include/asm-sparc64/pgtable.h

   1 /* $Id: pgtable.h,v 1.156 2002/02/09 19:49:31 davem Exp $
   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 <asm/types.h>
  19 #include <asm/spitfire.h>
  20 #include <asm/asi.h>
  21 #include <asm/system.h>
  22 #include <asm/page.h>
  23 #include <asm/processor.h>
  24 #include <asm/const.h>
  25
  26 /* The kernel image occupies 0x4000000 to 0x1000000 (4MB --> 32MB).
  27  * The page copy blockops can use 0x2000000 to 0x4000000.
  28  * The TSB is mapped in the 0x4000000 to 0x6000000 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(0x0000000002000000,UL)
  37 #define TSBMAP_BASE             _AC(0x0000000004000000,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(0x0000000200000000,UL)
  45
  46 /* XXX All of this needs to be rethought so we can take advantage
  47  * XXX cheetah's full 64-bit virtual address space, ie. no more hole
  48  * XXX in the middle like on spitfire. -DaveM
  49  */
  50 /*
  51  * Given a virtual address, the lowest PAGE_SHIFT bits determine offset
  52  * into the page; the next higher PAGE_SHIFT-3 bits determine the pte#
  53  * in the proper pagetable (the -3 is from the 8 byte ptes, and each page
  54  * table is a single page long). The next higher PMD_BITS determine pmd#
  55  * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2)
  56  * since the pmd entries are 4 bytes, and each pmd page is a single page
  57  * long). Finally, the higher few bits determine pgde#.
  58  */
  59
  60 /* PMD_SHIFT determines the size of the area a second-level page
  61  * table can map
  62  */
  63 #define PMD_SHIFT       (PAGE_SHIFT + (PAGE_SHIFT-3))
  64 #define PMD_SIZE        (_AC(1,UL) << PMD_SHIFT)
  65 #define PMD_MASK        (~(PMD_SIZE-1))
  66 #define PMD_BITS        (PAGE_SHIFT - 2)
  67
  68 /* PGDIR_SHIFT determines what a third-level page table entry can map */
  69 #define PGDIR_SHIFT     (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS)
  70 #define PGDIR_SIZE      (_AC(1,UL) << PGDIR_SHIFT)
  71 #define PGDIR_MASK      (~(PGDIR_SIZE-1))
  72 #define PGDIR_BITS      (PAGE_SHIFT - 2)
  73
  74 #ifndef __ASSEMBLY__
  75
  76 #include <linux/sched.h>
  77
  78 /* Entries per page directory level. */
  79 #define PTRS_PER_PTE    (1UL << (PAGE_SHIFT-3))
  80 #define PTRS_PER_PMD    (1UL << PMD_BITS)
  81 #define PTRS_PER_PGD    (1UL << PGDIR_BITS)
  82
  83 /* Kernel has a separate 44bit address space. */
  84 #define FIRST_USER_ADDRESS      0
  85
  86 #define pte_ERROR(e)    __builtin_trap()
  87 #define pmd_ERROR(e)    __builtin_trap()
  88 #define pgd_ERROR(e)    __builtin_trap()
  89
  90 #endif /* !(__ASSEMBLY__) */
  91
  92 /* PTE bits which are the same in SUN4U and SUN4V format.  */
  93 #define _PAGE_VALID       _AC(0x8000000000000000,UL) /* Valid TTE            */
  94 #define _PAGE_R           _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
  95
  96 /* SUN4U pte bits... */
  97 #define _PAGE_SZ4MB_4U    _AC(0x6000000000000000,UL) /* 4MB Page             */
  98 #define _PAGE_SZ512K_4U   _AC(0x4000000000000000,UL) /* 512K Page            */
  99 #define _PAGE_SZ64K_4U    _AC(0x2000000000000000,UL) /* 64K Page             */
 100 #define _PAGE_SZ8K_4U     _AC(0x0000000000000000,UL) /* 8K Page              */
 101 #define _PAGE_NFO_4U      _AC(0x1000000000000000,UL) /* No Fault Only        */
 102 #define _PAGE_IE_4U       _AC(0x0800000000000000,UL) /* Invert Endianness    */
