[PATCH V4 05/16] MIPS: Loongson: Add UEFI-like firmware interface support.

Huacai Chen
2012-08-03T07:11:18Z

The new UEFI-like firmware interface has 3 advantages:

1, Firmware export a physical memory map which is similar to X86's
E820 map, so prom_init_memory() will be more elegant that #ifdef
clauses can be removed.
2, Firmware export a pci irq routing table, we no longer need pci
irq routing fixup in kernel's code.
3, Firmware has a built-in vga bios, and its address is exported,
the linux kernel no longer need an embedded blob.

With the new interface, Loongson-3A/2G and all their successors can use
a unified kernel. All Loongson-based machines support this new interface
except 2E/2F series.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
---
arch/mips/include/asm/mach-loongson/boot_param.h | 151 ++++++++++++++++++++++
arch/mips/include/asm/mach-loongson/loongson.h | 4 +-
arch/mips/loongson/common/env.c | 67 ++++++++--
arch/mips/loongson/common/init.c | 9 +-
arch/mips/loongson/common/mem.c | 42 ++++++
arch/mips/loongson/common/pci.c | 6 +-
arch/mips/loongson/common/reset.c | 14 ++
7 files changed, 273 insertions(+), 20 deletions(-)
create mode 100644 arch/mips/include/asm/mach-loongson/boot_param.h

