projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * include/asm-s390/pgalloc.h | |
| 3 | * | |
| 4 | * S390 version | |
| 5 | * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation | |
| 6 | * Author(s): Hartmut Penner (hp@de.ibm.com) | |
| 7 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
| 8 | * | |
| 9 | * Derived from "include/asm-i386/pgalloc.h" | |
| 10 | * Copyright (C) 1994 Linus Torvalds | |
| 11 | */ | |
| 12 | ||
| 13 | #ifndef _S390_PGALLOC_H | |
| 14 | #define _S390_PGALLOC_H | |
| 15 | ||
| 1da177e4 LT |
16 | #include <linux/threads.h> |
| 17 | #include <linux/gfp.h> | |
| 18 | #include <linux/mm.h> | |
| 19 | ||
| 20 | #define check_pgt_cache() do {} while (0) | |
| 21 | ||
| 22 | extern void diag10(unsigned long addr); | |
| 23 | ||
| 9282ed92 GS |
24 | /* |
| 25 | * Page allocation orders. | |
| 26 | */ | |
| 27 | #ifndef __s390x__ | |
| f4eb07c1 HC |
28 | # define PTE_ALLOC_ORDER 0 |
| 29 | # define PMD_ALLOC_ORDER 0 | |
| 9282ed92 GS |
30 | # define PGD_ALLOC_ORDER 1 |
| 31 | #else /* __s390x__ */ | |
| f4eb07c1 | 32 | # define PTE_ALLOC_ORDER 0 |
| 9282ed92 GS |
33 | # define PMD_ALLOC_ORDER 2 |
| 34 | # define PGD_ALLOC_ORDER 2 | |
| 35 | #endif /* __s390x__ */ | |
| 36 | ||
| 1da177e4 LT |
37 | /* |
| 38 | * Allocate and free page tables. The xxx_kernel() versions are | |
| 39 | * used to allocate a kernel page table - this turns on ASN bits | |
| 40 | * if any. | |
| 41 | */ | |
| 42 | ||
| 43 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 44 | { | |
| 9282ed92 | 45 | pgd_t *pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ALLOC_ORDER); |
| 1da177e4 LT |
46 | int i; |
| 47 | ||
| 9282ed92 GS |
48 | if (!pgd) |
| 49 | return NULL; | |
| 50 | for (i = 0; i < PTRS_PER_PGD; i++) | |
| 1da177e4 | 51 | #ifndef __s390x__ |
| 9282ed92 GS |
52 | pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE)); |
| 53 | #else | |
| 54 | pgd_clear(pgd + i); | |
| 55 | #endif | |
| 1da177e4 LT |
56 | return pgd; |
| 57 | } | |
| 58 | ||
| 59 | static inline void pgd_free(pgd_t *pgd) | |
| 60 | { | |
| 9282ed92 | 61 | free_pages((unsigned long) pgd, PGD_ALLOC_ORDER); |
| 1da177e4 LT |
62 | } |
| 63 | ||
| 64 | #ifndef __s390x__ | |
| 65 | /* | |
| 66 | * page middle directory allocation/free routines. | |
| 67 | * We use pmd cache only on s390x, so these are dummy routines. This | |
| 68 | * code never triggers because the pgd will always be present. | |
| 69 | */ | |
| 70 | #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) | |
| 71 | #define pmd_free(x) do { } while (0) | |
| 72 | #define __pmd_free_tlb(tlb,x) do { } while (0) | |
| 73 | #define pgd_populate(mm, pmd, pte) BUG() | |
| 74 | #else /* __s390x__ */ | |
| 75 | static inline pmd_t * pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr) | |
| 76 | { | |
| 9282ed92 GS |
77 | pmd_t *pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ALLOC_ORDER); |
