arch/sparc/include/asm/pgtable_64.h

   1 /*
   2  * pgtable.h: SpitFire page table operations.
   3  *
   4  * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
   5  * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  */
   7
   8 #ifndef _SPARC64_PGTABLE_H
   9 #define _SPARC64_PGTABLE_H
  10
  11 /* This file contains the functions and defines necessary to modify and use
  12  * the SpitFire page tables.
  13  */
  14
  15 #include <asm-generic/pgtable-nopud.h>
  16
  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/system.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 TSB is mapped in the 0x8000000 to 0xa000000 range.
  29  * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
  30  * The vmalloc area spans 0x100000000 to 0x200000000.
  31  * Since modules need to be in the lowest 32-bits of the address space,
  32  * we place them right before the OBP area from 0x10000000 to 0xf0000000.
  33  * There is a single static kernel PMD which maps from 0x0 to address
  34  * 0x400000000.
  35  */
  36 #define TLBTEMP_BASE            _AC(0x0000000006000000,UL)
  37 #define TSBMAP_BASE             _AC(0x0000000008000000,UL)
  38 #define MODULES_VADDR           _AC(0x0000000010000000,UL)
  39 #define MODULES_LEN             _AC(0x00000000e0000000,UL)
  40 #define MODULES_END             _AC(0x00000000f0000000,UL)
  41 #define LOW_OBP_ADDRESS         _AC(0x00000000f0000000,UL)
  42 #define HI_OBP_ADDRESS          _AC(0x0000000100000000,UL)
  43 #define VMALLOC_START           _AC(0x0000000100000000,UL)
  44 #define VMALLOC_END             _AC(0x0000010000000000,UL)
  45 #define VMEMMAP_BASE            _AC(0x0000010000000000,UL)
  46
  47 #define vmemmap                 ((struct page *)VMEMMAP_BASE)
  48
  49 /* XXX All of this needs to be rethought so we can take advantage
  50  * XXX cheetah's full 64-bit virtual address space, ie. no more hole
  51  * XXX in the middle like on spitfire. -DaveM
  52  */
  53 /*
  54  * Given a virtual address, the lowest PAGE_SHIFT bits determine offset
  55  * into the page; the next higher PAGE_SHIFT-3 bits determine the pte#
  56  * in the proper pagetable (the -3 is from the 8 byte ptes, and each page
  57  * table is a single page long). The next higher PMD_BITS determine pmd#
  58  * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2)
  59  * since the pmd entries are 4 bytes, and each pmd page is a single page
  60  * long). Finally, the higher few bits determine pgde#.
  61  */
  62
  63 /* PMD_SHIFT determines the size of the area a second-level page
  64  * table can map
  65  */
  66 #define PMD_SHIFT       (PAGE_SHIFT + (PAGE_SHIFT-3))
  67 #define PMD_SIZE        (_AC(1,UL) << PMD_SHIFT)
  68 #define PMD_MASK        (~(PMD_SIZE-1))
  69 #define PMD_BITS        (PAGE_SHIFT - 2)
  70
  71 /* PGDIR_SHIFT determines what a third-level page table entry can map */
  72 #define PGDIR_SHIFT     (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS)
  73 #define PGDIR_SIZE      (_AC(1,UL) << PGDIR_SHIFT)
  74 #define PGDIR_MASK      (~(PGDIR_SIZE-1))
  75 #define PGDIR_BITS      (PAGE_SHIFT - 2)
  76
  77 #ifndef __ASSEMBLY__
  78
  79 #include <linux/sched.h>
  80
  81 /* Entries per page directory level. */
  82 #define PTRS_PER_PTE    (1UL << (PAGE_SHIFT-3))
  83 #define PTRS_PER_PMD    (1UL << PMD_BITS)
  84 #define PTRS_PER_PGD    (1UL << PGDIR_BITS)
  85
  86 /* Kernel has a separate 44bit address space. */
  87 #define FIRST_USER_ADDRESS      0
  88
  89 #define pte_ERROR(e)    __builtin_trap()
  90 #define pmd_ERROR(e)    __builtin_trap()
  91 #define pgd_ERROR(e)    __builtin_trap()
  92
  93 #endif /* !(__ASSEMBLY__) */
  94
  95 /* PTE bits which are the same in SUN4U and SUN4V format.  */
