81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SH_PGALLOC_H
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#define __ASM_SH_PGALLOC_H
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#include <linux/quicklist.h>
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#include <asm/page.h>
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#define QUICK_PT 0 /* Other page table pages that are zero on free */
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extern pgd_t *pgd_alloc(struct mm_struct *);
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extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
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#if PAGETABLE_LEVELS > 2
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extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
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extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
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extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
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#endif
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
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pte_t *pte)
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{
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set_pmd(pmd, __pmd((unsigned long)pte));
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}
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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((unsigned long)page_address(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 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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return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
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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 *page;
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void *pg;
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pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
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if (!pg)
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return NULL;
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page = virt_to_page(pg);
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if (!pgtable_page_ctor(page)) {
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quicklist_free(QUICK_PT, NULL, pg);
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return NULL;
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}
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return page;
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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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quicklist_free(QUICK_PT, NULL, 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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quicklist_free_page(QUICK_PT, NULL, 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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static inline void check_pgt_cache(void)
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{
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quicklist_trim(QUICK_PT, NULL, 25, 16);
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}
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#endif /* __ASM_SH_PGALLOC_H */
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