv/lib/image.c | 4 +-
arch/sandbox/lib/bootm.c | 2 +-
board/emulation/qemu-loongarch/Kconfig | 68 +
board/emulation/qemu-loongarch/MAINTAINERS | 9 +
board/emulation/qemu-loongarch/Makefile | 6 +
.../emulation/qemu-loongarch/qemu-loongarch.c | 67 +
.../qemu-loongarch/qemu-loongarch.env | 5 +
boot/bootm.c | 5 +-
boot/image.c | 1 +
cmd/Kconfig | 2 +-
cmd/booti.c | 5 +-
common/spl/spl.c | 9 +-
configs/qemu-loongarch64_defconfig | 36 +
doc/arch/index.rst | 1 +
doc/arch/loongarch.rst | 30 +
doc/board/emulation/index.rst | 1 +
doc/board/emulation/qemu-loongarch.rst | 39 +
drivers/cpu/Kconfig | 6 +
drivers/cpu/Makefile | 1 +
drivers/cpu/loongarch_cpu.c | 142 ++
drivers/timer/Kconfig | 8 +
drivers/timer/Makefile | 1 +
drivers/timer/loongarch_timer.c | 132 ++
include/asm-generic/global_data.h | 2 +-
include/asm-generic/pe.h | 2 +
include/config_distro_bootcmd.h | 5 +
include/configs/qemu-loongarch.h | 17 +
include/elf.h | 8 +-
include/host_arch.h | 2 +
include/image.h | 8 +-
include/linux/io.h | 3 +-
include/pe.h | 2 +
lib/efi_loader/Kconfig | 2 +-
lib/efi_loader/efi_helper.c | 7 +
lib/efi_loader/efi_image_loader.c | 38 +
lib/efi_loader/efi_runtime.c | 4 +
.../efi_selftest_miniapp_exception.c | 3 +
lib/fdtdec.c | 127 +-
102 files changed, 5826 insertions(+), 77 deletions(-)
create mode 100644 arch/loongarch/Kconfig
create mode 100644 arch/loongarch/Makefile
create mode 100644 arch/loongarch/config.mk
create mode 100644 arch/loongarch/cpu/Makefile
create mode 100644 arch/loongarch/cpu/cpu.c
create mode 100644 arch/loongarch/cpu/generic/Kconfig
create mode 100644 arch/loongarch/cpu/generic/Makefile
create mode 100644 arch/loongarch/cpu/generic/cpu.c
create mode 100644 arch/loongarch/cpu/generic/dram.c
create mode 100644 arch/loongarch/cpu/genex.S
create mode 100644 arch/loongarch/cpu/smp_secondary.S
create mode 100644 arch/loongarch/cpu/start.S
create mode 100644 arch/loongarch/cpu/u-boot.lds
create mode 100644 arch/loongarch/dts/Makefile
create mode 100644 arch/loongarch/dts/qemu-loongarch64.dts
create mode 100644 arch/loongarch/include/asm/acpi_table.h
create mode 100644 arch/loongarch/include/asm/addrspace.h
create mode 100644 arch/loongarch/include/asm/arch-generic/entry-init.h
create mode 100644 arch/loongarch/include/asm/asm.h
create mode 100644 arch/loongarch/include/asm/atomic.h
create mode 100644 arch/loongarch/include/asm/barrier.h
create mode 100644 arch/loongarch/include/asm/bitops.h
create mode 100644 arch/loongarch/include/asm/byteorder.h
create mode 100644 arch/loongarch/include/asm/cache.h
create mode 100644 arch/loongarch/include/asm/config.h
create mode 100644 arch/loongarch/include/asm/cpu.h
create mode 100644 arch/loongarch/include/asm/dma-mapping.h
create mode 100644 arch/loongarch/include/asm/global_data.h
create mode 100644 arch/loongarch/include/asm/gpio.h
create mode 100644 arch/loongarch/include/asm/io.h
create mode 100644 arch/loongarch/include/asm/linkage.h
create mode 100644 arch/loongarch/include/asm/loongarch.h
create mode 100644 arch/loongarch/include/asm/posix_types.h
create mode 100644 arch/loongarch/include/asm/processor.h
create mode 100644 arch/loongarch/include/asm/ptrace.h
create mode 100644 arch/loongarch/include/asm/regdef.h
create mode 100644 arch/loongarch/include/asm/sections.h
create mode 100644 arch/loongarch/include/asm/setjmp.h
create mode 100644 arch/loongarch/include/asm/spl.h
create mode 100644 arch/loongarch/include/asm/stackframe.h
create mode 100644 arch/loongarch/include/asm/string.h
create mode 100644 arch/loongarch/include/asm/system.h
create mode 100644 arch/loongarch/include/asm/types.h
create mode 100644 arch/loongarch/include/asm/u-boot-loongarch.h
create mode 100644 arch/loongarch/include/asm/u-boot.h
create mode 100644 arch/loongarch/include/asm/unaligned.h
create mode 100644 arch/loongarch/lib/Makefile
create mode 100644 arch/loongarch/lib/asm-offsets.c
create mode 100644 arch/loongarch/lib/boot.c
create mode 100644 arch/loongarch/lib/bootm.c
create mode 100644 arch/loongarch/lib/cache.c
create mode 100644 arch/loongarch/lib/crt0_loongarch_efi.S
create mode 100644 arch/loongarch/lib/elf_loongarch_efi.lds
create mode 100644 arch/loongarch/lib/image.c
create mode 100644 arch/loongarch/lib/interrupts.c
create mode 100644 arch/loongarch/lib/reloc_loongarch_efi.c
create mode 100644 arch/loongarch/lib/reset.c
create mode 100644 arch/loongarch/lib/setjmp.S
create mode 100644 board/emulation/qemu-loongarch/Kconfig
create mode 100644 board/emulation/qemu-loongarch/MAINTAINERS
create mode 100644 board/emulation/qemu-loongarch/Makefile
create mode 100644 board/emulation/qemu-loongarch/qemu-loongarch.c
create mode 100644 board/emulation/qemu-loongarch/qemu-loongarch.env
create mode 100644 configs/qemu-loongarch64_defconfig
create mode 100644 doc/arch/loongarch.rst
create mode 100644 doc/board/emulation/qemu-loongarch.rst
create mode 100644 drivers/cpu/loongarch_cpu.c
create mode 100644 drivers/timer/loongarch_timer.c
create mode 100644 include/configs/qemu-loongarch.h
base-commit: 93d858da82ea0fa551af9aa6d50ef57fa94c5c49
--
2.55.0
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH v3 01/19] lib: fdtdec: Handle multiple memory nodes
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 02/19] linux/io.h: Use map_physmem to implement ioremap Yao Zi
` (17 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Current code only tries to fetch the first memory node found in
fdt tree and determine memory banks from multiple reg properties.
Specification allows multiple memory nodes in devicetree, rework
fdtdec_setup_mem_size_base_lowest and fdtdec_setup_memory_banksize
to iterate over all memory nodes.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Return directly from the inner loop of fdtdec_setup_memory_banksize(),
instead of using a goto
- Use %pap instead of %llx when appropriate
- Use phys_addr_t for base in fdtdec_get_next_memory_node()
Changed from v1
- Reword commit message to reflect the fact that dtspec allows multiple
memory nodes
- Replace sort_memory_banks() with qsort()
- Do not use CONFIG_VAL when referencing NR_DRAM_BANKS to avoid breaking
SPL build
- print gd->ram_size with %pap instead of %lx, drop unnecessary cast for
gd->ram_base in fdtdec_setup_size_base_lowest()
- Style improvements
include/asm-generic/global_data.h | 2 +-
lib/fdtdec.c | 127 +++++++++++++++++-------------
2 files changed, 74 insertions(+), 55 deletions(-)
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 886c12900ddb..75c80c8a0db4 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -462,7 +462,7 @@ struct global_data {
/**
* @dram: array describing DRAM banks (start address and size for each bank)
*/
- struct { /* RAM configuration */
+ struct dram_bank { /* RAM configuration */
phys_addr_t start;
phys_size_t size;
} dram[CONFIG_NR_DRAM_BANKS];
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index b91e067106dd..dfc30bdb8f85 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -36,6 +36,7 @@
#include <linux/lzo.h>
#include <linux/ioport.h>
#include <asm/global_data.h>
+#include <sort.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -1115,90 +1116,108 @@ ofnode fdtdec_get_next_memory_node(ofnode mem)
return get_next_memory_node(mem);
}
+static int cmp_memory_bank(const void *a, const void *b)
+{
+ const struct dram_bank *a1 = a, *b1 = b;
+
+ return a1->start > b1->start ? 1 :
+ a1->start < b1->start ? -1 : 0;
+}
+
int fdtdec_setup_memory_banksize(void)
{
- int bank, ret, reg = 0;
- struct resource res;
+ int bank = 0;
ofnode mem = ofnode_null();
- mem = get_next_memory_node(mem);
- if (!ofnode_valid(mem)) {
- debug("%s: Missing /memory node\n", __func__);
- return -EINVAL;
- }
+ while (true) {
+ struct resource res;
+ int reg = 0;
- for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
- ret = ofnode_read_resource(mem, reg++, &res);
- if (ret < 0) {
- reg = 0;
- mem = get_next_memory_node(mem);
- if (!ofnode_valid(mem))
- break;
+ mem = get_next_memory_node(mem);
+ if (!ofnode_valid(mem))
+ break;
+
+ while (true) {
+ int ret = ofnode_read_resource(mem, reg, &res);
- ret = ofnode_read_resource(mem, reg++, &res);
if (ret < 0)
break;
- }
- if (ret != 0)
- return -EINVAL;
+ if (bank >= CONFIG_NR_DRAM_BANKS) {
+ log_warning("%s: Too many memory banks\n", __func__);
+ return -EINVAL;
+ }
- gd->dram[bank].start = (phys_addr_t)res.start;
- gd->dram[bank].size =
- (phys_size_t)(res.end - res.start + 1);
+ gd->dram[bank].start = res.start;
+ gd->dram[bank].size =
+ (phys_size_t)(res.end - res.start + 1);
- debug("%s: DRAM Bank #%d: start = %pap, size = %pap\n",
- __func__, bank,
- &gd->dram[bank].start,
- &gd->dram[bank].size);
+ log_debug("%s: DRAM Bank #%d %s.%d: start = 0x%pap, size = 0x%pap\n",
+ __func__, bank, ofnode_get_name(mem), reg,
+ &gd->dram[bank].start, &gd->dram[bank].size);
+ reg++;
+ bank++;
+ }
}
+ if (!bank) {
+ log_warning("%s: Missing /memory node\n", __func__);
+ return -EINVAL;
+ }
+
+ qsort(gd->dram, bank, sizeof(gd->dram[0]), cmp_memory_bank);
+
return 0;
}
int fdtdec_setup_mem_size_base_lowest(void)
{
- int bank, ret, reg = 0;
- struct resource res;
- unsigned long base;
- phys_size_t size;
+ int bank = 0;
ofnode mem = ofnode_null();
+ __maybe_unused const char *final_name;
+ __maybe_unused int final_reg;
- gd->ram_base = (unsigned long)~0;
+ gd->ram_base = ULONG_MAX;
- mem = get_next_memory_node(mem);
- if (!ofnode_valid(mem)) {
- debug("%s: Missing /memory node\n", __func__);
- return -EINVAL;
- }
+ while (true) {
+ struct resource res;
+ phys_addr_t base;
+ phys_size_t size;
+ int reg = 0;
- for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
- ret = ofnode_read_resource(mem, reg++, &res);
- if (ret < 0) {
- reg = 0;
- mem = get_next_memory_node(mem);
- if (!ofnode_valid(mem))
- break;
+ mem = get_next_memory_node(mem);
+ if (!ofnode_valid(mem))
+ break;
+
+ while (true) {
+ int ret = ofnode_read_resource(mem, reg, &res);
- ret = ofnode_read_resource(mem, reg++, &res);
if (ret < 0)
break;
- }
- if (ret != 0)
- return -EINVAL;
-
- base = (unsigned long)res.start;
- size = (phys_size_t)(res.end - res.start + 1);
+ base = res.start;
+ size = res.end - res.start + 1;
+ if (gd->ram_base > base && size) {
+ gd->ram_base = base;
+ gd->ram_size = size;
+ final_name = ofnode_get_name(mem);
+ final_reg = reg;
+ }
- if (gd->ram_base > base && size) {
- gd->ram_base = base;
- gd->ram_size = size;
- debug("%s: Initial DRAM base %lx size %lx\n",
- __func__, base, (unsigned long)size);
+ reg++;
+ bank++;
}
}
+ if (!bank) {
+ log_warning("%s: Missing /memory node\n", __func__);
+ return -EINVAL;
+ }
+
+ log_debug("%s: Initial DRAM %s.%d: base %lx size %pap\n",
+ __func__, final_name, final_reg,
+ gd->ram_base, &gd->ram_size);
+
return 0;
}
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 02/19] linux/io.h: Use map_physmem to implement ioremap
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
2026-08-21 8:42 ` [PATCH v3 01/19] lib: fdtdec: Handle multiple memory nodes Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 03/19] image: Take entry point as an output of setup_booti Yao Zi
` (16 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi, Simon Glass
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
ioremap API is here to be compatible with Linux drivers,
to maintain compatibility we need to ensure we are using
the same way to determine virtual address for IO devices
from physical address.
map_physmem is U-Boot's standard way for doing the trick,
we should follow that. For architectures VA == PA it has
no impact, for MIPS it has it's own ioremap implementation
in asm/io.h anyway.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
Changed from v2
- Collect tags
No changes since v1
include/linux/io.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/io.h b/include/linux/io.h
index 79847886be95..ada6525a1c6a 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -59,11 +59,12 @@ static inline void iowrite64(u64 value, volatile void __iomem *addr)
static inline void __iomem *ioremap(resource_size_t offset,
resource_size_t size)
{
- return (void __iomem *)(unsigned long)offset;
+ return (void __iomem *)map_physmem(offset, size, MAP_NOCACHE);
}
static inline void iounmap(void __iomem *addr)
{
+ return unmap_physmem(addr, MAP_NOCACHE);
}
#endif
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 03/19] image: Take entry point as an output of setup_booti
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
2026-08-21 8:42 ` [PATCH v3 01/19] lib: fdtdec: Handle multiple memory nodes Yao Zi
2026-08-21 8:42 ` [PATCH v3 02/19] linux/io.h: Use map_physmem to implement ioremap Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 16:20 ` Tom Rini
2026-08-21 8:42 ` [PATCH v3 04/19] elf: Define LoongArch bits Yao Zi
` (15 subsequent siblings)
18 siblings, 1 reply; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
For LoongArch, the start of the image is not the entry point. Refactor
the code base to allow entry point to be supplied by booti_setup().
Also update the kerneldoc comment for booti_setup() to reflect the
latest argument lists.
Link: https://www.kernel.org/doc/html/v7.2/arch/loongarch/booting.html#header-of-linux-loongarch-kernel-images
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Improve commit message, attach a link to documentation of LoongArch
kernel image format
- Update kerneldoc comment for booti_setup()
Changed from v1
- Correct type of "entry" argument for RISC-V and sandbox
arch/arm/lib/image.c | 3 ++-
arch/riscv/lib/image.c | 4 +++-
arch/sandbox/lib/bootm.c | 2 +-
boot/bootm.c | 5 +++--
cmd/booti.c | 5 +++--
common/spl/spl.c | 9 +++++----
include/image.h | 7 ++++---
7 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/arch/arm/lib/image.c b/arch/arm/lib/image.c
index 2268661de93a..62c28b8310a5 100644
--- a/arch/arm/lib/image.c
+++ b/arch/arm/lib/image.c
@@ -29,7 +29,7 @@ struct Image_header {
};
int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
- bool force_reloc)
+ ulong *entry, bool force_reloc)
{
struct Image_header *ih;
uint64_t dst;
@@ -72,6 +72,7 @@ int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
dst = gd->dram[0].start;
*relocated_addr = ALIGN(dst, SZ_2M) + text_offset;
+ *entry = *relocated_addr;
unmap_sysmem(ih);
diff --git a/arch/riscv/lib/image.c b/arch/riscv/lib/image.c
index a82f48e9a505..300be365ddfd 100644
--- a/arch/riscv/lib/image.c
+++ b/arch/riscv/lib/image.c
@@ -33,7 +33,7 @@ struct linux_image_h {
};
int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
- bool force_reloc)
+ ulong *entry, bool force_reloc)
{
struct linux_image_h *lhdr;
@@ -56,6 +56,8 @@ int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
*relocated_addr = image;
}
+ *entry = *relocated_addr;
+
unmap_sysmem(lhdr);
return 0;
diff --git a/arch/sandbox/lib/bootm.c b/arch/sandbox/lib/bootm.c
index 7a5f6f7d36ed..1a41c7c2735b 100644
--- a/arch/sandbox/lib/bootm.c
+++ b/arch/sandbox/lib/bootm.c
@@ -84,7 +84,7 @@ int do_bootm_linux(int flag, struct bootm_info *bmi)
/* used for testing 'booti' command */
int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
- bool force_reloc)
+ ulong *entry, bool force_reloc)
{
log_err("Booting is not supported on the sandbox.\n");
diff --git a/boot/bootm.c b/boot/bootm.c
index 3bce85868346..2f92798f8320 100644
--- a/boot/bootm.c
+++ b/boot/bootm.c
@@ -723,9 +723,10 @@ static int bootm_load_os(struct bootm_headers *images, int boot_progress)
images->os.os == IH_OS_LINUX) {
ulong relocated_addr;
ulong image_size;
+ ulong entry;
int ret;
- ret = booti_setup(load, &relocated_addr, &image_size, false);
+ ret = booti_setup(load, &relocated_addr, &image_size, &entry, false);
if (ret) {
printf("Failed to prep arm64 kernel (err=%d)\n", ret);
return BOOTM_ERR_RESET;
@@ -739,7 +740,7 @@ static int bootm_load_os(struct bootm_headers *images, int boot_progress)
memmove((void *)relocated_addr, load_buf, image_size);
}
- images->ep = relocated_addr;
+ images->ep = entry;
images->os.start = relocated_addr;
images->os.end = relocated_addr + image_size;
}
diff --git a/cmd/booti.c b/cmd/booti.c
index e6f67d6e1368..24c55ff92a27 100644
--- a/cmd/booti.c
+++ b/cmd/booti.c
@@ -27,6 +27,7 @@ static int booti_start(struct bootm_info *bmi)
ulong ld;
ulong relocated_addr;
ulong image_size;
+ ulong entry;
uint8_t *temp;
ulong dest;
ulong dest_end;
@@ -74,7 +75,7 @@ static int booti_start(struct bootm_info *bmi)
}
unmap_sysmem((void *)ld);
- ret = booti_setup(ld, &relocated_addr, &image_size, false);
+ ret = booti_setup(ld, &relocated_addr, &image_size, &entry, false);
if (ret)
return 1;
@@ -85,7 +86,7 @@ static int booti_start(struct bootm_info *bmi)
memmove((void *)relocated_addr, (void *)ld, image_size);
}
- images->ep = relocated_addr;
+ images->ep = entry;
images->os.start = relocated_addr;
images->os.end = relocated_addr + image_size;
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 6c9a1a1cbcc3..3856aafbca9a 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -115,7 +115,8 @@ int __weak bootz_setup(ulong image, ulong *start, ulong *end)
return 1;
}
-int __weak booti_setup(ulong image, ulong *relocated_addr, ulong *size, bool force_reloc)
+int __weak booti_setup(ulong image, ulong *relocated_addr, ulong *size,
+ ulong *entry, bool force_reloc)
{
return 1;
}
@@ -342,13 +343,13 @@ int spl_parse_image_header(struct spl_image_info *spl_image,
}
if (IS_ENABLED(CONFIG_SPL_OS_BOOT) && IS_ENABLED(CONFIG_SPL_BOOTI)) {
- ulong start, size;
+ ulong start, size, entry;
- if (!booti_setup((ulong)header, &start, &size, 0)) {
+ if (!booti_setup((ulong)header, &start, &size, &entry, 0)) {
spl_image->name = "Linux";
spl_image->os = IH_OS_LINUX;
spl_image->load_addr = start;
- spl_image->entry_point = start;
+ spl_image->entry_point = entry;
spl_image->size = size;
debug(PHASE_PROMPT
"payload Image, load addr: 0x%lx size: %d\n",
diff --git a/include/image.h b/include/image.h
index 6edcb1995bfe..742e2b8cba7a 100644
--- a/include/image.h
+++ b/include/image.h
@@ -1126,16 +1126,17 @@ int image_setup_linux(struct bootm_headers *images);
int bootz_setup(ulong image, ulong *start, ulong *end);
/**
- * Return the correct start address and size of a Linux aarch64 Image.
+ * Return the correct start address and size of a Linux Image.
*
* @image: Address of image
- * @start: Returns start address of image
+ * @relocated_addr: Returns start address of image
* @size : Returns size image
+ * @entry: Returns entry point of image
* @force_reloc: Ignore image->ep field, always place image to RAM start
* Return: 0 if OK, 1 if the image was not recognised
*/
int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
- bool force_reloc);
+ ulong *entry, bool force_reloc);
/*******************************************************************/
/* New uImage format specific code (prefixed with fit_) */
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 04/19] elf: Define LoongArch bits
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (2 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 03/19] image: Take entry point as an output of setup_booti Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 05/19] image: Define IH_ARCH_LOONGARCH Yao Zi
` (14 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi, Simon Glass
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
They all come from glibc's elf.h
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
Changed from v2
- Collect tags
- Drop a redundant blank line between /* Version */ comment and
EM_LOONGARCH definition
Changed from v1
- Re-title to "elf: Define LoongArch bits" (with the semicolon)
- No function changes involved
include/elf.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/elf.h b/include/elf.h
index b88e6cf4032b..67d519cd9174 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -225,7 +225,7 @@ typedef struct {
#define EM_MN10300 89 /* Matsushita MN10200 */
#define EM_MN10200 90 /* Matsushita MN10200 */
#define EM_PJ 91 /* picoJava */
-#define EM_NUM 92 /* number of machine types */
+#define EM_LOONGARCH 258 /* LoongArch */
/* Version */
#define EV_NONE 0 /* Invalid */
@@ -705,6 +705,12 @@ unsigned long elf_hash(const unsigned char *name);
#define R_RISCV_64 2
#define R_RISCV_RELATIVE 3
+/* LoongArch Relocations */
+#define R_LARCH_NONE 0
+#define R_LARCH_32 1
+#define R_LARCH_64 2
+#define R_LARCH_RELATIVE 3
+
#ifndef __ASSEMBLY__
unsigned long bootelf_exec(ulong (*entry)(int, char * const[]),
int argc, char *const argv[]);
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 05/19] image: Define IH_ARCH_LOONGARCH
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (3 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 04/19] elf: Define LoongArch bits Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 06/19] LoongArch: skeleton and headers Yao Zi
` (13 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi, Simon Glass
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Allocate the next value to IH_ARCH_LOONGARCH.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
(No functional changes since v1)
boot/image.c | 1 +
include/image.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/boot/image.c b/boot/image.c
index 185d52ba492f..fddbf01e04f2 100644
--- a/boot/image.c
+++ b/boot/image.c
@@ -86,6 +86,7 @@ static const table_entry_t uimage_arch[] = {
{ IH_ARCH_X86_64, "x86_64", "AMD x86_64", },
{ IH_ARCH_XTENSA, "xtensa", "Xtensa", },
{ IH_ARCH_RISCV, "riscv", "RISC-V", },
+ { IH_ARCH_LOONGARCH, "loongarch", "LoongArch", },
{ -1, "", "", },
};
diff --git a/include/image.h b/include/image.h
index 742e2b8cba7a..df19f60a4523 100644
--- a/include/image.h
+++ b/include/image.h
@@ -139,6 +139,7 @@ enum {
IH_ARCH_X86_64, /* AMD x86_64, Intel and Via */
IH_ARCH_XTENSA, /* Xtensa */
IH_ARCH_RISCV, /* RISC-V */
+ IH_ARCH_LOONGARCH, /* Loongson LoongArch */
IH_ARCH_COUNT,
};
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 06/19] LoongArch: skeleton and headers
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (4 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 05/19] image: Define IH_ARCH_LOONGARCH Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 07/19] LoongArch: lib: General routines Yao Zi
` (12 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Commit for directories, Kconfig, Makefile and headers, aiming to build
for 64-bit LoongArch hardware with FPU.
Some of them are copied from linux, some of them are derived
from other architectures, the rest are written on my own.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Expand the commit message to mention the targetting architecture
- Fix definition of SZREG in arch/loongarch/include/asm/asm.h
- Rewrite irq save/restore helpers
- Define BITS_PER_LONG as constant 64 for now
- Drop unnecessary declaration of "struct event" in asm/system.h
- Gate ABI/march-related flags in arch/loongarch/Makefile on
CONFIG_ARCH_LA64
- Clean up setjmp.h and select HAVE_SETJMP
- Add FRAMEPOINTER-related Kconfig stuff
- Select lp64d instead of lp64s ABI, so toolchain shipping only lp64d
libgcc doesn't complain. Support for platforms without FPU will be
re-considered later.
Changed from v1
- Remove the redundant dtbs target from arch/loongarch/dts/Makefile
- Add loongarch64 definitions for HOST_ARCH
- Whitespace clean-up
Makefile | 2 +
arch/Kconfig | 16 +
arch/loongarch/Kconfig | 40 +
arch/loongarch/Makefile | 21 +
arch/loongarch/config.mk | 23 +
arch/loongarch/cpu/Makefile | 5 +
arch/loongarch/cpu/u-boot.lds | 85 +
arch/loongarch/dts/Makefile | 6 +
arch/loongarch/include/asm/acpi_table.h | 8 +
arch/loongarch/include/asm/addrspace.h | 86 +
.../include/asm/arch-generic/entry-init.h | 15 +
arch/loongarch/include/asm/asm.h | 186 +++
arch/loongarch/include/asm/atomic.h | 12 +
arch/loongarch/include/asm/barrier.h | 138 ++
arch/loongarch/include/asm/bitops.h | 156 ++
arch/loongarch/include/asm/byteorder.h | 22 +
arch/loongarch/include/asm/cache.h | 24 +
arch/loongarch/include/asm/config.h | 11 +
arch/loongarch/include/asm/cpu.h | 123 ++
arch/loongarch/include/asm/dma-mapping.h | 27 +
arch/loongarch/include/asm/global_data.h | 43 +
arch/loongarch/include/asm/gpio.h | 11 +
arch/loongarch/include/asm/io.h | 399 +++++
arch/loongarch/include/asm/linkage.h | 11 +
arch/loongarch/include/asm/loongarch.h | 1467 +++++++++++++++++
arch/loongarch/include/asm/posix_types.h | 87 +
arch/loongarch/include/asm/processor.h | 11 +
arch/loongarch/include/asm/ptrace.h | 33 +
arch/loongarch/include/asm/regdef.h | 42 +
arch/loongarch/include/asm/sections.h | 8 +
arch/loongarch/include/asm/setjmp.h | 20 +
arch/loongarch/include/asm/spl.h | 11 +
arch/loongarch/include/asm/string.h | 11 +
arch/loongarch/include/asm/system.h | 72 +
arch/loongarch/include/asm/types.h | 37 +
arch/loongarch/include/asm/u-boot-loongarch.h | 23 +
arch/loongarch/include/asm/u-boot.h | 30 +
arch/loongarch/include/asm/unaligned.h | 11 +
arch/loongarch/lib/Makefile | 5 +
include/host_arch.h | 2 +
40 files changed, 3340 insertions(+)
create mode 100644 arch/loongarch/Kconfig
create mode 100644 arch/loongarch/Makefile
create mode 100644 arch/loongarch/config.mk
create mode 100644 arch/loongarch/cpu/Makefile
create mode 100644 arch/loongarch/cpu/u-boot.lds
create mode 100644 arch/loongarch/dts/Makefile
create mode 100644 arch/loongarch/include/asm/acpi_table.h
create mode 100644 arch/loongarch/include/asm/addrspace.h
create mode 100644 arch/loongarch/include/asm/arch-generic/entry-init.h
create mode 100644 arch/loongarch/include/asm/asm.h
create mode 100644 arch/loongarch/include/asm/atomic.h
create mode 100644 arch/loongarch/include/asm/barrier.h
create mode 100644 arch/loongarch/include/asm/bitops.h
create mode 100644 arch/loongarch/include/asm/byteorder.h
create mode 100644 arch/loongarch/include/asm/cache.h
create mode 100644 arch/loongarch/include/asm/config.h
create mode 100644 arch/loongarch/include/asm/cpu.h
create mode 100644 arch/loongarch/include/asm/dma-mapping.h
create mode 100644 arch/loongarch/include/asm/global_data.h
create mode 100644 arch/loongarch/include/asm/gpio.h
create mode 100644 arch/loongarch/include/asm/io.h
create mode 100644 arch/loongarch/include/asm/linkage.h
create mode 100644 arch/loongarch/include/asm/loongarch.h
create mode 100644 arch/loongarch/include/asm/posix_types.h
create mode 100644 arch/loongarch/include/asm/processor.h
create mode 100644 arch/loongarch/include/asm/ptrace.h
create mode 100644 arch/loongarch/include/asm/regdef.h
create mode 100644 arch/loongarch/include/asm/sections.h
create mode 100644 arch/loongarch/include/asm/setjmp.h
create mode 100644 arch/loongarch/include/asm/spl.h
create mode 100644 arch/loongarch/include/asm/string.h
create mode 100644 arch/loongarch/include/asm/system.h
create mode 100644 arch/loongarch/include/asm/types.h
create mode 100644 arch/loongarch/include/asm/u-boot-loongarch.h
create mode 100644 arch/loongarch/include/asm/u-boot.h
create mode 100644 arch/loongarch/include/asm/unaligned.h
create mode 100644 arch/loongarch/lib/Makefile
diff --git a/Makefile b/Makefile
index 98702205c36d..9d7015f954df 100644
--- a/Makefile
+++ b/Makefile
@@ -243,6 +243,8 @@ else ifeq ("riscv32", $(MK_ARCH))
export HOST_ARCH=$(HOST_ARCH_RISCV32)
else ifeq ("riscv64", $(MK_ARCH))
export HOST_ARCH=$(HOST_ARCH_RISCV64)
+else ifeq ("loongarch64", $(MK_ARCH))
+ export HOST_ARCH=$(HOST_ARCH_LOONGARCH64)
endif
undefine MK_ARCH
diff --git a/arch/Kconfig b/arch/Kconfig
index 8d63afeb138e..3489738ca38d 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -110,6 +110,21 @@ config ARM
select SUPPORT_LITTLE_ENDIAN
select SUPPORT_OF_CONTROL
+config LOONGARCH
+ bool "LoongArch architecture"
+ select HAVE_SETJMP
+ select CREATE_ARCH_SYMLINK
+ select SUPPORT_OF_CONTROL
+ select OF_CONTROL
+ select DM
+ select DM_EVENT
+ imply DM_SERIAL
+ imply BLK
+ imply CLK
+ imply MTD
+ imply TIMER
+ imply CMD_DM
+
config M68K
bool "M68000 architecture"
select HAVE_PRIVATE_LIBGCC
@@ -569,6 +584,7 @@ config SYS_NONCACHED_MEMORY
source "arch/arc/Kconfig"
source "arch/arm/Kconfig"
+source "arch/loongarch/Kconfig"
source "arch/m68k/Kconfig"
source "arch/microblaze/Kconfig"
source "arch/mips/Kconfig"
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
new file mode 100644
index 000000000000..4e8e9d4ee88b
--- /dev/null
+++ b/arch/loongarch/Kconfig
@@ -0,0 +1,40 @@
+menu "LoongArch architecture"
+ depends on LOONGARCH
+
+config SYS_ARCH
+ default "loongarch"
+
+choice
+ prompt "Target select"
+
+endchoice
+
+# board-specific options below
+
+# platform-specific options below
+
+# architecture-specific options below
+choice
+ prompt "Base ISA"
+
+config ARCH_LA64
+ bool "LoongArch64"
+ select 64BIT
+ select PHYS_64BIT
+ help
+ Choose this option to target the LoongArch64 base ISA.
+
+endchoice
+
+config DMA_ADDR_T_64BIT
+ bool
+ default y if 64BIT
+
+config STACK_SIZE_SHIFT
+ int
+ default 14
+
+config OF_BOARD_FIXUP
+ default y if OF_SEPARATE
+
+endmenu
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
new file mode 100644
index 000000000000..b507d94613e0
--- /dev/null
+++ b/arch/loongarch/Makefile
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
+ifeq ($(CONFIG_ARCH_LA64),y)
+ ARCH_FLAGS = -march=loongarch64 -mabi=lp64d
+endif
+
+ifeq ($(CONFIG_$(SPL_)FRAMEPOINTER),y)
+ ARCH_FLAGS += -fno-omit-frame-pointer
+endif
+
+PLATFORM_CPPFLAGS += $(ARCH_FLAGS)
+
+head-y := arch/loongarch/cpu/start.o
+
+libs-y += arch/loongarch/cpu/
+libs-y += arch/loongarch/cpu/$(CPU)/
+libs-y += arch/loongarch/lib/
+
diff --git a/arch/loongarch/config.mk b/arch/loongarch/config.mk
new file mode 100644
index 000000000000..7c247400e361
--- /dev/null
+++ b/arch/loongarch/config.mk
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
+32bit-bfd = elf32-loongarch
+64bit-bfd = elf64-loongarch
+32bit-emul = elf32loongarch
+64bit-emul = elf64loongarch
+
+ifdef CONFIG_32BIT
+KBUILD_LDFLAGS += -m $(32bit-emul)
+PLATFORM_ELFFLAGS += -B loongarch -O $(32bit-bfd)
+endif
+
+ifdef CONFIG_64BIT
+KBUILD_LDFLAGS += -m $(64bit-emul)
+PLATFORM_ELFFLAGS += -B loongarch -O $(64bit-bfd)
+endif
+
+PLATFORM_CPPFLAGS += -fpic
+PLATFORM_RELFLAGS += -fno-common -ffunction-sections -fdata-sections
+LDFLAGS_u-boot += --gc-sections -static -pie
diff --git a/arch/loongarch/cpu/Makefile b/arch/loongarch/cpu/Makefile
new file mode 100644
index 000000000000..3dbed94cc624
--- /dev/null
+++ b/arch/loongarch/cpu/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
diff --git a/arch/loongarch/cpu/u-boot.lds b/arch/loongarch/cpu/u-boot.lds
new file mode 100644
index 000000000000..2f0201c0c817
--- /dev/null
+++ b/arch/loongarch/cpu/u-boot.lds
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+OUTPUT_ARCH(loongarch)
+ENTRY(_start)
+
+SECTIONS
+{
+ . = ALIGN(4);
+ .text : {
+ arch/loongarch/cpu/start.o (.text)
+ }
+
+ /* This needs to come before *(.text*) */
+ .efi_runtime : {
+ __efi_runtime_start = .;
+ *(.text.efi_runtime*)
+ *(.rodata.efi_runtime*)
+ *(.data.efi_runtime*)
+ __efi_runtime_stop = .;
+ }
+
+ .text_rest : {
+ *(.text*)
+ }
+
+ . = ALIGN(4);
+ .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+ . = ALIGN(4);
+ .data : {
+ *(.data*)
+ }
+ . = ALIGN(4);
+
+ .got : {
+ __got_start = .;
+ *(.got.plt) *(.got)
+ __got_end = .;
+ }
+
+ . = ALIGN(4);
+
+ __u_boot_list : {
+ KEEP(*(SORT(__u_boot_list*)));
+ }
+
+ . = ALIGN(8);
+
+ .efi_runtime_rel : {
+ __efi_runtime_rel_start = .;
+ *(.rel*.efi_runtime)
+ *(.rel*.efi_runtime.*)
+ __efi_runtime_rel_stop = .;
+ }
+
+ /DISCARD/ : { *(.rela.plt*) }
+ .rela.dyn : {
+ __rel_dyn_start = .;
+ *(.rela*)
+ __rel_dyn_end = .;
+ }
+
+ . = ALIGN(8);
+
+ .dynsym : {
+ __dyn_sym_start = .;
+ *(.dynsym)
+ __dyn_sym_end = .;
+ }
+
+ . = ALIGN(8);
+
+ _end = .;
+ __init_end = .;
+
+ .bss : {
+ __bss_start = .;
+ *(.bss*)
+ . = ALIGN(8);
+ __bss_end = .;
+ }
+}
diff --git a/arch/loongarch/dts/Makefile b/arch/loongarch/dts/Makefile
new file mode 100644
index 000000000000..5cc395b6ea5d
--- /dev/null
+++ b/arch/loongarch/dts/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+include $(srctree)/scripts/Makefile.dts
+
+# Add any required device tree compiler flags here
+DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/loongarch/include/asm/acpi_table.h b/arch/loongarch/include/asm/acpi_table.h
new file mode 100644
index 000000000000..db2f644f07af
--- /dev/null
+++ b/arch/loongarch/include/asm/acpi_table.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __ASM_ACPI_TABLE_H__
+#define __ASM_ACPI_TABLE_H__
+
+/* Dummy header */
+
+#endif /* __ASM_ACPI_TABLE_H__ */
diff --git a/arch/loongarch/include/asm/addrspace.h b/arch/loongarch/include/asm/addrspace.h
new file mode 100644
index 000000000000..e2f534ee22c7
--- /dev/null
+++ b/arch/loongarch/include/asm/addrspace.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ *
+ * Derived from MIPS:
+ * Copyright (C) 1996, 99 Ralf Baechle
+ * Copyright (C) 2000, 2002 Maciej W. Rozycki
+ * Copyright (C) 1990, 1999 by Silicon Graphics, Inc.
+ */
+#ifndef _ASM_ADDRSPACE_H
+#define _ASM_ADDRSPACE_H
+
+#include <linux/const.h>
+#include <linux/sizes.h>
+
+#include <asm/loongarch.h>
+
+#ifndef IO_BASE
+#define IO_BASE CSR_DMW0_BASE
+#endif
+
+#ifndef CACHE_BASE
+#define CACHE_BASE CSR_DMW1_BASE
+#endif
+
+#ifndef UNCACHE_BASE
+#define UNCACHE_BASE CSR_DMW0_BASE
+#endif
+
+#define DMW_PABITS 48
+#define TO_PHYS_MASK ((1ULL << DMW_PABITS) - 1)
+
+#define TO_PHYS(x) ( ((x) & TO_PHYS_MASK))
+#define TO_CACHE(x) (CACHE_BASE | ((x) & TO_PHYS_MASK))
+#define TO_UNCACHE(x) (UNCACHE_BASE | ((x) & TO_PHYS_MASK))
+
+#ifdef __ASSEMBLY__
+#define _ATYPE_
+#define _ATYPE32_
+#define _ATYPE64_
+#else
+#define _ATYPE_ __PTRDIFF_TYPE__
+#define _ATYPE32_ int
+#define _ATYPE64_ __s64
+#endif
+
+#ifdef CONFIG_64BIT
+#define _CONST64_(x) _UL(x)
+#else
+#define _CONST64_(x) _ULL(x)
+#endif
+
+/*
+ * 32/64-bit LoongArch address spaces
+ */
+#ifdef __ASSEMBLY__
+#define _ACAST32_
+#define _ACAST64_
+#else
+#define _ACAST32_ (_ATYPE_)(_ATYPE32_) /* widen if necessary */
+#define _ACAST64_ (_ATYPE64_) /* do _not_ narrow */
+#endif
+
+#ifdef CONFIG_32BIT
+
+#define UVRANGE 0x00000000
+#define KPRANGE0 0x80000000
+#define KPRANGE1 0xa0000000
+#define KVRANGE 0xc0000000
+
+#else
+
+#define XUVRANGE _CONST64_(0x0000000000000000)
+#define XSPRANGE _CONST64_(0x4000000000000000)
+#define XKPRANGE _CONST64_(0x8000000000000000)
+#define XKVRANGE _CONST64_(0xc000000000000000)
+
+#endif
+
+/*
+ * Returns the physical address of a KPRANGEx / XKPRANGE address
+ */
+#define PHYSADDR(a) ((_ACAST64_(a)) & TO_PHYS_MASK)
+
+#endif /* _ASM_ADDRSPACE_H */
diff --git a/arch/loongarch/include/asm/arch-generic/entry-init.h b/arch/loongarch/include/asm/arch-generic/entry-init.h
new file mode 100644
index 000000000000..a618f66d0d7a
--- /dev/null
+++ b/arch/loongarch/include/asm/arch-generic/entry-init.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_ENTRY_INIT_H
+#define __ASM_ENTRY_INIT_H
+
+ .macro entry_setup
+ .endm
+
+ .macro smp_secondary_setup
+ .endm
+
+#endif
diff --git a/arch/loongarch/include/asm/asm.h b/arch/loongarch/include/asm/asm.h
new file mode 100644
index 000000000000..e6367609b490
--- /dev/null
+++ b/arch/loongarch/include/asm/asm.h
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Some useful macros for LoongArch assembler code
+ *
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ *
+ * Derived from MIPS:
+ * Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle
+ * Copyright (C) 1999 by Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ * Copyright (C) 2002 Maciej W. Rozycki
+ */
+#ifndef __ASM_ASM_H
+#define __ASM_ASM_H
+
+#include <asm/regdef.h>
+
+/*
+ * Stack alignment
+ */
+#define STACK_ALIGN ~(0xf)
+
+/*
+ * Macros to handle different pointer/register sizes for 32/64-bit code
+ */
+
+/*
+ * Size of a register
+ */
+#if defined(__loongarch__) && __loongarch_grlen == 32
+#define SZREG 4
+#else
+#define SZREG 8
+#endif
+
+/*
+ * Use the following macros in assemblercode to load/store registers,
+ * pointers etc.
