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 #define _PAGE_SPECIAL     _AC(0x0200000000000000,UL) /* Special page         */
  99
 100 /* Advertise support for _PAGE_SPECIAL */
 101 #define __HAVE_ARCH_PTE_SPECIAL
 102
 103 /* SUN4U pte bits... */
 104 #define _PAGE_SZ4MB_4U    _AC(0x6000000000000000,UL) /* 4MB Page             */
 105 #define _PAGE_SZ512K_4U   _AC(0x4000000000000000,UL) /* 512K Page            */
 106 #define _PAGE_SZ64K_4U    _AC(0x2000000000000000,UL) /* 64K Page             */
 107 #define _PAGE_SZ8K_4U     _AC(0x0000000000000000,UL) /* 8K Page              */
 108 #define _PAGE_NFO_4U      _AC(0x1000000000000000,UL) /* No Fault Only        */
 109 #define _PAGE_IE_4U       _AC(0x0800000000000000,UL) /* Invert Endianness    */
 110 #define _PAGE_SOFT2_4U    _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
 111 #define _PAGE_SPECIAL_4U  _AC(0x0200000000000000,UL) /* Special page         */
 112 #define _PAGE_RES1_4U     _AC(0x0002000000000000,UL) /* Reserved             */
 113 #define _PAGE_SZ32MB_4U   _AC(0x0001000000000000,UL) /* (Panther) 32MB page  */
 114 #define _PAGE_SZ256MB_4U  _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
 115 #define _PAGE_SZALL_4U    _AC(0x6001000000000000,UL) /* All pgsz bits        */
 116 #define _PAGE_SN_4U       _AC(0x0000800000000000,UL) /* (Cheetah) Snoop      */
 117 #define _PAGE_RES2_4U     _AC(0x0000780000000000,UL) /* Reserved             */
 118 #define _PAGE_PADDR_4U    _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13]  */
 119 #define _PAGE_SOFT_4U     _AC(0x0000000000001F80,UL) /* Software bits:       */
 120 #define _PAGE_EXEC_4U     _AC(0x0000000000001000,UL) /* Executable SW bit    */
 121 #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty)     */
 122 #define _PAGE_FILE_4U     _AC(0x0000000000000800,UL) /* Pagecache page       */
 123 #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd)     */
 124 #define _PAGE_READ_4U     _AC(0x0000000000000200,UL) /* Readable SW Bit      */
 125 #define _PAGE_WRITE_4U    _AC(0x0000000000000100,UL) /* Writable SW Bit      */
 126 #define _PAGE_PRESENT_4U  _AC(0x0000000000000080,UL) /* Present              */
 127 #define _PAGE_L_4U        _AC(0x0000000000000040,UL) /* Locked TTE           */
 128 #define _PAGE_CP_4U       _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
 129 #define _PAGE_CV_4U       _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
 130 #define _PAGE_E_4U        _AC(0x0000000000000008,UL) /* side-Effect          */
 131 #define _PAGE_P_4U        _AC(0x0000000000000004,UL) /* Privileged Page      */
 132 #define _PAGE_W_4U        _AC(0x0000000000000002,UL) /* Writable             */
 133
 134 /* SUN4V pte bits... */
 135 #define _PAGE_NFO_4V      _AC(0x4000000000000000,UL) /* No Fault Only        */
 136 #define _PAGE_SOFT2_4V    _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
 137 #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty)     */
 138 #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd)     */
 139 #define _PAGE_READ_4V     _AC(0x0800000000000000,UL) /* Readable SW Bit      */
 140 #define _PAGE_WRITE_4V    _AC(0x0400000000000000,UL) /* Writable SW Bit      */
 141 #define _PAGE_SPECIAL_4V  _AC(0x0200000000000000,UL) /* Special page         */
 142 #define _PAGE_PADDR_4V    _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13]         */
 143 #define _PAGE_IE_4V       _AC(0x0000000000001000,UL) /* Invert Endianness    */
 144 #define _PAGE_E_4V        _AC(0x0000000000000800,UL) /* side-Effect          */
 145 #define _PAGE_CP_4V       _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
 146 #define _PAGE_CV_4V       _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
