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/5level-fixup.h>
  16 #include <linux/compiler.h>
  17 #include <linux/const.h>
  18 #include <asm/types.h>
  19 #include <asm/spitfire.h>
  20 #include <asm/asi.h>
  21 #include <asm/page.h>
  22 #include <asm/processor.h>
  23
  24 /* The kernel image occupies 0x4000000 to 0x6000000 (4MB --> 96MB).
  25  * The page copy blockops can use 0x6000000 to 0x8000000.
  26  * The 8K TSB is mapped in the 0x8000000 to 0x8400000 range.
  27  * The 4M TSB is mapped in the 0x8400000 to 0x8800000 range.
  28  * The PROM resides in an area spanning 0xf0000000 to 0x100000000.
  29  * The vmalloc area spans 0x100000000 to 0x200000000.
  30  * Since modules need to be in the lowest 32-bits of the address space,
  31  * we place them right before the OBP area from 0x10000000 to 0xf0000000.
  32  * There is a single static kernel PMD which maps from 0x0 to address
  33  * 0x400000000.
  34  */
  35 #define TLBTEMP_BASE            _AC(0x0000000006000000,UL)
  36 #define TSBMAP_8K_BASE          _AC(0x0000000008000000,UL)
  37 #define TSBMAP_4M_BASE          _AC(0x0000000008400000,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 VMEMMAP_BASE            VMALLOC_END
  45
  46 /* PMD_SHIFT determines the size of the area a second-level page
  47  * table can map
  48  */
  49 #define PMD_SHIFT       (PAGE_SHIFT + (PAGE_SHIFT-3))
  50 #define PMD_SIZE        (_AC(1,UL) << PMD_SHIFT)
  51 #define PMD_MASK        (~(PMD_SIZE-1))
  52 #define PMD_BITS        (PAGE_SHIFT - 3)
  53
  54 /* PUD_SHIFT determines the size of the area a third-level page
  55  * table can map
  56  */
  57 #define PUD_SHIFT       (PMD_SHIFT + PMD_BITS)
  58 #define PUD_SIZE        (_AC(1,UL) << PUD_SHIFT)
  59 #define PUD_MASK        (~(PUD_SIZE-1))
  60 #define PUD_BITS        (PAGE_SHIFT - 3)
  61
  62 /* PGDIR_SHIFT determines what a fourth-level page table entry can map */
  63 #define PGDIR_SHIFT     (PUD_SHIFT + PUD_BITS)
  64 #define PGDIR_SIZE      (_AC(1,UL) << PGDIR_SHIFT)
  65 #define PGDIR_MASK      (~(PGDIR_SIZE-1))
  66 #define PGDIR_BITS      (PAGE_SHIFT - 3)
  67
  68 #if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS)
  69 #error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support
  70 #endif
  71
  72 #if (PGDIR_SHIFT + PGDIR_BITS) != 53
  73 #error Page table parameters do not cover virtual address space properly.
  74 #endif
  75
  76 #if (PMD_SHIFT != HPAGE_SHIFT)
  77 #error PMD_SHIFT must equal HPAGE_SHIFT for transparent huge pages.
  78 #endif
  79
  80 #ifndef __ASSEMBLY__
  81
  82 extern unsigned long VMALLOC_END;
  83
  84 #define vmemmap                 ((struct page *)VMEMMAP_BASE)
  85
  86 #include <linux/sched.h>
  87
  88 bool kern_addr_valid(unsigned long addr);
  89
  90 /* Entries per page directory level. */
  91 #define PTRS_PER_PTE    (1UL << (PAGE_SHIFT-3))
  92 #define PTRS_PER_PMD    (1UL << PMD_BITS)
  93 #define PTRS_PER_PUD    (1UL << PUD_BITS)
  94 #define PTRS_PER_PGD    (1UL << PGDIR_BITS)
  95
  96 /* Kernel has a separate 44bit address space. */
  97 #define FIRST_USER_ADDRESS      0UL
  98
  99 #define pmd_ERROR(e)                                                    \
 100         pr_err("%s:%d: bad pmd %p(%016lx) seen at (%pS)\n",             \
 101                __FILE__, __LINE__, &(e), pmd_val(e), __builtin_return_address(0))
 102 #define pud_ERROR(e)                                                    \
 103         pr_err("%s:%d: bad pud %p(%016lx) seen at (%pS)\n",             \
 104                __FILE__, __LINE__, &(e), pud_val(e), __builtin_return_address(0))
 105 #define pgd_ERROR(e)                                                    \
 106         pr_err("%s:%d: bad pgd %p(%016lx) seen at (%pS)\n",             \
