68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* include/asm-xtensa/pgalloc.h
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*
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* Copyright (C) 2001-2007 Tensilica Inc.
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*/
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#ifndef _XTENSA_PGALLOC_H
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#define _XTENSA_PGALLOC_H
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#ifdef CONFIG_MMU
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#include <linux/highmem.h>
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#include <linux/slab.h>
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#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
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#define __HAVE_ARCH_PTE_ALLOC_ONE
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#include <asm-generic/pgalloc.h>
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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_populate_kernel(mm, pmdp, ptep) \
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(pmd_val(*(pmdp)) = ((unsigned long)ptep))
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#define pmd_populate(mm, pmdp, page) \
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(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
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static inline pgd_t*
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pgd_alloc(struct mm_struct *mm)
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{
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return (pgd_t*) __get_free_page(GFP_KERNEL | __GFP_ZERO);
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}
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static inline void ptes_clear(pte_t *ptep)
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{
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int i;
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for (i = 0; i < PTRS_PER_PTE; i++)
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pte_clear(NULL, 0, ptep + i);
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}
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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pte_t *ptep;
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ptep = (pte_t *)__pte_alloc_one_kernel(mm);
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if (!ptep)
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return NULL;
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ptes_clear(ptep);
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return ptep;
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}
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static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
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{
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struct page *page;
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page = __pte_alloc_one(mm, GFP_PGTABLE_USER);
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if (!page)
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return NULL;
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ptes_clear(page_address(page));
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return page;
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}
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#endif /* CONFIG_MMU */
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#endif /* _XTENSA_PGALLOC_H */
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