Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 1 | /* |
| 2 | * This file contains the functions and defines necessary to modify and |
| 3 | * use the SuperH page table tree. |
| 4 | * |
| 5 | * Copyright (C) 1999 Niibe Yutaka |
| 6 | * Copyright (C) 2002 - 2005 Paul Mundt |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General |
| 9 | * Public License. See the file "COPYING" in the main directory of this |
| 10 | * archive for more details. |
| 11 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #ifndef __ASM_SH_PGTABLE_H |
| 13 | #define __ASM_SH_PGTABLE_H |
| 14 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 15 | #include <asm-generic/pgtable-nopmd.h> |
| 16 | #include <asm/page.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 18 | #define PTRS_PER_PGD 1024 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #ifndef __ASSEMBLY__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <asm/addrspace.h> |
| 22 | #include <asm/fixmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
| 25 | extern void paging_init(void); |
| 26 | |
| 27 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | * ZERO_PAGE is a global shared page that is always zero: used |
| 29 | * for zero-mapped memory areas etc.. |
| 30 | */ |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 31 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 33 | |
| 34 | #endif /* !__ASSEMBLY__ */ |
| 35 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 36 | /* traditional two-level paging structure */ |
| 37 | #define PGDIR_SHIFT 22 |
| 38 | #define PTRS_PER_PMD 1 |
| 39 | #define PTRS_PER_PTE 1024 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define PMD_SIZE (1UL << PMD_SHIFT) |
| 41 | #define PMD_MASK (~(PMD_SIZE-1)) |
| 42 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
| 43 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
| 44 | |
| 45 | #define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE) |
Hugh Dickins | d455a36 | 2005-04-19 13:29:23 -0700 | [diff] [blame] | 46 | #define FIRST_USER_ADDRESS 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #define PTE_PHYS_MASK 0x1ffff000 |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | /* |
| 51 | * First 1MB map is used by fixed purpose. |
| 52 | * Currently only 4-enty (16kB) is used (see arch/sh/mm/cache.c) |
| 53 | */ |
| 54 | #define VMALLOC_START (P3SEG+0x00100000) |
| 55 | #define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE) |
| 56 | |
| 57 | #define _PAGE_WT 0x001 /* WT-bit on SH-4, 0 on SH-3 */ |
| 58 | #define _PAGE_HW_SHARED 0x002 /* SH-bit : page is shared among processes */ |
| 59 | #define _PAGE_DIRTY 0x004 /* D-bit : page changed */ |
| 60 | #define _PAGE_CACHABLE 0x008 /* C-bit : cachable */ |
| 61 | #define _PAGE_SZ0 0x010 /* SZ0-bit : Size of page */ |
| 62 | #define _PAGE_RW 0x020 /* PR0-bit : write access allowed */ |
| 63 | #define _PAGE_USER 0x040 /* PR1-bit : user space access allowed */ |
| 64 | #define _PAGE_SZ1 0x080 /* SZ1-bit : Size of page (on SH-4) */ |
| 65 | #define _PAGE_PRESENT 0x100 /* V-bit : page is valid */ |
| 66 | #define _PAGE_PROTNONE 0x200 /* software: if not present */ |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 67 | #define _PAGE_ACCESSED 0x400 /* software: page referenced */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #define _PAGE_U0_SHARED 0x800 /* software: page is shared in user space */ |
| 69 | |
| 70 | #define _PAGE_FILE _PAGE_WT /* software: pagecache or swap? */ |
| 71 | |
| 72 | /* software: moves to PTEA.TC (Timing Control) */ |
| 73 | #define _PAGE_PCC_AREA5 0x00000000 /* use BSC registers for area5 */ |
| 74 | #define _PAGE_PCC_AREA6 0x80000000 /* use BSC registers for area6 */ |
| 75 | |
| 76 | /* software: moves to PTEA.SA[2:0] (Space Attributes) */ |
| 77 | #define _PAGE_PCC_IODYN 0x00000001 /* IO space, dynamically sized bus */ |
| 78 | #define _PAGE_PCC_IO8 0x20000000 /* IO space, 8 bit bus */ |
| 79 | #define _PAGE_PCC_IO16 0x20000001 /* IO space, 16 bit bus */ |
| 80 | #define _PAGE_PCC_COM8 0x40000000 /* Common Memory space, 8 bit bus */ |