 107                __FILE__, __LINE__, &(e), pgd_val(e), __builtin_return_address(0))
 108
 109 #endif /* !(__ASSEMBLY__) */
 110
 111 /* PTE bits which are the same in SUN4U and SUN4V format.  */
 112 #define _PAGE_VALID       _AC(0x8000000000000000,UL) /* Valid TTE            */
 113 #define _PAGE_R           _AC(0x8000000000000000,UL) /* Keep ref bit uptodate*/
 114 #define _PAGE_SPECIAL     _AC(0x0200000000000000,UL) /* Special page         */
 115 #define _PAGE_PMD_HUGE    _AC(0x0100000000000000,UL) /* Huge page            */
 116 #define _PAGE_PUD_HUGE    _PAGE_PMD_HUGE
 117
 118 /* Advertise support for _PAGE_SPECIAL */
 119 #define __HAVE_ARCH_PTE_SPECIAL
 120
 121 /* SUN4U pte bits... */
 122 #define _PAGE_SZ4MB_4U    _AC(0x6000000000000000,UL) /* 4MB Page             */
 123 #define _PAGE_SZ512K_4U   _AC(0x4000000000000000,UL) /* 512K Page            */
 124 #define _PAGE_SZ64K_4U    _AC(0x2000000000000000,UL) /* 64K Page             */
 125 #define _PAGE_SZ8K_4U     _AC(0x0000000000000000,UL) /* 8K Page              */
 126 #define _PAGE_NFO_4U      _AC(0x1000000000000000,UL) /* No Fault Only        */
 127 #define _PAGE_IE_4U       _AC(0x0800000000000000,UL) /* Invert Endianness    */
 128 #define _PAGE_SOFT2_4U    _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
 129 #define _PAGE_SPECIAL_4U  _AC(0x0200000000000000,UL) /* Special page         */
 130 #define _PAGE_PMD_HUGE_4U _AC(0x0100000000000000,UL) /* Huge page            */
 131 #define _PAGE_RES1_4U     _AC(0x0002000000000000,UL) /* Reserved             */
 132 #define _PAGE_SZ32MB_4U   _AC(0x0001000000000000,UL) /* (Panther) 32MB page  */
 133 #define _PAGE_SZ256MB_4U  _AC(0x2001000000000000,UL) /* (Panther) 256MB page */
 134 #define _PAGE_SZALL_4U    _AC(0x6001000000000000,UL) /* All pgsz bits        */
 135 #define _PAGE_SN_4U       _AC(0x0000800000000000,UL) /* (Cheetah) Snoop      */
 136 #define _PAGE_RES2_4U     _AC(0x0000780000000000,UL) /* Reserved             */
 137 #define _PAGE_PADDR_4U    _AC(0x000007FFFFFFE000,UL) /* (Cheetah) pa[42:13]  */
 138 #define _PAGE_SOFT_4U     _AC(0x0000000000001F80,UL) /* Software bits:       */
 139 #define _PAGE_EXEC_4U     _AC(0x0000000000001000,UL) /* Executable SW bit    */
 140 #define _PAGE_MODIFIED_4U _AC(0x0000000000000800,UL) /* Modified (dirty)     */
 141 #define _PAGE_ACCESSED_4U _AC(0x0000000000000400,UL) /* Accessed (ref'd)     */
 142 #define _PAGE_READ_4U     _AC(0x0000000000000200,UL) /* Readable SW Bit      */
 143 #define _PAGE_WRITE_4U    _AC(0x0000000000000100,UL) /* Writable SW Bit      */
 144 #define _PAGE_PRESENT_4U  _AC(0x0000000000000080,UL) /* Present              */
 145 #define _PAGE_L_4U        _AC(0x0000000000000040,UL) /* Locked TTE           */
 146 #define _PAGE_CP_4U       _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
 147 #define _PAGE_CV_4U       _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
 148 #define _PAGE_E_4U        _AC(0x0000000000000008,UL) /* side-Effect          */
 149 #define _PAGE_P_4U        _AC(0x0000000000000004,UL) /* Privileged Page      */
 150 #define _PAGE_W_4U        _AC(0x0000000000000002,UL) /* Writable             */
 151
 152 /* SUN4V pte bits... */
 153 #define _PAGE_NFO_4V      _AC(0x4000000000000000,UL) /* No Fault Only        */
 154 #define _PAGE_SOFT2_4V    _AC(0x3F00000000000000,UL) /* Software bits, set 2 */
 155 #define _PAGE_MODIFIED_4V _AC(0x2000000000000000,UL) /* Modified (dirty)     */
 156 #define _PAGE_ACCESSED_4V _AC(0x1000000000000000,UL) /* Accessed (ref'd)     */
 157 #define _PAGE_READ_4V     _AC(0x0800000000000000,UL) /* Readable SW Bit      */
 158 #define _PAGE_WRITE_4V    _AC(0x0400000000000000,UL) /* Writable SW Bit      */
 159 #define _PAGE_SPECIAL_4V  _AC(0x0200000000000000,UL) /* Special page         */
