[loongson-PATCH-v1 12/27] add basic loongson-2f support

wuzhangjin
2009-05-20T22:33:42Z

From: Wu Zhangjin <wuzhangjin@gmail.com>

Loongson2F has built-in DDR2 and PCIX controller. The PCIX controller
have a similar programming interface with FPGA northbridge used in
Loongson2E.

so, the main difference between loongson-2e and loongson-2f is:

loongson-2f has an extra address windows configuration module, which can
be used to map CPU address space to DDR or PCI address space, or map the
PCI-DMA address space to DDR or LIO address space.

herein, the module and the operations are abstracted to loongson.h.

NOTE: this module is only available in 64bit kernel.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
---
arch/mips/Kconfig | 18 +++++
.../mips/include/asm/mach-loongson/dma-coherence.h | 4 +
arch/mips/include/asm/mach-loongson/loongson.h | 79 +++++++++++++++++++-
arch/mips/include/asm/mach-loongson/mem.h | 23 ++++++
arch/mips/include/asm/mach-loongson/pci.h | 30 +++++++-
arch/mips/loongson/common/init.c | 17 ++++
arch/mips/loongson/common/mem.c | 21 ++++-
arch/mips/loongson/common/pci.c | 14 +++-
8 files changed, 197 insertions(+), 9 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b5581d6..2aaa4d0 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1008,6 +1008,21 @@ config CPU_LOONGSON2E
The Loongson 2E processor implements the MIPS III instruction set
with many extensions.

+ It has an internal FPGA northbridge, which is compatiable to
+ bonito64.
+
+config CPU_LOONGSON2F
+ bool "Loongson 2F"
+ depends on SYS_HAS_CPU_LOONGSON2F
+ select CPU_LOONGSON2
+ help
+ The Loongson 2F processor implements the MIPS III instruction set
+ with many extensions.
+
+ Loongson2F have built-in DDR2 and PCIX controller. The PCIX controller
+ have a similar programming interface with FPGA northbridge used in
+ Loongson2E.
+
config CPU_MIPS32_R1
bool "MIPS32 Release 1"
depends on SYS_HAS_CPU_MIPS32_R1
@@ -1255,6 +1270,9 @@ config CPU_LOONGSON2
config SYS_HAS_CPU_LOONGSON2E
bool

+config SYS_HAS_CPU_LOONGSON2F
+ bool
+
config SYS_HAS_CPU_MIPS32_R1
bool

diff --git a/arch/mips/include/asm/mach-loongson/dma-coherence.h b/arch/mips/include/asm/mach-loongson/dma-coherence.h
index f27d0f8..6ba8279 100644
--- a/arch/mips/include/asm/mach-loongson/dma-coherence.h
+++ b/arch/mips/include/asm/mach-loongson/dma-coherence.h
@@ -27,7 +27,11 @@ static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,

static inline unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
{
+#if defined(CONFIG_CPU_LOONGSON2F) & defined(CONFIG_64BIT)
+ return (dma_addr > 0x8fffffff) ? dma_addr : (dma_addr & 0x0fffffff);
+#else
return dma_addr & 0x7fffffff;
+#endif
}

static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr)
diff --git a/arch/mips/include/asm/mach-loongson/loongson.h b/arch/mips/include/asm/mach-loongson/loongson.h
index 29c9730..8ddfbd3 100644
--- a/arch/mips/include/asm/mach-loongson/loongson.h
+++ b/arch/mips/include/asm/mach-loongson/loongson.h
@@ -221,5 +221,82 @@ extern void mach_prepare_shutdown(void);
#define LOONGSON_PCIMAP_WIN(WIN, ADDR) \
((((ADDR)>>26) & LOONGSON_PCIMAP_PCIMAP_LO0) << ((WIN)*6))

