diff options
Diffstat (limited to 'arch/arm/mach-realview/include/mach/memory.h')
| -rw-r--r-- | arch/arm/mach-realview/include/mach/memory.h | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/arch/arm/mach-realview/include/mach/memory.h b/arch/arm/mach-realview/include/mach/memory.h index 293c30025e7..db09170e383 100644 --- a/arch/arm/mach-realview/include/mach/memory.h +++ b/arch/arm/mach-realview/include/mach/memory.h @@ -24,9 +24,50 @@ * Physical DRAM offset. */ #ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET -#define PHYS_OFFSET UL(0x70000000) +#define PLAT_PHYS_OFFSET UL(0x70000000) #else -#define PHYS_OFFSET UL(0x00000000) +#define PLAT_PHYS_OFFSET UL(0x00000000) #endif +#ifdef CONFIG_SPARSEMEM + +/* + * Sparsemem definitions for RealView PBX. + * + * The RealView PBX board has another block of 512MB of RAM at 0x20000000, + * however only the block at 0x70000000 (or the 256MB mirror at 0x00000000) + * may be used for DMA. + * + * The macros below define a section size of 256MB and a non-linear virtual to + * physical mapping: + * + * 256MB @ 0x00000000 -> PAGE_OFFSET + * 512MB @ 0x20000000 -> PAGE_OFFSET + 0x10000000 + * 256MB @ 0x80000000 -> PAGE_OFFSET + 0x30000000 + */ +#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET +#error "SPARSEMEM not available with REALVIEW_HIGH_PHYS_OFFSET" +#endif + +#define MAX_PHYSMEM_BITS 32 +#define SECTION_SIZE_BITS 28 + +/* bank page offsets */ +#define PAGE_OFFSET1 (PAGE_OFFSET + 0x10000000) +#define PAGE_OFFSET2 (PAGE_OFFSET + 0x30000000) + +#define PHYS_OFFSET PLAT_PHYS_OFFSET + +#define __phys_to_virt(phys) \ + ((phys) >= 0x80000000 ? (phys) - 0x80000000 + PAGE_OFFSET2 : \ + (phys) >= 0x20000000 ? (phys) - 0x20000000 + PAGE_OFFSET1 : \ + (phys) + PAGE_OFFSET) + +#define __virt_to_phys(virt) \ + ((virt) >= PAGE_OFFSET2 ? (virt) - PAGE_OFFSET2 + 0x80000000 : \ + (virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + 0x20000000 : \ + (virt) - PAGE_OFFSET) + +#endif /* CONFIG_SPARSEMEM */ + #endif |