+ */
+#if (SZREG == 4)
+#define REG_L ld.w
+#define REG_S st.w
+#define REG_ADD add.w
+#define REG_SUB sub.w
+#else /* SZREG == 8 */
+#define REG_L ld.d
+#define REG_S st.d
+#define REG_ADD add.d
+#define REG_SUB sub.d
+#endif
+
+/*
+ * How to add/sub/load/store/shift C int variables.
+ */
+#if (__SIZEOF_INT__ == 4)
+#define INT_ADD add.w
+#define INT_ADDI addi.w
+#define INT_SUB sub.w
+#define INT_L ld.w
+#define INT_S st.w
+#define INT_SLL slli.w
+#define INT_SLLV sll.w
+#define INT_SRL srli.w
+#define INT_SRLV srl.w
+#define INT_SRA srai.w
+#define INT_SRAV sra.w
+#endif
+
+#if (__SIZEOF_INT__ == 8)
+#define INT_ADD add.d
+#define INT_ADDI addi.d
+#define INT_SUB sub.d
+#define INT_L ld.d
+#define INT_S st.d
+#define INT_SLL slli.d
+#define INT_SLLV sll.d
+#define INT_SRL srli.d
+#define INT_SRLV srl.d
+#define INT_SRA srai.d
+#define INT_SRAV sra.d
+#endif
+
+/*
+ * How to add/sub/load/store/shift C long variables.
+ */
+#if (__SIZEOF_LONG__ == 4)
+#define LONG_ADD add.w
+#define LONG_ADDI addi.w
+#define LONG_SUB sub.w
+#define LONG_L ld.w
+#define LONG_LI li.w
+#define LONG_S st.w
+#define LONG_SLL slli.w
+#define LONG_SLLV sll.w
+#define LONG_SRL srli.w
+#define LONG_SRLV srl.w
+#define LONG_SRA srai.w
+#define LONG_SRAV sra.w
+#define LONG_IOCSRRD iocsrrd.w
+#define LONG_IOCSRWR iocsrwr.w
+
+#ifdef __ASSEMBLY__
+#define LONG .word
+#endif
+#define LONGSIZE 4
+#define LONGMASK 3
+#define LONGLOG 2
+#endif
+
+#if (__SIZEOF_LONG__ == 8)
+#define LONG_ADD add.d
+#define LONG_ADDI addi.d
+#define LONG_SUB sub.d
+#define LONG_L ld.d
+#define LONG_LI li.d
+#define LONG_S st.d
+#define LONG_SLL slli.d
+#define LONG_SLLV sll.d
+#define LONG_SRL srli.d
+#define LONG_SRLV srl.d
+#define LONG_SRA srai.d
+#define LONG_SRAV sra.d
+#define LONG_IOCSRRD iocsrrd.w
+#define LONG_IOCSRWR iocsrwr.w
+
+#ifdef __ASSEMBLY__
+#define LONG .dword
+#endif
+#define LONGSIZE 8
+#define LONGMASK 7
+#define LONGLOG 3
+#endif
+
+/*
+ * How to add/sub/load/store/shift pointers.
+ */
+#if (__SIZEOF_POINTER__ == 4)
+#define PTR_ADD add.w
+#define PTR_ADDI addi.w
+#define PTR_SUB sub.w
+#define PTR_L ld.w
+#define PTR_S st.w
+#define PTR_LI li.w
+#define PTR_SLL slli.w
+#define PTR_SLLV sll.w
+#define PTR_SRL srli.w
+#define PTR_SRLV srl.w
+#define PTR_SRA srai.w
+#define PTR_SRAV sra.w
+#define PTR_MUL mul.w
+
+#define PTR_SCALESHIFT 2
+
+#ifdef __ASSEMBLY__
+#define PTR .word
+#endif
+#define PTRSIZE 4
+#define PTRLOG 2
+#endif
+
+#if (__SIZEOF_POINTER__ == 8)
+#define PTR_ADD add.d
+#define PTR_ADDI addi.d
+#define PTR_SUB sub.d
+#define PTR_L ld.d
+#define PTR_S st.d
+#define PTR_LI li.d
+#define PTR_SLL slli.d
+#define PTR_SLLV sll.d
+#define PTR_SRL srli.d
+#define PTR_SRLV srl.d
+#define PTR_SRA srai.d
+#define PTR_SRAV sra.d
+#define PTR_MUL mul.d
+
+#define PTR_SCALESHIFT 3
+
+#ifdef __ASSEMBLY__
+#define PTR .dword
+#endif
+#define PTRSIZE 8
+#define PTRLOG 3
+#endif
+
+#endif /* __ASM_ASM_H */
diff --git a/arch/loongarch/include/asm/atomic.h b/arch/loongarch/include/asm/atomic.h
new file mode 100644
index 000000000000..abd0b6f5f342
--- /dev/null
+++ b/arch/loongarch/include/asm/atomic.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __LOONGARCH_ATOMIC_H
+#define __LOONGARCH_ATOMIC_H
+
+#include <asm/system.h>
+#include <asm-generic/atomic.h>
+
+#endif
diff --git a/arch/loongarch/include/asm/barrier.h b/arch/loongarch/include/asm/barrier.h
new file mode 100644
index 000000000000..952222116f50
--- /dev/null
+++ b/arch/loongarch/include/asm/barrier.h
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+#ifndef __ASM_BARRIER_H
+#define __ASM_BARRIER_H
+
+/*
+ * Hint encoding:
+ *
+ * Bit4: ordering or completion (0: completion, 1: ordering)
+ * Bit3: barrier for previous read (0: true, 1: false)
+ * Bit2: barrier for previous write (0: true, 1: false)
+ * Bit1: barrier for succeeding read (0: true, 1: false)
+ * Bit0: barrier for succeeding write (0: true, 1: false)
+ *
+ * Hint 0x700: barrier for "read after read" from the same address
+ */
+
+#define DBAR(hint) __asm__ __volatile__("dbar %0 " : : "I"(hint) : "memory")
+
+#define crwrw 0b00000
+#define cr_r_ 0b00101
+#define c_w_w 0b01010
+
+#define orwrw 0b10000
+#define or_r_ 0b10101
+#define o_w_w 0b11010
+
+#define orw_w 0b10010
+#define or_rw 0b10100
+
+#define c_sync() DBAR(crwrw)
+#define c_rsync() DBAR(cr_r_)
+#define c_wsync() DBAR(c_w_w)
+
+#define o_sync() DBAR(orwrw)
+#define o_rsync() DBAR(or_r_)
+#define o_wsync() DBAR(o_w_w)
+
+#define ldacq_mb() DBAR(or_rw)
+#define strel_mb() DBAR(orw_w)
+
+#define mb() c_sync()
+#define rmb() c_rsync()
+#define wmb() c_wsync()
+#define iob() c_sync()
+#define wbflush() c_sync()
+
+#define __smp_mb() o_sync()
+#define __smp_rmb() o_rsync()
+#define __smp_wmb() o_wsync()
+
+#ifdef CONFIG_SMP
+#define __WEAK_LLSC_MB " dbar 0x700 \n"
+#else
+#define __WEAK_LLSC_MB " \n"
+#endif
+
+#define __smp_mb__before_atomic() barrier()
+#define __smp_mb__after_atomic() barrier()
+
+/**
+ * array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise
+ * @index: array element index
+ * @size: number of elements in array
+ *
+ * Returns:
+ * 0 - (@index < @size)
+ */
+#define array_index_mask_nospec array_index_mask_nospec
+static inline unsigned long array_index_mask_nospec(unsigned long index,
+ unsigned long size)
+{
+ unsigned long mask;
+
+ __asm__ __volatile__(
+ "sltu %0, %1, %2\n\t"
+#if (__SIZEOF_LONG__ == 4)
+ "sub.w %0, $zero, %0\n\t"
+#elif (__SIZEOF_LONG__ == 8)
+ "sub.d %0, $zero, %0\n\t"
+#endif
+ : "=r" (mask)
+ : "r" (index), "r" (size)
+ :);
+
+ return mask;
+}
+
+#define __smp_load_acquire(p) \
+({ \
+ typeof(*p) ___p1 = READ_ONCE(*p); \
+ compiletime_assert_atomic_type(*p); \
+ ldacq_mb(); \
+ ___p1; \
+})
+
+#define __smp_store_release(p, v) \
+do { \
+ compiletime_assert_atomic_type(*p); \
+ strel_mb(); \
+ WRITE_ONCE(*p, v); \
+} while (0)
+
+#define __smp_store_mb(p, v) \
+do { \
+ union { typeof(p) __val; char __c[1]; } __u = \
+ { .__val = (__force typeof(p)) (v) }; \
+ unsigned long __tmp; \
+ switch (sizeof(p)) { \
+ case 1: \
+ *(volatile __u8 *)&p = *(__u8 *)__u.__c; \
+ __smp_mb(); \
+ break; \
+ case 2: \
+ *(volatile __u16 *)&p = *(__u16 *)__u.__c; \
+ __smp_mb(); \
+ break; \
+ case 4: \
+ __asm__ __volatile__( \
+ "amswap_db.w %[tmp], %[val], %[mem] \n" \
+ : [mem] "+ZB" (*(u32 *)&p), [tmp] "=&r" (__tmp) \
+ : [val] "r" (*(__u32 *)__u.__c) \
+ : ); \
+ break; \
+ case 8: \
+ __asm__ __volatile__( \
+ "amswap_db.d %[tmp], %[val], %[mem] \n" \
+ : [mem] "+ZB" (*(u64 *)&p), [tmp] "=&r" (__tmp) \
+ : [val] "r" (*(__u64 *)__u.__c) \
+ : ); \
+ break; \
+ } \
+} while (0)
+
+#endif /* __ASM_BARRIER_H */
diff --git a/arch/loongarch/include/asm/bitops.h b/arch/loongarch/include/asm/bitops.h
new file mode 100644
index 000000000000..32a60d218b7e
--- /dev/null
+++ b/arch/loongarch/include/asm/bitops.h
@@ -0,0 +1,156 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 1995, Russell King.
+ * Various bits and pieces copyrights include:
+ * Linus Torvalds (test_bit).
+ *
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ *
+ * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
+ *
+ * Please note that the code in this file should never be included
+ * from user space. Many of these are not implemented in assembler
+ * since they would be too costly. Also, they require privileged
+ * instructions (which are not available from user mode) to ensure
+ * that they are atomic.
+ */
+
+#ifndef __ASM_LOONGARCH_BITOPS_H
+#define __ASM_LOONGARCH_BITOPS_H
+
+#ifdef __KERNEL__
+
+#include <asm/barrier.h>
+
+#include <asm-generic/bitops/builtin-ffs.h>
+#include <asm-generic/bitops/builtin-fls.h>
+#include <asm-generic/bitops/builtin-__ffs.h>
+#include <asm-generic/bitops/builtin-__fls.h>
+#include <asm-generic/bitops/fls64.h>
+
+#define PLATFORM_FFS
+
+static inline void __change_bit(int nr, void *addr)
+{
+ int mask;
+ unsigned long *ADDR = (unsigned long *)addr;
+
+ ADDR += nr >> 5;
+ mask = 1 << (nr & 31);
+ *ADDR ^= mask;
+}
+
+static inline int __test_and_set_bit(int nr, void *addr)
+{
+ int mask, retval;
+ unsigned int *a = (unsigned int *)addr;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ retval = (mask & *a) != 0;
+ *a |= mask;
+ return retval;
+}
+
+static inline int __test_and_clear_bit(int nr, void *addr)
+{
+ int mask, retval;
+ unsigned int *a = (unsigned int *)addr;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ retval = (mask & *a) != 0;
+ *a &= ~mask;
+ return retval;
+}
+
+static inline int __test_and_change_bit(int nr, void *addr)
+{
+ int mask, retval;
+ unsigned int *a = (unsigned int *)addr;
+
+ a += nr >> 5;
+ mask = 1 << (nr & 0x1f);
+ retval = (mask & *a) != 0;
+ *a ^= mask;
+ return retval;
+}
+
+/*
+ * This routine doesn't need to be atomic.
+ */
+static inline int test_bit(int nr, const void *addr)
+{
+ return ((unsigned char *)addr)[nr >> 3] & (1U << (nr & 7));
+}
+
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+static inline unsigned long ffz(unsigned long word)
+{
+ int k;
+
+ word = ~word;
+ k = 31;
+ if (word & 0x0000ffff) {
+ k -= 16; word <<= 16;
+ }
+ if (word & 0x00ff0000) {
+ k -= 8; word <<= 8;
+ }
+ if (word & 0x0f000000) {
+ k -= 4; word <<= 4;
+ }
+ if (word & 0x30000000) {
+ k -= 2; word <<= 2;
+ }
+ if (word & 0x40000000)
+ k -= 1;
+
+ return k;
+}
+
+/*
+ * ffs: find first bit set. This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+
+/*
+ * redefined in include/linux/bitops.h
+ * #define ffs(x) generic_ffs(x)
+ */
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
+
+#define test_and_set_bit __test_and_set_bit
+#define test_and_clear_bit __test_and_clear_bit
+
+#define ext2_set_bit test_and_set_bit
+#define ext2_clear_bit test_and_clear_bit
+#define ext2_test_bit test_bit
+#define ext2_find_first_zero_bit find_first_zero_bit
+#define ext2_find_next_zero_bit find_next_zero_bit
+
+/* Bitmap functions for the minix filesystem. */
+#define minix_test_and_set_bit(nr, addr) test_and_set_bit(nr, addr)
+#define minix_set_bit(nr, addr) set_bit(nr, addr)
+#define minix_test_and_clear_bit(nr, addr) test_and_clear_bit(nr, addr)
+#define minix_test_bit(nr, addr) test_bit(nr, addr)
+#define minix_find_first_zero_bit(addr, size) find_first_zero_bit(addr, size)
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_LOONGARCH_BITOPS_H */
diff --git a/arch/loongarch/include/asm/byteorder.h b/arch/loongarch/include/asm/byteorder.h
new file mode 100644
index 000000000000..ba25f25729ac
--- /dev/null
+++ b/arch/loongarch/include/asm/byteorder.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_BYTEORDER_H
+#define __ASM_LOONGARCH_BYTEORDER_H
+
+#include <asm/types.h>
+
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+# define __BYTEORDER_HAS_U64__
+# define __SWAB_64_THRU_32__
+#endif
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#include <linux/byteorder/little_endian.h>
+#else
+#include <linux/byteorder/big_endian.h>
+#endif
+
+#endif
diff --git a/arch/loongarch/include/asm/cache.h b/arch/loongarch/include/asm/cache.h
new file mode 100644
index 000000000000..854dd0c0a02e
--- /dev/null
+++ b/arch/loongarch/include/asm/cache.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef _ASM_LOONGARCH_CACHE_H
+#define _ASM_LOONGARCH_CACHE_H
+
+/* cache */
+void cache_flush(void);
+
+#define cache_op(op, addr) \
+ __asm__ __volatile__( \
+ " cacop %0, %1 \n" \
+ : \
+ : "i" (op), "ZC" (*(unsigned char *)(addr)))
+
+#ifdef CONFIG_SYS_CACHELINE_SIZE
+#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE
+#else
+#define ARCH_DMA_MINALIGN 32
+#endif
+
+#endif /* _ASM_LOONGARCH_CACHE_H */
diff --git a/arch/loongarch/include/asm/config.h b/arch/loongarch/include/asm/config.h
new file mode 100644
index 000000000000..23eb49847e7b
--- /dev/null
+++ b/arch/loongarch/include/asm/config.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef _ASM_CONFIG_H_
+#define _ASM_CONFIG_H_
+
+/* Dummy header */
+
+#endif
diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h
new file mode 100644
index 000000000000..e65ef273ed46
--- /dev/null
+++ b/arch/loongarch/include/asm/cpu.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * cpu.h: Values of the PRID register used to match up
+ * various LoongArch CPU types.
+ *
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef _ASM_CPU_H
+#define _ASM_CPU_H
+
+#include <linux/bitops.h>
+
+/*
+ * As described in LoongArch specs from Loongson Technology, the PRID register
+ * (CPUCFG.00) has the following layout:
+ *
+ * +---------------+----------------+------------+--------------------+
+ * | Reserved | Company ID | Series ID | Product ID |
+ * +---------------+----------------+------------+--------------------+
+ * 31 24 23 16 15 12 11 0
+ */
+
+/*
+ * Assigned Company values for bits 23:16 of the PRID register.
+ */
+
+#define PRID_COMP_MASK 0xff0000
+
+#define PRID_COMP_LOONGSON 0x140000
+
+/*
+ * Assigned Series ID values for bits 15:12 of the PRID register. In order
+ * to detect a certain CPU type exactly eventually additional registers may
+ * need to be examined.
+ */
+
+#define PRID_SERIES_MASK 0xf000
+
+#define PRID_SERIES_LA132 0x8000 /* Loongson 32bit */
+#define PRID_SERIES_LA264 0xa000 /* Loongson 64bit, 2-issue */
+#define PRID_SERIES_LA364 0xb000 /* Loongson 64bit, 3-issue */
+#define PRID_SERIES_LA464 0xc000 /* Loongson 64bit, 4-issue */
+#define PRID_SERIES_LA664 0xd000 /* Loongson 64bit, 6-issue */
+
+/*
+ * Particular Product ID values for bits 11:0 of the PRID register.
+ */
+
+#define PRID_PRODUCT_MASK 0x0fff
+
+
+/*
+ * ISA Level encodings
+ *
+ */
+
+#define LOONGARCH_CPU_ISA_LA32R 0x00000001
+#define LOONGARCH_CPU_ISA_LA32S 0x00000002
+#define LOONGARCH_CPU_ISA_LA64 0x00000004
+
+#define LOONGARCH_CPU_ISA_32BIT (LOONGARCH_CPU_ISA_LA32R | LOONGARCH_CPU_ISA_LA32S)
+#define LOONGARCH_CPU_ISA_64BIT LOONGARCH_CPU_ISA_LA64
+
+/*
+ * CPU Option encodings
+ */
+#define CPU_FEATURE_CPUCFG 0 /* CPU has CPUCFG */
+#define CPU_FEATURE_LAM 1 /* CPU has Atomic instructions */
+#define CPU_FEATURE_UAL 2 /* CPU supports unaligned access */
+#define CPU_FEATURE_FPU 3 /* CPU has FPU */
+#define CPU_FEATURE_LSX 4 /* CPU has LSX (128-bit SIMD) */
+#define CPU_FEATURE_LASX 5 /* CPU has LASX (256-bit SIMD) */
+#define CPU_FEATURE_CRC32 6 /* CPU has CRC32 instructions */
+#define CPU_FEATURE_COMPLEX 7 /* CPU has Complex instructions */
+#define CPU_FEATURE_CRYPTO 8 /* CPU has Crypto instructions */
+#define CPU_FEATURE_LVZ 9 /* CPU has Virtualization extension */
+#define CPU_FEATURE_LBT_X86 10 /* CPU has X86 Binary Translation */
+#define CPU_FEATURE_LBT_ARM 11 /* CPU has ARM Binary Translation */
+#define CPU_FEATURE_LBT_MIPS 12 /* CPU has MIPS Binary Translation */
+#define CPU_FEATURE_TLB 13 /* CPU has TLB */
+#define CPU_FEATURE_CSR 14 /* CPU has CSR */
+#define CPU_FEATURE_WATCH 15 /* CPU has watchpoint registers */
+#define CPU_FEATURE_VINT 16 /* CPU has vectored interrupts */
+#define CPU_FEATURE_CSRIPI 17 /* CPU has CSR-IPI */
+#define CPU_FEATURE_EXTIOI 18 /* CPU has EXT-IOI */
+#define CPU_FEATURE_PREFETCH 19 /* CPU has prefetch instructions */
+#define CPU_FEATURE_PMP 20 /* CPU has perfermance counter */
+#define CPU_FEATURE_SCALEFREQ 21 /* CPU supports cpufreq scaling */
+#define CPU_FEATURE_FLATMODE 22 /* CPU has flat mode */
+#define CPU_FEATURE_EIODECODE 23 /* CPU has EXTIOI interrupt pin decode mode */
+#define CPU_FEATURE_GUESTID 24 /* CPU has GuestID feature */
+#define CPU_FEATURE_HYPERVISOR 25 /* CPU has hypervisor (running in VM) */
+#define CPU_FEATURE_PTW 26 /* CPU has hardware page table walker */
+
+#define LOONGARCH_CPU_CPUCFG BIT_ULL(CPU_FEATURE_CPUCFG)
+#define LOONGARCH_CPU_LAM BIT_ULL(CPU_FEATURE_LAM)
+#define LOONGARCH_CPU_UAL BIT_ULL(CPU_FEATURE_UAL)
+#define LOONGARCH_CPU_FPU BIT_ULL(CPU_FEATURE_FPU)
+#define LOONGARCH_CPU_LSX BIT_ULL(CPU_FEATURE_LSX)
+#define LOONGARCH_CPU_LASX BIT_ULL(CPU_FEATURE_LASX)
+#define LOONGARCH_CPU_CRC32 BIT_ULL(CPU_FEATURE_CRC32)
+#define LOONGARCH_CPU_COMPLEX BIT_ULL(CPU_FEATURE_COMPLEX)
+#define LOONGARCH_CPU_CRYPTO BIT_ULL(CPU_FEATURE_CRYPTO)
+#define LOONGARCH_CPU_LVZ BIT_ULL(CPU_FEATURE_LVZ)
+#define LOONGARCH_CPU_LBT_X86 BIT_ULL(CPU_FEATURE_LBT_X86)
+#define LOONGARCH_CPU_LBT_ARM BIT_ULL(CPU_FEATURE_LBT_ARM)
+#define LOONGARCH_CPU_LBT_MIPS BIT_ULL(CPU_FEATURE_LBT_MIPS)
+#define LOONGARCH_CPU_TLB BIT_ULL(CPU_FEATURE_TLB)
+#define LOONGARCH_CPU_CSR BIT_ULL(CPU_FEATURE_CSR)
+#define LOONGARCH_CPU_WATCH BIT_ULL(CPU_FEATURE_WATCH)
+#define LOONGARCH_CPU_VINT BIT_ULL(CPU_FEATURE_VINT)
+#define LOONGARCH_CPU_CSRIPI BIT_ULL(CPU_FEATURE_CSRIPI)
+#define LOONGARCH_CPU_EXTIOI BIT_ULL(CPU_FEATURE_EXTIOI)
+#define LOONGARCH_CPU_PREFETCH BIT_ULL(CPU_FEATURE_PREFETCH)
+#define LOONGARCH_CPU_PMP BIT_ULL(CPU_FEATURE_PMP)
+#define LOONGARCH_CPU_SCALEFREQ BIT_ULL(CPU_FEATURE_SCALEFREQ)
+#define LOONGARCH_CPU_FLATMODE BIT_ULL(CPU_FEATURE_FLATMODE)
+#define LOONGARCH_CPU_EIODECODE BIT_ULL(CPU_FEATURE_EIODECODE)
+#define LOONGARCH_CPU_GUESTID BIT_ULL(CPU_FEATURE_GUESTID)
+#define LOONGARCH_CPU_HYPERVISOR BIT_ULL(CPU_FEATURE_HYPERVISOR)
+#define LOONGARCH_CPU_PTW BIT_ULL(CPU_FEATURE_PTW)
+
+#endif /* _ASM_CPU_H */
diff --git a/arch/loongarch/include/asm/dma-mapping.h b/arch/loongarch/include/asm/dma-mapping.h
new file mode 100644
index 000000000000..87088815b955
--- /dev/null
+++ b/arch/loongarch/include/asm/dma-mapping.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_DMA_MAPPING_H
+#define __ASM_LOONGARCH_DMA_MAPPING_H
+
+#include <linux/types.h>
+#include <asm/cache.h>
+#include <cpu_func.h>
+#include <linux/dma-direction.h>
+#include <malloc.h>
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+ /* TODO:For non-coherent system allocate from DMW1 */
+ *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
+ return (void *)*handle;
+}
+
+static inline void dma_free_coherent(void *addr)
+{
+ free(addr);
+}
+
+#endif
diff --git a/arch/loongarch/include/asm/global_data.h b/arch/loongarch/include/asm/global_data.h
new file mode 100644
index 000000000000..2a9a525e2f37
--- /dev/null
+++ b/arch/loongarch/include/asm/global_data.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_GBL_DATA_H
+#define __ASM_GBL_DATA_H
+
+#include <linux/types.h>
+#include <asm/u-boot.h>
+#include <compiler.h>
+
+/* Architecture-specific global data */
+struct arch_global_data {
+#if CONFIG_IS_ENABLED(ACPI)
+ ulong table_start; /* Start address of ACPI tables */
+ ulong table_end; /* End address of ACPI tables */
+ ulong table_start_high; /* Start address of high ACPI tables */
+ ulong table_end_high; /* End address of high ACPI tables */
+#endif
+#ifdef CONFIG_SMBIOS
+ ulong smbios_start; /* Start address of SMBIOS table */
+#endif
+};
+
+#include <asm-generic/global_data.h>
+
+/* GD is stored in u0 (per CPU pointer) */
+#define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("$r21")
+
+static inline void set_gd(volatile gd_t *gd_ptr)
+{
+#ifdef CONFIG_64BIT
+ asm volatile("ld.d $r21, %0\n" : : "m"(gd_ptr));
+#else
+ asm volatile("ld.w $r21, %0\n" : : "m"(gd_ptr));
+#endif
+}
+
+#endif /* __ASM_GBL_DATA_H */
diff --git a/arch/loongarch/include/asm/gpio.h b/arch/loongarch/include/asm/gpio.h
new file mode 100644
index 000000000000..b2508fc2e9f8
--- /dev/null
+++ b/arch/loongarch/include/asm/gpio.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_GPIO_H
+#define __ASM_GPIO_H
+
+#include <asm-generic/gpio.h>
+
+#endif
diff --git a/arch/loongarch/include/asm/io.h b/arch/loongarch/include/asm/io.h
new file mode 100644
index 000000000000..1fd6ccd9f9a7
--- /dev/null
+++ b/arch/loongarch/include/asm/io.h
@@ -0,0 +1,399 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_IO_H
+#define __ASM_LOONGARCH_IO_H
+
+#include <linux/types.h>
+#include <asm/addrspace.h>
+#include <asm/barrier.h>
+#include <asm/byteorder.h>
+
+static inline void sync(void)
+{
+}
+
+#define __arch_getb(a) (*(volatile unsigned char *)(a))
+#define __arch_getw(a) (*(volatile unsigned short *)(a))
+#define __arch_getl(a) (*(volatile unsigned int *)(a))
+#define __arch_getq(a) (*(volatile unsigned long long *)(a))
+
+#define __arch_putb(v, a) (*(volatile unsigned char *)(a) = (v))
+#define __arch_putw(v, a) (*(volatile unsigned short *)(a) = (v))
+#define __arch_putl(v, a) (*(volatile unsigned int *)(a) = (v))
+#define __arch_putq(v, a) (*(volatile unsigned long long *)(a) = (v))
+
+#define __raw_writeb(v, a) __arch_putb(v, a)
+#define __raw_writew(v, a) __arch_putw(v, a)
+#define __raw_writel(v, a) __arch_putl(v, a)
+#define __raw_writeq(v, a) __arch_putq(v, a)
+
+#define __raw_readb(a) __arch_getb(a)
+#define __raw_readw(a) __arch_getw(a)
+#define __raw_readl(a) __arch_getl(a)
+#define __raw_readq(a) __arch_getq(a)
+
+/* adding for cadence_qspi_apb.c */
+#define memcpy_fromio(a, c, l) memcpy((a), (c), (l))
+#define memcpy_toio(c, a, l) memcpy((c), (a), (l))
+
+#define dmb() mb()
+#define __iormb() rmb()
+#define __iowmb() wmb()
+
+static inline void writeb(u8 val, volatile void __iomem *addr)
+{
+ __iowmb();
+ __arch_putb(val, addr);
+}
+
+static inline void writew(u16 val, volatile void __iomem *addr)
+{
+ __iowmb();
+ __arch_putw(val, addr);
+}
+
+static inline void writel(u32 val, volatile void __iomem *addr)
+{
+ __iowmb();
+ __arch_putl(val, addr);
+}
+
+static inline void writeq(u64 val, volatile void __iomem *addr)
+{
+ __iowmb();
+ __arch_putq(val, addr);
+}
+
+static inline u8 readb(const volatile void __iomem *addr)
+{
+ u8 val;
+
+ val = __arch_getb(addr);
+ __iormb();
+ return val;
+}
+
+static inline u16 readw(const volatile void __iomem *addr)
+{
+ u16 val;
+
+ val = __arch_getw(addr);
+ __iormb();
+ return val;
+}
+
+static inline u32 readl(const volatile void __iomem *addr)
+{
+ u32 val;
+
+ val = __arch_getl(addr);
+ __iormb();
+ return val;
+}
+
+static inline u64 readq(const volatile void __iomem *addr)
+{
+ u64 val;
+
+ val = __arch_getq(addr);
+ __iormb();
+ return val;
+}
+
+/*
+ * The compiler seems to be incapable of optimising constants
+ * properly. Spell it out to the compiler in some cases.
+ * These are only valid for small values of "off" (< 1<<12)
+ */
+#define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off)
+#define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off)
+#define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off)
+
+#define __raw_base_readb(base, off) __arch_base_getb(base, off)
+#define __raw_base_readw(base, off) __arch_base_getw(base, off)
+#define __raw_base_readl(base, off) __arch_base_getl(base, off)
+
+#define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a)
+#define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a))
+
+#define out_le32(a, v) out_arch(l, le32, a, v)
+#define out_le16(a, v) out_arch(w, le16, a, v)
+
+#define in_le32(a) in_arch(l, le32, a)
+#define in_le16(a) in_arch(w, le16, a)
+
+#define out_be32(a, v) out_arch(l, be32, a, v)
+#define out_be16(a, v) out_arch(w, be16, a, v)
+
+#define in_be32(a) in_arch(l, be32, a)
+#define in_be16(a) in_arch(w, be16, a)
+
+#define out_8(a, v) __raw_writeb(v, a)
+#define in_8(a) __raw_readb(a)
+
+/*
+ * Clear and set bits in one shot. These macros can be used to clear and
+ * set multiple bits in a register using a single call. These macros can
+ * also be used to set a multiple-bit bit pattern using a mask, by
+ * specifying the mask in the 'clear' parameter and the new bit pattern
+ * in the 'set' parameter.
+ */
+
+#define clrbits(type, addr, clear) \
+ out_##type((addr), in_##type(addr) & ~(clear))
+
+#define setbits(type, addr, set) \
+ out_##type((addr), in_##type(addr) | (set))
+
+#define clrsetbits(type, addr, clear, set) \
+ out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
+
+#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
+#define setbits_be32(addr, set) setbits(be32, addr, set)
+#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
+
+#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
+#define setbits_le32(addr, set) setbits(le32, addr, set)
+#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
+
+#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
+#define setbits_be16(addr, set) setbits(be16, addr, set)
+#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
+
+#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
+#define setbits_le16(addr, set) setbits(le16, addr, set)
+#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
+
+#define clrbits_8(addr, clear) clrbits(8, addr, clear)
+#define setbits_8(addr, set) setbits(8, addr, set)
+#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
+
+
+/*
+ * IO port access primitives
+ * -------------------------
+ *
+ * LoongArch doesn't have special IO access instructions just like
+ * ARM and RISC-V all IO is either memory mapped or IOCSR mapped.
+ *
+ * Note that these are defined to perform little endian accesses
+ * only. Their primary purpose is to access PCI and ISA peripherals.
+ */
+#ifdef __io
+#define outb(v, p) __raw_writeb(v, __io(p))
+#define outw(v, p) __raw_writew(cpu_to_le16(v), __io(p))
+#define outl(v, p) __raw_writel(cpu_to_le32(v), __io(p))
+
+#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; })
+#define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
+#define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
+
+#define outsb(p, d, l) writesb(__io(p), d, l)
+#define outsw(p, d, l) writesw(__io(p), d, l)
+#define outsl(p, d, l) writesl(__io(p), d, l)
+
+#define insb(p, d, l) readsb(__io(p), d, l)
+#define insw(p, d, l) readsw(__io(p), d, l)
+#define insl(p, d, l) readsl(__io(p), d, l)
+
+static inline void readsb(const volatile void __iomem *addr, void *data,
+ unsigned int bytelen)
+{
+ unsigned char *ptr;
+ unsigned char *ptr2;
+
+ ptr = (unsigned char *)addr;
+ ptr2 = (unsigned char *)data;
+
+ while (bytelen) {
+ *ptr2 = *ptr;
+ ptr2++;
+ bytelen--;
+ }
+}
+
+static inline void readsw(const volatile void __iomem *addr, void *data,
+ unsigned int wordlen)
+{
+ unsigned short *ptr;
+ unsigned short *ptr2;
+
+ ptr = (unsigned short *)addr;
+ ptr2 = (unsigned short *)data;
+
+ while (wordlen) {
+ *ptr2 = *ptr;
+ ptr2++;
+ wordlen--;
+ }
+}
+
+static inline void readsl(const volatile void __iomem *addr, void *data,
+ unsigned int longlen)
+{
+ unsigned int *ptr;
+ unsigned int *ptr2;
+
+ ptr = (unsigned int *)addr;
+ ptr2 = (unsigned int *)data;
+
+ while (longlen) {
+ *ptr2 = *ptr;
+ ptr2++;
+ longlen--;
+ }
+}
+
+static inline void writesb(volatile void __iomem *addr, const void *data,
+ unsigned int bytelen)
+{
+ unsigned char *ptr;
+ unsigned char *ptr2;
+
+ ptr = (unsigned char *)addr;
+ ptr2 = (unsigned char *)data;
+
+ while (bytelen) {
+ *ptr = *ptr2;
+ ptr2++;
+ bytelen--;
+ }
+}
+
+static inline void writesw(volatile void __iomem *addr, const void *data,
+ unsigned int wordlen)
+{
+ unsigned short *ptr;
+ unsigned short *ptr2;
+
+ ptr = (unsigned short *)addr;
+ ptr2 = (unsigned short *)data;
+
+ while (wordlen) {
+ *ptr = *ptr2;
+ ptr2++;
+ wordlen--;
+ }
+}
+
+static inline void writesl(volatile void __iomem *addr, const void *data,
+ unsigned int longlen)
+{
+ unsigned int *ptr;
+ unsigned int *ptr2;
+
+ ptr = (unsigned int *)addr;
+ ptr2 = (unsigned int *)data;
+
+ while (longlen) {
+ *ptr = *ptr2;
+ ptr2++;
+ longlen--;
+ }
+}
+
+#define readsb readsb
+#define readsw readsw
+#define readsl readsl
+#define writesb writesb
+#define writesw writesw
+#define writesl writesl
+
+#endif
+
+#define outb_p(val, port) outb((val), (port))
+#define outw_p(val, port) outw((val), (port))
+#define outl_p(val, port) outl((val), (port))
+#define inb_p(port) inb((port))
+#define inw_p(port) inw((port))
+#define inl_p(port) inl((port))
+
+#define outsb_p(port, from, len) outsb(port, from, len)
+#define outsw_p(port, from, len) outsw(port, from, len)
+#define outsl_p(port, from, len) outsl(port, from, len)
+#define insb_p(port, to, len) insb(port, to, len)
+#define insw_p(port, to, len) insw(port, to, len)
+#define insl_p(port, to, len) insl(port, to, len)
+
+/*
+ * Unordered I/O memory access primitives. These are even more relaxed than
+ * the relaxed versions, as they don't even order accesses between successive
+ * operations to the I/O regions.
+ */
+#define readb_cpu(c) ({ u8 __r = __raw_readb(c); __r; })
+#define readw_cpu(c) ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; })
+#define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
+
+#define writeb_cpu(v, c) ((void)__raw_writeb((v), (c)))
+#define writew_cpu(v, c) ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
+#define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
+
+#ifdef CONFIG_64BIT
+#define readq_cpu(c) ({ u64 __r = le64_to_cpu((__force __le64)__raw_readq(c)); __r; })
+#define writeq_cpu(v, c) ((void)__raw_writeq((__force u64)cpu_to_le64(v), (c)))
+#endif
+
+/*
+ * Relaxed I/O memory access primitives. These follow the Device memory
+ * ordering rules but do not guarantee any ordering relative to Normal memory
+ * accesses. These are defined to order the indicated access (either a read or
+ * write) with all other I/O memory accesses to the same peripheral. Since the
+ * platform specification defines that all I/O regions are strongly ordered on
+ * channel 0, no explicit fences are required to enforce this ordering.
