diff options
Diffstat (limited to 'include/asm-ppc/page.h')
| -rw-r--r-- | include/asm-ppc/page.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/asm-ppc/page.h b/include/asm-ppc/page.h index 55168a8b2..1be8ddfa5 100644 --- a/include/asm-ppc/page.h +++ b/include/asm-ppc/page.h @@ -77,7 +77,7 @@ typedef unsigned long pgprot_t; #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) extern void clear_page(void *page); -#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) +extern void copy_page(void *to, void *from); /* map phys->virtual and virtual->phys for RAM pages */ static inline unsigned long ___pa(unsigned long v) @@ -113,6 +113,21 @@ static inline void* ___va(unsigned long p) #define MAP_PAGE_RESERVED (1<<15) extern unsigned long get_zero_page_fast(void); + +/* Pure 2^n version of get_order */ +extern __inline__ int get_order(unsigned long size) +{ + int order; + + size = (size-1) >> (PAGE_SHIFT-1); + order = -1; + do { + size >>= 1; + order++; + } while (size); + return order; +} + #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ #endif /* _PPC_PAGE_H */ |