arch/powerpc/include/asm/pgalloc.h

   1 #ifndef _ASM_POWERPC_PGALLOC_H
   2 #define _ASM_POWERPC_PGALLOC_H
   3 #ifdef __KERNEL__
   4
   5 #include <linux/mm.h>
   6
   7 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
   8 {
   9         free_page((unsigned long)pte);
  10 }
  11
  12 static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
  13 {
  14         pgtable_page_dtor(ptepage);
  15         __free_page(ptepage);
  16 }
  17
  18 typedef struct pgtable_free {
  19         unsigned long val;
  20 } pgtable_free_t;
  21
  22 #define PGF_CACHENUM_MASK       0x7
  23
  24 static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
  25                                                 unsigned long mask)
  26 {
  27         BUG_ON(cachenum > PGF_CACHENUM_MASK);
  28
  29         return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
  30 }
  31
  32 #ifdef CONFIG_PPC64
  33 #include <asm/pgalloc-64.h>
  34 #else
  35 #include <asm/pgalloc-32.h>
  36 #endif
  37
  38 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
  39
  40 #ifdef CONFIG_SMP
  41 #define __pte_free_tlb(tlb,ptepage)     \
  42 do { \
  43         pgtable_page_dtor(ptepage); \
  44         pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
  45                 PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
  46 } while (0)
  47 #else
  48 #define __pte_free_tlb(tlb, pte)        pte_free((tlb)->mm, (pte))
  49 #endif
  50
  51
  52 #endif /* __KERNEL__ */
  53 #endif /* _ASM_POWERPC_PGALLOC_H */