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 | |
| 12 | #include <linux/config.h> |
| 13 | |
| 14 | #ifdef __KERNEL__ |
| 15 | |
| 16 | #include <spaces.h> |
| 17 | |
| 18 | #endif |
| 19 | |
| 20 | /* |
| 21 | * PAGE_SHIFT determines the page size |
| 22 | */ |
| 23 | #ifdef CONFIG_PAGE_SIZE_4KB |
| 24 | #define PAGE_SHIFT 12 |
| 25 | #endif |
| 26 | #ifdef CONFIG_PAGE_SIZE_8KB |
| 27 | #define PAGE_SHIFT 13 |
| 28 | #endif |
| 29 | #ifdef CONFIG_PAGE_SIZE_16KB |
| 30 | #define PAGE_SHIFT 14 |
| 31 | #endif |
| 32 | #ifdef CONFIG_PAGE_SIZE_64KB |
| 33 | #define PAGE_SHIFT 16 |
| 34 | #endif |
| 35 | #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| 36 | #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) |
| 37 | |
| 38 | |
| 39 | #ifdef __KERNEL__ |
| 40 | #ifndef __ASSEMBLY__ |
| 41 | |
| 42 | extern void clear_page(void * page); |
| 43 | extern void copy_page(void * to, void * from); |
| 44 | |
| 45 | extern unsigned long shm_align_mask; |
| 46 | |
| 47 | static inline unsigned long pages_do_alias(unsigned long addr1, |
| 48 | unsigned long addr2) |
| 49 | { |
| 50 | return (addr1 ^ addr2) & shm_align_mask; |
| 51 | } |
| 52 | |
| 53 | struct page; |
| 54 | |
| 55 | static inline void clear_user_page(void *addr, unsigned long vaddr, |
| 56 | struct page *page) |
| 57 | { |
| 58 | extern void (*flush_data_cache_page)(unsigned long addr); |
| 59 | |
| 60 | clear_page(addr); |
| 61 | if (pages_do_alias((unsigned long) addr, vaddr)) |
| 62 | flush_data_cache_page((unsigned long)addr); |
| 63 | } |
| 64 | |
| 65 | static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, |
| 66 | struct page *to) |
| 67 | { |
| 68 | extern void (*flush_data_cache_page)(unsigned long addr); |
| 69 | |
| 70 | copy_page(vto, vfrom); |
| 71 | if (pages_do_alias((unsigned long)vto, vaddr)) |
| 72 | flush_data_cache_page((unsigned long)vto); |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * These are used to make use of C type-checking.. |
| 77 | */ |
| 78 | #ifdef CONFIG_64BIT_PHYS_ADDR |
Ralf Baechle | ec917c2 | 2005-10-07 16:58:15 +0100 | [diff] [blame] | 79 | #ifdef CONFIG_CPU_MIPS32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | typedef struct { unsigned long pte_low, pte_high; } pte_t; |
| 81 | #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) |
| 82 | #else |
| 83 | typedef struct { unsigned long long pte; } pte_t; |
| 84 | #define pte_val(x) ((x).pte) |
| 85 | #endif |
| 86 | #else |
| 87 | typedef struct { unsigned long pte; } pte_t; |
| 88 | #define pte_val(x) ((x).pte) |
| 89 | #endif |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 90 | #define __pte(x) ((pte_t) { (x) } ) |
| 91 | |
| 92 | /* |
| 93 | * For 3-level pagetables we defines these ourselves, for 2-level the |
| 94 | * definitions are supplied by <asm-generic/pgtable-nopmd.h>. |
| 95 | */ |
| 96 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | typedef struct { unsigned long pmd; } pmd_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #define pmd_val(x) ((x).pmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #define __pmd(x) ((pmd_t) { (x) } ) |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 101 | |
| 102 | #endif |
| 103 | |
| 104 | /* |
| 105 | * Right now we don't support 4-level pagetables, so all pud-related |
| 106 | * definitions come from <asm-generic/pgtable-nopud.h>. |
| 107 | */ |
| 108 | |
| 109 | /* |
| 110 | * Finall the top of the hierarchy, the pgd |
| 111 | */ |
| 112 | typedef struct { unsigned long pgd; } pgd_t; |
| 113 | #define pgd_val(x) ((x).pgd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #define __pgd(x) ((pgd_t) { (x) } ) |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 115 | |
| 116 | /* |
| 117 | * Manipulate page protection bits |
| 118 | */ |
| 119 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 120 | #define pgprot_val(x) ((x).pgprot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 122 | |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 123 | /* |
| 124 | * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd |
| 125 | * pair of pages we only have a single global bit per pair of pages. When |
| 126 | * writing to the TLB make sure we always have the bit set for both pages |
| 127 | * or none. This macro is used to access the `buddy' of the pte we're just |
| 128 | * working on. |
| 129 | */ |
| 130 | #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) |
| 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | #endif /* !__ASSEMBLY__ */ |
| 133 | |
| 134 | /* to align the pointer to the (next) page boundary */ |
| 135 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) |
| 136 | |
| 137 | #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) |
| 138 | #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) |
| 139 | |
| 140 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
| 141 | |
Chad Reese | b1c231f | 2006-05-30 17:16:49 -0700 | [diff] [blame^] | 142 | #ifndef CONFIG_SPARSEMEM |
Yoichi Yuasa | b4819b5 | 2005-06-25 14:54:31 -0700 | [diff] [blame] | 143 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
| 145 | #endif |
Chad Reese | b1c231f | 2006-05-30 17:16:49 -0700 | [diff] [blame^] | 146 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
| 149 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
| 150 | |
| 151 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| 152 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 153 | |
| 154 | #define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE) |
| 155 | #define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET) |
| 156 | |
| 157 | #endif /* defined (__KERNEL__) */ |
| 158 | |
| 159 | #ifdef CONFIG_LIMITED_DMA |
| 160 | #define WANT_PAGE_VIRTUAL |
| 161 | #endif |
| 162 | |
KAMEZAWA Hiroyuki | a02036e | 2006-03-27 01:15:43 -0800 | [diff] [blame] | 163 | #include <asm-generic/memory_model.h> |
Stephen Rothwell | fd4fd5a | 2005-09-03 15:54:30 -0700 | [diff] [blame] | 164 | #include <asm-generic/page.h> |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | #endif /* _ASM_PAGE_H */ |