93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ALPHA_PGALLOC_H
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#define _ALPHA_PGALLOC_H
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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/*
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* Allocate and free page tables. The xxx_kernel() versions are
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* used to allocate a kernel page table - this turns on ASN bits
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* if any.
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*/
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static inline void
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pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
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{
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pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline void
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pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
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{
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pmd_set(pmd, pte);
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}
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static inline void
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pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
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{
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pgd_set(pgd, pmd);
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}
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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static inline void
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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 pmd_t *
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pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
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return ret;
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}
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static inline void
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pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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free_page((unsigned long)pmd);
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}
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static inline pte_t *
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pte_alloc_one_kernel(struct mm_struct *mm, 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 void
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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 pgtable_t
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pte_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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pte_t *pte = pte_alloc_one_kernel(mm, address);
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struct page *page;
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if (!pte)
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return NULL;
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page = virt_to_page(pte);
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if (!pgtable_page_ctor(page)) {
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__free_page(page);
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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
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pte_free(struct mm_struct *mm, pgtable_t page)
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{
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pgtable_page_dtor(page);
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__free_page(page);
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}
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#define check_pgt_cache() do { } while (0)
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#endif /* _ALPHA_PGALLOC_H */
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