1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * pgtable.h: SpitFire page table operations. 4 * 5 * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu) 6 * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 7 */ 8 9 #ifndef _SPARC64_PGTABLE_H 10 #define _SPARC64_PGTABLE_H 11 12 /* This file contains the functions and defines necessary to modify and use 13 * the SpitFire page tables. 14 */ 15 16 #include <asm-generic/5level-fixup.h> 17 #include <linux/compiler.h> 18 #include <linux/const.h> 19 #include <asm/types.h> 20 #include <asm/spitfire.h> 21 #include <asm/asi.h> 22 #include <asm/adi.h> 23 #include <asm/page.h> 24 #include <asm/processor.h> 25 26 /* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB). 27 * The page copy blockops can use 0x6000000 to 0x8000000. 28 * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range. 29 * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range. 30 * The PROM resides in an area spanning 0xf0000000 to 0x100000000. 31 * The vmalloc area spans 0x100000000 to 0x200000000. 32 * Since modules need to be in the lowest 32-bits of the address space, 33 * we place them right before the OBP area from 0x10000000 to 0xf0000000. 34 * There is a single static kernel PMD which maps from 0x0 to address 35 * 0x400000000. 36 */ 37 #define TLBTEMP_BASE _AC(0x0000000006000000,UL) 38 #define TSBMAP_8K_BASE _AC(0x0000000008000000,UL) 39 #define TSBMAP_4M_BASE _AC(0x0000000008400000,UL) 40 #define MODULES_VADDR _AC(0x0000000010000000,UL) 41 #define MODULES_LEN _AC(0x00000000e0000000,UL) 42 #define MODULES_END _AC(0x00000000f0000000,UL) 43 #define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL) 44 #define HI_OBP_ADDRESS _AC(0x0000000100000000,UL) 45 #define VMALLOC_START _AC(0x0000000100000000,UL) 46 #define VMEMMAP_BASE VMALLOC_END 47 48 /* PMD_SHIFT determines the size of the area a second-level page 49 * table can map 50 */ 51 #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) 52 #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) 53 #define PMD_MASK (~(PMD_SIZE-1)) 54 #define PMD_BITS (PAGE_SHIFT - 3) 55 56 /* PUD_SHIFT determines the size of the area a third-level page 57 * table can map 58 */ 59 #define PUD_SHIFT (PMD_SHIFT + PMD_BITS) 60 #define PUD_SIZE (_AC(1,UL) << PUD_SHIFT) 61 #define PUD_MASK (~(PUD_SIZE-1)) 62 #define PUD_BITS (PAGE_SHIFT - 3) 63 64 /* PGDIR_SHIFT determines what a fourth-level page table entry can map */ 65 #define PGDIR_SHIFT (PUD_SHIFT + PUD_BITS) 66 #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) 67 #define PGDIR_MASK (~(PGDIR_SIZE-1)) 68 #define PGDIR_BITS (PAGE_SHIFT - 3) 69 70 #if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS) 71 #error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support 72 #endif 73 74 #if (PGDIR_SHIFT + PGDIR_BITS) != 53 75 #error Page table parameters do not cover virtual address space properly. 76 #endif 77 78 #if (PMD_SHIFT != HPAGE_SHIFT) 79 #error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages. 80 #endif 81 82 #ifndef __ASSEMBLY__ 83 84 extern unsigned long VMALLOC_END; 85 86 #define vmemmap ((struct page *)VMEMMAP_BASE) 87 88 #include <linux/sched.h> 89 90 bool kern_addr_valid(unsigned long addr); 91 92 /* Entries per page directory level. */ 93 #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) 94 #define PTRS_PER_PMD (1UL << PMD_BITS) 95 #define PTRS_PER_PUD (1UL << PUD_BITS) 96 #define PTRS_PER_PGD (1UL << PGDIR_BITS) 97 98 /* Kernel has a separate 44bit address space. */ 99 #define FIRST_USER_ADDRESS 0UL 100 101 #define pmd_ERROR(e) \ 102 pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n", \ 103 __FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0)) 104 #define pud_ERROR(e) \ 105 pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n", \ 106 __FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0)) 107 #define pgd_ERROR(e) \ 108 pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n", \ 109 __FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0)) 110 111 #endif /* !