1#ifndef _MCF_PGTABLE_H 2#define _MCF_PGTABLE_H 3 4#include <asm/mcfmmu.h> 5#include <asm/page.h> 6 7/* 8 * MMUDR bits, in proper place. We write these directly into the MMUDR 9 * after masking from the pte. 10 */ 11#define CF_PAGE_LOCKED MMUDR_LK /* 0x00000002 */ 12#define CF_PAGE_EXEC MMUDR_X /* 0x00000004 */ 13#define CF_PAGE_WRITABLE MMUDR_W /* 0x00000008 */ 14#define CF_PAGE_READABLE MMUDR_R /* 0x00000010 */ 15#define CF_PAGE_SYSTEM MMUDR_SP /* 0x00000020 */ 16#define CF_PAGE_COPYBACK MMUDR_CM_CCB /* 0x00000040 */ 17#define CF_PAGE_NOCACHE MMUDR_CM_NCP /* 0x00000080 */ 18 19#define CF_CACHEMASK (~MMUDR_CM_CCB) 20#define CF_PAGE_MMUDR_MASK 0x000000fe 21 22#define _PAGE_NOCACHE030 CF_PAGE_NOCACHE 23 24/* 25 * MMUTR bits, need shifting down. 26 */ 27#define CF_PAGE_MMUTR_MASK 0x00000c00 28#define CF_PAGE_MMUTR_SHIFT 10 29 30#define CF_PAGE_VALID (MMUTR_V << CF_PAGE_MMUTR_SHIFT) 31#define CF_PAGE_SHARED (MMUTR_SG << CF_PAGE_MMUTR_SHIFT) 32 33/* 34 * Fake bits, not implemented in CF, will get masked out before 35 * hitting hardware. 36 */ 37#define CF_PAGE_DIRTY 0x00000001 38#define CF_PAGE_FILE 0x00000200 39#define CF_PAGE_ACCESSED 0x00001000 40 41#define _PAGE_CACHE040 0x020 /* 68040 cache mode, cachable, copyback */ 42#define _PAGE_NOCACHE_S 0x040 /* 68040 no-cache mode, serialized */ 43#define _PAGE_NOCACHE 0x060 /* 68040 cache mode, non-serialized */ 44#define _PAGE_CACHE040W 0x000 /* 68040 cache mode, cachable, write-through */ 45#define _DESCTYPE_MASK 0x003 46#define _CACHEMASK040 (~0x060) 47#define _PAGE_GLOBAL040 0x400 /* 68040 global bit, used for kva descs */ 48 49/* 50 * Externally used page protection values. 51 */ 52#define _PAGE_PRESENT (CF_PAGE_VALID) 53#define _PAGE_ACCESSED (CF_PAGE_ACCESSED) 54#define _PAGE_DIRTY (CF_PAGE_DIRTY) 55#define _PAGE_READWRITE (CF_PAGE_READABLE \ 56 | CF_PAGE_WRITABLE \ 57 | CF_PAGE_SYSTEM \ 58 | CF_PAGE_SHARED) 59 60/* 61 * Compound page protection values. 62 */ 63#define PAGE_NONE __pgprot(CF_PAGE_VALID \ 64 | CF_PAGE_ACCESSED) 65 66#define PAGE_SHARED __pgprot(CF_PAGE_VALID \ 67 | CF_PAGE_ACCESSED \ 68 | CF_PAGE_SHARED) 69 70#define PAGE_INIT __pgprot(CF_PAGE_VALID \ 71 | CF_PAGE_READABLE \ 72 | CF_PAGE_WRITABLE \ 73 | CF_PAGE_EXEC \ 74 | CF_PAGE_SYSTEM) 75 76#define PAGE_KERNEL __pgprot(CF_PAGE_VALID \ 77 | CF_PAGE_ACCESSED \ 78 | CF_PAGE_READABLE \ 79 | CF_PAGE_WRITABLE \ 80 | CF_PAGE_EXEC \ 81 | CF_PAGE_SYSTEM \ 82 | CF_PAGE_SHARED) 83 84#define PAGE_COPY __pgprot(CF_PAGE_VALID \ 85 | CF_PAGE_ACCESSED \ 86 | CF_PAGE_READABLE \ 87 | CF_PAGE_DIRTY) 88 89/* 90 * Page protections for initialising protection_map. See mm/mmap.c 91 * for use. In general, the bit positions are xwr, and P-items are 92 * private, the S-items are shared. 