  96 #define _PAGE_VALID       _AC(0x8000000000000000,UL) /* Valid TTE            */
  97 #define _PAGE_R           _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
  98
  99 /* SUN4U pte bits... */
 100 #define _PAGE_SZ4MB_4U    _AC(0x6000000000000000,UL) /* 4MB Page             */
 101 #define _PAGE_SZ512K_4U   _AC(0x4000000000000000,UL) /* 512K Page            */
 102 #define _PAGE_SZ64K_4U    _AC(0x2000000000000000,UL) /* 64K Page             */
 103 #define _PAGE_SZ8K_4U     _AC(0x0000000000000000,UL) /* 8K Page              */
 104 #define _PAGE_NFO_4U      _AC(0x1000000000000000,UL) /* No Fault Only        */
 105 #define _PAGE_IE_4U       _AC(0x0800000000000000,UL) /* Invert Endianness    */
 106 #define _PAGE_SOFT2_4U    _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
 107 #define _PAGE_RES1_4U     _AC(0x0002000000000000,UL) /* Reserved             */
 108 #define _PAGE_SZ32MB_4U   _AC(0x0001000000000000,UL) /* (Panther) 32MB page  */
 109 #define _PAGE_SZ256MB_4U  _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
 110 #define _PAGE_SZALL_4U    _AC(0x6001000000000000,UL) /* All pgsz bits        */
 111 #define _PAGE_SN_4U       _AC(0x0000800000000000,UL) /* (Cheetah) Snoop      */
 112 #define _PAGE_RES2_4U     _AC(0x0000780000000000,UL) /* Reserved             */
 113 #define _PAGE_PADDR_4U    _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13]  */
 114 #define _PAGE_SOFT_4U     _AC(0x0000000000001F80,UL) /* Software bits:       */
 115 #define _PAGE_EXEC_4U     _AC(0x0000000000001000,UL) /* Executable SW bit    */
 116 #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty)     */
 117 #define _PAGE_FILE_4U     _AC(0x0000000000000800,UL) /* Pagecache page       */
 118 #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd)     */
 119 #define _PAGE_READ_4U     _AC(0x0000000000000200,UL) /* Readable SW Bit      */
 120 #define _PAGE_WRITE_4U    _AC(0x0000000000000100,UL) /* Writable SW Bit      */
 121 #define _PAGE_PRESENT_4U  _AC(0x0000000000000080,UL) /* Present              */
 122 #define _PAGE_L_4U        _AC(0x0000000000000040,UL) /* Locked TTE           */
 123 #define _PAGE_CP_4U       _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
 124 #define _PAGE_CV_4U       _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
 125 #define _PAGE_E_4U        _AC(0x0000000000000008,UL) /* side-Effect          */
 126 #define _PAGE_P_4U        _AC(0x0000000000000004,UL) /* Privileged Page      */
 127 #define _PAGE_W_4U        _AC(0x0000000000000002,UL) /* Writable             */
 128
 129 /* SUN4V pte bits... */
 130 #define _PAGE_NFO_4V      _AC(0x4000000000000000,UL) /* No Fault Only        */
 131 #define _PAGE_SOFT2_4V    _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
 132 #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty)     */
 133 #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd)     */
 134 #define _PAGE_READ_4V     _AC(0x0800000000000000,UL) /* Readable SW Bit      */
 135 #define _PAGE_WRITE_4V    _AC(0x0400000000000000,UL) /* Writable SW Bit      */
 136 #define _PAGE_PADDR_4V    _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13]         */
 137 #define _PAGE_IE_4V       _AC(0x0000000000001000,UL) /* Invert Endianness    */
 138 #define _PAGE_E_4V        _AC(0x0000000000000800,UL) /* side-Effect          */
 139 #define _PAGE_CP_4V       _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
 140 #define _PAGE_CV_4V       _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
 141 #define _PAGE_P_4V        _AC(0x0000000000000100,UL) /* Privileged Page      */
 142 #define _PAGE_EXEC_4V     _AC(0x0000000000000080,UL) /* Executable Page      */