diff --git a/arch/mips/include/asm/mach-loongson/boot_param.h b/arch/mips/include/asm/mach-loongson/boot_param.h
new file mode 100644
index 0000000..9ab243c
--- /dev/null
+++ b/arch/mips/include/asm/mach-loongson/boot_param.h
@@ -0,0 +1,151 @@
+#ifndef __ASM_MACH_LOONGSON_BOOT_PARAM_H_
+#define __ASM_MACH_LOONGSON_BOOT_PARAM_H_
+
+#define SYSTEM_RAM_LOW 1
+#define SYSTEM_RAM_HIGH 2
+#define MEM_RESERVED 3
+#define PCI_IO 4
+#define PCI_MEM 5
+#define LOONGSON_CFG_REG 6
+#define VIDEO_ROM 7
+#define ADAPTER_ROM 8
+#define ACPI_TABLE 9
+#define MAX_MEMORY_TYPE 10
+
+#define LOONGSON3_BOOT_MEM_MAP_MAX 128
+struct efi_memory_map_loongson{
+ u16 vers; /* version of efi_memory_map */
+ u32 nr_map; /* number of memory_maps */
+ u32 mem_freq; /* memory frequence */
+ struct mem_map{
+ u32 node_id; /* node_id which memory attached to */
+ u32 mem_type; /* system memory, pci memory, pci io, etc. */
+ u64 mem_start; /* memory map start address */
+ u32 mem_size; /* each memory_map size, not the total size */
+ }map[LOONGSON3_BOOT_MEM_MAP_MAX];
+}__attribute__((packed));
+
+enum loongson_cpu_type
+{
+ Loongson_2E,
+ Loongson_2F,
+ Loongson_3A,
+ Loongson_3B,
+ Loongson_1A,
+ Loongson_1B
+};
+
+/*
+ * Capability and feature descriptor structure for MIPS CPU
+ */
+struct efi_cpuinfo_loongson {
+ u16 vers; /* version of efi_cpuinfo_loongson */
+ u32 processor_id; /* PRID, e.g. 6305, 6306 */
+ enum loongson_cpu_type cputype; /* 3A, 3B, etc. */
+ u32 total_node; /* num of total numa nodes */
+ u32 cpu_startup_core_id; /* Core id: */
+ u32 cpu_clock_freq; /* cpu_clock */
+ u32 nr_cpus;
+}__attribute__((packed));
+
+struct system_loongson{
+ u16 vers; /* version of system_loongson */
+ u32 ccnuma_smp; /* 0:no numa; 1: has numa */
+ u32 sing_double_channel; /* 1:single; 2:double */
+}__attribute__((packed));
+
+struct irq_source_routing_table {
+ u16 vers;
+ u16 size;
+ u16 rtr_bus;
+ u16 rtr_devfn;
+ u32 vendor;
+ u32 device;
+ u32 PIC_type; /* conform use HT or PCI to route to CPU-PIC */
+ u64 ht_int_bit; /* 3A: 1<<24; 3B:1<<16 */
+ u64 ht_enable; /* irqs used in this PIC.eg:3a-0x0000d17a */
+ u32 node_id; /* node id, 0x0—0, 0x1—1; 0x10—2；0x11—3；0x100—4 */
+ u64 pci_mem_start_addr;
+ u64 pci_mem_end_addr;
+ u64 pci_io_start_addr;
+ u64 pci_io_end_addr;
+ u64 pci_config_addr;
+}__attribute__((packed));
+
+struct interface_info{
+ u16 vers; /* version of the specificition */
+ u16 size;
+ u8 flag;
+ char description[64];
+}__attribute__((packed));
+
+#define MAX_RESOURCE_NUMBER 128
+struct resource_loongson {
+ u64 start; /* resource start address */
+ u64 end; /* resource end address */
+ char name[64];
+ u32 flags;
+};
+
+struct archdev_data {}; /* arch specific additions */
+
+struct board_devices{
+ char name[64]; /* hold the device name */
+ u32 num_resources; /* number of device_resource */
+ struct resource_loongson resource[MAX_RESOURCE_NUMBER]; /* for each device's resource */
+ /* arch specific additions */
+ struct archdev_data archdata;
+};
+
+struct loongson_special_attribute{
+ u16 vers; /* version of this special */
+ char special_name[64]; /* special_atribute_name */
+ u32 loongson_special_type; /* type of special device */
+ struct resource_loongson resource[MAX_RESOURCE_NUMBER]; /* for each device's resource */
+};
+
+struct loongson_params{
+ u64 memory_offset; /* efi_memory_map_loongson struct offset */
+ u64 cpu_offset; /* efi_cpuinfo_loongson struct offset */
+ u64 system_offset; /* system_loongson struct offset */
+ u64 irq_offset; /* irq_source_routing_table struct offset */
+ u64 interface_offset; /* interface_info struct offset */
+ u64 special_offset; /* loongson_special_attribute struct offset */
+ u64 boarddev_table_offset; /* board_devices offset */
+};
+
+struct smbios_tables {
+ u16 vers; /* version of smbios */
+ u64 vga_bios; /* vga_bios address */
+ struct loongson_params lp;
+};
+
+struct efi_reset_system_t{
+ u64 ResetCold;
+ u64 ResetWarm;
+ u64 ResetType;
+ u64 Shutdown;
+};
+
+struct efi_loongson {
+ u64 mps; /* MPS table */
+ u64 acpi; /* ACPI table (IA64 ext 0.71) */
+ u64 acpi20; /* ACPI table (ACPI 2.0) */
+ struct smbios_tables smbios; /* SM BIOS table */
+ u64 sal_systab; /* SAL system table */
+ u64 boot_info; /* boot info table */
+};
+
+struct boot_params{
+ struct efi_loongson efi;
+ struct efi_reset_system_t reset_system;
+};
+
+extern u32 nr_cpus_loongson;
+extern enum loongson_cpu_type cputype;
+extern struct efi_memory_map_loongson *emap;
+extern u64 ht_control_base;
+extern u64 pci_mem_start_addr, pci_mem_end_addr;
+extern u64 loongson_pciio_base;
+extern u64 vgabios_addr;
+#endif
diff --git a/arch/mips/include/asm/mach-loongson/loongson.h b/arch/mips/include/asm/mach-loongson/loongson.h
index 5222a00..6a1bcf3 100644
--- a/arch/mips/include/asm/mach-loongson/loongson.h
+++ b/arch/mips/include/asm/mach-loongson/loongson.h
@@ -24,8 +24,8 @@ extern void mach_prepare_reboot(void);
extern void mach_prepare_shutdown(void);

/* environment arguments from bootloader */
-extern unsigned long cpu_clock_freq;
-extern unsigned long memsize, highmemsize;
+extern u32 cpu_clock_freq;
+extern u32 memsize, highmemsize;

/* loongson-specific command line, env and memory initialization */
extern void __init prom_init_memory(void);
diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c
index d93830a..d2d8613 100644
--- a/arch/mips/loongson/common/env.c
+++ b/arch/mips/loongson/common/env.c
@@ -18,37 +18,53 @@
* option) any later version.
*/
#include <linux/module.h>
-
#include <asm/bootinfo.h>
-
#include <loongson.h>
+#include <boot_param.h>
+
+struct boot_params *boot_p;
+struct loongson_params *loongson_p;
+
+struct efi_cpuinfo_loongson *ecpu;
+struct efi_memory_map_loongson *emap;
+struct system_loongson *esys;
+struct irq_source_routing_table *eirq_source;
+
+u64 ht_control_base;
+u64 pci_mem_start_addr, pci_mem_end_addr;
+u64 loongson_pciio_base;
+u64 vgabios_addr;
+u64 poweroff_addr, restart_addr;