 103 #define _PAGE_SOFT2_4U    _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
 104 #define _PAGE_RES1_4U     _AC(0x0002000000000000,UL) /* Reserved             */
 105 #define _PAGE_SZ32MB_4U   _AC(0x0001000000000000,UL) /* (Panther) 32MB page  */
 106 #define _PAGE_SZ256MB_4U  _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
 107 #define _PAGE_SZALL_4U    _AC(0x6001000000000000,UL) /* All pgsz bits        */
 108 #define _PAGE_SN_4U       _AC(0x0000800000000000,UL) /* (Cheetah) Snoop      */
 109 #define _PAGE_RES2_4U     _AC(0x0000780000000000,UL) /* Reserved             */
 110 #define _PAGE_PADDR_4U    _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13]  */
 111 #define _PAGE_SOFT_4U     _AC(0x0000000000001F80,UL) /* Software bits:       */
 112 #define _PAGE_EXEC_4U     _AC(0x0000000000001000,UL) /* Executable SW bit    */
 113 #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty)     */
 114 #define _PAGE_FILE_4U     _AC(0x0000000000000800,UL) /* Pagecache page       */
 115 #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd)     */
 116 #define _PAGE_READ_4U     _AC(0x0000000000000200,UL) /* Readable SW Bit      */
 117 #define _PAGE_WRITE_4U    _AC(0x0000000000000100,UL) /* Writable SW Bit      */
 118 #define _PAGE_PRESENT_4U  _AC(0x0000000000000080,UL) /* Present              */
 119 #define _PAGE_L_4U        _AC(0x0000000000000040,UL) /* Locked TTE           */
 120 #define _PAGE_CP_4U       _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
 121 #define _PAGE_CV_4U       _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
 122 #define _PAGE_E_4U        _AC(0x0000000000000008,UL) /* side-Effect          */
 123 #define _PAGE_P_4U        _AC(0x0000000000000004,UL) /* Privileged Page      */
 124 #define _PAGE_W_4U        _AC(0x0000000000000002,UL) /* Writable             */
 125
 126 /* SUN4V pte bits... */
 127 #define _PAGE_NFO_4V      _AC(0x4000000000000000,UL) /* No Fault Only        */
 128 #define _PAGE_SOFT2_4V    _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
 129 #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty)     */
 130 #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd)     */
 131 #define _PAGE_READ_4V     _AC(0x0800000000000000,UL) /* Readable SW Bit      */
 132 #define _PAGE_WRITE_4V    _AC(0x0400000000000000,UL) /* Writable SW Bit      */
 133 #define _PAGE_PADDR_4V    _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13]         */
 134 #define _PAGE_IE_4V       _AC(0x0000000000001000,UL) /* Invert Endianness    */
 135 #define _PAGE_E_4V        _AC(0x0000000000000800,UL) /* side-Effect          */
 136 #define _PAGE_CP_4V       _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
 137 #define _PAGE_CV_4V       _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
 138 #define _PAGE_P_4V        _AC(0x0000000000000100,UL) /* Privileged Page      */
 139 #define _PAGE_EXEC_4V     _AC(0x0000000000000080,UL) /* Executable Page      */
 140 #define _PAGE_W_4V        _AC(0x0000000000000040,UL) /* Writable             */
 141 #define _PAGE_SOFT_4V     _AC(0x0000000000000030,UL) /* Software bits        */
 142 #define _PAGE_FILE_4V     _AC(0x0000000000000020,UL) /* Pagecache page       */
 143 #define _PAGE_PRESENT_4V  _AC(0x0000000000000010,UL) /* Present              */
 144 #define _PAGE_RESV_4V     _AC(0x0000000000000008,UL) /* Reserved             */
 145 #define _PAGE_SZ16GB_4V   _AC(0x0000000000000007,UL) /* 16GB Page            */