 160 #define _PAGE_PMD_HUGE_4V _AC(0x0100000000000000,UL) /* Huge page            */
 161 #define _PAGE_PADDR_4V    _AC(0x00FFFFFFFFFFE000,UL) /* paddr[55:13]         */
 162 #define _PAGE_IE_4V       _AC(0x0000000000001000,UL) /* Invert Endianness    */
 163 #define _PAGE_E_4V        _AC(0x0000000000000800,UL) /* side-Effect          */
 164 #define _PAGE_CP_4V       _AC(0x0000000000000400,UL) /* Cacheable in P-Cache */
 165 #define _PAGE_CV_4V       _AC(0x0000000000000200,UL) /* Cacheable in V-Cache */
 166 #define _PAGE_P_4V        _AC(0x0000000000000100,UL) /* Privileged Page      */
 167 #define _PAGE_EXEC_4V     _AC(0x0000000000000080,UL) /* Executable Page      */
 168 #define _PAGE_W_4V        _AC(0x0000000000000040,UL) /* Writable             */
 169 #define _PAGE_SOFT_4V     _AC(0x0000000000000030,UL) /* Software bits        */
 170 #define _PAGE_PRESENT_4V  _AC(0x0000000000000010,UL) /* Present              */
 171 #define _PAGE_RESV_4V     _AC(0x0000000000000008,UL) /* Reserved             */
 172 #define _PAGE_SZ16GB_4V   _AC(0x0000000000000007,UL) /* 16GB Page            */
 173 #define _PAGE_SZ2GB_4V    _AC(0x0000000000000006,UL) /* 2GB Page             */
 174 #define _PAGE_SZ256MB_4V  _AC(0x0000000000000005,UL) /* 256MB Page           */
 175 #define _PAGE_SZ32MB_4V   _AC(0x0000000000000004,UL) /* 32MB Page            */
 176 #define _PAGE_SZ4MB_4V    _AC(0x0000000000000003,UL) /* 4MB Page             */
 177 #define _PAGE_SZ512K_4V   _AC(0x0000000000000002,UL) /* 512K Page            */
 178 #define _PAGE_SZ64K_4V    _AC(0x0000000000000001,UL) /* 64K Page             */
 179 #define _PAGE_SZ8K_4V     _AC(0x0000000000000000,UL) /* 8K Page              */
 180 #define _PAGE_SZALL_4V    _AC(0x0000000000000007,UL) /* All pgsz bits        */
 181
 182 #define _PAGE_SZBITS_4U _PAGE_SZ8K_4U
 183 #define _PAGE_SZBITS_4V _PAGE_SZ8K_4V
 184
 185 #if REAL_HPAGE_SHIFT != 22
 186 #error REAL_HPAGE_SHIFT and _PAGE_SZHUGE_foo must match up
 187 #endif
 188
 189 #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U
 190 #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V
 191
 192 /* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */
 193 #define __P000  __pgprot(0)
 194 #define __P001  __pgprot(0)
 195 #define __P010  __pgprot(0)
 196 #define __P011  __pgprot(0)
 197 #define __P100  __pgprot(0)
 198 #define __P101  __pgprot(0)
 199 #define __P110  __pgprot(0)
 200 #define __P111  __pgprot(0)
 201
 202 #define __S000  __pgprot(0)
 203 #define __S001  __pgprot(0)
 204 #define __S010  __pgprot(0)
 205 #define __S011  __pgprot(0)
 206 #define __S100  __pgprot(0)
 207 #define __S101  __pgprot(0)
 208 #define __S110  __pgprot(0)
 209 #define __S111  __pgprot(0)
 210
 211 #ifndef __ASSEMBLY__
 212
 213 pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
 214
 215 unsigned long pte_sz_bits(unsigned long size);
 216
 217 extern pgprot_t PAGE_KERNEL;
 218 extern pgprot_t PAGE_KERNEL_LOCKED;
 219 extern pgprot_t PAGE_COPY;
 220 extern pgprot_t PAGE_SHARED;
 221
 222 /* XXX This ugliness is for the atyfb driver's sparc mmap() support. XXX */
 223 extern unsigned long _PAGE_IE;
 224 extern unsigned long _PAGE_E;
 225 extern unsigned long _PAGE_CACHE;
 226
 227 extern unsigned long pg_iobits;
 228 extern unsigned long _PAGE_ALL_SZ_BITS;
 229
 230 extern struct page *mem_map_zero;
 231 #define ZERO_PAGE(vaddr)        (mem_map_zero)
 232
 233 /* PFNs are real physical page numbers.  However, mem_map only begins to record
 234  * per-page information starting at pfn_base.  This is to handle systems where
 235  * the first physical page in the machine is at some huge physical address,
 236  * such as 4GB.   This is common on a partitioned E10000, for example.
