include/asm-ppc/pgalloc.h

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