76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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#ifndef _ASM_POWERPC_PGALLOC_H
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#define _ASM_POWERPC_PGALLOC_H
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#ifdef __KERNEL__
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#include <linux/mm.h>
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#ifdef CONFIG_PPC_BOOK3E
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extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
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#else /* CONFIG_PPC_BOOK3E */
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static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
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unsigned long address)
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{
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}
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#endif /* !CONFIG_PPC_BOOK3E */
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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free_page((unsigned long)pte);
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}
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static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
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{
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pgtable_page_dtor(ptepage);
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__free_page(ptepage);
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}
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typedef struct pgtable_free {
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unsigned long val;
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} pgtable_free_t;
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/* This needs to be big enough to allow for MMU_PAGE_COUNT + 2 to be stored
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* and small enough to fit in the low bits of any naturally aligned page
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* table cache entry. Arbitrarily set to 0x1f, that should give us some
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* room to grow
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*/
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#define PGF_CACHENUM_MASK 0x1f
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static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
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unsigned long mask)
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{
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BUG_ON(cachenum > PGF_CACHENUM_MASK);
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return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
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}
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#ifdef CONFIG_PPC64
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#include <asm/pgalloc-64.h>
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#else
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#include <asm/pgalloc-32.h>
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#endif
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#ifdef CONFIG_SMP
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extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
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extern void pte_free_finish(void);
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#else /* CONFIG_SMP */
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static inline void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf)
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{
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pgtable_free(pgf);
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}
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static inline void pte_free_finish(void) { }
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#endif /* !CONFIG_SMP */
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static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
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unsigned long address)
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{
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pgtable_free_t pgf = pgtable_free_cache(page_address(ptepage),
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PTE_NONCACHE_NUM,
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PTE_TABLE_SIZE-1);
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tlb_flush_pgtable(tlb, address);
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pgtable_page_dtor(ptepage);
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pgtable_free_tlb(tlb, pgf);
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}
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_PGALLOC_H */
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