From bd6578e46d1ba93ffe6e00147704d7d18c7e5573 Mon Sep 17 00:00:00 2001 From: Terry Lv Date: Wed, 24 Feb 2010 18:34:13 +0800 Subject: ENGR00120520: Enable MMU for mx51 and mx35 MMU enable code is missed in mx51 and mx35 u-boot. So add these codes. Signed-off-by: Terry Lv --- include/asm-arm/arch-mx51/mmu.h | 82 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 81 insertions(+), 1 deletion(-) (limited to 'include/asm-arm/arch-mx51') diff --git a/include/asm-arm/arch-mx51/mmu.h b/include/asm-arm/arch-mx51/mmu.h index a701c72..e80cfc9 100644 --- a/include/asm-arm/arch-mx51/mmu.h +++ b/include/asm-arm/arch-mx51/mmu.h @@ -1,5 +1,5 @@ /* - * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. */ /* @@ -14,6 +14,8 @@ #ifndef __ARM_ARCH_MMU_H #define __ARM_ARCH_MMU_H +#include + /* * Translation Table Base Bit Masks */ @@ -132,4 +134,82 @@ union ARM_MMU_FIRST_LEVEL_DESCRIPTOR { ARM_ACCESS_TYPE_NO_ACCESS(14) | \ ARM_ACCESS_TYPE_NO_ACCESS(15)) +#if defined(CONFIG_MX51_3DS) + +/* + * Translate the virtual address of ram space to physical address + * It is dependent on the implementation of mmu_init + */ +inline void *iomem_to_phys(unsigned long virt) +{ + if (virt < 0x08000000) + return (void *)(virt | PHYS_SDRAM_1); + + if ((virt & 0xF0000000) == PHYS_SDRAM_1) + return (void *)(virt & (~0x08000000)); + + return (void *)virt; +} + +/* + * remap the physical address of ram space to uncacheable virtual address space + * It is dependent on the implementation of hal_mmu_init + */ +void *__ioremap(unsigned long offset, size_t size, unsigned long flags) +{ + if (1 == flags) { + /* 0x98000000~0x9FFFFFFF is uncacheable meory + space which is mapped to SDRAM */ + if ((offset & 0xF0000000) == PHYS_SDRAM_1) + return (void *)(offset |= 0x08000000); + else + return NULL; + } else + return (void *)offset; +} + +#elif defined(CONFIG_MX51_BBG) + +/* + * Translate the virtual address of ram space to physical address + * It is dependent on the implementation of mmu_init + */ +inline void *iomem_to_phys(unsigned long virt) +{ + if (virt < (PHYS_SDRAM_1_SIZE - 0x100000)) + return (void *)(virt + PHYS_SDRAM_1); + + if (virt >= 0xE0000000) + return (void *)((virt - 0xE0000000) + PHYS_SDRAM_1); + + return (void *)virt; +} + +/* + * Remap the physical address of ram space to uncacheable virtual address space + * It is dependent on the implementation of hal_mmu_init + */ +void __iounmap(void *addr) +{ + return; +} + +void *__ioremap(unsigned long offset, size_t size, unsigned long flags) +{ + if (1 == flags) { + /* 0xE0000000~0xFFFFFFFF is uncacheable + meory space which is mapped to SDRAM */ + if (offset >= PHYS_SDRAM_1 && + offset < (PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)) + return (void *)(offset - PHYS_SDRAM_1) + 0xE0000000; + else + return NULL; + } else + return (void *)offset; +} + +#else + #error "No such platforms for MMU!" +#endif + #endif -- cgit v1.1