1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * include/asm-xtensa/pgalloc.h
5 * Copyright (C) 2001-2007 Tensilica Inc.
8 #ifndef _XTENSA_PGALLOC_H
9 #define _XTENSA_PGALLOC_H
11 #include <linux/highmem.h>
12 #include <linux/slab.h>
15 * Allocating and freeing a pmd is trivial: the 1-entry pmd is
16 * inside the pgd, so has no extra memory associated with it.
19 #define pmd_populate_kernel(mm, pmdp, ptep) \
20 (pmd_val(*(pmdp)) = ((unsigned long)ptep))
21 #define pmd_populate(mm, pmdp, page) \
22 (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
23 #define pmd_pgtable(pmd) pmd_page(pmd)
26 pgd_alloc(struct mm_struct *mm)
28 return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
31 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
33 free_page((unsigned long)pgd);
36 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
41 ptep = (pte_t *)__get_free_page(GFP_KERNEL);
44 for (i = 0; i < 1024; i++)
45 pte_clear(NULL, 0, ptep + i);
49 static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
54 pte = pte_alloc_one_kernel(mm);
57 page = virt_to_page(pte);
58 if (!pgtable_pte_page_ctor(page)) {
65 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
67 free_page((unsigned long)pte);
70 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
72 pgtable_pte_page_dtor(pte);
75 #define pmd_pgtable(pmd) pmd_page(pmd)
77 #endif /* _XTENSA_PGALLOC_H */