93 */ 94#define __P000 PAGE_NONE 95#define __P001 __pgprot(CF_PAGE_VALID \ 96 | CF_PAGE_ACCESSED \ 97 | CF_PAGE_READABLE) 98#define __P010 __pgprot(CF_PAGE_VALID \ 99 | CF_PAGE_ACCESSED \ 100 | CF_PAGE_WRITABLE) 101#define __P011 __pgprot(CF_PAGE_VALID \ 102 | CF_PAGE_ACCESSED \ 103 | CF_PAGE_READABLE \ 104 | CF_PAGE_WRITABLE) 105#define __P100 __pgprot(CF_PAGE_VALID \ 106 | CF_PAGE_ACCESSED \ 107 | CF_PAGE_EXEC) 108#define __P101 __pgprot(CF_PAGE_VALID \ 109 | CF_PAGE_ACCESSED \ 110 | CF_PAGE_READABLE \ 111 | CF_PAGE_EXEC) 112#define __P110 __pgprot(CF_PAGE_VALID \ 113 | CF_PAGE_ACCESSED \ 114 | CF_PAGE_WRITABLE \ 115 | CF_PAGE_EXEC) 116#define __P111 __pgprot(CF_PAGE_VALID \ 117 | CF_PAGE_ACCESSED \ 118 | CF_PAGE_READABLE \ 119 | CF_PAGE_WRITABLE \ 120 | CF_PAGE_EXEC) 121 122#define __S000 PAGE_NONE 123#define __S001 __pgprot(CF_PAGE_VALID \ 124 | CF_PAGE_ACCESSED \ 125 | CF_PAGE_READABLE) 126#define __S010 PAGE_SHARED 127#define __S011 __pgprot(CF_PAGE_VALID \ 128 | CF_PAGE_ACCESSED \ 129 | CF_PAGE_SHARED \ 130 | CF_PAGE_READABLE) 131#define __S100 __pgprot(CF_PAGE_VALID \ 132 | CF_PAGE_ACCESSED \ 133 | CF_PAGE_EXEC) 134#define __S101 __pgprot(CF_PAGE_VALID \ 135 | CF_PAGE_ACCESSED \ 136 | CF_PAGE_READABLE \ 137 | CF_PAGE_EXEC) 138#define __S110 __pgprot(CF_PAGE_VALID \ 139 | CF_PAGE_ACCESSED \ 140 | CF_PAGE_SHARED \ 141 | CF_PAGE_EXEC) 142#define __S111 __pgprot(CF_PAGE_VALID \ 143 | CF_PAGE_ACCESSED \ 144 | CF_PAGE_SHARED \ 145 | CF_PAGE_READABLE \ 146 | CF_PAGE_EXEC) 147 148#define PTE_MASK PAGE_MASK 149#define CF_PAGE_CHG_MASK (PTE_MASK | CF_PAGE_ACCESSED | CF_PAGE_DIRTY) 150 151#ifndef __ASSEMBLY__ 152 153/* 154 * Conversion functions: convert a page and protection to a page entry, 155 * and a page entry and page directory to the page they refer to. 156 */ 157#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 158 159static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 160{ 161 pte_val(pte) = (pte_val(pte) & CF_PAGE_CHG_MASK) | pgprot_val(newprot); 162 return pte; 163} 164 165#define pmd_set(pmdp, ptep) do {} while (0) 166 167static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) 168{ 169 pgd_val(*pgdp) = virt_to_phys(pmdp); 170} 171 172#define __pte_page(pte) ((unsigned long) (pte_val(pte) & PAGE_MASK)) 173#define __pmd_page(pmd) ((unsigned long) (pmd_val(pmd))) 174 175static inline int pte_none(pte_t pte) 176{ 177 return !pte_val(pte); 178} 179 180static inline int pte_present(pte_t pte) 181{ 182 return pte_val(pte) & CF_PAGE_VALID; 183} 184 185static inline void pte_clear(struct mm_struct *mm, unsigned long addr, 186 pte_t *ptep) 187{ 188 pte_val(*ptep) = 0; 189} 190 191#define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT) 192#define pte_page(pte) virt_to_page(__pte_page(pte)) 193 194static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); } 195#define pmd_none(pmd) pmd_none2(&(pmd)) 196static inline int pmd_bad2(pmd_t *pmd) { return 0; } 197#define