-unsigned long cpu_clock_freq;
+enum loongson_cpu_type cputype;
+unsigned int nr_cpus_loongson = NR_CPUS;
+
+u32 cpu_clock_freq;
EXPORT_SYMBOL(cpu_clock_freq);
-unsigned long memsize, highmemsize;

#define parse_even_earlier(res, option, p) \
do { \
unsigned int tmp __maybe_unused; \
\
if (strncmp(option, (char *)p, strlen(option)) == 0) \
- tmp = strict_strtol((char *)p + strlen(option"="), 10, &res); \
+ tmp = kstrtou32((char *)p + strlen(option"="), 10, &res); \
} while (0)

void __init prom_init_env(void)
{
/* pmon passes arguments in 32bit pointers */
- int *_prom_envp;
- unsigned long bus_clock;
unsigned int processor_id;
+
+#ifndef CONFIG_UEFI_FIRMWARE_INTERFACE
+ int *_prom_envp;
long l;
+ extern u32 memsize, highmemsize;

/* firmware arguments are initialized in head.S */
_prom_envp = (int *)fw_arg2;

l = (long)*_prom_envp;
while (l != 0) {
- parse_even_earlier(bus_clock, "busclock", l);
parse_even_earlier(cpu_clock_freq, "cpuclock", l);
parse_even_earlier(memsize, "memsize", l);
parse_even_earlier(highmemsize, "highmemsize", l);
@@ -57,8 +73,32 @@ void __init prom_init_env(void)
}
if (memsize == 0)
memsize = 256;
- if (bus_clock == 0)
- bus_clock = 66000000;
+#else
+ /* firmware arguments are initialized in head.S */
+ boot_p = (struct boot_params *)fw_arg2;
+ loongson_p = &(boot_p->efi.smbios.lp);
+
+ ecpu = (struct efi_cpuinfo_loongson *)((u64)loongson_p + loongson_p->cpu_offset);
+ emap = (struct efi_memory_map_loongson *)((u64)loongson_p + loongson_p->memory_offset);
+ eirq_source = (struct irq_source_routing_table *)((u64)loongson_p + loongson_p->irq_offset);
+
+ cputype = ecpu->cputype;
+ nr_cpus_loongson = ecpu->nr_cpus;
+ cpu_clock_freq = ecpu->cpu_clock_freq;
+ if (nr_cpus_loongson > NR_CPUS || nr_cpus_loongson == 0)
+ nr_cpus_loongson = NR_CPUS;
+
+ pci_mem_start_addr = eirq_source->pci_mem_start_addr;
+ pci_mem_end_addr = eirq_source->pci_mem_end_addr;
+ loongson_pciio_base = eirq_source->pci_io_start_addr;
+
+ poweroff_addr = boot_p->reset_system.Shutdown;
+ restart_addr = boot_p->reset_system.ResetWarm;
+ pr_info("Shutdown Addr: %llx Reset Addr: %llx\n", poweroff_addr, restart_addr);
+
+ ht_control_base = 0x90000EFDFB000000; /* has no interface now */
+ vgabios_addr = boot_p->efi.smbios.vga_bios;
+#endif
if (cpu_clock_freq == 0) {
processor_id = (&current_cpu_data)->processor_id;
switch (processor_id & PRID_REV_MASK) {
@@ -68,12 +108,13 @@ void __init prom_init_env(void)
case PRID_REV_LOONGSON2F:
cpu_clock_freq = 797000000;
break;
+ case PRID_REV_LOONGSON3A:
+ cpu_clock_freq = 900000000;
+ break;
default:
cpu_clock_freq = 100000000;
break;
}
}
-
- pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
- bus_clock, cpu_clock_freq, memsize, highmemsize);
+ pr_info("CpuClock = %u\n", cpu_clock_freq);
}
diff --git a/arch/mips/loongson/common/init.c b/arch/mips/loongson/common/init.c
index 19d3415..1c29b19 100644
--- a/arch/mips/loongson/common/init.c
+++ b/arch/mips/loongson/common/init.c
@@ -17,10 +17,6 @@ unsigned long __maybe_unused _loongson_addrwincfg_base;

void __init prom_init(void)
{
- /* init base address of io space */
- set_io_port_base((unsigned long)
- ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
-
#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
_loongson_addrwincfg_base = (unsigned long)
ioremap(LOONGSON_ADDRWINCFG_BASE, LOONGSON_ADDRWINCFG_SIZE);
@@ -28,6 +24,11 @@ void __init prom_init(void)

prom_init_cmdline();
prom_init_env();
+
+ /* init base address of io space */
+ set_io_port_base((unsigned long)
+ ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));
+
prom_init_memory();