 146 #define _PAGE_SZ2GB_4V    _AC(0x0000000000000006,UL) /* 2GB Page             */
 147 #define _PAGE_SZ256MB_4V  _AC(0x0000000000000005,UL) /* 256MB Page           */
 148 #define _PAGE_SZ32MB_4V   _AC(0x0000000000000004,UL) /* 32MB Page            */
 149 #define _PAGE_SZ4MB_4V    _AC(0x0000000000000003,UL) /* 4MB Page             */
 150 #define _PAGE_SZ512K_4V   _AC(0x0000000000000002,UL) /* 512K Page            */
 151 #define _PAGE_SZ64K_4V    _AC(0x0000000000000001,UL) /* 64K Page             */
 152 #define _PAGE_SZ8K_4V     _AC(0x0000000000000000,UL) /* 8K Page              */
 153 #define _PAGE_SZALL_4V    _AC(0x0000000000000007,UL) /* All pgsz bits        */
 154
 155 #if PAGE_SHIFT == 13
 156 #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
 157 #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
 158 #elif PAGE_SHIFT == 16
 159 #define _PAGE_SZBITS_4U _PAGE_SZ64K_4U
 160 #define _PAGE_SZBITS_4V _PAGE_SZ64K_4V
 161 #elif PAGE_SHIFT == 19
 162 #define _PAGE_SZBITS_4U _PAGE_SZ512K_4U
 163 #define _PAGE_SZBITS_4V _PAGE_SZ512K_4V
 164 #elif PAGE_SHIFT == 22
 165 #define _PAGE_SZBITS_4U _PAGE_SZ4MB_4U
 166 #define _PAGE_SZBITS_4V _PAGE_SZ4MB_4V
 167 #else
 168 #error Wrong PAGE_SHIFT specified
 169 #endif
 170
 171 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
 172 #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
 173 #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
 174 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
 175 #define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U
 176 #define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V
 177 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
 178 #define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U
 179 #define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V
 180 #endif
 181
 182 /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
 183 #define __P000  __pgprot(0)
 184 #define __P001  __pgprot(0)
 185 #define __P010  __pgprot(0)
 186 #define __P011  __pgprot(0)
 187 #define __P100  __pgprot(0)
 188 #define __P101  __pgprot(0)
 189 #define __P110  __pgprot(0)
 190 #define __P111  __pgprot(0)
 191
 192 #define __S000  __pgprot(0)
 193 #define __S001  __pgprot(0)
 194 #define __S010  __pgprot(0)
 195 #define __S011  __pgprot(0)
 196 #define __S100  __pgprot(0)
 197 #define __S101  __pgprot(0)
 198 #define __S110  __pgprot(0)
 199 #define __S111  __pgprot(0)
 200
 201 #ifndef __ASSEMBLY__
 202
 203 extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
 204
 205 extern unsigned long pte_sz_bits(unsigned long size);
 206
 207 extern pgprot_t PAGE_KERNEL;
 208 extern pgprot_t PAGE_KERNEL_LOCKED;
 209 extern pgprot_t PAGE_COPY;
 210 extern pgprot_t PAGE_SHARED;
 211
 212 /* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
 213 extern unsigned long _PAGE_IE;
 214 extern unsigned long _PAGE_E;
 215 extern unsigned long _PAGE_CACHE;
 216
 217 extern unsigned long pg_iobits;
 218 extern unsigned long _PAGE_ALL_SZ_BITS;
 219 extern unsigned long _PAGE_SZBITS;
 220
 221 extern struct page *mem_map_zero;
 222 #define ZERO_PAGE(vaddr)        (mem_map_zero)
 223
 224 /* PFNs are real physical page numbers.  However, mem_map only begins to record
 225  * per-page information starting at pfn_base.  This is to handle systems where
 226  * the first physical page in the machine is at some huge physical address,
 227  * such as 4GB.   This is common on a partitioned E10000, for example.
