LXR linux/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
   7static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
   8{
   9        free_page((unsigned long)pte);
  10}
  11
  12static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
  13{
  14        pgtable_page_dtor(ptepage);
  15        __free_page(ptepage);
  16}
  17
  18typedef struct pgtable_free {
  19        unsigned long val;
  20} pgtable_free_t;
  21
  22#define PGF_CACHENUM_MASK       0x7
  23
  24static 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
  38extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
  39
  40#ifdef CONFIG_SMP
  41#define __pte_free_tlb(tlb,ptepage)     \
  42do { \
  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 */
  54