 237  */
 238 static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
 239 {
 240         unsigned long paddr = pfn << PAGE_SHIFT;
 241
 242         BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
 243         return __pte(paddr | pgprot_val(prot));
 244 }
 245 #define mk_pte(page, pgprot)    pfn_pte(page_to_pfn(page), (pgprot))
 246
 247 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 248 static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
 249 {
 250         pte_t pte = pfn_pte(page_nr, pgprot);
 251
 252         return __pmd(pte_val(pte));
 253 }
 254 #define mk_pmd(page, pgprot)    pfn_pmd(page_to_pfn(page), (pgprot))
 255 #endif
 256
 257 /* This one can be done with two shifts.  */
 258 static inline unsigned long pte_pfn(pte_t pte)
 259 {
 260         unsigned long ret;
 261
 262         __asm__ __volatile__(
 263         "\n661: sllx            %1, %2, %0\n"
 264         "       srlx            %0, %3, %0\n"
 265         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 266         "       .word           661b\n"
 267         "       sllx            %1, %4, %0\n"
 268         "       srlx            %0, %5, %0\n"
 269         "       .previous\n"
 270         : "=r" (ret)
 271         : "r" (pte_val(pte)),
 272           "i" (21), "i" (21 + PAGE_SHIFT),
 273           "i" (8), "i" (8 + PAGE_SHIFT));
 274
 275         return ret;
 276 }
 277 #define pte_page(x) pfn_to_page(pte_pfn(x))
 278
 279 static inline pte_t pte_modify(pte_t pte, pgprot_t prot)
 280 {
 281         unsigned long mask, tmp;
 282
 283         /* SUN4U: 0x630107ffffffec38 (negated == 0x9cfef800000013c7)
 284          * SUN4V: 0x33ffffffffffee07 (negated == 0xcc000000000011f8)
 285          *
 286          * Even if we use negation tricks the result is still a 6
 287          * instruction sequence, so don't try to play fancy and just
 288          * do the most straightforward implementation.
 289          *
 290          * Note: We encode this into 3 sun4v 2-insn patch sequences.
 291          */
 292
 293         BUILD_BUG_ON(_PAGE_SZBITS_4U != 0UL || _PAGE_SZBITS_4V != 0UL);
 294         __asm__ __volatile__(
 295         "\n661: sethi           %%uhi(%2), %1\n"
 296         "       sethi           %%hi(%2), %0\n"
 297         "\n662: or              %1, %%ulo(%2), %1\n"
 298         "       or              %0, %%lo(%2), %0\n"
 299         "\n663: sllx            %1, 32, %1\n"
 300         "       or              %0, %1, %0\n"
 301         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 302         "       .word           661b\n"
 303         "       sethi           %%uhi(%3), %1\n"
 304         "       sethi           %%hi(%3), %0\n"
 305         "       .word           662b\n"
 306         "       or              %1, %%ulo(%3), %1\n"
 307         "       or              %0, %%lo(%3), %0\n"
 308         "       .word           663b\n"
 309         "       sllx            %1, 32, %1\n"
 310         "       or              %0, %1, %0\n"
 311         "       .previous\n"
 312         "       .section        .sun_m7_2insn_patch, \"ax\"\n"
 313         "       .word           661b\n"
 314         "       sethi           %%uhi(%4), %1\n"
 315         "       sethi           %%hi(%4), %0\n"
 316         "       .word           662b\n"
 317         "       or              %1, %%ulo(%4), %1\n"
 318         "       or              %0, %%lo(%4), %0\n"
 319         "       .word           663b\n"
 320         "       sllx            %1, 32, %1\n"
 321         "       or              %0, %1, %0\n"
 322         "       .previous\n"
 323         : "=r" (mask), "=r" (tmp)
 324         : "i" (_PAGE_PADDR_4U | _PAGE_MODIFIED_4U | _PAGE_ACCESSED_4U |
 325                _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_E_4U |
 326                _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4U),
 327           "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
 328                _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_E_4V |
 329                _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V),
 330           "i" (_PAGE_PADDR_4V | _PAGE_MODIFIED_4V | _PAGE_ACCESSED_4V |
 331                _PAGE_CP_4V | _PAGE_E_4V |
 332                _PAGE_SPECIAL | _PAGE_PMD_HUGE | _PAGE_SZALL_4V));
 333
 334         return __pte((pte_val(pte) & mask) | (pgprot_val(prot) & ~mask));
 335 }
 336
 337 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 338 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
 339 {
 340         pte_t pte = __pte(pmd_val(pmd));
 341
 342         pte = pte_modify(pte, newprot);
 343
 344         return __pmd(pte_val(pte));
 345 }
 346 #endif
 347
 348 static inline pgprot_t pgprot_noncached(pgprot_t prot)
 349 {
 350         unsigned long val = pgprot_val(prot);
 351
 352         __asm__ __volatile__(
 353         "\n661: andn            %0, %2, %0\n"
 354         "       or              %0, %3, %0\n"
 355         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 356         "       .word           661b\n"
 357         "       andn            %0, %4, %0\n"
 358         "       or              %0, %5, %0\n"
 359         "       .previous\n"
 360         "       .section        .sun_m7_2insn_patch, \"ax\"\n"
 361         "       .word           661b\n"
 362         "       andn            %0, %6, %0\n"
 363         "       or              %0, %5, %0\n"
 364         "       .previous\n"
 365         : "=r" (val)
 366         : "0" (val), "i" (_PAGE_CP_4U | _PAGE_CV_4U), "i" (_PAGE_E_4U),
 367                      "i" (_PAGE_CP_4V | _PAGE_CV_4V), "i" (_PAGE_E_4V),
 368                      "i" (_PAGE_CP_4V));
 369
 370         return __pgprot(val);
 371 }
 372 /* Various pieces of code check for platform support by ifdef testing
 373  * on "pgprot_noncached".  That's broken and should be fixed, but for
 374  * now...
