Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 1 | #ifndef _ASM_SCORE_PGTABLE_H |
| 2 | #define _ASM_SCORE_PGTABLE_H |
| 3 | |
| 4 | #include <linux/const.h> |
| 5 | #include <asm-generic/pgtable-nopmd.h> |
| 6 | |
| 7 | #include <asm/fixmap.h> |
| 8 | #include <asm/setup.h> |
| 9 | #include <asm/pgtable-bits.h> |
| 10 | |
| 11 | extern void load_pgd(unsigned long pg_dir); |
| 12 | extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)]; |
| 13 | |
| 14 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ |
| 15 | #define PGDIR_SHIFT 22 |
| 16 | #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) |
| 17 | #define PGDIR_MASK (~(PGDIR_SIZE - 1)) |
| 18 | |
| 19 | /* |
| 20 | * Entries per page directory level: we use two-level, so |
| 21 | * we don't really have any PUD/PMD directory physically. |
| 22 | */ |
| 23 | #define PGD_ORDER 0 |
| 24 | #define PTE_ORDER 0 |
| 25 | |
| 26 | #define PTRS_PER_PGD 1024 |
| 27 | #define PTRS_PER_PTE 1024 |
| 28 | |
| 29 | #define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE) |
| 30 | #define FIRST_USER_ADDRESS 0 |
| 31 | |
| 32 | #define VMALLOC_START (0xc0000000UL) |
| 33 | |
| 34 | #define PKMAP_BASE (0xfd000000UL) |
| 35 | |
| 36 | #define VMALLOC_END (FIXADDR_START - 2*PAGE_SIZE) |
| 37 | |
| 38 | #define pte_ERROR(e) \ |
| 39 | printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ |
| 40 | __FILE__, __LINE__, pte_val(e)) |
| 41 | #define pgd_ERROR(e) \ |
| 42 | printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ |
| 43 | __FILE__, __LINE__, pgd_val(e)) |
| 44 | |
| 45 | /* |
| 46 | * Empty pgd/pmd entries point to the invalid_pte_table. |
| 47 | */ |
| 48 | static inline int pmd_none(pmd_t pmd) |
| 49 | { |
| 50 | return pmd_val(pmd) == (unsigned long) invalid_pte_table; |
| 51 | } |
| 52 | |
| 53 | #define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK) |
| 54 | |
| 55 | static inline int pmd_present(pmd_t pmd) |
| 56 | { |
| 57 | return pmd_val(pmd) != (unsigned long) invalid_pte_table; |
| 58 | } |
| 59 | |
| 60 | static inline void pmd_clear(pmd_t *pmdp) |
| 61 | { |
| 62 | pmd_val(*pmdp) = ((unsigned long) invalid_pte_table); |
| 63 | } |
| 64 | |
| 65 | #define pte_page(x) pfn_to_page(pte_pfn(x)) |
| 66 | #define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT)) |
| 67 | #define pfn_pte(pfn, prot) \ |
| 68 | __pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| 69 | |
| 70 | #define __pgd_offset(address) pgd_index(address) |
| 71 | #define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) |
| 72 | #define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) |
| 73 | |
| 74 | /* to find an entry in a kernel page-table-directory */ |
| 75 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) |
| 76 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) |
| 77 | |
| 78 | /* to find an entry in a page-table-directory */ |
| 79 | #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) |
| 80 | |
| 81 | /* Find an entry in the third-level page table.. */ |
| 82 | #define __pte_offset(address) \ |
| 83 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
| 84 | #define pte_offset(dir, address) \ |
| 85 | ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) |
| 86 | #define pte_offset_kernel(dir, address) \ |
| 87 | ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address)) |
| 88 | |
| 89 | #define pte_offset_map(dir, address) \ |
| 90 | ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) |
| 91 | #define pte_offset_map_nested(dir, address) \ |
| 92 | ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address)) |
| 93 | #define pte_unmap(pte) ((void)(pte)) |
| 94 | #define pte_unmap_nested(pte) ((void)(pte)) |
| 95 | |
| 96 | /* |
| 97 | * Bits 9(_PAGE_PRESENT) and 10(_PAGE_FILE)are taken, |
| 98 | * split up 30 bits of offset into this range: |
| 99 | */ |
| 100 | #define PTE_FILE_MAX_BITS 30 |
| 101 | #define pte_to_pgoff(_pte) \ |
