1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _MCF_PGTABLE_H 3 #define _MCF_PGTABLE_H 4 5 #include <asm/mcfmmu.h> 6 #include <asm/page.h> 7 8 /* 9 * MMUDR bits, in proper place. We write these directly into the MMUDR 10 * after masking from the pte. 11 */ 12 #define CF_PAGE_LOCKED MMUDR_LK /* 0x00000002 */ 13 #define CF_PAGE_EXEC MMUDR_X /* 0x00000004 */ 14 #define CF_PAGE_WRITABLE MMUDR_W /* 0x00000008 */ 15 #define CF_PAGE_READABLE MMUDR_R /* 0x00000010 */ 16 #define CF_PAGE_SYSTEM MMUDR_SP /* 0x00000020 */ 17 #define CF_PAGE_COPYBACK MMUDR_CM_CCB /* 0x00000040 */ 18 #define CF_PAGE_NOCACHE MMUDR_CM_NCP /* 0x00000080 */ 19 20 #define CF_CACHEMASK (~MMUDR_CM_CCB) 21 #define CF_PAGE_MMUDR_MASK 0x000000fe 22 23 #define _PAGE_NOCACHE030 CF_PAGE_NOCACHE 24 25 /* 26 * MMUTR bits, need shifting down. 27 */ 28 #define CF_PAGE_MMUTR_MASK 0x00000c00 29 #define CF_PAGE_MMUTR_SHIFT 10 30 31 #define CF_PAGE_VALID (MMUTR_V << CF_PAGE_MMUTR_SHIFT) 32 #define CF_PAGE_SHARED (MMUTR_SG << CF_PAGE_MMUTR_SHIFT) 33 34 /* 35 * Fake bits, not implemented in CF, will get masked out before 36 * hitting hardware. 37 */ 38 #define CF_PAGE_DIRTY 0x00000001 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 #define pmd_pgtable(pmd) pfn_to_virt(pmd_val(pmd) >> PAGE_SHIFT) 154 155 /* 156 * Conversion functions: convert a page and protection to a page entry, 157 * and a page entry and page directory to the page they refer to. 158 */ 159 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 160 161 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 162 { 163 pte_val(pte) = (pte_val(pte) & CF_PAGE_CHG_MASK) | pgprot_val(newprot); 164 return pte; 165 } 166 167 #define pmd_set(pmdp, ptep) do {} while (0) 168 169 static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp) 170 { 171 pgd_val(*pgdp) = virt_to_phys(pmdp); 172 } 173 174 #define __pte_page(pte) ((unsigned long) (pte_val(pte) & PAGE_MASK)) 175 #define pmd_page_vaddr(pmd) ((unsigned long) (pmd_val(pmd))) 176 177 static inline int pte_none(pte_t pte) 178 { 179 return !pte_val(pte); 180 } 181 182 static inline int pte_present(pte_t pte) 183 { 184 return pte_val(pte) & CF_PAGE_VALID; 185 } 186 187 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, 188 pte_t *ptep) 189 { 190 pte_val(*ptep) = 0; 191 } 192 193 #define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT) 194 #define pte_page(pte) virt_to_page(__pte_page(pte)) 195 196 static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); } 197 #define pmd_none(pmd) pmd_none2(&(pmd)) 198 static inline int pmd_bad2(pmd_t *pmd) { return 0; } 199 #define pmd_bad(pmd) pmd_bad2(&(pmd)) 200 #define pmd_present(pmd) (!pmd_none2(&(pmd))) 201 static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; } 202 203 #define pte_ERROR(e) \ 204 printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \ 205 __FILE__, __LINE__, pte_val(e)) 206 #define pgd_ERROR(e) \ 207 printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \ 208 __FILE__, __LINE__, pgd_val(e)) 209 210 /* 211 * The following only work if pte_present() is true. 212 * Undefined behaviour if not... 213 * [we have the full set here even if they don't change from m68k] 214 */ 215 static inline int pte_read(pte_t pte) 216 { 217 return pte_val(pte) & CF_PAGE_READABLE; 218 } 219 220 static inline int pte_write(pte_t pte) 221 { 222 return pte_val(pte) & CF_PAGE_WRITABLE; 223 } 224 225 static inline int pte_exec(pte_t pte) 226 { 227 return pte_val(pte) & CF_PAGE_EXEC; 228 } 229 230 static inline int pte_dirty(pte_t pte) 231 { 232 return pte_val(pte) & CF_PAGE_DIRTY; 233 } 234 235 static inline int pte_young(pte_t pte) 236 { 237 return pte_val(pte) & CF_PAGE_ACCESSED; 238 } 239 240 static inline pte_t pte_wrprotect(pte_t pte) 241 { 242 pte_val(pte) &= ~CF_PAGE_WRITABLE; 243 return pte; 244 } 245 246 static inline pte_t pte_rdprotect(pte_t pte) 247 { 248 pte_val(pte) &= ~CF_PAGE_READABLE; 249 return pte; 250 } 251 252 static inline pte_t pte_exprotect(pte_t pte) 253 { 254 pte_val(pte) &= ~CF_PAGE_EXEC; 255 return pte; 256 } 257 258 static inline pte_t pte_mkclean(pte_t pte) 259 { 260 pte_val(pte) &= ~CF_PAGE_DIRTY; 261 return pte; 262 } 263 264 static inline pte_t pte_mkold(pte_t pte) 265 { 266 pte_val(pte) &= ~CF_PAGE_ACCESSED; 267 return pte; 268 } 269 270 static inline pte_t pte_mkwrite(pte_t pte) 271 { 272 pte_val(pte) |= CF_PAGE_WRITABLE; 273 return pte; 274 } 275 276 static inline pte_t pte_mkread(pte_t pte) 277 { 278 pte_val(pte) |= CF_PAGE_READABLE; 279 return pte; 280 } 281 282 static inline pte_t pte_mkexec(pte_t pte) 283 { 284 pte_val(pte) |= CF_PAGE_EXEC; 285 return pte; 286 } 287 288 static inline pte_t pte_mkdirty(pte_t pte) 289 { 290 pte_val(pte) |= CF_PAGE_DIRTY; 291 return pte; 292 } 293 294 static inline pte_t pte_mkyoung(pte_t pte) 295 { 296 pte_val(pte) |= CF_PAGE_ACCESSED; 297 return pte; 298 } 299 300 static inline pte_t pte_mknocache(pte_t pte) 301 { 302 pte_val(pte) |= 0x80 | (pte_val(pte) & ~0x40); 303 return pte; 304 } 305 306 static inline pte_t pte_mkcache(pte_t pte) 307 { 308 pte_val(pte) &= ~CF_PAGE_NOCACHE; 309 return pte; 310 } 311 312 #define swapper_pg_dir kernel_pg_dir 313 extern pgd_t kernel_pg_dir[PTRS_PER_PGD]; 314 315 /* 316 * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) 317 */ 318 #define __swp_type(x) ((x).val & 0xFF) 319 #define __swp_offset(x) ((x).val >> 11) 320 #define __swp_entry(typ, off) ((swp_entry_t) { (typ) | \ 321 (off << 11) }) 322 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 323 #define __swp_entry_to_pte(x) (__pte((x).val)) 324 325 #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) 326 327 #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) 328 #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) 329 330 #endif /* !__ASSEMBLY__ */ 331 #endif /* _MCF_PGTABLE_H */ 332