| 81 | #define _PAGE_PCC_COM16 0x40000001 /* Common Memory space, 16 bit bus */ |
| 82 | #define _PAGE_PCC_ATR8 0x60000000 /* Attribute Memory space, 8 bit bus */ |
| 83 | #define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */ |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | /* Mask which drop software flags |
| 86 | * We also drop WT bit since it is used for _PAGE_FILE |
| 87 | * bit in this implementation. |
| 88 | */ |
| 89 | #define _PAGE_CLEAR_FLAGS (_PAGE_WT | _PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_U0_SHARED) |
| 90 | |
| 91 | #if defined(CONFIG_CPU_SH3) |
| 92 | /* |
| 93 | * MMU on SH-3 has bug on SH-bit: We can't use it if MMUCR.IX=1. |
| 94 | * Work around: Just drop SH-bit. |
| 95 | */ |
| 96 | #define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS | _PAGE_HW_SHARED)) |
| 97 | #else |
| 98 | #define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS)) |
| 99 | #endif |
| 100 | |
| 101 | /* Hardware flags: SZ0=1 (4k-byte) */ |
| 102 | #define _PAGE_FLAGS_HARD _PAGE_SZ0 |
| 103 | |
| 104 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) |
| 105 | #define _PAGE_SZHUGE (_PAGE_SZ1) |
| 106 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) |
| 107 | #define _PAGE_SZHUGE (_PAGE_SZ0 | _PAGE_SZ1) |
| 108 | #endif |
| 109 | |
| 110 | #define _PAGE_SHARED _PAGE_U0_SHARED |
| 111 | |
| 112 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 113 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 114 | #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_SHARED) |
| 115 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 116 | #ifndef __ASSEMBLY__ |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #ifdef CONFIG_MMU |
| 119 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE |_PAGE_ACCESSED | _PAGE_FLAGS_HARD) |
| 120 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_CACHABLE |_PAGE_ACCESSED | _PAGE_SHARED | _PAGE_FLAGS_HARD) |
| 121 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED | _PAGE_FLAGS_HARD) |
| 122 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED | _PAGE_FLAGS_HARD) |
| 123 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD) |
| 124 | #define PAGE_KERNEL_NOCACHE \ |
| 125 | __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD) |
| 126 | #define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD) |
| 127 | #define PAGE_KERNEL_PCC(slot, type) \ |
| 128 | __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_FLAGS_HARD | (slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | (type)) |
| 129 | #else /* no mmu */ |
| 130 | #define PAGE_NONE __pgprot(0) |
| 131 | #define PAGE_SHARED __pgprot(0) |
| 132 | #define PAGE_COPY __pgprot(0) |
| 133 | #define PAGE_READONLY __pgprot(0) |
| 134 | #define PAGE_KERNEL __pgprot(0) |
| 135 | #define PAGE_KERNEL_NOCACHE __pgprot(0) |
| 136 | #define PAGE_KERNEL_RO __pgprot(0) |
| 137 | #define PAGE_KERNEL_PCC __pgprot(0) |
| 138 | #endif |
| 139 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 140 | #endif /* __ASSEMBLY__ */ |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | /* |
| 143 | * As i386 and MIPS, SuperH can't do page protection for execute, and |
| 144 | * considers that the same as a read. Also, write permissions imply |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 145 | * read permissions. This is the closest we can get.. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | #define __P000 PAGE_NONE |
| 148 | #define __P001 PAGE_READONLY |
| 149 | #define __P010 PAGE_COPY |
| 150 | #define __P011 PAGE_COPY |
| 151 | #define __P100 PAGE_READONLY |
| 152 | #define __P101 PAGE_READONLY |
| 153 | #define __P110 PAGE_COPY |
| 154 | #define __P111 PAGE_COPY |
| 155 | |
| 156 | #define __S000 PAGE_NONE |
| 157 | #define __S001 PAGE_READONLY |
| 158 | #define __S010 PAGE_SHARED |
| 159 | #define __S011 PAGE_SHARED |
| 160 | #define __S100 PAGE_READONLY |
| 161 | #define __S101 PAGE_READONLY |
| 162 | #define __S110 PAGE_SHARED |
| 163 | #define __S111 PAGE_SHARED |
