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 #ifdef CONFIG_PPC_BOOK3E
   8 extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
   9 #else /* CONFIG_PPC_BOOK3E */
  10 static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
  11                                      unsigned long address)
  12 {
  13 }
  14 #endif /* !CONFIG_PPC_BOOK3E */
  15
  16 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  17 {
  18         free_page((unsigned long)pte);
  19 }
  20
  21 static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
  22 {
  23         pgtable_page_dtor(ptepage);
  24         __free_page(ptepage);
  25 }
  26
  27 typedef struct pgtable_free {
  28         unsigned long val;
  29 } pgtable_free_t;
  30
  31 #define PGF_CACHENUM_MASK       0x7
  32
  33 static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
  34                                                 unsigned long mask)
  35 {
  36         BUG_ON(cachenum > PGF_CACHENUM_MASK);
  37
  38         return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
  39 }
  40
  41 #ifdef CONFIG_PPC64
  42 #include <asm/pgalloc-64.h>
  43 #else
  44 #include <asm/pgalloc-32.h>
  45 #endif
  46
  47 #ifdef CONFIG_SMP
  48 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
  49 extern void pte_free_finish(void);
  50 #else /* CONFIG_SMP */
  51 static inline void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf)
  52 {
  53         pgtable_free(pgf);
  54 }
  55 static inline void pte_free_finish(void) { }
  56 #endif /* !CONFIG_SMP */
  57
  58 static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
  59                                   unsigned long address)
  60 {
  61         pgtable_free_t pgf = pgtable_free_cache(page_address(ptepage),
  62                                                 PTE_NONCACHE_NUM,
  63                                                 PTE_TABLE_SIZE-1);
  64         tlb_flush_pgtable(tlb, address);
  65         pgtable_page_dtor(ptepage);
  66         pgtable_free_tlb(tlb, pgf);
  67 }
  68
  69 #endif /* __KERNEL__ */
  70 #endif /* _ASM_POWERPC_PGALLOC_H */