 143 #define _PAGE_W_4V        _AC(0x0000000000000040,UL) /* Writable             */
 144 #define _PAGE_SOFT_4V     _AC(0x0000000000000030,UL) /* Software bits        */
 145 #define _PAGE_FILE_4V     _AC(0x0000000000000020,UL) /* Pagecache page       */
 146 #define _PAGE_PRESENT_4V  _AC(0x0000000000000010,UL) /* Present              */
 147 #define _PAGE_RESV_4V     _AC(0x0000000000000008,UL) /* Reserved             */
 148 #define _PAGE_SZ16GB_4V   _AC(0x0000000000000007,UL) /* 16GB Page            */
 149 #define _PAGE_SZ2GB_4V    _AC(0x0000000000000006,UL) /* 2GB Page             */
 150 #define _PAGE_SZ256MB_4V  _AC(0x0000000000000005,UL) /* 256MB Page           */
 151 #define _PAGE_SZ32MB_4V   _AC(0x0000000000000004,UL) /* 32MB Page            */
 152 #define _PAGE_SZ4MB_4V    _AC(0x0000000000000003,UL) /* 4MB Page             */
 153 #define _PAGE_SZ512K_4V   _AC(0x0000000000000002,UL) /* 512K Page            */
 154 #define _PAGE_SZ64K_4V    _AC(0x0000000000000001,UL) /* 64K Page             */
 155 #define _PAGE_SZ8K_4V     _AC(0x0000000000000000,UL) /* 8K Page              */
 156 #define _PAGE_SZALL_4V    _AC(0x0000000000000007,UL) /* All pgsz bits        */
 157
 158 #if PAGE_SHIFT == 13
 159 #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
 160 #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
 161 #elif PAGE_SHIFT == 16
 162 #define _PAGE_SZBITS_4U _PAGE_SZ64K_4U
 163 #define _PAGE_SZBITS_4V _PAGE_SZ64K_4V
 164 #else
 165 #error Wrong PAGE_SHIFT specified
 166 #endif
 167
 168 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
 169 #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
 170 #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
 171 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
 172 #define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U
 173 #define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V
 174 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
 175 #define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U
 176 #define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V
 177 #endif
 178
 179 /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
 180 #define __P000  __pgprot(0)
 181 #define __P001  __pgprot(0)
 182 #define __P010  __pgprot(0)
 183 #define __P011  __pgprot(0)
 184 #define __P100  __pgprot(0)
 185 #define __P101  __pgprot(0)
 186 #define __P110  __pgprot(0)
 187 #define __P111  __pgprot(0)
 188
 189 #define __S000  __pgprot(0)
 190 #define __S001  __pgprot(0)
 191 #define __S010  __pgprot(0)
 192 #define __S011  __pgprot(0)
 193 #define __S100  __pgprot(0)
 194 #define __S101  __pgprot(0)
 195 #define __S110  __pgprot(0)
 196 #define __S111  __pgprot(0)
 197
 198 #ifndef __ASSEMBLY__
 199
 200 extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
 201
 202 extern unsigned long pte_sz_bits(unsigned long size);
 203
 204 extern pgprot_t PAGE_KERNEL;
 205 extern pgprot_t PAGE_KERNEL_LOCKED;
 206 extern pgprot_t PAGE_COPY;
 207 extern pgprot_t PAGE_SHARED;
 208
 209 /* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
 210 extern unsigned long _PAGE_IE;
 211 extern unsigned long _PAGE_E;
 212 extern unsigned long _PAGE_CACHE;
 213
 214 extern unsigned long pg_iobits;
 215 extern unsigned long _PAGE_ALL_SZ_BITS;
 216 extern unsigned long _PAGE_SZBITS;
 217
 218 extern struct page *mem_map_zero;
 219 #define ZERO_PAGE(vaddr)        (mem_map_zero)
 220
 221 /* PFNs are real physical page numbers.  However, mem_map only begins to record
 222  * per-page information starting at pfn_base.  This is to handle systems where
 223  * the first physical page in the machine is at some huge physical address,
 224  * such as 4GB.   This is common on a partitioned E10000, for example.
