mirror of https://gitee.com/openkylin/linux.git
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
#ifndef _ASM_M32R_PGALLOC_H
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#define _ASM_M32R_PGALLOC_H
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#include <linux/mm.h>
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#include <asm/io.h>
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#define pmd_populate_kernel(mm, pmd, pte) \
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set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
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static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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pgtable_t pte)
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{
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set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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/*
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* Allocate and free page tables.
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*/
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static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
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return pgd;
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}
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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free_page((unsigned long)pgd);
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}
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static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
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unsigned long address)
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{
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pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
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return pte;
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}
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static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
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unsigned long address)
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{
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struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
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if (!pte)
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return NULL;
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if (!pgtable_page_ctor(pte)) {
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__free_page(pte);
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return NULL;
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}
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return pte;
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}
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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 pte)
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{
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pgtable_page_dtor(pte);
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__free_page(pte);
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}
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#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, (pte))
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/*
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* allocating and freeing a pmd is trivial: the 1-entry pmd is
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* inside the pgd, so has no extra memory associated with it.
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* (In the PAE case we free the pmds as part of the pgd.)
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*/
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#define pmd_alloc_one(mm, addr) ({ 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, addr) do { } while (0)
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#define pgd_populate(mm, pmd, pte) BUG()
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#define check_pgt_cache() do { } while (0)
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#endif /* _ASM_M32R_PGALLOC_H */
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