/*init the uart base address */
diff --git a/arch/mips/loongson/common/mem.c b/arch/mips/loongson/common/mem.c
index 30eba60..8a24b04 100644
--- a/arch/mips/loongson/common/mem.c
+++ b/arch/mips/loongson/common/mem.c
@@ -11,9 +11,14 @@
#include <asm/bootinfo.h>

#include <loongson.h>
+#include <boot_param.h>
#include <mem.h>
#include <pci.h>

+#ifndef CONFIG_UEFI_FIRMWARE_INTERFACE
+
+u32 memsize, highmemsize;
+
void __init prom_init_memory(void)
{
add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
@@ -49,6 +54,43 @@ void __init prom_init_memory(void)
#endif /* !CONFIG_64BIT */
}

+#else /* CONFIG_UEFI_FIRMWARE_INTERFACE */
+
+void __init prom_init_memory(void)
+{
+ int i;
+ u32 node_id;
+ u32 mem_type;
+
+ /* parse memory information */
+ for (i = 0; i < emap->nr_map; i++){
+ node_id = emap->map[i].node_id;
+ mem_type = emap->map[i].mem_type;
+
+ if (node_id == 0) {
+ switch (mem_type) {
+ case SYSTEM_RAM_LOW:
+ add_memory_region(emap->map[i].mem_start,
+ emap->map[i].mem_size << 20,
+ BOOT_MEM_RAM);
+ break;
+ case SYSTEM_RAM_HIGH:
+ add_memory_region(emap->map[i].mem_start,
+ emap->map[i].mem_size << 20,
+ BOOT_MEM_RAM);
+ break;
+ case MEM_RESERVED:
+ add_memory_region(emap->map[i].mem_start,
+ emap->map[i].mem_size << 20,
+ BOOT_MEM_RESERVED);
+ break;
+ }
+ }
+ }
+}
+
+#endif /* CONFIG_UEFI_FIRMWARE_INTERFACE */
+
/* override of arch/mips/mm/cache.c: __uncached_access */
int __uncached_access(struct file *file, unsigned long addr)
{
diff --git a/arch/mips/loongson/common/pci.c b/arch/mips/loongson/common/pci.c
index 31d8c5e..0da387a 100644
--- a/arch/mips/loongson/common/pci.c
+++ b/arch/mips/loongson/common/pci.c
@@ -11,6 +11,7 @@

#include <pci.h>
#include <loongson.h>
+#include <boot_param.h>

static struct resource loongson_pci_mem_resource = {
.name = "pci memory space",
@@ -82,7 +83,10 @@ static int __init pcibios_init(void)
setup_pcimap();

loongson_pci_controller.io_map_base = mips_io_port_base;
-
+#ifdef CONFIG_UEFI_FIRMWARE_INTERFACE
+ loongson_pci_mem_resource.start = pci_mem_start_addr;
+ loongson_pci_mem_resource.end = pci_mem_end_addr;
+#endif
register_pci_controller(&loongson_pci_controller);

return 0;
diff --git a/arch/mips/loongson/common/reset.c b/arch/mips/loongson/common/reset.c
index 9e10d62..55c666b 100644
--- a/arch/mips/loongson/common/reset.c
+++ b/arch/mips/loongson/common/reset.c
@@ -36,17 +36,31 @@ static inline void loongson_reboot(void)

static void loongson_restart(char *command)
{
+#ifndef CONFIG_UEFI_FIRMWARE_INTERFACE
/* do preparation for reboot */
mach_prepare_reboot();

/* reboot via jumping to boot base address */
loongson_reboot();
+#else
+ extern u64 restart_addr;
+ void (*fw_restart)(void) = (void *)restart_addr;
+
+ fw_restart();
+#endif
}

static void loongson_poweroff(void)
{
+#ifndef CONFIG_UEFI_FIRMWARE_INTERFACE
mach_prepare_shutdown();
unreachable();
+#else
+ extern u64 poweroff_addr;
+ void (*fw_poweroff)(void) = (void *)poweroff_addr;
+
+ fw_poweroff();
+#endif
}

static void loongson_halt(void)
--
1.7.7.3