 225  */
 226 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
 227 {
 228         unsigned long paddr = pfn << PAGE_SHIFT;
 229         unsigned long sz_bits;
 230
 231         sz_bits = 0UL;
 232         if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) {
 233                 __asm__ __volatile__(
 234                 "\n661: sethi           %%uhi(%1), %0\n"
 235                 "       sllx            %0, 32, %0\n"
 236                 "       .section        .sun4v_2insn_patch, \"ax\"\n"
 237                 "       .word           661b\n"
 238                 "       mov             %2, %0\n"
 239                 "       nop\n"
 240                 "       .previous\n"
 241                 : "=r" (sz_bits)
 242                 : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V));
 243         }
 244         return __pte(paddr | sz_bits | pgprot_val(prot));
 245 }
 246 #define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
 247
 248 /* This one can be done with two shifts.  */
 249 static inline unsigned long pte_pfn(pte_t pte)
 250 {
 251         unsigned long ret;
 252
 253         __asm__ __volatile__(
 254         "\n661: sllx            %1, %2, %0\n"
 255         "       srlx            %0, %3, %0\n"
 256         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 257         "       .word           661b\n"
 258         "       sllx            %1, %4, %0\n"
 259         "       srlx            %0, %5, %0\n"
 260         "       .previous\n"
 261         : "=r" (ret)
 262         : "r" (pte_val(pte)),
 263           "i" (21), "i" (21 + PAGE_SHIFT),
 264           "i" (8), "i" (8 + PAGE_SHIFT));
 265
 266         return ret;
 267 }
 268 #define pte_page(x) pfn_to_page(pte_pfn(x))
 269
 270 static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
 271 {
 272         unsigned long mask, tmp;
 273
 274         /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347)
 275          * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8)
 276          *
 277          * Even if we use negation tricks the result is still a 6
 278          * instruction sequence, so don't try to play fancy and just
 279          * do the most straightforward implementation.
 280          *
 281          * Note: We encode this into 3 sun4v 2-insn patch sequences.
 282          */
 283
 284         __asm__ __volatile__(
 285         "\n661: sethi           %%uhi(%2), %1\n"
 286         "       sethi           %%hi(%2), %0\n"
 287         "\n662: or              %1, %%ulo(%2), %1\n"
 288         "       or              %0, %%lo(%2), %0\n"
 289         "\n663: sllx            %1, 32, %1\n"
 290         "       or              %0, %1, %0\n"
 291         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 292         "       .word           661b\n"
 293         "       sethi           %%uhi(%3), %1\n"
 294         "       sethi           %%hi(%3), %0\n"
 295         "       .word           662b\n"
 296         "       or              %1, %%ulo(%3), %1\n"
 297         "       or              %0, %%lo(%3), %0\n"
 298         "       .word           663b\n"
 299         "       sllx            %1, 32, %1\n"
 300         "       or              %0, %1, %0\n"
 301         "       .previous\n"
 302         : "=r" (mask), "=r" (tmp)
 303         : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
 304                _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U |
 305                _PAGE_SZBITS_4U),
 306           "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
 307                _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V |
 308                _PAGE_SZBITS_4V));
 309
 310         return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
 311 }
 312
 313 static inline pte_t pgoff_to_pte(unsigned long off)
 314 {
 315         off <<= PAGE_SHIFT;
 316
 317         __asm__ __volatile__(
 318         "\n661: or              %0, %2, %0\n"
 319         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 320         "       .word           661b\n"
 321         "       or              %0, %3, %0\n"
 322         "       .previous\n"
 323         : "=r" (off)
 324         : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
 325
 326         return __pte(off);
 327 }
 328
 329 static inline pgprot_t pgprot_noncached(pgprot_t prot)
 330 {
 331         unsigned long val = pgprot_val(prot);
 332
 333         __asm__ __volatile__(
 334         "\n661: andn            %0, %2, %0\n"
 335         "       or              %0, %3, %0\n"
 336         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 337         "       .word           661b\n"
 338         "       andn            %0, %4, %0\n"
 339         "       or              %0, %5, %0\n"
 340         "       .previous\n"
 341         : "=r" (val)
 342         : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
 343                      "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V));
 344
 345         return __pgprot(val);
 346 }
 347 /* Various pieces of code check for platform support by ifdef testing
 348  * on "pgprot_noncached".  That's broken and should be fixed, but for
 349  * now...
