/* * Based on arch/arm/include/asm/pgalloc.h * * Copyright (C) 2000-2001 Russell King * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_PGALLOC_H #define __ASM_PGALLOC_H #include <asm/pgtable-hwdef.h> #include <asm/processor.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> #define check_pgt_cache() do { } while (0) #define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO) #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) #if CONFIG_PGTABLE_LEVELS > 2 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { return (pmd_t *)__get_free_page(PGALLOC_GFP); } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) { BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); free_page((unsigned long)pmd); } static inline void __pud_populate(pud_t *pud, phys_addr_t pmd, pudval_t prot) { set_pud(pud, __pud(pmd | prot)); } static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) { __pud_populate(pud, __pa(pmd), PMD_TYPE_TABLE); } #else static inline void __pud_populate(pud_t *pud, phys_addr_t pmd, pudval_t prot) { BUILD_BUG(); } #endif /* CONFIG_PGTABLE_LEVELS > 2 */ #if CONFIG_PGTABLE_LEVELS > 3 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) { return (pud_t *)__get_free_page(PGALLOC_GFP); } static inline void pud_free(struct mm_struct *mm, pud_t *pud) { BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); free_page((unsigned long)pud); } static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pud, pgdval_t prot) { set_pgd(pgdp, __pgd(pud | prot)); } static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) { __pgd_populate(pgd, __pa(pud), PUD_TYPE_TABLE); } #else static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pud, pgdval_t prot) { BUILD_BUG(); } #endif /* CONFIG_PGTABLE_LEVELS > 3 */ extern pgd_t *pgd_alloc(struct mm_struct *mm); extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); static inline pte_t * pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) { return (pte_t *)__get_free_page(PGALLOC_GFP); } static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr) { struct page *pte; pte = alloc_pages(PGALLOC_GFP, 0); if (!pte) return NULL; if (!pgtable_page_ctor(pte)) { __free_page(pte); return NULL; } return pte; } /* * Free a PTE table. */ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { if (pte) free_page((unsigned long)pte); } static inline void pte_free(struct mm_struct *mm, pgtable_t pte) { pgtable_page_dtor(pte); __free_page(pte); } static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte, pmdval_t prot) { set_pmd(pmdp, __pmd(pte | prot)); } /* * Populate the pmdp entry with a pointer to the pte. This pmd is part * of the mm address space. */ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) { /* * The pmd must be loaded with the physical address of the PTE table */ __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) { __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); } #define pmd_pgtable(pmd) pmd_page(pmd) #endif
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pgalloc.h | File | 3.71 KB | 0644 |
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pgtable-hwdef.h | File | 9.4 KB | 0644 |
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tlb.h | File | 2.22 KB | 0644 |
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tlbflush.h | File | 5.38 KB | 0644 |
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topology.h | File | 1.29 KB | 0644 |
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traps.h | File | 3.33 KB | 0644 |
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