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

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