 350  */
 351 #define pgprot_noncached pgprot_noncached
 352
 353 #ifdef CONFIG_HUGETLB_PAGE
 354 static inline pte_t pte_mkhuge(pte_t pte)
 355 {
 356         unsigned long mask;
 357
 358         __asm__ __volatile__(
 359         "\n661: sethi           %%uhi(%1), %0\n"
 360         "       sllx            %0, 32, %0\n"
 361         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 362         "       .word           661b\n"
 363         "       mov             %2, %0\n"
 364         "       nop\n"
 365         "       .previous\n"
 366         : "=r" (mask)
 367         : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
 368
 369         return __pte(pte_val(pte) | mask);
 370 }
 371 #endif
 372
 373 static inline pte_t pte_mkdirty(pte_t pte)
 374 {
 375         unsigned long val = pte_val(pte), tmp;
 376
 377         __asm__ __volatile__(
 378         "\n661: or              %0, %3, %0\n"
 379         "       nop\n"
 380         "\n662: nop\n"
 381         "       nop\n"
 382         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 383         "       .word           661b\n"
 384         "       sethi           %%uhi(%4), %1\n"
 385         "       sllx            %1, 32, %1\n"
 386         "       .word           662b\n"
 387         "       or              %1, %%lo(%4), %1\n"
 388         "       or              %0, %1, %0\n"
 389         "       .previous\n"
 390         : "=r" (val), "=r" (tmp)
 391         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 392           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 393
 394         return __pte(val);
 395 }
 396
 397 static inline pte_t pte_mkclean(pte_t pte)
 398 {
 399         unsigned long val = pte_val(pte), tmp;
 400
 401         __asm__ __volatile__(
 402         "\n661: andn            %0, %3, %0\n"
 403         "       nop\n"
 404         "\n662: nop\n"
 405         "       nop\n"
 406         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 407         "       .word           661b\n"
 408         "       sethi           %%uhi(%4), %1\n"
 409         "       sllx            %1, 32, %1\n"
 410         "       .word           662b\n"
 411         "       or              %1, %%lo(%4), %1\n"
 412         "       andn            %0, %1, %0\n"
 413         "       .previous\n"
 414         : "=r" (val), "=r" (tmp)
 415         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 416           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 417
 418         return __pte(val);
 419 }
 420
 421 static inline pte_t pte_mkwrite(pte_t pte)
 422 {
 423         unsigned long val = pte_val(pte), mask;
 424
 425         __asm__ __volatile__(
 426         "\n661: mov             %1, %0\n"
 427         "       nop\n"
 428         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 429         "       .word           661b\n"
 430         "       sethi           %%uhi(%2), %0\n"
 431         "       sllx            %0, 32, %0\n"
 432         "       .previous\n"
 433         : "=r" (mask)
 434         : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
 435
 436         return __pte(val | mask);
 437 }
 438
 439 static inline pte_t pte_wrprotect(pte_t pte)
 440 {
 441         unsigned long val = pte_val(pte), tmp;
 442
 443         __asm__ __volatile__(
 444         "\n661: andn            %0, %3, %0\n"
 445         "       nop\n"
 446         "\n662: nop\n"
 447         "       nop\n"
 448         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 449         "       .word           661b\n"
 450         "       sethi           %%uhi(%4), %1\n"
 451         "       sllx            %1, 32, %1\n"
 452         "       .word           662b\n"
 453         "       or              %1, %%lo(%4), %1\n"
 454         "       andn            %0, %1, %0\n"
 455         "       .previous\n"
 456         : "=r" (val), "=r" (tmp)
 457         : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
