diff options
Diffstat (limited to 'include/asm-arm/arch-mx35/mmu.h')
| -rw-r--r-- | include/asm-arm/arch-mx35/mmu.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/include/asm-arm/arch-mx35/mmu.h b/include/asm-arm/arch-mx35/mmu.h index a701c72..1e9a96f 100644 --- a/include/asm-arm/arch-mx35/mmu.h +++ b/include/asm-arm/arch-mx35/mmu.h @@ -1,5 +1,5 @@ /* - * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. */ /* @@ -132,4 +132,41 @@ union ARM_MMU_FIRST_LEVEL_DESCRIPTOR { ARM_ACCESS_TYPE_NO_ACCESS(14) | \ ARM_ACCESS_TYPE_NO_ACCESS(15)) +/* + * 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 __iounmap(void *addr) +{ + return; +} + +void *__ioremap(unsigned long offset, size_t size, unsigned long flags) +{ + if (1 == flags) { + /* 0x88000000~0x87FFFFFF 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; +} + #endif |