-#endif /* __LOONGSON_H */
+/*
+ * address windows configuration module
+ *
+ * loongson2e do not have this module
+ */
+#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
+
+/* address window config module base address */
+#define LOONGSON_ADDRWINCFG_BASE 0x3ff00000ul
+#define LOONGSON_ADDRWINCFG_SIZE 0x180
+
+extern unsigned long _loongson_addrwincfg_base;
+#define LOONGSON_ADDRWINCFG(offset) \
+ (*(u64 *)(_loongson_addrwincfg_base + (offset)))
+
+#define CPU_WIN0_BASE LOONGSON_ADDRWINCFG(0x00)
+#define CPU_WIN1_BASE LOONGSON_ADDRWINCFG(0x08)
+#define CPU_WIN2_BASE LOONGSON_ADDRWINCFG(0x10)
+#define CPU_WIN3_BASE LOONGSON_ADDRWINCFG(0x18)
+
+#define CPU_WIN0_MASK LOONGSON_ADDRWINCFG(0x20)
+#define CPU_WIN1_MASK LOONGSON_ADDRWINCFG(0x28)
+#define CPU_WIN2_MASK LOONGSON_ADDRWINCFG(0x30)
+#define CPU_WIN3_MASK LOONGSON_ADDRWINCFG(0x38)
+
+#define CPU_WIN0_MMAP LOONGSON_ADDRWINCFG(0x40)
+#define CPU_WIN1_MMAP LOONGSON_ADDRWINCFG(0x48)
+#define CPU_WIN2_MMAP LOONGSON_ADDRWINCFG(0x50)
+#define CPU_WIN3_MMAP LOONGSON_ADDRWINCFG(0x58)
+
+#define PCIDMA_WIN0_BASE LOONGSON_ADDRWINCFG(0x60)
+#define PCIDMA_WIN1_BASE LOONGSON_ADDRWINCFG(0x68)
+#define PCIDMA_WIN2_BASE LOONGSON_ADDRWINCFG(0x70)
+#define PCIDMA_WIN3_BASE LOONGSON_ADDRWINCFG(0x78)
+
+#define PCIDMA_WIN0_MASK LOONGSON_ADDRWINCFG(0x80)
+#define PCIDMA_WIN1_MASK LOONGSON_ADDRWINCFG(0x88)
+#define PCIDMA_WIN2_MASK LOONGSON_ADDRWINCFG(0x90)
+#define PCIDMA_WIN3_MASK LOONGSON_ADDRWINCFG(0x98)
+
+#define PCIDMA_WIN0_MMAP LOONGSON_ADDRWINCFG(0xa0)
+#define PCIDMA_WIN1_MMAP LOONGSON_ADDRWINCFG(0xa8)
+#define PCIDMA_WIN2_MMAP LOONGSON_ADDRWINCFG(0xb0)
+#define PCIDMA_WIN3_MMAP LOONGSON_ADDRWINCFG(0xb8)
+
+#define ADDRWIN_WIN0 0
+#define ADDRWIN_WIN1 1
+#define ADDRWIN_WIN2 2
+#define ADDRWIN_WIN3 3
+
+#define ADDRWIN_MAP_DST_DDR 0
+#define ADDRWIN_MAP_DST_PCI 1
+#define ADDRWIN_MAP_DST_LIO 1
+
+/*
+ * s: CPU, PCIDMA
+ * d: DDR, PCI, LIO
+ * win: 0, 1, 2, 3
+ * src: map source
+ * dst: map destination
+ * size: ~mask + 1
+ */
+#define LOONGSON_ADDRWIN_CFG(s, d, w, src, dst, size) do {\
+ s##_WIN##w##_BASE = (src); \
+ s##_WIN##w##_MMAP = (src) | ADDRWIN_MAP_DST_##d; \
+ s##_WIN##w##_MASK = ~(size-1); \
+} while (0);
+
+#define LOONGSON_ADDRWIN_CPUTOPCI(win, src, dst, size) \
+ LOONGSON_ADDRWIN_CFG(CPU, PCI, win, src, dst, size)
+#define LOONGSON_ADDRWIN_CPUTODDR(win, src, dst, size) \
+ LOONGSON_ADDRWIN_CFG(CPU, DDR, win, src, dst, size)
+#define LOONGSON_ADDRWIN_PCITODDR(win, src, dst, size) \
+ LOONGSON_ADDRWIN_CFG(PCIDMA, DDR, win, src, dst, size)
+
+#endif /* ! CONFIG_CPU_LOONGSON2F && CONFIG_64BIT */
+
+#endif /* __LOONGSON_H */