 458           "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
 459
 460         return __pte(val);
 461 }
 462
 463 static inline pte_t pte_mkold(pte_t pte)
 464 {
 465         unsigned long mask;
 466
 467         __asm__ __volatile__(
 468         "\n661: mov             %1, %0\n"
 469         "       nop\n"
 470         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 471         "       .word           661b\n"
 472         "       sethi           %%uhi(%2), %0\n"
 473         "       sllx            %0, 32, %0\n"
 474         "       .previous\n"
 475         : "=r" (mask)
 476         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 477
 478         mask |= _PAGE_R;
 479
 480         return __pte(pte_val(pte) & ~mask);
 481 }
 482
 483 static inline pte_t pte_mkyoung(pte_t pte)
 484 {
 485         unsigned long mask;
 486
 487         __asm__ __volatile__(
 488         "\n661: mov             %1, %0\n"
 489         "       nop\n"
 490         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 491         "       .word           661b\n"
 492         "       sethi           %%uhi(%2), %0\n"
 493         "       sllx            %0, 32, %0\n"
 494         "       .previous\n"
 495         : "=r" (mask)
 496         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 497
 498         mask |= _PAGE_R;
 499
 500         return __pte(pte_val(pte) | mask);
 501 }
 502
 503 static inline pte_t pte_mkspecial(pte_t pte)
 504 {
 505         return pte;
 506 }
 507
 508 static inline unsigned long pte_young(pte_t pte)
 509 {
 510         unsigned long mask;
 511
 512         __asm__ __volatile__(
 513         "\n661: mov             %1, %0\n"
 514         "       nop\n"
 515         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 516         "       .word           661b\n"
 517         "       sethi           %%uhi(%2), %0\n"
 518         "       sllx            %0, 32, %0\n"
 519         "       .previous\n"
 520         : "=r" (mask)
 521         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 522
 523         return (pte_val(pte) & mask);
 524 }
 525
 526 static inline unsigned long pte_dirty(pte_t pte)
 527 {
 528         unsigned long mask;
 529
 530         __asm__ __volatile__(
 531         "\n661: mov             %1, %0\n"
 532         "       nop\n"
 533         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 534         "       .word           661b\n"
 535         "       sethi           %%uhi(%2), %0\n"
 536         "       sllx            %0, 32, %0\n"
 537         "       .previous\n"
 538         : "=r" (mask)
 539         : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
 540
 541         return (pte_val(pte) & mask);
 542 }
 543
 544 static inline unsigned long pte_write(pte_t pte)
 545 {
 546         unsigned long mask;
 547
 548         __asm__ __volatile__(
 549         "\n661: mov             %1, %0\n"
 550         "       nop\n"
 551         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 552         "       .word           661b\n"
 553         "       sethi           %%uhi(%2), %0\n"
 554         "       sllx            %0, 32, %0\n"
 555         "       .previous\n"
 556         : "=r" (mask)
 557         : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
 558
 559         return (pte_val(pte) & mask);
 560 }
 561
 562 static inline unsigned long pte_exec(pte_t pte)
 563 {
 564         unsigned long mask;
 565
 566         __asm__ __volatile__(
 567         "\n661: sethi           %%hi(%1), %0\n"
 568         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 569         "       .word           661b\n"
 570         "       mov             %2, %0\n"
 571         "       .previous\n"
 572         : "=r" (mask)
 573         : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
 574
 575         return (pte_val(pte) & mask);
 576 }
 577
 578 static inline unsigned long pte_file(pte_t pte)