 375  */
 376 #define pgprot_noncached pgprot_noncached
 377
 378 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
 379 extern pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
 380                                 struct page *page, int writable);
 381 #define arch_make_huge_pte arch_make_huge_pte
 382 static inline unsigned long __pte_default_huge_mask(void)
 383 {
 384         unsigned long mask;
 385
 386         __asm__ __volatile__(
 387         "\n661: sethi           %%uhi(%1), %0\n"
 388         "       sllx            %0, 32, %0\n"
 389         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 390         "       .word           661b\n"
 391         "       mov             %2, %0\n"
 392         "       nop\n"
 393         "       .previous\n"
 394         : "=r" (mask)
 395         : "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
 396
 397         return mask;
 398 }
 399
 400 static inline pte_t pte_mkhuge(pte_t pte)
 401 {
 402         return __pte(pte_val(pte) | __pte_default_huge_mask());
 403 }
 404
 405 static inline bool is_default_hugetlb_pte(pte_t pte)
 406 {
 407         unsigned long mask = __pte_default_huge_mask();
 408
 409         return (pte_val(pte) & mask) == mask;
 410 }
 411
 412 static inline bool is_hugetlb_pmd(pmd_t pmd)
 413 {
 414         return !!(pmd_val(pmd) & _PAGE_PMD_HUGE);
 415 }
 416
 417 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 418 static inline pmd_t pmd_mkhuge(pmd_t pmd)
 419 {
 420         pte_t pte = __pte(pmd_val(pmd));
 421
 422         pte = pte_mkhuge(pte);
 423         pte_val(pte) |= _PAGE_PMD_HUGE;
 424
 425         return __pmd(pte_val(pte));
 426 }
 427 #endif
 428 #else
 429 static inline bool is_hugetlb_pte(pte_t pte)
 430 {
 431         return false;
 432 }
 433 #endif
 434
 435 static inline pte_t pte_mkdirty(pte_t pte)
 436 {
 437         unsigned long val = pte_val(pte), tmp;
 438
 439         __asm__ __volatile__(
 440         "\n661: or              %0, %3, %0\n"
 441         "       nop\n"
 442         "\n662: nop\n"
 443         "       nop\n"
 444         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 445         "       .word           661b\n"
 446         "       sethi           %%uhi(%4), %1\n"
 447         "       sllx            %1, 32, %1\n"
 448         "       .word           662b\n"
 449         "       or              %1, %%lo(%4), %1\n"
 450         "       or              %0, %1, %0\n"
 451         "       .previous\n"
 452         : "=r" (val), "=r" (tmp)
 453         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 454           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 455
 456         return __pte(val);
 457 }
 458
 459 static inline pte_t pte_mkclean(pte_t pte)
 460 {
 461         unsigned long val = pte_val(pte), tmp;
 462
 463         __asm__ __volatile__(
 464         "\n661: andn            %0, %3, %0\n"
 465         "       nop\n"
 466         "\n662: nop\n"
 467         "       nop\n"
 468         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 469         "       .word           661b\n"
 470         "       sethi           %%uhi(%4), %1\n"
 471         "       sllx            %1, 32, %1\n"
 472         "       .word           662b\n"
 473         "       or              %1, %%lo(%4), %1\n"
 474         "       andn            %0, %1, %0\n"
 475         "       .previous\n"
 476         : "=r" (val), "=r" (tmp)
 477         : "0" (val), "i" (_PAGE_MODIFIED_4U | _PAGE_W_4U),
 478           "i" (_PAGE_MODIFIED_4V | _PAGE_W_4V));
 479
 480         return __pte(val);
 481 }
 482
 483 static inline pte_t pte_mkwrite(pte_t pte)
 484 {
 485         unsigned long val = pte_val(pte), 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_WRITE_4U), "i" (_PAGE_WRITE_4V));
 497
 498         return __pte(val | mask);
 499 }
 500
 501 static inline pte_t pte_wrprotect(pte_t pte)
 502 {
 503         unsigned long val = pte_val(pte), tmp;
 504
 505         __asm__ __volatile__(
 506         "\n661: andn            %0, %3, %0\n"
 507         "       nop\n"
 508         "\n662: nop\n"
 509         "       nop\n"
