Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle |
| 7 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
| 8 | */ |
| 9 | #ifndef _ASM_PAGE_H |
| 10 | #define _ASM_PAGE_H |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <spaces.h> |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | /* |
| 15 | * PAGE_SHIFT determines the page size |
| 16 | */ |
| 17 | #ifdef CONFIG_PAGE_SIZE_4KB |
| 18 | #define PAGE_SHIFT 12 |
| 19 | #endif |
| 20 | #ifdef CONFIG_PAGE_SIZE_8KB |
| 21 | #define PAGE_SHIFT 13 |
| 22 | #endif |
| 23 | #ifdef CONFIG_PAGE_SIZE_16KB |
| 24 | #define PAGE_SHIFT 14 |
| 25 | #endif |
| 26 | #ifdef CONFIG_PAGE_SIZE_64KB |
| 27 | #define PAGE_SHIFT 16 |
| 28 | #endif |
| 29 | #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| 30 | #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #ifndef __ASSEMBLY__ |
| 33 | |
Franck Bui-Huu | 41b0483 | 2007-06-04 17:46:34 +0200 | [diff] [blame] | 34 | #include <linux/pfn.h> |
Franck Bui-Huu | b1c65b3 | 2007-06-04 17:46:35 +0200 | [diff] [blame] | 35 | #include <asm/io.h> |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 36 | |
Dmitri Vorobiev | c29d150 | 2008-07-15 19:57:32 +0300 | [diff] [blame] | 37 | extern void build_clear_page(void); |
| 38 | extern void build_copy_page(void); |
| 39 | |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 40 | /* |
| 41 | * It's normally defined only for FLATMEM config but it's |
| 42 | * used in our early mem init code for all memory models. |
| 43 | * So always define it. |
| 44 | */ |
| 45 | #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | extern void clear_page(void * page); |
| 48 | extern void copy_page(void * to, void * from); |
| 49 | |
| 50 | extern unsigned long shm_align_mask; |
| 51 | |
| 52 | static inline unsigned long pages_do_alias(unsigned long addr1, |
| 53 | unsigned long addr2) |
| 54 | { |
| 55 | return (addr1 ^ addr2) & shm_align_mask; |
| 56 | } |
| 57 | |
| 58 | struct page; |
| 59 | |
| 60 | static inline void clear_user_page(void *addr, unsigned long vaddr, |
| 61 | struct page *page) |
| 62 | { |
| 63 | extern void (*flush_data_cache_page)(unsigned long addr); |
| 64 | |
| 65 | clear_page(addr); |
Ralf Baechle | 585fa72 | 2006-08-12 16:40:08 +0100 | [diff] [blame] | 66 | if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | flush_data_cache_page((unsigned long)addr); |
| 68 | } |
| 69 | |
Atsushi Nemoto | bcd0228 | 2006-12-12 17:14:56 +0000 | [diff] [blame] | 70 | extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, |
| 71 | struct page *to); |
| 72 | struct vm_area_struct; |
| 73 | extern void copy_user_highpage(struct page *to, struct page *from, |
| 74 | unsigned long vaddr, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Atsushi Nemoto | bcd0228 | 2006-12-12 17:14:56 +0000 | [diff] [blame] | 76 | #define __HAVE_ARCH_COPY_USER_HIGHPAGE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * These are used to make use of C type-checking.. |
| 80 | */ |
| 81 | #ifdef CONFIG_64BIT_PHYS_ADDR |
Ralf Baechle | ec917c2 | 2005-10-07 16:58:15 +0100 | [diff] [blame] | 82 | #ifdef CONFIG_CPU_MIPS32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | typedef struct { unsigned long pte_low, pte_high; } pte_t; |
| 84 | #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) |
Ralf Baechle | d34555f | 2006-08-31 19:39:09 +0100 | [diff] [blame] | 85 | #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | #else |
| 87 | typedef struct { unsigned long long pte; } pte_t; |
| 88 | #define pte_val(x) ((x).pte) |
Ralf Baechle | d34555f | 2006-08-31 19:39:09 +0100 | [diff] [blame] | 89 | #define __pte(x) ((pte_t) { (x) } ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | #endif |
| 91 | #else |
| 92 | typedef struct { unsigned long pte; } pte_t; |
| 93 | #define pte_val(x) ((x).pte) |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 94 | #define __pte(x) ((pte_t) { (x) } ) |
Ralf Baechle | d34555f | 2006-08-31 19:39:09 +0100 | [diff] [blame] | 95 | #endif |
Martin Schwidefsky | 2f569af | 2008-02-08 04:22:04 -0800 | [diff] [blame] | 96 | typedef struct page *pgtable_t; |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 97 | |
| 98 | /* |
| 99 | * For 3-level pagetables we defines these ourselves, for 2-level the |
| 100 | * definitions are supplied by <asm-generic/pgtable-nopmd.h>. |
| 101 | */ |