+ */
+/* FIXME: These are now the same as asm-generic */
+#define __io_rbr() do {} while (0)
+#define __io_rar() do {} while (0)
+#define __io_rbw() do {} while (0)
+#define __io_raw() do {} while (0)
+
+#define readb_relaxed(c) ({ u8 __v; __io_rbr(); __v = readb_cpu(c); __io_rar(); __v; })
+#define readw_relaxed(c) ({ u16 __v; __io_rbr(); __v = readw_cpu(c); __io_rar(); __v; })
+#define readl_relaxed(c) ({ u32 __v; __io_rbr(); __v = readl_cpu(c); __io_rar(); __v; })
+
+#define writeb_relaxed(v, c) ({ __io_rbw(); writeb_cpu((v), (c)); __io_raw(); })
+#define writew_relaxed(v, c) ({ __io_rbw(); writew_cpu((v), (c)); __io_raw(); })
+#define writel_relaxed(v, c) ({ __io_rbw(); writel_cpu((v), (c)); __io_raw(); })
+
+#ifdef CONFIG_64BIT
+#define readq_relaxed(c) ({ u64 __v; __io_rbr(); __v = readq_cpu(c); __io_rar(); __v; })
+#define writeq_relaxed(v, c) ({ __io_rbw(); writeq_cpu((v), (c)); __io_raw(); })
+#endif
+
+static inline phys_addr_t virt_to_phys(volatile const void *address)
+{
+ return TO_PHYS((unsigned long)address);
+}
+#define virt_to_phys virt_to_phys
+
+static inline void *phys_to_virt(phys_addr_t address)
+{
+ /* Assume it is always for U-Boot memory access */
+ return (void *)(address);
+}
+#define phys_to_virt phys_to_virt
+
+/* These two needs to be uncaced */
+#define MAP_NOCACHE 1
+#define MAP_WRCOMBINE MAP_NOCACHE
+
+static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
+ unsigned long flags)
+{
+ if (flags == MAP_NOCACHE)
+ return (void *)TO_UNCACHE(paddr);
+
+ /* Assume cached mapping is always for U-Boot memory access */
+ return (void *)(paddr);
+}
+#define map_physmem map_physmem
+
+#include <asm-generic/io.h>
+
+#endif /* __ASM_LOONGARCH_IO_H */
diff --git a/arch/loongarch/include/asm/linkage.h b/arch/loongarch/include/asm/linkage.h
new file mode 100644
index 000000000000..f004bdd8efe3
--- /dev/null
+++ b/arch/loongarch/include/asm/linkage.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LINKAGE_H
+#define __ASM_LINKAGE_H
+
+/* Dummy header */
+
+#endif
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
new file mode 100644
index 000000000000..72625b38c9a7
--- /dev/null
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -0,0 +1,1467 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+#ifndef _ASM_LOONGARCH_H
+#define _ASM_LOONGARCH_H
+
+#include <linux/bitops.h>
+#include <linux/const.h>
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#include <larchintrin.h>
+
+/* CPUCFG */
+#define read_cpucfg(reg) __cpucfg(reg)
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * Configure language
+ */
+#ifdef __ASSEMBLY__
+#define _ULCAST_
+#define _U64CAST_
+#else
+#define _ULCAST_ (unsigned long)
+#define _U64CAST_ (u64)
+#endif
+
+#ifdef __ASSEMBLY__
+
+/* LoongArch Registers */
+#define REG_ZERO 0x0
+#define REG_RA 0x1
+#define REG_TP 0x2
+#define REG_SP 0x3
+#define REG_A0 0x4 /* Reused as V0 for return value */
+#define REG_A1 0x5 /* Reused as V1 for return value */
+#define REG_A2 0x6
+#define REG_A3 0x7
+#define REG_A4 0x8
+#define REG_A5 0x9
+#define REG_A6 0xa
+#define REG_A7 0xb
+#define REG_T0 0xc
+#define REG_T1 0xd
+#define REG_T2 0xe
+#define REG_T3 0xf
+#define REG_T4 0x10
+#define REG_T5 0x11
+#define REG_T6 0x12
+#define REG_T7 0x13
+#define REG_T8 0x14
+#define REG_U0 0x15 /* Kernel uses it as percpu base */
+#define REG_FP 0x16
+#define REG_S0 0x17
+#define REG_S1 0x18
+#define REG_S2 0x19
+#define REG_S3 0x1a
+#define REG_S4 0x1b
+#define REG_S5 0x1c
+#define REG_S6 0x1d
+#define REG_S7 0x1e
+#define REG_S8 0x1f
+
+#endif /* __ASSEMBLY__ */
+
+/* Bit fields for CPUCFG registers */
+#define LOONGARCH_CPUCFG0 0x0
+#define CPUCFG0_PRID GENMASK(31, 0)
+
+#define LOONGARCH_CPUCFG1 0x1
+#define CPUCFG1_ISGR32 BIT(0)
+#define CPUCFG1_ISGR64 BIT(1)
+#define CPUCFG1_PAGING BIT(2)
+#define CPUCFG1_IOCSR BIT(3)
+#define CPUCFG1_PABITS GENMASK(11, 4)
+#define CPUCFG1_VABITS GENMASK(19, 12)
+#define CPUCFG1_UAL BIT(20)
+#define CPUCFG1_RI BIT(21)
+#define CPUCFG1_EP BIT(22)
+#define CPUCFG1_RPLV BIT(23)
+#define CPUCFG1_HUGEPG BIT(24)
+#define CPUCFG1_CRC32 BIT(25)
+#define CPUCFG1_MSGINT BIT(26)
+
+#define LOONGARCH_CPUCFG2 0x2
+#define CPUCFG2_FP BIT(0)
+#define CPUCFG2_FPSP BIT(1)
+#define CPUCFG2_FPDP BIT(2)
+#define CPUCFG2_FPVERS GENMASK(5, 3)
+#define CPUCFG2_LSX BIT(6)
+#define CPUCFG2_LASX BIT(7)
+#define CPUCFG2_COMPLEX BIT(8)
+#define CPUCFG2_CRYPTO BIT(9)
+#define CPUCFG2_LVZP BIT(10)
+#define CPUCFG2_LVZVER GENMASK(13, 11)
+#define CPUCFG2_LLFTP BIT(14)
+#define CPUCFG2_LLFTPREV GENMASK(17, 15)
+#define CPUCFG2_X86BT BIT(18)
+#define CPUCFG2_ARMBT BIT(19)
+#define CPUCFG2_MIPSBT BIT(20)
+#define CPUCFG2_LSPW BIT(21)
+#define CPUCFG2_LAM BIT(22)
+#define CPUCFG2_PTW BIT(24)
+
+#define LOONGARCH_CPUCFG3 0x3
+#define CPUCFG3_CCDMA BIT(0)
+#define CPUCFG3_SFB BIT(1)
+#define CPUCFG3_UCACC BIT(2)
+#define CPUCFG3_LLEXC BIT(3)
+#define CPUCFG3_SCDLY BIT(4)
+#define CPUCFG3_LLDBAR BIT(5)
+#define CPUCFG3_ITLBT BIT(6)
+#define CPUCFG3_ICACHET BIT(7)
+#define CPUCFG3_SPW_LVL GENMASK(10, 8)
+#define CPUCFG3_SPW_HG_HF BIT(11)
+#define CPUCFG3_RVA BIT(12)
+#define CPUCFG3_RVAMAX GENMASK(16, 13)
+
+#define LOONGARCH_CPUCFG4 0x4
+#define CPUCFG4_CCFREQ GENMASK(31, 0)
+
+#define LOONGARCH_CPUCFG5 0x5
+#define CPUCFG5_CCMUL GENMASK(15, 0)
+#define CPUCFG5_CCDIV GENMASK(31, 16)
+
+#define LOONGARCH_CPUCFG6 0x6
+#define CPUCFG6_PMP BIT(0)
+#define CPUCFG6_PAMVER GENMASK(3, 1)
+#define CPUCFG6_PMNUM GENMASK(7, 4)
+#define CPUCFG6_PMBITS GENMASK(13, 8)
+#define CPUCFG6_UPM BIT(14)
+
+#define LOONGARCH_CPUCFG16 0x10
+#define CPUCFG16_L1_IUPRE BIT(0)
+#define CPUCFG16_L1_IUUNIFY BIT(1)
+#define CPUCFG16_L1_DPRE BIT(2)
+#define CPUCFG16_L2_IUPRE BIT(3)
+#define CPUCFG16_L2_IUUNIFY BIT(4)
+#define CPUCFG16_L2_IUPRIV BIT(5)
+#define CPUCFG16_L2_IUINCL BIT(6)
+#define CPUCFG16_L2_DPRE BIT(7)
+#define CPUCFG16_L2_DPRIV BIT(8)
+#define CPUCFG16_L2_DINCL BIT(9)
+#define CPUCFG16_L3_IUPRE BIT(10)
+#define CPUCFG16_L3_IUUNIFY BIT(11)
+#define CPUCFG16_L3_IUPRIV BIT(12)
+#define CPUCFG16_L3_IUINCL BIT(13)
+#define CPUCFG16_L3_DPRE BIT(14)
+#define CPUCFG16_L3_DPRIV BIT(15)
+#define CPUCFG16_L3_DINCL BIT(16)
+
+#define LOONGARCH_CPUCFG17 0x11
+#define LOONGARCH_CPUCFG18 0x12
+#define LOONGARCH_CPUCFG19 0x13
+#define LOONGARCH_CPUCFG20 0x14
+#define CPUCFG_CACHE_WAYS_M GENMASK(15, 0)
+#define CPUCFG_CACHE_SETS_M GENMASK(23, 16)
+#define CPUCFG_CACHE_LSIZE_M GENMASK(30, 24)
+#define CPUCFG_CACHE_WAYS 0
+#define CPUCFG_CACHE_SETS 16
+#define CPUCFG_CACHE_LSIZE 24
+
+#define LOONGARCH_CPUCFG48 0x30
+#define CPUCFG48_MCSR_LCK BIT(0)
+#define CPUCFG48_NAP_EN BIT(1)
+#define CPUCFG48_VFPU_CG BIT(2)
+#define CPUCFG48_RAM_CG BIT(3)
+
+/*
+ * CPUCFG index area: 0x40000000 -- 0x400000ff
+ * SW emulation for KVM hypervirsor
+ */
+#define CPUCFG_KVM_BASE 0x40000000
+#define CPUCFG_KVM_SIZE 0x100
+
+#define CPUCFG_KVM_SIG (CPUCFG_KVM_BASE + 0)
+#define KVM_SIGNATURE "KVM\0"
+#define CPUCFG_KVM_FEATURE (CPUCFG_KVM_BASE + 4)
+#define KVM_FEATURE_IPI BIT(1)
+
+#ifndef __ASSEMBLY__
+
+/* CSR */
+#define csr_read32(reg) __csrrd_w(reg)
+#define csr_read64(reg) __csrrd_d(reg)
+#define csr_write32(val, reg) __csrwr_w(val, reg)
+#define csr_write64(val, reg) __csrwr_d(val, reg)
+#define csr_xchg32(val, mask, reg) __csrxchg_w(val, mask, reg)
+#define csr_xchg64(val, mask, reg) __csrxchg_d(val, mask, reg)
+
+/* IOCSR */
+#define iocsr_read32(reg) __iocsrrd_w(reg)
+#define iocsr_read64(reg) __iocsrrd_d(reg)
+#define iocsr_write32(val, reg) __iocsrwr_w(val, reg)
+#define iocsr_write64(val, reg) __iocsrwr_d(val, reg)
+
+#endif /* !__ASSEMBLY__ */
+
+/* CSR register number */
+
+/* Basic CSR registers */
+#define LOONGARCH_CSR_CRMD 0x0 /* Current mode info */
+#define CSR_CRMD_WE_SHIFT 9
+#define CSR_CRMD_WE (_ULCAST_(0x1) << CSR_CRMD_WE_SHIFT)
+#define CSR_CRMD_DACM_SHIFT 7
+#define CSR_CRMD_DACM_WIDTH 2
+#define CSR_CRMD_DACM (_ULCAST_(0x3) << CSR_CRMD_DACM_SHIFT)
+#define CSR_CRMD_DACF_SHIFT 5
+#define CSR_CRMD_DACF_WIDTH 2
+#define CSR_CRMD_DACF (_ULCAST_(0x3) << CSR_CRMD_DACF_SHIFT)
+#define CSR_CRMD_PG_SHIFT 4
+#define CSR_CRMD_PG (_ULCAST_(0x1) << CSR_CRMD_PG_SHIFT)
+#define CSR_CRMD_DA_SHIFT 3
+#define CSR_CRMD_DA (_ULCAST_(0x1) << CSR_CRMD_DA_SHIFT)
+#define CSR_CRMD_IE_SHIFT 2
+#define CSR_CRMD_IE (_ULCAST_(0x1) << CSR_CRMD_IE_SHIFT)
+#define CSR_CRMD_PLV_SHIFT 0
+#define CSR_CRMD_PLV_WIDTH 2
+#define CSR_CRMD_PLV (_ULCAST_(0x3) << CSR_CRMD_PLV_SHIFT)
+
+#define PLV_KERN 0
+#define PLV_USER 3
+#define PLV_MASK 0x3
+
+#define LOONGARCH_CSR_PRMD 0x1 /* Prev-exception mode info */
+#define CSR_PRMD_PWE_SHIFT 3
+#define CSR_PRMD_PWE (_ULCAST_(0x1) << CSR_PRMD_PWE_SHIFT)
+#define CSR_PRMD_PIE_SHIFT 2
+#define CSR_PRMD_PIE (_ULCAST_(0x1) << CSR_PRMD_PIE_SHIFT)
+#define CSR_PRMD_PPLV_SHIFT 0
+#define CSR_PRMD_PPLV_WIDTH 2
+#define CSR_PRMD_PPLV (_ULCAST_(0x3) << CSR_PRMD_PPLV_SHIFT)
+
+#define LOONGARCH_CSR_EUEN 0x2 /* Extended unit enable */
+#define CSR_EUEN_LBTEN_SHIFT 3
+#define CSR_EUEN_LBTEN (_ULCAST_(0x1) << CSR_EUEN_LBTEN_SHIFT)
+#define CSR_EUEN_LASXEN_SHIFT 2
+#define CSR_EUEN_LASXEN (_ULCAST_(0x1) << CSR_EUEN_LASXEN_SHIFT)
+#define CSR_EUEN_LSXEN_SHIFT 1
+#define CSR_EUEN_LSXEN (_ULCAST_(0x1) << CSR_EUEN_LSXEN_SHIFT)
+#define CSR_EUEN_FPEN_SHIFT 0
+#define CSR_EUEN_FPEN (_ULCAST_(0x1) << CSR_EUEN_FPEN_SHIFT)
+
+#define LOONGARCH_CSR_MISC 0x3 /* Misc config */
+
+#define LOONGARCH_CSR_ECFG 0x4 /* Exception config */
+#define CSR_ECFG_VS_SHIFT 16
+#define CSR_ECFG_VS_WIDTH 3
+#define CSR_ECFG_VS_SHIFT_END (CSR_ECFG_VS_SHIFT + CSR_ECFG_VS_WIDTH - 1)
+#define CSR_ECFG_VS (_ULCAST_(0x7) << CSR_ECFG_VS_SHIFT)
+#define CSR_ECFG_IM_SHIFT 0
+#define CSR_ECFG_IM_WIDTH 14
+#define CSR_ECFG_IM (_ULCAST_(0x3fff) << CSR_ECFG_IM_SHIFT)
+
+#define LOONGARCH_CSR_ESTAT 0x5 /* Exception status */
+#define CSR_ESTAT_ESUBCODE_SHIFT 22
+#define CSR_ESTAT_ESUBCODE_WIDTH 9
+#define CSR_ESTAT_ESUBCODE (_ULCAST_(0x1ff) << CSR_ESTAT_ESUBCODE_SHIFT)
+#define CSR_ESTAT_EXC_SHIFT 16
+#define CSR_ESTAT_EXC_WIDTH 6
+#define CSR_ESTAT_EXC (_ULCAST_(0x3f) << CSR_ESTAT_EXC_SHIFT)
+#define CSR_ESTAT_IS_SHIFT 0
+#define CSR_ESTAT_IS_WIDTH 14
+#define CSR_ESTAT_IS (_ULCAST_(0x3fff) << CSR_ESTAT_IS_SHIFT)
+
+#define LOONGARCH_CSR_ERA 0x6 /* ERA */
+
+#define LOONGARCH_CSR_BADV 0x7 /* Bad virtual address */
+
+#define LOONGARCH_CSR_BADI 0x8 /* Bad instruction */
+
+#define LOONGARCH_CSR_EENTRY 0xc /* Exception entry */
+
+/* TLB related CSR registers */
+#define LOONGARCH_CSR_TLBIDX 0x10 /* TLB Index, EHINV, PageSize, NP */
+#define CSR_TLBIDX_EHINV_SHIFT 31
+#define CSR_TLBIDX_EHINV (_ULCAST_(1) << CSR_TLBIDX_EHINV_SHIFT)
+#define CSR_TLBIDX_PS_SHIFT 24
+#define CSR_TLBIDX_PS_WIDTH 6
+#define CSR_TLBIDX_PS (_ULCAST_(0x3f) << CSR_TLBIDX_PS_SHIFT)
+#define CSR_TLBIDX_IDX_SHIFT 0
+#define CSR_TLBIDX_IDX_WIDTH 12
+#define CSR_TLBIDX_IDX (_ULCAST_(0xfff) << CSR_TLBIDX_IDX_SHIFT)
+#define CSR_TLBIDX_SIZEM 0x3f000000
+#define CSR_TLBIDX_SIZE CSR_TLBIDX_PS_SHIFT
+#define CSR_TLBIDX_IDXM 0xfff
+#define CSR_INVALID_ENTRY(e) (CSR_TLBIDX_EHINV | e)
+
+#define LOONGARCH_CSR_TLBEHI 0x11 /* TLB EntryHi */
+
+#define LOONGARCH_CSR_TLBELO0 0x12 /* TLB EntryLo0 */
+#define CSR_TLBLO0_RPLV_SHIFT 63
+#define CSR_TLBLO0_RPLV (_ULCAST_(0x1) << CSR_TLBLO0_RPLV_SHIFT)
+#define CSR_TLBLO0_NX_SHIFT 62
+#define CSR_TLBLO0_NX (_ULCAST_(0x1) << CSR_TLBLO0_NX_SHIFT)
+#define CSR_TLBLO0_NR_SHIFT 61
+#define CSR_TLBLO0_NR (_ULCAST_(0x1) << CSR_TLBLO0_NR_SHIFT)
+#define CSR_TLBLO0_PFN_SHIFT 12
+#define CSR_TLBLO0_PFN_WIDTH 36
+#define CSR_TLBLO0_PFN (_ULCAST_(0xfffffffff) << CSR_TLBLO0_PFN_SHIFT)
+#define CSR_TLBLO0_GLOBAL_SHIFT 6
+#define CSR_TLBLO0_GLOBAL (_ULCAST_(0x1) << CSR_TLBLO0_GLOBAL_SHIFT)
+#define CSR_TLBLO0_CCA_SHIFT 4
+#define CSR_TLBLO0_CCA_WIDTH 2
+#define CSR_TLBLO0_CCA (_ULCAST_(0x3) << CSR_TLBLO0_CCA_SHIFT)
+#define CSR_TLBLO0_PLV_SHIFT 2
+#define CSR_TLBLO0_PLV_WIDTH 2
+#define CSR_TLBLO0_PLV (_ULCAST_(0x3) << CSR_TLBLO0_PLV_SHIFT)
+#define CSR_TLBLO0_WE_SHIFT 1
+#define CSR_TLBLO0_WE (_ULCAST_(0x1) << CSR_TLBLO0_WE_SHIFT)
+#define CSR_TLBLO0_V_SHIFT 0
+#define CSR_TLBLO0_V (_ULCAST_(0x1) << CSR_TLBLO0_V_SHIFT)
+
+#define LOONGARCH_CSR_TLBELO1 0x13 /* TLB EntryLo1 */
+#define CSR_TLBLO1_RPLV_SHIFT 63
+#define CSR_TLBLO1_RPLV (_ULCAST_(0x1) << CSR_TLBLO1_RPLV_SHIFT)
+#define CSR_TLBLO1_NX_SHIFT 62
+#define CSR_TLBLO1_NX (_ULCAST_(0x1) << CSR_TLBLO1_NX_SHIFT)
+#define CSR_TLBLO1_NR_SHIFT 61
+#define CSR_TLBLO1_NR (_ULCAST_(0x1) << CSR_TLBLO1_NR_SHIFT)
+#define CSR_TLBLO1_PFN_SHIFT 12
+#define CSR_TLBLO1_PFN_WIDTH 36
+#define CSR_TLBLO1_PFN (_ULCAST_(0xfffffffff) << CSR_TLBLO1_PFN_SHIFT)
+#define CSR_TLBLO1_GLOBAL_SHIFT 6
+#define CSR_TLBLO1_GLOBAL (_ULCAST_(0x1) << CSR_TLBLO1_GLOBAL_SHIFT)
+#define CSR_TLBLO1_CCA_SHIFT 4
+#define CSR_TLBLO1_CCA_WIDTH 2
+#define CSR_TLBLO1_CCA (_ULCAST_(0x3) << CSR_TLBLO1_CCA_SHIFT)
+#define CSR_TLBLO1_PLV_SHIFT 2
+#define CSR_TLBLO1_PLV_WIDTH 2
+#define CSR_TLBLO1_PLV (_ULCAST_(0x3) << CSR_TLBLO1_PLV_SHIFT)
+#define CSR_TLBLO1_WE_SHIFT 1
+#define CSR_TLBLO1_WE (_ULCAST_(0x1) << CSR_TLBLO1_WE_SHIFT)
+#define CSR_TLBLO1_V_SHIFT 0
+#define CSR_TLBLO1_V (_ULCAST_(0x1) << CSR_TLBLO1_V_SHIFT)
+
+#define LOONGARCH_CSR_GTLBC 0x15 /* Guest TLB control */
+#define CSR_GTLBC_TGID_SHIFT 16
+#define CSR_GTLBC_TGID_WIDTH 8
+#define CSR_GTLBC_TGID_SHIFT_END (CSR_GTLBC_TGID_SHIFT + CSR_GTLBC_TGID_WIDTH - 1)
+#define CSR_GTLBC_TGID (_ULCAST_(0xff) << CSR_GTLBC_TGID_SHIFT)
+#define CSR_GTLBC_TOTI_SHIFT 13
+#define CSR_GTLBC_TOTI (_ULCAST_(0x1) << CSR_GTLBC_TOTI_SHIFT)
+#define CSR_GTLBC_USETGID_SHIFT 12
+#define CSR_GTLBC_USETGID (_ULCAST_(0x1) << CSR_GTLBC_USETGID_SHIFT)
+#define CSR_GTLBC_GMTLBSZ_SHIFT 0
+#define CSR_GTLBC_GMTLBSZ_WIDTH 6
+#define CSR_GTLBC_GMTLBSZ (_ULCAST_(0x3f) << CSR_GTLBC_GMTLBSZ_SHIFT)
+
+#define LOONGARCH_CSR_TRGP 0x16 /* TLBR read guest info */
+#define CSR_TRGP_RID_SHIFT 16
+#define CSR_TRGP_RID_WIDTH 8
+#define CSR_TRGP_RID (_ULCAST_(0xff) << CSR_TRGP_RID_SHIFT)
+#define CSR_TRGP_GTLB_SHIFT 0
+#define CSR_TRGP_GTLB (1 << CSR_TRGP_GTLB_SHIFT)
+
+#define LOONGARCH_CSR_ASID 0x18 /* ASID */
+#define CSR_ASID_BIT_SHIFT 16 /* ASIDBits */
+#define CSR_ASID_BIT_WIDTH 8
+#define CSR_ASID_BIT (_ULCAST_(0xff) << CSR_ASID_BIT_SHIFT)
+#define CSR_ASID_ASID_SHIFT 0
+#define CSR_ASID_ASID_WIDTH 10
+#define CSR_ASID_ASID (_ULCAST_(0x3ff) << CSR_ASID_ASID_SHIFT)
+
+#define LOONGARCH_CSR_PGDL 0x19 /* Page table base address when VA[VALEN-1] = 0 */
+
+#define LOONGARCH_CSR_PGDH 0x1a /* Page table base address when VA[VALEN-1] = 1 */
+
+#define LOONGARCH_CSR_PGD 0x1b /* Page table base */
+
+#define LOONGARCH_CSR_PWCTL0 0x1c /* PWCtl0 */
+#define CSR_PWCTL0_PTEW_SHIFT 30
+#define CSR_PWCTL0_PTEW_WIDTH 2
+#define CSR_PWCTL0_PTEW (_ULCAST_(0x3) << CSR_PWCTL0_PTEW_SHIFT)
+#define CSR_PWCTL0_DIR1WIDTH_SHIFT 25
+#define CSR_PWCTL0_DIR1WIDTH_WIDTH 5
+#define CSR_PWCTL0_DIR1WIDTH (_ULCAST_(0x1f) << CSR_PWCTL0_DIR1WIDTH_SHIFT)
+#define CSR_PWCTL0_DIR1BASE_SHIFT 20
+#define CSR_PWCTL0_DIR1BASE_WIDTH 5
+#define CSR_PWCTL0_DIR1BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR1BASE_SHIFT)
+#define CSR_PWCTL0_DIR0WIDTH_SHIFT 15
+#define CSR_PWCTL0_DIR0WIDTH_WIDTH 5
+#define CSR_PWCTL0_DIR0WIDTH (_ULCAST_(0x1f) << CSR_PWCTL0_DIR0WIDTH_SHIFT)
+#define CSR_PWCTL0_DIR0BASE_SHIFT 10
+#define CSR_PWCTL0_DIR0BASE_WIDTH 5
+#define CSR_PWCTL0_DIR0BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR0BASE_SHIFT)
+#define CSR_PWCTL0_PTWIDTH_SHIFT 5
+#define CSR_PWCTL0_PTWIDTH_WIDTH 5
+#define CSR_PWCTL0_PTWIDTH (_ULCAST_(0x1f) << CSR_PWCTL0_PTWIDTH_SHIFT)
+#define CSR_PWCTL0_PTBASE_SHIFT 0
+#define CSR_PWCTL0_PTBASE_WIDTH 5
+#define CSR_PWCTL0_PTBASE (_ULCAST_(0x1f) << CSR_PWCTL0_PTBASE_SHIFT)
+
+#define LOONGARCH_CSR_PWCTL1 0x1d /* PWCtl1 */
+#define CSR_PWCTL1_PTW_SHIFT 24
+#define CSR_PWCTL1_PTW_WIDTH 1
+#define CSR_PWCTL1_PTW (_ULCAST_(0x1) << CSR_PWCTL1_PTW_SHIFT)
+#define CSR_PWCTL1_DIR3WIDTH_SHIFT 18
+#define CSR_PWCTL1_DIR3WIDTH_WIDTH 5
+#define CSR_PWCTL1_DIR3WIDTH (_ULCAST_(0x1f) << CSR_PWCTL1_DIR3WIDTH_SHIFT)
+#define CSR_PWCTL1_DIR3BASE_SHIFT 12
+#define CSR_PWCTL1_DIR3BASE_WIDTH 5
+#define CSR_PWCTL1_DIR3BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR3BASE_SHIFT)
+#define CSR_PWCTL1_DIR2WIDTH_SHIFT 6
+#define CSR_PWCTL1_DIR2WIDTH_WIDTH 5
+#define CSR_PWCTL1_DIR2WIDTH (_ULCAST_(0x1f) << CSR_PWCTL1_DIR2WIDTH_SHIFT)
+#define CSR_PWCTL1_DIR2BASE_SHIFT 0
+#define CSR_PWCTL1_DIR2BASE_WIDTH 5
+#define CSR_PWCTL1_DIR2BASE (_ULCAST_(0x1f) << CSR_PWCTL0_DIR2BASE_SHIFT)
+
+#define LOONGARCH_CSR_STLBPGSIZE 0x1e
+#define CSR_STLBPGSIZE_PS_WIDTH 6
+#define CSR_STLBPGSIZE_PS (_ULCAST_(0x3f))
+
+#define LOONGARCH_CSR_RVACFG 0x1f
+#define CSR_RVACFG_RDVA_WIDTH 4
+#define CSR_RVACFG_RDVA (_ULCAST_(0xf))
+
+/* Config CSR registers */
+#define LOONGARCH_CSR_CPUID 0x20 /* CPU core id */
+#define CSR_CPUID_COREID_WIDTH 9
+#define CSR_CPUID_COREID _ULCAST_(0x1ff)
+
+#define LOONGARCH_CSR_PRCFG1 0x21 /* Config1 */
+#define CSR_CONF1_VSMAX_SHIFT 12
+#define CSR_CONF1_VSMAX_WIDTH 3
+#define CSR_CONF1_VSMAX (_ULCAST_(7) << CSR_CONF1_VSMAX_SHIFT)
+#define CSR_CONF1_TMRBITS_SHIFT 4
+#define CSR_CONF1_TMRBITS_WIDTH 8
+#define CSR_CONF1_TMRBITS (_ULCAST_(0xff) << CSR_CONF1_TMRBITS_SHIFT)
+#define CSR_CONF1_KSNUM_WIDTH 4
+#define CSR_CONF1_KSNUM _ULCAST_(0xf)
+
+#define LOONGARCH_CSR_PRCFG2 0x22 /* Config2 */
+#define CSR_CONF2_PGMASK_SUPP 0x3ffff000
+
+#define LOONGARCH_CSR_PRCFG3 0x23 /* Config3 */
+#define CSR_CONF3_STLBIDX_SHIFT 20
+#define CSR_CONF3_STLBIDX_WIDTH 6
+#define CSR_CONF3_STLBIDX (_ULCAST_(0x3f) << CSR_CONF3_STLBIDX_SHIFT)
+#define CSR_CONF3_STLBWAYS_SHIFT 12
+#define CSR_CONF3_STLBWAYS_WIDTH 8
+#define CSR_CONF3_STLBWAYS (_ULCAST_(0xff) << CSR_CONF3_STLBWAYS_SHIFT)
+#define CSR_CONF3_MTLBSIZE_SHIFT 4
+#define CSR_CONF3_MTLBSIZE_WIDTH 8
+#define CSR_CONF3_MTLBSIZE (_ULCAST_(0xff) << CSR_CONF3_MTLBSIZE_SHIFT)
+#define CSR_CONF3_TLBTYPE_SHIFT 0
+#define CSR_CONF3_TLBTYPE_WIDTH 4
+#define CSR_CONF3_TLBTYPE (_ULCAST_(0xf) << CSR_CONF3_TLBTYPE_SHIFT)
+
+/* KSave registers */
+#define LOONGARCH_CSR_KS0 0x30
+#define LOONGARCH_CSR_KS1 0x31
+#define LOONGARCH_CSR_KS2 0x32
+#define LOONGARCH_CSR_KS3 0x33
+#define LOONGARCH_CSR_KS4 0x34
+#define LOONGARCH_CSR_KS5 0x35
+#define LOONGARCH_CSR_KS6 0x36
+#define LOONGARCH_CSR_KS7 0x37
+#define LOONGARCH_CSR_KS8 0x38
+
+/* Exception allocated KS0, KS1 and KS2 statically */
+#define EXCEPTION_KS0 LOONGARCH_CSR_KS0
+#define EXCEPTION_KS1 LOONGARCH_CSR_KS1
+#define EXCEPTION_KS2 LOONGARCH_CSR_KS2
+#define EXC_KSAVE_MASK (1 << 0 | 1 << 1 | 1 << 2)
+
+/* Percpu-data base allocated KS3 statically */
+#define PERCPU_BASE_KS LOONGARCH_CSR_KS3
+#define PERCPU_KSAVE_MASK (1 << 3)
+
+/* KVM allocated KS4 and KS5 statically */
+#define KVM_VCPU_KS LOONGARCH_CSR_KS4
+#define KVM_TEMP_KS LOONGARCH_CSR_KS5
+#define KVM_KSAVE_MASK (1 << 4 | 1 << 5)
+
+/* Timer registers */
+#define LOONGARCH_CSR_TMID 0x40 /* Timer ID */
+
+#define LOONGARCH_CSR_TCFG 0x41 /* Timer config */
+#define CSR_TCFG_VAL_SHIFT 2
+#define CSR_TCFG_VAL_WIDTH 48
+#define CSR_TCFG_VAL (_ULCAST_(0x3fffffffffff) << CSR_TCFG_VAL_SHIFT)
+#define CSR_TCFG_PERIOD_SHIFT 1
+#define CSR_TCFG_PERIOD (_ULCAST_(0x1) << CSR_TCFG_PERIOD_SHIFT)
+#define CSR_TCFG_EN (_ULCAST_(0x1))
+
+#define LOONGARCH_CSR_TVAL 0x42 /* Timer value */
+
+#define LOONGARCH_CSR_CNTC 0x43 /* Timer offset */
+
+#define LOONGARCH_CSR_TINTCLR 0x44 /* Timer interrupt clear */
+#define CSR_TINTCLR_TI_SHIFT 0
+#define CSR_TINTCLR_TI (1 << CSR_TINTCLR_TI_SHIFT)
+
+/* Guest registers */
+#define LOONGARCH_CSR_GSTAT 0x50 /* Guest status */
+#define CSR_GSTAT_GID_SHIFT 16
+#define CSR_GSTAT_GID_WIDTH 8
+#define CSR_GSTAT_GID_SHIFT_END (CSR_GSTAT_GID_SHIFT + CSR_GSTAT_GID_WIDTH - 1)
+#define CSR_GSTAT_GID (_ULCAST_(0xff) << CSR_GSTAT_GID_SHIFT)
+#define CSR_GSTAT_GIDBIT_SHIFT 4
+#define CSR_GSTAT_GIDBIT_WIDTH 6
+#define CSR_GSTAT_GIDBIT (_ULCAST_(0x3f) << CSR_GSTAT_GIDBIT_SHIFT)
+#define CSR_GSTAT_PVM_SHIFT 1
+#define CSR_GSTAT_PVM (_ULCAST_(0x1) << CSR_GSTAT_PVM_SHIFT)
+#define CSR_GSTAT_VM_SHIFT 0
+#define CSR_GSTAT_VM (_ULCAST_(0x1) << CSR_GSTAT_VM_SHIFT)
+
+#define LOONGARCH_CSR_GCFG 0x51 /* Guest config */
+#define CSR_GCFG_GPERF_SHIFT 24
+#define CSR_GCFG_GPERF_WIDTH 3
+#define CSR_GCFG_GPERF (_ULCAST_(0x7) << CSR_GCFG_GPERF_SHIFT)
+#define CSR_GCFG_GCI_SHIFT 20
+#define CSR_GCFG_GCI_WIDTH 2
+#define CSR_GCFG_GCI (_ULCAST_(0x3) << CSR_GCFG_GCI_SHIFT)
+#define CSR_GCFG_GCI_ALL (_ULCAST_(0x0) << CSR_GCFG_GCI_SHIFT)
+#define CSR_GCFG_GCI_HIT (_ULCAST_(0x1) << CSR_GCFG_GCI_SHIFT)
+#define CSR_GCFG_GCI_SECURE (_ULCAST_(0x2) << CSR_GCFG_GCI_SHIFT)
+#define CSR_GCFG_GCIP_SHIFT 16
+#define CSR_GCFG_GCIP (_ULCAST_(0xf) << CSR_GCFG_GCIP_SHIFT)
+#define CSR_GCFG_GCIP_ALL (_ULCAST_(0x1) << CSR_GCFG_GCIP_SHIFT)
+#define CSR_GCFG_GCIP_HIT (_ULCAST_(0x1) << (CSR_GCFG_GCIP_SHIFT + 1))
+#define CSR_GCFG_GCIP_SECURE (_ULCAST_(0x1) << (CSR_GCFG_GCIP_SHIFT + 2))
+#define CSR_GCFG_TORU_SHIFT 15
+#define CSR_GCFG_TORU (_ULCAST_(0x1) << CSR_GCFG_TORU_SHIFT)
+#define CSR_GCFG_TORUP_SHIFT 14
+#define CSR_GCFG_TORUP (_ULCAST_(0x1) << CSR_GCFG_TORUP_SHIFT)
+#define CSR_GCFG_TOP_SHIFT 13
+#define CSR_GCFG_TOP (_ULCAST_(0x1) << CSR_GCFG_TOP_SHIFT)
+#define CSR_GCFG_TOPP_SHIFT 12
+#define CSR_GCFG_TOPP (_ULCAST_(0x1) << CSR_GCFG_TOPP_SHIFT)
+#define CSR_GCFG_TOE_SHIFT 11
+#define CSR_GCFG_TOE (_ULCAST_(0x1) << CSR_GCFG_TOE_SHIFT)
+#define CSR_GCFG_TOEP_SHIFT 10
+#define CSR_GCFG_TOEP (_ULCAST_(0x1) << CSR_GCFG_TOEP_SHIFT)
+#define CSR_GCFG_TIT_SHIFT 9
+#define CSR_GCFG_TIT (_ULCAST_(0x1) << CSR_GCFG_TIT_SHIFT)
+#define CSR_GCFG_TITP_SHIFT 8
+#define CSR_GCFG_TITP (_ULCAST_(0x1) << CSR_GCFG_TITP_SHIFT)
+#define CSR_GCFG_SIT_SHIFT 7
+#define CSR_GCFG_SIT (_ULCAST_(0x1) << CSR_GCFG_SIT_SHIFT)
+#define CSR_GCFG_SITP_SHIFT 6
+#define CSR_GCFG_SITP (_ULCAST_(0x1) << CSR_GCFG_SITP_SHIFT)
+#define CSR_GCFG_MATC_SHITF 4
+#define CSR_GCFG_MATC_WIDTH 2
+#define CSR_GCFG_MATC_MASK (_ULCAST_(0x3) << CSR_GCFG_MATC_SHITF)
+#define CSR_GCFG_MATC_GUEST (_ULCAST_(0x0) << CSR_GCFG_MATC_SHITF)
+#define CSR_GCFG_MATC_ROOT (_ULCAST_(0x1) << CSR_GCFG_MATC_SHITF)
+#define CSR_GCFG_MATC_NEST (_ULCAST_(0x2) << CSR_GCFG_MATC_SHITF)
+#define CSR_GCFG_MATP_NEST_SHIFT 2
+#define CSR_GCFG_MATP_NEST (_ULCAST_(0x1) << CSR_GCFG_MATP_NEST_SHIFT)
+#define CSR_GCFG_MATP_ROOT_SHIFT 1
+#define CSR_GCFG_MATP_ROOT (_ULCAST_(0x1) << CSR_GCFG_MATP_ROOT_SHIFT)
+#define CSR_GCFG_MATP_GUEST_SHIFT 0
+#define CSR_GCFG_MATP_GUEST (_ULCAST_(0x1) << CSR_GCFG_MATP_GUEST_SHIFT)
+
+#define LOONGARCH_CSR_GINTC 0x52 /* Guest interrupt control */
+#define CSR_GINTC_HC_SHIFT 16
+#define CSR_GINTC_HC_WIDTH 8
+#define CSR_GINTC_HC (_ULCAST_(0xff) << CSR_GINTC_HC_SHIFT)
+#define CSR_GINTC_PIP_SHIFT 8
+#define CSR_GINTC_PIP_WIDTH 8
+#define CSR_GINTC_PIP (_ULCAST_(0xff) << CSR_GINTC_PIP_SHIFT)
+#define CSR_GINTC_VIP_SHIFT 0
+#define CSR_GINTC_VIP_WIDTH 8
+#define CSR_GINTC_VIP (_ULCAST_(0xff))
+
+#define LOONGARCH_CSR_GCNTC 0x53 /* Guest timer offset */
+
+/* LLBCTL register */
+#define LOONGARCH_CSR_LLBCTL 0x60 /* LLBit control */
+#define CSR_LLBCTL_ROLLB_SHIFT 0
+#define CSR_LLBCTL_ROLLB (_ULCAST_(1) << CSR_LLBCTL_ROLLB_SHIFT)
+#define CSR_LLBCTL_WCLLB_SHIFT 1
+#define CSR_LLBCTL_WCLLB (_ULCAST_(1) << CSR_LLBCTL_WCLLB_SHIFT)
+#define CSR_LLBCTL_KLO_SHIFT 2
+#define CSR_LLBCTL_KLO (_ULCAST_(1) << CSR_LLBCTL_KLO_SHIFT)
+
+/* Implement dependent */
+#define LOONGARCH_CSR_IMPCTL1 0x80 /* Loongson config1 */
+#define CSR_MISPEC_SHIFT 20
+#define CSR_MISPEC_WIDTH 8
+#define CSR_MISPEC (_ULCAST_(0xff) << CSR_MISPEC_SHIFT)
+#define CSR_SSEN_SHIFT 18
+#define CSR_SSEN (_ULCAST_(1) << CSR_SSEN_SHIFT)
+#define CSR_SCRAND_SHIFT 17
+#define CSR_SCRAND (_ULCAST_(1) << CSR_SCRAND_SHIFT)
+#define CSR_LLEXCL_SHIFT 16
+#define CSR_LLEXCL (_ULCAST_(1) << CSR_LLEXCL_SHIFT)
+#define CSR_DISVC_SHIFT 15
+#define CSR_DISVC (_ULCAST_(1) << CSR_DISVC_SHIFT)
+#define CSR_VCLRU_SHIFT 14
+#define CSR_VCLRU (_ULCAST_(1) << CSR_VCLRU_SHIFT)
+#define CSR_DCLRU_SHIFT 13
+#define CSR_DCLRU (_ULCAST_(1) << CSR_DCLRU_SHIFT)
+#define CSR_FASTLDQ_SHIFT 12
+#define CSR_FASTLDQ (_ULCAST_(1) << CSR_FASTLDQ_SHIFT)
+#define CSR_USERCAC_SHIFT 11
+#define CSR_USERCAC (_ULCAST_(1) << CSR_USERCAC_SHIFT)
+#define CSR_ANTI_MISPEC_SHIFT 10
+#define CSR_ANTI_MISPEC (_ULCAST_(1) << CSR_ANTI_MISPEC_SHIFT)
+#define CSR_AUTO_FLUSHSFB_SHIFT 9
+#define CSR_AUTO_FLUSHSFB (_ULCAST_(1) << CSR_AUTO_FLUSHSFB_SHIFT)
+#define CSR_STFILL_SHIFT 8
+#define CSR_STFILL (_ULCAST_(1) << CSR_STFILL_SHIFT)
+#define CSR_LIFEP_SHIFT 7
+#define CSR_LIFEP (_ULCAST_(1) << CSR_LIFEP_SHIFT)
+#define CSR_LLSYNC_SHIFT 6
+#define CSR_LLSYNC (_ULCAST_(1) << CSR_LLSYNC_SHIFT)
+#define CSR_BRBTDIS_SHIFT 5
+#define CSR_BRBTDIS (_ULCAST_(1) << CSR_BRBTDIS_SHIFT)
+#define CSR_RASDIS_SHIFT 4
+#define CSR_RASDIS (_ULCAST_(1) << CSR_RASDIS_SHIFT)
+#define CSR_STPRE_SHIFT 2
+#define CSR_STPRE_WIDTH 2
+#define CSR_STPRE (_ULCAST_(3) << CSR_STPRE_SHIFT)
+#define CSR_INSTPRE_SHIFT 1
+#define CSR_INSTPRE (_ULCAST_(1) << CSR_INSTPRE_SHIFT)
+#define CSR_DATAPRE_SHIFT 0
+#define CSR_DATAPRE (_ULCAST_(1) << CSR_DATAPRE_SHIFT)
+
+#define LOONGARCH_CSR_IMPCTL2 0x81 /* Loongson config2 */
+#define CSR_FLUSH_MTLB_SHIFT 0
+#define CSR_FLUSH_MTLB (_ULCAST_(1) << CSR_FLUSH_MTLB_SHIFT)
+#define CSR_FLUSH_STLB_SHIFT 1
+#define CSR_FLUSH_STLB (_ULCAST_(1) << CSR_FLUSH_STLB_SHIFT)
+#define CSR_FLUSH_DTLB_SHIFT 2
+#define CSR_FLUSH_DTLB (_ULCAST_(1) << CSR_FLUSH_DTLB_SHIFT)
+#define CSR_FLUSH_ITLB_SHIFT 3
+#define CSR_FLUSH_ITLB (_ULCAST_(1) << CSR_FLUSH_ITLB_SHIFT)
+#define CSR_FLUSH_BTAC_SHIFT 4