(__ASSEMBLY__) */ 112 113 /* PTE bits which are the same in SUN4U and SUN4V format. */ 114 #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ 115 #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/ 116 #define _PAGE_SPECIAL _AC(0x0200000000000000,UL) /* Special page */ 117 #define _PAGE_PMD_HUGE _AC(0x0100000000000000,UL) /* Huge page */ 118 #define _PAGE_PUD_HUGE _PAGE_PMD_HUGE 119 120 /* SUN4U pte bits... */ 121 #define _PAGE_SZ4MB_4U _AC(0x6000000000000000,UL) /* 4MB Page */ 122 #define _PAGE_SZ512K_4U _AC(0x4000000000000000,UL) /* 512K Page */ 123 #define _PAGE_SZ64K_4U _AC(0x2000000000000000,UL) /* 64K Page */ 124 #define _PAGE_SZ8K_4U _AC(0x0000000000000000,UL) /* 8K Page */ 125 #define _PAGE_NFO_4U _AC(0x1000000000000000,UL) /* No Fault Only */ 126 #define _PAGE_IE_4U _AC(0x0800000000000000,UL) /* Invert Endianness */ 127 #define _PAGE_SOFT2_4U _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ 128 #define _PAGE_SPECIAL_4U _AC(0x0200000000000000,UL) /* Special page */ 129 #define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page */ 130 #define _PAGE_RES1_4U _AC(0x0002000000000000,UL) /* Reserved */ 131 #define _PAGE_SZ32MB_4U _AC(0x0001000000000000,UL) /* (Panther) 32MB page */ 132 #define _PAGE_SZ256MB_4U _AC(0x2001000000000000,UL) /* (Panther) 256MB page */ 133 #define _PAGE_SZALL_4U _AC(0x6001000000000000,UL) /* All pgsz bits */ 134 #define _PAGE_SN_4U _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */ 135 #define _PAGE_RES2_4U _AC(0x0000780000000000,UL) /* Reserved */ 136 #define _PAGE_PADDR_4U _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13] */ 137 #define _PAGE_SOFT_4U _AC(0x0000000000001F80,UL) /* Software bits: */ 138 #define _PAGE_EXEC_4U _AC(0x0000000000001000,UL) /* Executable SW bit */ 139 #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty) */ 140 #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd) */ 141 #define _PAGE_READ_4U _AC(0x0000000000000200,UL) /* Readable SW Bit */ 142 #define _PAGE_WRITE_4U _AC(0x0000000000000100,UL) /* Writable SW Bit */ 143 #define _PAGE_PRESENT_4U _AC(0x0000000000000080,UL) /* Present */ 144 #define _PAGE_L_4U _AC(0x0000000000000040,UL) /* Locked TTE */ 145 #define _PAGE_CP_4U _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */ 146 #define _PAGE_CV_4U _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */ 147 #define _PAGE_E_4U _AC(0x0000000000000008,UL) /* side-Effect */ 148 #define _PAGE_P_4U _AC(0x0000000000000004,UL) /* Privileged Page */ 149 #define _PAGE_W_4U _AC(0x0000000000000002,UL) /* Writable */ 150 151 /* SUN4V pte bits... */ 152 #define _PAGE_NFO_4V _AC(0x4000000000000000,UL) /* No Fault Only */ 153 #define _PAGE_SOFT2_4V _AC(0x3F00000000000000,UL) /* Software bits, set 2 */ 154 #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty) */ 155 #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd) */ 156 #define _PAGE_READ_4V _AC(0x0800000000000000,UL) /* Readable SW Bit */ 157 #define _PAGE_WRITE_4V _AC(0x0400000000000000,UL) /* Writable SW Bit */ 158 #define _PAGE_SPECIAL_4V _AC(0x0200000000000000,UL) /* Special page */ 159 #define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page */ 160 #define _PAGE_PADDR_4V _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13] */ 161 #define _PAGE_IE_4V _AC(0x0000000000001000,UL) /* Invert Endianness */ 162 #define _PAGE_E_4V _AC(0x0000000000000800,UL) /* side-Effect */ 163 #define _PAGE_CP_4V _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */ 164 #define _PAGE_CV_4V _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */ 165 /* Bit 9 is used to enable MCD corruption detection instead on M7 */ 166 #define _PAGE_MCD_4V _AC(0x0000000000000200,UL) /* Memory Corruption */ 167 #define _PAGE_P_4V _AC(0x0000000000000100,UL) /* Privileged Page */ 168 #define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */ 169 #define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */ 170 #define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */ 171 #define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */ 172 #define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */ 173 #define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */ 174 #define _PAGE_SZ2GB_4V _AC(0x0000000000000006,UL) /* 2GB Page */ 175 #define _PAGE_SZ256MB_4V _AC(0x0000000000000005,UL) /* 256MB Page */ 176 #define _PAGE_SZ32MB_4V _AC(0x0000000000000004,UL) /* 32MB Page */ 177 #define _PAGE_SZ4MB_4V _AC(0x0000000000000003,UL) /* 4MB Page */ 178 #define _PAGE_SZ512K_4V _AC(0x0000000000000002,UL) /* 512K Page */ 179 #define _PAGE_SZ64K_4V _AC(0x0000000000000001,UL) /* 64K Page */ 180 #define _PAGE_SZ8K_4V _AC(0x0000000000000000,UL) /* 8K Page */ 181 #define _PAGE_SZALL_4V _AC(0x0000000000000007,UL) /* All pgsz bits */ 182 183 #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U 184 #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V 185 186 #if REAL_HPAGE_SHIFT != 22 187 #error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up 188 #endif 189 190 #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U 191 #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V 192 193 /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ 194 #define __P000 __pgprot(0) 195 #define __P001 __pgprot(0) 196 #define __P010 __pgprot(0) 197 #define __P011 __pgprot(0) 198 #define __P100 __pgprot(0) 199 #define __P101 __pgprot(0) 200 #define __P110 __pgprot(0) 201 #define __P111 __pgprot(0) 202 203 #define __S000 __pgprot(0) 204 #define __S001 __pgprot(0) 205 #define __S010 __pgprot(0) 206 #define __S011 __pgprot(0) 207 #define __S100 __pgprot(0) 208 #define __S101 __pgprot(0) 209 #define __S110 __pgprot(0) 210 #define __S111 __pgprot(0) 211 212 #ifndef __ASSEMBLY__ 213 214 pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long); 215 216 unsigned long pte_sz_bits(unsigned long size); 217 218 extern pgprot_t PAGE_KERNEL; 219 extern pgprot_t PAGE_KERNEL_LOCKED; 220 extern pgprot_t PAGE_COPY; 221 extern pgprot_t PAGE_SHARED; 222 223 /* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */ 224 extern unsigned long _PAGE_IE; 225 extern unsigned long _PAGE_E; 226 extern unsigned long _PAGE_CACHE; 227 228 extern unsigned long pg_iobits; 229 extern unsigned long _PAGE_ALL_SZ_BITS; 230 231 extern struct page *mem_map_zero; 232 #define ZERO_PAGE(vaddr) (mem_map_zero) 233 234 /* PFNs are real physical page numbers. However, mem_map only begins to record 235 * per-page information starting at pfn_base. This is to handle systems where 236 * the first physical page in the machine is at some huge physical address, 237 * such as 4GB. This is common on a partitioned E10000, for example. 238 */ 239 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot) 240 { 241 unsigned long paddr = pfn << PAGE_SHIFT; 242 243 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL); 244 return __pte(paddr | pgprot_val(prot)); 245 } 246 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 247 248 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 249 static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) 250 { 251 pte_t pte = pfn_pte(page_nr, pgprot); 252 253 return __pmd(pte_val(pte)); 254 } 255 #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) 256 #endif 257 258 /* This one can be done with two shifts. */ 259 static inline unsigned long pte_pfn(pte_t pte) 260 { 261 unsigned long ret; 262 263 __asm__ __volatile__( 264 "\n661: sllx %1, %2, %0\n" 265 " srlx %0, %3, %0\n" 266 " .section .sun4v_2insn_patch, \"ax\"\n" 267 " .word 661b\n" 268 " sllx %1, %4, %0\n" 269 " srlx %0, %5, %0\n" 270 " .previous\n" 271 : "=r" (ret) 272 : "r" (pte_val(pte)), 273 "i" (21), "i" (21 + PAGE_SHIFT), 274 "i" (8), "i" (8 + PAGE_SHIFT)); 275 276 return ret; 277 } 278 #define pte_page(x) pfn_to_page(pte_pfn(x)) 279 280 static inline pte_t pte_modify(pte_t pte, pgprot_t prot) 281 { 282 unsigned long mask, tmp; 283 284 /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7) 285 * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8) 286 * 287 * Even if we use negation tricks the result is still a 6 288 * instruction sequence, so don't try to play fancy and just 289 * do the most straightforward implementation. 290 * 291 * Note: We encode this into 3 sun4v 2-insn patch sequences. 292 */ 293 294 BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL); 295 __asm__ __volatile__( 296 "\n661: sethi %%uhi(%2), %1\n" 297 " sethi %%hi(%2), %0\n" 298 "\n662: or %1, %%ulo(%2), %1\n" 299 " or %0, %%lo(%2), %0\n" 300 "\n663: sllx %1, 32, %1\n" 301 " or %0, %1, %0\n" 302 " .section .sun4v_2insn_patch, \"ax\"\n" 303 " .word 661b\n" 304 " sethi %%uhi(%3), %1\n" 305 " sethi %%hi(%3), %0\n" 306 " .word 662b\n" 307 " or %1, %%ulo(%3), %1\n" 308 " or %0, %%lo(%3), %0\n" 309 " .word 663b\n" 310 " sllx %1, 32, %1\n" 311 " or %0, %1, %0\n" 312 " .previous\n" 313 " .section .sun_m7_2insn_patch, \"ax\"\n" 314 " .word 661b\n" 315 " sethi %%uhi(%4), %1\n" 316 " sethi %%hi(%4), %0\n" 317 " .word 662b\n" 