| 164 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 165 | #ifndef __ASSEMBLY__ |
| 166 | |
| 167 | /* |
| 168 | * Certain architectures need to do special things when PTEs |
| 169 | * within a page table are directly modified. Thus, the following |
| 170 | * hook is made available. |
| 171 | */ |
| 172 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) |
| 173 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) |
| 174 | |
| 175 | /* |
| 176 | * (pmds are folded into pgds so this doesn't get actually called, |
| 177 | * but the define is needed for a generic inline function.) |
| 178 | */ |
| 179 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) |
| 180 | |
| 181 | #define pte_pfn(x) ((unsigned long)(((x).pte >> PAGE_SHIFT))) |
| 182 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| 183 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | #define pte_none(x) (!pte_val(x)) |
| 186 | #define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE)) |
| 187 | #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) |
| 188 | |
| 189 | #define pmd_none(x) (!pmd_val(x)) |
| 190 | #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) |
| 191 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) |
| 192 | #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) |
| 193 | |
| 194 | #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 195 | #define pte_page(x) phys_to_page(pte_val(x)&PTE_PHYS_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | /* |
| 198 | * The following only work if pte_present() is true. |
| 199 | * Undefined behaviour if not.. |
| 200 | */ |
| 201 | static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
| 202 | static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
| 203 | static inline int pte_dirty(pte_t pte){ return pte_val(pte) & _PAGE_DIRTY; } |
| 204 | static inline int pte_young(pte_t pte){ return pte_val(pte) & _PAGE_ACCESSED; } |
| 205 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } |
| 206 | static inline int pte_write(pte_t pte){ return pte_val(pte) & _PAGE_RW; } |
| 207 | static inline int pte_not_present(pte_t pte){ return !(pte_val(pte) & _PAGE_PRESENT); } |
| 208 | |
| 209 | static inline pte_t pte_rdprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } |
| 210 | static inline pte_t pte_exprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } |
| 211 | static inline pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; } |
| 212 | static inline pte_t pte_mkold(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; } |
| 213 | static inline pte_t pte_wrprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; } |
| 214 | static inline pte_t pte_mkread(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; } |
| 215 | static inline pte_t pte_mkexec(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; } |
| 216 | static inline pte_t pte_mkdirty(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; } |
| 217 | static inline pte_t pte_mkyoung(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; } |
| 218 | static inline pte_t pte_mkwrite(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; } |
Paul Mundt | d229401 | 2005-11-07 00:58:23 -0800 | [diff] [blame] | 219 | #ifdef CONFIG_HUGETLB_PAGE |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 220 | static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_SZHUGE)); return pte; } |
Paul Mundt | d229401 | 2005-11-07 00:58:23 -0800 | [diff] [blame] | 221 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | /* |
| 224 | * Macro and implementation to make a page protection as uncachable. |
| 225 | */ |
| 226 | #define pgprot_noncached pgprot_noncached |
| 227 | |
| 228 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) |
| 229 | { |
| 230 | unsigned long prot = pgprot_val(_prot); |
| 231 | |
| 232 | prot &= ~_PAGE_CACHABLE; |
| 233 | return __pgprot(prot); |
| 234 | } |
| 235 | |
| 236 | #define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE) |
| 237 | |
| 238 | /* |
| 239 | * Conversion functions: convert a page and protection to a page entry, |