 228  */
 229 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
 230 {
 231         unsigned long paddr = pfn << PAGE_SHIFT;
 232         unsigned long sz_bits;
 233
 234         sz_bits = 0UL;
 235         if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) {
 236                 __asm__ __volatile__(
 237                 "\n661: sethi           %%uhi(%1), %0\n"
 238                 "       sllx            %0, 32, %0\n"
 239                 "       .section        .sun4v_2insn_patch, \"ax\"\n"
 240                 "       .word           661b\n"
 241                 "       mov             %2, %0\n"
 242                 "       nop\n"
 243                 "       .previous\n"
 244                 : "=r" (sz_bits)
 245                 : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V));
 246         }
 247         return __pte(paddr | sz_bits | pgprot_val(prot));
 248 }
 249 #define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
 250
 251 /* This one can be done with two shifts.  */
 252 static inline unsigned long pte_pfn(pte_t pte)
 253 {
 254         unsigned long ret;
 255
 256         __asm__ __volatile__(
 257         "\n661: sllx            %1, %2, %0\n"
 258         "       srlx            %0, %3, %0\n"
 259         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 260         "       .word           661b\n"
 261         "       sllx            %1, %4, %0\n"
 262         "       srlx            %0, %5, %0\n"
 263         "       .previous\n"
 264         : "=r" (ret)
 265         : "r" (pte_val(pte)),
 266           "i" (21), "i" (21 + PAGE_SHIFT),
 267           "i" (8), "i" (8 + PAGE_SHIFT));
 268
 269         return ret;
 270 }
 271 #define pte_page(x) pfn_to_page(pte_pfn(x))
 272
 273 static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
 274 {
 275         unsigned long mask, tmp;
 276
 277         /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347)
 278          * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8)
 279          *
 280          * Even if we use negation tricks the result is still a 6
 281          * instruction sequence, so don't try to play fancy and just
 282          * do the most straightforward implementation.
 283          *
 284          * Note: We encode this into 3 sun4v 2-insn patch sequences.
 285          */
 286
 287         __asm__ __volatile__(
 288         "\n661: sethi           %%uhi(%2), %1\n"
 289         "       sethi           %%hi(%2), %0\n"
 290         "\n662: or              %1, %%ulo(%2), %1\n"
 291         "       or              %0, %%lo(%2), %0\n"
 292         "\n663: sllx            %1, 32, %1\n"
 293         "       or              %0, %1, %0\n"
 294         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 295         "       .word           661b\n"
 296         "       sethi           %%uhi(%3), %1\n"
 297         "       sethi           %%hi(%3), %0\n"
 298         "       .word           662b\n"
 299         "       or              %1, %%ulo(%3), %1\n"
 300         "       or              %0, %%lo(%3), %0\n"
 301         "       .word           663b\n"
 302         "       sllx            %1, 32, %1\n"
 303         "       or              %0, %1, %0\n"
 304         "       .previous\n"
 305         : "=r" (mask), "=r" (tmp)
 306         : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
 307                _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U |
 308                _PAGE_SZBITS_4U),
 309           "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
 310                _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V |
 311                _PAGE_SZBITS_4V));
 312
 313         return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
 314 }
 315
 316 static inline pte_t pgoff_to_pte(unsigned long off)
 317 {
 318         off <<= PAGE_SHIFT;
 319
 320         __asm__ __volatile__(
 321         "\n661: or              %0, %2, %0\n"
 322         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 323         "       .word           661b\n"
 324         "       or              %0, %3, %0\n"
 325         "       .previous\n"
 326         : "=r" (off)
 327         : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
 328
 329         return __pte(off);
 330 }
 331
 332 static inline pgprot_t pgprot_noncached(pgprot_t prot)
 333 {
 334         unsigned long val = pgprot_val(prot);
 335
 336         __asm__ __volatile__(
 337         "\n661: andn            %0, %2, %0\n"
 338         "       or              %0, %3, %0\n"
 339         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 340         "       .word           661b\n"
 341         "       andn            %0, %4, %0\n"
 342         "       or              %0, %5, %0\n"
 343         "       .previous\n"
 344         : "=r" (val)
 345         : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
 346                      "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V));
 347
 348         return __pgprot(val);
 349 }
 350 /* Various pieces of code check for platform support by ifdef testing
 351  * on "pgprot_noncached".  That's broken and should be fixed, but for
 352  * now...
