83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
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#ifndef _METAG_PGALLOC_H
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#define _METAG_PGALLOC_H
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#include <linux/threads.h>
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#include <linux/mm.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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#define pmd_populate(mm, pmd, pte) \
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set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte)))
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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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#ifdef CONFIG_METAG_META21_MMU
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static inline void pgd_ctor(pgd_t *pgd)
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{
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memcpy(pgd + USER_PTRS_PER_PGD,
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swapper_pg_dir + USER_PTRS_PER_PGD,
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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}
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#else
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#define pgd_ctor(x) do { } while (0)
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#endif
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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_zeroed_page(GFP_KERNEL);
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if (pgd)
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pgd_ctor(pgd);
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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;
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pte = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
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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) \
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do { \
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pgtable_page_dtor(pte); \
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tlb_remove_page((tlb), (pte)); \
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} while (0)
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#define check_pgt_cache() do { } while (0)
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#endif
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