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/* SPDX-License-Identifier: GPL-2.0-only */ /* * include/asm-xtensa/pgalloc.h * * Copyright (C) 2001-2007 Tensilica Inc. */ #ifndef _XTENSA_PGALLOC_H #define _XTENSA_PGALLOC_H #ifdef CONFIG_MMU #include <linux/highmem.h> #include <linux/slab.h> #define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL #define __HAVE_ARCH_PTE_ALLOC_ONE #include <asm-generic/pgalloc.h> /* * Allocating and freeing a pmd is trivial: the 1-entry pmd is * inside the pgd, so has no extra memory associated with it. */ #define pmd_populate_kernel(mm, pmdp, ptep) \ (pmd_val(*(pmdp)) = ((unsigned long)ptep)) #define pmd_populate(mm, pmdp, page) \ (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page))) static inline pgd_t* pgd_alloc(struct mm_struct *mm) { return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER); } static inline void ptes_clear(pte_t *ptep) { int i; for (i = 0; i < PTRS_PER_PTE; i++) pte_clear(NULL, 0, ptep + i); } static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) { pte_t *ptep; ptep = (pte_t *)__pte_alloc_one_kernel(mm); if (!ptep) return NULL; ptes_clear(ptep); return ptep; } static inline pgtable_t pte_alloc_one(struct mm_struct *mm) { struct page *page; page = __pte_alloc_one(mm, GFP_PGTABLE_USER); if (!page) return NULL; ptes_clear(page_address(page)); return page; } #endif /* CONFIG_MMU */ #endif /* _XTENSA_PGALLOC_H */