 510         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 511         "       .word           661b\n"
 512         "       sethi           %%uhi(%4), %1\n"
 513         "       sllx            %1, 32, %1\n"
 514         "       .word           662b\n"
 515         "       or              %1, %%lo(%4), %1\n"
 516         "       andn            %0, %1, %0\n"
 517         "       .previous\n"
 518         : "=r" (val), "=r" (tmp)
 519         : "0" (val), "i" (_PAGE_WRITE_4U | _PAGE_W_4U),
 520           "i" (_PAGE_WRITE_4V | _PAGE_W_4V));
 521
 522         return __pte(val);
 523 }
 524
 525 static inline pte_t pte_mkold(pte_t pte)
 526 {
 527         unsigned long mask;
 528
 529         __asm__ __volatile__(
 530         "\n661: mov             %1, %0\n"
 531         "       nop\n"
 532         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 533         "       .word           661b\n"
 534         "       sethi           %%uhi(%2), %0\n"
 535         "       sllx            %0, 32, %0\n"
 536         "       .previous\n"
 537         : "=r" (mask)
 538         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 539
 540         mask |= _PAGE_R;
 541
 542         return __pte(pte_val(pte) & ~mask);
 543 }
 544
 545 static inline pte_t pte_mkyoung(pte_t pte)
 546 {
 547         unsigned long mask;
 548
 549         __asm__ __volatile__(
 550         "\n661: mov             %1, %0\n"
 551         "       nop\n"
 552         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 553         "       .word           661b\n"
 554         "       sethi           %%uhi(%2), %0\n"
 555         "       sllx            %0, 32, %0\n"
 556         "       .previous\n"
 557         : "=r" (mask)
 558         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 559
 560         mask |= _PAGE_R;
 561
 562         return __pte(pte_val(pte) | mask);
 563 }
 564
 565 static inline pte_t pte_mkspecial(pte_t pte)
 566 {
 567         pte_val(pte) |= _PAGE_SPECIAL;
 568         return pte;
 569 }
 570
 571 static inline unsigned long pte_young(pte_t pte)
 572 {
 573         unsigned long mask;
 574
 575         __asm__ __volatile__(
 576         "\n661: mov             %1, %0\n"
 577         "       nop\n"
 578         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 579         "       .word           661b\n"
 580         "       sethi           %%uhi(%2), %0\n"
 581         "       sllx            %0, 32, %0\n"
 582         "       .previous\n"
 583         : "=r" (mask)
 584         : "i" (_PAGE_ACCESSED_4U), "i" (_PAGE_ACCESSED_4V));
 585
 586         return (pte_val(pte) & mask);
 587 }
 588
 589 static inline unsigned long pte_dirty(pte_t pte)
 590 {
 591         unsigned long mask;
 592
 593         __asm__ __volatile__(
 594         "\n661: mov             %1, %0\n"
 595         "       nop\n"
 596         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 597         "       .word           661b\n"
 598         "       sethi           %%uhi(%2), %0\n"
 599         "       sllx            %0, 32, %0\n"
 600         "       .previous\n"
 601         : "=r" (mask)
 602         : "i" (_PAGE_MODIFIED_4U), "i" (_PAGE_MODIFIED_4V));
 603
 604         return (pte_val(pte) & mask);
 605 }
 606
 607 static inline unsigned long pte_write(pte_t pte)
 608 {
 609         unsigned long mask;
 610
 611         __asm__ __volatile__(
 612         "\n661: mov             %1, %0\n"
 613         "       nop\n"
 614         "       .section        .sun4v_2insn_patch, \"ax\"\n"
 615         "       .word           661b\n"
 616         "       sethi           %%uhi(%2), %0\n"
 617         "       sllx            %0, 32, %0\n"
 618         "       .previous\n"
 619         : "=r" (mask)
 620         : "i" (_PAGE_WRITE_4U), "i" (_PAGE_WRITE_4V));
 621
 622         return (pte_val(pte) & mask);
 623 }
 624
 625 static inline unsigned long pte_exec(pte_t pte)
 626 {
 627         unsigned long mask;
 628
 629         __asm__ __volatile__(
 630         "\n661: sethi           %%hi(%1), %0\n"
 631         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 632         "       .word           661b\n"