 147 #define _PAGE_P_4V        _AC(0x0000000000000100,UL) /* Privileged Page      */
 148 #define _PAGE_EXEC_4V     _AC(0x0000000000000080,UL) /* Executable Page      */
 149 #define _PAGE_W_4V        _AC(0x0000000000000040,UL) /* Writable             */
 150 #define _PAGE_SOFT_4V     _AC(0x0000000000000030,UL) /* Software bits        */
 151 #define _PAGE_FILE_4V     _AC(0x0000000000000020,UL) /* Pagecache page       */
 152 #define _PAGE_PRESENT_4V  _AC(0x0000000000000010,UL) /* Present              */
 153 #define _PAGE_RESV_4V     _AC(0x0000000000000008,UL) /* Reserved             */
 154 #define _PAGE_SZ16GB_4V   _AC(0x0000000000000007,UL) /* 16GB Page            */
 155 #define _PAGE_SZ2GB_4V    _AC(0x0000000000000006,UL) /* 2GB Page             */
 156 #define _PAGE_SZ256MB_4V  _AC(0x0000000000000005,UL) /* 256MB Page           */
 157 #define _PAGE_SZ32MB_4V   _AC(0x0000000000000004,UL) /* 32MB Page            */
 158 #define _PAGE_SZ4MB_4V    _AC(0x0000000000000003,UL) /* 4MB Page             */
 159 #define _PAGE_SZ512K_4V   _AC(0x0000000000000002,UL) /* 512K Page            */
 160 #define _PAGE_SZ64K_4V    _AC(0x0000000000000001,UL) /* 64K Page             */
 161 #define _PAGE_SZ8K_4V     _AC(0x0000000000000000,UL) /* 8K Page              */
 162 #define _PAGE_SZALL_4V    _AC(0x0000000000000007,UL) /* All pgsz bits        */
 163
 164 #if PAGE_SHIFT == 13
 165 #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
 166 #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
 167 #elif PAGE_SHIFT == 16
 168 #define _PAGE_SZBITS_4U _PAGE_SZ64K_4U
 169 #define _PAGE_SZBITS_4V _PAGE_SZ64K_4V
 170 #else
 171 #error Wrong PAGE_SHIFT specified
 172 #endif
 173
 174 #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
 175 #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
 176 #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
 177 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
 178 #define _PAGE_SZHUGE_4U _PAGE_SZ512K_4U
 179 #define _PAGE_SZHUGE_4V _PAGE_SZ512K_4V
 180 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
 181 #define _PAGE_SZHUGE_4U _PAGE_SZ64K_4U
 182 #define _PAGE_SZHUGE_4V _PAGE_SZ64K_4V
 183 #endif
 184
 185 /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
 186 #define __P000  __pgprot(0)
 187 #define __P001  __pgprot(0)
 188 #define __P010  __pgprot(0)
 189 #define __P011  __pgprot(0)
 190 #define __P100  __pgprot(0)
 191 #define __P101  __pgprot(0)
 192 #define __P110  __pgprot(0)
 193 #define __P111  __pgprot(0)
 194
 195 #define __S000  __pgprot(0)
 196 #define __S001  __pgprot(0)
 197 #define __S010  __pgprot(0)
 198 #define __S011  __pgprot(0)
 199 #define __S100  __pgprot(0)
 200 #define __S101  __pgprot(0)
 201 #define __S110  __pgprot(0)
 202 #define __S111  __pgprot(0)
 203
 204 #ifndef __ASSEMBLY__
 205
 206 extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
 207
 208 extern unsigned long pte_sz_bits(unsigned long size);
 209
 210 extern pgprot_t PAGE_KERNEL;
 211 extern pgprot_t PAGE_KERNEL_LOCKED;
 212 extern pgprot_t PAGE_COPY;
 213 extern pgprot_t PAGE_SHARED;
 214
 215 /* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
 216 extern unsigned long _PAGE_IE;
 217 extern unsigned long _PAGE_E;
 218 extern unsigned long _PAGE_CACHE;
 219
 220 extern unsigned long pg_iobits;
 221 extern unsigned long _PAGE_ALL_SZ_BITS;
 222 extern unsigned long _PAGE_SZBITS;
 223
 224 extern struct page *mem_map_zero;
 225 #define ZERO_PAGE(vaddr)        (mem_map_zero)
 226
 227 /* PFNs are real physical page numbers.  However, mem_map only begins to record
 228  * per-page information starting at pfn_base.  This is to handle systems where
 229  * the first physical page in the machine is at some huge physical address,
 230  * such as 4GB.   This is common on a partitioned E10000, for example.
