release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/include/asm/page_32.h

   1 #ifndef _ASM_POWERPC_PAGE_32_H
   2 #define _ASM_POWERPC_PAGE_32_H
   3
   4 #if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
   5 #if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
   6 #error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
   7 #endif
   8 #endif
   9
  10 #define VM_DATA_DEFAULT_FLAGS   VM_DATA_DEFAULT_FLAGS32
  11
  12 #ifdef CONFIG_NOT_COHERENT_CACHE
  13 #define ARCH_DMA_MINALIGN       L1_CACHE_BYTES
  14 #endif
  15
  16 #ifdef CONFIG_PTE_64BIT
  17 #define PTE_FLAGS_OFFSET        4       /* offset of PTE flags, in bytes */
  18 #else
  19 #define PTE_FLAGS_OFFSET        0
  20 #endif
  21
  22 #ifdef CONFIG_PPC_256K_PAGES
  23 #define PTE_SHIFT       (PAGE_SHIFT - PTE_T_LOG2 - 2)   /* 1/4 of a page */
  24 #else
  25 #define PTE_SHIFT       (PAGE_SHIFT - PTE_T_LOG2)       /* full page */
  26 #endif
  27
  28 #ifndef __ASSEMBLY__
  29 /*
  30  * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
  31  * physical addressing.
  32  */
  33 #ifdef CONFIG_PTE_64BIT
  34 typedef unsigned long long pte_basic_t;
  35 #else
  36 typedef unsigned long pte_basic_t;
  37 #endif
  38
  39 struct page;
  40 extern void clear_pages(void *page, int order);
  41 static inline void clear_page(void *page) { clear_pages(page, 0); }
  42 extern void copy_page(void *to, void *from);
  43
  44 #include <asm-generic/getorder.h>
  45
  46 #define PGD_T_LOG2      (__builtin_ffs(sizeof(pgd_t)) - 1)
  47 #define PTE_T_LOG2      (__builtin_ffs(sizeof(pte_t)) - 1)
  48
  49 #endif /* __ASSEMBLY__ */
  50
  51 #endif /* _ASM_POWERPC_PAGE_32_H */