diff --git a/arch/mips/include/asm/mach-loongson/mem.h b/arch/mips/include/asm/mach-loongson/mem.h
index ad01dc2..fb53be0 100644
--- a/arch/mips/include/asm/mach-loongson/mem.h
+++ b/arch/mips/include/asm/mach-loongson/mem.h
@@ -1,8 +1,31 @@
#ifndef __MEM_H
#define __MEM_H

+/*
+ * high memory space
+ *
+ * in loongson2e, starts from 512M
+ * in loongson2f, starts from 2G + 256M
+ */
+#ifdef CONFIG_CPU_LOONGSON2E
#define LOONGSON_HIGHMEM_START 0x20000000
+#else
+#define LOONGSON_HIGHMEM_START 0x90000000
+#endif
+
+/*
+ * the peripheral registers(MMIO):
+ *
+ * On the Lemote Loongson 2e system, reside between 0x1000:0000 and 0x2000:0000.
+ * On the Lemote Loongson 2f system, reside between 0x1000:0000 and 0x8000:0000.
+ */
+
#define LOONGSON_MMIO_MEM_START 0x10000000
+
+#ifdef CONFIG_CPU_LOONGSON2E
#define LOONGSON_MMIO_MEM_END 0x20000000
+#else
+#define LOONGSON_MMIO_MEM_END 0x80000000
+#endif

#endif /* !__MEM_H */
diff --git a/arch/mips/include/asm/mach-loongson/pci.h b/arch/mips/include/asm/mach-loongson/pci.h
index 8f02486..cdec41c 100644
--- a/arch/mips/include/asm/mach-loongson/pci.h
+++ b/arch/mips/include/asm/mach-loongson/pci.h
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2008 Zhang Le <r0bertz@gentoo.org>
+ * Copyright (c) 2009 Wu Zhangjin <wuzj@lemote.com>
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
@@ -24,8 +25,35 @@

extern struct pci_ops loongson_pci_ops;

+/* this is an offset from mips_io_port_base */
+#define LOONGSON_PCI_IO_START 0x00004000UL
+
+#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
+
+/*
+ * we use address window2 to map cpu address space to pci space
+ * window2: cpu [1G, 2G] -> pci [1G, 2G]
+ * why not use window 0 & 1? because they are used by cpu when booting.
+ * window0: cpu [0, 256M] -> ddr [0, 256M]
+ * window1: cpu [256M, 512M] -> pci [256M, 512M]
+ */
+
+/* the smallest LOONGSON_CPU_MEM_SRC can be 512M */
+#define LOONGSON_CPU_MEM_SRC 0x40000000ul /* 1G */
+#define LOONGSON_PCI_MEM_DST LOONGSON_CPU_MEM_SRC
+
+#define LOONGSON_PCI_MEM_START LOONGSON_PCI_MEM_DST
+#define LOONGSON_PCI_MEM_END (0x80000000ul-1) /* 2G */
+
+#define MMAP_CPUTOPCI_SIZE (LOONGSON_PCI_MEM_END - \
+ LOONGSON_PCI_MEM_START + 1)
+
+#else /* loongson2f/32bit & loongson2e */
+
#define LOONGSON_PCI_MEM_START 0x14000000UL
#define LOONGSON_PCI_MEM_END 0x1fffffffUL
-#define LOONGSON_PCI_IO_START 0x00004000UL
+
+#endif /* !(defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT))*/
+

#endif /* !_LOONGSON_PCI_H_ */
diff --git a/arch/mips/loongson/common/init.c b/arch/mips/loongson/common/init.c
index 76e6fda..9bbd06f 100644
--- a/arch/mips/loongson/common/init.c
+++ b/arch/mips/loongson/common/init.c
@@ -22,6 +22,17 @@