| 102 | (((_pte).pte & 0x1ff) | (((_pte).pte >> 11) << 9)) |
| 103 | #define pgoff_to_pte(off) \ |
| 104 | ((pte_t) {((off) & 0x1ff) | (((off) >> 9) << 11) | _PAGE_FILE}) |
| 105 | #define __pte_to_swp_entry(pte) \ |
| 106 | ((swp_entry_t) { pte_val(pte)}) |
| 107 | #define __swp_entry_to_pte(x) ((pte_t) {(x).val}) |
| 108 | |
Chen Liqin | ffa818b | 2009-08-30 12:30:16 +0800 | [diff] [blame] | 109 | #define pmd_phys(pmd) __pa((void *)pmd_val(pmd)) |
| 110 | #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 111 | #define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot) |
| 112 | static inline pte_t pte_mkspecial(pte_t pte) { return pte; } |
| 113 | |
| 114 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) |
| 115 | #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) |
| 116 | #define pte_clear(mm, addr, xp) \ |
| 117 | do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) |
| 118 | |
| 119 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
| 120 | remap_pfn_range(vma, vaddr, pfn, size, prot) |
| 121 | |
Chen Liqin | 0402c91 | 2009-06-19 13:53:49 +0800 | [diff] [blame] | 122 | /* |
| 123 | * The "pgd_xxx()" functions here are trivial for a folded two-level |
| 124 | * setup: the pgd is never bad, and a pmd always exists (as it's folded |
| 125 | * into the pgd entry) |
| 126 | */ |
| 127 | #define pgd_present(pgd) (1) |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 128 | #define pgd_none(pgd) (0) |
| 129 | #define pgd_bad(pgd) (0) |
Chen Liqin | 0402c91 | 2009-06-19 13:53:49 +0800 | [diff] [blame] | 130 | #define pgd_clear(pgdp) do { } while (0) |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 131 | |
| 132 | #define kern_addr_valid(addr) (1) |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 133 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
| 134 | |
| 135 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) |
| 136 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) |
| 137 | |
Chen Liqin | 0402c91 | 2009-06-19 13:53:49 +0800 | [diff] [blame] | 138 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_CACHE) |
| 139 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ |
| 140 | _PAGE_CACHE) |
| 141 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE) |
| 142 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE) |
| 143 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
| 144 | _PAGE_GLOBAL | _PAGE_CACHE) |
| 145 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ |
| 146 | __WRITEABLE | _PAGE_GLOBAL & ~_PAGE_CACHE) |
| 147 | |
| 148 | #define __P000 PAGE_NONE |
| 149 | #define __P001 PAGE_READONLY |
| 150 | #define __P010 PAGE_COPY |
| 151 | #define __P011 PAGE_COPY |
| 152 | #define __P100 PAGE_READONLY |
| 153 | #define __P101 PAGE_READONLY |
| 154 | #define __P110 PAGE_COPY |
| 155 | #define __P111 PAGE_COPY |
| 156 | |
| 157 | #define __S000 PAGE_NONE |
| 158 | #define __S001 PAGE_READONLY |
| 159 | #define __S010 PAGE_SHARED |
| 160 | #define __S011 PAGE_SHARED |
| 161 | #define __S100 PAGE_READONLY |
| 162 | #define __S101 PAGE_READONLY |
| 163 | #define __S110 PAGE_SHARED |
| 164 | #define __S111 PAGE_SHARED |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 165 | |
Chen Liqin | ffa818b | 2009-08-30 12:30:16 +0800 | [diff] [blame] | 166 | #define pgprot_noncached pgprot_noncached |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 167 | |
Chen Liqin | ffa818b | 2009-08-30 12:30:16 +0800 | [diff] [blame] | 168 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) |
| 169 | { |
| 170 | unsigned long prot = pgprot_val(_prot); |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 171 | |
Chen Liqin | ffa818b | 2009-08-30 12:30:16 +0800 | [diff] [blame] | 172 | prot = (prot & ~_CACHE_MASK); |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 173 | |
Chen Liqin | ffa818b | 2009-08-30 12:30:16 +0800 | [diff] [blame] | 174 | return __pgprot(prot); |
| 175 | } |
| 176 | |