 231  */
 232 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
 233 {
 234         unsigned long paddr = pfn << PAGE_SHIFT;
 235         unsigned long sz_bits;
 236
 237         sz_bits = 0UL;
 238         if (_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL) {
 239                 __asm__ __volatile__(
 240                 "\n661: sethi           %%uhi(%1), %0\n"
 241                 "       sllx            %0, 32, %0\n"
 242                 "       .section        .sun4v_2insn_patch, \"ax\"\n"
 243                 "       .word           661b\n"
 244                 "       mov             %2, %0\n"
 245                 "       nop\n"
 246                 "       .previous\n"
 247                 : "=r" (sz_bits)
 248                 : "i" (_PAGE_SZBITS_4U), "i" (_PAGE_SZBITS_4V));
 249         }
 250         return __pte(paddr | sz_bits | pgprot_val(prot));
 251 }
 252 #define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
 253
 254 /* This one can be done with two shifts.  */
 255 static inline unsigned long pte_pfn(pte_t pte)
 256 {
 257         unsigned long ret;
 258
 259         __asm__ __volatile__(
 260         "\n661: sllx            %1, %2, %0\n"
 261         "       srlx            %0, %3, %0\n"
 262         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 263         "       .word           661b\n"
 264         "       sllx            %1, %4, %0\n"
 265         "       srlx            %0, %5, %0\n"
 266         "       .previous\n"
 267         : "=r" (ret)
 268         : "r" (pte_val(pte)),
 269           "i" (21), "i" (21 + PAGE_SHIFT),
 270           "i" (8), "i" (8 + PAGE_SHIFT));
 271
 272         return ret;
 273 }
 274 #define pte_page(x) pfn_to_page(pte_pfn(x))
 275
 276 static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
 277 {
 278         unsigned long mask, tmp;
 279
 280         /* SUN4U: 0x600307ffffffecb8 (negated == 0x9ffcf80000001347)
 281          * SUN4V: 0x30ffffffffffee17 (negated == 0xcf000000000011e8)
 282          *
 283          * Even if we use negation tricks the result is still a 6
 284          * instruction sequence, so don't try to play fancy and just
 285          * do the most straightforward implementation.
 286          *
 287          * Note: We encode this into 3 sun4v 2-insn patch sequences.
 288          */
 289
 290         __asm__ __volatile__(
 291         "\n661: sethi           %%uhi(%2), %1\n"
 292         "       sethi           %%hi(%2), %0\n"
 293         "\n662: or              %1, %%ulo(%2), %1\n"
 294         "       or              %0, %%lo(%2), %0\n"
 295         "\n663: sllx            %1, 32, %1\n"
 296         "       or              %0, %1, %0\n"
 297         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 298         "       .word           661b\n"
 299         "       sethi           %%uhi(%3), %1\n"
 300         "       sethi           %%hi(%3), %0\n"
 301         "       .word           662b\n"
 302         "       or              %1, %%ulo(%3), %1\n"
 303         "       or              %0, %%lo(%3), %0\n"
 304         "       .word           663b\n"
 305         "       sllx            %1, 32, %1\n"
 306         "       or              %0, %1, %0\n"
 307         "       .previous\n"
 308         : "=r" (mask), "=r" (tmp)
 309         : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
 310                _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U | _PAGE_PRESENT_4U |
 311                _PAGE_SZBITS_4U | _PAGE_SPECIAL),
 312           "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
 313                _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V | _PAGE_PRESENT_4V |
 314                _PAGE_SZBITS_4V | _PAGE_SPECIAL));
 315
 316         return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
 317 }
 318
 319 static inline pte_t pgoff_to_pte(unsigned long off)
 320 {
 321         off <<= PAGE_SHIFT;
 322
 323         __asm__ __volatile__(
 324         "\n661: or              %0, %2, %0\n"
 325         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 326         "       .word           661b\n"
 327         "       or              %0, %3, %0\n"
 328         "       .previous\n"
 329         : "=r" (off)
 330         : "0" (off), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
 331
 332         return __pte(off);
 333 }
 334
 335 static inline pgprot_t pgprot_noncached(pgprot_t prot)
 336 {
 337         unsigned long val = pgprot_val(prot);
 338
 339         __asm__ __volatile__(
 340         "\n661: andn            %0, %2, %0\n"
 341         "       or              %0, %3, %0\n"
 342         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 343         "       .word           661b\n"
 344         "       andn            %0, %4, %0\n"
 345         "       or              %0, %5, %0\n"
 346         "       .previous\n"
 347         : "=r" (val)
 348         : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
 349                      "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V));
 350
 351         return __pgprot(val);
 352 }
 353 /* Various pieces of code check for platform support by ifdef testing
 354  * on "pgprot_noncached".  That's broken and should be fixed, but for
 355  * now...