 353  */
 354 #define pgprot_noncached pgprot_noncached
 355
 356 #ifdef CONFIG_HUGETLB_PAGE
 357 static inline pte_t pte_mkhuge(pte_t pte)
 358 {
 359         unsigned long mask;
 360
 361         __asm__ __volatile__(
 362         "\n661: sethi           %%uhi(%1), %0\n"
 363         "       sllx            %0, 32, %0\n"
 364         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 365         "       .word           661b\n"
 366         "       mov             %2, %0\n"
 367         "       nop\n"
 368         "       .previous\n"
 369         : "=r" (mask)
 370         : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
 371
 372         return __pte(pte_val(pte) | mask);
 373 }
 374 #endif
 375
 376 static inline pte_t pte_mkdirty(pte_t pte)
 377 {
 378         unsigned long val = pte_val(pte), tmp;
 379
 380         __asm__ __volatile__(
 381         "\n661: or              %0, %3, %0\n"
 382         "       nop\n"
 383         "\n662: nop\n"
 384         "       nop\n"
 385         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 386         "       .word           661b\n"
 387         "       sethi           %%uhi(%4), %1\n"
 388         "       sllx            %1, 32, %1\n"
 389         "       .word           662b\n"
 390         "       or              %1, %%lo(%4), %1\n"
 391         "       or              %0, %1, %0\n"
 392         "       .previous\n"
 393         : "=r" (val), "=r" (tmp)
 394         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 395           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 396
 397         return __pte(val);
 398 }
 399
 400 static inline pte_t pte_mkclean(pte_t pte)
 401 {
 402         unsigned long val = pte_val(pte), tmp;
 403
 404         __asm__ __volatile__(
 405         "\n661: andn            %0, %3, %0\n"
 406         "       nop\n"
 407         "\n662: nop\n"
 408         "       nop\n"
 409         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 410         "       .word           661b\n"
 411         "       sethi           %%uhi(%4), %1\n"
 412         "       sllx            %1, 32, %1\n"
 413         "       .word           662b\n"
 414         "       or              %1, %%lo(%4), %1\n"
 415         "       andn            %0, %1, %0\n"
 416         "       .previous\n"
 417         : "=r" (val), "=r" (tmp)
 418         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 419           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 420
 421         return __pte(val);
 422 }
 423
 424 static inline pte_t pte_mkwrite(pte_t pte)
 425 {
 426         unsigned long val = pte_val(pte), mask;
 427
 428         __asm__ __volatile__(
 429         "\n661: mov             %1, %0\n"
 430         "       nop\n"
 431         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 432         "       .word           661b\n"
 433         "       sethi           %%uhi(%2), %0\n"
 434         "       sllx            %0, 32, %0\n"
 435         "       .previous\n"
 436         : "=r" (mask)
 437         : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
 438
 439         return __pte(val | mask);
 440 }
 441
 442 static inline pte_t pte_wrprotect(pte_t pte)
 443 {
 444         unsigned long val = pte_val(pte), tmp;
 445
 446         __asm__ __volatile__(
 447         "\n661: andn            %0, %3, %0\n"
 448         "       nop\n"
 449         "\n662: nop\n"
 450         "       nop\n"
 451         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 452         "       .word           661b\n"
 453         "       sethi           %%uhi(%4), %1\n"
 454         "       sllx            %1, 32, %1\n"
 455         "       .word           662b\n"
 456         "       or              %1, %%lo(%4), %1\n"
 457         "       andn            %0, %1, %0\n"
 458         "       .previous\n"
 459         : "=r" (val), "=r" (tmp)
 460         : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