 633         "       mov             %2, %0\n"
 634         "       .previous\n"
 635         : "=r" (mask)
 636         : "i" (_PAGE_EXEC_4U), "i" (_PAGE_EXEC_4V));
 637
 638         return (pte_val(pte) & mask);
 639 }
 640
 641 static inline unsigned long pte_present(pte_t pte)
 642 {
 643         unsigned long val = pte_val(pte);
 644
 645         __asm__ __volatile__(
 646         "\n661: and             %0, %2, %0\n"
 647         "       .section        .sun4v_1insn_patch, \"ax\"\n"
 648         "       .word           661b\n"
 649         "       and             %0, %3, %0\n"
 650         "       .previous\n"
 651         : "=r" (val)
 652         : "0" (val), "i" (_PAGE_PRESENT_4U), "i" (_PAGE_PRESENT_4V));
 653
 654         return val;
 655 }
 656
 657 #define pte_accessible pte_accessible
 658 static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a)
 659 {
 660         return pte_val(a) & _PAGE_VALID;
 661 }
 662
 663 static inline unsigned long pte_special(pte_t pte)
 664 {
 665         return pte_val(pte) & _PAGE_SPECIAL;
 666 }
 667
 668 static inline unsigned long pmd_large(pmd_t pmd)
 669 {
 670         pte_t pte = __pte(pmd_val(pmd));
 671
 672         return pte_val(pte) & _PAGE_PMD_HUGE;
 673 }
 674
 675 static inline unsigned long pmd_pfn(pmd_t pmd)
 676 {
 677         pte_t pte = __pte(pmd_val(pmd));
 678
 679         return pte_pfn(pte);
 680 }
 681
 682 #define __HAVE_ARCH_PMD_WRITE
 683 static inline unsigned long pmd_write(pmd_t pmd)
 684 {
 685         pte_t pte = __pte(pmd_val(pmd));
 686
 687         return pte_write(pte);
 688 }
 689
 690 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 691 static inline unsigned long pmd_dirty(pmd_t pmd)
 692 {
 693         pte_t pte = __pte(pmd_val(pmd));
 694
 695         return pte_dirty(pte);
 696 }
 697
 698 static inline unsigned long pmd_young(pmd_t pmd)
 699 {
 700         pte_t pte = __pte(pmd_val(pmd));
 701
 702         return pte_young(pte);
 703 }
 704
 705 static inline unsigned long pmd_trans_huge(pmd_t pmd)
 706 {
 707         pte_t pte = __pte(pmd_val(pmd));
 708
 709         return pte_val(pte) & _PAGE_PMD_HUGE;
 710 }
 711
 712 static inline pmd_t pmd_mkold(pmd_t pmd)
 713 {
 714         pte_t pte = __pte(pmd_val(pmd));
 715
 716         pte = pte_mkold(pte);
 717
 718         return __pmd(pte_val(pte));
 719 }
 720
 721 static inline pmd_t pmd_wrprotect(pmd_t pmd)
 722 {
 723         pte_t pte = __pte(pmd_val(pmd));
 724
 725         pte = pte_wrprotect(pte);
 726
 727         return __pmd(pte_val(pte));
 728 }
 729
 730 static inline pmd_t pmd_mkdirty(pmd_t pmd)
 731 {
 732         pte_t pte = __pte(pmd_val(pmd));
 733
 734         pte = pte_mkdirty(pte);
 735
 736         return __pmd(pte_val(pte));
 737 }
 738
 739 static inline pmd_t pmd_mkclean(pmd_t pmd)
 740 {
 741         pte_t pte = __pte(pmd_val(pmd));
 742
 743         pte = pte_mkclean(pte);
 744
 745         return __pmd(pte_val(pte));
 746 }
 747
 748 static inline pmd_t pmd_mkyoung(pmd_t pmd)
 749 {
 750         pte_t pte = __pte(pmd_val(pmd));
 751
 752         pte = pte_mkyoung(pte);
 753
 754         return __pmd(pte_val(pte));
 755 }
 756
 757 static inline pmd_t pmd_mkwrite(pmd_t pmd)
 758 {
 759         pte_t pte = __pte(pmd_val(pmd));
 760
 761         pte = pte_mkwrite(pte);
 762
 763         return __pmd(pte_val(pte));
 764 }
 765
 766 static inline pgprot_t pmd_pgprot(pmd_t entry)
 767 {
 768         unsigned long val = pmd_val(entry);
 769
 770         return __pgprot(val);
 771 }
 772 #endif
 773
 774 static inline int pmd_present(pmd_t pmd)
 775 {
 776         return pmd_val(pmd) != 0UL;
 777 }
 778
 779 #define pmd_none(pmd)                   (!pmd_val(pmd))
 780
 781 /* pmd_bad() is only called on non-trans-huge PMDs.  Our encoding is
 782  * very simple, it's just the physical address.  PTE tables are of
 783  * size PAGE_SIZE so make sure the sub-PAGE_SIZE bits are clear and
 784  * the top bits outside of the range of any physical address size we
 785  * support are clear as well.  We also validate the physical itself.