| 78 | int i; | |
| 1da177e4 | 79 | |
| 9282ed92 GS |
80 | if (!pmd) |
| 81 | return NULL; | |
| 82 | for (i=0; i < PTRS_PER_PMD; i++) | |
| 83 | pmd_clear(pmd + i); | |
| 1da177e4 LT |
84 | return pmd; |
| 85 | } | |
| 86 | ||
| 87 | static inline void pmd_free (pmd_t *pmd) | |
| 88 | { | |
| 9282ed92 | 89 | free_pages((unsigned long) pmd, PMD_ALLOC_ORDER); |
| 1da177e4 LT |
90 | } |
| 91 | ||
| 92 | #define __pmd_free_tlb(tlb,pmd) \ | |
| 93 | do { \ | |
| 94 | tlb_flush_mmu(tlb, 0, 0); \ | |
| 95 | pmd_free(pmd); \ | |
| 96 | } while (0) | |
| 97 | ||
| 98 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) | |
| 99 | { | |
| 100 | pgd_val(*pgd) = _PGD_ENTRY | __pa(pmd); | |
| 101 | } | |
| 102 | ||
| 103 | #endif /* __s390x__ */ | |
| 104 | ||
| 105 | static inline void | |
| 106 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) | |
| 107 | { | |
| 108 | #ifndef __s390x__ | |
| 109 | pmd_val(pmd[0]) = _PAGE_TABLE + __pa(pte); | |
| 110 | pmd_val(pmd[1]) = _PAGE_TABLE + __pa(pte+256); | |
| 111 | pmd_val(pmd[2]) = _PAGE_TABLE + __pa(pte+512); | |
| 112 | pmd_val(pmd[3]) = _PAGE_TABLE + __pa(pte+768); | |
| 113 | #else /* __s390x__ */ | |
| 114 | pmd_val(*pmd) = _PMD_ENTRY + __pa(pte); | |
| 115 | pmd_val1(*pmd) = _PMD_ENTRY + __pa(pte+256); | |
| 116 | #endif /* __s390x__ */ | |
| 117 | } | |
| 118 | ||
| 119 | static inline void | |
| 120 | pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page) | |
| 121 | { | |
| 0b2b6e1d | 122 | pmd_populate_kernel(mm, pmd, (pte_t *)page_to_phys(page)); |
| 1da177e4 LT |
123 | } |
| 124 | ||
| 125 | /* | |
| 126 | * page table entry allocation/free routines. | |
| 127 | */ | |
| 128 | static inline pte_t * | |
| 129 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long vmaddr) | |
| 130 | { | |
| 9282ed92 GS |
131 | pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT); |
| 132 | int i; | |
| 133 | ||
| 134 | if (!pte) | |
| 135 | return NULL; | |
| 136 | for (i=0; i < PTRS_PER_PTE; i++) { | |
| 137 | pte_clear(mm, vmaddr, pte + i); | |
| 138 | vmaddr += PAGE_SIZE; | |
| 1da177e4 LT |
139 | } |
| 140 | return pte; | |
| 141 | } | |
| 142 | ||
| 143 | static inline struct page * | |
| 144 | pte_alloc_one(struct mm_struct *mm, unsigned long vmaddr) | |
| 145 | { | |
| 146 | pte_t *pte = pte_alloc_one_kernel(mm, vmaddr); | |
| 147 | if (pte) | |
| 148 | return virt_to_page(pte); | |
| d2c993d8 | 149 | return NULL; |
| 1da177e4 LT |
150 | } |
| 151 | ||
| 152 | static inline void pte_free_kernel(pte_t *pte) | |
| 153 | { | |
| 154 | free_page((unsigned long) pte); | |
| 155 | } | |
| 156 | ||
| 157 | static inline void pte_free(struct page *pte) | |
| 158 | { | |
| 159 | __free_page(pte); | |
| 160 | } | |
| 161 | ||
| 162 | #define __pte_free_tlb(tlb,pte) tlb_remove_page(tlb,pte) | |
| 163 | ||
| 1da177e4 | 164 | #endif /* _S390_PGALLOC_H */ |