projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 56372b0b G |
2 | /* |
| 3 | * linux/arch/unicore32/include/asm/pgalloc.h | |
| 4 | * | |
| 5 | * Code specific to PKUnity SoC and UniCore ISA | |
| 6 | * | |
| 7 | * Copyright (C) 2001-2010 GUAN Xue-tao | |
| 56372b0b G |
8 | */ |
| 9 | #ifndef __UNICORE_PGALLOC_H__ | |
| 10 | #define __UNICORE_PGALLOC_H__ | |
| 11 | ||
| 12 | #include <asm/pgtable-hwdef.h> | |
| 13 | #include <asm/processor.h> | |
| 14 | #include <asm/cacheflush.h> | |
| 15 | #include <asm/tlbflush.h> | |
| 16 | ||
| 17 | #define check_pgt_cache() do { } while (0) | |
| 18 | ||
| 19 | #define _PAGE_USER_TABLE (PMD_TYPE_TABLE | PMD_PRESENT) | |
| 20 | #define _PAGE_KERNEL_TABLE (PMD_TYPE_TABLE | PMD_PRESENT) | |
| 21 | ||
| 22 | extern pgd_t *get_pgd_slow(struct mm_struct *mm); | |
| 23 | extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd); | |
| 24 | ||
| 25 | #define pgd_alloc(mm) get_pgd_slow(mm) | |
| 26 | #define pgd_free(mm, pgd) free_pgd_slow(mm, pgd) | |
| 27 | ||
| 75f296d9 | 28 | #define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO) |
| 56372b0b G |
29 | |
| 30 | /* | |
| 31 | * Allocate one PTE table. | |
| 32 | */ | |
| 33 | static inline pte_t * | |
| 4cf58924 | 34 | pte_alloc_one_kernel(struct mm_struct *mm) |
| 56372b0b G |
35 | { |
| 36 | pte_t *pte; | |
| 37 | ||
| 38 | pte = (pte_t *)__get_free_page(PGALLOC_GFP); | |
| 39 | if (pte) | |
| 40 | clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t)); | |
| 41 | ||
| 42 | return pte; | |
| 43 | } | |
| 44 | ||
| 45 | static inline pgtable_t | |
| 4cf58924 | 46 | pte_alloc_one(struct mm_struct *mm) |
| 56372b0b G |
47 | { |
| 48 | struct page *pte; | |
| 49 | ||
| 50 | pte = alloc_pages(PGALLOC_GFP, 0); | |
| e90bedbb KS |
51 | if (!pte) |
| 52 | return NULL; | |
| 53 | if (!PageHighMem(pte)) { | |
| 54 | void *page = page_address(pte); | |
| 55 | clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t)); | |
| 56 | } | |
| 57 | if (!pgtable_page_ctor(pte)) { | |
| 58 | __free_page(pte); | |
| 56372b0b G |
59 | } |
| 60 | ||
| 61 | return pte; | |
| 62 | } | |
| 63 | ||
| 64 | /* | |
| 65 | * Free one PTE table. | |
| 66 | */ | |
| 67 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
| 68 | { | |
| 69 | if (pte) | |
| 70 | free_page((unsigned long)pte); | |
| 71 | } | |
| 72 | ||
| 73 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) | |
| 74 | { | |
| 75 | pgtable_page_dtor(pte); | |
| 76 | __free_page(pte); | |
| 77 | } | |
| 78 | ||
| 79 | static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval) | |
| 80 | { | |
| 81 | set_pmd(pmdp, __pmd(pmdval)); | |
| 82 | flush_pmd_entry(pmdp); | |
| 83 | } | |
| 84 | ||
| 85 | /* | |
| 86 | * Populate the pmdp entry with a pointer to the pte. This pmd is part | |
| 87 | * of the mm address space. | |
| 88 | */ | |
| 89 | static inline void | |
| 90 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | |
| 91 | { | |
| 92 | unsigned long pte_ptr = (unsigned long)ptep; | |
| 93 | ||
| 94 | /* | |
| 95 | * The pmd must be loaded with the physical | |
| 96 | * address of the PTE table | |
| 97 | */ | |
| 98 | __pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE); | |
| 99 | } | |
| 100 | ||
| 101 | static inline void | |
| 102 | pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) | |
| 103 | { | |
| 104 | __pmd_populate(pmdp, | |
| 105 | page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE); | |
| 106 | } | |
| 107 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
| 108 | ||
| 109 | #endif |