 461           "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
 462
 463         return __pte(val);
 464 }
 465
 466 static inline pte_t pte_mkold(pte_t pte)
 467 {
 468         unsigned long mask;
 469
 470         __asm__ __volatile__(
 471         "\n661: mov             %1, %0\n"
 472         "       nop\n"
 473         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 474         "       .word           661b\n"
 475         "       sethi           %%uhi(%2), %0\n"
 476         "       sllx            %0, 32, %0\n"
 477         "       .previous\n"
 478         : "=r" (mask)
 479         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 480
 481         mask |= _PAGE_R;
 482
 483         return __pte(pte_val(pte) & ~mask);
 484 }
 485
 486 static inline pte_t pte_mkyoung(pte_t pte)
 487 {
 488         unsigned long mask;
 489
 490         __asm__ __volatile__(
 491         "\n661: mov             %1, %0\n"
 492         "       nop\n"
 493         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 494         "       .word           661b\n"
 495         "       sethi           %%uhi(%2), %0\n"
 496         "       sllx            %0, 32, %0\n"
 497         "       .previous\n"
 498         : "=r" (mask)
 499         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 500
 501         mask |= _PAGE_R;
 502
 503         return __pte(pte_val(pte) | mask);
 504 }
 505
 506 static inline unsigned long pte_young(pte_t pte)
 507 {
 508         unsigned long mask;
 509
 510         __asm__ __volatile__(
 511         "\n661: mov             %1, %0\n"
 512         "       nop\n"
 513         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 514         "       .word           661b\n"
 515         "       sethi           %%uhi(%2), %0\n"
 516         "       sllx            %0, 32, %0\n"
 517         "       .previous\n"
 518         : "=r" (mask)
 519         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 520
 521         return (pte_val(pte) & mask);
 522 }
 523
 524 static inline unsigned long pte_dirty(pte_t pte)
 525 {
 526         unsigned long mask;
 527
 528         __asm__ __volatile__(
 529         "\n661: mov             %1, %0\n"
 530         "       nop\n"
 531         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 532         "       .word           661b\n"
 533         "       sethi           %%uhi(%2), %0\n"
 534         "       sllx            %0, 32, %0\n"
 535         "       .previous\n"
 536         : "=r" (mask)
 537         : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
 538
 539         return (pte_val(pte) & mask);
 540 }
 541
 542 static inline unsigned long pte_write(pte_t pte)
 543 {
 544         unsigned long mask;
 545
 546         __asm__ __volatile__(
 547         "\n661: mov             %1, %0\n"
 548         "       nop\n"
 549         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 550         "       .word           661b\n"
 551         "       sethi           %%uhi(%2), %0\n"
 552         "       sllx            %0, 32, %0\n"
 553         "       .previous\n"
 554         : "=r" (mask)
 555         : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
 556
 557         return (pte_val(pte) & mask);
 558 }
 559
 560 static inline unsigned long pte_exec(pte_t pte)
 561 {
 562         unsigned long mask;
 563
 564         __asm__ __volatile__(
 565         "\n661: sethi           %%hi(%1), %0\n"
 566         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 567         "       .word           661b\n"
 568         "       mov             %2, %0\n"
 569         "       .previous\n"
 570         : "=r" (mask)
 571         : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
 572
 573         return (pte_val(pte) & mask);
 574 }
 575
 576 static inline unsigned long pte_read(pte_t pte)
 577 {
 578         unsigned long mask;
 579
 580         __asm__ __volatile__(
 581         "\n661: mov             %1, %0\n"