+#define CSR_FLUSH_BTAC (_ULCAST_(1) << CSR_FLUSH_BTAC_SHIFT)
+
+#define LOONGARCH_CSR_GNMI 0x82
+
+/* TLB Refill registers */
+#define LOONGARCH_CSR_TLBRENTRY 0x88 /* TLB refill exception entry */
+#define LOONGARCH_CSR_TLBRBADV 0x89 /* TLB refill badvaddr */
+#define LOONGARCH_CSR_TLBRERA 0x8a /* TLB refill ERA */
+#define LOONGARCH_CSR_TLBRSAVE 0x8b /* KSave for TLB refill exception */
+#define LOONGARCH_CSR_TLBRELO0 0x8c /* TLB refill entrylo0 */
+#define LOONGARCH_CSR_TLBRELO1 0x8d /* TLB refill entrylo1 */
+#define LOONGARCH_CSR_TLBREHI 0x8e /* TLB refill entryhi */
+#define CSR_TLBREHI_PS_SHIFT 0
+#define CSR_TLBREHI_PS (_ULCAST_(0x3f) << CSR_TLBREHI_PS_SHIFT)
+#define LOONGARCH_CSR_TLBRPRMD 0x8f /* TLB refill mode info */
+
+/* Machine Error registers */
+#define LOONGARCH_CSR_MERRCTL 0x90 /* MERRCTL */
+#define LOONGARCH_CSR_MERRINFO1 0x91 /* MError info1 */
+#define LOONGARCH_CSR_MERRINFO2 0x92 /* MError info2 */
+#define LOONGARCH_CSR_MERRENTRY 0x93 /* MError exception entry */
+#define LOONGARCH_CSR_MERRERA 0x94 /* MError exception ERA */
+#define LOONGARCH_CSR_MERRSAVE 0x95 /* KSave for machine error exception */
+
+#define LOONGARCH_CSR_CTAG 0x98 /* TagLo + TagHi */
+
+#define LOONGARCH_CSR_PRID 0xc0
+
+/* Shadow MCSR : 0xc0 ~ 0xff */
+#define LOONGARCH_CSR_MCSR0 0xc0 /* CPUCFG0 and CPUCFG1 */
+#define MCSR0_INT_IMPL_SHIFT 58
+#define MCSR0_INT_IMPL 0
+#define MCSR0_IOCSR_BRD_SHIFT 57
+#define MCSR0_IOCSR_BRD (_ULCAST_(1) << MCSR0_IOCSR_BRD_SHIFT)
+#define MCSR0_HUGEPG_SHIFT 56
+#define MCSR0_HUGEPG (_ULCAST_(1) << MCSR0_HUGEPG_SHIFT)
+#define MCSR0_RPLMTLB_SHIFT 55
+#define MCSR0_RPLMTLB (_ULCAST_(1) << MCSR0_RPLMTLB_SHIFT)
+#define MCSR0_EP_SHIFT 54
+#define MCSR0_EP (_ULCAST_(1) << MCSR0_EP_SHIFT)
+#define MCSR0_RI_SHIFT 53
+#define MCSR0_RI (_ULCAST_(1) << MCSR0_RI_SHIFT)
+#define MCSR0_UAL_SHIFT 52
+#define MCSR0_UAL (_ULCAST_(1) << MCSR0_UAL_SHIFT)
+#define MCSR0_VABIT_SHIFT 44
+#define MCSR0_VABIT_WIDTH 8
+#define MCSR0_VABIT (_ULCAST_(0xff) << MCSR0_VABIT_SHIFT)
+#define VABIT_DEFAULT 0x2f
+#define MCSR0_PABIT_SHIFT 36
+#define MCSR0_PABIT_WIDTH 8
+#define MCSR0_PABIT (_ULCAST_(0xff) << MCSR0_PABIT_SHIFT)
+#define PABIT_DEFAULT 0x2f
+#define MCSR0_IOCSR_SHIFT 35
+#define MCSR0_IOCSR (_ULCAST_(1) << MCSR0_IOCSR_SHIFT)
+#define MCSR0_PAGING_SHIFT 34
+#define MCSR0_PAGING (_ULCAST_(1) << MCSR0_PAGING_SHIFT)
+#define MCSR0_GR64_SHIFT 33
+#define MCSR0_GR64 (_ULCAST_(1) << MCSR0_GR64_SHIFT)
+#define GR64_DEFAULT 1
+#define MCSR0_GR32_SHIFT 32
+#define MCSR0_GR32 (_ULCAST_(1) << MCSR0_GR32_SHIFT)
+#define GR32_DEFAULT 0
+#define MCSR0_PRID_WIDTH 32
+#define MCSR0_PRID 0x14C010
+
+#define LOONGARCH_CSR_MCSR1 0xc1 /* CPUCFG2 and CPUCFG3 */
+#define MCSR1_HPFOLD_SHIFT 43
+#define MCSR1_HPFOLD (_ULCAST_(1) << MCSR1_HPFOLD_SHIFT)
+#define MCSR1_SPW_LVL_SHIFT 40
+#define MCSR1_SPW_LVL_WIDTH 3
+#define MCSR1_SPW_LVL (_ULCAST_(7) << MCSR1_SPW_LVL_SHIFT)
+#define MCSR1_ICACHET_SHIFT 39
+#define MCSR1_ICACHET (_ULCAST_(1) << MCSR1_ICACHET_SHIFT)
+#define MCSR1_ITLBT_SHIFT 38
+#define MCSR1_ITLBT (_ULCAST_(1) << MCSR1_ITLBT_SHIFT)
+#define MCSR1_LLDBAR_SHIFT 37
+#define MCSR1_LLDBAR (_ULCAST_(1) << MCSR1_LLDBAR_SHIFT)
+#define MCSR1_SCDLY_SHIFT 36
+#define MCSR1_SCDLY (_ULCAST_(1) << MCSR1_SCDLY_SHIFT)
+#define MCSR1_LLEXC_SHIFT 35
+#define MCSR1_LLEXC (_ULCAST_(1) << MCSR1_LLEXC_SHIFT)
+#define MCSR1_UCACC_SHIFT 34
+#define MCSR1_UCACC (_ULCAST_(1) << MCSR1_UCACC_SHIFT)
+#define MCSR1_SFB_SHIFT 33
+#define MCSR1_SFB (_ULCAST_(1) << MCSR1_SFB_SHIFT)
+#define MCSR1_CCDMA_SHIFT 32
+#define MCSR1_CCDMA (_ULCAST_(1) << MCSR1_CCDMA_SHIFT)
+#define MCSR1_LAMO_SHIFT 22
+#define MCSR1_LAMO (_ULCAST_(1) << MCSR1_LAMO_SHIFT)
+#define MCSR1_LSPW_SHIFT 21
+#define MCSR1_LSPW (_ULCAST_(1) << MCSR1_LSPW_SHIFT)
+#define MCSR1_MIPSBT_SHIFT 20
+#define MCSR1_MIPSBT (_ULCAST_(1) << MCSR1_MIPSBT_SHIFT)
+#define MCSR1_ARMBT_SHIFT 19
+#define MCSR1_ARMBT (_ULCAST_(1) << MCSR1_ARMBT_SHIFT)
+#define MCSR1_X86BT_SHIFT 18
+#define MCSR1_X86BT (_ULCAST_(1) << MCSR1_X86BT_SHIFT)
+#define MCSR1_LLFTPVERS_SHIFT 15
+#define MCSR1_LLFTPVERS_WIDTH 3
+#define MCSR1_LLFTPVERS (_ULCAST_(7) << MCSR1_LLFTPVERS_SHIFT)
+#define MCSR1_LLFTP_SHIFT 14
+#define MCSR1_LLFTP (_ULCAST_(1) << MCSR1_LLFTP_SHIFT)
+#define MCSR1_VZVERS_SHIFT 11
+#define MCSR1_VZVERS_WIDTH 3
+#define MCSR1_VZVERS (_ULCAST_(7) << MCSR1_VZVERS_SHIFT)
+#define MCSR1_VZ_SHIFT 10
+#define MCSR1_VZ (_ULCAST_(1) << MCSR1_VZ_SHIFT)
+#define MCSR1_CRYPTO_SHIFT 9
+#define MCSR1_CRYPTO (_ULCAST_(1) << MCSR1_CRYPTO_SHIFT)
+#define MCSR1_COMPLEX_SHIFT 8
+#define MCSR1_COMPLEX (_ULCAST_(1) << MCSR1_COMPLEX_SHIFT)
+#define MCSR1_LASX_SHIFT 7
+#define MCSR1_LASX (_ULCAST_(1) << MCSR1_LASX_SHIFT)
+#define MCSR1_LSX_SHIFT 6
+#define MCSR1_LSX (_ULCAST_(1) << MCSR1_LSX_SHIFT)
+#define MCSR1_FPVERS_SHIFT 3
+#define MCSR1_FPVERS_WIDTH 3
+#define MCSR1_FPVERS (_ULCAST_(7) << MCSR1_FPVERS_SHIFT)
+#define MCSR1_FPDP_SHIFT 2
+#define MCSR1_FPDP (_ULCAST_(1) << MCSR1_FPDP_SHIFT)
+#define MCSR1_FPSP_SHIFT 1
+#define MCSR1_FPSP (_ULCAST_(1) << MCSR1_FPSP_SHIFT)
+#define MCSR1_FP_SHIFT 0
+#define MCSR1_FP (_ULCAST_(1) << MCSR1_FP_SHIFT)
+
+#define LOONGARCH_CSR_MCSR2 0xc2 /* CPUCFG4 and CPUCFG5 */
+#define MCSR2_CCDIV_SHIFT 48
+#define MCSR2_CCDIV_WIDTH 16
+#define MCSR2_CCDIV (_ULCAST_(0xffff) << MCSR2_CCDIV_SHIFT)
+#define MCSR2_CCMUL_SHIFT 32
+#define MCSR2_CCMUL_WIDTH 16
+#define MCSR2_CCMUL (_ULCAST_(0xffff) << MCSR2_CCMUL_SHIFT)
+#define MCSR2_CCFREQ_WIDTH 32
+#define MCSR2_CCFREQ (_ULCAST_(0xffffffff))
+#define CCFREQ_DEFAULT 0x5f5e100 /* 100MHz */
+
+#define LOONGARCH_CSR_MCSR3 0xc3 /* CPUCFG6 */
+#define MCSR3_UPM_SHIFT 14
+#define MCSR3_UPM (_ULCAST_(1) << MCSR3_UPM_SHIFT)
+#define MCSR3_PMBITS_SHIFT 8
+#define MCSR3_PMBITS_WIDTH 6
+#define MCSR3_PMBITS (_ULCAST_(0x3f) << MCSR3_PMBITS_SHIFT)
+#define PMBITS_DEFAULT 0x40
+#define MCSR3_PMNUM_SHIFT 4
+#define MCSR3_PMNUM_WIDTH 4
+#define MCSR3_PMNUM (_ULCAST_(0xf) << MCSR3_PMNUM_SHIFT)
+#define MCSR3_PAMVER_SHIFT 1
+#define MCSR3_PAMVER_WIDTH 3
+#define MCSR3_PAMVER (_ULCAST_(0x7) << MCSR3_PAMVER_SHIFT)
+#define MCSR3_PMP_SHIFT 0
+#define MCSR3_PMP (_ULCAST_(1) << MCSR3_PMP_SHIFT)
+
+#define LOONGARCH_CSR_MCSR8 0xc8 /* CPUCFG16 and CPUCFG17 */
+#define MCSR8_L1I_SIZE_SHIFT 56
+#define MCSR8_L1I_SIZE_WIDTH 7
+#define MCSR8_L1I_SIZE (_ULCAST_(0x7f) << MCSR8_L1I_SIZE_SHIFT)
+#define MCSR8_L1I_IDX_SHIFT 48
+#define MCSR8_L1I_IDX_WIDTH 8
+#define MCSR8_L1I_IDX (_ULCAST_(0xff) << MCSR8_L1I_IDX_SHIFT)
+#define MCSR8_L1I_WAY_SHIFT 32
+#define MCSR8_L1I_WAY_WIDTH 16
+#define MCSR8_L1I_WAY (_ULCAST_(0xffff) << MCSR8_L1I_WAY_SHIFT)
+#define MCSR8_L3DINCL_SHIFT 16
+#define MCSR8_L3DINCL (_ULCAST_(1) << MCSR8_L3DINCL_SHIFT)
+#define MCSR8_L3DPRIV_SHIFT 15
+#define MCSR8_L3DPRIV (_ULCAST_(1) << MCSR8_L3DPRIV_SHIFT)
+#define MCSR8_L3DPRE_SHIFT 14
+#define MCSR8_L3DPRE (_ULCAST_(1) << MCSR8_L3DPRE_SHIFT)
+#define MCSR8_L3IUINCL_SHIFT 13
+#define MCSR8_L3IUINCL (_ULCAST_(1) << MCSR8_L3IUINCL_SHIFT)
+#define MCSR8_L3IUPRIV_SHIFT 12
+#define MCSR8_L3IUPRIV (_ULCAST_(1) << MCSR8_L3IUPRIV_SHIFT)
+#define MCSR8_L3IUUNIFY_SHIFT 11
+#define MCSR8_L3IUUNIFY (_ULCAST_(1) << MCSR8_L3IUUNIFY_SHIFT)
+#define MCSR8_L3IUPRE_SHIFT 10
+#define MCSR8_L3IUPRE (_ULCAST_(1) << MCSR8_L3IUPRE_SHIFT)
+#define MCSR8_L2DINCL_SHIFT 9
+#define MCSR8_L2DINCL (_ULCAST_(1) << MCSR8_L2DINCL_SHIFT)
+#define MCSR8_L2DPRIV_SHIFT 8
+#define MCSR8_L2DPRIV (_ULCAST_(1) << MCSR8_L2DPRIV_SHIFT)
+#define MCSR8_L2DPRE_SHIFT 7
+#define MCSR8_L2DPRE (_ULCAST_(1) << MCSR8_L2DPRE_SHIFT)
+#define MCSR8_L2IUINCL_SHIFT 6
+#define MCSR8_L2IUINCL (_ULCAST_(1) << MCSR8_L2IUINCL_SHIFT)
+#define MCSR8_L2IUPRIV_SHIFT 5
+#define MCSR8_L2IUPRIV (_ULCAST_(1) << MCSR8_L2IUPRIV_SHIFT)
+#define MCSR8_L2IUUNIFY_SHIFT 4
+#define MCSR8_L2IUUNIFY (_ULCAST_(1) << MCSR8_L2IUUNIFY_SHIFT)
+#define MCSR8_L2IUPRE_SHIFT 3
+#define MCSR8_L2IUPRE (_ULCAST_(1) << MCSR8_L2IUPRE_SHIFT)
+#define MCSR8_L1DPRE_SHIFT 2
+#define MCSR8_L1DPRE (_ULCAST_(1) << MCSR8_L1DPRE_SHIFT)
+#define MCSR8_L1IUUNIFY_SHIFT 1
+#define MCSR8_L1IUUNIFY (_ULCAST_(1) << MCSR8_L1IUUNIFY_SHIFT)
+#define MCSR8_L1IUPRE_SHIFT 0
+#define MCSR8_L1IUPRE (_ULCAST_(1) << MCSR8_L1IUPRE_SHIFT)
+
+#define LOONGARCH_CSR_MCSR9 0xc9 /* CPUCFG18 and CPUCFG19 */
+#define MCSR9_L2U_SIZE_SHIFT 56
+#define MCSR9_L2U_SIZE_WIDTH 7
+#define MCSR9_L2U_SIZE (_ULCAST_(0x7f) << MCSR9_L2U_SIZE_SHIFT)
+#define MCSR9_L2U_IDX_SHIFT 48
+#define MCSR9_L2U_IDX_WIDTH 8
+#define MCSR9_L2U_IDX (_ULCAST_(0xff) << MCSR9_IDX_LOG_SHIFT)
+#define MCSR9_L2U_WAY_SHIFT 32
+#define MCSR9_L2U_WAY_WIDTH 16
+#define MCSR9_L2U_WAY (_ULCAST_(0xffff) << MCSR9_L2U_WAY_SHIFT)
+#define MCSR9_L1D_SIZE_SHIFT 24
+#define MCSR9_L1D_SIZE_WIDTH 7
+#define MCSR9_L1D_SIZE (_ULCAST_(0x7f) << MCSR9_L1D_SIZE_SHIFT)
+#define MCSR9_L1D_IDX_SHIFT 16
+#define MCSR9_L1D_IDX_WIDTH 8
+#define MCSR9_L1D_IDX (_ULCAST_(0xff) << MCSR9_L1D_IDX_SHIFT)
+#define MCSR9_L1D_WAY_SHIFT 0
+#define MCSR9_L1D_WAY_WIDTH 16
+#define MCSR9_L1D_WAY (_ULCAST_(0xffff) << MCSR9_L1D_WAY_SHIFT)
+
+#define LOONGARCH_CSR_MCSR10 0xca /* CPUCFG20 */
+#define MCSR10_L3U_SIZE_SHIFT 24
+#define MCSR10_L3U_SIZE_WIDTH 7
+#define MCSR10_L3U_SIZE (_ULCAST_(0x7f) << MCSR10_L3U_SIZE_SHIFT)
+#define MCSR10_L3U_IDX_SHIFT 16
+#define MCSR10_L3U_IDX_WIDTH 8
+#define MCSR10_L3U_IDX (_ULCAST_(0xff) << MCSR10_L3U_IDX_SHIFT)
+#define MCSR10_L3U_WAY_SHIFT 0
+#define MCSR10_L3U_WAY_WIDTH 16
+#define MCSR10_L3U_WAY (_ULCAST_(0xffff) << MCSR10_L3U_WAY_SHIFT)
+
+#define LOONGARCH_CSR_MCSR24 0xf0 /* cpucfg48 */
+#define MCSR24_RAMCG_SHIFT 3
+#define MCSR24_RAMCG (_ULCAST_(1) << MCSR24_RAMCG_SHIFT)
+#define MCSR24_VFPUCG_SHIFT 2
+#define MCSR24_VFPUCG (_ULCAST_(1) << MCSR24_VFPUCG_SHIFT)
+#define MCSR24_NAPEN_SHIFT 1
+#define MCSR24_NAPEN (_ULCAST_(1) << MCSR24_NAPEN_SHIFT)
+#define MCSR24_MCSRLOCK_SHIFT 0
+#define MCSR24_MCSRLOCK (_ULCAST_(1) << MCSR24_MCSRLOCK_SHIFT)
+
+/* Uncached accelerate windows registers */
+#define LOONGARCH_CSR_UCAWIN 0x100
+#define LOONGARCH_CSR_UCAWIN0_LO 0x102
+#define LOONGARCH_CSR_UCAWIN0_HI 0x103
+#define LOONGARCH_CSR_UCAWIN1_LO 0x104
+#define LOONGARCH_CSR_UCAWIN1_HI 0x105
+#define LOONGARCH_CSR_UCAWIN2_LO 0x106
+#define LOONGARCH_CSR_UCAWIN2_HI 0x107
+#define LOONGARCH_CSR_UCAWIN3_LO 0x108
+#define LOONGARCH_CSR_UCAWIN3_HI 0x109
+
+/* Direct Map windows registers */
+#define LOONGARCH_CSR_DMWIN0 0x180 /* 64 direct map win0: MEM & IF */
+#define LOONGARCH_CSR_DMWIN1 0x181 /* 64 direct map win1: MEM & IF */
+#define LOONGARCH_CSR_DMWIN2 0x182 /* 64 direct map win2: MEM */
+#define LOONGARCH_CSR_DMWIN3 0x183 /* 64 direct map win3: MEM */
+
+/* Direct Map window 0/1 */
+#define CSR_DMW0_PLV0 _CONST64_(1 << 0)
+#define CSR_DMW0_VSEG _CONST64_(0x8000)
+#define CSR_DMW0_BASE (CSR_DMW0_VSEG << DMW_PABITS)
+#define CSR_DMW0_INIT (CSR_DMW0_BASE | CSR_DMW0_PLV0)
+
+#define CSR_DMW1_PLV0 _CONST64_(1 << 0)
+#define CSR_DMW1_MAT _CONST64_(1 << 4)
+#define CSR_DMW1_VSEG _CONST64_(0x9000)
+#define CSR_DMW1_BASE (CSR_DMW1_VSEG << DMW_PABITS)
+#define CSR_DMW1_INIT (CSR_DMW1_BASE | CSR_DMW1_MAT | CSR_DMW1_PLV0)
+
+/* Performance Counter registers */
+#define LOONGARCH_CSR_PERFCTRL0 0x200 /* 32 perf event 0 config */
+#define LOONGARCH_CSR_PERFCNTR0 0x201 /* 64 perf event 0 count value */
+#define LOONGARCH_CSR_PERFCTRL1 0x202 /* 32 perf event 1 config */
+#define LOONGARCH_CSR_PERFCNTR1 0x203 /* 64 perf event 1 count value */
+#define LOONGARCH_CSR_PERFCTRL2 0x204 /* 32 perf event 2 config */
+#define LOONGARCH_CSR_PERFCNTR2 0x205 /* 64 perf event 2 count value */
+#define LOONGARCH_CSR_PERFCTRL3 0x206 /* 32 perf event 3 config */
+#define LOONGARCH_CSR_PERFCNTR3 0x207 /* 64 perf event 3 count value */
+#define CSR_PERFCTRL_PLV0 (_ULCAST_(1) << 16)
+#define CSR_PERFCTRL_PLV1 (_ULCAST_(1) << 17)
+#define CSR_PERFCTRL_PLV2 (_ULCAST_(1) << 18)
+#define CSR_PERFCTRL_PLV3 (_ULCAST_(1) << 19)
+#define CSR_PERFCTRL_IE (_ULCAST_(1) << 20)
+#define CSR_PERFCTRL_EVENT 0x3ff
+
+/* Debug registers */
+#define LOONGARCH_CSR_MWPC 0x300 /* data breakpoint config */
+#define LOONGARCH_CSR_MWPS 0x301 /* data breakpoint status */
+
+#define LOONGARCH_CSR_DB0ADDR 0x310 /* data breakpoint 0 address */
+#define LOONGARCH_CSR_DB0MASK 0x311 /* data breakpoint 0 mask */
+#define LOONGARCH_CSR_DB0CTRL 0x312 /* data breakpoint 0 control */
+#define LOONGARCH_CSR_DB0ASID 0x313 /* data breakpoint 0 asid */
+
+#define LOONGARCH_CSR_DB1ADDR 0x318 /* data breakpoint 1 address */
+#define LOONGARCH_CSR_DB1MASK 0x319 /* data breakpoint 1 mask */
+#define LOONGARCH_CSR_DB1CTRL 0x31a /* data breakpoint 1 control */
+#define LOONGARCH_CSR_DB1ASID 0x31b /* data breakpoint 1 asid */
+
+#define LOONGARCH_CSR_DB2ADDR 0x320 /* data breakpoint 2 address */
+#define LOONGARCH_CSR_DB2MASK 0x321 /* data breakpoint 2 mask */
+#define LOONGARCH_CSR_DB2CTRL 0x322 /* data breakpoint 2 control */
+#define LOONGARCH_CSR_DB2ASID 0x323 /* data breakpoint 2 asid */
+
+#define LOONGARCH_CSR_DB3ADDR 0x328 /* data breakpoint 3 address */
+#define LOONGARCH_CSR_DB3MASK 0x329 /* data breakpoint 3 mask */
+#define LOONGARCH_CSR_DB3CTRL 0x32a /* data breakpoint 3 control */
+#define LOONGARCH_CSR_DB3ASID 0x32b /* data breakpoint 3 asid */
+
+#define LOONGARCH_CSR_DB4ADDR 0x330 /* data breakpoint 4 address */
+#define LOONGARCH_CSR_DB4MASK 0x331 /* data breakpoint 4 maks */
+#define LOONGARCH_CSR_DB4CTRL 0x332 /* data breakpoint 4 control */
+#define LOONGARCH_CSR_DB4ASID 0x333 /* data breakpoint 4 asid */
+
+#define LOONGARCH_CSR_DB5ADDR 0x338 /* data breakpoint 5 address */
+#define LOONGARCH_CSR_DB5MASK 0x339 /* data breakpoint 5 mask */
+#define LOONGARCH_CSR_DB5CTRL 0x33a /* data breakpoint 5 control */
+#define LOONGARCH_CSR_DB5ASID 0x33b /* data breakpoint 5 asid */
+
+#define LOONGARCH_CSR_DB6ADDR 0x340 /* data breakpoint 6 address */
+#define LOONGARCH_CSR_DB6MASK 0x341 /* data breakpoint 6 mask */
+#define LOONGARCH_CSR_DB6CTRL 0x342 /* data breakpoint 6 control */
+#define LOONGARCH_CSR_DB6ASID 0x343 /* data breakpoint 6 asid */
+
+#define LOONGARCH_CSR_DB7ADDR 0x348 /* data breakpoint 7 address */
+#define LOONGARCH_CSR_DB7MASK 0x349 /* data breakpoint 7 mask */
+#define LOONGARCH_CSR_DB7CTRL 0x34a /* data breakpoint 7 control */
+#define LOONGARCH_CSR_DB7ASID 0x34b /* data breakpoint 7 asid */
+
+#define LOONGARCH_CSR_FWPC 0x380 /* instruction breakpoint config */
+#define LOONGARCH_CSR_FWPS 0x381 /* instruction breakpoint status */
+
+#define LOONGARCH_CSR_IB0ADDR 0x390 /* inst breakpoint 0 address */
+#define LOONGARCH_CSR_IB0MASK 0x391 /* inst breakpoint 0 mask */
+#define LOONGARCH_CSR_IB0CTRL 0x392 /* inst breakpoint 0 control */
+#define LOONGARCH_CSR_IB0ASID 0x393 /* inst breakpoint 0 asid */
+
+#define LOONGARCH_CSR_IB1ADDR 0x398 /* inst breakpoint 1 address */
+#define LOONGARCH_CSR_IB1MASK 0x399 /* inst breakpoint 1 mask */
+#define LOONGARCH_CSR_IB1CTRL 0x39a /* inst breakpoint 1 control */
+#define LOONGARCH_CSR_IB1ASID 0x39b /* inst breakpoint 1 asid */
+
+#define LOONGARCH_CSR_IB2ADDR 0x3a0 /* inst breakpoint 2 address */
+#define LOONGARCH_CSR_IB2MASK 0x3a1 /* inst breakpoint 2 mask */
+#define LOONGARCH_CSR_IB2CTRL 0x3a2 /* inst breakpoint 2 control */
+#define LOONGARCH_CSR_IB2ASID 0x3a3 /* inst breakpoint 2 asid */
+
+#define LOONGARCH_CSR_IB3ADDR 0x3a8 /* inst breakpoint 3 address */
+#define LOONGARCH_CSR_IB3MASK 0x3a9 /* breakpoint 3 mask */
+#define LOONGARCH_CSR_IB3CTRL 0x3aa /* inst breakpoint 3 control */
+#define LOONGARCH_CSR_IB3ASID 0x3ab /* inst breakpoint 3 asid */
+
+#define LOONGARCH_CSR_IB4ADDR 0x3b0 /* inst breakpoint 4 address */
+#define LOONGARCH_CSR_IB4MASK 0x3b1 /* inst breakpoint 4 mask */
+#define LOONGARCH_CSR_IB4CTRL 0x3b2 /* inst breakpoint 4 control */
+#define LOONGARCH_CSR_IB4ASID 0x3b3 /* inst breakpoint 4 asid */
+
+#define LOONGARCH_CSR_IB5ADDR 0x3b8 /* inst breakpoint 5 address */
+#define LOONGARCH_CSR_IB5MASK 0x3b9 /* inst breakpoint 5 mask */
+#define LOONGARCH_CSR_IB5CTRL 0x3ba /* inst breakpoint 5 control */
+#define LOONGARCH_CSR_IB5ASID 0x3bb /* inst breakpoint 5 asid */
+
+#define LOONGARCH_CSR_IB6ADDR 0x3c0 /* inst breakpoint 6 address */
+#define LOONGARCH_CSR_IB6MASK 0x3c1 /* inst breakpoint 6 mask */
+#define LOONGARCH_CSR_IB6CTRL 0x3c2 /* inst breakpoint 6 control */
+#define LOONGARCH_CSR_IB6ASID 0x3c3 /* inst breakpoint 6 asid */
+
+#define LOONGARCH_CSR_IB7ADDR 0x3c8 /* inst breakpoint 7 address */
+#define LOONGARCH_CSR_IB7MASK 0x3c9 /* inst breakpoint 7 mask */
+#define LOONGARCH_CSR_IB7CTRL 0x3ca /* inst breakpoint 7 control */
+#define LOONGARCH_CSR_IB7ASID 0x3cb /* inst breakpoint 7 asid */
+
+#define LOONGARCH_CSR_DEBUG 0x500 /* debug config */
+#define LOONGARCH_CSR_DERA 0x501 /* debug era */
+#define LOONGARCH_CSR_DESAVE 0x502 /* debug save */
+
+#define CSR_FWPC_SKIP_SHIFT 16
+#define CSR_FWPC_SKIP (_ULCAST_(1) << CSR_FWPC_SKIP_SHIFT)
+
+/*
+ * CSR_ECFG IM
+ */
+#define ECFG0_IM 0x00001fff
+#define ECFGB_SIP0 0
+#define ECFGF_SIP0 (_ULCAST_(1) << ECFGB_SIP0)
+#define ECFGB_SIP1 1
+#define ECFGF_SIP1 (_ULCAST_(1) << ECFGB_SIP1)
+#define ECFGB_IP0 2
+#define ECFGF_IP0 (_ULCAST_(1) << ECFGB_IP0)
+#define ECFGB_IP1 3
+#define ECFGF_IP1 (_ULCAST_(1) << ECFGB_IP1)
+#define ECFGB_IP2 4
+#define ECFGF_IP2 (_ULCAST_(1) << ECFGB_IP2)
+#define ECFGB_IP3 5
+#define ECFGF_IP3 (_ULCAST_(1) << ECFGB_IP3)
+#define ECFGB_IP4 6
+#define ECFGF_IP4 (_ULCAST_(1) << ECFGB_IP4)
+#define ECFGB_IP5 7
+#define ECFGF_IP5 (_ULCAST_(1) << ECFGB_IP5)
+#define ECFGB_IP6 8
+#define ECFGF_IP6 (_ULCAST_(1) << ECFGB_IP6)
+#define ECFGB_IP7 9
+#define ECFGF_IP7 (_ULCAST_(1) << ECFGB_IP7)
+#define ECFGB_PMC 10
+#define ECFGF_PMC (_ULCAST_(1) << ECFGB_PMC)
+#define ECFGB_TIMER 11
+#define ECFGF_TIMER (_ULCAST_(1) << ECFGB_TIMER)
+#define ECFGB_IPI 12
+#define ECFGF_IPI (_ULCAST_(1) << ECFGB_IPI)
+#define ECFGF(hwirq) (_ULCAST_(1) << hwirq)
+
+#define ESTATF_IP 0x00003fff
+
+#define LOONGARCH_IOCSR_FEATURES 0x8
+#define IOCSRF_TEMP BIT_ULL(0)
+#define IOCSRF_NODECNT BIT_ULL(1)
+#define IOCSRF_MSI BIT_ULL(2)
+#define IOCSRF_EXTIOI BIT_ULL(3)
+#define IOCSRF_CSRIPI BIT_ULL(4)
+#define IOCSRF_FREQCSR BIT_ULL(5)
+#define IOCSRF_FREQSCALE BIT_ULL(6)
+#define IOCSRF_DVFSV1 BIT_ULL(7)
+#define IOCSRF_EIODECODE BIT_ULL(9)
+#define IOCSRF_FLATMODE BIT_ULL(10)
+#define IOCSRF_VM BIT_ULL(11)
+
+#define LOONGARCH_IOCSR_VENDOR 0x10
+
+#define LOONGARCH_IOCSR_CPUNAME 0x20
+
+#define LOONGARCH_IOCSR_NODECNT 0x408
+
+#define LOONGARCH_IOCSR_MISC_FUNC 0x420
+#define IOCSR_MISC_FUNC_TIMER_RESET BIT_ULL(21)
+#define IOCSR_MISC_FUNC_EXT_IOI_EN BIT_ULL(48)
+
+#define LOONGARCH_IOCSR_CPUTEMP 0x428
+
+/* PerCore CSR, only accessible by local cores */
+#define LOONGARCH_IOCSR_IPI_STATUS 0x1000
+#define LOONGARCH_IOCSR_IPI_EN 0x1004
+#define LOONGARCH_IOCSR_IPI_SET 0x1008
+#define LOONGARCH_IOCSR_IPI_CLEAR 0x100c
+#define LOONGARCH_IOCSR_MBUF0 0x1020
+#define LOONGARCH_IOCSR_MBUF1 0x1028
+#define LOONGARCH_IOCSR_MBUF2 0x1030
+#define LOONGARCH_IOCSR_MBUF3 0x1038
+
+#define LOONGARCH_IOCSR_IPI_SEND 0x1040
+#define IOCSR_IPI_SEND_IP_SHIFT 0
+#define IOCSR_IPI_SEND_CPU_SHIFT 16
+#define IOCSR_IPI_SEND_BLOCKING BIT(31)
+
+#define LOONGARCH_IOCSR_MBUF_SEND 0x1048
+#define IOCSR_MBUF_SEND_BLOCKING BIT_ULL(31)
+#define IOCSR_MBUF_SEND_BOX_SHIFT 2
+#define IOCSR_MBUF_SEND_BOX_LO(box) (box << 1)
+#define IOCSR_MBUF_SEND_BOX_HI(box) ((box << 1) + 1)
+#define IOCSR_MBUF_SEND_CPU_SHIFT 16
+#define IOCSR_MBUF_SEND_BUF_SHIFT 32
+#define IOCSR_MBUF_SEND_H32_MASK 0xFFFFFFFF00000000ULL
+
+#define LOONGARCH_IOCSR_ANY_SEND 0x1158
+#define IOCSR_ANY_SEND_BLOCKING BIT_ULL(31)
+#define IOCSR_ANY_SEND_CPU_SHIFT 16
+#define IOCSR_ANY_SEND_MASK_SHIFT 27
+#define IOCSR_ANY_SEND_BUF_SHIFT 32
+#define IOCSR_ANY_SEND_H32_MASK 0xFFFFFFFF00000000ULL
+
+/* Register offset and bit definition for CSR access */
+#define LOONGARCH_IOCSR_TIMER_CFG 0x1060
+#define LOONGARCH_IOCSR_TIMER_TICK 0x1070
+#define IOCSR_TIMER_CFG_RESERVED (_ULCAST_(1) << 63)
+#define IOCSR_TIMER_CFG_PERIODIC (_ULCAST_(1) << 62)
+#define IOCSR_TIMER_CFG_EN (_ULCAST_(1) << 61)
+#define IOCSR_TIMER_MASK 0x0ffffffffffffULL
+#define IOCSR_TIMER_INITVAL_RST (_ULCAST_(0xffff) << 48)
+
+#define LOONGARCH_IOCSR_EXTIOI_NODEMAP_BASE 0x14a0
+#define LOONGARCH_IOCSR_EXTIOI_IPMAP_BASE 0x14c0
+#define LOONGARCH_IOCSR_EXTIOI_EN_BASE 0x1600
+#define LOONGARCH_IOCSR_EXTIOI_BOUNCE_BASE 0x1680
+#define LOONGARCH_IOCSR_EXTIOI_ISR_BASE 0x1800
+#define LOONGARCH_IOCSR_EXTIOI_ROUTE_BASE 0x1c00
+#define IOCSR_EXTIOI_VECTOR_NUM 256
+
+#ifndef __ASSEMBLY__
+
+static __always_inline u64 drdtime(void)
+{
+ u64 val = 0;
+
+ __asm__ __volatile__(
+ "rdtime.d %0, $zero\n\t"
+ : "=r"(val)
+ :
+ );
+ return val;
+}
+
+static __always_inline u32 rdtimeh(void)
+{
+ u32 val = 0;
+
+ __asm__ __volatile__(
+ "rdtimeh.w %0, $zero\n\t"
+ : "=r"(val)
+ :
+ );
+ return val;
+}
+
+static __always_inline u32 rdtimel(void)
+{
+ u32 val = 0;
+
+ __asm__ __volatile__(
+ "rdtimel.w %0, $zero\n\t"
+ : "=r"(val)
+ :
+ );
+ return val;
+}
+
+static inline unsigned int get_csr_cpuid(void)
+{
+ return csr_read32(LOONGARCH_CSR_CPUID);
+}
+
+static inline void csr_any_send(unsigned int addr, unsigned int data,
+ unsigned int data_mask, unsigned int cpu)
+{
+ uint64_t val = 0;
+
+ val = IOCSR_ANY_SEND_BLOCKING | addr;
+ val |= (cpu << IOCSR_ANY_SEND_CPU_SHIFT);
+ val |= (data_mask << IOCSR_ANY_SEND_MASK_SHIFT);
+ val |= ((uint64_t)data << IOCSR_ANY_SEND_BUF_SHIFT);
+ iocsr_write64(val, LOONGARCH_IOCSR_ANY_SEND);
+}
+
+static inline unsigned int read_csr_excode(void)
+{
+ return (csr_read32(LOONGARCH_CSR_ESTAT) & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;
+}
+
+static inline void write_csr_index(unsigned int idx)
+{
+ csr_xchg32(idx, CSR_TLBIDX_IDXM, LOONGARCH_CSR_TLBIDX);
+}
+
+static inline unsigned int read_csr_pagesize(void)
+{
+ return (csr_read32(LOONGARCH_CSR_TLBIDX) & CSR_TLBIDX_SIZEM) >> CSR_TLBIDX_SIZE;
+}
+
+static inline void write_csr_pagesize(unsigned int size)
+{
+ csr_xchg32(size << CSR_TLBIDX_SIZE, CSR_TLBIDX_SIZEM, LOONGARCH_CSR_TLBIDX);
+}
+
+static inline unsigned int read_csr_tlbrefill_pagesize(void)
+{
+ return (csr_read64(LOONGARCH_CSR_TLBREHI) & CSR_TLBREHI_PS) >> CSR_TLBREHI_PS_SHIFT;
+}
+
+static inline void write_csr_tlbrefill_pagesize(unsigned int size)
+{
+ csr_xchg64(size << CSR_TLBREHI_PS_SHIFT, CSR_TLBREHI_PS, LOONGARCH_CSR_TLBREHI);
+}
+
+#define read_csr_asid() csr_read32(LOONGARCH_CSR_ASID)
+#define write_csr_asid(val) csr_write32(val, LOONGARCH_CSR_ASID)
+#define read_csr_entryhi() csr_read64(LOONGARCH_CSR_TLBEHI)
+#define write_csr_entryhi(val) csr_write64(val, LOONGARCH_CSR_TLBEHI)
+#define read_csr_entrylo0() csr_read64(LOONGARCH_CSR_TLBELO0)
+#define write_csr_entrylo0(val) csr_write64(val, LOONGARCH_CSR_TLBELO0)
+#define read_csr_entrylo1() csr_read64(LOONGARCH_CSR_TLBELO1)
+#define write_csr_entrylo1(val) csr_write64(val, LOONGARCH_CSR_TLBELO1)
+#define read_csr_ecfg() csr_read32(LOONGARCH_CSR_ECFG)
+#define write_csr_ecfg(val) csr_write32(val, LOONGARCH_CSR_ECFG)
+#define read_csr_estat() csr_read32(LOONGARCH_CSR_ESTAT)
+#define write_csr_estat(val) csr_write32(val, LOONGARCH_CSR_ESTAT)
+#define read_csr_tlbidx() csr_read32(LOONGARCH_CSR_TLBIDX)
+#define write_csr_tlbidx(val) csr_write32(val, LOONGARCH_CSR_TLBIDX)
+#define read_csr_euen() csr_read32(LOONGARCH_CSR_EUEN)
+#define write_csr_euen(val) csr_write32(val, LOONGARCH_CSR_EUEN)
+#define read_csr_cpuid() csr_read32(LOONGARCH_CSR_CPUID)
+#define read_csr_prcfg1() csr_read64(LOONGARCH_CSR_PRCFG1)
+#define write_csr_prcfg1(val) csr_write64(val, LOONGARCH_CSR_PRCFG1)
+#define read_csr_prcfg2() csr_read64(LOONGARCH_CSR_PRCFG2)
+#define write_csr_prcfg2(val) csr_write64(val, LOONGARCH_CSR_PRCFG2)
+#define read_csr_prcfg3() csr_read64(LOONGARCH_CSR_PRCFG3)
+#define write_csr_prcfg3(val) csr_write64(val, LOONGARCH_CSR_PRCFG3)
+#define read_csr_stlbpgsize() csr_read32(LOONGARCH_CSR_STLBPGSIZE)
+#define write_csr_stlbpgsize(val) csr_write32(val, LOONGARCH_CSR_STLBPGSIZE)
+#define read_csr_rvacfg() csr_read32(LOONGARCH_CSR_RVACFG)
+#define write_csr_rvacfg(val) csr_write32(val, LOONGARCH_CSR_RVACFG)
+#define write_csr_tintclear(val) csr_write32(val, LOONGARCH_CSR_TINTCLR)
+#define read_csr_impctl1() csr_read64(LOONGARCH_CSR_IMPCTL1)
+#define write_csr_impctl1(val) csr_write64(val, LOONGARCH_CSR_IMPCTL1)
+#define write_csr_impctl2(val) csr_write64(val, LOONGARCH_CSR_IMPCTL2)
+
+#define read_csr_perfctrl0() csr_read64(LOONGARCH_CSR_PERFCTRL0)
+#define read_csr_perfcntr0() csr_read64(LOONGARCH_CSR_PERFCNTR0)
+#define read_csr_perfctrl1() csr_read64(LOONGARCH_CSR_PERFCTRL1)
+#define read_csr_perfcntr1() csr_read64(LOONGARCH_CSR_PERFCNTR1)
+#define read_csr_perfctrl2() csr_read64(LOONGARCH_CSR_PERFCTRL2)
+#define read_csr_perfcntr2() csr_read64(LOONGARCH_CSR_PERFCNTR2)
+#define read_csr_perfctrl3() csr_read64(LOONGARCH_CSR_PERFCTRL3)
+#define read_csr_perfcntr3() csr_read64(LOONGARCH_CSR_PERFCNTR3)
+#define write_csr_perfctrl0(val) csr_write64(val, LOONGARCH_CSR_PERFCTRL0)
+#define write_csr_perfcntr0(val) csr_write64(val, LOONGARCH_CSR_PERFCNTR0)
+#define write_csr_perfctrl1(val) csr_write64(val, LOONGARCH_CSR_PERFCTRL1)
+#define write_csr_perfcntr1(val) csr_write64(val, LOONGARCH_CSR_PERFCNTR1)
+#define write_csr_perfctrl2(val) csr_write64(val, LOONGARCH_CSR_PERFCTRL2)
+#define write_csr_perfcntr2(val) csr_write64(val, LOONGARCH_CSR_PERFCNTR2)
+#define write_csr_perfctrl3(val) csr_write64(val, LOONGARCH_CSR_PERFCTRL3)
+#define write_csr_perfcntr3(val) csr_write64(val, LOONGARCH_CSR_PERFCNTR3)
+
+/*
+ * Manipulate bits in a register.
