include/asm-ppc/pgalloc.h

   1 #ifdef __KERNEL__
   2 #ifndef _PPC_PGALLOC_H
   3 #define _PPC_PGALLOC_H
   4
   5 #include <linux/config.h>
   6 #include <linux/threads.h>
   7
   8 extern void __bad_pte(pmd_t *pmd);
   9
  10 extern pgd_t *pgd_alloc(struct mm_struct *mm);
  11 extern void pgd_free(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(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 #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 #endif
  33
  34 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
  35 extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
  36 extern void pte_free_kernel(pte_t *pte);
  37 extern void pte_free(struct page *pte);
  38
  39 #define __pte_free_tlb(tlb, pte)        pte_free((pte))
  40
  41 #define check_pgt_cache()       do { } while (0)
  42
  43 #endif /* _PPC_PGALLOC_H */
  44 #endif /* __KERNEL__ */