318 " or %1, %%ulo(%4), %1\n" 319 " or %0, %%lo(%4), %0\n" 320 " .word 663b\n" 321 " sllx %1, 32, %1\n" 322 " or %0, %1, %0\n" 323 " .previous\n" 324 : "=r" (mask), "=r" (tmp) 325 : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U | 326 _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | 327 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U), 328 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | 329 _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | 330 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V), 331 "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V | 332 _PAGE_CP_4V | _PAGE_E_4V | 333 _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V)); 334 335 return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask)); 336 } 337 338 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 339 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) 340 { 341 pte_t pte = __pte(pmd_val(pmd)); 342 343 pte = pte_modify(pte, newprot); 344 345 return __pmd(pte_val(pte)); 346 } 347 #endif 348 349 static inline pgprot_t pgprot_noncached(pgprot_t prot) 350 { 351 unsigned long val = pgprot_val(prot); 352 353 __asm__ __volatile__( 354 "\n661: andn %0, %2, %0\n" 355 " or %0, %3, %0\n" 356 " .section .sun4v_2insn_patch, \"ax\"\n" 357 " .word 661b\n" 358 " andn %0, %4, %0\n" 359 " or %0, %5, %0\n" 360 " .previous\n" 361 " .section .sun_m7_2insn_patch, \"ax\"\n" 362 " .word 661b\n" 363 " andn %0, %6, %0\n" 364 " or %0, %5, %0\n" 365 " .previous\n" 366 : "=r" (val) 367 : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U), 368 "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V), 369 "i" (_PAGE_CP_4V)); 370 371 return __pgprot(val); 372 } 373 /* Various pieces of code check for platform support by ifdef testing 374 * on "pgprot_noncached". That's broken and should be fixed, but for 375 * now... 376 */ 377 #define pgprot_noncached pgprot_noncached 378 379 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) 380 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma, 381 struct page *page, int writable); 382 #define arch_make_huge_pte arch_make_huge_pte 383 static inline unsigned long __pte_default_huge_mask(void) 384 { 385 unsigned long mask; 386 387 __asm__ __volatile__( 388 "\n661: sethi %%uhi(%1), %0\n" 389 " sllx %0, 32, %0\n" 390 " .section .sun4v_2insn_patch, \"ax\"\n" 391 " .word 661b\n" 392 " mov %2, %0\n" 393 " nop\n" 394 " .previous\n" 395 : "=r" (mask) 396 : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V)); 397 398 return mask; 399 } 400 401 static inline pte_t pte_mkhuge(pte_t pte) 402 { 403 return __pte(pte_val(pte) | __pte_default_huge_mask()); 404 } 405 406 static inline bool is_default_hugetlb_pte(pte_t pte) 407 { 408 unsigned long mask = __pte_default_huge_mask(); 409 410 return (pte_val(pte) & mask) == mask; 411 } 412 413 static inline bool is_hugetlb_pmd(pmd_t pmd) 414 { 415 return !!(pmd_val(pmd) & _PAGE_PMD_HUGE); 416 } 417 418 static inline bool is_hugetlb_pud(pud_t pud) 419 { 420 return !!(pud_val(pud) & _PAGE_PUD_HUGE); 421 } 422 423 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 424 static inline pmd_t pmd_mkhuge(pmd_t pmd) 425 { 426 pte_t pte = __pte(pmd_val(pmd)); 427 428 pte = pte_mkhuge(pte); 429 pte_val(pte) |= _PAGE_PMD_HUGE; 430 431 return __pmd(pte_val(pte)); 432 } 433 #endif 434 #else 435 static inline bool is_hugetlb_pte(pte_t pte) 436 { 437 return false; 438 } 439 #endif 440 441 static inline pte_t pte_mkdirty(pte_t pte) 442 { 443 unsigned long val = pte_val(pte), tmp; 444 445 __asm__ __volatile__( 446 "\n661: or %0, %3, %0\n" 447 " nop\n" 448 "\n662: nop\n" 449 " nop\n" 450 " .section .sun4v_2insn_patch, \"ax\"\n" 451 " .word 661b\n" 452 " sethi %%uhi(%4), %1\n" 453 " sllx %1, 32, %1\n" 454 " .word 662b\n" 455 " or %1, %%lo(%4), %1\n" 456 " or %0, %1, %0\n" 457 " .previous\n" 458 : "=r" (val), "=r" (tmp) 459 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), 460 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); 461 462 return __pte(val); 463 } 464 465 static inline pte_t pte_mkclean(pte_t pte) 466 { 467 unsigned long val = pte_val(pte), tmp; 468 469 __asm__ __volatile__( 470 "\n661: andn %0, %3, %0\n" 471 " nop\n" 472 "\n662: nop\n" 473 " nop\n" 474 " .section .sun4v_2insn_patch, \"ax\"\n" 475 " .word 661b\n" 476 " sethi %%uhi(%4), %1\n" 477 " sllx %1, 32, %1\n" 478 " .word 662b\n" 479 " or %1, %%lo(%4), %1\n" 480 " andn %0, %1, %0\n" 481 " .previous\n" 482 : "=r" (val), "=r" (tmp) 483 : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U), 484 "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V)); 485 486 return __pte(val); 487 } 488 489 static inline pte_t pte_mkwrite(pte_t pte) 490 { 491 unsigned long val = pte_val(pte), mask; 492 493 __asm__ __volatile__( 494 "\n661: mov %1, %0\n" 495 " nop\n" 496 " .section .sun4v_2insn_patch, \"ax\"\n" 497 " .word 661b\n" 498 " sethi %%uhi(%2), %0\n" 499 " sllx %0, 32, %0\n" 500 " .previous\n" 501 : "=r" (mask) 502 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); 503 504 return __pte(val | mask); 505 } 506 507 static inline pte_t pte_wrprotect(pte_t pte) 508 { 509 unsigned long val = pte_val(pte), tmp; 510 511 __asm__ __volatile__( 512 "\n661: andn %0, %3, %0\n" 513 " nop\n" 514 "\n662: nop\n" 515 " nop\n" 516 " .section .sun4v_2insn_patch, \"ax\"\n" 517 " .word 661b\n" 518 " sethi %%uhi(%4), %1\n" 519 " sllx %1, 32, %1\n" 520 " .word 662b\n" 521 " or %1, %%lo(%4), %1\n" 522 " andn %0, %1, %0\n" 523 " .previous\n" 524 : "=r" (val), "=r" (tmp) 525 : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U), 526 "i" (_PAGE_WRITE_4V | _PAGE_W_4V)); 527 528 return __pte(val); 529 } 530 531 static inline pte_t pte_mkold(pte_t pte) 532 { 533 unsigned long mask; 534 535 __asm__ __volatile__( 536 "\n661: mov %1, %0\n" 537 " nop\n" 538 " .section .sun4v_2insn_patch, \"ax\"\n" 539 " .word 661b\n" 540 " sethi %%uhi(%2), %0\n" 541 " sllx %0, 32, %0\n" 542 " .previous\n" 543 : "=r" (mask) 544 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); 545 546 mask |= _PAGE_R; 547 548 return __pte(pte_val(pte) & ~mask); 549 } 550 551 static inline pte_t pte_mkyoung(pte_t pte) 552 { 553 unsigned long mask; 554 555 __asm__ __volatile__( 556 "\n661: mov %1, %0\n" 557 " nop\n" 558 " .section .sun4v_2insn_patch, \"ax\"\n" 559 " .word 661b\n" 560 " sethi %%uhi(%2), %0\n" 561 " sllx %0, 32, %0\n" 562 " .previous\n" 563 : "=r" (mask) 564 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); 565 566 mask |= _PAGE_R; 567 568 return __pte(pte_val(pte) | mask); 569 } 570 571 static inline pte_t pte_mkspecial(pte_t pte) 572 { 573 pte_val(pte) |= _PAGE_SPECIAL; 574 return pte; 575 } 576 577 static inline pte_t pte_mkmcd(pte_t pte) 578 { 579 pte_val(pte) |= _PAGE_MCD_4V; 580 return pte; 581 } 582 583 static inline pte_t pte_mknotmcd(pte_t pte) 584 { 585 pte_val(pte) &= ~_PAGE_MCD_4V; 586 return pte; 587 } 588 589 static inline unsigned long pte_young(pte_t pte) 590 { 591 unsigned long mask; 592 593 __asm__ __volatile__( 594 "\n661: mov %1, %0\n" 595 " nop\n" 596 " .section .sun4v_2insn_patch, \"ax\"\n" 597 " .word 661b\n" 598 " sethi %%uhi(%2), %0\n" 599 " sllx %0, 32, %0\n" 600 " .previous\n" 601 : "=r" (mask) 602 : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V)); 603 604 return (pte_val(pte) & mask); 605 } 606 607 static inline unsigned long pte_dirty(pte_t pte) 608 { 609 unsigned long mask; 610 611 __asm__ __volatile__( 612 "\n661: mov %1, %0\n" 613 " nop\n" 614 " .section .sun4v_2insn_patch, \"ax\"\n" 615 " .word 661b\n" 616 " sethi %%uhi(%2), %0\n" 617 " sllx %0, 32, %0\n" 618 " .previous\n" 619 : "=r" (mask) 620 : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V)); 621 622 return (pte_val(pte) & mask); 623 } 624 625 static inline unsigned long pte_write(pte_t pte) 626 { 627 unsigned long mask; 628 629 __asm__ __volatile__( 630 "\n661: mov %1, %0\n" 631 " nop\n" 632 " .section .sun4v_2insn_patch, \"ax\"\n" 633 " .word 661b\n" 634 " sethi %%uhi(%2), %0\n" 635 " sllx %0, 32, %0\n" 636 " .previous\n" 637 : "=r" (mask) 638 : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V)); 639 640 return (pte_val(pte) & mask); 641 } 642 643 static inline unsigned long pte_exec(pte_t pte) 644 { 645 unsigned long mask; 646 647 __asm__ __volatile__( 648 "\n661: sethi %%hi(%1), %0\n" 649 " .section .sun4v_1insn_patch, \"ax\"\n" 650 " .word 661b\n" 651 " mov %2, %0\n" 652 " .previous\n" 653 : "=r" (mask) 654 : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V)); 655 656 return (pte_val(pte) & mask); 657 } 658 659 static inline unsigned long pte_present(pte_t pte) 660 { 661 unsigned long val = pte_val(pte); 662 663 __asm__ __volatile__( 664 "\n661: and %0, %2, %0\n" 665 " .section .sun4v_1insn_patch, \"ax\"\n" 666 " .word 661b\n" 667 " and %0, %3, %0\n" 668 " .previous\n" 669 : "=r" (val) 670 : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V)); 671 672 return val; 673 } 674 675 #define pte_accessible pte_accessible 676 static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a) 677 { 678 return pte_val(a) & _PAGE_VALID; 679 } 680 681 static inline unsigned long pte_special(pte_t pte) 682 { 683 return pte_val(pte) & _PAGE_SPECIAL; 684 } 685 686 static inline unsigned long pmd_large(pmd_t pmd) 687 { 688 pte_t pte = __pte(pmd_val(pmd)); 689 690 return pte_val(pte) & _PAGE_PMD_HUGE; 691 } 692 693 static inline unsigned long pmd_pfn(pmd_t pmd) 694 { 695 pte_t pte = __pte(pmd_val(pmd)); 696 697 return pte_pfn(pte); 698 } 699 700 #define pmd_write pmd_write 701 static inline unsigned long pmd_write(pmd_t pmd) 702 { 703 pte_t pte = __pte(pmd_val(pmd)); 704 705 return pte_write(pte); 706 } 707 708 #define pud_write(pud) pte_write(__pte(pud_val(pud))) 709 710 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 711 static inline unsigned long pmd_dirty(pmd_t pmd) 712 { 713 pte_t pte = __pte(pmd_val(pmd)); 714 715 return pte_dirty(pte); 716 } 717 718 static inline unsigned long pmd_young(pmd_t pmd) 719 { 720 pte_t pte = __pte(pmd_val(pmd)); 721 722 return pte_young(pte); 723 } 724 725 static inline unsigned long pmd_trans_huge(pmd_t pmd) 726 { 727 pte_t pte = __pte(pmd_val(pmd)); 728 729 return pte_val(pte) & _PAGE_PMD_HUGE; 730 } 731 732 static inline pmd_t pmd_mkold(pmd_t pmd) 733 { 734 pte_t pte = __pte(pmd_val(pmd)); 735 736 pte = pte_mkold(pte); 737 738 return __pmd(pte_val(pte)); 739 } 740 741 static inline pmd_t pmd_wrprotect(pmd_t pmd) 742 { 743 pte_t pte = __pte(pmd_val(pmd)); 744 745 pte = pte_wrprotect(pte); 746 747 return __pmd(pte_val(pte)); 748 } 749 750 static inline pmd_t pmd_mkdirty(pmd_t pmd) 751 { 752 pte_t pte = __pte(pmd_val(pmd)); 753 754 pte = pte_mkdirty(pte); 755 756 return __pmd(pte_val(pte)); 757 } 758 759 static inline pmd_t pmd_mkclean(pmd_t pmd) 760 { 761 pte_t pte = __pte(pmd_val(pmd)); 762 763 pte = pte_mkclean(pte); 764 765 return __pmd(pte_val(pte)); 766 } 767 768 static inline pmd_t pmd_mkyoung(pmd_t pmd) 769 { 770 pte_t pte = __pte(pmd_val(pmd)); 771 772 pte = pte_mkyoung(pte); 773 774 return __pmd(pte_val(pte)); 775 } 776 777 static inline pmd_t pmd_mkwrite(pmd_t pmd) 778 { 779 pte_t pte = __pte(pmd_val(pmd)); 780 781 pte = pte_mkwrite(pte); 782 783 return __pmd(pte_val(pte)); 784 } 785 786 static inline pgprot_t pmd_pgprot(pmd_t entry) 787 { 788 unsigned long val = pmd_val(entry); 789 790 return __pgprot(val); 791 } 792 #endif 793 794 static inline int pmd_present(pmd_t pmd) 795 { 796 return pmd_val(pmd) != 0UL; 797 } 798 799 #define pmd_none(pmd) (!pmd_val(pmd)) 800 801 /* pmd_bad() is only called on non-trans-huge PMDs. Our encoding is 802 * very simple, it's just the physical address. PTE tables are of 803 * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and 804 * the top bits outside of the range of any physical address size we 805 * support are clear as well. We also validate the physical itself. 806 */ 807 #define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK) 808 809 #define pud_none(pud) (!pud_val(pud)) 810 811 #define pud_bad(pud) (pud_val(pud) & ~PAGE_MASK) 812 813 #define pgd_none(pgd) (!pgd_val(pgd)) 814 815 #define pgd_bad(pgd) (pgd_val(pgd) & ~PAGE_MASK) 816 817 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 818 void set_pmd_at(struct mm_struct *mm, unsigned long addr, 819 pmd_t *pmdp, pmd_t pmd); 820 #else 821 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, 822 pmd_t *pmdp, pmd_t pmd) 823 { 824 *pmdp = pmd; 825 } 826 #endif 827 828 static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) 829 { 830 unsigned long val = __pa((unsigned long) (ptep)); 831 832 pmd_val(*pmdp) = val; 833 } 834 835 #define pud_set(pudp, pmdp) \ 836 (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)))) 837 static inline unsigned long __pmd_page(pmd_t pmd) 838 { 839 pte_t pte = __pte(pmd_val(pmd)); 840 unsigned long pfn; 841 842 pfn = pte_pfn(pte); 843 844 return ((unsigned long) __va(pfn << PAGE_SHIFT)); 845 } 846 847 static inline unsigned long pud_page_vaddr(pud_t pud) 848 { 849 pte_t pte = __pte(pud_val(pud)); 850 unsigned