+ */
+#define __BUILD_CSR_COMMON(name) \
+static inline unsigned long \
+set_##name(unsigned long set) \
+{ \
+ unsigned long res, new; \
+ \
+ res = read_##name(); \
+ new = res | set; \
+ write_##name(new); \
+ \
+ return res; \
+} \
+ \
+static inline unsigned long \
+clear_##name(unsigned long clear) \
+{ \
+ unsigned long res, new; \
+ \
+ res = read_##name(); \
+ new = res & ~clear; \
+ write_##name(new); \
+ \
+ return res; \
+} \
+ \
+static inline unsigned long \
+change_##name(unsigned long change, unsigned long val) \
+{ \
+ unsigned long res, new; \
+ \
+ res = read_##name(); \
+ new = res & ~change; \
+ new |= (val & change); \
+ write_##name(new); \
+ \
+ return res; \
+}
+
+#define __BUILD_CSR_OP(name) __BUILD_CSR_COMMON(csr_##name)
+
+__BUILD_CSR_OP(euen)
+__BUILD_CSR_OP(ecfg)
+__BUILD_CSR_OP(tlbidx)
+
+#define set_csr_estat(val) \
+ csr_xchg32(val, val, LOONGARCH_CSR_ESTAT)
+#define clear_csr_estat(val) \
+ csr_xchg32(~(val), val, LOONGARCH_CSR_ESTAT)
+
+#endif /* __ASSEMBLY__ */
+
+/* Generic EntryLo bit definitions */
+#define ENTRYLO_V (_ULCAST_(1) << 0)
+#define ENTRYLO_D (_ULCAST_(1) << 1)
+#define ENTRYLO_PLV_SHIFT 2
+#define ENTRYLO_PLV (_ULCAST_(3) << ENTRYLO_PLV_SHIFT)
+#define ENTRYLO_C_SHIFT 4
+#define ENTRYLO_C (_ULCAST_(3) << ENTRYLO_C_SHIFT)
+#define ENTRYLO_G (_ULCAST_(1) << 6)
+#define ENTRYLO_NR (_ULCAST_(1) << 61)
+#define ENTRYLO_NX (_ULCAST_(1) << 62)
+
+/* Values for PageSize register */
+#define PS_4K 0x0000000c
+#define PS_8K 0x0000000d
+#define PS_16K 0x0000000e
+#define PS_32K 0x0000000f
+#define PS_64K 0x00000010
+#define PS_128K 0x00000011
+#define PS_256K 0x00000012
+#define PS_512K 0x00000013
+#define PS_1M 0x00000014
+#define PS_2M 0x00000015
+#define PS_4M 0x00000016
+#define PS_8M 0x00000017
+#define PS_16M 0x00000018
+#define PS_32M 0x00000019
+#define PS_64M 0x0000001a
+#define PS_128M 0x0000001b
+#define PS_256M 0x0000001c
+#define PS_512M 0x0000001d
+#define PS_1G 0x0000001e
+
+/* ExStatus.ExcCode */
+#define EXCCODE_RSV 0 /* Reserved */
+#define EXCCODE_TLBL 1 /* TLB miss on a load */
+#define EXCCODE_TLBS 2 /* TLB miss on a store */
+#define EXCCODE_TLBI 3 /* TLB miss on a ifetch */
+#define EXCCODE_TLBM 4 /* TLB modified fault */
+#define EXCCODE_TLBNR 5 /* TLB Read-Inhibit exception */
+#define EXCCODE_TLBNX 6 /* TLB Execution-Inhibit exception */
+#define EXCCODE_TLBPE 7 /* TLB Privilege Error */
+#define EXCCODE_ADE 8 /* Address Error */
+ #define EXSUBCODE_ADEF 0 /* Fetch Instruction */
+ #define EXSUBCODE_ADEM 1 /* Access Memory*/
+#define EXCCODE_ALE 9 /* Unalign Access */
+#define EXCCODE_BCE 10 /* Bounds Check Error */
+#define EXCCODE_SYS 11 /* System call */
+#define EXCCODE_BP 12 /* Breakpoint */
+#define EXCCODE_INE 13 /* Inst. Not Exist */
+#define EXCCODE_IPE 14 /* Inst. Privileged Error */
+#define EXCCODE_FPDIS 15 /* FPU Disabled */
+#define EXCCODE_LSXDIS 16 /* LSX Disabled */
+#define EXCCODE_LASXDIS 17 /* LASX Disabled */
+#define EXCCODE_FPE 18 /* Floating Point Exception */
+ #define EXCSUBCODE_FPE 0 /* Floating Point Exception */
+ #define EXCSUBCODE_VFPE 1 /* Vector Exception */
+#define EXCCODE_WATCH 19 /* WatchPoint Exception */
+ #define EXCSUBCODE_WPEF 0 /* ... on Instruction Fetch */
+ #define EXCSUBCODE_WPEM 1 /* ... on Memory Accesses */
+#define EXCCODE_BTDIS 20 /* Binary Trans. Disabled */
+#define EXCCODE_BTE 21 /* Binary Trans. Exception */
+#define EXCCODE_GSPR 22 /* Guest Privileged Error */
+#define EXCCODE_HVC 23 /* Hypercall */
+#define EXCCODE_GCM 24 /* Guest CSR modified */
+ #define EXCSUBCODE_GCSC 0 /* Software caused */
+ #define EXCSUBCODE_GCHC 1 /* Hardware caused */
+#define EXCCODE_SE 25 /* Security */
+
+/* Interrupt numbers */
+#define INT_SWI0 0 /* Software Interrupts */
+#define INT_SWI1 1
+#define INT_HWI0 2 /* Hardware Interrupts */
+#define INT_HWI1 3
+#define INT_HWI2 4
+#define INT_HWI3 5
+#define INT_HWI4 6
+#define INT_HWI5 7
+#define INT_HWI6 8
+#define INT_HWI7 9
+#define INT_PCOV 10 /* Performance Counter Overflow */
+#define INT_TI 11 /* Timer */
+#define INT_IPI 12
+#define INT_NMI 13
+
+/* ExcCodes corresponding to interrupts */
+#define EXCCODE_INT_NUM (INT_NMI + 1)
+#define EXCCODE_INT_START 64
+#define EXCCODE_INT_END (EXCCODE_INT_START + EXCCODE_INT_NUM - 1)
+
+/* FPU Status Register Names */
+#ifndef CONFIG_AS_HAS_FCSR_CLASS
+#define LOONGARCH_FCSR0 $r0
+#define LOONGARCH_FCSR1 $r1
+#define LOONGARCH_FCSR2 $r2
+#define LOONGARCH_FCSR3 $r3
+#else
+#define LOONGARCH_FCSR0 $fcsr0
+#define LOONGARCH_FCSR1 $fcsr1
+#define LOONGARCH_FCSR2 $fcsr2
+#define LOONGARCH_FCSR3 $fcsr3
+#endif
+
+/* FPU Status Register Values */
+#define FPU_CSR_RSVD 0xe0e0fce0
+
+/*
+ * X the exception cause indicator
+ * E the exception enable
+ * S the sticky/flag bit
+ */
+#define FPU_CSR_ALL_X 0x1f000000
+#define FPU_CSR_INV_X 0x10000000
+#define FPU_CSR_DIV_X 0x08000000
+#define FPU_CSR_OVF_X 0x04000000
+#define FPU_CSR_UDF_X 0x02000000
+#define FPU_CSR_INE_X 0x01000000
+
+#define FPU_CSR_ALL_S 0x001f0000
+#define FPU_CSR_INV_S 0x00100000
+#define FPU_CSR_DIV_S 0x00080000
+#define FPU_CSR_OVF_S 0x00040000
+#define FPU_CSR_UDF_S 0x00020000
+#define FPU_CSR_INE_S 0x00010000
+
+#define FPU_CSR_ALL_E 0x0000001f
+#define FPU_CSR_INV_E 0x00000010
+#define FPU_CSR_DIV_E 0x00000008
+#define FPU_CSR_OVF_E 0x00000004
+#define FPU_CSR_UDF_E 0x00000002
+#define FPU_CSR_INE_E 0x00000001
+
+/* Bits 8 and 9 of FPU Status Register specify the rounding mode */
+#define FPU_CSR_RM 0x300
+#define FPU_CSR_RN 0x000 /* nearest */
+#define FPU_CSR_RZ 0x100 /* towards zero */
+#define FPU_CSR_RU 0x200 /* towards +Infinity */
+#define FPU_CSR_RD 0x300 /* towards -Infinity */
+
+/* Bit 6 of FPU Status Register specify the LBT TOP simulation mode */
+#define FPU_CSR_TM_SHIFT 0x6
+#define FPU_CSR_TM (_ULCAST_(1) << FPU_CSR_TM_SHIFT)
+
+#define read_fcsr(source) \
+({ \
+ unsigned int __res; \
+\
+ __asm__ __volatile__( \
+ " movfcsr2gr %0, "__stringify(source)" \n" \
+ : "=r" (__res)); \
+ __res; \
+})
+
+#define write_fcsr(dest, val) \
+do { \
+ __asm__ __volatile__( \
+ " movgr2fcsr "__stringify(dest)", %0 \n" \
+ : : "r" (val)); \
+} while (0)
+
+#endif /* _ASM_LOONGARCH_H */
diff --git a/arch/loongarch/include/asm/posix_types.h b/arch/loongarch/include/asm/posix_types.h
new file mode 100644
index 000000000000..0ed5fa4c5fae
--- /dev/null
+++ b/arch/loongarch/include/asm/posix_types.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * linux/include/asm-arm/posix_types.h
+ *
+ * Copyright (C) 1996-1998 Russell King.
+ *
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Copyright (C) 2010 Shawn Lin (nobuhiro@andestech.com)
+ * Copyright (C) 2011 Macpaul Lin (macpaul@andestech.com)
+ * Copyright (C) 2017 Rick Chen (rick@andestech.com)
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+#ifndef __ARCH_LOONGARCH_POSIX_TYPES_H
+#define __ARCH_LOONGARCH_POSIX_TYPES_H
+
+/*
+ * This file is generally used by user-level software, so you need to
+ * be a little careful about namespace pollution etc. Also, we cannot
+ * assume GCC is being used.
+ */
+
+typedef unsigned short __kernel_dev_t;
+typedef unsigned long __kernel_ino_t;
+typedef unsigned short __kernel_mode_t;
+typedef unsigned short __kernel_nlink_t;
+typedef long __kernel_off_t;
+typedef int __kernel_pid_t;
+typedef unsigned short __kernel_ipc_pid_t;
+typedef unsigned short __kernel_uid_t;
+typedef unsigned short __kernel_gid_t;
+#ifdef __GNUC__
+typedef __SIZE_TYPE__ __kernel_size_t;
+#else
+typedef unsigned long __kernel_size_t;
+#endif
+typedef long __kernel_ssize_t;
+typedef long __kernel_ptrdiff_t;
+typedef long __kernel_time_t;
+typedef long __kernel_suseconds_t;
+typedef long __kernel_clock_t;
+typedef int __kernel_daddr_t;
+typedef char *__kernel_caddr_t;
+typedef unsigned short __kernel_uid16_t;
+typedef unsigned short __kernel_gid16_t;
+typedef unsigned int __kernel_uid32_t;
+typedef unsigned int __kernel_gid32_t;
+
+typedef unsigned short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+
+#ifdef __GNUC__
+typedef long long __kernel_loff_t;
+#endif
+
+typedef struct {
+#if defined(__KERNEL__) || defined(__USE_ALL)
+ int val[2];
+#else /* !defined(__KERNEL__) && !defined(__USE_ALL) */
+ int __val[2];
+#endif /* !defined(__KERNEL__) && !defined(__USE_ALL) */
+} __kernel_fsid_t;
+
+#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
+
+#undef __FD_SET
+#define __FD_SET(_fd, fdsetp) \
+ typeof(_fd) (fd) = (_fd); \
+ (((fd_set *)fdsetp)->fds_bits[fd >> 5] |= (1 << (fd & 31)))
+
+#undef __FD_CLR
+#define __FD_CLR(_fd, fdsetp) \
+ typeof(_fd) (fd) = (_fd); \
+ (((fd_set *)fdsetp)->fds_bits[fd >> 5] &= ~(1 << (fd & 31)))
+
+#undef __FD_ISSET
+#define __FD_ISSET(_fd, fdsetp) \
+ typeof(_fd) (fd) = (_fd); \
+ ((((fd_set *)fdsetp)->fds_bits[fd >> 5] & (1 << (fd & 31))) != 0)
+
+#undef __FD_ZERO
+#define __FD_ZERO(_fdsetp) \
+ typeof(_fdsetp) (fd) = (_fdsetp); \
+ (memset(fdsetp, 0, sizeof(*(fd_set *)fdsetp)))
+
+#endif
+
+#endif /* __ARCH_LOONGARCH_POSIX_TYPES_H */
diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h
new file mode 100644
index 000000000000..7242a3e6ca7e
--- /dev/null
+++ b/arch/loongarch/include/asm/processor.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_PROCESSOR_H
+#define __ASM_LOONGARCH_PROCESSOR_H
+
+/* Dummy header */
+
+#endif /* __ASM_LOONGARCH_PROCESSOR_H */
diff --git a/arch/loongarch/include/asm/ptrace.h b/arch/loongarch/include/asm/ptrace.h
new file mode 100644
index 000000000000..1b3c2b5b8f16
--- /dev/null
+++ b/arch/loongarch/include/asm/ptrace.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_PTRACE_H
+#define __ASM_LOONGARCH_PTRACE_H
+
+struct pt_regs {
+ /* Main processor registers. */
+ unsigned long regs[32];
+
+ /* Original syscall arg0. */
+ unsigned long orig_a0;
+
+ /* Special CSR registers. */
+ unsigned long csr_era;
+ unsigned long csr_badvaddr;
+ unsigned long csr_crmd;
+ unsigned long csr_prmd;
+ unsigned long csr_euen;
+ unsigned long csr_ecfg;
+ unsigned long csr_estat;
+ unsigned long __last[];
+} __aligned(8);
+
+#ifdef CONFIG_64BIT
+#define REG_FMT "%016lx"
+#else
+#define REG_FMT "%08lx"
+#endif
+
+#endif /* __ASM_LOONGARCH_PTRACE_H */
diff --git a/arch/loongarch/include/asm/regdef.h b/arch/loongarch/include/asm/regdef.h
new file mode 100644
index 000000000000..5fbc0d4757e3
--- /dev/null
+++ b/arch/loongarch/include/asm/regdef.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+#ifndef _ASM_REGDEF_H
+#define _ASM_REGDEF_H
+
+#define zero $r0 /* wired zero */
+#define ra $r1 /* return address */
+#define tp $r2
+#define sp $r3 /* stack pointer */
+#define a0 $r4 /* argument registers, a0/a1 reused as v0/v1 for return value */
+#define a1 $r5
+#define a2 $r6
+#define a3 $r7
+#define a4 $r8
+#define a5 $r9
+#define a6 $r10
+#define a7 $r11
+#define t0 $r12 /* caller saved */
+#define t1 $r13
+#define t2 $r14
+#define t3 $r15
+#define t4 $r16
+#define t5 $r17
+#define t6 $r18
+#define t7 $r19
+#define t8 $r20
+#define u0 $r21
+#define fp $r22 /* frame pointer */
+#define s0 $r23 /* callee saved */
+#define s1 $r24
+#define s2 $r25
+#define s3 $r26
+#define s4 $r27
+#define s5 $r28
+#define s6 $r29
+#define s7 $r30
+#define s8 $r31
+
+#endif /* _ASM_REGDEF_H */
diff --git a/arch/loongarch/include/asm/sections.h b/arch/loongarch/include/asm/sections.h
new file mode 100644
index 000000000000..9f5009a1f235
--- /dev/null
+++ b/arch/loongarch/include/asm/sections.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __ASM_LOONGARCH_SECTIONS_H
+#define __ASM_LOONGARCH_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+#endif
diff --git a/arch/loongarch/include/asm/setjmp.h b/arch/loongarch/include/asm/setjmp.h
new file mode 100644
index 000000000000..4fec81fdc41d
--- /dev/null
+++ b/arch/loongarch/include/asm/setjmp.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef _ASM_SETJMP_H_
+#define _ASM_SETJMP_H_
+
+/*
+ * This really should be opaque, but the EFI implementation wrongly
+ * assumes that a 'struct jmp_buf_data' is defined.
+ */
+struct jmp_buf_data {
+ unsigned long s_regs[9]; /* s0 - 8 */
+ unsigned long fp;
+ unsigned long sp;
+ unsigned long ra;
+};
+
+#endif /* _SETJMP_H_ */
diff --git a/arch/loongarch/include/asm/spl.h b/arch/loongarch/include/asm/spl.h
new file mode 100644
index 000000000000..b8b19f65cb36
--- /dev/null
+++ b/arch/loongarch/include/asm/spl.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_SPL_H
+#define __ASM_SPL_H
+
+/* Dummy header */
+
+#endif
diff --git a/arch/loongarch/include/asm/string.h b/arch/loongarch/include/asm/string.h
new file mode 100644
index 000000000000..09877956de9a
--- /dev/null
+++ b/arch/loongarch/include/asm/string.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_STRING_H
+#define __ASM_STRING_H
+
+/* Dummy header */
+
+#endif
diff --git a/arch/loongarch/include/asm/system.h b/arch/loongarch/include/asm/system.h
new file mode 100644
index 000000000000..4fbddb4fe7bc
--- /dev/null
+++ b/arch/loongarch/include/asm/system.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_SYSTEM_H
+#define __ASM_LOONGARCH_SYSTEM_H
+
+#include <asm/loongarch.h>
+
+/*
+ * Interrupt configuration macros
+ */
+
+static inline void arch_local_irq_enable(void)
+{
+ u32 flags = CSR_CRMD_IE;
+
+ __asm__ __volatile__(
+ "csrxchg %[val], %[mask], %[reg]\n\t"
+ : [val] "+r" (flags)
+ : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
+ : "memory");
+}
+
+#define local_irq_enable arch_local_irq_enable
+
+static inline void arch_local_irq_disable(void)
+{
+ u32 flags = 0;
+
+ __asm__ __volatile__(
+ "csrxchg %[val], %[mask], %[reg]\n\t"
+ : [val] "+r" (flags)
+ : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
+ : "memory");
+}
+
+#define local_irq_disable arch_local_irq_disable
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags = 0;
+
+ __asm__ __volatile__(
+ "csrxchg %[val], %[mask], %[reg]\n\t"
+ : [val] "+r" (flags)
+ : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
+ : "memory");
+ return flags;
+}
+
+#define local_irq_save(__flags) \
+ do { \
+ __flags = arch_local_irq_save(); \
+ } while (0)
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ __asm__ __volatile__(
+ "csrxchg %[val], %[mask], %[reg]\n\t"
+ : [val] "+r" (flags)
+ : [mask] "r" (CSR_CRMD_IE), [reg] "i" (LOONGARCH_CSR_CRMD)
+ : "memory");
+}
+
+#define local_irq_restore(__flags) \
+ do { \
+ arch_local_irq_restore(__flags); \
+ } while (0)
+
+#endif
diff --git a/arch/loongarch/include/asm/types.h b/arch/loongarch/include/asm/types.h
new file mode 100644
index 000000000000..eb5749457922
--- /dev/null
+++ b/arch/loongarch/include/asm/types.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Copyright (C) 2010 Shawn Lin (nobuhiro@andestech.com)
+ * Copyright (C) 2011 Macpaul Lin (macpaul@andestech.com)
+ * Copyright (C) 2017 Rick Chen (rick@andestech.com)
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_TYPES_H
+#define __ASM_LOONGARCH_TYPES_H
+
+#include <asm-generic/int-ll64.h>
+
+typedef unsigned short umode_t;
+
+/*
+ * These aren't exported outside the kernel to avoid name space clashes
+ */
+#ifdef __KERNEL__
+
+#define BITS_PER_LONG 64
+
+#include <stddef.h>
+
+#ifdef CONFIG_DMA_ADDR_T_64BIT
+typedef u64 dma_addr_t;
+#else
+typedef u32 dma_addr_t;
+#endif
+
+typedef unsigned long long phys_addr_t;
+typedef unsigned long long phys_size_t;
+
+#endif /* __KERNEL__ */
+
+#endif
diff --git a/arch/loongarch/include/asm/u-boot-loongarch.h b/arch/loongarch/include/asm/u-boot-loongarch.h
new file mode 100644
index 000000000000..7f21d2a3e963
--- /dev/null
+++ b/arch/loongarch/include/asm/u-boot-loongarch.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef _U_BOOT_LOONGARCH_H_
+#define _U_BOOT_LOONGARCH_H_
+
+/* cpu/.../cpu.c */
+int cleanup_before_linux(void);
+
+/* board/.../... */
+int board_init(void);
+void board_quiesce_devices(void);
+
+#endif
diff --git a/arch/loongarch/include/asm/u-boot.h b/arch/loongarch/include/asm/u-boot.h
new file mode 100644
index 000000000000..123a7f09a01c
--- /dev/null
+++ b/arch/loongarch/include/asm/u-boot.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * Copyright (C) 2017 Andes Technology Corporation
+ * Rick Chen, Andes Technology Corporation <rick@andestech.com>
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ *
+ ********************************************************************
+ * NOTE: This header file defines an interface to U-Boot. Including
+ * this (unmodified) header file in another file is considered normal
+ * use of U-Boot, and does *not* fall under the heading of "derived
+ * work".
+ ********************************************************************
+ */
+
+#ifndef _U_BOOT_H_
+#define _U_BOOT_H_ 1
+
+/* Use the generic board which requires a unified bd_info */
+#include <asm-generic/u-boot.h>
+#include <asm/u-boot-loongarch.h>
+
+/* For image.h:image_check_target_arch() */
+#define IH_ARCH_DEFAULT IH_ARCH_LOONGARCH
+
+#endif /* _U_BOOT_H_ */
diff --git a/arch/loongarch/include/asm/unaligned.h b/arch/loongarch/include/asm/unaligned.h
new file mode 100644
index 000000000000..65cd4340ce93
--- /dev/null
+++ b/arch/loongarch/include/asm/unaligned.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __ASM_LOONGARCH_UNALIGNED_H
+#define __ASM_LOONGARCH_UNALIGNED_H
+
+#include <asm-generic/unaligned.h>
+
+#endif
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
new file mode 100644
index 000000000000..3dbed94cc624
--- /dev/null
+++ b/arch/loongarch/lib/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
diff --git a/include/host_arch.h b/include/host_arch.h
index 261194bd7c6e..ceeb61d6ad88 100644
--- a/include/host_arch.h
+++ b/include/host_arch.h
@@ -10,6 +10,7 @@
#if 0
export HOST_ARCH_AARCH64=0xaa64
export HOST_ARCH_ARM=0x00a7
+export HOST_ARCH_LOONGARCH64=0x6264
export HOST_ARCH_RISCV32=0x5032
export HOST_ARCH_RISCV64=0x5064
export HOST_ARCH_X86=0x0386
@@ -20,6 +21,7 @@ export HOST_ARCH_X86_64=0x8664
#define HOST_ARCH_AARCH64 0xaa64
#define HOST_ARCH_ARM 0x00a7
+#define HOST_ARCH_LOONGARCH64 0x6264
#define HOST_ARCH_RISCV32 0x5032
#define HOST_ARCH_RISCV64 0x5064
#define HOST_ARCH_X86 0x0386
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 07/19] LoongArch: lib: General routines
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (5 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 06/19] LoongArch: skeleton and headers Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 08/19] LoongArch: CPU assembly routines Yao Zi
` (11 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Add cache probing through CPUCFG, cache operations, setjmp()/longjump(),
and etc. for the architecture.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Improve commit message to list introduced routines, and how
cache-probing is implemented
- Pass through addr in do_flush() macros
- Use CACHE_MAX_LEVEL instead of hard-coded 3 in probe_caches()
- Comment on cache behavior and cache probing logic in cache.c
Changed from v1
- Correctly implement dcache operations
arch/loongarch/include/asm/cache.h | 10 +
arch/loongarch/include/asm/global_data.h | 7 +
arch/loongarch/lib/Makefile | 7 +
arch/loongarch/lib/asm-offsets.c | 66 ++++++
arch/loongarch/lib/boot.c | 14 ++
arch/loongarch/lib/cache.c | 243 +++++++++++++++++++++++
arch/loongarch/lib/reset.c | 14 ++
arch/loongarch/lib/setjmp.S | 52 +++++
8 files changed, 413 insertions(+)
create mode 100644 arch/loongarch/lib/asm-offsets.c
create mode 100644 arch/loongarch/lib/boot.c
create mode 100644 arch/loongarch/lib/cache.c
create mode 100644 arch/loongarch/lib/reset.c
create mode 100644 arch/loongarch/lib/setjmp.S
diff --git a/arch/loongarch/include/asm/cache.h b/arch/loongarch/include/asm/cache.h
index 854dd0c0a02e..2dd4e82340bb 100644
--- a/arch/loongarch/include/asm/cache.h
+++ b/arch/loongarch/include/asm/cache.h
@@ -6,8 +6,11 @@
#ifndef _ASM_LOONGARCH_CACHE_H
#define _ASM_LOONGARCH_CACHE_H
+#include <linux/bitops.h>
+
/* cache */
void cache_flush(void);
+void probe_caches(void);
#define cache_op(op, addr) \
__asm__ __volatile__( \
@@ -15,6 +18,13 @@ void cache_flush(void);
: \
: "i" (op), "ZC" (*(unsigned char *)(addr)))
+#define CACHE_MAX_LEVEL 3
+#define CACHE_MAX_INDEX 6
+#define CACHE_OP GENMASK(4, 3)
+#define CACHE_INDEX_INVWB 0x1
+#define CACHE_HIT_INVWB 0x2
+#define CACHE_INDEX GENMASK(2, 0)
+
#ifdef CONFIG_SYS_CACHELINE_SIZE
#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE
#else
diff --git a/arch/loongarch/include/asm/global_data.h b/arch/loongarch/include/asm/global_data.h
index 2a9a525e2f37..7aab802ca04d 100644
--- a/arch/loongarch/include/asm/global_data.h
+++ b/arch/loongarch/include/asm/global_data.h
@@ -10,6 +10,7 @@
#define __ASM_GBL_DATA_H
#include <linux/types.h>
+#include <asm/cache.h>
#include <asm/u-boot.h>
#include <compiler.h>
@@ -24,6 +25,12 @@ struct arch_global_data {
#ifdef CONFIG_SMBIOS
ulong smbios_start; /* Start address of SMBIOS table */
#endif
+ ushort dcache_ways[CACHE_MAX_INDEX];
+ ushort dcache_sets[CACHE_MAX_INDEX];
+ ushort dcache_linesizes[CACHE_MAX_INDEX];
+ ushort dcache_index[CACHE_MAX_INDEX];
+ ushort dcache_levels;
+ bool dcache_inclusive;
};
#include <asm-generic/global_data.h>
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
index 3dbed94cc624..3c17b9cd85af 100644
--- a/arch/loongarch/lib/Makefile
+++ b/arch/loongarch/lib/Makefile
@@ -3,3 +3,10 @@
# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
#
+obj-$(CONFIG_CMD_GO) += boot.o
+obj-y += cache.o
+obj-y += interrupts.o
+ifeq ($(CONFIG_$(SPL_)SYSRESET),)
+obj-y += reset.o
+endif
+obj-y += setjmp.o
diff --git a/arch/loongarch/lib/asm-offsets.c b/arch/loongarch/lib/asm-offsets.c
new file mode 100644
index 000000000000..e3f4c629b63d
--- /dev/null
+++ b/arch/loongarch/lib/asm-offsets.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ *
+ * From arch/x86/lib/asm-offsets.c
+ *
+ * This program is used to generate definitions needed by
+ * assembly language modules.
+ */
+
+#include <asm/global_data.h>
+#include <asm/ptrace.h>
+#include <linux/kbuild.h>
+
+static void __used output_ptreg_defines(void)
+{
+ COMMENT("LoongArch pt_regs offsets.");
+ OFFSET(PT_R0, pt_regs, regs[0]);
+ OFFSET(PT_R1, pt_regs, regs[1]);
+ OFFSET(PT_R2, pt_regs, regs[2]);
+ OFFSET(PT_R3, pt_regs, regs[3]);
+ OFFSET(PT_R4, pt_regs, regs[4]);
+ OFFSET(PT_R5, pt_regs, regs[5]);
+ OFFSET(PT_R6, pt_regs, regs[6]);
+ OFFSET(PT_R7, pt_regs, regs[7]);
+ OFFSET(PT_R8, pt_regs, regs[8]);
+ OFFSET(PT_R9, pt_regs, regs[9]);
+ OFFSET(PT_R10, pt_regs, regs[10]);
+ OFFSET(PT_R11, pt_regs, regs[11]);
+ OFFSET(PT_R12, pt_regs, regs[12]);
+ OFFSET(PT_R13, pt_regs, regs[13]);
+ OFFSET(PT_R14, pt_regs, regs[14]);
+ OFFSET(PT_R15, pt_regs, regs[15]);
+ OFFSET(PT_R16, pt_regs, regs[16]);
+ OFFSET(PT_R17, pt_regs, regs[17]);
+ OFFSET(PT_R18, pt_regs, regs[18]);
+ OFFSET(PT_R19, pt_regs, regs[19]);
+ OFFSET(PT_R20, pt_regs, regs[20]);
+ OFFSET(PT_R21, pt_regs, regs[21]);
+ OFFSET(PT_R22, pt_regs, regs[22]);
+ OFFSET(PT_R23, pt_regs, regs[23]);
+ OFFSET(PT_R24, pt_regs, regs[24]);
+ OFFSET(PT_R25, pt_regs, regs[25]);
+ OFFSET(PT_R26, pt_regs, regs[26]);
+ OFFSET(PT_R27, pt_regs, regs[27]);
+ OFFSET(PT_R28, pt_regs, regs[28]);
+ OFFSET(PT_R29, pt_regs, regs[29]);
+ OFFSET(PT_R30, pt_regs, regs[30]);
+ OFFSET(PT_R31, pt_regs, regs[31]);
+ OFFSET(PT_CRMD, pt_regs, csr_crmd);
+ OFFSET(PT_PRMD, pt_regs, csr_prmd);
+ OFFSET(PT_EUEN, pt_regs, csr_euen);
+ OFFSET(PT_ECFG, pt_regs, csr_ecfg);
+ OFFSET(PT_ESTAT, pt_regs, csr_estat);
+ OFFSET(PT_ERA, pt_regs, csr_era);
+ OFFSET(PT_BVADDR, pt_regs, csr_badvaddr);
+ OFFSET(PT_ORIG_A0, pt_regs, orig_a0);
+ DEFINE(PT_SIZE, sizeof(struct pt_regs));
+ BLANK();
+}
+
+int main(void)
+{
+ output_ptreg_defines();
+ return 0;
+}
diff --git a/arch/loongarch/lib/boot.c b/arch/loongarch/lib/boot.c
new file mode 100644
index 000000000000..327be16bb59f
--- /dev/null
+++ b/arch/loongarch/lib/boot.c
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <asm/u-boot.h>
+
+unsigned long do_go_exec(ulong (*entry)(int, char * const []),
+ int argc, char *const argv[])
+{
+ cleanup_before_linux();
+
+ return entry(argc, argv);
+}
diff --git a/arch/loongarch/lib/cache.c b/arch/loongarch/lib/cache.c
new file mode 100644
index 000000000000..3d4551527483
--- /dev/null
+++ b/arch/loongarch/lib/cache.c
@@ -0,0 +1,243 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ * Copyright (C) 2026 Yao Zi <me@ziyao.cc>
+ */
+
+#include <asm/cache.h>
+#include <asm/global_data.h>
+#include <asm/loongarch.h>
+#include <cpu_func.h>
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+
+#define CPUCFG_LX_IUPRE BIT(0)
+#define CPUCFG_LX_IUUNIFY BIT(1)
+#define CPUCFG_LX_IUINCL BIT(3)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Existing LoongArch hardware maintains I-D cache consistency in hardware,
+ * thus only an ibar instruction is used in operations related to I-cache, in
+ * order to prevent pipeline hazard.
+ *
+ * Cache operations is implemented through CACOP instruction, which has three
+ * arguments: index of the cache, the operation, and either the cache line
+ * index, or a virtual address. The first two arguments are combined into an
+ * immediate operand.
+ *
+ * Caches are indexed from L1 to L3. For a level with separate I/D caches, the
+ * I-cache is ordered before the D-cache.
+ *
+ * Currently three cache operations are defined,
+ * - initialize a cache line
+ * - invalidate (and possibly writeback if it's a D-cache) a cache line, where
+ * the cache line is indexed by
+ * - cache line index (CACHE_INDEX_INVWB), or
+ * - virtual address (CACHE_HIT_INVWB)
+ *
+ * Invalidating the leaf cache automatically invalidates other caches if it's
+ * inclusive.
+ */
+
+static inline void flush_cache_line_index(unsigned int cache_id,
+ unsigned long index)
+{
+#define do_flush(_cache_id, _index) \
+ case _cache_id: \
+ cache_op(FIELD_PREP(CACHE_OP, CACHE_INDEX_INVWB) | \
+ FIELD_PREP(CACHE_INDEX, _cache_id), \
+ _index); \
+ break;
+
+ switch (cache_id) {
+ do_flush(0, index);
+ do_flush(1, index);
+ do_flush(2, index);
+ do_flush(3, index);
+ do_flush(4, index);
+ do_flush(5, index);
+ }
+
+#undef do_flush
+}
+
+static inline void flush_cache_line_hit(unsigned int cache_id,
+ unsigned long addr)
+{
+#define do_flush(_cache_id, _addr) \
+ case _cache_id: \
+ cache_op(FIELD_PREP(CACHE_OP, CACHE_HIT_INVWB) | \
+ FIELD_PREP(CACHE_INDEX, _cache_id), \
+ _addr); \
+ break;
+
+ switch (cache_id) {
+ do_flush(0, addr);
+ do_flush(1, addr);
+ do_flush(2, addr);
+ do_flush(3, addr);
+ do_flush(4, addr);
+ do_flush(5, addr);
+ }
+
+#undef do_flush
+}
+
+void invalidate_icache_all(void)
+{
+ asm volatile ("\tibar 0\n"::);
+}
+
+static void flush_dcache_level_all(unsigned int level)
+{
+ unsigned int way, set;
+ unsigned long index = 0;
+
+ for (set = 0; set < gd->arch.dcache_sets[level]; set++) {
+ for (way = 0; way < gd->arch.dcache_ways[level]; way++) {
+ flush_cache_line_index(gd->arch.dcache_index[level],
+ index);
+ index++;
+ }
+
+ index -= gd->arch.dcache_ways[level];
+ index += gd->arch.dcache_linesizes[level];
+ }
+}
+
+__weak void flush_dcache_all(void)
+{
+ unsigned int level;
+
+ if (gd->arch.dcache_inclusive) {
+ flush_dcache_level_all(gd->arch.dcache_levels - 1);
+ return;
+ }
+
+ for (level = 0; level < gd->arch.dcache_levels; level++)
+ flush_dcache_level_all(level);
+}
+
+static void flush_dcache_level(unsigned int level, unsigned long addr,
+ unsigned long end)
+{
+ for (; addr < end; addr += gd->arch.dcache_linesizes[level])
+ flush_cache_line_hit(gd->arch.dcache_index[level], addr);
+}
+
+__weak void flush_dcache_range(unsigned long start, unsigned long end)
+{
+ unsigned int level;
+
+ if (gd->arch.dcache_inclusive) {
+ flush_dcache_level(gd->arch.dcache_levels - 1, start, end);
+ return;
+ }
+
+ for (level = 0; level < gd->arch.dcache_levels; level++)
+ flush_dcache_level(level, start, end);
+}
+
+__weak void invalidate_icache_range(unsigned long start, unsigned long end)
+{
+ /* LoongArch mandatory hardware I-Cache coherence */
+ invalidate_icache_all();
+}
+
+__weak void invalidate_dcache_range(unsigned long start, unsigned long end)
+{
+ flush_dcache_range(start, end);
+}
+
+__weak void cache_flush(void)
+{
+ flush_dcache_all();
+}
+
+__weak void cache_invalidate(void)
+{
+ flush_dcache_all();
+}
+
+__weak void flush_cache(unsigned long addr, unsigned long size)
+{
+ invalidate_icache_range(addr, addr + size);
+ flush_dcache_range(addr, addr + size);
+}
+
+__weak void dcache_enable(void)
+{
+}
+
+__weak void dcache_disable(void)
+{
+}
+
+__weak int dcache_status(void)
+{
+ return 0;
+}
+
+static void populate_dcache_properties(u32 cfg0, unsigned int level,
+ unsigned int cfgoff)
+{
+ u32 cfg1 = read_cpucfg(cfgoff);
+
+ if (level != 0)
+ gd->arch.dcache_inclusive = cfg0 & CPUCFG_LX_IUINCL;
+
+ gd->arch.dcache_ways[level] = FIELD_GET(CPUCFG_CACHE_WAYS_M, cfg1) + 1;
+ gd->arch.dcache_sets[level] = 1 << FIELD_GET(CPUCFG_CACHE_SETS_M, cfg1);
+ gd->arch.dcache_linesizes[level] = 1 << FIELD_GET(CPUCFG_CACHE_LSIZE_M, cfg1);
+}
+
+void probe_caches(void)
+{
+ unsigned int level = 0, index = 0;
+ u32 cfg = read_cpucfg(LOONGARCH_CPUCFG16);
+
+ if (cfg & CPUCFG16_L1_IUPRE) {
+ if (cfg & CPUCFG16_L1_IUUNIFY) {
+ gd->arch.dcache_index[level] = index;
+ populate_dcache_properties(cfg, level++,
+ LOONGARCH_CPUCFG17);
+ }
+
+ index++;
+ }
+
+ if (cfg & CPUCFG16_L1_DPRE) {
+ gd->arch.dcache_index[level] = index++;
+ populate_dcache_properties(cfg, level++, LOONGARCH_CPUCFG18);
+ }
+
+ cfg >>= 3;
+
+ /*
+ * Currently no CPUCFG register is defined to hold information for
+ * separate L2D and L3D. Assume that L2 and L3, if present, must be
+ * unified or instruction-only.
