linux/arch/powerpc/include/asm/page_32.h
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   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_KMALLOC_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
  34typedef unsigned long long pte_basic_t;
  35#else
  36typedef unsigned long pte_basic_t;
  37#endif
  38
  39struct page;
  40extern void clear_pages(void *page, int order);
  41static inline void clear_page(void *page) { clear_pages(page, 0); }
  42extern void copy_page(void *to, void *from);
  43
  44#include <asm-generic/page.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 */
  52