pmd_bad(pmd) pmd_bad2(&(pmd)) 198#define pmd_present(pmd) (!pmd_none2(&(pmd))) 199static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; } 200 201static inline int pgd_none(pgd_t pgd) { return 0; } 202static inline int pgd_bad(pgd_t pgd) { return 0; } 203static inline int pgd_present(pgd_t pgd) { return 1; } 204static inline void pgd_clear(pgd_t *pgdp) {} 205 206#define pte_ERROR(e) \ 207 printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ 208 __FILE__, __LINE__, pte_val(e)) 209#define pmd_ERROR(e) \ 210 printk(KERN_ERR "%s:%d: bad pmd %08lx.\n", \ 211 __FILE__, __LINE__, pmd_val(e)) 212#define pgd_ERROR(e) \ 213 printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ 214 __FILE__, __LINE__, pgd_val(e)) 215 216/* 217 * The following only work if pte_present() is true. 218 * Undefined behaviour if not... 219 * [we have the full set here even if they don't change from m68k] 220 */ 221static inline int pte_read(pte_t pte) 222{ 223 return pte_val(pte) & CF_PAGE_READABLE; 224} 225 226static inline int pte_write(pte_t pte) 227{ 228 return pte_val(pte) & CF_PAGE_WRITABLE; 229} 230 231static inline int pte_exec(pte_t pte) 232{ 233 return pte_val(pte) & CF_PAGE_EXEC; 234} 235 236static inline int pte_dirty(pte_t pte) 237{ 238 return pte_val(pte) & CF_PAGE_DIRTY; 239} 240 241static inline int pte_young(pte_t pte) 242{ 243 return pte_val(pte) & CF_PAGE_ACCESSED; 244} 245 246static inline int pte_file(pte_t pte) 247{ 248 return pte_val(pte) & CF_PAGE_FILE; 249} 250 251static inline int pte_special(pte_t pte) 252{ 253 return 0; 254} 255 256static inline pte_t pte_wrprotect(pte_t pte) 257{ 258 pte_val(pte) &= ~CF_PAGE_WRITABLE; 259 return pte; 260} 261 262static inline pte_t pte_rdprotect(pte_t pte) 263{ 264 pte_val(pte) &= ~CF_PAGE_READABLE; 265 return pte; 266} 267 268static inline pte_t pte_exprotect(pte_t pte) 269{ 270 pte_val(pte) &= ~CF_PAGE_EXEC; 271 return pte; 272} 273 274static inline pte_t pte_mkclean(pte_t pte) 275{ 276 pte_val(pte) &= ~CF_PAGE_DIRTY; 277 return pte; 278} 279 280static inline pte_t pte_mkold(pte_t pte) 281{ 282 pte_val(pte) &= ~CF_PAGE_ACCESSED; 283 return pte; 284} 285 286static inline pte_t pte_mkwrite(pte_t pte) 287{ 288 pte_val(pte) |= CF_PAGE_WRITABLE; 289 return pte; 290} 291 292static inline pte_t pte_mkread(pte_t pte) 293{ 294 pte_val(pte) |= CF_PAGE_READABLE; 295 return pte; 296} 297 298static inline pte_t pte_mkexec(pte_t pte) 299{ 300 pte_val(pte) |= CF_PAGE_EXEC; 301 return pte; 302} 303 304static inline pte_t pte_mkdirty(pte_t pte) 305{ 306 pte_val(pte) |= CF_PAGE_DIRTY; 307 return pte; 308} 309 310static inline pte_t pte_mkyoung(pte_t pte) 311{ 312 pte_val(pte) |= CF_PAGE_ACCESSED; 313 return pte; 314} 315 316static inline pte_t pte_mknocache(pte_t pte) 317{ 318 pte_val(pte) |= 0x80 | (pte_val(pte) & ~0x40); 319 return pte; 320} 321 322static inline pte_t pte_mkcache(pte_t pte) 323{ 324 pte_val(pte) &= ~CF_PAGE_NOCACHE; 325 return pte; 326} 327 328static inline pte_t pte_mkspecial(pte_t pte) 329{ 330 return pte; 331} 332 333#define swapper_pg_dir kernel_pg_dir 334extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; 335 336/* 337 * Find an entry in a pagetable directory. 