+ */
+ for (; level < CACHE_MAX_LEVEL; level++) {
+ if (cfg & CPUCFG_LX_IUPRE && cfg & CPUCFG_LX_IUUNIFY) {
+ gd->arch.dcache_index[level] = index++;
+ populate_dcache_properties(cfg, level,
+ LOONGARCH_CPUCFG17 + level);
+ } else {
+ break;
+ }
+
+ cfg >>= 7;
+ }
+
+ gd->arch.dcache_levels = level;
+}
+
+__weak void enable_caches(void)
+{
+ cache_invalidate();
+ /* Enable cache for direct address translation mode */
+ csr_xchg64(1 << CSR_CRMD_DACM_SHIFT, CSR_CRMD_DACM, LOONGARCH_CSR_CRMD);
+}
diff --git a/arch/loongarch/lib/reset.c b/arch/loongarch/lib/reset.c
new file mode 100644
index 000000000000..ddf29ee41d95
--- /dev/null
+++ b/arch/loongarch/lib/reset.c
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <command.h>
+#include <cpu_func.h>
+
+int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+ reset_cpu();
+
+ return 0;
+}
diff --git a/arch/loongarch/lib/setjmp.S b/arch/loongarch/lib/setjmp.S
new file mode 100644
index 000000000000..12981d0013fa
--- /dev/null
+++ b/arch/loongarch/lib/setjmp.S
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <config.h>
+#include <asm/asm.h>
+#include <linux/linkage.h>
+
+.pushsection .text.setjmp, "ax"
+ENTRY(setjmp)
+ LONG_S s0, a0, 0
+ LONG_S s1, a0, (1 * LONGSIZE)
+ LONG_S s2, a0, (2 * LONGSIZE)
+ LONG_S s3, a0, (3 * LONGSIZE)
+ LONG_S s4, a0, (4 * LONGSIZE)
+ LONG_S s5, a0, (5 * LONGSIZE)
+ LONG_S s6, a0, (6 * LONGSIZE)
+ LONG_S s7, a0, (7 * LONGSIZE)
+ LONG_S s8, a0, (8 * LONGSIZE)
+ LONG_S fp, a0, (9 * LONGSIZE)
+ LONG_S sp, a0, (10 * LONGSIZE)
+ LONG_S ra, a0, (11 * LONGSIZE)
+
+ move a0, zero
+ ret
+ENDPROC(setjmp)
+.popsection
+
+.pushsection .text.longjmp, "ax"
+ENTRY(longjmp)
+ LONG_L s0, a0, 0
+ LONG_L s1, a0, (1 * LONGSIZE)
+ LONG_L s2, a0, (2 * LONGSIZE)
+ LONG_L s3, a0, (3 * LONGSIZE)
+ LONG_L s4, a0, (4 * LONGSIZE)
+ LONG_L s5, a0, (5 * LONGSIZE)
+ LONG_L s6, a0, (6 * LONGSIZE)
+ LONG_L s7, a0, (7 * LONGSIZE)
+ LONG_L s8, a0, (8 * LONGSIZE)
+ LONG_L fp, a0, (9 * LONGSIZE)
+ LONG_L sp, a0, (10 * LONGSIZE)
+ LONG_L ra, a0, (11 * LONGSIZE)
+
+ /* Move the return value in place, but return 1 if passed 0. */
+ li.w a0, 1
+ beqz a1, 1f
+ move a0, a1
+1:
+ jr ra
+ENDPROC(longjmp)
+.popsection
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 08/19] LoongArch: CPU assembly routines
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (6 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 07/19] LoongArch: lib: General routines Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 09/19] LoongArch: Exception handling Yao Zi
` (10 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
start.S for initialisation, smp_secondary routine for
a spin-table like interface for secondary cpus.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Add copyright to cpu/cpu.c
- Drop unnecessary includes from cpu/cpu.c
- Drop "resetting..." message from reset_cpu()
- Fix misleading comment about t1 in start.S
- Remove "move sp, s0" after board_init_f_alloc_reserve from start.S
- Clean up whitespaces in start.S
Changed from v1
- Replace t6, which is volatile across C function boundaries, with s5
to hold relocation offset in start.S
- Fix typo "CLear" in smp_secondary.S
arch/loongarch/cpu/Makefile | 4 +
arch/loongarch/cpu/cpu.c | 17 +++
arch/loongarch/cpu/smp_secondary.S | 55 ++++++++++
arch/loongarch/cpu/start.S | 168 +++++++++++++++++++++++++++++
4 files changed, 244 insertions(+)
create mode 100644 arch/loongarch/cpu/cpu.c
create mode 100644 arch/loongarch/cpu/smp_secondary.S
create mode 100644 arch/loongarch/cpu/start.S
diff --git a/arch/loongarch/cpu/Makefile b/arch/loongarch/cpu/Makefile
index 3dbed94cc624..d3c38a16d057 100644
--- a/arch/loongarch/cpu/Makefile
+++ b/arch/loongarch/cpu/Makefile
@@ -3,3 +3,7 @@
# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
#
+extra-y = start.o
+
+obj-y += cpu.o
+obj-y += smp_secondary.o
diff --git a/arch/loongarch/cpu/cpu.c b/arch/loongarch/cpu/cpu.c
new file mode 100644
index 000000000000..38005d576458
--- /dev/null
+++ b/arch/loongarch/cpu/cpu.c
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ * Copyright (C) 2026 Yao Zi <me@ziyao.cc>
+ */
+
+#include <hang.h>
+#include <stdio.h>
+
+#if !CONFIG_IS_ENABLED(SYSRESET)
+void reset_cpu(void)
+{
+ printf("reset not supported yet\n");
+ hang();
+}
+#endif
diff --git a/arch/loongarch/cpu/smp_secondary.S b/arch/loongarch/cpu/smp_secondary.S
new file mode 100644
index 000000000000..4ef4b16a3fb6
--- /dev/null
+++ b/arch/loongarch/cpu/smp_secondary.S
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Loop to run on secondary cores for LoongArch CPU
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm.h>
+#include <asm/loongarch.h>
+#include <asm/arch/entry-init.h>
+
+ENTRY(secondary_core_loop)
+ smp_secondary_setup
+
+ PTR_LI t0, LOONGARCH_IOCSR_MBUF0
+ LONG_IOCSRWR zero, t0
+
+ /* Enable IPI interrupt for wakeup */
+ LONG_LI t0, ECFGF_IPI
+ csrxchg t0, t0, LOONGARCH_CSR_ECFG
+
+ LONG_LI t0, 0xffffffff
+ li.w t1, LOONGARCH_IOCSR_IPI_CLEAR
+ iocsrwr.w t0, t1
+ li.w t1, LOONGARCH_IOCSR_IPI_EN
+ iocsrwr.w t0, t1
+
+ /* t1 for spin table */
+ PTR_LI t1, LOONGARCH_IOCSR_MBUF0
+
+1:
+ /* Query spin table */
+ idle 0
+ nop
+ iocsrrd.w t0, t1
+ beqz t0, 1b
+
+ /* Clear IPI interrupt */
+ PTR_LI t1, LOONGARCH_IOCSR_IPI_STATUS
+ iocsrrd.w t0, t1
+ PTR_LI t1, LOONGARCH_IOCSR_IPI_CLEAR
+ iocsrwr.w t0, t1
+
+ /* Mask all interrupts */
+ LONG_LI t0, ECFG0_IM
+ csrxchg zero, t0, LOONGARCH_CSR_ECFG
+
+ /* Jump to secondary core */
+ PTR_LI t1, LOONGARCH_IOCSR_MBUF0
+ LONG_IOCSRRD t0, t1
+ /* If we ever return, put us back to the loop */
+ la.pcrel ra, secondary_core_loop
+ jirl zero, t0, 0
+END(secondary_core_loop)
diff --git a/arch/loongarch/cpu/start.S b/arch/loongarch/cpu/start.S
new file mode 100644
index 000000000000..fdf3697834f7
--- /dev/null
+++ b/arch/loongarch/cpu/start.S
@@ -0,0 +1,168 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Startup Code for LoongArch CPU
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <asm-offsets.h>
+#include <config.h>
+#include <elf.h>
+#include <system-constants.h>
+#include <asm/addrspace.h>
+#include <asm/asm.h>
+#include <asm/loongarch.h>
+#include <asm/arch/entry-init.h>
+
+#define BOOTCORE_ID 0
+
+.section .text
+.globl _start
+_start:
+ /* Allow arch specific setup code for MCSR stuff */
+ entry_setup
+
+ /* Disable interrupt */
+ LONG_LI t0, CSR_CRMD_IE
+ csrxchg zero, t0, LOONGARCH_CSR_CRMD
+
+ /* Configure reset ebase */
+ la.pcrel t0, exception_entry
+ csrwr t0, LOONGARCH_CSR_EENTRY
+
+ /* Setup direct map window for later use */
+ PTR_LI t0, CSR_DMW0_INIT
+ csrwr t0, LOONGARCH_CSR_DMWIN0
+ PTR_LI t0, CSR_DMW1_INIT
+ csrwr t0, LOONGARCH_CSR_DMWIN1
+
+ /* Branch out for nonboot core */
+ csrrd t0, LOONGARCH_CSR_CPUID
+ andi t0, t0, CSR_CPUID_COREID
+ LONG_LI t1, BOOTCORE_ID
+ bne t1, t0, secondary_core_loop
+
+/*
+ * Set stackpointer in internal/ex RAM to call board_init_f
+ */
+call_board_init_f:
+ PTR_LI t0, (SYS_INIT_SP_ADDR & STACK_ALIGN)
+ move sp, t0 /* save stack pointer */
+/*
+ * Now sp points to the right stack belonging to current CPU.
+ * It's essential before any function call, otherwise, we get data-race.
+ */
+
+call_board_init_f_0:
+ /* find top of reserve space */
+ PTR_LI t1, 1
+ PTR_SLL t1, t1, CONFIG_STACK_SIZE_SHIFT
+ PTR_SUB a0, t0, t1 /* t1 -> size of one CPU stack */
+ bl board_init_f_alloc_reserve
+
+ /* Set global pointer to u0 ($r21) */
+ move u0, a0
+ bl board_init_f_init_reserve
+
+ /* Probe and enable cache */
+ bl probe_caches
+ bl enable_caches
+
+#ifdef CONFIG_DEBUG_UART
+ bl debug_uart_init
+#endif
+
+ move a0, zero /* a0 <-- boot_flags = 0 */
+ la.pcrel t5, board_init_f
+ jirl ra, t5, 0 /* jump to board_init_f() */
+
+/*
+ * void relocate_code(addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ */
+.globl relocate_code
+relocate_code:
+ move s2, a0 /* save addr_sp */
+ move s3, a1 /* save addr of gd */
+ move s4, a2 /* save addr of destination */
+
+/*
+ *Set up the stack
+ */
+stack_setup:
+ move sp, s2
+ la.pcrel t0, _start
+ PTR_SUB s5, s4, t0 /* s5 <- relocation offset */
+ beq t0, s4, clear_bss /* skip relocation */
+
+ move t1, s4 /* t1 <- scratch for copy_loop */
+ la.pcrel t2, __bss_start /* t2 <- source end address */
+
+copy_loop:
+ LONG_L t5, t0, 0
+ PTR_ADDI t0, t0, LONGSIZE
+ LONG_S t5, t1, 0
+ PTR_ADDI t1, t1, LONGSIZE
+ blt t0, t2, copy_loop
+
+/*
+ * Update dynamic relocations after board_init_f
+ */
+fix_rela_dyn:
+ la.pcrel t1, __rel_dyn_start
+ la.pcrel t2, __rel_dyn_end
+ beq t1, t2, clear_bss
+ PTR_ADD t1, t1, s5 /* t1 <- rela_dyn_start in RAM */
+ PTR_ADD t2, t2, s5 /* t2 <- rela_dyn_end in RAM */
+
+6:
+ PTR_L t5, t1, PTRSIZE /* t5 <-- relocation info:type */
+ PTR_LI t3, R_LARCH_RELATIVE /* reloc type R_LARCH_RELATIVE */
+ bne t5, t3, 8f /* skip non-RELATIVE entries */
+ PTR_L t3, t1, 0
+ PTR_L t5, t1, (PTRSIZE * 2) /* t5 <-- addend */
+ PTR_ADD t5, t5, s5 /* t5 <-- location to fix up in RAM */
+ PTR_ADD t3, t3, s5 /* t3 <-- location to fix up in RAM */
+ PTR_S t5, t3, 0
+8:
+ PTR_ADDI t1, t1, (PTRSIZE * 3)
+ blt t1, t2, 6b
+
+
+ /* Update exception entry */
+ la.pcrel t0, exception_entry
+ PTR_ADD t0, t0, s5
+ csrwr t0, LOONGARCH_CSR_EENTRY
+
+clear_bss:
+ la.pcrel t0, __bss_start /* t0 <- rel __bss_start in FLASH */
+ PTR_ADD t0, t0, s5 /* t0 <- rel __bss_start in RAM */
+ la.pcrel t1, __bss_end /* t1 <- rel __bss_end in FLASH */
+ PTR_ADD t1, t1, s5 /* t1 <- rel __bss_end in RAM */
+
+clbss_l:
+ LONG_S zero, t0, 0 /* clear loop... */
+ PTR_ADDI t0, t0, LONGSIZE
+ blt t0, t1, clbss_l
+
+
+/*
+ * We are done. Do not return, instead branch to second part of board
+ * initialization, now running from RAM.
+ */
+call_board_init_r:
+ bl invalidate_icache_all
+ bl flush_dcache_all
+ la.pcrel t0, board_init_r /* offset of board_init_r() */
+ PTR_ADD t4, t0, s5 /* real address of board_init_r() */
+/*
+ * setup parameters for board_init_r
+ */
+ move a0, s3 /* gd_t */
+ move a1, s4 /* dest_addr */
+ move s0, zero /* fp == NULL */
+ jirl ra, t4, 0 /* jump to board_init_r() */
+
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 09/19] LoongArch: Exception handling
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (7 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 08/19] LoongArch: CPU assembly routines Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 10/19] LoongArch: Boot Image bits Yao Zi
` (9 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Add exception entry assembly code, import stackframe.h
from Linux, provide debug prints when exception happens.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Guard show_regs at the callsite
- Provide a macro for $fp offset in pt_regs.regs
- Add help text for SHOW_REGS, make it enabled by default
No functional changes since v1
arch/loongarch/Kconfig | 19 +++
arch/loongarch/cpu/Makefile | 2 +-
arch/loongarch/cpu/genex.S | 21 +++
arch/loongarch/include/asm/stackframe.h | 175 +++++++++++++++++++++
arch/loongarch/lib/interrupts.c | 192 ++++++++++++++++++++++++
5 files changed, 408 insertions(+), 1 deletion(-)
create mode 100644 arch/loongarch/cpu/genex.S
create mode 100644 arch/loongarch/include/asm/stackframe.h
create mode 100644 arch/loongarch/lib/interrupts.c
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 4e8e9d4ee88b..ac4be2c837c0 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -30,6 +30,25 @@ config DMA_ADDR_T_64BIT
bool
default y if 64BIT
+config SHOW_REGS
+ bool "Show registers on unhandled exception"
+ default y
+ help
+ By default only the program counter and the return address register
+ are shown in crash dumps. Enable this symbol to show all registers
+ in main U-Boot.
+
+config FRAMEPOINTER
+ bool "Build with frame pointer for stack unwinding"
+ default y
+ help
+ Choose this option to use the framepointer so the stack can be
+ unwound if needed. This is useful for tracing where faults came
+ from as the source may be several functions back.
+
+ If you say Y here, the code size will increase due to having to
+ store the fp.
+
config STACK_SIZE_SHIFT
int
default 14
diff --git a/arch/loongarch/cpu/Makefile b/arch/loongarch/cpu/Makefile
index d3c38a16d057..6b3dd7ad7d69 100644
--- a/arch/loongarch/cpu/Makefile
+++ b/arch/loongarch/cpu/Makefile
@@ -6,4 +6,4 @@
extra-y = start.o
obj-y += cpu.o
-obj-y += smp_secondary.o
+obj-y += smp_secondary.o genex.o
diff --git a/arch/loongarch/cpu/genex.S b/arch/loongarch/cpu/genex.S
new file mode 100644
index 000000000000..18d183a352b9
--- /dev/null
+++ b/arch/loongarch/cpu/genex.S
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Exception entry for LoongArch CPU
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm.h>
+#include <asm/loongarch.h>
+#include <asm/stackframe.h>
+
+.align 12
+ENTRY(exception_entry)
+ BACKUP_T0T1
+ SAVE_ALL
+ move a0, sp
+ la.pcrel t0, do_exceptions
+ jirl ra, t0, 0
+ RESTORE_ALL_AND_RET
+END(exception_entry)
diff --git a/arch/loongarch/include/asm/stackframe.h b/arch/loongarch/include/asm/stackframe.h
new file mode 100644
index 000000000000..932150afdfaf
--- /dev/null
+++ b/arch/loongarch/include/asm/stackframe.h
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+#ifndef _ASM_STACKFRAME_H
+#define _ASM_STACKFRAME_H
+
+#include <asm/addrspace.h>
+#include <asm/asm.h>
+#include <generated/asm-offsets.h>
+#include <asm/loongarch.h>
+
+/* Make the addition of cfi info a little easier. */
+ .macro cfi_rel_offset reg offset=0 docfi=0
+ .if \docfi
+ .cfi_rel_offset \reg, \offset
+ .endif
+ .endm
+
+ .macro cfi_st reg offset=0 docfi=0
+ cfi_rel_offset \reg, \offset, \docfi
+ LONG_S \reg, sp, \offset
+ .endm
+
+ .macro cfi_restore reg offset=0 docfi=0
+ .if \docfi
+ .cfi_restore \reg
+ .endif
+ .endm
+
+ .macro cfi_ld reg offset=0 docfi=0
+ LONG_L \reg, sp, \offset
+ cfi_restore \reg \offset \docfi
+ .endm
+
+ .macro BACKUP_T0T1
+ csrwr t0, EXCEPTION_KS0
+ csrwr t1, EXCEPTION_KS1
+ .endm
+
+ .macro RELOAD_T0T1
+ csrrd t0, EXCEPTION_KS0
+ csrrd t1, EXCEPTION_KS1
+ .endm
+
+ .macro SAVE_TEMP docfi=0
+ RELOAD_T0T1
+ cfi_st t0, PT_R12, \docfi
+ cfi_st t1, PT_R13, \docfi
+ cfi_st t2, PT_R14, \docfi
+ cfi_st t3, PT_R15, \docfi
+ cfi_st t4, PT_R16, \docfi
+ cfi_st t5, PT_R17, \docfi
+ cfi_st t6, PT_R18, \docfi
+ cfi_st t7, PT_R19, \docfi
+ cfi_st t8, PT_R20, \docfi
+ .endm
+
+ .macro SAVE_STATIC docfi=0
+ cfi_st s0, PT_R23, \docfi
+ cfi_st s1, PT_R24, \docfi
+ cfi_st s2, PT_R25, \docfi
+ cfi_st s3, PT_R26, \docfi
+ cfi_st s4, PT_R27, \docfi
+ cfi_st s5, PT_R28, \docfi
+ cfi_st s6, PT_R29, \docfi
+ cfi_st s7, PT_R30, \docfi
+ cfi_st s8, PT_R31, \docfi
+ .endm
+
+ .macro SAVE_SOME docfi=0
+ PTR_ADDI sp, sp, -PT_SIZE
+ .if \docfi
+ .cfi_def_cfa sp, 0
+ .endif
+ cfi_st t0, PT_R3, \docfi
+ cfi_rel_offset sp, PT_R3, \docfi
+ LONG_S zero, sp, PT_R0
+ csrrd t0, LOONGARCH_CSR_PRMD
+ LONG_S t0, sp, PT_PRMD
+ csrrd t0, LOONGARCH_CSR_CRMD
+ LONG_S t0, sp, PT_CRMD
+ csrrd t0, LOONGARCH_CSR_EUEN
+ LONG_S t0, sp, PT_EUEN
+ csrrd t0, LOONGARCH_CSR_ECFG
+ LONG_S t0, sp, PT_ECFG
+ csrrd t0, LOONGARCH_CSR_ESTAT
+ PTR_S t0, sp, PT_ESTAT
+ cfi_st ra, PT_R1, \docfi
+ cfi_st a0, PT_R4, \docfi
+ cfi_st a1, PT_R5, \docfi
+ cfi_st a2, PT_R6, \docfi
+ cfi_st a3, PT_R7, \docfi
+ cfi_st a4, PT_R8, \docfi
+ cfi_st a5, PT_R9, \docfi
+ cfi_st a6, PT_R10, \docfi
+ cfi_st a7, PT_R11, \docfi
+ csrrd ra, LOONGARCH_CSR_ERA
+ LONG_S ra, sp, PT_ERA
+ .if \docfi
+ .cfi_rel_offset ra, PT_ERA
+ .endif
+ cfi_st tp, PT_R2, \docfi
+ cfi_st fp, PT_R22, \docfi
+ /* Save U0 for sanity */
+ cfi_st u0, PT_R21, \docfi
+ .endm
+
+ .macro SAVE_ALL docfi=0
+ SAVE_SOME \docfi
+ SAVE_TEMP \docfi
+ SAVE_STATIC \docfi
+ .endm
+
+ .macro RESTORE_TEMP docfi=0
+ cfi_ld t0, PT_R12, \docfi
+ cfi_ld t1, PT_R13, \docfi
+ cfi_ld t2, PT_R14, \docfi
+ cfi_ld t3, PT_R15, \docfi
+ cfi_ld t4, PT_R16, \docfi
+ cfi_ld t5, PT_R17, \docfi
+ cfi_ld t6, PT_R18, \docfi
+ cfi_ld t7, PT_R19, \docfi
+ cfi_ld t8, PT_R20, \docfi
+ .endm
+
+ .macro RESTORE_STATIC docfi=0
+ cfi_ld s0, PT_R23, \docfi
+ cfi_ld s1, PT_R24, \docfi
+ cfi_ld s2, PT_R25, \docfi
+ cfi_ld s3, PT_R26, \docfi
+ cfi_ld s4, PT_R27, \docfi
+ cfi_ld s5, PT_R28, \docfi
+ cfi_ld s6, PT_R29, \docfi
+ cfi_ld s7, PT_R30, \docfi
+ cfi_ld s8, PT_R31, \docfi
+ .endm
+
+ .macro RESTORE_SOME docfi=0
+ LONG_L a0, sp, PT_PRMD
+ andi a0, a0, 0x3 /* extract pplv bit */
+ beqz a0, 8f
+ cfi_ld u0, PT_R21, \docfi
+8:
+ LONG_L a0, sp, PT_ERA
+ csrwr a0, LOONGARCH_CSR_ERA
+ LONG_L a0, sp, PT_PRMD
+ csrwr a0, LOONGARCH_CSR_PRMD
+ cfi_ld ra, PT_R1, \docfi
+ cfi_ld a0, PT_R4, \docfi
+ cfi_ld a1, PT_R5, \docfi
+ cfi_ld a2, PT_R6, \docfi
+ cfi_ld a3, PT_R7, \docfi
+ cfi_ld a4, PT_R8, \docfi
+ cfi_ld a5, PT_R9, \docfi
+ cfi_ld a6, PT_R10, \docfi
+ cfi_ld a7, PT_R11, \docfi
+ cfi_ld tp, PT_R2, \docfi
+ cfi_ld fp, PT_R22, \docfi
+ .endm
+
+ .macro RESTORE_SP_AND_RET docfi=0
+ cfi_ld sp, PT_R3, \docfi
+ ertn
+ .endm
+
+ .macro RESTORE_ALL_AND_RET docfi=0
+ RESTORE_STATIC \docfi
+ RESTORE_TEMP \docfi
+ RESTORE_SOME \docfi
+ RESTORE_SP_AND_RET \docfi
+ .endm
+
+#endif /* _ASM_STACKFRAME_H */
diff --git a/arch/loongarch/lib/interrupts.c b/arch/loongarch/lib/interrupts.c
new file mode 100644
index 000000000000..5688e957604c
--- /dev/null
+++ b/arch/loongarch/lib/interrupts.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <linux/compat.h>
+#include <linux/bitfield.h>
+#include <linux/linkage.h>
+#include <hang.h>
+#include <interrupt.h>
+#include <irq_func.h>
+#include <asm/global_data.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/regdef.h>
+#include <asm/loongarch.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define REG_FP 22
+
+static struct resume_data *resume;
+
+void set_resume(struct resume_data *data)
+{
+ resume = data;
+}
+
+static void __maybe_unused show_regs(struct pt_regs *regs)
+{
+ const int field = 2 * sizeof(unsigned long);
+
+#define GPR_FIELD(x) field, regs->regs[x]
+ printf("pc %0*lx ra %0*lx tp %0*lx sp %0*lx\n",
+ field, regs->csr_era, GPR_FIELD(1), GPR_FIELD(2), GPR_FIELD(3));
+ printf("a0 %0*lx a1 %0*lx a2 %0*lx a3 %0*lx\n",
+ GPR_FIELD(4), GPR_FIELD(5), GPR_FIELD(6), GPR_FIELD(7));
+ printf("a4 %0*lx a5 %0*lx a6 %0*lx a7 %0*lx\n",
+ GPR_FIELD(8), GPR_FIELD(9), GPR_FIELD(10), GPR_FIELD(11));
+ printf("t0 %0*lx t1 %0*lx t2 %0*lx t3 %0*lx\n",
+ GPR_FIELD(12), GPR_FIELD(13), GPR_FIELD(14), GPR_FIELD(15));
+ printf("t4 %0*lx t5 %0*lx t6 %0*lx t7 %0*lx\n",
+ GPR_FIELD(16), GPR_FIELD(17), GPR_FIELD(18), GPR_FIELD(19));
+ printf("t8 %0*lx u0 %0*lx s9 %0*lx s0 %0*lx\n",
+ GPR_FIELD(20), GPR_FIELD(21), GPR_FIELD(22), GPR_FIELD(23));
+ printf("s1 %0*lx s2 %0*lx s3 %0*lx s4 %0*lx\n",
+ GPR_FIELD(24), GPR_FIELD(25), GPR_FIELD(26), GPR_FIELD(27));
+ printf("s5 %0*lx s6 %0*lx s7 %0*lx s8 %0*lx\n",
+ GPR_FIELD(28), GPR_FIELD(29), GPR_FIELD(30), GPR_FIELD(31));
+}
+
+static void __maybe_unused show_backtrace(struct pt_regs *regs)
+{
+ uintptr_t *fp = (uintptr_t *)regs->regs[REG_FP];
+ unsigned int count = 0;
+ ulong ra;
+
+ printf("\nbacktrace:\n");
+
+ /*
+ * there are a few entry points where the s0 register is
+ * set to gd, so to avoid changing those, just abort if
+ * the value is the same.
+ */
+ while (fp && fp != (uintptr_t *)gd) {
+ ra = fp[-1];
+ printf("%3d: fp: " REG_FMT " ra: " REG_FMT,
+ count, (ulong)fp, ra);
+
+ if (gd && gd->flags & GD_FLG_RELOC)
+ printf(" - ra: " REG_FMT " reloc adjusted\n",
+ ra - gd->reloc_off);
+ else
+ printf("\n");
+
+ fp = (uintptr_t *)fp[-2];
+ count++;
+ }
+}
+
+static const char *humanize_exc_name(unsigned int ecode, unsigned int esubcode)
+{
+ /*
+ * LoongArch users and developers are probably more familiar with
+ * those names found in the ISA manual, so we are going to print out
+ * the latter. This will require some mapping.
+ */
+ switch (ecode) {
+ case EXCCODE_RSV: return "INT";
+ case EXCCODE_TLBL: return "PIL";
+ case EXCCODE_TLBS: return "PIS";
+ case EXCCODE_TLBI: return "PIF";
+ case EXCCODE_TLBM: return "PME";
+ case EXCCODE_TLBNR: return "PNR";
+ case EXCCODE_TLBNX: return "PNX";
+ case EXCCODE_TLBPE: return "PPI";
+ case EXCCODE_ADE:
+ switch (esubcode) {
+ case EXSUBCODE_ADEF: return "ADEF";
+ case EXSUBCODE_ADEM: return "ADEM";
+ }
+ break;
+ case EXCCODE_ALE: return "ALE";
+ case EXCCODE_BCE: return "BCE";
+ case EXCCODE_SYS: return "SYS";
+ case EXCCODE_BP: return "BRK";
+ case EXCCODE_INE: return "INE";
+ case EXCCODE_IPE: return "IPE";
+ case EXCCODE_FPDIS: return "FPD";
+ case EXCCODE_LSXDIS: return "SXD";
+ case EXCCODE_LASXDIS: return "ASXD";
+ case EXCCODE_FPE:
+ switch (esubcode) {
+ case EXCSUBCODE_FPE: return "FPE";
+ case EXCSUBCODE_VFPE: return "VFPE";
+ }
+ break;
+ case EXCCODE_WATCH:
+ switch (esubcode) {
+ case EXCSUBCODE_WPEF: return "WPEF";
+ case EXCSUBCODE_WPEM: return "WPEM";
+ }
+ break;
+ case EXCCODE_BTDIS: return "BTD";
+ case EXCCODE_BTE: return "BTE";
+ case EXCCODE_GSPR: return "GSPR";
+ case EXCCODE_HVC: return "HVC";
+ case EXCCODE_GCM:
+ switch (esubcode) {
+ case EXCSUBCODE_GCSC: return "GCSC";
+ case EXCSUBCODE_GCHC: return "GCHC";
+ }
+ break;
+ /*
+ * The manual did not mention the EXCCODE_SE case, but print out it
+ * nevertheless.
+ */
+ case EXCCODE_SE: return "SE";
+ }
+
+ return "???";
+}
+
+asmlinkage void do_exceptions(struct pt_regs *regs)
+{
+ unsigned int ecode = FIELD_GET(CSR_ESTAT_EXC, regs->csr_estat);
+ unsigned int esubcode = FIELD_GET(CSR_ESTAT_ESUBCODE, regs->csr_estat);
+
+ printf("Unhandled exception: %s\n", humanize_exc_name(ecode, esubcode));
+
+ printf("ERA: " REG_FMT " ra: " REG_FMT "\n",
+ regs->csr_era, regs->regs[1]);
+ /* Print relocation adjustments, but only if gd is initialized */
+ if (gd && gd->flags & GD_FLG_RELOC)
+ printf("ERA: " REG_FMT " ra: " REG_FMT " reloc adjusted\n",
+ regs->csr_era - gd->reloc_off, regs->regs[1] - gd->reloc_off);
+
+ printf("CRMD: " REG_FMT "\n", regs->csr_crmd);
+ if (ecode >= EXCCODE_TLBL && ecode <= EXCCODE_ALE)
+ printf("BADV: " REG_FMT "\n", regs->csr_badvaddr);
+
+ printf("\n");
+
+#if IS_ENABLED(CONFIG_SHOW_REGS)
+ show_regs(regs);
+#endif
+
+ if (CONFIG_IS_ENABLED(FRAMEPOINTER))
+ show_backtrace(regs);
+
+ panic("\n");
+}
+
+int interrupt_init(void)
+{
+ return 0;
+}
+
+/*
+ * enable interrupts
+ */
+void enable_interrupts(void)
+{
+}
+
+/*
+ * disable interrupts
+ */
+int disable_interrupts(void)
+{
+ return 0;
+}
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 10/19] LoongArch: Boot Image bits
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (8 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 09/19] LoongArch: Exception handling Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 16:20 ` Tom Rini
2026-08-21 8:42 ` [PATCH v3 11/19] LoongArch: Generic platform type Yao Zi
` (8 subsequent siblings)
18 siblings, 1 reply; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Implement loading and booting functions for LoongArch
standard kernel image as per spec.
LoongArch kernel do expect us to fake a efi systemtable
for passing fdt to kernel, we don't need to implement any
EFI functions for kernel because it won't look into anything
beside devicetree from that table if we tell kernel we are
not efi compatible by setting a0 boot argument to zero.
Link: https://docs.kernel.org/arch/loongarch/booting.html
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Use LIB_BOOT[MI] instead of CMD_BOOT[MI] in
arch/loongarch/lib/Makefile
- Drop now redundant definition of board_quiesce_devices() stub
- Replace announce_and_cleanup() with generic bootm_final() in bootm.c
- Remove usage of USB_DEVICE
- Clean up header includes in lib/bootm.c
- Use u-boot/crc.h for CRC32 in lib/bootm.c, select CRC32 for LIB_BOOTM
on LoongArch
- Don't align the generated systab to 64K
- Correctly pass cmdline_start to Linux kernel
- Hang if either OF_LIBFDT is disabled or images->ft_len is zero in
boot_jump_linux()
- Tidy up comments for linux_image_h
- Explain the kernel bug fixed by clearing the highest 4bits of kernel
entry address.
- Clear only the highest 4bits of kernel entry address, instead of
the highest 16bits with TO_PHYS(), to ensure compatibility with
future kernels supporting wider address ranges.
Changed from v1
- Remove now unused arch_lmb_reserve()
arch/loongarch/Kconfig | 3 +
arch/loongarch/lib/Makefile | 2 +
arch/loongarch/lib/bootm.c | 130 ++++++++++++++++++++++++++++++++++++
arch/loongarch/lib/image.c | 77 +++++++++++++++++++++
cmd/Kconfig | 2 +-
5 files changed, 213 insertions(+), 1 deletion(-)
create mode 100644 arch/loongarch/lib/bootm.c
create mode 100644 arch/loongarch/lib/image.c
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index ac4be2c837c0..5654de5a58c7 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -56,4 +56,7 @@ config STACK_SIZE_SHIFT
config OF_BOARD_FIXUP
default y if OF_SEPARATE
+config LIB_BOOTM
+ select CRC32
+
endmenu
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
index 3c17b9cd85af..316503985420 100644
--- a/arch/loongarch/lib/Makefile
+++ b/arch/loongarch/lib/Makefile
@@ -3,6 +3,8 @@
# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
#
+obj-$(CONFIG_$(PHASE_)LIB_BOOTM) += bootm.o
+obj-$(CONFIG_$(PHASE_)LIB_BOOTI) += bootm.o image.o
obj-$(CONFIG_CMD_GO) += boot.o
obj-y += cache.o
obj-y += interrupts.o
diff --git a/arch/loongarch/lib/bootm.c b/arch/loongarch/lib/bootm.c
new file mode 100644
index 000000000000..c0254311b02d
--- /dev/null
+++ b/arch/loongarch/lib/bootm.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <asm/global_data.h>
+#include <bootstage.h>
+#include <bootm.h>
+#include <command.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <dm/root.h>
+#include <efi.h>
+#include <efi_api.h>
+#include <fdt_support.h>
+#include <hang.h>
+#include <image.h>
+#include <linux/sizes.h>
+#include <log.h>
+#include <memalign.h>
+#include <u-boot/crc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const efi_guid_t efi_guid_fdt = EFI_FDT_GUID;
+
+/* LoongArch do expect a EFI style systab */
+static int generate_systab(struct bootm_headers *images)
+{
+ const int nr_cfgtab = 1;
+ struct bd_info *kbd = images->kbd;
+ struct efi_system_table *systab;
+ struct efi_configuration_table *cfgtab;
+ size_t table_size = sizeof(struct efi_system_table) +
+ nr_cfgtab * sizeof(struct efi_configuration_table);
+
+ systab = malloc(table_size);
+ if (!systab) {
+ log_warning("Failed to allocate memory for systab\n");
+ return -ENOMEM;
+ }
+ memset(systab, 0, table_size);
+
+ cfgtab = (void *)systab + sizeof(struct efi_system_table);
+
+ systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
+ systab->hdr.headersize = sizeof(struct efi_system_table);
+ systab->nr_tables = nr_cfgtab;
+ systab->tables = cfgtab;
+ systab->hdr.crc32 = crc32(0, (const unsigned char *)systab,
+ systab->hdr.headersize);
+
+ cfgtab[0].guid = efi_guid_fdt;
+ cfgtab[0].table = images->ft_addr;
+
+ kbd->bi_boot_params = (phys_addr_t)systab;
+
+ return 0;
+}
+
+static void boot_prep_linux(struct bootm_headers *images)
+{
+ if (CONFIG_IS_ENABLED(OF_LIBFDT) && IS_ENABLED(CONFIG_LMB) && images->ft_len) {
+ debug("using: FDT\n");
+ if (image_setup_linux(images)) {
+ printf("FDT creation failed! hanging...");
+ hang();
+ }
+ if (generate_systab(images)) {
+ printf("Failed to generate EFI systab\n");
+ hang();
+ }
+ } else {
+ printf("Device tree not found or missing FDT support\n");
+ hang();
+ }
+}
+
+static void boot_jump_linux(struct bootm_headers *images, int flag)
+{
+ void (*kernel)(ulong efi_boot, char *cmdline, void *systab);
+ int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
+
+ kernel = (void (*)(ulong efi_boot, char *cmdline, void *systab))images->ep;
+
+ bootstage_mark(BOOTSTAGE_ID_RUN_OS);
+
+ debug("## Transferring control to kernel (at address %08lx) ...\n",
+ (ulong)kernel);
+
+ bootm_final(fake);
+ cleanup_before_linux();
+
+ if (!fake) {
+ if (CONFIG_IS_ENABLED(OF_LIBFDT) && images->ft_len) {
+ kernel(0, (char *)images->cmdline_start,
+ (void *)images->kbd->bi_boot_params);
+ } else {
+ printf("Device tree not found or missing FDT support\n");
+ hang();
+ }
+ }
+}
+
+int do_bootm_linux(int flag, struct bootm_info *bmi)
+{
+ struct bootm_headers *images = bmi->images;
+
+ if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
+ return -1;
+
+ if (flag & BOOTM_STATE_OS_PREP) {
+ boot_prep_linux(images);
+ return 0;
+ }
+
+ if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
+ boot_jump_linux(images, flag);
+ return 0;
+ }
+
+ boot_prep_linux(images);
+ boot_jump_linux(images, flag);
+ return 0;
+}
+
+int do_bootm_vxworks(int flag, struct bootm_info *bmi)
+{
+ return do_bootm_linux(flag, bmi);
+}
diff --git a/arch/loongarch/lib/image.c b/arch/loongarch/lib/image.c
new file mode 100644
index 000000000000..ea54345b50ee
--- /dev/null
+++ b/arch/loongarch/lib/image.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ *
+ * Based on riscv/lib/image.c
+ */
+
+#include <asm/global_data.h>
+#include <errno.h>
+#include <image.h>
+#include <linux/bitfield.h>
+#include <linux/sizes.h>
+#include <linux/stddef.h>
+#include <mapmem.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define LINUX_LOONGARCH_IMAGE_MAGIC 0x818223cd
+
+struct linux_image_h {
+ uint32_t code0; /* Executable code */
+ uint32_t code1; /* Executable code */
+ uint64_t kernel_entry; /* Kernel entry point */
+ uint64_t image_size; /* Effective Image size */
+ uint64_t load_offset; /* load offset */
+ uint64_t res1; /* reserved */
+ uint64_t res2; /* reserved */
+ uint64_t res3; /* reserved */
+ uint32_t magic; /* Magic number */
+ uint32_t pe_header; /* Offset to the PE header */
+};
+
+int booti_setup(ulong image, ulong *relocated_addr, ulong *size, ulong *ep,
+ bool force_reloc)
+{
+ struct linux_image_h *lhdr;
+ phys_addr_t ep_phys;
+
+ lhdr = (struct linux_image_h *)map_sysmem(image, 0);
+
+ if (lhdr->magic != LINUX_LOONGARCH_IMAGE_MAGIC) {
+ puts("Bad Linux LoongArch Image magic!\n");
+ return -EINVAL;
+ }
+
+ if (lhdr->image_size == 0) {
+ puts("Image lacks image_size field, error!\n");
+ return -EINVAL;
+ }
+
+ *size = lhdr->image_size;
+ if (force_reloc ||
+ (gd->ram_base <= image && image < gd->ram_base + gd->ram_size)) {
+ *relocated_addr = gd->ram_base + lhdr->load_offset;
+ } else {
+ *relocated_addr = image;
+ }
+
+ /*
+ * Before Linux commit beb2800074c1 ("LoongArch: Fix entry point in
+ * kernel image header"), kernel_entry is filled with a DMW-mapped
+ * virtual address instead of a physical address, we must convert it
+ * back to physical address.
+ *
+ * On loongarch64, the lowest 60 bits of DMW-mapped address are
+ * identical to the physical address, and the highest 4 bits are for
+ * determining access privileges and types. So clearing the highest 4
+ * bits works around the issue, and is a no-op since the length of
+ * physical addresses never exceed 60 bits.
+ */
+ ep_phys = lhdr->kernel_entry & GENMASK(59, 0);
+ *ep = *relocated_addr + (ep_phys - lhdr->load_offset);
+
+ unmap_sysmem(lhdr);
+
+ return 0;
+}
diff --git a/cmd/Kconfig b/cmd/Kconfig
index b724f4f8d496..a18953a0f111 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -395,7 +395,7 @@ config CMD_BOOTZ
config CMD_BOOTI
bool "booti"
- depends on ARM64 || RISCV || SANDBOX
+ depends on ARM64 || LOONGARCH || RISCV || SANDBOX
depends on LMB
default y
select LIB_BOOTI
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 11/19] LoongArch: Generic platform type
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (9 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 10/19] LoongArch: Boot Image bits Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 12/19] cpu: Add loongarch_cpu driver Yao Zi
` (7 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Provide a generic platform with some common routines expected to be
implemented at CPU level.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Select CPU if DISPLAY_INFO is enabled
- Reword the commit message, re-titled as "LoongArch: Generic platform
type"
- Fix the comment for cleanup_before_linux() to note that cache isn't
disabled, captilize Linux
- Drop unused DECLARE_GLOBAL_DATA_PTR from cpu/generic/dram.c
No changes since v1
arch/loongarch/Kconfig | 1 +
arch/loongarch/cpu/generic/Kconfig | 13 +++++++++++++
arch/loongarch/cpu/generic/Makefile | 7 +++++++
arch/loongarch/cpu/generic/cpu.c | 22 ++++++++++++++++++++++
arch/loongarch/cpu/generic/dram.c | 16 ++++++++++++++++
5 files changed, 59 insertions(+)
create mode 100644 arch/loongarch/cpu/generic/Kconfig
create mode 100644 arch/loongarch/cpu/generic/Makefile
create mode 100644 arch/loongarch/cpu/generic/cpu.c
create mode 100644 arch/loongarch/cpu/generic/dram.c
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 5654de5a58c7..c5ef82b583b1 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -12,6 +12,7 @@ endchoice
# board-specific options below
# platform-specific options below
+source "arch/loongarch/cpu/generic/Kconfig"
# architecture-specific options below
choice
diff --git a/arch/loongarch/cpu/generic/Kconfig b/arch/loongarch/cpu/generic/Kconfig
new file mode 100644
index 000000000000..5fcc2156906d
--- /dev/null
+++ b/arch/loongarch/cpu/generic/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
+config GENERIC_LOONGARCH
+ bool
+ select SYS_CACHE_SHIFT_6
+ imply CPU
+ imply CPU_LOONGARCH
+ imply LOONGARCH_TIMER
+ imply CMD_CPU
+ select CPU if DISPLAY_CPUINFO
diff --git a/arch/loongarch/cpu/generic/Makefile b/arch/loongarch/cpu/generic/Makefile
new file mode 100644
index 000000000000..c98d63b4f831
--- /dev/null
+++ b/arch/loongarch/cpu/generic/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
+obj-y += dram.o
+obj-y += cpu.o
diff --git a/arch/loongarch/cpu/generic/cpu.c b/arch/loongarch/cpu/generic/cpu.c
new file mode 100644
index 000000000000..7eae927b0003
--- /dev/null
+++ b/arch/loongarch/cpu/generic/cpu.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <irq_func.h>
+#include <asm/cache.h>
+
+/*
+ * cleanup_before_linux() is called just before we call Linux, it prepares the
+ * processor for linux
+ *
+ * We disable interrupts and flush caches.