 356  */
 357 #define pgprot_noncached pgprot_noncached
 358
 359 #ifdef CONFIG_HUGETLB_PAGE
 360 static inline pte_t pte_mkhuge(pte_t pte)
 361 {
 362         unsigned long mask;
 363
 364         __asm__ __volatile__(
 365         "\n661: sethi           %%uhi(%1), %0\n"
 366         "       sllx            %0, 32, %0\n"
 367         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 368         "       .word           661b\n"
 369         "       mov             %2, %0\n"
 370         "       nop\n"
 371         "       .previous\n"
 372         : "=r" (mask)
 373         : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
 374
 375         return __pte(pte_val(pte) | mask);
 376 }
 377 #endif
 378
 379 static inline pte_t pte_mkdirty(pte_t pte)
 380 {
 381         unsigned long val = pte_val(pte), tmp;
 382
 383         __asm__ __volatile__(
 384         "\n661: or              %0, %3, %0\n"
 385         "       nop\n"
 386         "\n662: nop\n"
 387         "       nop\n"
 388         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 389         "       .word           661b\n"
 390         "       sethi           %%uhi(%4), %1\n"
 391         "       sllx            %1, 32, %1\n"
 392         "       .word           662b\n"
 393         "       or              %1, %%lo(%4), %1\n"
 394         "       or              %0, %1, %0\n"
 395         "       .previous\n"
 396         : "=r" (val), "=r" (tmp)
 397         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 398           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 399
 400         return __pte(val);
 401 }
 402
 403 static inline pte_t pte_mkclean(pte_t pte)
 404 {
 405         unsigned long val = pte_val(pte), tmp;
 406
 407         __asm__ __volatile__(
 408         "\n661: andn            %0, %3, %0\n"
 409         "       nop\n"
 410         "\n662: nop\n"
 411         "       nop\n"
 412         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 413         "       .word           661b\n"
 414         "       sethi           %%uhi(%4), %1\n"
 415         "       sllx            %1, 32, %1\n"
 416         "       .word           662b\n"
 417         "       or              %1, %%lo(%4), %1\n"
 418         "       andn            %0, %1, %0\n"
 419         "       .previous\n"
 420         : "=r" (val), "=r" (tmp)
 421         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 422           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 423
 424         return __pte(val);
 425 }
 426
 427 static inline pte_t pte_mkwrite(pte_t pte)
 428 {
 429         unsigned long val = pte_val(pte), mask;
 430
 431         __asm__ __volatile__(
 432         "\n661: mov             %1, %0\n"
 433         "       nop\n"
 434         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 435         "       .word           661b\n"
 436         "       sethi           %%uhi(%2), %0\n"
 437         "       sllx            %0, 32, %0\n"
 438         "       .previous\n"
 439         : "=r" (mask)
 440         : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
 441
 442         return __pte(val | mask);
 443 }
 444
 445 static inline pte_t pte_wrprotect(pte_t pte)
 446 {
 447         unsigned long val = pte_val(pte), tmp;
 448
 449         __asm__ __volatile__(
 450         "\n661: andn            %0, %3, %0\n"
 451         "       nop\n"
 452         "\n662: nop\n"
 453         "       nop\n"
 454         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 455         "       .word           661b\n"
 456         "       sethi           %%uhi(%4), %1\n"
 457         "       sllx            %1, 32, %1\n"
 458         "       .word           662b\n"
