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 /* For 32-bit, all levels of page tables are just drawn from get_free_page() */
   7 #define MAX_PGTABLE_INDEX_SIZE  0
   8
   9 extern void __bad_pte(pmd_t *pmd);
  10
  11 extern pgd_t *pgd_alloc(struct mm_struct *mm);
  12 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  13
  14 /*
  15  * We don't have any real pmd's, and this code never triggers because
  16  * the pgd will always be present..
  17  */
  18 /* #define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); }) */
  19 #define pmd_free(mm, x)                 do { } while (0)
  20 #define __pmd_free_tlb(tlb,x,a)         do { } while (0)
  21 /* #define pgd_populate(mm, pmd, pte)      BUG() */
  22
  23 #ifndef CONFIG_BOOKE
  24 #define pmd_populate_kernel(mm, pmd, pte)       \
  25                 (pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
  26 #define pmd_populate(mm, pmd, pte)      \
  27                 (pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
  28 #define pmd_pgtable(pmd) pmd_page(pmd)
  29 #else
  30 #define pmd_populate_kernel(mm, pmd, pte)       \
  31                 (pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
  32 #define pmd_populate(mm, pmd, pte)      \
  33                 (pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
  34 #define pmd_pgtable(pmd) pmd_page(pmd)
  35 #endif
  36
  37 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
  38 extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
  39
  40 static inline void pgtable_free(void *table, unsigned index_size)
  41 {
  42         BUG_ON(index_size); /* 32-bit doesn't use this */
  43         free_page((unsigned long)table);
  44 }
  45
  46 #define check_pgt_cache()       do { } while (0)
  47
  48 #endif /* _ASM_POWERPC_PGALLOC_32_H */