| 240 | * and a page entry and page directory to the page they refer to. |
| 241 | * |
| 242 | * extern pte_t mk_pte(struct page *page, pgprot_t pgprot) |
| 243 | */ |
| 244 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| 245 | |
| 246 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 247 | { set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot))); return pte; } |
| 248 | |
Dave McCracken | 46a82b2 | 2006-09-25 23:31:48 -0700 | [diff] [blame] | 249 | #define pmd_page_vaddr(pmd) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK)) |
| 251 | |
| 252 | #define pmd_page(pmd) \ |
| 253 | (phys_to_page(pmd_val(pmd))) |
| 254 | |
| 255 | /* to find an entry in a page-table-directory. */ |
| 256 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) |
| 257 | #define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address)) |
| 258 | |
| 259 | /* to find an entry in a kernel page-table-directory */ |
| 260 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) |
| 261 | |
| 262 | /* Find an entry in the third-level page table.. */ |
| 263 | #define pte_index(address) \ |
| 264 | ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
| 265 | #define pte_offset_kernel(dir, address) \ |
Dave McCracken | 46a82b2 | 2006-09-25 23:31:48 -0700 | [diff] [blame] | 266 | ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | #define pte_offset_map(dir, address) pte_offset_kernel(dir, address) |
| 268 | #define pte_offset_map_nested(dir, address) pte_offset_kernel(dir, address) |
| 269 | #define pte_unmap(pte) do { } while (0) |
| 270 | #define pte_unmap_nested(pte) do { } while (0) |
| 271 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 272 | #define pte_ERROR(e) \ |
| 273 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) |
| 274 | #define pgd_ERROR(e) \ |
| 275 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | struct vm_area_struct; |
| 278 | extern void update_mmu_cache(struct vm_area_struct * vma, |
| 279 | unsigned long address, pte_t pte); |
| 280 | |
| 281 | /* Encode and de-code a swap entry */ |
| 282 | /* |
| 283 | * NOTE: We should set ZEROs at the position of _PAGE_PRESENT |
| 284 | * and _PAGE_PROTNONE bits |
| 285 | */ |
| 286 | #define __swp_type(x) ((x).val & 0xff) |
| 287 | #define __swp_offset(x) ((x).val >> 10) |
| 288 | #define __swp_entry(type, offset) ((swp_entry_t) { (type) | ((offset) << 10) }) |
| 289 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 1 }) |
| 290 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val << 1 }) |
| 291 | |
| 292 | /* |
| 293 | * Encode and decode a nonlinear file mapping entry |
| 294 | */ |
| 295 | #define PTE_FILE_MAX_BITS 29 |
| 296 | #define pte_to_pgoff(pte) (pte_val(pte) >> 1) |
| 297 | #define pgoff_to_pte(off) ((pte_t) { ((off) << 1) | _PAGE_FILE }) |
| 298 | |
| 299 | typedef pte_t *pte_addr_t; |
| 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | #define kern_addr_valid(addr) (1) |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
| 304 | remap_pfn_range(vma, vaddr, pfn, size, prot) |
| 305 | |
| 306 | #define MK_IOSPACE_PFN(space, pfn) (pfn) |
| 307 | #define GET_IOSPACE(pfn) 0 |
| 308 | #define GET_PFN(pfn) (pfn) |
| 309 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 310 | struct mm_struct; |
| 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | /* |
| 313 | * No page table caches to initialise |
| 314 | */ |
| 315 | #define pgtable_cache_init() do { } while (0) |
| 316 | |
| 317 | #ifndef CONFIG_MMU |
| 318 | extern unsigned int kobjsize(const void *objp); |
| 319 | #endif /* !CONFIG_MMU */ |
| 320 | |
| 321 | #if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB) |
| 322 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
| 323 | extern pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep); |
| 324 | #endif |
| 325 | |
| 326 | #include <asm-generic/pgtable.h> |
| 327 | |
Paul Mundt | 26ff6c1 | 2006-09-27 15:13:36 +0900 | [diff] [blame] | 328 | #endif /* !__ASSEMBLY__ */ |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | #endif /* __ASM_SH_PAGE_H */ |
| 331 | |