+ */
+int cleanup_before_linux(void)
+{
+ disable_interrupts();
+
+ cache_flush();
+
+ return 0;
+}
diff --git a/arch/loongarch/cpu/generic/dram.c b/arch/loongarch/cpu/generic/dram.c
new file mode 100644
index 000000000000..26cabc4b3ccf
--- /dev/null
+++ b/arch/loongarch/cpu/generic/dram.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <fdtdec.h>
+
+int dram_init(void)
+{
+ return fdtdec_setup_mem_size_base_lowest();
+}
+
+int dram_init_banksize(void)
+{
+ return fdtdec_setup_memory_banksize();
+}
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 12/19] cpu: Add loongarch_cpu driver
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (10 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 11/19] LoongArch: Generic platform type Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 13/19] timer: Add loongarch_timer driver Yao Zi
` (6 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Implement a driver for LoongArch CPU solely for gathering
some information bits from FDT and CPU level config registers.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Fall through to devicetree path in loongarch_cpu_get_desc() when
probing with CPUCFG gets no meaningful results, instead of handling
such cases with goto
- Replace open-coded copying loop with memcpy() in
loongarch_cpu_get_desc()
- Correctly return -ENOSPC when snprintf() truncates the string in
loongarch_cpu_get_desc()
Changed from v1
- Drop unnecessary check against -ENOTSUPP clk_enable()'s return value
in loongarch_cpu_probe()
drivers/cpu/Kconfig | 6 ++
drivers/cpu/Makefile | 1 +
drivers/cpu/loongarch_cpu.c | 142 ++++++++++++++++++++++++++++++++++++
3 files changed, 149 insertions(+)
create mode 100644 drivers/cpu/loongarch_cpu.c
diff --git a/drivers/cpu/Kconfig b/drivers/cpu/Kconfig
index c805c0bbfa19..9fd43ff88fde 100644
--- a/drivers/cpu/Kconfig
+++ b/drivers/cpu/Kconfig
@@ -13,6 +13,12 @@ config CPU_IMX
help
Support CPU cores for SoCs of the i.MX series.
+config CPU_LOONGARCH
+ bool "Enable LoongArch CPU driver"
+ depends on CPU && LOONGARCH
+ help
+ Support CPU cores for LoongArch processors.
+
config CPU_MPC83XX
bool "Enable MPC83xx CPU driver"
depends on CPU && MPC83xx
diff --git a/drivers/cpu/Makefile b/drivers/cpu/Makefile
index eaf494706e2c..d9c0db74dd5a 100644
--- a/drivers/cpu/Makefile
+++ b/drivers/cpu/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_ARCH_AT91) += at91_cpu.o
obj-$(CONFIG_ARCH_MEDIATEK) += mtk_cpu.o
obj-$(CONFIG_CPU_ARMV8) += armv8_cpu.o
obj-$(CONFIG_CPU_IMX) += imx8_cpu.o
+obj-$(CONFIG_CPU_LOONGARCH) += loongarch_cpu.o
obj-$(CONFIG_CPU_MPC83XX) += mpc83xx_cpu.o
obj-$(CONFIG_CPU_RISCV) += riscv_cpu.o
obj-$(CONFIG_CPU_MICROBLAZE) += microblaze_cpu.o
diff --git a/drivers/cpu/loongarch_cpu.c b/drivers/cpu/loongarch_cpu.c
new file mode 100644
index 000000000000..74a80f9e79a4
--- /dev/null
+++ b/drivers/cpu/loongarch_cpu.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <clk.h>
+#include <cpu.h>
+#include <dm.h>
+#include <errno.h>
+#include <log.h>
+#include <asm/loongarch.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
+
+static int loongarch_cpu_get_desc(const struct udevice *dev, char *buf, int size)
+{
+ const char *cpu;
+
+ /* We try to get CPU name from IOCSR first */
+ if ((read_cpucfg(LOONGARCH_CPUCFG1) & CPUCFG1_IOCSR)) {
+ char vendor_buf[9] = { 0 };
+ char name_buf[9] = { 0 };
+ u64 vendor = iocsr_read64(LOONGARCH_IOCSR_VENDOR);
+ u64 name = iocsr_read64(LOONGARCH_IOCSR_CPUNAME);
+
+ if (vendor && name) {
+ int ret;
+
+ memcpy(vendor_buf, &vendor, sizeof(vendor));
+ memcpy(name_buf, &name, sizeof(name));
+
+ ret = snprintf(buf, size, "%s-%s", vendor_buf, name_buf);
+ return ret >= size ? -ENOSPC : 0;
+ }
+ }
+
+ cpu = dev_read_string(dev, "compatible");
+ if (!cpu || size < (strlen(cpu) + 1))
+ return -ENOSPC;
+
+ strcpy(buf, cpu);
+
+ return 0;
+}
+
+static int loongarch_cpu_get_info(const struct udevice *dev, struct cpu_info *info)
+{
+ int ret;
+ struct clk clk;
+
+ /* First try getting the frequency from the assigned clock */
+ ret = clk_get_by_index((struct udevice *)dev, 0, &clk);
+ if (!ret) {
+ ret = clk_get_rate(&clk);
+ if (!IS_ERR_VALUE(ret))
+ info->cpu_freq = ret;
+ }
+
+ if (!info->cpu_freq)
+ dev_read_u32(dev, "clock-frequency", (u32 *)&info->cpu_freq);
+
+ if (read_cpucfg(LOONGARCH_CPUCFG1) & CPUCFG1_PAGING)
+ info->features |= BIT(CPU_FEAT_MMU);
+
+ if (read_cpucfg(LOONGARCH_CPUCFG16) & CPUCFG16_L1_IUPRE)
+ info->features |= BIT(CPU_FEAT_L1_CACHE);
+
+ return 0;
+}
+
+static int loongarch_cpu_get_count(const struct udevice *dev)
+{
+ ofnode node;
+ int num = 0;
+
+ ofnode_for_each_subnode(node, dev_ofnode(dev->parent)) {
+ const char *device_type;
+
+ /* skip if core is marked as not available in the device tree */
+ if (!ofnode_is_enabled(node))
+ continue;
+
+ device_type = ofnode_read_string(node, "device_type");
+ if (!device_type)
+ continue;
+ if (strcmp(device_type, "cpu") == 0)
+ num++;
+ }
+
+ return num;
+}
+
+static int loongarch_cpu_bind(struct udevice *dev)
+{
+ struct cpu_plat *plat = dev_get_parent_plat(dev);
+
+ plat->cpu_id = dev_read_addr(dev);
+
+ return 0;
+}
+
+static int loongarch_cpu_probe(struct udevice *dev)
+{
+ int ret = 0;
+ struct clk clk;
+
+ /* Get a clock if it exists */
+ ret = clk_get_by_index(dev, 0, &clk);
+ if (ret)
+ return 0;
+
+ ret = clk_enable(&clk);
+ if (ret == -ENOSYS)
+ return 0;
+ else
+ return ret;
+}
+
+static const struct cpu_ops loongarch_cpu_ops = {
+ .get_desc = loongarch_cpu_get_desc,
+ .get_info = loongarch_cpu_get_info,
+ .get_count = loongarch_cpu_get_count,
+};
+
+static const struct udevice_id loongarch_cpu_ids[] = {
+ { .compatible = "loongarch,Loongson-3A5000" }, /* From QEMU, undocumented */
+ { .compatible = "loongson,la264" },
+ { .compatible = "loongson,la364" },
+ { }
+};
+
+U_BOOT_DRIVER(loongarch_cpu) = {
+ .name = "loongarch_cpu",
+ .id = UCLASS_CPU,
+ .of_match = loongarch_cpu_ids,
+ .bind = loongarch_cpu_bind,
+ .probe = loongarch_cpu_probe,
+ .ops = &loongarch_cpu_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 13/19] timer: Add loongarch_timer driver
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (11 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 12/19] cpu: Add loongarch_cpu driver Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 14/19] board: emulation: Add qemu-loongarch Yao Zi
` (5 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Implement a timer driver for LoongArch architecture timer. It's synced
in hardware for every core in a system, and frequency information can be
gathered from CPUCFG instruction.
It is not described in fdt, thus a DRVINFO is declared for it. During
probing, stability of the timer frequency is checked through CPUCFG, and
the probing would fail if it isn't constant.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- include div64.h for definition of lldiv()
- Rename loongarch_timer_bind() to loongarch_timer_probe(), to correctly
reflect that it's used in the probe() callback
- Bail out with -ENODEV when missing LLFTP support, which means there
isn't a timer with stable frequency
No changes from v1
drivers/timer/Kconfig | 8 ++
drivers/timer/Makefile | 1 +
drivers/timer/loongarch_timer.c | 132 ++++++++++++++++++++++++++++++++
3 files changed, 141 insertions(+)
create mode 100644 drivers/timer/loongarch_timer.c
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index 500a25638a96..6feb53328147 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -348,4 +348,12 @@ config GOLDFISH_TIMER
It uses the Goldfish RTC hardware to provide a nanosecond-resolution
timer, commonly found in QEMU virt machines.
+config LOONGARCH_TIMER
+ bool "LoongArch CPU timer support"
+ depends on TIMER
+ depends on LOONGARCH
+ help
+ Select this to enable support for the timer found on
+ LoongArch CPUs.
+
endmenu
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index d8b3f2b65d4c..0b70b915bfeb 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -37,3 +37,4 @@ obj-$(CONFIG_IMX_GPT_TIMER) += imx-gpt-timer.o
obj-$(CONFIG_XILINX_TIMER) += xilinx-timer.o
obj-$(CONFIG_STARFIVE_TIMER) += starfive-timer.o
obj-$(CONFIG_GOLDFISH_TIMER) += goldfish_timer.o
+obj-$(CONFIG_LOONGARCH_TIMER) += loongarch_timer.o
diff --git a/drivers/timer/loongarch_timer.c b/drivers/timer/loongarch_timer.c
new file mode 100644
index 000000000000..c294112abe19
--- /dev/null
+++ b/drivers/timer/loongarch_timer.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <asm/loongarch.h>
+#include <div64.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <errno.h>
+#include <timer.h>
+
+static u64 notrace loongarch_timer_get_count(struct udevice *dev)
+{
+ u32 hi, lo;
+
+ if (IS_ENABLED(CONFIG_64BIT))
+ return drdtime();
+
+ do {
+ hi = rdtimeh();
+ lo = rdtimel();
+ } while (hi != rdtimeh());
+
+ return ((u64)hi << 32) | lo;
+}
+
+static int loongarch_timer_get_freq_cpucfg(unsigned int *freq)
+{
+ unsigned int res;
+ unsigned int base_freq;
+ unsigned int cfm, cfd;
+
+ res = read_cpucfg(LOONGARCH_CPUCFG2);
+ if (!(res & CPUCFG2_LLFTP))
+ return -ENODEV;
+
+ base_freq = read_cpucfg(LOONGARCH_CPUCFG4);
+ res = read_cpucfg(LOONGARCH_CPUCFG5);
+ cfm = res & 0xffff;
+ cfd = (res >> 16) & 0xffff;
+
+ if (!base_freq || !cfm || !cfd)
+ return -EINVAL;
+
+ *freq = base_freq * cfm / cfd;
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_TIMER_EARLY)
+/**
+ * timer_early_get_rate() - Get the timer rate before driver model
+ */
+unsigned long notrace timer_early_get_rate(void)
+{
+ unsigned int freq;
+ int ret = loongarch_timer_get_freq_cpucfg(&freq);
+
+ if (ret)
+ panic("Failed to read timer frequency from cpucfg: %d\n", ret);
+
+ return freq;
+}
+
+/**
+ * timer_early_get_count() - Get the timer count before driver model
+ *
+ */
+u64 notrace timer_early_get_count(void)
+{
+ return loongarch_timer_get_count(NULL);
+}
+#endif
+
+#if CONFIG_IS_ENABLED(BOOTSTAGE)
+ulong timer_get_boot_us(void)
+{
+ int ret;
+ u64 ticks = 0;
+ u32 rate;
+
+ ret = dm_timer_init();
+ if (!ret) {
+ rate = timer_get_rate(gd->timer);
+ timer_get_count(gd->timer, &ticks);
+ } else {
+ ret = loongarch_timer_get_freq_cpucfg(&rate);
+ if (ret)
+ panic("failed to read timer frequency from cpucfg: %d\n", ret);
+
+ ticks = loongarch_timer_get_count(NULL);
+ }
+
+ /* Below is converted from time(us) = (tick / rate) * 1000000 */
+ return lldiv(ticks * 1000, (rate / 1000));
+}
+#endif
+
+static int loongarch_timer_probe(struct udevice *dev)
+{
+ struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ unsigned int rate;
+ int ret;
+
+ ret = loongarch_timer_get_freq_cpucfg(&rate);
+ if (ret < 0) {
+ dev_err(dev, "failed to read timer frequency from cpucfg: %d\n",
+ ret);
+ return ret;
+ }
+
+ uc_priv->clock_rate = rate;
+
+ return 0;
+}
+
+static const struct timer_ops loongarch_timer_ops = {
+ .get_count = loongarch_timer_get_count,
+};
+
+U_BOOT_DRIVER(loongarch_timer) = {
+ .name = "loongarch_timer",
+ .id = UCLASS_TIMER,
+ .probe = loongarch_timer_probe,
+ .ops = &loongarch_timer_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
+
+U_BOOT_DRVINFO(loongarch_timer) = {
+ .name = "loongarch_timer",
+};
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 14/19] board: emulation: Add qemu-loongarch
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (12 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 13/19] timer: Add loongarch_timer driver Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 16:20 ` Tom Rini
2026-08-21 8:42 ` [PATCH v3 15/19] efi: LoongArch: Define LoongArch bits everywhere Yao Zi
` (4 subsequent siblings)
18 siblings, 1 reply; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Yet another generic QEMU VIRT machine.
LoongArch QEMU splits the main RAM into two parts: the first 512M is
placed at 0x0, and the rest is placed at 0x8000000. FDT locates at
0x100000. BIOS is mapped to the first flash mapped to 0x1c000000, where
U-Boot starts execution.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Add board-level documentation for qemu-loongarch
- Mention the memory layout and booting process in commit message
- Move TARGET_QEMU_LOONGARCH_VIRT to
board/emulation/qemu-loongarch/Kconfig
- Drop duplicated selection of BOARD_LATE_INIT in
TARGET_QEMU_LOONGARCH_VIRT
- Explain why RAM is limited to the lowest 4GiB
- Drop unused board_init()
- Rework comment in board_fdt_blob_setup()
- Define FDT address, 0x100000, as a meaningful constant
- Clarify how CFG_SYS_INIT_RAM_[ADDR,SIZE] are chosen
- Add myself to MAINTAINERS
Changed from v1
- Remove dynamic setup for environment variables
arch/loongarch/Kconfig | 4 ++
arch/loongarch/dts/qemu-loongarch64.dts | 9 +++
board/emulation/qemu-loongarch/Kconfig | 68 +++++++++++++++++++
board/emulation/qemu-loongarch/MAINTAINERS | 9 +++
board/emulation/qemu-loongarch/Makefile | 6 ++
.../emulation/qemu-loongarch/qemu-loongarch.c | 67 ++++++++++++++++++
.../qemu-loongarch/qemu-loongarch.env | 5 ++
configs/qemu-loongarch64_defconfig | 36 ++++++++++
doc/board/emulation/index.rst | 1 +
doc/board/emulation/qemu-loongarch.rst | 39 +++++++++++
include/configs/qemu-loongarch.h | 17 +++++
11 files changed, 261 insertions(+)
create mode 100644 arch/loongarch/dts/qemu-loongarch64.dts
create mode 100644 board/emulation/qemu-loongarch/Kconfig
create mode 100644 board/emulation/qemu-loongarch/MAINTAINERS
create mode 100644 board/emulation/qemu-loongarch/Makefile
create mode 100644 board/emulation/qemu-loongarch/qemu-loongarch.c
create mode 100644 board/emulation/qemu-loongarch/qemu-loongarch.env
create mode 100644 configs/qemu-loongarch64_defconfig
create mode 100644 doc/board/emulation/qemu-loongarch.rst
create mode 100644 include/configs/qemu-loongarch.h
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index c5ef82b583b1..ca7f0adb1496 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -7,9 +7,13 @@ config SYS_ARCH
choice
prompt "Target select"
+config TARGET_QEMU_LOONGARCH_VIRT
+ bool "Support QEMU Virt Board"
+
endchoice
# board-specific options below
+source "board/emulation/qemu-loongarch/Kconfig"
# platform-specific options below
source "arch/loongarch/cpu/generic/Kconfig"
diff --git a/arch/loongarch/dts/qemu-loongarch64.dts b/arch/loongarch/dts/qemu-loongarch64.dts
new file mode 100644
index 000000000000..39d303798fcb
--- /dev/null
+++ b/arch/loongarch/dts/qemu-loongarch64.dts
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+/dts-v1/;
+
+/ {
+};
diff --git a/board/emulation/qemu-loongarch/Kconfig b/board/emulation/qemu-loongarch/Kconfig
new file mode 100644
index 000000000000..94f42091e0be
--- /dev/null
+++ b/board/emulation/qemu-loongarch/Kconfig
@@ -0,0 +1,68 @@
+if TARGET_QEMU_LOONGARCH_VIRT
+
+config SYS_BOARD
+ default "qemu-loongarch"
+
+config SYS_VENDOR
+ default "emulation"
+
+config SYS_CPU
+ default "generic"
+
+config SYS_CONFIG_NAME
+ default "qemu-loongarch"
+
+config TEXT_BASE
+ default 0x1c000000
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+ def_bool y
+ select GENERIC_LOONGARCH
+ imply AHCI
+ imply PCI_INIT_R
+ imply CMD_PCI
+ imply CMD_POWEROFF
+ imply CMD_SCSI
+ imply CMD_PING
+ imply CMD_EXT2
+ imply CMD_EXT4
+ imply CMD_FAT
+ imply CMD_FS_GENERIC
+ imply DOS_PARTITION
+ imply ISO_PARTITION
+ imply EFI_PARTITION
+ imply SCSI_AHCI
+ imply AHCI_PCI
+ imply E1000
+ imply PCI
+ imply NVME_PCI
+ imply PCIE_ECAM_GENERIC
+ imply DM_RNG
+ imply DM_RTC
+ imply QFW
+ imply QFW_MMIO
+ imply SCSI
+ imply SYS_NS16550
+ imply SYSRESET
+ imply SYSRESET_CMD_POWEROFF
+ imply SYSRESET_SYSCON
+ imply VIRTIO_MMIO
+ imply VIRTIO_PCI
+ imply VIRTIO_NET
+ imply VIRTIO_BLK
+ imply MTD_NOR_FLASH
+ imply CFI_FLASH
+ imply OF_HAS_PRIOR_STAGE
+ imply VIDEO
+ imply VIDEO_BOCHS
+ imply SYS_WHITE_ON_BLACK
+ imply USB
+ imply USB_XHCI_HCD
+ imply USB_XHCI_PCI
+ imply USB_KEYBOARD
+ imply CMD_USB
+ imply UFS
+ imply UFS_PCI
+ imply BOARD_LATE_INIT
+
+endif
diff --git a/board/emulation/qemu-loongarch/MAINTAINERS b/board/emulation/qemu-loongarch/MAINTAINERS
new file mode 100644
index 000000000000..cd9636d6dc9b
--- /dev/null
+++ b/board/emulation/qemu-loongarch/MAINTAINERS
@@ -0,0 +1,9 @@
+QEMU LOONGARCH 'VIRT' BOARD
+M: Jiaxun Yang <jiaxun.yang@flygoat.com>
+M: Yao Zi <me@ziyao.cc>
+S: Maintained
+F: board/emulation/qemu-loongarch/
+F: board/emulation/common/
+F: include/configs/qemu-loongarch.h
+F: configs/qemu-loongarch64_defconfig
+F: doc/board/emulation/qemu-loongarch.rst
diff --git a/board/emulation/qemu-loongarch/Makefile b/board/emulation/qemu-loongarch/Makefile
new file mode 100644
index 000000000000..a928b90780e9
--- /dev/null
+++ b/board/emulation/qemu-loongarch/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2024 Jiaxun yang <jiaxun.yang@flygoat.com>
+#
+
+obj-y += qemu-loongarch.o
diff --git a/board/emulation/qemu-loongarch/qemu-loongarch.c b/board/emulation/qemu-loongarch/qemu-loongarch.c
new file mode 100644
index 000000000000..56e83fa17be0
--- /dev/null
+++ b/board/emulation/qemu-loongarch/qemu-loongarch.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <dm.h>
+#include <dm/ofnode.h>
+#include <env.h>
+#include <fdtdec.h>
+#include <image.h>
+#include <linux/sizes.h>
+#include <lmb.h>
+#include <log.h>
+#include <spl.h>
+#include <init.h>
+#include <usb.h>
+#include <virtio_types.h>
+#include <virtio.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define VIRT_FDT_BASE 0x100000
+
+#if IS_ENABLED(CONFIG_MTD_NOR_FLASH)
+int is_flash_available(void)
+{
+ if (!ofnode_equal(ofnode_by_compatible(ofnode_null(), "cfi-flash"),
+ ofnode_null()))
+ return 1;
+
+ return 0;
+}
+#endif
+
+phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
+{
+ /*
+ * Limit RAM used by U-Boot to 4GiB to keep compatible with 32-bit-only
+ * DMA peripherals, for example, emulated PCI cards.
+ */
+ if (gd->ram_top > 0x10000000)
+ return 0x10000000;
+
+ return gd->ram_top;
+}
+
+int board_late_init(void)
+{
+ /* start usb so that usb keyboard can be used as input device */
+ if (CONFIG_IS_ENABLED(USB_KEYBOARD))
+ usb_init();
+
+ /*
+ * Make sure virtio bus is enumerated so that peripherals
+ * on the virtio bus can be discovered by their drivers
+ */
+ virtio_init();
+
+ return 0;
+}
+
+int board_fdt_blob_setup(void **fdtp)
+{
+ /* QEMU stores the DTB to 0x100000 */
+ *fdtp = (void *)VIRT_FDT_BASE;
+ return 0;
+}
diff --git a/board/emulation/qemu-loongarch/qemu-loongarch.env b/board/emulation/qemu-loongarch/qemu-loongarch.env
new file mode 100644
index 000000000000..7655f26d8d6b
--- /dev/null
+++ b/board/emulation/qemu-loongarch/qemu-loongarch.env
@@ -0,0 +1,5 @@
+stdin=serial,usbkbd
+stdout=serial,vidconsole
+stderr=serial,vidconsole
+
+boot_targets=qfw usb scsi virtio nvme dhcp
diff --git a/configs/qemu-loongarch64_defconfig b/configs/qemu-loongarch64_defconfig
new file mode 100644
index 000000000000..d7f9c4338486
--- /dev/null
+++ b/configs/qemu-loongarch64_defconfig
@@ -0,0 +1,36 @@
+CONFIG_LOONGARCH=y
+CONFIG_SYS_MALLOC_LEN=0x800000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_NR_DRAM_BANKS=8
+CONFIG_ENV_SIZE=0x20000
+CONFIG_DEFAULT_DEVICE_TREE="qemu-loongarch64"
+CONFIG_DM_RESET=y
+CONFIG_SYS_LOAD_ADDR=0x02000000
+CONFIG_SHOW_REGS=y
+# CONFIG_OF_BOARD_FIXUP is not set
+CONFIG_SYS_PCI_64BIT=y
+CONFIG_FIT=y
+CONFIG_BOOTSTD_FULL=y
+CONFIG_SYS_BOOTM_LEN=0x4000000
+CONFIG_USE_BOOTARGS=y
+CONFIG_BOOTARGS_SUBST=y
+CONFIG_DISPLAY_CPUINFO=y
+CONFIG_DISPLAY_BOARDINFO=y
+# CONFIG_CMD_MII is not set
+CONFIG_CMD_2048=y
+CONFIG_CMD_RTC=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_SYSBOOT=y
+CONFIG_CMD_QFW=y
+CONFIG_PARTITION_TYPE_GUID=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_BLKMAP=y
+CONFIG_EFI_MEDIA=y
+CONFIG_DM_MMC=y
+CONFIG_DM_MTD=y
+CONFIG_FLASH_SHOW_PROGRESS=0
+CONFIG_SYS_MAX_FLASH_BANKS=2
+CONFIG_PCI_REGION_MULTI_ENTRY=y
+CONFIG_DM_REBOOT_MODE=y
+CONFIG_RESET_SYSCON=y
+CONFIG_HEXDUMP=y
diff --git a/doc/board/emulation/index.rst b/doc/board/emulation/index.rst
index 5d0dd83d8aca..a142cd3360ac 100644
--- a/doc/board/emulation/index.rst
+++ b/doc/board/emulation/index.rst
@@ -11,6 +11,7 @@ Emulation
network
video
qemu-arm
+ qemu-loongarch
qemu-mips
qemu-ppce500
qemu-riscv
diff --git a/doc/board/emulation/qemu-loongarch.rst b/doc/board/emulation/qemu-loongarch.rst
new file mode 100644
index 000000000000..0d97dc7df797
--- /dev/null
+++ b/doc/board/emulation/qemu-loongarch.rst
@@ -0,0 +1,39 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+.. Copyright (C) 2026 Yao Zi <me@ziyao.cc>
+
+QEMU LoongArch
+==============
+
+QEMU for LoongArch supports a special 'virt' machine designed for emulation
+and virtualization purpose. This document describes how to run U-Boot under it.
+Only 64-bit LoongArch is supported at this time.
+
+The 'virt' platform provides the following as the basic functionality:
+
+ - A freely configurable amount of CPU cores
+ - U-Boot loaded and executing in the emulated flash, mapped to 0x1c000000.
+ - A generated device tree blob placed at 0x100000.
+ - A freely configurable amount of RAM, described by the DTB, starting at
+ 0x0. RAM above 512MiB is placed at 0x80000000.
+ - A NS16550A serial port, discoverable via the DTB.
+ - An in-core constant frequency timer.
+ - syscon-reboot and syscon-poweroff for powering off and rebooting the
+ system.
+ - A generic ECAM-based PCI host controller, discoverable via the DTB.
+
+Additionally, a number of optional peripherals can be added to the PCI bus.
+
+See :doc:`../../develop/devicetree/dt_qemu` for information on how to see the
+devicetree actually generated by QEMU.
+
+Building and Running
+--------------------
+
+Set the CROSS_COMPILE environment variable as usual, and run::
+
+ make qemu-loongarch64_defconfig
+ make
+
+The minimal QEMU command line to get U-Boot up and running is::
+
+ qemu-system-loongarch64 -M virt -nographic -bios u-boot.bin
diff --git a/include/configs/qemu-loongarch.h b/include/configs/qemu-loongarch.h
new file mode 100644
index 000000000000..7103dc1b02ef
--- /dev/null
+++ b/include/configs/qemu-loongarch.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+/*
+ * LoongArch QEMU always places a part of the RAM at 0x0. These options are only
+ * intended to specify the initial stack pointer address, and can be replaced
+ * with CUSTOM_SYS_INIT_SP_ADDR when it's supported in the future.
+ */
+#define CFG_SYS_INIT_RAM_ADDR 0x0
+#define CFG_SYS_INIT_RAM_SIZE 0x80000
+
+#endif
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 15/19] efi: LoongArch: Define LoongArch bits everywhere
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (13 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 14/19] board: emulation: Add qemu-loongarch Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 16/19] efi: LoongArch: Implement everything Yao Zi
` (3 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Add PE machine type, removable boot image name, vendor class identifier,
client architecture identifier, relative ELF relocation, and undefined
instruction for LoongArch. They are all coming from UEFI specification,
PE-COFF specification, or IANA websites.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Describe what has been added in commit message
- Drop extra paretheses in elif condition in config_distro_bootcmd.h
- Define IMAGE_REL_BASED_LOONGARCH32_MARK_LA as well in include/pe.h
Changed from v1
- Reword commit message, replacing "PE spec" with "PE-COFF specification"
- Replace obsolete __loongarch64 macro with __loongarch__ and
__loongarch_grlen
- Use a true undefined instruction in efi_selftest_miniapp_exception.c
- Define HOST_BOOTEFI_NAME and HOST_PXE_ARCH
- Introduce definition for IMAGE_REL_BASEd_LOONGARCH64_MARK_LA
include/asm-generic/pe.h | 2 ++
include/config_distro_bootcmd.h | 5 +++++
include/pe.h | 2 ++
lib/efi_loader/efi_helper.c | 4 ++++
lib/efi_loader/efi_image_loader.c | 7 +++++++
lib/efi_loader/efi_runtime.c | 4 ++++
lib/efi_selftest/efi_selftest_miniapp_exception.c | 3 +++
7 files changed, 27 insertions(+)
diff --git a/include/asm-generic/pe.h b/include/asm-generic/pe.h
index cd5b6ad62bf0..fb93f2621715 100644
--- a/include/asm-generic/pe.h
+++ b/include/asm-generic/pe.h
@@ -38,6 +38,8 @@
#define IMAGE_FILE_MACHINE_ARM64 0xaa64
#define IMAGE_FILE_MACHINE_RISCV32 0x5032
#define IMAGE_FILE_MACHINE_RISCV64 0x5064
+#define IMAGE_FILE_MACHINE_LOONGARCH32 0x6232
+#define IMAGE_FILE_MACHINE_LOONGARCH64 0x6264
/* Header magic constants */
#define IMAGE_NT_OPTIONAL_HDR32_MAGIC 0x010b
diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h
index 8d6f80a0ce5c..0eb6bd742b9f 100644
--- a/include/config_distro_bootcmd.h
+++ b/include/config_distro_bootcmd.h
@@ -118,6 +118,8 @@
#define BOOTEFI_NAME "bootriscv32.efi"
#elif defined(CONFIG_ARCH_RV64I)
#define BOOTEFI_NAME "bootriscv64.efi"
+#elif defined(CONFIG_ARCH_LA64)
+#define BOOTEFI_NAME "bootloongarch64.efi"
#endif
#endif
@@ -371,6 +373,9 @@
#elif defined(CONFIG_ARCH_RV64I) || ((defined(__riscv) && __riscv_xlen == 64))
#define BOOTENV_EFI_PXE_ARCH "0x1b"
#define BOOTENV_EFI_PXE_VCI "PXEClient:Arch:00027:UNDI:003000"
+#elif defined(CONFIG_ARCH_LA64) || (defined(__loongarch__) && __loongarch_grlen == 64)
+#define BOOTENV_EFI_PXE_ARCH "0x27"
+#define BOOTENV_EFI_PXE_VCI "PXEClient:Arch:00039:UNDI:003000"
#elif defined(CONFIG_SANDBOX)
# error "sandbox EFI support is only supported on ARM and x86"
#else
diff --git a/include/pe.h b/include/pe.h
index 086f2b860e99..eac9eb25ce47 100644
--- a/include/pe.h
+++ b/include/pe.h
@@ -194,6 +194,8 @@ typedef struct _IMAGE_RELOCATION
#define IMAGE_REL_BASED_THUMB_MOV32 7 /* yes, 7 too */
#define IMAGE_REL_BASED_RISCV_LOW12I 7 /* yes, 7 too */
#define IMAGE_REL_BASED_RISCV_LOW12S 8
+#define IMAGE_REL_BASED_LOONGARCH32_MARK_LA 8 /* yes, 8 too */
+#define IMAGE_REL_BASED_LOONGARCH64_MARK_LA 8 /* yes, 8 too */
#define IMAGE_REL_BASED_MIPS_JMPADDR16 9
#define IMAGE_REL_BASED_IA64_IMM64 9 /* yes, 9 too */
#define IMAGE_REL_BASED_DIR64 10
diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c
index 44b806aadc4f..bc48e265b901 100644
--- a/lib/efi_loader/efi_helper.c
+++ b/lib/efi_loader/efi_helper.c
@@ -62,6 +62,8 @@
#define BOOTEFI_NAME "BOOTRISCV32.EFI"
#elif defined(CONFIG_ARCH_RV64I)
#define BOOTEFI_NAME "BOOTRISCV64.EFI"
+#elif defined(CONFIG_ARCH_LA64)
+#define BOOTEFI_NAME "BOOTLOONGARCH64.EFI"
#else
#error Unsupported UEFI architecture
#endif
@@ -94,6 +96,8 @@ int efi_get_pxe_arch(void)
return 0x19;
else if (IS_ENABLED(CONFIG_ARCH_RV64I))
return 0x1b;
+ else if (IS_ENABLED(CONFIG_ARCH_LA64))
+ return 0x27;
return -EINVAL;
}
diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c
index f9a2d2df405d..bed5f1817266 100644
--- a/lib/efi_loader/efi_image_loader.c
+++ b/lib/efi_loader/efi_image_loader.c
@@ -51,6 +51,13 @@ static int machines[] = {
#if defined(__riscv) && (__riscv_xlen == 64)
IMAGE_FILE_MACHINE_RISCV64,
#endif
+
+#if defined(__loongarch__) && __loongarch_grlen == 64
+ IMAGE_FILE_MACHINE_LOONGARCH64,
+#endif
+#if defined(__loongarch__) && __loongarch_grlen == 32
+ IMAGE_FILE_MACHINE_LOONGARCH32,
+#endif
0 };
/**
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 73d4097464c0..de50d72d634a 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -78,6 +78,10 @@ struct dyn_sym {
#else
#error unknown riscv target
#endif
+#elif defined(__loongarch__)
+#define R_RELATIVE R_LARCH_RELATIVE
+#define R_MASK 0xffffffffULL
+#define IS_RELA 1
#else
#error Need to add relocation awareness
#endif
diff --git a/lib/efi_selftest/efi_selftest_miniapp_exception.c b/lib/efi_selftest/efi_selftest_miniapp_exception.c
index f668cdac4ab2..648206c17098 100644
--- a/lib/efi_selftest/efi_selftest_miniapp_exception.c
+++ b/lib/efi_selftest/efi_selftest_miniapp_exception.c
@@ -35,6 +35,9 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle,
asm volatile (".word 0xffffffff\n");
#elif defined(CONFIG_X86)
asm volatile (".word 0xffff\n");
+#elif defined(CONFIG_LOONGARCH)
+ /* ud 31 */
+ asm volatile (".word 0x386007ff\n");
#elif defined(CONFIG_SANDBOX)
#if (HOST_ARCH == HOST_ARCH_ARM || HOST_ARCH == HOST_ARCH_AARCH64)
asm volatile (".word 0xe7f7defb\n");
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 16/19] efi: LoongArch: Implement everything
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (14 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 15/19] efi: LoongArch: Define LoongArch bits everywhere Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 17/19] doc: arch: Add documentation for LoongArch Yao Zi
` (2 subsequent siblings)
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Implement crt, relocator, linker scripts, and handling of PE relocation
IMAGE_REL_BASED_LOONGARCH64_MARK_LA. Wire things up in Makefiles and
Kconfig. The relocator originates gnu-efi project.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Yao Zi <me@ziyao.cc>
---
Changed from v2
- Mention IMAGE_REL_BASED_LOONGARCH64_MARK_LA handling in the commit
message, explain the instruction sequence in comments
- Mention the origin of reloc_loongarch_efi.c
- Fix typo in copyright of crt0_loongarch_efi.S
- Clean up whitespaces in crt0_loongarch_efi.S
- Fix SPDX identifier for reloc_loongarch_efi.c
- Drop the meaningless branch for DT_PLTGOT in reloc_loongarch_efi.c
Changed from v1
- Replace obsolete macro __loongarch64 with __loongarch__ and
__loongarch_grlen
- Support relocation of IMAGE_REL_BASED_LOONGARCH64_MARK_LA
arch/loongarch/config.mk | 4 +
arch/loongarch/lib/Makefile | 12 ++
arch/loongarch/lib/crt0_loongarch_efi.S | 182 +++++++++++++++++++++++
arch/loongarch/lib/elf_loongarch_efi.lds | 76 ++++++++++
arch/loongarch/lib/reloc_loongarch_efi.c | 102 +++++++++++++
lib/efi_loader/Kconfig | 2 +-
lib/efi_loader/efi_helper.c | 3 +
lib/efi_loader/efi_image_loader.c | 31 ++++
8 files changed, 411 insertions(+), 1 deletion(-)
create mode 100644 arch/loongarch/lib/crt0_loongarch_efi.S
create mode 100644 arch/loongarch/lib/elf_loongarch_efi.lds
create mode 100644 arch/loongarch/lib/reloc_loongarch_efi.c
diff --git a/arch/loongarch/config.mk b/arch/loongarch/config.mk
index 7c247400e361..bae4566e9b62 100644
--- a/arch/loongarch/config.mk
+++ b/arch/loongarch/config.mk
@@ -21,3 +21,7 @@ endif
PLATFORM_CPPFLAGS += -fpic
PLATFORM_RELFLAGS += -fno-common -ffunction-sections -fdata-sections
LDFLAGS_u-boot += --gc-sections -static -pie
+
+EFI_LDS := elf_loongarch_efi.lds
+EFI_CRT0 := crt0_loongarch_efi.o
+EFI_RELOC := reloc_loongarch_efi.o
diff --git a/arch/loongarch/lib/Makefile b/arch/loongarch/lib/Makefile
index 316503985420..faf17067818d 100644
--- a/arch/loongarch/lib/Makefile
+++ b/arch/loongarch/lib/Makefile
@@ -12,3 +12,15 @@ ifeq ($(CONFIG_$(SPL_)SYSRESET),)
obj-y += reset.o
endif
obj-y += setjmp.o
+
+# For building EFI apps
+CFLAGS_NON_EFI := -fstack-protector-strong
+CFLAGS_$(EFI_CRT0) := $(CFLAGS_EFI)
+CFLAGS_REMOVE_$(EFI_CRT0) := $(CFLAGS_NON_EFI)
+
+CFLAGS_$(EFI_RELOC) := $(CFLAGS_EFI)
+CFLAGS_REMOVE_$(EFI_RELOC) := $(CFLAGS_NON_EFI)
+
+extra-$(CONFIG_CMD_BOOTEFI_HELLO_COMPILE) += $(EFI_CRT0) $(EFI_RELOC)
+extra-$(CONFIG_CMD_BOOTEFI_SELFTEST) += $(EFI_CRT0) $(EFI_RELOC)
+extra-$(CONFIG_EFI) += $(EFI_CRT0) $(EFI_RELOC)
diff --git a/arch/loongarch/lib/crt0_loongarch_efi.S b/arch/loongarch/lib/crt0_loongarch_efi.S
new file mode 100644
index 000000000000..605ac58bc865
--- /dev/null
+++ b/arch/loongarch/lib/crt0_loongarch_efi.S
@@ -0,0 +1,182 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * crt0-efi-loongarch.S - PE/COFF header for LoongArch EFI applications
+ *
+ * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
+ */
+
+#include <asm-generic/pe.h>
+#include <asm/asm.h>
+
+#if __loongarch_grlen == 64
+#define PE_MACHINE IMAGE_FILE_MACHINE_LOONGARCH64
+#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR64_MAGIC
+#define IMG_CHARACTERISTICS \
+ (IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED | \
+ IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
+ IMAGE_FILE_LARGE_ADDRESS_AWARE | \
+ IMAGE_FILE_DEBUG_STRIPPED)
+#else
+#define PE_MACHINE IMAGE_FILE_MACHINE_LOONGARCH32
+#define PE_MAGIC IMAGE_NT_OPTIONAL_HDR32_MAGIC
+#define IMG_CHARACTERISTICS \
+ (IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED | \
+ IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
+ IMAGE_FILE_DEBUG_STRIPPED)
+#endif
+
+ .section .text.head
+
+ /*
+ * Magic "MZ" signature for PE/COFF
+ */
+ .globl ImageBase
+ImageBase:
+ .short IMAGE_DOS_SIGNATURE /* 'MZ' */
+ .skip 58
+ .long pe_header - ImageBase /* Offset to the PE header */
+pe_header:
+ .long IMAGE_NT_SIGNATURE /* 'PE' */
+coff_header:
+ .short PE_MACHINE /* LoongArch 64/32-bit */
+ .short 3 /* nr_sections */
+ .long 0 /* TimeDateStamp */
+ .long 0 /* PointerToSymbolTable */
+ .long 0 /* NumberOfSymbols */
+ .short section_table - optional_header /* SizeOfOptionalHeader */
+ .short IMG_CHARACTERISTICS /* Characteristics */
+optional_header:
+ .short PE_MAGIC /* PE32(+) format */
+ .byte 0x02 /* MajorLinkerVersion */
+ .byte 0x14 /* MinorLinkerVersion */
+ .long _edata - _start /* SizeOfCode */
+ .long 0 /* SizeOfInitializedData */
+ .long 0 /* SizeOfUninitializedData */
+ .long _start - ImageBase /* AddressOfEntryPoint */
+ .long _start - ImageBase /* BaseOfCode */
+#if __loongarch_grlen != 64
+ .long 0 /* BaseOfData */
+#endif
+
+extra_header_fields:
+ LONG 0
+ .long 0x200 /* SectionAlignment */
+ .long 0x200 /* FileAlignment */
+ .short 0 /* MajorOperatingSystemVersion */
+ .short 0 /* MinorOperatingSystemVersion */
+ .short 1 /* MajorImageVersion */
+ .short 0 /* MinorImageVersion */
+ .short 0 /* MajorSubsystemVersion */
+ .short 0 /* MinorSubsystemVersion */
+ .long 0 /* Win32VersionValue */
+
+ .long _edata - ImageBase /* SizeOfImage */
+
+ /*
+ * Everything before the kernel image is considered part of the header
+ */
+ .long _start - ImageBase /* SizeOfHeaders */
+ .long 0 /* CheckSum */
+ .short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
+#if CONFIG_VENDOR_EFI
+ .short 0 /* DllCharacteristics */
+#else
+ .short IMAGE_DLLCHARACTERISTICS_NX_COMPAT
+#endif
+ LONG 0 /* SizeOfStackReserve */
+ LONG 0 /* SizeOfStackCommit */
+ LONG 0 /* SizeOfHeapReserve */
+ LONG 0 /* SizeOfHeapCommit */
+
+ .long 0 /* LoaderFlags */
+ .long 0x6 /* NumberOfRvaAndSizes */
+
+ .quad 0 /* ExportTable */
+ .quad 0 /* ImportTable */
+ .quad 0 /* ResourceTable */
+ .quad 0 /* ExceptionTable */
+ .quad 0 /* CertificationTable */
+ .quad 0 /* BaseRelocationTable */
+
+ /* Section table */
+section_table:
+
+ /*
+ * The EFI application loader requires a relocation section
+ * because EFI applications must be relocatable. This is a
+ * dummy section as far as we are concerned.