| 102 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | typedef struct { unsigned long pmd; } pmd_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | #define pmd_val(x) ((x).pmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #define __pmd(x) ((pmd_t) { (x) } ) |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 107 | |
| 108 | #endif |
| 109 | |
| 110 | /* |
| 111 | * Right now we don't support 4-level pagetables, so all pud-related |
| 112 | * definitions come from <asm-generic/pgtable-nopud.h>. |
| 113 | */ |
| 114 | |
| 115 | /* |
| 116 | * Finall the top of the hierarchy, the pgd |
| 117 | */ |
| 118 | typedef struct { unsigned long pgd; } pgd_t; |
| 119 | #define pgd_val(x) ((x).pgd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | #define __pgd(x) ((pgd_t) { (x) } ) |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * Manipulate page protection bits |
| 124 | */ |
| 125 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 126 | #define pgprot_val(x) ((x).pgprot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 128 | |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 129 | /* |
| 130 | * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd |
| 131 | * pair of pages we only have a single global bit per pair of pages. When |
| 132 | * writing to the TLB make sure we always have the bit set for both pages |
| 133 | * or none. This macro is used to access the `buddy' of the pte we're just |
| 134 | * working on. |
| 135 | */ |
| 136 | #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | #endif /* !__ASSEMBLY__ */ |
| 139 | |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 140 | /* |
| 141 | * __pa()/__va() should be used only during mem init. |
| 142 | */ |
Ralf Baechle | f4fae82 | 2007-10-11 23:46:12 +0100 | [diff] [blame] | 143 | #ifdef CONFIG_64BIT |
Franck Bui-Huu | b1c65b3 | 2007-06-04 17:46:35 +0200 | [diff] [blame] | 144 | #define __pa(x) \ |
| 145 | ({ \ |
| 146 | unsigned long __x = (unsigned long)(x); \ |
| 147 | __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \ |
| 148 | }) |
Franck Bui-Huu | 620a480 | 2006-10-19 13:20:00 +0200 | [diff] [blame] | 149 | #else |
Franck Bui-Huu | b1c65b3 | 2007-06-04 17:46:35 +0200 | [diff] [blame] | 150 | #define __pa(x) \ |
| 151 | ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) |
Franck Bui-Huu | 620a480 | 2006-10-19 13:20:00 +0200 | [diff] [blame] | 152 | #endif |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 153 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 154 | #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
| 157 | |
Ralf Baechle | e53639d | 2006-06-12 09:13:56 +0100 | [diff] [blame] | 158 | #ifdef CONFIG_FLATMEM |
| 159 | |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 160 | #define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr) |
Ralf Baechle | e53639d | 2006-06-12 09:13:56 +0100 | [diff] [blame] | 161 | |
Atsushi Nemoto | 7de58fa | 2006-07-05 01:22:44 +0900 | [diff] [blame] | 162 | #elif defined(CONFIG_SPARSEMEM) |
| 163 | |
| 164 | /* pfn_valid is defined in linux/mmzone.h */ |
| 165 | |
Ralf Baechle | e53639d | 2006-06-12 09:13:56 +0100 | [diff] [blame] | 166 | #elif defined(CONFIG_NEED_MULTIPLE_NODES) |
| 167 | |
| 168 | #define pfn_valid(pfn) \ |
| 169 | ({ \ |
| 170 | unsigned long __pfn = (pfn); \ |
| 171 | int __n = pfn_to_nid(__pfn); \ |
| 172 | ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \ |
| 173 | NODE_DATA(__n)->node_spanned_pages) \ |
| 174 | : 0); \ |
| 175 | }) |
| 176 | |
Ralf Baechle | e53639d | 2006-06-12 09:13:56 +0100 | [diff] [blame] | 177 | #endif |
| 178 | |
Franck Bui-Huu | 99e3b94 | 2006-10-19 13:19:59 +0200 | [diff] [blame] | 179 | #define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys(kaddr))) |
| 180 | #define virt_addr_valid(kaddr) pfn_valid(PFN_DOWN(virt_to_phys(kaddr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
| 182 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| 183 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 184 | |
| 185 | #define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE) |
| 186 | #define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET) |
| 187 | |
KAMEZAWA Hiroyuki | a02036e | 2006-03-27 01:15:43 -0800 | [diff] [blame] | 188 | #include <asm-generic/memory_model.h> |
Stephen Rothwell | fd4fd5a | 2005-09-03 15:54:30 -0700 | [diff] [blame] | 189 | #include <asm-generic/page.h> |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | #endif /* _ASM_PAGE_H */ |