long pfn; 851 852 pfn = pte_pfn(pte); 853 854 return ((unsigned long) __va(pfn << PAGE_SHIFT)); 855 } 856 857 #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) 858 #define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud)) 859 #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL) 860 #define pud_present(pud) (pud_val(pud) != 0U) 861 #define pud_clear(pudp) (pud_val(*(pudp)) = 0UL) 862 #define pgd_page_vaddr(pgd) \ 863 ((unsigned long) __va(pgd_val(pgd))) 864 #define pgd_present(pgd) (pgd_val(pgd) != 0U) 865 #define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL) 866 867 static inline unsigned long pud_large(pud_t pud) 868 { 869 pte_t pte = __pte(pud_val(pud)); 870 871 return pte_val(pte) & _PAGE_PMD_HUGE; 872 } 873 874 static inline unsigned long pud_pfn(pud_t pud) 875 { 876 pte_t pte = __pte(pud_val(pud)); 877 878 return pte_pfn(pte); 879 } 880 881 /* Same in both SUN4V and SUN4U. */ 882 #define pte_none(pte) (!pte_val(pte)) 883 884 #define pgd_set(pgdp, pudp) \ 885 (pgd_val(*(pgdp)) = (__pa((unsigned long) (pudp)))) 886 887 /* to find an entry in a page-table-directory. */ 888 #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) 889 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 890 891 /* to find an entry in a kernel page-table-directory */ 892 #define pgd_offset_k(address) pgd_offset(&init_mm, address) 893 894 /* Find an entry in the third-level page table.. */ 895 #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)) 896 #define pud_offset(pgdp, address) \ 897 ((pud_t *) pgd_page_vaddr(*(pgdp)) + pud_index(address)) 898 899 /* Find an entry in the second-level page table.. */ 900 #define pmd_offset(pudp, address) \ 901 ((pmd_t *) pud_page_vaddr(*(pudp)) + \ 902 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))) 903 904 /* Find an entry in the third-level page table.. */ 905 #define pte_index(dir, address) \ 906 ((pte_t *) __pmd_page(*(dir)) + \ 907 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) 908 #define pte_offset_kernel pte_index 909 #define pte_offset_map pte_index 910 #define pte_unmap(pte) do { } while (0) 911 912 /* We cannot include <linux/mm_types.h> at this point yet: */ 913 extern struct mm_struct init_mm; 914 915 /* Actual page table PTE updates. */ 916 void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, 917 pte_t *ptep, pte_t orig, int fullmm, 918 unsigned int hugepage_shift); 919 920 static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, 921 pte_t *ptep, pte_t orig, int fullmm, 922 unsigned int hugepage_shift) 923 { 924 /* It is more efficient to let flush_tlb_kernel_range() 925 * handle init_mm tlb flushes. 926 * 927 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U 928 * and SUN4V pte layout, so this inline test is fine. 929 */ 930 if (likely(mm != &init_mm) && pte_accessible(mm, orig)) 931 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift); 932 } 933 934 #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR 935 static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, 936 unsigned long addr, 937 pmd_t *pmdp) 938 { 939 pmd_t pmd = *pmdp; 940 set_pmd_at(mm, addr, pmdp, __pmd(0UL)); 941 return pmd; 942 } 943 944 static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, 945 pte_t *ptep, pte_t pte, int fullmm) 946 { 947 pte_t orig = *ptep; 948 949 *ptep = pte; 950 maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT); 951 } 952 953 #define set_pte_at(mm,addr,ptep,pte) \ 954 __set_pte_at((mm), (addr), (ptep), (pte), 0) 955 956 #define pte_clear(mm,addr,ptep) \ 957 set_pte_at((mm), (addr), (ptep), __pte(0UL)) 958 959 #define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL 960 #define pte_clear_not_present_full(mm,addr,ptep,fullmm) \ 961 __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm)) 962 963 #ifdef DCACHE_ALIASING_POSSIBLE 964 #define __HAVE_ARCH_MOVE_PTE 965 #define move_pte(pte, prot, old_addr, new_addr) \ 966 ({ \ 967 pte_t newpte = (pte); \ 968 if (tlb_type != hypervisor && pte_present(pte)) { \ 969 unsigned long this_pfn = pte_pfn(pte); \ 970 \ 971 if (pfn_valid(this_pfn) && \ 972 (((old_addr) ^ (new_addr)) & (1 << 13))) \ 973 flush_dcache_page_all(current->mm, \ 974 pfn_to_page(this_pfn)); \ 975 } \ 976 newpte; \ 977 }) 978 #endif 979 980 extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; 981 982 void