| 177 | #define __swp_type(x) ((x).val & 0x1f) |
| 178 | #define __swp_offset(x) ((x).val >> 11) |
| 179 | #define __swp_entry(type, offset) ((swp_entry_t){(type) | ((offset) << 11)}) |
| 180 | |
| 181 | extern unsigned long empty_zero_page; |
| 182 | extern unsigned long zero_page_mask; |
| 183 | |
| 184 | #define ZERO_PAGE(vaddr) \ |
| 185 | (virt_to_page((void *)(empty_zero_page + \ |
| 186 | (((unsigned long)(vaddr)) & zero_page_mask)))) |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 187 | |
| 188 | #define pgtable_cache_init() do {} while (0) |
| 189 | |
| 190 | #define arch_enter_lazy_cpu_mode() do {} while (0) |
| 191 | |
| 192 | static inline int pte_write(pte_t pte) |
| 193 | { |
| 194 | return pte_val(pte) & _PAGE_WRITE; |
| 195 | } |
| 196 | |
| 197 | static inline int pte_dirty(pte_t pte) |
| 198 | { |
| 199 | return pte_val(pte) & _PAGE_MODIFIED; |
| 200 | } |
| 201 | |
| 202 | static inline int pte_young(pte_t pte) |
| 203 | { |
| 204 | return pte_val(pte) & _PAGE_ACCESSED; |
| 205 | } |
| 206 | |
| 207 | static inline int pte_file(pte_t pte) |
| 208 | { |
| 209 | return pte_val(pte) & _PAGE_FILE; |
| 210 | } |
| 211 | |
| 212 | #define pte_special(pte) (0) |
| 213 | |
| 214 | static inline pte_t pte_wrprotect(pte_t pte) |
| 215 | { |
| 216 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
| 217 | return pte; |
| 218 | } |
| 219 | |
| 220 | static inline pte_t pte_mkclean(pte_t pte) |
| 221 | { |
| 222 | pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE); |
| 223 | return pte; |
| 224 | } |
| 225 | |
| 226 | static inline pte_t pte_mkold(pte_t pte) |
| 227 | { |
| 228 | pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); |
| 229 | return pte; |
| 230 | } |
| 231 | |
| 232 | static inline pte_t pte_mkwrite(pte_t pte) |
| 233 | { |
| 234 | pte_val(pte) |= _PAGE_WRITE; |
| 235 | if (pte_val(pte) & _PAGE_MODIFIED) |
| 236 | pte_val(pte) |= _PAGE_SILENT_WRITE; |
| 237 | return pte; |
| 238 | } |
| 239 | |
| 240 | static inline pte_t pte_mkdirty(pte_t pte) |
| 241 | { |
| 242 | pte_val(pte) |= _PAGE_MODIFIED; |
| 243 | if (pte_val(pte) & _PAGE_WRITE) |
| 244 | pte_val(pte) |= _PAGE_SILENT_WRITE; |
| 245 | return pte; |
| 246 | } |
| 247 | |
| 248 | static inline pte_t pte_mkyoung(pte_t pte) |
| 249 | { |
| 250 | pte_val(pte) |= _PAGE_ACCESSED; |
| 251 | if (pte_val(pte) & _PAGE_READ) |
| 252 | pte_val(pte) |= _PAGE_SILENT_READ; |
| 253 | return pte; |
| 254 | } |
| 255 | |
| 256 | #define set_pmd(pmdptr, pmdval) \ |
| 257 | do { *(pmdptr) = (pmdval); } while (0) |
| 258 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) |
| 259 | |
| 260 | extern unsigned long pgd_current; |
Chen Liqin | ffa818b | 2009-08-30 12:30:16 +0800 | [diff] [blame] | 261 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 262 | extern void paging_init(void); |
| 263 | |
| 264 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 265 | { |
| 266 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)); |
| 267 | } |
| 268 | |
| 269 | extern void __update_tlb(struct vm_area_struct *vma, |
| 270 | unsigned long address, pte_t pte); |
| 271 | extern void __update_cache(struct vm_area_struct *vma, |
| 272 | unsigned long address, pte_t pte); |
| 273 | |
| 274 | static inline void update_mmu_cache(struct vm_area_struct *vma, |
Russell King | 4b3073e | 2009-12-18 16:40:18 +0000 | [diff] [blame] | 275 | unsigned long address, pte_t *ptep) |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 276 | { |
Russell King | 4b3073e | 2009-12-18 16:40:18 +0000 | [diff] [blame] | 277 | pte_t pte = *ptep; |
Chen Liqin | 6bc9a39 | 2009-06-12 22:01:00 +0800 | [diff] [blame] | 278 | __update_tlb(vma, address, pte); |
| 279 | __update_cache(vma, address, pte); |
| 280 | } |
| 281 | |
| 282 | #ifndef __ASSEMBLY__ |
| 283 | #include <asm-generic/pgtable.h> |
| 284 | |
| 285 | void setup_memory(void); |
| 286 | #endif /* __ASSEMBLY__ */ |
| 287 | |
| 288 | #endif /* _ASM_SCORE_PGTABLE_H */ |