#include <loongson.h>

+#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
+unsigned long _loongson_addrwincfg_base;
+
+/* Loongson CPU address windows config space base address */
+static inline void set_loongson_addrwincfg_base(unsigned long base)
+{
+ *(unsigned long *)&_loongson_addrwincfg_base = base;
+ barrier();
+}
+#endif
+
void __init prom_init(void)
{
/* init mach type, does we need to init it?? */
@@ -31,6 +42,12 @@ void __init prom_init(void)
set_io_port_base((unsigned long)
ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE));

+#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
+ set_loongson_addrwincfg_base((unsigned long)
+ ioremap(LOONGSON_ADDRWINCFG_BASE,
+ LOONGSON_ADDRWINCFG_SIZE));
+#endif
+
prom_init_cmdline();
prom_init_memory();
}
diff --git a/arch/mips/loongson/common/mem.c b/arch/mips/loongson/common/mem.c
index 17a7278..9e0b6e0 100644
--- a/arch/mips/loongson/common/mem.c
+++ b/arch/mips/loongson/common/mem.c
@@ -17,6 +17,23 @@ void __init prom_init_memory(void)
{
add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
#ifdef CONFIG_64BIT
+#ifdef CONFIG_CPU_LOONGSON2F
+ {
+ int bit;
+
+ bit = fls(memsize + highmemsize);
+ if (bit != ffs(memsize + highmemsize))
+ bit += 20;
+ else
+ bit = bit + 20 - 1;
+
+ /* set cpu window3 to map CPU to DDR: 2G -> 2G */
+ LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul,
+ 0x80000000ul, (1 << bit));
+ mmiowb();
+ }
+#endif /* CONFIG_CPU_LOONGSON2F */
+
if (highmemsize > 0) {
add_memory_region(LOONGSON_HIGHMEM_START,
highmemsize << 20, BOOT_MEM_RAM);
@@ -30,10 +47,6 @@ int __uncached_access(struct file *file, unsigned long addr)
if (file->f_flags & O_SYNC)
return 1;

- /*
- * On the Lemote Loongson 2e system, the peripheral registers
- * reside between 0x1000:0000 and 0x2000:0000.
- */
return addr >= __pa(high_memory) ||
((addr >= LOONGSON_MMIO_MEM_START) && \
(addr < LOONGSON_MMIO_MEM_END));
diff --git a/arch/mips/loongson/common/pci.c b/arch/mips/loongson/common/pci.c
index e97c845..e8291c3 100644
--- a/arch/mips/loongson/common/pci.c
+++ b/arch/mips/loongson/common/pci.c
@@ -30,15 +30,15 @@
#include <pci.h>

static struct resource loongson_pci_mem_resource = {
- .name = "LOONGSON PCI MEM",
+ .name = "pci memory space",
.start = LOONGSON_PCI_MEM_START,
.end = LOONGSON_PCI_MEM_END,
.flags = IORESOURCE_MEM,
};

static struct resource loongson_pci_io_resource = {
- .name = "LOONGSON PCI IO MEM",
- .start = LOONGSON_PCI_IO_START,
+ .name = "pci io space",
+ .start = LOONGSON_PCI_IO_START, /* reserve regacy I/O space */
.end = IO_SPACE_LIMIT,
.flags = IORESOURCE_IO,
};
@@ -85,6 +85,14 @@ static void __init ict_pcimap(void)
/* can not change gnt to break pci transfer when device's gnt not
deassert for some broken device */
LOONGSON_PXARB_CFG = 0x00fe0105ul;
+
+#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
+ /*
+ * set cpu addr window2 to map CPU address space to PCI address space
+ */
+ LOONGSON_ADDRWIN_CPUTOPCI(ADDRWIN_WIN2, LOONGSON_CPU_MEM_SRC,
+ LOONGSON_PCI_MEM_DST, MMAP_CPUTOPCI_SIZE);
+#endif
}

static int __init pcibios_init(void)
--
1.6.2.1