 579 {
 580         unsigned long val = pte_val(pte);
 581
 582         __asm__ __volatile__(
 583         "\n661: and             %0, %2, %0\n"
 584         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 585         "       .word           661b\n"
 586         "       and             %0, %3, %0\n"
 587         "       .previous\n"
 588         : "=r" (val)
 589         : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
 590
 591         return val;
 592 }
 593
 594 static inline unsigned long pte_present(pte_t pte)
 595 {
 596         unsigned long val = pte_val(pte);
 597
 598         __asm__ __volatile__(
 599         "\n661: and             %0, %2, %0\n"
 600         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 601         "       .word           661b\n"
 602         "       and             %0, %3, %0\n"
 603         "       .previous\n"
 604         : "=r" (val)
 605         : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
 606
 607         return val;
 608 }
 609
 610 static inline int pte_special(pte_t pte)
 611 {
 612         return 0;
 613 }
 614
 615 #define pmd_set(pmdp, ptep)     \
 616         (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
 617 #define pud_set(pudp, pmdp)     \
 618         (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
 619 #define __pmd_page(pmd)         \
 620         ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
 621 #define pmd_page(pmd)                   virt_to_page((void *)__pmd_page(pmd))
 622 #define pud_page_vaddr(pud)             \
 623         ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
 624 #define pud_page(pud)                   virt_to_page((void *)pud_page_vaddr(pud))
 625 #define pmd_none(pmd)                   (!pmd_val(pmd))
 626 #define pmd_bad(pmd)                    (0)
 627 #define pmd_present(pmd)                (pmd_val(pmd) != 0U)
 628 #define pmd_clear(pmdp)                 (pmd_val(*(pmdp)) = 0U)
 629 #define pud_none(pud)                   (!pud_val(pud))
 630 #define pud_bad(pud)                    (0)
 631 #define pud_present(pud)                (pud_val(pud) != 0U)
 632 #define pud_clear(pudp)                 (pud_val(*(pudp)) = 0U)
 633
 634 /* Same in both SUN4V and SUN4U.  */
 635 #define pte_none(pte)                   (!pte_val(pte))
 636
 637 /* to find an entry in a page-table-directory. */
 638 #define pgd_index(address)      (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
 639 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
 640
 641 /* to find an entry in a kernel page-table-directory */
 642 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
 643
 644 /* Find an entry in the second-level page table.. */
 645 #define pmd_offset(pudp, address)       \
 646         ((pmd_t *) pud_page_vaddr(*(pudp)) + \
 647          (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
 648
 649 /* Find an entry in the third-level page table.. */
 650 #define pte_index(dir, address) \
 651         ((pte_t *) __pmd_page(*(dir)) + \
 652          ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 653 #define pte_offset_kernel               pte_index
 654 #define pte_offset_map                  pte_index
 655 #define pte_offset_map_nested           pte_index
 656 #define pte_unmap(pte)                  do { } while (0)
 657 #define pte_unmap_nested(pte)           do { } while (0)
 658
 659 /* Actual page table PTE updates.  */
 660 extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig);
 661
 662 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
 663 {
 664         pte_t orig = *ptep;
 665
 666         *ptep = pte;
 667
 668         /* It is more efficient to let flush_tlb_kernel_range()
 669          * handle init_mm tlb flushes.
 670          *
 671          * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
 672          *             and SUN4V pte layout, so this inline test is fine.
