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| author | H. Peter Anvin <hpa@zytor.com> | 2010-05-09 01:59:58 +0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-05-09 01:59:58 +0400 |
| commit | d7be0ce6afb1df60bc786f57410407ceae92b994 (patch) | |
| tree | 5e91acfc12c833531ad3320f274e0cd96a129973 /arch/powerpc/include/asm/page.h | |
| parent | e08cae4181af9483b04ecfac48f01c8e5a5f27bf (diff) | |
| parent | 66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8 (diff) | |
| download | linux-d7be0ce6afb1df60bc786f57410407ceae92b994.tar.xz | |
Merge commit 'v2.6.34-rc6' into x86/cpu
Diffstat (limited to 'arch/powerpc/include/asm/page.h')
| -rw-r--r-- | arch/powerpc/include/asm/page.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h index e96d52a516ba..53b64be40eb2 100644 --- a/arch/powerpc/include/asm/page.h +++ b/arch/powerpc/include/asm/page.h @@ -108,8 +108,21 @@ extern phys_addr_t kernstart_addr; #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) -#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - MEMORY_START)) +/* + * On Book-E parts we need __va to parse the device tree and we can't + * determine MEMORY_START until then. However we can determine PHYSICAL_START + * from information at hand (program counter, TLB lookup). + * + * On non-Book-E PPC64 PAGE_OFFSET and MEMORY_START are constants so use + * the other definitions for __va & __pa. + */ +#ifdef CONFIG_BOOKE +#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) - PHYSICAL_START + KERNELBASE)) +#define __pa(x) ((unsigned long)(x) + PHYSICAL_START - KERNELBASE) +#else +#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + PAGE_OFFSET - MEMORY_START)) #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + MEMORY_START) +#endif /* * Unfortunately the PLT is in the BSS in the PPC32 ELF ABI, |