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| author | Fred Fan <r01011@freescale.com> | 2009-11-19 16:43:08 +0800 |
|---|---|---|
| committer | Fred Fan <r01011@freescale.com> | 2009-11-30 14:07:16 +0800 |
| commit | 3f86cf9693f8b98c44999e81d4067943c634b421 (patch) | |
| tree | 53cc3cd0be7e9087b45d831abd563507ee4ec90f /board/freescale | |
| parent | 9a17d28d0b86b38a0b1a4e361cadbd0cb3628953 (diff) | |
| download | u-boot-imx-3f86cf9693f8b98c44999e81d4067943c634b421.zip u-boot-imx-3f86cf9693f8b98c44999e81d4067943c634b421.tar.gz u-boot-imx-3f86cf9693f8b98c44999e81d4067943c634b421.tar.bz2 | |
ENGR00118579 Enable MMUrel_imx_2.6.31_09.12.00_RC1
To enable MMU, it is porting from redboot.
Enable MMU and enable I/D cache.
Signed-off-by:Fred Fan <r01011@freescale.com>
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/mx35_3stack/mx35_3stack.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/board/freescale/mx35_3stack/mx35_3stack.c b/board/freescale/mx35_3stack/mx35_3stack.c index bd6585b..9eea6ad 100644 --- a/board/freescale/mx35_3stack/mx35_3stack.c +++ b/board/freescale/mx35_3stack/mx35_3stack.c @@ -36,6 +36,10 @@ #include <fsl_esdhc.h> #endif +#ifdef CONFIG_ARCH_MMU +#include <asm/mmu.h> +#include <asm/arch/mmu.h> +#endif DECLARE_GLOBAL_DATA_PTR; @@ -68,6 +72,68 @@ int is_soc_rev(int rev) return (system_rev & 0xFF) - rev; } +#ifdef CONFIG_ARCH_MMU +void board_mmu_init(void) +{ + unsigned long ttb_base = PHYS_SDRAM_1 + 0x40000; + unsigned long i; + + /* + * Set the TTB register + */ + asm volatile ("mcr p15,0,%0,c2,c0,0" : : "r"(ttb_base) /*:*/); + + /* + * Set the Domain Access Control Register + */ + i = ARM_ACCESS_DACR_DEFAULT; + asm volatile ("mcr p15,0,%0,c3,c0,0" : : "r"(i) /*:*/); + + /* + * First clear all TT entries - ie Set them to Faulting + */ + memset((void *)ttb_base, 0, ARM_FIRST_LEVEL_PAGE_TABLE_SIZE); + /* Actual Virtual Size Attributes Function */ + /* Base Base MB cached? buffered? access permissions */ + /* xxx00000 xxx00000 */ + X_ARM_MMU_SECTION(0x000, 0xF00, 0x1, + ARM_UNCACHEABLE, ARM_UNBUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* ROM */ + X_ARM_MMU_SECTION(0x100, 0x100, 0x1, + ARM_UNCACHEABLE, ARM_UNBUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* iRAM */ + X_ARM_MMU_SECTION(0x300, 0x300, 0x1, + ARM_UNCACHEABLE, ARM_UNBUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* L2CC */ + /* Internal Regsisters upto SDRAM*/ + X_ARM_MMU_SECTION(0x400, 0x400, 0x400, + ARM_UNCACHEABLE, ARM_UNBUFFERABLE, + ARM_ACCESS_PERM_RW_RW); + X_ARM_MMU_SECTION(0x800, 0x000, 0x80, + ARM_CACHEABLE, ARM_BUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* SDRAM 0:128M*/ + X_ARM_MMU_SECTION(0x800, 0x800, 0x80, + ARM_CACHEABLE, ARM_BUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* SDRAM 0:128M*/ + X_ARM_MMU_SECTION(0x800, 0x880, 0x80, + ARM_UNCACHEABLE, ARM_UNBUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* SDRAM 0:128M*/ + X_ARM_MMU_SECTION(0x900, 0x900, 0x80, + ARM_CACHEABLE, ARM_BUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* SDRAM 1:128M*/ + X_ARM_MMU_SECTION(0xA00, 0xA00, 0x40, + ARM_CACHEABLE, ARM_BUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* Flash */ + X_ARM_MMU_SECTION(0xB00, 0xB00, 0x20, + ARM_CACHEABLE, ARM_BUFFERABLE, + ARM_ACCESS_PERM_RW_RW); /* PSRAM */ + /* ESDCTL, WEIM, M3IF, EMI, NFC, External I/O */ + X_ARM_MMU_SECTION(0xB20, 0xB20, 0x1E0, + ARM_UNCACHEABLE, ARM_UNBUFFERABLE, + ARM_ACCESS_PERM_RW_RW); +} +#endif + int dram_init(void) { gd->bd->bi_dram[0].start = PHYS_SDRAM_1; |