mirror of https://gitee.com/openkylin/linux.git
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
#ifndef _ASM_POWERPC_BOOK3S_32_PGALLOC_H
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#define _ASM_POWERPC_BOOK3S_32_PGALLOC_H
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#include <linux/threads.h>
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/* For 32-bit, all levels of page tables are just drawn from get_free_page() */
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#define MAX_PGTABLE_INDEX_SIZE 0
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extern void __bad_pte(pmd_t *pmd);
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
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/*
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* We don't have any real pmd's, and this code never triggers because
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* the pgd will always be present..
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*/
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/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
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#define pmd_free(mm, x) do { } while (0)
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#define __pmd_free_tlb(tlb,x,a) do { } while (0)
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/* #define pgd_populate(mm, pmd, pte) BUG() */
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#ifndef CONFIG_BOOKE
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
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pte_t *pte)
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{
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*pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
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pgtable_t pte_page)
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{
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*pmdp = __pmd((page_to_pfn(pte_page) << PAGE_SHIFT) | _PMD_PRESENT);
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#else
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
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pte_t *pte)
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{
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*pmdp = __pmd((unsigned long)pte | _PMD_PRESENT);
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
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pgtable_t pte_page)
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{
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*pmdp = __pmd((unsigned long)lowmem_page_address(pte_page) | _PMD_PRESENT);
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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#endif
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
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extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
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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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static inline void pgtable_free(void *table, unsigned index_size)
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{
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BUG_ON(index_size); /* 32-bit doesn't use this */
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free_page((unsigned long)table);
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}
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#define check_pgt_cache() do { } while (0)
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#ifdef CONFIG_SMP
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static inline void pgtable_free_tlb(struct mmu_gather *tlb,
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void *table, int shift)
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{
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unsigned long pgf = (unsigned long)table;
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BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
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pgf |= shift;
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tlb_remove_table(tlb, (void *)pgf);
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}
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static inline void __tlb_remove_table(void *_table)
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{
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void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
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unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
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pgtable_free(table, shift);
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}
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#else
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static inline void pgtable_free_tlb(struct mmu_gather *tlb,
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void *table, int shift)
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{
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pgtable_free(table, shift);
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}
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#endif
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
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unsigned long address)
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{
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pgtable_page_dtor(table);
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pgtable_free_tlb(tlb, page_address(table), 0);
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}
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#endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */
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