LXR linux/arch/powerpc/include/asm/pgalloc-32.h

   1#ifndef _ASM_POWERPC_PGALLOC_32_H
   2#define _ASM_POWERPC_PGALLOC_32_H
   3
   4#include <linux/threads.h>
   5
   6#define PTE_NONCACHE_NUM        0  /* dummy for now to share code w/ppc64 */
   7
   8extern void __bad_pte(pmd_t *pmd);
   9
  10extern pgd_t *pgd_alloc(struct mm_struct *mm);
  11extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  12
  13/*
  14 * We don't have any real pmd's, and this code never triggers because
  15 * the pgd will always be present..
  16 */
  17/* #define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); }) */
  18#define pmd_free(mm, x)                 do { } while (0)
  19#define __pmd_free_tlb(tlb,x)           do { } while (0)
  20/* #define pgd_populate(mm, pmd, pte)      BUG() */
  21
  22#ifndef CONFIG_BOOKE
  23#define pmd_populate_kernel(mm, pmd, pte)       \
  24                (pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
  25#define pmd_populate(mm, pmd, pte)      \
  26                (pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
  27#define pmd_pgtable(pmd) pmd_page(pmd)
  28#else
  29#define pmd_populate_kernel(mm, pmd, pte)       \
  30                (pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
  31#define pmd_populate(mm, pmd, pte)      \
  32                (pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
  33#define pmd_pgtable(pmd) pmd_page(pmd)
  34#endif
  35
  36extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
  37extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
  38
  39static inline void pgtable_free(pgtable_free_t pgf)
  40{
  41        void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
  42
  43        free_page((unsigned long)p);
  44}
  45
  46#define check_pgt_cache()       do { } while (0)
  47
  48#endif /* _ASM_POWERPC_PGALLOC_32_H */
  49