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| author | David S. Miller <davem@davemloft.net> | 2009-12-03 12:51:21 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-12-03 12:51:21 -0800 |
| commit | a6c872afb2536f47285e6643f4629dec7520041d (patch) | |
| tree | 4b54e69fc6594f9afc1277520a350db04e578e77 /arch/arm/mach-realview/include/mach/memory.h | |
| parent | 9fe02668fe48a1d546196bc1392330ff28d9bd57 (diff) | |
| parent | 22763c5cf3690a681551162c15d34d935308c8d7 (diff) | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'arch/arm/mach-realview/include/mach/memory.h')
| -rw-r--r-- | arch/arm/mach-realview/include/mach/memory.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/mach-realview/include/mach/memory.h b/arch/arm/mach-realview/include/mach/memory.h index 293c30025e7..2417bbcf97f 100644 --- a/arch/arm/mach-realview/include/mach/memory.h +++ b/arch/arm/mach-realview/include/mach/memory.h @@ -29,4 +29,53 @@ #define PHYS_OFFSET UL(0x00000000) #endif +#if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA) +extern void realview_adjust_zones(int node, unsigned long *size, + unsigned long *hole); +#define arch_adjust_zones(node, size, hole) \ + realview_adjust_zones(node, size, hole) + +#define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_256M - 1) +#define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_256M) +#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_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 |