 582         "       nop\n"
 583         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 584         "       .word           661b\n"
 585         "       sethi           %%uhi(%2), %0\n"
 586         "       sllx            %0, 32, %0\n"
 587         "       .previous\n"
 588         : "=r" (mask)
 589         : "i" (_PAGE_READ_4U), "i" (_PAGE_READ_4V));
 590
 591         return (pte_val(pte) & mask);
 592 }
 593
 594 static inline unsigned long pte_file(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_FILE_4U), "i" (_PAGE_FILE_4V));
 606
 607         return val;
 608 }
 609
 610 static inline unsigned long pte_present(pte_t pte)
 611 {
 612         unsigned long val = pte_val(pte);
 613
 614         __asm__ __volatile__(
 615         "\n661: and             %0, %2, %0\n"
 616         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 617         "       .word           661b\n"
 618         "       and             %0, %3, %0\n"
 619         "       .previous\n"
 620         : "=r" (val)
 621         : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
 622
 623         return val;
 624 }
 625
 626 #define pmd_set(pmdp, ptep)     \
 627         (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
 628 #define pud_set(pudp, pmdp)     \
 629         (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
 630 #define __pmd_page(pmd)         \
 631         ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
 632 #define pmd_page(pmd)                   virt_to_page((void *)__pmd_page(pmd))
 633 #define pud_page_vaddr(pud)             \
 634         ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
 635 #define pud_page(pud)                   virt_to_page((void *)pud_page_vaddr(pud))
 636 #define pmd_none(pmd)                   (!pmd_val(pmd))
 637 #define pmd_bad(pmd)                    (0)
 638 #define pmd_present(pmd)                (pmd_val(pmd) != 0U)
 639 #define pmd_clear(pmdp)                 (pmd_val(*(pmdp)) = 0U)
 640 #define pud_none(pud)                   (!pud_val(pud))
 641 #define pud_bad(pud)                    (0)
 642 #define pud_present(pud)                (pud_val(pud) != 0U)
 643 #define pud_clear(pudp)                 (pud_val(*(pudp)) = 0U)
 644
 645 /* Same in both SUN4V and SUN4U.  */
 646 #define pte_none(pte)                   (!pte_val(pte))
 647
 648 /* to find an entry in a page-table-directory. */
 649 #define pgd_index(address)      (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
 650 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
 651
 652 /* to find an entry in a kernel page-table-directory */
 653 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
 654
 655 /* Find an entry in the second-level page table.. */
 656 #define pmd_offset(pudp, address)       \
 657         ((pmd_t *) pud_page_vaddr(*(pudp)) + \
 658          (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
 659
 660 /* Find an entry in the third-level page table.. */
 661 #define pte_index(dir, address) \
 662         ((pte_t *) __pmd_page(*(dir)) + \
 663          ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 664 #define pte_offset_kernel               pte_index
 665 #define pte_offset_map                  pte_index
 666 #define pte_offset_map_nested           pte_index
 667 #define pte_unmap(pte)                  do { } while (0)
 668 #define pte_unmap_nested(pte)           do { } while (0)
 669
 670 /* Actual page table PTE updates.  */
 671 extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig);
 672
 673 static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
 674 {
 675         pte_t orig = *ptep;
 676
 677         *ptep = pte;
 678
 679         /* It is more efficient to let flush_tlb_kernel_range()
 680          * handle init_mm tlb flushes.
 681          *
 682          * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
 683          *             and SUN4V pte layout, so this inline test is fine.