 673          */
 674         if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
 675                 tlb_batch_add(mm, addr, ptep, orig);
 676 }
 677
 678 #define pte_clear(mm,addr,ptep)         \
 679         set_pte_at((mm), (addr), (ptep), __pte(0UL))
 680
 681 #ifdef DCACHE_ALIASING_POSSIBLE
 682 #define __HAVE_ARCH_MOVE_PTE
 683 #define move_pte(pte, prot, old_addr, new_addr)                         \
 684 ({                                                                      \
 685         pte_t newpte = (pte);                                           \
 686         if (tlb_type != hypervisor && pte_present(pte)) {               \
 687                 unsigned long this_pfn = pte_pfn(pte);                  \
 688                                                                         \
 689                 if (pfn_valid(this_pfn) &&                              \
 690                     (((old_addr) ^ (new_addr)) & (1 << 13)))            \
 691                         flush_dcache_page_all(current->mm,              \
 692                                               pfn_to_page(this_pfn));   \
 693         }                                                               \
 694         newpte;                                                         \
 695 })
 696 #endif
 697
 698 extern pgd_t swapper_pg_dir[2048];
 699 extern pmd_t swapper_low_pmd_dir[2048];
 700
 701 extern void paging_init(void);
 702 extern unsigned long find_ecache_flush_span(unsigned long size);
 703
 704 /* These do nothing with the way I have things setup. */
 705 #define mmu_lockarea(vaddr, len)                (vaddr)
 706 #define mmu_unlockarea(vaddr, len)              do { } while(0)
 707
 708 struct vm_area_struct;
 709 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
 710
 711 /* Encode and de-code a swap entry */
 712 #define __swp_type(entry)       (((entry).val >> PAGE_SHIFT) & 0xffUL)
 713 #define __swp_offset(entry)     ((entry).val >> (PAGE_SHIFT + 8UL))
 714 #define __swp_entry(type, offset)       \
 715         ( (swp_entry_t) \
 716           { \
 717                 (((long)(type) << PAGE_SHIFT) | \
 718                  ((long)(offset) << (PAGE_SHIFT + 8UL))) \
 719           } )
 720 #define __pte_to_swp_entry(pte)         ((swp_entry_t) { pte_val(pte) })
 721 #define __swp_entry_to_pte(x)           ((pte_t) { (x).val })
 722
 723 /* File offset in PTE support. */
 724 extern unsigned long pte_file(pte_t);
 725 #define pte_to_pgoff(pte)       (pte_val(pte) >> PAGE_SHIFT)
 726 extern pte_t pgoff_to_pte(unsigned long);
 727 #define PTE_FILE_MAX_BITS       (64UL - PAGE_SHIFT - 1UL)
 728
 729 extern unsigned long sparc64_valid_addr_bitmap[];
 730
 731 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 732 static inline bool kern_addr_valid(unsigned long addr)
 733 {
 734         unsigned long paddr = __pa(addr);
 735
 736         if ((paddr >> 41UL) != 0UL)
 737                 return false;
 738         return test_bit(paddr >> 22, sparc64_valid_addr_bitmap);
 739 }
 740
 741 extern int page_in_phys_avail(unsigned long paddr);
 742
 743 extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 744                                unsigned long pfn,
 745                                unsigned long size, pgprot_t prot);
 746
 747 /*
 748  * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
 749  * its high 4 bits.  These macros/functions put it there or get it from there.
 750  */
 751 #define MK_IOSPACE_PFN(space, pfn)      (pfn | (space << (BITS_PER_LONG - 4)))
 752 #define GET_IOSPACE(pfn)                (pfn >> (BITS_PER_LONG - 4))
 753 #define GET_PFN(pfn)                    (pfn & 0x0fffffffffffffffUL)
 754
 755 #include <asm-generic/pgtable.h>
 756
 757 /* We provide our own get_unmapped_area to cope with VA holes and
 758  * SHM area cache aliasing for userland.
 759  */
 760 #define HAVE_ARCH_UNMAPPED_AREA
 761 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
 762
 763 /* We provide a special get_unmapped_area for framebuffer mmaps to try and use
 764  * the largest alignment possible such that larget PTEs can be used.
 765  */
 766 extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
 767                                           unsigned long, unsigned long,
 768                                           unsigned long);
 769 #define HAVE_ARCH_FB_UNMAPPED_AREA
 770
 771 extern void pgtable_cache_init(void);
 772 extern void sun4v_register_fault_status(void);
 773 extern void sun4v_ktsb_register(void);
 774 extern void __init cheetah_ecache_flush_init(void);
 775 extern void sun4v_patch_tlb_handlers(void);
 776
 777 extern unsigned long cmdline_memory_size;
 778
 779 extern asmlinkage void do_sparc64_fault(struct pt_regs *regs);
 780
 781 #endif /* !(__ASSEMBLY__) */
 782
 783 #endif /* !(_SPARC64_PGTABLE_H) */