+ */
+ .ascii ".reloc"
+ .byte 0
+ .byte 0 /* end of 0 padding of section name */
+ .long 0
+ .long 0
+ .long 0 /* SizeOfRawData */
+ .long 0 /* PointerToRawData */
+ .long 0 /* PointerToRelocations */
+ .long 0 /* PointerToLineNumbers */
+ .short 0 /* NumberOfRelocations */
+ .short 0 /* NumberOfLineNumbers */
+ .long 0x42100040 /* Characteristics (section flags) */
+
+
+ .ascii ".text"
+ .byte 0
+ .byte 0
+ .byte 0 /* end of 0 padding of section name */
+ .long _etext - _start /* VirtualSize */
+ .long _start - ImageBase /* VirtualAddress */
+ .long _etext - _start /* SizeOfRawData */
+ .long _start - ImageBase /* PointerToRawData */
+ .long 0 /* PointerToRelocations (0 for executables) */
+ .long 0 /* PointerToLineNumbers (0 for executables) */
+ .short 0 /* NumberOfRelocations (0 for executables) */
+ .short 0 /* NumberOfLineNumbers (0 for executables) */
+ /* Characteristics (section flags) */
+ .long (IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_EXECUTE | \
+ IMAGE_SCN_CNT_CODE)
+
+ .ascii ".data"
+ .byte 0
+ .byte 0
+ .byte 0 /* end of 0 padding of section name */
+ .long _edata - _data /* VirtualSize */
+ .long _data - ImageBase /* VirtualAddress */
+ .long _edata - _data /* SizeOfRawData */
+ .long _data - ImageBase /* PointerToRawData */
+ .long 0 /* PointerToRelocations */
+ .long 0 /* PointerToLineNumbers */
+ .short 0 /* NumberOfRelocations */
+ .short 0 /* NumberOfLineNumbers */
+ /* Characteristics (section flags) */
+ .long (IMAGE_SCN_MEM_WRITE | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_CNT_INITIALIZED_DATA)
+
+ .align 12
+ .globl _start
+ .type _start, @function
+_start:
+ PTR_ADDI sp, sp, -(3 * LONGSIZE)
+ LONG_S ra, sp, 0
+ LONG_S a0, sp, (1 * LONGSIZE)
+ LONG_S a1, sp, (2 * LONGSIZE)
+
+ move a2, a0 /* a2: ImageHandle */
+ move a3, a1 /* a3: SystemTable */
+ la.local a0, ImageBase /* a0: ImageBase */
+ la.local a1, _DYNAMIC /* a1: DynamicSection */
+ bl _relocate
+ bnez a0, 0f
+
+ LONG_L a0, sp, (1 * LONGSIZE)
+ LONG_L a1, sp, (2 * LONGSIZE)
+ bl efi_main
+
+0: LONG_L ra, sp, 0
+ PTR_ADDI sp, sp, (3 * LONGSIZE)
+ jr ra
+ .end _start
diff --git a/arch/loongarch/lib/elf_loongarch_efi.lds b/arch/loongarch/lib/elf_loongarch_efi.lds
new file mode 100644
index 000000000000..050e5a52a0b3
--- /dev/null
+++ b/arch/loongarch/lib/elf_loongarch_efi.lds
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * U-Boot LoongArch
+ *
+ * Modified from arch/riscv/lib/elf_riscv64_efi.lds
+ */
+
+OUTPUT_ARCH(loongarch)
+
+PHDRS
+{
+ data PT_LOAD FLAGS(3); /* SHF_WRITE | SHF_ALLOC */
+}
+
+ENTRY(_start)
+SECTIONS
+{
+ .text 0x0 : {
+ _text = .;
+ *(.text.head)
+ *(.text)
+ *(.text.*)
+ *(.gnu.linkonce.t.*)
+ *(.srodata)
+ *(.rodata*)
+ . = ALIGN(16);
+ *(.dynamic);
+ . = ALIGN(512);
+ }
+ .rela.dyn : { *(.rela.dyn) }
+ .rela.plt : { *(.rela.plt) }
+ .rela.got : { *(.rela.got) }
+ .rela.data : { *(.rela.data) *(.rela.data*) }
+ _etext = .;
+ _text_size = . - _text;
+ . = ALIGN(4096);
+ .data : {
+ _data = .;
+ *(.sdata)
+ *(.data)
+ *(.data1)
+ *(.data.*)
+ *(.got.plt)
+ *(.got)
+
+ /*
+ * The EFI loader doesn't seem to like a .bss section, so we
+ * stick it all into .data:
+ */
+ . = ALIGN(16);
+ _bss = .;
+ *(.sbss)
+ *(.scommon)
+ *(.dynbss)
+ *(.bss)
+ *(.bss.*)
+ *(COMMON)
+ . = ALIGN(512);
+ _bss_end = .;
+ _edata = .;
+ } :data
+ _data_size = _edata - _data;
+
+ . = ALIGN(4096);
+ .dynsym : { *(.dynsym) }
+ . = ALIGN(4096);
+ .dynstr : { *(.dynstr) }
+ . = ALIGN(4096);
+ .note.gnu.build-id : { *(.note.gnu.build-id) }
+ /DISCARD/ : {
+ *(.rel.reloc)
+ *(.eh_frame)
+ *(.note.GNU-stack)
+ }
+ .comment 0 : { *(.comment) }
+}
diff --git a/arch/loongarch/lib/reloc_loongarch_efi.c b/arch/loongarch/lib/reloc_loongarch_efi.c
new file mode 100644
index 000000000000..9559c14261d2
--- /dev/null
+++ b/arch/loongarch/lib/reloc_loongarch_efi.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/* reloc_loongarch.c - position independent ELF shared object relocator
+ Copyright (C) 2018 Alexander Graf <agraf@suse.de>
+ Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
+ Copyright (C) 1999 Hewlett-Packard Co.
+ Contributed by David Mosberger <davidm@hpl.hp.com>.
+
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials
+ provided with the distribution.
+ * Neither the name of Hewlett-Packard Co. nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ SUCH DAMAGE.
+*/
+
+#include <efi.h>
+
+#include <elf.h>
+
+#if __loongarch_grlen == 64
+#define Elf_Dyn Elf64_Dyn
+#define Elf_Rela Elf64_Rela
+#define ELF_R_TYPE ELF64_R_TYPE
+#else
+#define Elf_Dyn Elf32_Dyn
+#define Elf_Rela Elf32_Rela
+#define ELF_R_TYPE ELF32_R_TYPE
+#endif
+
+efi_status_t EFIAPI _relocate(long ldbase, Elf_Dyn *dyn)
+{
+ long relsz = 0, relent = 0;
+ Elf_Rela *rel = 0;
+ unsigned long *addr;
+ int i;
+
+ for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
+ switch (dyn[i].d_tag) {
+ case DT_RELA:
+ rel = (Elf_Rela *)
+ ((unsigned long)dyn[i].d_un.d_ptr
+ + ldbase);
+ break;
+ case DT_RELASZ:
+ relsz = dyn[i].d_un.d_val;
+ break;
+ case DT_RELAENT:
+ relent = dyn[i].d_un.d_val;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (!rel && relent == 0)
+ return EFI_SUCCESS;
+
+ if (!rel || relent == 0)
+ return EFI_LOAD_ERROR;
+
+ while (relsz > 0) {
+ /* apply the relocs */
+ switch (ELF_R_TYPE(rel->r_info)) {
+ case R_LARCH_NONE:
+ break;
+ case R_LARCH_RELATIVE:
+ addr = (unsigned long *)
+ (ldbase + rel->r_offset);
+ *addr += ldbase;
+ break;
+ default:
+ break;
+ }
+ rel = (Elf_Rela *)((char *)rel + relent);
+ relsz -= relent;
+ }
+ return EFI_SUCCESS;
+}
+
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 4cb13ae7c8a8..89988f199f7b 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -7,7 +7,7 @@ config EFI_LOADER
SYS_CPU = arm1176 || \
SYS_CPU = armv7 || \
SYS_CPU = armv8) || \
- X86 || RISCV || SANDBOX)
+ X86 || RISCV || LOONGARCH || SANDBOX)
# We have not fully removed the requirement for some block device
depends on BLK
# We need EFI_STUB_64BIT to be set on x86_64 with EFI_STUB
diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c
index bc48e265b901..641b001a9a16 100644
--- a/lib/efi_loader/efi_helper.c
+++ b/lib/efi_loader/efi_helper.c
@@ -44,6 +44,9 @@
#elif HOST_ARCH == HOST_ARCH_RISCV64
#define HOST_BOOTEFI_NAME "BOOTRISCV64.EFI"
#define HOST_PXE_ARCH 0x1b
+#elif HOST_ARCH == HOST_ARCH_LOONGARCH64
+#define HOST_BOOTEFI_NAME "BOOTLOONGARCH64.EFI"
+#define HOST_PXE_ARCH 0x27
#else
#error Unsupported Host architecture
#endif
diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c
index bed5f1817266..cf1352cf6d72 100644
--- a/lib/efi_loader/efi_image_loader.c
+++ b/lib/efi_loader/efi_image_loader.c
@@ -19,6 +19,7 @@
#include <crypto/mscode.h>
#include <crypto/pkcs7_parser.h>
#include <linux/err.h>
+#include <linux/bitfield.h>
const efi_guid_t efi_global_variable_guid = EFI_GLOBAL_VARIABLE_GUID;
const efi_guid_t efi_guid_device_path = EFI_DEVICE_PATH_PROTOCOL_GUID;
@@ -165,6 +166,7 @@ static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
uint32_t entry_offset = *relocs & 0xfff;
unsigned long offset;
int type = *relocs >> EFI_PAGE_SHIFT;
+ __maybe_unused uint64_t tmp;
uint64_t *x64;
uint32_t *x32;
uint16_t *x16;
@@ -230,6 +232,35 @@ static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
log_err("Unsupported reloc offset\n");
return EFI_LOAD_ERROR;
}
+ break;
+#elif defined(__loongarch__) && __loongarch_grlen == 64
+ case IMAGE_REL_BASED_LOONGARCH64_MARK_LA:
+ if (virt_size - offset < 16) {
+ log_debug("relocation address out of bounds\n");
+ return EFI_LOAD_ERROR;
+ }
+
+ /*
+ * Apply an offset to a 64-bit immedate loaded
+ * by four instructions, lu12i.w, ori, lu32i.d,
+ * and lu52i.d.
+ */
+ tmp = FIELD_GET(GENMASK(24, 5), x32[0]) << 12;
+ tmp |= FIELD_GET(GENMASK(21, 10), x32[1]);
+ tmp |= FIELD_GET(GENMASK(24, 5), x32[2]) << 32;
+ tmp |= FIELD_GET(GENMASK(21, 10), x32[3]) << 52;
+ tmp += (uint64_t)delta;
+
+ x32[0] &= ~GENMASK(24, 5);
+ x32[0] |= FIELD_PREP(GENMASK(24, 5), tmp >> 12);
+ x32[1] &= ~GENMASK(21, 10);
+ x32[1] |= FIELD_PREP(GENMASK(21, 10), tmp);
+ x32[2] &= ~GENMASK(24, 5);
+ x32[2] |= FIELD_PREP(GENMASK(24, 5), tmp >> 32);
+ x32[3] &= ~GENMASK(21, 10);
+ x32[3] |= FIELD_PREP(GENMASK(21, 10),
+ tmp >> 52);
+
break;
#endif
default:
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 17/19] doc: arch: Add documentation for LoongArch
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (15 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 16/19] efi: LoongArch: Implement everything Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 18/19] MAINTAINERS: Add entry " Yao Zi
2026-08-21 8:42 ` [PATCH v3 19/19] CI: Wire up qemu-loongarch64 Yao Zi
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
Add a brief introduction to LoongArch architecture, some notes on the
implementation, and the toolchain supporting status.
Signed-off-by: Yao Zi <me@ziyao.cc>
---
New patch since v3
doc/arch/index.rst | 1 +
doc/arch/loongarch.rst | 30 ++++++++++++++++++++++++++++++
2 files changed, 31 insertions(+)
create mode 100644 doc/arch/loongarch.rst
diff --git a/doc/arch/index.rst b/doc/arch/index.rst
index 60c93b3b6640..10903b806d2c 100644
--- a/doc/arch/index.rst
+++ b/doc/arch/index.rst
@@ -9,6 +9,7 @@ Architecture-specific doc
arc
arm64
arm64.ffa
+ loongarch
m68k
mips
nios2
diff --git a/doc/arch/loongarch.rst b/doc/arch/loongarch.rst
new file mode 100644
index 000000000000..d744db6a4999
--- /dev/null
+++ b/doc/arch/loongarch.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+.. Copyright (C) 2026 Yao Zi <me@ziyao.cc>
+
+LoongArch
+=========
+
+LoongArch is a RISC ISA developed by Loongson Technology. It currently defines
+three variants: a reduced 32-bit version (LA32R), a standard 32-bit version
+(LA32S) for embedded devices, and a 64-bit version (LA64).
+
+Notes
+-----
+
+1. Currently U-Boot only runs on LA64 variant with the highest privilege level
+ (PLV0).
+
+2. LA64 is distinguished with 32-bit LoongArch with CONFIG_ARCH_LA64.
+
+3. U-Boot expects hardware-maintained coherency between I-D cache. Cache
+ topology is probed through CPUCFG; L2 and L3 caches, if present, must be
+ unified or instruction-only. This is true for all commercial LA64 hardware.
+ Refer to arch/loongarch/lib/cache.c for further description.
+
+Toolchain
+---------
+
+LoongArch is supported in upstream binutils, gcc, and LLVM. GCC 12.1 started to
+support LA64, and GCC 16 started to support LA32.
+`kernel.org <https://mirrors.edge.kernel.org/pub/tools/crosstool/>`_ provides
+pre-built toolchain for both 32-bit and 64-bit LoongArch.
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 18/19] MAINTAINERS: Add entry for LoongArch
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (16 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 17/19] doc: arch: Add documentation for LoongArch Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 19/19] CI: Wire up qemu-loongarch64 Yao Zi
18 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
Add an entry for LoongArch-specific code and documentation. Jiaxun and I
will maintain the LoongArch port.
Signed-off-by: Yao Zi <me@ziyao.cc>
---
New patch since v3.
MAINTAINERS | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index a9b438d0074e..d4ed4b2d115e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1233,6 +1233,17 @@ F: lib/getopt.c
F: test/log/
F: test/py/tests/test_log.py
+LOONGARCH
+M: Jiaxun Yang <jiaxun.yang@flygoat.com>
+M: Yao Zi <me@ziyao.cc>
+S: Maintained
+T: git https://git.u-boot-project.org/u-boot/custodians/u-boot-loongarch.git
+F: arch/loongarch
+F: doc/arch/loongarch.rst
+F: drivers/cpu/loongarch_cpu.c
+F: drivers/timer/loongarch_timer.c
+N: loongarch
+
M680X0 ARCHITECTURE
M: Kuan-Wei Chiu <visitorckw@gmail.com>
S: Maintained
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v3 19/19] CI: Wire up qemu-loongarch64
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
` (17 preceding siblings ...)
2026-08-21 8:42 ` [PATCH v3 18/19] MAINTAINERS: Add entry " Yao Zi
@ 2026-08-21 8:42 ` Yao Zi
2026-08-21 16:21 ` Tom Rini
18 siblings, 1 reply; 30+ messages in thread
From: Yao Zi @ 2026-08-21 8:42 UTC (permalink / raw)
To: Tom Rini, Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas
Cc: u-boot, Yao Zi
Enable qemu-loongarch64 in CI so it could be automatically tested.
Signed-off-by: Yao Zi <me@ziyao.cc>
---
New patch since v3
.azure-pipelines.yml | 11 +++++++----
.gitlab-ci.yml | 6 ++++++
2 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index 015fc15d5c29..0c350ae9d46c 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -19,7 +19,7 @@ variables:
k3_64b: "k3 -x armv7,phytec,toradex"
kirkwood_mvebu: "kirkwood mvebu"
layerscape_vf610: "ls1 ls2 lx2 vf610 -x phytec,toradex"
- m68k_remaining_mx_xtensa: "m68k imxrt mx xtensa -x mx6,aarch64"
+ loongarch_m68k_remaining_mx_xtensa: "loongarch m68k imxrt mx xtensa -x mx6,aarch64"
mips_x86: "mips x86 -x mediatek"
mx6: "mx6 -x engicam,phytec,toradex"
imx8: "imx8 -x engicam,phytec,toradex"
@@ -212,7 +212,7 @@ stages:
built="$built $(tools/buildman/buildman ${BMANARGS} $(k3_64b) | grep '^ ')"
built="$built $(tools/buildman/buildman ${BMANARGS} $(kirkwood_mvebu) | grep '^ ')"
built="$built $(tools/buildman/buildman ${BMANARGS} $(layerscape_vf610) | grep '^ ')"
- built="$built $(tools/buildman/buildman ${BMANARGS} $(m68k_remaining_mx_xtensa) | grep '^ ')"
+ built="$built $(tools/buildman/buildman ${BMANARGS} $(loongarch_m68k_remaining_mx_xtensa) | grep '^ ')"
built="$built $(tools/buildman/buildman ${BMANARGS} $(mips_x86) | grep '^ ')"
built="$built $(tools/buildman/buildman ${BMANARGS} $(mx6) | grep '^ ')"
built="$built $(tools/buildman/buildman ${BMANARGS} $(imx8) | grep '^ ')"
@@ -490,6 +490,9 @@ stages:
qemu_arm_sbsa_ref:
TEST_PY_BD: "qemu-arm-sbsa"
TEST_PY_TEST_SPEC: "not sleep"
+ qemu_loongarch64:
+ TEST_PY_BD: "qemu-loongarch64"
+ TEST_PY_TEST_SPEC: "not sleep"
qemu_m68k:
TEST_PY_BD: "M5208EVBE"
TEST_PY_ID: "--id qemu"
@@ -657,8 +660,8 @@ stages:
BUILDMAN: $(kirkwood_mvebu)
layerscape_vf610:
BUILDMAN: $(layerscape_vf610)
- m68k_remaining_mx_xtensa:
- BUILDMAN: $(m68k_remaining_mx_xtensa)
+ loongarch_m68k_remaining_mx_xtensa:
+ BUILDMAN: $(loongarch_m68k_remaining_mx_xtensa)
mips_x86:
BUILDMAN: $(mips_x86)
mx6:
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9831dd61bc18..e7957c581560 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -415,6 +415,12 @@ qemu_arm_sbsa test.py:
TEST_PY_TEST_SPEC: "not sleep"
<<: *buildman_and_testpy_dfn
+qemu_loongarch64 test.py:
+ variables:
+ TEST_PY_BD: "qemu-loongarch64"
+ TEST_PY_TEST_SPEC: "not sleep"
+ <<: *buildman_and_testpy_dfn
+
qemu_m68k test.py:
variables:
TEST_PY_BD: "M5208EVBE"
--
2.55.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* Re: [PATCH v3 03/19] image: Take entry point as an output of setup_booti
2026-08-21 8:42 ` [PATCH v3 03/19] image: Take entry point as an output of setup_booti Yao Zi
@ 2026-08-21 16:20 ` Tom Rini
0 siblings, 0 replies; 30+ messages in thread
From: Tom Rini @ 2026-08-21 16:20 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 622 bytes --]
On Fri, Aug 21, 2026 at 08:42:03AM +0000, Yao Zi wrote:
> From: Jiaxun Yang <jiaxun.yang@flygoat.com>
>
> For LoongArch, the start of the image is not the entry point. Refactor
> the code base to allow entry point to be supplied by booti_setup().
> Also update the kerneldoc comment for booti_setup() to reflect the
> latest argument lists.
>
> Link: https://www.kernel.org/doc/html/v7.2/arch/loongarch/booting.html#header-of-linux-loongarch-kernel-images
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> Signed-off-by: Yao Zi <me@ziyao.cc>
Reviewed-by: Tom Rini <trini@konsulko.com>
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 10/19] LoongArch: Boot Image bits
2026-08-21 8:42 ` [PATCH v3 10/19] LoongArch: Boot Image bits Yao Zi
@ 2026-08-21 16:20 ` Tom Rini
2026-08-22 17:52 ` Yao Zi
0 siblings, 1 reply; 30+ messages in thread
From: Tom Rini @ 2026-08-21 16:20 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 1228 bytes --]
On Fri, Aug 21, 2026 at 08:42:10AM +0000, Yao Zi wrote:
> From: Jiaxun Yang <jiaxun.yang@flygoat.com>
>
> Implement loading and booting functions for LoongArch
> standard kernel image as per spec.
>
> LoongArch kernel do expect us to fake a efi systemtable
> for passing fdt to kernel, we don't need to implement any
> EFI functions for kernel because it won't look into anything
> beside devicetree from that table if we tell kernel we are
> not efi compatible by setting a0 boot argument to zero.
>
> Link: https://docs.kernel.org/arch/loongarch/booting.html
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> Signed-off-by: Yao Zi <me@ziyao.cc>
[snip]
> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> index ac4be2c837c0..5654de5a58c7 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -56,4 +56,7 @@ config STACK_SIZE_SHIFT
> config OF_BOARD_FIXUP
> default y if OF_SEPARATE
>
> +config LIB_BOOTM
> + select CRC32
If this is needed, it's a generic problem (and to be fixed outside this
series) where LIB_BOOTM (and possibly LIB_BOOTI/Z since you know what to
look for) need to select CRC32 and SPL_LIB_BOOTM SPL_CRC32. Thanks.
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 14/19] board: emulation: Add qemu-loongarch
2026-08-21 8:42 ` [PATCH v3 14/19] board: emulation: Add qemu-loongarch Yao Zi
@ 2026-08-21 16:20 ` Tom Rini
2026-08-22 20:40 ` Yao Zi
0 siblings, 1 reply; 30+ messages in thread
From: Tom Rini @ 2026-08-21 16:20 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 1021 bytes --]
On Fri, Aug 21, 2026 at 08:42:14AM +0000, Yao Zi wrote:
> From: Jiaxun Yang <jiaxun.yang@flygoat.com>
>
> Yet another generic QEMU VIRT machine.
>
> LoongArch QEMU splits the main RAM into two parts: the first 512M is
> placed at 0x0, and the rest is placed at 0x8000000. FDT locates at
> 0x100000. BIOS is mapped to the first flash mapped to 0x1c000000, where
> U-Boot starts execution.
>
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> Signed-off-by: Yao Zi <me@ziyao.cc>
[snip]
> diff --git a/arch/loongarch/dts/qemu-loongarch64.dts b/arch/loongarch/dts/qemu-loongarch64.dts
> new file mode 100644
> index 000000000000..39d303798fcb
> --- /dev/null
> +++ b/arch/loongarch/dts/qemu-loongarch64.dts
> @@ -0,0 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
> + */
> +
> +/dts-v1/;
> +
> +/ {
> +};
I thought I had pushed everything so that we do not need to have fake
empty dts files anymore.
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 19/19] CI: Wire up qemu-loongarch64
2026-08-21 8:42 ` [PATCH v3 19/19] CI: Wire up qemu-loongarch64 Yao Zi
@ 2026-08-21 16:21 ` Tom Rini
0 siblings, 0 replies; 30+ messages in thread
From: Tom Rini @ 2026-08-21 16:21 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 230 bytes --]
On Fri, Aug 21, 2026 at 08:42:19AM +0000, Yao Zi wrote:
> Enable qemu-loongarch64 in CI so it could be automatically tested.
>
> Signed-off-by: Yao Zi <me@ziyao.cc>
Reviewed-by: Tom Rini <trini@konsulko.com>
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 10/19] LoongArch: Boot Image bits
2026-08-21 16:20 ` Tom Rini
@ 2026-08-22 17:52 ` Yao Zi
2026-08-22 19:03 ` Tom Rini
0 siblings, 1 reply; 30+ messages in thread
From: Yao Zi @ 2026-08-22 17:52 UTC (permalink / raw)
To: Tom Rini, Yao Zi
Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
On Fri, Aug 21, 2026 at 10:20:48AM -0600, Tom Rini wrote:
> On Fri, Aug 21, 2026 at 08:42:10AM +0000, Yao Zi wrote:
>
> > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> >
> > Implement loading and booting functions for LoongArch
> > standard kernel image as per spec.
> >
> > LoongArch kernel do expect us to fake a efi systemtable
I occasionally noticed this typo ('a' -> 'an'), will fix it.
> > for passing fdt to kernel, we don't need to implement any
> > EFI functions for kernel because it won't look into anything
> > beside devicetree from that table if we tell kernel we are
> > not efi compatible by setting a0 boot argument to zero.
> >
> > Link: https://docs.kernel.org/arch/loongarch/booting.html
> > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > Signed-off-by: Yao Zi <me@ziyao.cc>
> [snip]
> > diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> > index ac4be2c837c0..5654de5a58c7 100644
> > --- a/arch/loongarch/Kconfig
> > +++ b/arch/loongarch/Kconfig
> > @@ -56,4 +56,7 @@ config STACK_SIZE_SHIFT
> > config OF_BOARD_FIXUP
> > default y if OF_SEPARATE
> >
> > +config LIB_BOOTM
> > + select CRC32
>
> If this is needed, it's a generic problem (and to be fixed outside this
> series) where LIB_BOOTM (and possibly LIB_BOOTI/Z since you know what to
> look for) need to select CRC32 and SPL_LIB_BOOTM SPL_CRC32. Thanks.
I think the dependency is specific to LoongArch, since CRC32 is
necessary only because we need to fake an EFI system table, which is
CRC32-checksum'ed, to pass FDT to the kernel on LoongArch. AFAIK other
architectures don't require such treatment, so I keep this
LoongArch-only.
Should I include a comment here to explain the dependency?
> --
> Tom
Regards,
Yao Zi
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 10/19] LoongArch: Boot Image bits
2026-08-22 17:52 ` Yao Zi
@ 2026-08-22 19:03 ` Tom Rini
2026-08-22 19:06 ` Tom Rini
0 siblings, 1 reply; 30+ messages in thread
From: Tom Rini @ 2026-08-22 19:03 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 1918 bytes --]
On Sat, Aug 22, 2026 at 05:52:14PM +0000, Yao Zi wrote:
> On Fri, Aug 21, 2026 at 10:20:48AM -0600, Tom Rini wrote:
> > On Fri, Aug 21, 2026 at 08:42:10AM +0000, Yao Zi wrote:
> >
> > > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > >
> > > Implement loading and booting functions for LoongArch
> > > standard kernel image as per spec.
> > >
> > > LoongArch kernel do expect us to fake a efi systemtable
>
> I occasionally noticed this typo ('a' -> 'an'), will fix it.
>
> > > for passing fdt to kernel, we don't need to implement any
> > > EFI functions for kernel because it won't look into anything
> > > beside devicetree from that table if we tell kernel we are
> > > not efi compatible by setting a0 boot argument to zero.
> > >
> > > Link: https://docs.kernel.org/arch/loongarch/booting.html
> > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > Signed-off-by: Yao Zi <me@ziyao.cc>
> > [snip]
> > > diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> > > index ac4be2c837c0..5654de5a58c7 100644
> > > --- a/arch/loongarch/Kconfig
> > > +++ b/arch/loongarch/Kconfig
> > > @@ -56,4 +56,7 @@ config STACK_SIZE_SHIFT
> > > config OF_BOARD_FIXUP
> > > default y if OF_SEPARATE
> > >
> > > +config LIB_BOOTM
> > > + select CRC32
> >
> > If this is needed, it's a generic problem (and to be fixed outside this
> > series) where LIB_BOOTM (and possibly LIB_BOOTI/Z since you know what to
> > look for) need to select CRC32 and SPL_LIB_BOOTM SPL_CRC32. Thanks.
>
> I think the dependency is specific to LoongArch, since CRC32 is
> necessary only because we need to fake an EFI system table, which is
> CRC32-checksum'ed, to pass FDT to the kernel on LoongArch. AFAIK other
> architectures don't require such treatment, so I keep this
> LoongArch-only.
Ah, I think where you select LIB_BOOTM you should also select CRC32
then.
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 10/19] LoongArch: Boot Image bits
2026-08-22 19:03 ` Tom Rini
@ 2026-08-22 19:06 ` Tom Rini
2026-08-22 20:47 ` Yao Zi
0 siblings, 1 reply; 30+ messages in thread
From: Tom Rini @ 2026-08-22 19:06 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 2159 bytes --]
On Sat, Aug 22, 2026 at 01:03:16PM -0600, Tom Rini wrote:
> On Sat, Aug 22, 2026 at 05:52:14PM +0000, Yao Zi wrote:
> > On Fri, Aug 21, 2026 at 10:20:48AM -0600, Tom Rini wrote:
> > > On Fri, Aug 21, 2026 at 08:42:10AM +0000, Yao Zi wrote:
> > >
> > > > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > >
> > > > Implement loading and booting functions for LoongArch
> > > > standard kernel image as per spec.
> > > >
> > > > LoongArch kernel do expect us to fake a efi systemtable
> >
> > I occasionally noticed this typo ('a' -> 'an'), will fix it.
> >
> > > > for passing fdt to kernel, we don't need to implement any
> > > > EFI functions for kernel because it won't look into anything
> > > > beside devicetree from that table if we tell kernel we are
> > > > not efi compatible by setting a0 boot argument to zero.
> > > >
> > > > Link: https://docs.kernel.org/arch/loongarch/booting.html
> > > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > > Signed-off-by: Yao Zi <me@ziyao.cc>
> > > [snip]
> > > > diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> > > > index ac4be2c837c0..5654de5a58c7 100644
> > > > --- a/arch/loongarch/Kconfig
> > > > +++ b/arch/loongarch/Kconfig
> > > > @@ -56,4 +56,7 @@ config STACK_SIZE_SHIFT
> > > > config OF_BOARD_FIXUP
> > > > default y if OF_SEPARATE
> > > >
> > > > +config LIB_BOOTM
> > > > + select CRC32
> > >
> > > If this is needed, it's a generic problem (and to be fixed outside this
> > > series) where LIB_BOOTM (and possibly LIB_BOOTI/Z since you know what to
> > > look for) need to select CRC32 and SPL_LIB_BOOTM SPL_CRC32. Thanks.
> >
> > I think the dependency is specific to LoongArch, since CRC32 is
> > necessary only because we need to fake an EFI system table, which is
> > CRC32-checksum'ed, to pass FDT to the kernel on LoongArch. AFAIK other
> > architectures don't require such treatment, so I keep this
> > LoongArch-only.
>
> Ah, I think where you select LIB_BOOTM you should also select CRC32
> then.
Or, finishing the thought, "select CRC32 if LOONGARCH" in the main
entry for LIB_BOOTM.
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 14/19] board: emulation: Add qemu-loongarch
2026-08-21 16:20 ` Tom Rini
@ 2026-08-22 20:40 ` Yao Zi
2026-08-22 20:51 ` Tom Rini
0 siblings, 1 reply; 30+ messages in thread
From: Yao Zi @ 2026-08-22 20:40 UTC (permalink / raw)
To: Tom Rini, Yao Zi
Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
On Fri, Aug 21, 2026 at 10:20:55AM -0600, Tom Rini wrote:
> On Fri, Aug 21, 2026 at 08:42:14AM +0000, Yao Zi wrote:
>
> > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> >
> > Yet another generic QEMU VIRT machine.
> >
> > LoongArch QEMU splits the main RAM into two parts: the first 512M is
> > placed at 0x0, and the rest is placed at 0x8000000. FDT locates at
> > 0x100000. BIOS is mapped to the first flash mapped to 0x1c000000, where
> > U-Boot starts execution.
> >
> > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > Signed-off-by: Yao Zi <me@ziyao.cc>
> [snip]
> > diff --git a/arch/loongarch/dts/qemu-loongarch64.dts b/arch/loongarch/dts/qemu-loongarch64.dts
> > new file mode 100644
> > index 000000000000..39d303798fcb
> > --- /dev/null
> > +++ b/arch/loongarch/dts/qemu-loongarch64.dts
> > @@ -0,0 +1,9 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
> > + */
> > +
> > +/dts-v1/;
> > +
> > +/ {
> > +};
>
> I thought I had pushed everything so that we do not need to have fake
> empty dts files anymore.
Do you mean OF_OMIT_DTB? Even with it enabled, a devicetree blob,
specified by CONFIG_dEFAULT_DEVICE_TREE, is always built, but not
integrated in the final u-boot.bin.
qemu_arm_defconfig also ships an empty devicetree. I'm not sure whether
there's really a way to avoid building a dtb...
> --
> Tom
Best regards,
Yao Zi
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 10/19] LoongArch: Boot Image bits
2026-08-22 19:06 ` Tom Rini
@ 2026-08-22 20:47 ` Yao Zi
0 siblings, 0 replies; 30+ messages in thread
From: Yao Zi @ 2026-08-22 20:47 UTC (permalink / raw)
To: Tom Rini, Yao Zi
Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
On Sat, Aug 22, 2026 at 01:06:51PM -0600, Tom Rini wrote:
> On Sat, Aug 22, 2026 at 01:03:16PM -0600, Tom Rini wrote:
> > On Sat, Aug 22, 2026 at 05:52:14PM +0000, Yao Zi wrote:
> > > On Fri, Aug 21, 2026 at 10:20:48AM -0600, Tom Rini wrote:
> > > > On Fri, Aug 21, 2026 at 08:42:10AM +0000, Yao Zi wrote:
> > > >
> > > > > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > > >
> > > > > Implement loading and booting functions for LoongArch
> > > > > standard kernel image as per spec.
> > > > >
> > > > > LoongArch kernel do expect us to fake a efi systemtable
> > >
> > > I occasionally noticed this typo ('a' -> 'an'), will fix it.
> > >
> > > > > for passing fdt to kernel, we don't need to implement any
> > > > > EFI functions for kernel because it won't look into anything
> > > > > beside devicetree from that table if we tell kernel we are
> > > > > not efi compatible by setting a0 boot argument to zero.
> > > > >
> > > > > Link: https://docs.kernel.org/arch/loongarch/booting.html
> > > > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > > > Signed-off-by: Yao Zi <me@ziyao.cc>
> > > > [snip]
> > > > > diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> > > > > index ac4be2c837c0..5654de5a58c7 100644
> > > > > --- a/arch/loongarch/Kconfig
> > > > > +++ b/arch/loongarch/Kconfig
> > > > > @@ -56,4 +56,7 @@ config STACK_SIZE_SHIFT
> > > > > config OF_BOARD_FIXUP
> > > > > default y if OF_SEPARATE
> > > > >
> > > > > +config LIB_BOOTM
> > > > > + select CRC32
> > > >
> > > > If this is needed, it's a generic problem (and to be fixed outside this
> > > > series) where LIB_BOOTM (and possibly LIB_BOOTI/Z since you know what to
> > > > look for) need to select CRC32 and SPL_LIB_BOOTM SPL_CRC32. Thanks.
> > >
> > > I think the dependency is specific to LoongArch, since CRC32 is
> > > necessary only because we need to fake an EFI system table, which is
> > > CRC32-checksum'ed, to pass FDT to the kernel on LoongArch. AFAIK other
> > > architectures don't require such treatment, so I keep this
> > > LoongArch-only.
> >
> > Ah, I think where you select LIB_BOOTM you should also select CRC32
> > then.
>
> Or, finishing the thought, "select CRC32 if LOONGARCH" in the main
> entry for LIB_BOOTM.
Okay. I separate it out since it's LoongArch-specific and doing so
avoids touching generic Kconfigs, but was not sure which is preferred.
Will move the selection to the main LIB_BOOTM entry.
> --
> Tom
Regards,
Yao Zi
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v3 14/19] board: emulation: Add qemu-loongarch
2026-08-22 20:40 ` Yao Zi
@ 2026-08-22 20:51 ` Tom Rini
0 siblings, 0 replies; 30+ messages in thread
From: Tom Rini @ 2026-08-22 20:51 UTC (permalink / raw)
To: Yao Zi; +Cc: Jiaxun Yang, Heinrich Schuchardt, Ilias Apalodimas, u-boot
[-- Attachment #1: Type: text/plain, Size: 1790 bytes --]
On Sat, Aug 22, 2026 at 08:40:34PM +0000, Yao Zi wrote:
> On Fri, Aug 21, 2026 at 10:20:55AM -0600, Tom Rini wrote:
> > On Fri, Aug 21, 2026 at 08:42:14AM +0000, Yao Zi wrote:
> >
> > > From: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > >
> > > Yet another generic QEMU VIRT machine.
> > >
> > > LoongArch QEMU splits the main RAM into two parts: the first 512M is
> > > placed at 0x0, and the rest is placed at 0x8000000. FDT locates at
> > > 0x100000. BIOS is mapped to the first flash mapped to 0x1c000000, where
> > > U-Boot starts execution.
> > >
> > > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > Signed-off-by: Yao Zi <me@ziyao.cc>
> > [snip]
> > > diff --git a/arch/loongarch/dts/qemu-loongarch64.dts b/arch/loongarch/dts/qemu-loongarch64.dts
> > > new file mode 100644
> > > index 000000000000..39d303798fcb
> > > --- /dev/null
> > > +++ b/arch/loongarch/dts/qemu-loongarch64.dts
> > > @@ -0,0 +1,9 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +/*
> > > + * Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com>
> > > + */
> > > +
> > > +/dts-v1/;
> > > +
> > > +/ {
> > > +};
> >
> > I thought I had pushed everything so that we do not need to have fake
> > empty dts files anymore.
>
> Do you mean OF_OMIT_DTB? Even with it enabled, a devicetree blob,
> specified by CONFIG_dEFAULT_DEVICE_TREE, is always built, but not
> integrated in the final u-boot.bin.
>
> qemu_arm_defconfig also ships an empty devicetree. I'm not sure whether
> there's really a way to avoid building a dtb...
There is, but, OK, I didn't post a v2 of the series:
https://lore.kernel.org/u-boot/20260708013019.288985-1-trini@konsulko.com/
So, this comment doesn't apply as it's not something you can avoid doing
yet.
--
Tom
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
^ permalink raw reply [flat|nested] 30+ messages in thread
end of thread, other threads:[~2026-08-22 20:51 UTC | newest]
Thread overview: 30+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-08-21 8:42 [PATCH v3 00/19] LoongArch initial support Yao Zi
2026-08-21 8:42 ` [PATCH v3 01/19] lib: fdtdec: Handle multiple memory nodes Yao Zi
2026-08-21 8:42 ` [PATCH v3 02/19] linux/io.h: Use map_physmem to implement ioremap Yao Zi
2026-08-21 8:42 ` [PATCH v3 03/19] image: Take entry point as an output of setup_booti Yao Zi
2026-08-21 16:20 ` Tom Rini
2026-08-21 8:42 ` [PATCH v3 04/19] elf: Define LoongArch bits Yao Zi
2026-08-21 8:42 ` [PATCH v3 05/19] image: Define IH_ARCH_LOONGARCH Yao Zi
2026-08-21 8:42 ` [PATCH v3 06/19] LoongArch: skeleton and headers Yao Zi
2026-08-21 8:42 ` [PATCH v3 07/19] LoongArch: lib: General routines Yao Zi
2026-08-21 8:42 ` [PATCH v3 08/19] LoongArch: CPU assembly routines Yao Zi
2026-08-21 8:42 ` [PATCH v3 09/19] LoongArch: Exception handling Yao Zi
2026-08-21 8:42 ` [PATCH v3 10/19] LoongArch: Boot Image bits Yao Zi
2026-08-21 16:20 ` Tom Rini
2026-08-22 17:52 ` Yao Zi
2026-08-22 19:03 ` Tom Rini
2026-08-22 19:06 ` Tom Rini
2026-08-22 20:47 ` Yao Zi
2026-08-21 8:42 ` [PATCH v3 11/19] LoongArch: Generic platform type Yao Zi
2026-08-21 8:42 ` [PATCH v3 12/19] cpu: Add loongarch_cpu driver Yao Zi
2026-08-21 8:42 ` [PATCH v3 13/19] timer: Add loongarch_timer driver Yao Zi
2026-08-21 8:42 ` [PATCH v3 14/19] board: emulation: Add qemu-loongarch Yao Zi
2026-08-21 16:20 ` Tom Rini
2026-08-22 20:40 ` Yao Zi
2026-08-22 20:51 ` Tom Rini
2026-08-21 8:42 ` [PATCH v3 15/19] efi: LoongArch: Define LoongArch bits everywhere Yao Zi
2026-08-21 8:42 ` [PATCH v3 16/19] efi: LoongArch: Implement everything Yao Zi
2026-08-21 8:42 ` [PATCH v3 17/19] doc: arch: Add documentation for LoongArch Yao Zi
2026-08-21 8:42 ` [PATCH v3 18/19] MAINTAINERS: Add entry " Yao Zi
2026-08-21 8:42 ` [PATCH v3 19/19] CI: Wire up qemu-loongarch64 Yao Zi
2026-08-21 16:21 ` Tom Rini
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.