 459         "       or              %1, %%lo(%4), %1\n"
 460         "       andn            %0, %1, %0\n"
 461         "       .previous\n"
 462         : "=r" (val), "=r" (tmp)
 463         : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
 464           "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
 465
 466         return __pte(val);
 467 }
 468
 469 static inline pte_t pte_mkold(pte_t pte)
 470 {
 471         unsigned long mask;
 472
 473         __asm__ __volatile__(
 474         "\n661: mov             %1, %0\n"
 475         "       nop\n"
 476         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 477         "       .word           661b\n"
 478         "       sethi           %%uhi(%2), %0\n"
 479         "       sllx            %0, 32, %0\n"
 480         "       .previous\n"
 481         : "=r" (mask)
 482         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 483
 484         mask |= _PAGE_R;
 485
 486         return __pte(pte_val(pte) & ~mask);
 487 }
 488
 489 static inline pte_t pte_mkyoung(pte_t pte)
 490 {
 491         unsigned long 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_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 503
 504         mask |= _PAGE_R;
 505
 506         return __pte(pte_val(pte) | mask);
 507 }
 508
 509 static inline pte_t pte_mkspecial(pte_t pte)
 510 {
 511         pte_val(pte) |= _PAGE_SPECIAL;
 512         return pte;
 513 }
 514
 515 static inline unsigned long pte_young(pte_t pte)
 516 {
 517         unsigned long mask;
 518
 519         __asm__ __volatile__(
 520         "\n661: mov             %1, %0\n"
 521         "       nop\n"
 522         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 523         "       .word           661b\n"
 524         "       sethi           %%uhi(%2), %0\n"
 525         "       sllx            %0, 32, %0\n"
 526         "       .previous\n"
 527         : "=r" (mask)
 528         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 529
 530         return (pte_val(pte) & mask);
 531 }
 532
 533 static inline unsigned long pte_dirty(pte_t pte)
 534 {
 535         unsigned long mask;
 536
 537         __asm__ __volatile__(
 538         "\n661: mov             %1, %0\n"
 539         "       nop\n"
 540         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 541         "       .word           661b\n"
 542         "       sethi           %%uhi(%2), %0\n"
 543         "       sllx            %0, 32, %0\n"
 544         "       .previous\n"
 545         : "=r" (mask)
 546         : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
 547
 548         return (pte_val(pte) & mask);
 549 }
 550
 551 static inline unsigned long pte_write(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_WRITE_4U), "i" (_PAGE_WRITE_4V));
 565
 566         return (pte_val(pte) & mask);
 567 }
 568
 569 static inline unsigned long pte_exec(pte_t pte)
 570 {
 571         unsigned long mask;
 572
 573         __asm__ __volatile__(
 574         "\n661: sethi           %%hi(%1), %0\n"
 575         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 576         "       .word           661b\n"
 577         "       mov             %2, %0\n"
 578         "       .previous\n"
 579         : "=r" (mask)
 580         : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
 581
 582         return (pte_val(pte) & mask);
 583 }
 584
 585 static inline unsigned long pte_file(pte_t pte)
 586 {
 587         unsigned long val = pte_val(pte);
 588
 589         __asm__ __volatile__(
 590         "\n661: and             %0, %2, %0\n"
 591         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 592         "       .word           661b\n"
