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 #ifdef CONFIG_PPC64
  28 #include <asm/pgalloc-64.h>
  29 #else
  30 #include <asm/pgalloc-32.h>
  31 #endif
  32
  33 #ifdef CONFIG_SMP
  34 struct mmu_gather;
  35 extern void tlb_remove_table(struct mmu_gather *, void *);
  36
  37 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
  38 {
  39         unsigned long pgf = (unsigned long)table;
  40         BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
  41         pgf |= shift;
  42         tlb_remove_table(tlb, (void *)pgf);
  43 }
  44
  45 static inline void __tlb_remove_table(void *_table)
  46 {
  47         void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
  48         unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
  49
  50         pgtable_free(table, shift);
  51 }
  52 #else /* CONFIG_SMP */
  53 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, unsigned shift)
  54 {
  55         pgtable_free(table, shift);
  56 }
  57 #endif /* !CONFIG_SMP */
  58
  59 static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
  60                                   unsigned long address)
  61 {
  62         tlb_flush_pgtable(tlb, address);
  63         pgtable_page_dtor(ptepage);
  64         pgtable_free_tlb(tlb, page_address(ptepage), 0);
  65 }
  66
  67 #endif /* __KERNEL__ */
  68 #endif /* _ASM_POWERPC_PGALLOC_H */