338 */ 339#define pgd_index(address) ((address) >> PGDIR_SHIFT) 340#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 341 342/* 343 * Find an entry in a kernel pagetable directory. 344 */ 345#define pgd_offset_k(address) pgd_offset(&init_mm, address) 346 347/* 348 * Find an entry in the second-level pagetable. 349 */ 350static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address) 351{ 352 return (pmd_t *) pgd; 353} 354 355/* 356 * Find an entry in the third-level pagetable. 357 */ 358#define __pte_offset(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) 359#define pte_offset_kernel(dir, address) \ 360 ((pte_t *) __pmd_page(*(dir)) + __pte_offset(address)) 361 362/* 363 * Disable caching for page at given kernel virtual address. 364 */ 365static inline void nocache_page(void *vaddr) 366{ 367 pgd_t *dir; 368 pmd_t *pmdp; 369 pte_t *ptep; 370 unsigned long addr = (unsigned long) vaddr; 371 372 dir = pgd_offset_k(addr); 373 pmdp = pmd_offset(dir, addr); 374 ptep = pte_offset_kernel(pmdp, addr); 375 *ptep = pte_mknocache(*ptep); 376} 377 378/* 379 * Enable caching for page at given kernel virtual address. 380 */ 381static inline void cache_page(void *vaddr) 382{ 383 pgd_t *dir; 384 pmd_t *pmdp; 385 pte_t *ptep; 386 unsigned long addr = (unsigned long) vaddr; 387 388 dir = pgd_offset_k(addr); 389 pmdp = pmd_offset(dir, addr); 390 ptep = pte_offset_kernel(pmdp, addr); 391 *ptep = pte_mkcache(*ptep); 392} 393 394#define PTE_FILE_MAX_BITS 21 395#define PTE_FILE_SHIFT 11 396 397static inline unsigned long pte_to_pgoff(pte_t pte) 398{ 399 return pte_val(pte) >> PTE_FILE_SHIFT; 400} 401 402static inline pte_t pgoff_to_pte(unsigned pgoff) 403{ 404 return __pte((pgoff << PTE_FILE_SHIFT) + CF_PAGE_FILE); 405} 406 407/* 408 * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) 409 */ 410#define __swp_type(x) ((x).val & 0xFF) 411#define __swp_offset(x) ((x).val >> PTE_FILE_SHIFT) 412#define __swp_entry(typ, off) ((swp_entry_t) { (typ) | \ 413 (off << PTE_FILE_SHIFT) }) 414#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 415#define __swp_entry_to_pte(x) (__pte((x).val)) 416 417#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) 418 419#define pte_offset_map(pmdp, addr) ((pte_t *)__pmd_page(*pmdp) + \ 420 __pte_offset(addr)) 421#define pte_unmap(pte) ((void) 0) 422#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) 423#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) 424 425#endif /* !__ASSEMBLY__ */ 426#endif /* _MCF_PGTABLE_H */ 427