 593         "       and             %0, %3, %0\n"
 594         "       .previous\n"
 595         : "=r" (val)
 596         : "0" (val), "i" (_PAGE_FILE_4U), "i" (_PAGE_FILE_4V));
 597
 598         return val;
 599 }
 600
 601 static inline unsigned long pte_present(pte_t pte)
 602 {
 603         unsigned long val = pte_val(pte);
 604
 605         __asm__ __volatile__(
 606         "\n661: and             %0, %2, %0\n"
 607         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 608         "       .word           661b\n"
 609         "       and             %0, %3, %0\n"
 610         "       .previous\n"
 611         : "=r" (val)
 612         : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
 613
 614         return val;
 615 }
 616
 617 static inline unsigned long pte_special(pte_t pte)
 618 {
 619         return pte_val(pte) & _PAGE_SPECIAL;
 620 }
 621
 622 #define pmd_set(pmdp, ptep)     \
 623         (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
 624 #define pud_set(pudp, pmdp)     \
 625         (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
 626 #define __pmd_page(pmd)         \
 627         ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
 628 #define pmd_page(pmd)                   virt_to_page((void *)__pmd_page(pmd))
 629 #define pud_page_vaddr(pud)             \
 630         ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
 631 #define pud_page(pud)                   virt_to_page((void *)pud_page_vaddr(pud))
 632 #define pmd_none(pmd)                   (!pmd_val(pmd))
 633 #define pmd_bad(pmd)                    (0)
 634 #define pmd_present(pmd)                (pmd_val(pmd) != 0U)
 635 #define pmd_clear(pmdp)                 (pmd_val(*(pmdp)) = 0U)
 636 #define pud_none(pud)                   (!pud_val(pud))
 637 #define pud_bad(pud)                    (0)
 638 #define pud_present(pud)                (pud_val(pud) != 0U)
 639 #define pud_clear(pudp)                 (pud_val(*(pudp)) = 0U)
 640
 641 /* Same in both SUN4V and SUN4U.  */
 642 #define pte_none(pte)                   (!pte_val(pte))
 643
 644 /* to find an entry in a page-table-directory. */
 645 #define pgd_index(address)      (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
 646 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
 647
 648 /* to find an entry in a kernel page-table-directory */
 649 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
 650
 651 /* Find an entry in the second-level page table.. */
 652 #define pmd_offset(pudp, address)       \
 653         ((pmd_t *) pud_page_vaddr(*(pudp)) + \
 654          (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
 655
 656 /* Find an entry in the third-level page table.. */
 657 #define pte_index(dir, address) \
 658         ((pte_t *) __pmd_page(*(dir)) + \
 659          ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 660 #define pte_offset_kernel               pte_index
 661 #define pte_offset_map                  pte_index
 662 #define pte_unmap(pte)                  do { } while (0)
 663
 664 /* Actual page table PTE updates.  */
 665 extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
 666                           pte_t *ptep, pte_t orig, int fullmm);
 667
 668 static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
 669                              pte_t *ptep, pte_t pte, int fullmm)
 670 {
 671         pte_t orig = *ptep;
 672
 673         *ptep = pte;
 674
 675         /* It is more efficient to let flush_tlb_kernel_range()
 676          * handle init_mm tlb flushes.
 677          *
 678          * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
 679          *             and SUN4V pte layout, so this inline test is fine.
