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[MIPS] Introduce __pa_symbol()

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This patch introduces __pa_symbol() macro which should be used to
calculate the physical address of kernel symbols. It also relies
on RELOC_HIDE() to avoid any compiler's oddities when doing
arithmetics on symbols.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Franck Bui-Huu 2006-10-19 13:20:02 +02:00 committed by Ralf Baechle
parent d4df6d4e7a
commit 8431fd094d
1 changed files with 1 additions and 0 deletions
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include/asm-mips/page.h
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@ -142,6 +142,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#define __pa_page_offset(x) PAGE_OFFSET
#endif
#define __pa(x) ((unsigned long)(x) - __pa_page_offset(x))
#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)