paging_init(void); 983 unsigned long find_ecache_flush_span(unsigned long size); 984 985 struct seq_file; 986 void mmu_info(struct seq_file *); 987 988 struct vm_area_struct; 989 void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); 990 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 991 void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr, 992 pmd_t *pmd); 993 994 #define __HAVE_ARCH_PMDP_INVALIDATE 995 extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, 996 pmd_t *pmdp); 997 998 #define __HAVE_ARCH_PGTABLE_DEPOSIT 999 void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, 1000 pgtable_t pgtable); 1001 1002 #define __HAVE_ARCH_PGTABLE_WITHDRAW 1003 pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp); 1004 #endif 1005 1006 /* Encode and de-code a swap entry */ 1007 #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) 1008 #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) 1009 #define __swp_entry(type, offset) \ 1010 ( (swp_entry_t) \ 1011 { \ 1012 (((long)(type) << PAGE_SHIFT) | \ 1013 ((long)(offset) << (PAGE_SHIFT + 8UL))) \ 1014 } ) 1015 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) 1016 #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) 1017 1018 int page_in_phys_avail(unsigned long paddr); 1019 1020 /* 1021 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in 1022 * its high 4 bits. These macros/functions put it there or get it from there. 1023 */ 1024 #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) 1025 #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) 1026 #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL) 1027 1028 int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long, 1029 unsigned long, pgprot_t); 1030 1031 void adi_restore_tags(struct mm_struct *mm, struct vm_area_struct *vma, 1032 unsigned long addr, pte_t pte); 1033 1034 int adi_save_tags(struct mm_struct *mm, struct vm_area_struct *vma, 1035 unsigned long addr, pte_t oldpte); 1036 1037 #define __HAVE_ARCH_DO_SWAP_PAGE 1038 static inline void arch_do_swap_page(struct mm_struct *mm, 1039 struct vm_area_struct *vma, 1040 unsigned long addr, 1041 pte_t pte, pte_t oldpte) 1042 { 1043 /* If this is a new page being mapped in, there can be no 1044 * ADI tags stored away for this page. Skip looking for 1045 * stored tags 1046 */ 1047 if (pte_none(oldpte)) 1048 return; 1049 1050 if (adi_state.enabled && (pte_val(pte) & _PAGE_MCD_4V)) 1051 adi_restore_tags(mm, vma, addr, pte); 1052 } 1053 1054 #define __HAVE_ARCH_UNMAP_ONE 1055 static inline int arch_unmap_one(struct mm_struct *mm, 1056 struct vm_area_struct *vma, 1057 unsigned long addr, pte_t oldpte) 1058 { 1059 if (adi_state.enabled && (pte_val(oldpte) & _PAGE_MCD_4V)) 1060 return adi_save_tags(mm, vma, addr, oldpte); 1061 return 0; 1062 } 1063 1064 static inline int io_remap_pfn_range(struct vm_area_struct *vma, 1065 unsigned long from, unsigned long pfn, 1066 unsigned long size, pgprot_t prot) 1067 { 1068 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; 1069 int space = GET_IOSPACE(pfn); 1070 unsigned long phys_base; 1071 1072 phys_base = offset | (((unsigned long) space) << 32UL); 1073 1074 return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot); 1075 } 1076 #define io_remap_pfn_range io_remap_pfn_range 1077 1078 #include <asm/tlbflush.h> 1079 #include <asm-generic/pgtable.h> 1080 1081 /* We provide our own get_unmapped_area to cope with VA holes and 1082 * SHM area cache aliasing for userland. 1083 */ 1084 #define HAVE_ARCH_UNMAPPED_AREA 1085 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 1086 1087 /* We provide a special get_unmapped_area for framebuffer mmaps to try and use 1088 * the largest alignment possible such that larget PTEs can be used. 1089 */ 1090 unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, 1091 unsigned long, unsigned long, 1092 unsigned long); 1093 #define HAVE_ARCH_FB_UNMAPPED_AREA 1094 1095 void pgtable_cache_init(void); 1096 void sun4v_register_fault_status(void); 1097 void sun4v_ktsb_register(void); 1098 void __init cheetah_ecache_flush_init(void); 1099 void sun4v_patch_tlb_handlers(void); 1100 1101 extern unsigned long cmdline_memory_size; 1102 1103 asmlinkage void do_sparc64_fault(struct pt_regs *regs); 1104 1105 #endif /* !(__ASSEMBLY__) */ 1106 1107 #endif /* !(_SPARC64_PGTABLE_H) */ 1108