 680          */
 681         if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID))
 682                 tlb_batch_add(mm, addr, ptep, orig, fullmm);
 683 }
 684
 685 #define set_pte_at(mm,addr,ptep,pte)    \
 686         __set_pte_at((mm), (addr), (ptep), (pte), 0)
 687
 688 #define pte_clear(mm,addr,ptep)         \
 689         set_pte_at((mm), (addr), (ptep), __pte(0UL))
 690
 691 #define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
 692 #define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
 693         __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
 694
 695 #ifdef DCACHE_ALIASING_POSSIBLE
 696 #define __HAVE_ARCH_MOVE_PTE
 697 #define move_pte(pte, prot, old_addr, new_addr)                         \
 698 ({                                                                      \
 699         pte_t newpte = (pte);                                           \
 700         if (tlb_type != hypervisor && pte_present(pte)) {               \
 701                 unsigned long this_pfn = pte_pfn(pte);                  \
 702                                                                         \
 703                 if (pfn_valid(this_pfn) &&                              \
 704                     (((old_addr) ^ (new_addr)) & (1 << 13)))            \
 705                         flush_dcache_page_all(current->mm,              \
 706                                               pfn_to_page(this_pfn));   \
 707         }                                                               \
 708         newpte;                                                         \
 709 })
 710 #endif
 711
 712 extern pgd_t swapper_pg_dir[2048];
 713 extern pmd_t swapper_low_pmd_dir[2048];
 714
 715 extern void paging_init(void);
 716 extern unsigned long find_ecache_flush_span(unsigned long size);
 717
 718 struct seq_file;
 719 extern void mmu_info(struct seq_file *);
 720
 721 /* These do nothing with the way I have things setup. */
 722 #define mmu_lockarea(vaddr, len)                (vaddr)
 723 #define mmu_unlockarea(vaddr, len)              do { } while(0)
 724
 725 struct vm_area_struct;
 726 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
 727
 728 /* Encode and de-code a swap entry */
 729 #define __swp_type(entry)       (((entry).val >> PAGE_SHIFT) & 0xffUL)
 730 #define __swp_offset(entry)     ((entry).val >> (PAGE_SHIFT + 8UL))
 731 #define __swp_entry(type, offset)       \
 732         ( (swp_entry_t) \
 733           { \
 734                 (((long)(type) << PAGE_SHIFT) | \
 735                  ((long)(offset) << (PAGE_SHIFT + 8UL))) \
 736           } )
 737 #define __pte_to_swp_entry(pte)         ((swp_entry_t) { pte_val(pte) })
 738 #define __swp_entry_to_pte(x)           ((pte_t) { (x).val })
 739
 740 /* File offset in PTE support. */
 741 extern unsigned long pte_file(pte_t);
 742 #define pte_to_pgoff(pte)       (pte_val(pte) >> PAGE_SHIFT)
 743 extern pte_t pgoff_to_pte(unsigned long);
 744 #define PTE_FILE_MAX_BITS       (64UL - PAGE_SHIFT - 1UL)
 745
 746 extern unsigned long sparc64_valid_addr_bitmap[];
 747
 748 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 749 static inline bool kern_addr_valid(unsigned long addr)
 750 {
 751         unsigned long paddr = __pa(addr);
 752
 753         if ((paddr >> 41UL) != 0UL)
 754                 return false;
 755         return test_bit(paddr >> 22, sparc64_valid_addr_bitmap);
 756 }
 757
 758 extern int page_in_phys_avail(unsigned long paddr);
 759
 760 extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 761                                unsigned long pfn,
 762                                unsigned long size, pgprot_t prot);
 763
 764 /*
 765  * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
 766  * its high 4 bits.  These macros/functions put it there or get it from there.
 767  */
 768 #define MK_IOSPACE_PFN(space, pfn)      (pfn | (space << (BITS_PER_LONG - 4)))
 769 #define GET_IOSPACE(pfn)                (pfn >> (BITS_PER_LONG - 4))
 770 #define GET_PFN(pfn)                    (pfn & 0x0fffffffffffffffUL)
 771
 772 #include <asm-generic/pgtable.h>
 773
 774 /* We provide our own get_unmapped_area to cope with VA holes and
 775  * SHM area cache aliasing for userland.
 776  */
 777 #define HAVE_ARCH_UNMAPPED_AREA
 778 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
 779
 780 /* We provide a special get_unmapped_area for framebuffer mmaps to try and use
 781  * the largest alignment possible such that larget PTEs can be used.
 782  */
 783 extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
 784                                           unsigned long, unsigned long,
 785                                           unsigned long);
 786 #define HAVE_ARCH_FB_UNMAPPED_AREA
 787
 788 extern void pgtable_cache_init(void);
 789 extern void sun4v_register_fault_status(void);
 790 extern void sun4v_ktsb_register(void);
 791 extern void __init cheetah_ecache_flush_init(void);
 792 extern void sun4v_patch_tlb_handlers(void);
 793
 794 extern unsigned long cmdline_memory_size;
 795
 796 extern asmlinkage void do_sparc64_fault(struct pt_regs *regs);
 797
 798 #endif /* !(__ASSEMBLY__) */
 799
 800 #endif /* !(_SPARC64_PGTABLE_H) */