projects / mirror_ubuntu-eoan-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 56372b0b G |
1 | /* |
| 2 | * linux/arch/unicore32/include/asm/pgalloc.h | |
| 3 | * | |
| 4 | * Code specific to PKUnity SoC and UniCore ISA | |
| 5 | * | |
| 6 | * Copyright (C) 2001-2010 GUAN Xue-tao | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | #ifndef __UNICORE_PGALLOC_H__ | |
| 13 | #define __UNICORE_PGALLOC_H__ | |
| 14 | ||
| 15 | #include <asm/pgtable-hwdef.h> | |
| 16 | #include <asm/processor.h> | |
| 17 | #include <asm/cacheflush.h> | |
| 18 | #include <asm/tlbflush.h> | |
| 19 | ||
| 20 | #define check_pgt_cache() do { } while (0) | |
| 21 | ||
| 22 | #define _PAGE_USER_TABLE (PMD_TYPE_TABLE | PMD_PRESENT) | |
| 23 | #define _PAGE_KERNEL_TABLE (PMD_TYPE_TABLE | PMD_PRESENT) | |
| 24 | ||
| 25 | extern pgd_t *get_pgd_slow(struct mm_struct *mm); | |
| 26 | extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd); | |
| 27 | ||
| 28 | #define pgd_alloc(mm) get_pgd_slow(mm) | |
| 29 | #define pgd_free(mm, pgd) free_pgd_slow(mm, pgd) | |
| 30 | ||
| a830627b | 31 | #define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) |
| 56372b0b G |
32 | |
| 33 | /* | |
| 34 | * Allocate one PTE table. | |
| 35 | */ | |
| 36 | static inline pte_t * | |
| 37 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) | |
| 38 | { | |
| 39 | pte_t *pte; | |
| 40 | ||
| 41 | pte = (pte_t *)__get_free_page(PGALLOC_GFP); | |
| 42 | if (pte) | |
| 43 | clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t)); | |
| 44 | ||
| 45 | return pte; | |
| 46 | } | |
| 47 | ||
| 48 | static inline pgtable_t | |
| 49 | pte_alloc_one(struct mm_struct *mm, unsigned long addr) | |
| 50 | { | |
| 51 | struct page *pte; | |
| 52 | ||
| 53 | pte = alloc_pages(PGALLOC_GFP, 0); | |
| e90bedbb KS |
54 | if (!pte) |
| 55 | return NULL; | |
| 56 | if (!PageHighMem(pte)) { | |
| 57 | void *page = page_address(pte); | |
| 58 | clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t)); | |
| 59 | } | |
| 60 | if (!pgtable_page_ctor(pte)) { | |
| 61 | __free_page(pte); | |
| 56372b0b G |
62 | } |
| 63 | ||
| 64 | return pte; | |
| 65 | } | |
| 66 | ||
| 67 | /* | |
| 68 | * Free one PTE table. | |
| 69 | */ | |
| 70 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
| 71 | { | |
| 72 | if (pte) | |
| 73 | free_page((unsigned long)pte); | |
| 74 | } | |
| 75 | ||
| 76 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) | |
| 77 | { | |
| 78 | pgtable_page_dtor(pte); | |
| 79 | __free_page(pte); | |
| 80 | } | |
| 81 | ||
| 82 | static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval) | |
| 83 | { | |
| 84 | set_pmd(pmdp, __pmd(pmdval)); | |
| 85 | flush_pmd_entry(pmdp); | |
| 86 | } | |
| 87 | ||
| 88 | /* | |
| 89 | * Populate the pmdp entry with a pointer to the pte. This pmd is part | |
| 90 | * of the mm address space. | |
| 91 | */ | |
| 92 | static inline void | |
| 93 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | |
| 94 | { | |
| 95 | unsigned long pte_ptr = (unsigned long)ptep; | |
| 96 | ||
| 97 | /* | |
| 98 | * The pmd must be loaded with the physical | |
| 99 | * address of the PTE table | |
| 100 | */ | |
| 101 | __pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE); | |
| 102 | } | |
| 103 | ||
| 104 | static inline void | |
| 105 | pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) | |
| 106 | { | |
| 107 | __pmd_populate(pmdp, | |
| 108 | page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE); | |
| 109 | } | |
| 110 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
| 111 | ||
| 112 | #endif |