 684          */
 685         if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
 686                 tlb_batch_add(mm, addr, ptep, orig);
 687 }
 688
 689 #define pte_clear(mm,addr,ptep)         \
 690         set_pte_at((mm), (addr), (ptep), __pte(0UL))
 691
 692 #ifdef DCACHE_ALIASING_POSSIBLE
 693 #define __HAVE_ARCH_MOVE_PTE
 694 #define move_pte(pte, prot, old_addr, new_addr)                         \
 695 ({                                                                      \
 696         pte_t newpte = (pte);                                           \
 697         if (tlb_type != hypervisor && pte_present(pte)) {               \
 698                 unsigned long this_pfn = pte_pfn(pte);                  \
 699                                                                         \
 700                 if (pfn_valid(this_pfn) &&                              \
 701                     (((old_addr) ^ (new_addr)) & (1 << 13)))            \
 702                         flush_dcache_page_all(current->mm,              \
 703                                               pfn_to_page(this_pfn));   \
 704         }                                                               \
 705         newpte;                                                         \
 706 })
 707 #endif
 708
 709 extern pgd_t swapper_pg_dir[2048];
 710 extern pmd_t swapper_low_pmd_dir[2048];
 711
 712 extern void paging_init(void);
 713 extern unsigned long find_ecache_flush_span(unsigned long size);
 714
 715 /* These do nothing with the way I have things setup. */
 716 #define mmu_lockarea(vaddr, len)                (vaddr)
 717 #define mmu_unlockarea(vaddr, len)              do { } while(0)
 718
 719 struct vm_area_struct;
 720 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
 721
 722 /* Encode and de-code a swap entry */
 723 #define __swp_type(entry)       (((entry).val >> PAGE_SHIFT) & 0xffUL)
 724 #define __swp_offset(entry)     ((entry).val >> (PAGE_SHIFT + 8UL))
 725 #define __swp_entry(type, offset)       \
 726         ( (swp_entry_t) \
 727           { \
 728                 (((long)(type) << PAGE_SHIFT) | \
 729                  ((long)(offset) << (PAGE_SHIFT + 8UL))) \
 730           } )
 731 #define __pte_to_swp_entry(pte)         ((swp_entry_t) { pte_val(pte) })
 732 #define __swp_entry_to_pte(x)           ((pte_t) { (x).val })
 733
 734 /* File offset in PTE support. */
 735 extern unsigned long pte_file(pte_t);
 736 #define pte_to_pgoff(pte)       (pte_val(pte) >> PAGE_SHIFT)
 737 extern pte_t pgoff_to_pte(unsigned long);
 738 #define PTE_FILE_MAX_BITS       (64UL - PAGE_SHIFT - 1UL)
 739
 740 extern unsigned long prom_virt_to_phys(unsigned long, int *);
 741
 742 extern unsigned long sun4u_get_pte(unsigned long);
 743
 744 static inline unsigned long __get_phys(unsigned long addr)
 745 {
 746         return sun4u_get_pte(addr);
 747 }
 748
 749 static inline int __get_iospace(unsigned long addr)
 750 {
 751         return ((sun4u_get_pte(addr) & 0xf0000000) >> 28);
 752 }
 753
 754 extern unsigned long *sparc64_valid_addr_bitmap;
 755
 756 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 757 #define kern_addr_valid(addr)   \
 758         (test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap))
 759
 760 extern int page_in_phys_avail(unsigned long paddr);
 761
 762 extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 763                                unsigned long pfn,
 764                                unsigned long size, pgprot_t prot);
 765
 766 /*
 767  * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
 768  * its high 4 bits.  These macros/functions put it there or get it from there.
 769  */
 770 #define MK_IOSPACE_PFN(space, pfn)      (pfn | (space << (BITS_PER_LONG - 4)))
 771 #define GET_IOSPACE(pfn)                (pfn >> (BITS_PER_LONG - 4))
 772 #define GET_PFN(pfn)                    (pfn & 0x0fffffffffffffffUL)
 773
 774 #include <asm-generic/pgtable.h>
 775
 776 /* We provide our own get_unmapped_area to cope with VA holes and
 777  * SHM area cache aliasing for userland.
 778  */
 779 #define HAVE_ARCH_UNMAPPED_AREA
 780 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
 781
 782 /* We provide a special get_unmapped_area for framebuffer mmaps to try and use
 783  * the largest alignment possible such that larget PTEs can be used.
 784  */
 785 extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
 786                                           unsigned long, unsigned long,
 787                                           unsigned long);
 788 #define HAVE_ARCH_FB_UNMAPPED_AREA
 789
 790 extern void pgtable_cache_init(void);
 791 extern void sun4v_register_fault_status(void);
 792 extern void sun4v_ktsb_register(void);
 793
 794 #endif /* !(__ASSEMBLY__) */
 795
 796 #endif /* !(_SPARC64_PGTABLE_H) */