projects / mirror_ubuntu-kernels.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 | ||
| 24 | /* | |
| 25 | * Allocate and free page tables. The xxx_kernel() versions are | |
| 26 | * used to allocate a kernel page table - this turns on ASN bits | |
| 27 | * if any. | |
| 28 | */ | |
| 29 | ||
| 30 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 31 | { | |
| 32 | pgd_t *pgd; | |
| 33 | int i; | |
| 34 | ||
| 35 | #ifndef __s390x__ | |
| 36 | pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,1); | |
| 37 | if (pgd != NULL) | |
| 38 | for (i = 0; i < USER_PTRS_PER_PGD; i++) | |
| 39 | pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE)); | |
| 40 | #else /* __s390x__ */ | |
| 41 | pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,2); | |
| 42 | if (pgd != NULL) | |
| 43 | for (i = 0; i < PTRS_PER_PGD; i++) | |
| 44 | pgd_clear(pgd + i); | |
| 45 | #endif /* __s390x__ */ | |
| 46 | return pgd; | |
| 47 | } | |
| 48 | ||
| 49 | static inline void pgd_free(pgd_t *pgd) | |
| 50 | { | |
| 51 | #ifndef __s390x__ | |
| 52 | free_pages((unsigned long) pgd, 1); | |
| 53 | #else /* __s390x__ */ | |
| 54 | free_pages((unsigned long) pgd, 2); | |
| 55 | #endif /* __s390x__ */ | |
| 56 | } | |
| 57 | ||
| 58 | #ifndef __s390x__ | |
| 59 | /* | |
| 60 | * page middle directory allocation/free routines. | |
| 61 | * We use pmd cache only on s390x, so these are dummy routines. This | |
| 62 | * code never triggers because the pgd will always be present. | |
| 63 | */ | |
| 64 | #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) | |
| 65 | #define pmd_free(x) do { } while (0) | |
| 66 | #define __pmd_free_tlb(tlb,x) do { } while (0) | |
| 67 | #define pgd_populate(mm, pmd, pte) BUG() | |
| 68 | #else /* __s390x__ */ | |
| 69 | static inline pmd_t * pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr) | |
| 70 | { | |
| 71 | pmd_t *pmd; | |
| 72 | int i; | |
| 73 | ||
| 74 | pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, 2); | |
| 75 | if (pmd != NULL) { | |
| 76 | for (i=0; i < PTRS_PER_PMD; i++) | |
| 77 | pmd_clear(pmd+i); | |
| 78 | } | |
| 79 | return pmd; | |
| 80 | } | |
| 81 | ||
| 82 | static inline void pmd_free (pmd_t *pmd) | |
| 83 | { | |
| 84 | free_pages((unsigned long) pmd, 2); | |
| 85 | } | |
| 86 | ||
| 87 | #define __pmd_free_tlb(tlb,pmd) \ | |
| 88 | do { \ | |
| 89 | tlb_flush_mmu(tlb, 0, 0); \ | |
| 90 | pmd_free(pmd); \ | |
| 91 | } while (0) | |
| 92 | ||
| 93 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) | |
| 94 | { | |
| 95 | pgd_val(*pgd) = _PGD_ENTRY | __pa(pmd); | |
| 96 | } | |
| 97 | ||
| 98 | #endif /* __s390x__ */ | |
| 99 | ||
| 100 | static inline void | |
| 101 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) | |
| 102 | { | |
| 103 | #ifndef __s390x__ | |
| 104 | pmd_val(pmd[0]) = _PAGE_TABLE + __pa(pte); | |
| 105 | pmd_val(pmd[1]) = _PAGE_TABLE + __pa(pte+256); | |
| 106 | pmd_val(pmd[2]) = _PAGE_TABLE + __pa(pte+512); | |
| 107 | pmd_val(pmd[3]) = _PAGE_TABLE + __pa(pte+768); | |
| 108 | #else /* __s390x__ */ | |
| 109 | pmd_val(*pmd) = _PMD_ENTRY + __pa(pte); | |
| 110 | pmd_val1(*pmd) = _PMD_ENTRY + __pa(pte+256); | |
| 111 | #endif /* __s390x__ */ | |
| 112 | } | |
| 113 | ||
| 114 | static inline void | |
| 115 | pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page) | |
| 116 | { | |
| 117 | pmd_populate_kernel(mm, pmd, (pte_t *)((page-mem_map) << PAGE_SHIFT)); | |
| 118 | } | |
| 119 | ||
| 120 | /* | |
| 121 | * page table entry allocation/free routines. | |
| 122 | */ | |
| 123 | static inline pte_t * | |
| 124 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long vmaddr) | |
| 125 | { | |
| 126 | pte_t *pte; | |
| 127 | int i; | |
| 128 | ||
| 129 | pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT); | |
| 130 | if (pte != NULL) { | |
| 131 | for (i=0; i < PTRS_PER_PTE; i++) { | |
| 132 | pte_clear(mm, vmaddr, pte+i); | |
| 133 | vmaddr += PAGE_SIZE; | |
| 134 | } | |
| 135 | } | |
| 136 | return pte; | |
| 137 | } | |
| 138 | ||
| 139 | static inline struct page * | |
| 140 | pte_alloc_one(struct mm_struct *mm, unsigned long vmaddr) | |
| 141 | { | |
| 142 | pte_t *pte = pte_alloc_one_kernel(mm, vmaddr); | |
| 143 | if (pte) | |
| 144 | return virt_to_page(pte); | |
| d2c993d8 | 145 | return NULL; |
| 1da177e4 LT |
146 | } |
| 147 | ||
| 148 | static inline void pte_free_kernel(pte_t *pte) | |
| 149 | { | |
| 150 | free_page((unsigned long) pte); | |
| 151 | } | |
| 152 | ||
| 153 | static inline void pte_free(struct page *pte) | |
| 154 | { | |
| 155 | __free_page(pte); | |
| 156 | } | |
| 157 | ||
| 158 | #define __pte_free_tlb(tlb,pte) tlb_remove_page(tlb,pte) | |
| 159 | ||
| 1da177e4 | 160 | #endif /* _S390_PGALLOC_H */ |