89 строки
1.9 KiB
C
89 строки
1.9 KiB
C
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#ifndef __ASM_SH_PGALLOC_H
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#define __ASM_SH_PGALLOC_H
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#include <linux/threads.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#define pgd_quicklist ((unsigned long *)0)
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#define pmd_quicklist ((unsigned long *)0)
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#define pte_quicklist ((unsigned long *)0)
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#define pgtable_cache_size 0L
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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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struct page *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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/*
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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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unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
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pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
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if (pgd)
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memset(pgd, 0, pgd_size);
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return pgd;
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}
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static inline void pgd_free(pgd_t *pgd)
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{
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kfree(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;
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pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
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return pte;
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}
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static inline struct page *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;
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pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
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return pte;
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}
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static inline void pte_free_kernel(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 page *pte)
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{
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__free_page(pte);
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}
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#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(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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*/
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#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
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#define pmd_free(x) do { } while (0)
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#define __pmd_free_tlb(tlb,x) 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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#ifdef CONFIG_CPU_SH4
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#define PG_mapped PG_arch_1
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#endif
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#endif /* __ASM_SH_PGALLOC_H */
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