 786  */
 787 #define pmd_bad(pmd)                    (pmd_val(pmd) & ~PAGE_MASK)
 788
 789 #define pud_none(pud)                   (!pud_val(pud))
 790
 791 #define pud_bad(pud)                    (pud_val(pud) & ~PAGE_MASK)
 792
 793 #define pgd_none(pgd)                   (!pgd_val(pgd))
 794
 795 #define pgd_bad(pgd)                    (pgd_val(pgd) & ~PAGE_MASK)
 796
 797 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 798 void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 799                 pmd_t *pmdp, pmd_t pmd);
 800 #else
 801 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 802                               pmd_t *pmdp, pmd_t pmd)
 803 {
 804         *pmdp = pmd;
 805 }
 806 #endif
 807
 808 static inline void pmd_set(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
 809 {
 810         unsigned long val = __pa((unsigned long) (ptep));
 811
 812         pmd_val(*pmdp) = val;
 813 }
 814
 815 #define pud_set(pudp, pmdp)     \
 816         (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp))))
 817 static inline unsigned long __pmd_page(pmd_t pmd)
 818 {
 819         pte_t pte = __pte(pmd_val(pmd));
 820         unsigned long pfn;
 821
 822         pfn = pte_pfn(pte);
 823
 824         return ((unsigned long) __va(pfn << PAGE_SHIFT));
 825 }
 826 #define pmd_page(pmd)                   virt_to_page((void *)__pmd_page(pmd))
 827 #define pud_page_vaddr(pud)             \
 828         ((unsigned long) __va(pud_val(pud)))
 829 #define pud_page(pud)                   virt_to_page((void *)pud_page_vaddr(pud))
 830 #define pmd_clear(pmdp)                 (pmd_val(*(pmdp)) = 0UL)
 831 #define pud_present(pud)                (pud_val(pud) != 0U)
 832 #define pud_clear(pudp)                 (pud_val(*(pudp)) = 0UL)
 833 #define pgd_page_vaddr(pgd)             \
 834         ((unsigned long) __va(pgd_val(pgd)))
 835 #define pgd_present(pgd)                (pgd_val(pgd) != 0U)
 836 #define pgd_clear(pgdp)                 (pgd_val(*(pgdp)) = 0UL)
 837
 838 static inline unsigned long pud_large(pud_t pud)
 839 {
 840         pte_t pte = __pte(pud_val(pud));
 841
 842         return pte_val(pte) & _PAGE_PMD_HUGE;
 843 }
 844
 845 static inline unsigned long pud_pfn(pud_t pud)
 846 {
 847         pte_t pte = __pte(pud_val(pud));
 848
 849         return pte_pfn(pte);
 850 }
 851
 852 /* Same in both SUN4V and SUN4U.  */
 853 #define pte_none(pte)                   (!pte_val(pte))
 854
 855 #define pgd_set(pgdp, pudp)     \
 856         (pgd_val(*(pgdp)) = (__pa((unsigned long) (pudp))))
 857
 858 /* to find an entry in a page-table-directory. */
 859 #define pgd_index(address)      (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
 860 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
 861
 862 /* to find an entry in a kernel page-table-directory */
 863 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
 864
 865 /* Find an entry in the third-level page table.. */
 866 #define pud_index(address)      (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
 867 #define pud_offset(pgdp, address)       \
 868         ((pud_t *) pgd_page_vaddr(*(pgdp)) + pud_index(address))
 869
 870 /* Find an entry in the second-level page table.. */
 871 #define pmd_offset(pudp, address)       \
 872         ((pmd_t *) pud_page_vaddr(*(pudp)) + \
 873          (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
 874
 875 /* Find an entry in the third-level page table.. */
 876 #define pte_index(dir, address) \
 877         ((pte_t *) __pmd_page(*(dir)) + \
 878          ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
 879 #define pte_offset_kernel               pte_index
 880 #define pte_offset_map                  pte_index
 881 #define pte_unmap(pte)                  do { } while (0)
 882
 883 /* We cannot include <linux/mm_types.h> at this point yet: */
 884 extern struct mm_struct init_mm;
 885
 886 /* Actual page table PTE updates.  */
 887 void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
 888                    pte_t *ptep, pte_t orig, int fullmm,
 889                    unsigned int hugepage_shift);
 890
 891 static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
 892                                 pte_t *ptep, pte_t orig, int fullmm,
 893                                 unsigned int hugepage_shift)
 894 {
 895         /* It is more efficient to let flush_tlb_kernel_range()
 896          * handle init_mm tlb flushes.
 897          *
 898          * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
 899          *             and SUN4V pte layout, so this inline test is fine.
 900          */
 901         if (likely(mm != &init_mm) && pte_accessible(mm, orig))
 902                 tlb_batch_add(mm, vaddr, ptep, orig, fullmm, hugepage_shift);
 903 }
 904
 905 #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
 906 static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
 907                                             unsigned long addr,
 908                                             pmd_t *pmdp)
 909 {
 910         pmd_t pmd = *pmdp;
 911         set_pmd_at(mm, addr, pmdp, __pmd(0UL));
 912         return pmd;
 913 }
 914
 915 static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
 916                              pte_t *ptep, pte_t pte, int fullmm)
 917 {
 918         pte_t orig = *ptep;
 919
 920         *ptep = pte;
 921         maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm, PAGE_SHIFT);
 922 }
 923
 924 #define set_pte_at(mm,addr,ptep,pte)    \
 925         __set_pte_at((mm), (addr), (ptep), (pte), 0)
 926
 927 #define pte_clear(mm,addr,ptep)         \
 928         set_pte_at((mm), (addr), (ptep), __pte(0UL))
 929
 930 #define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
 931 #define pte_clear_not_present_full(mm,addr,ptep,fullmm) \
 932         __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
 933
 934 #ifdef DCACHE_ALIASING_POSSIBLE
 935 #define __HAVE_ARCH_MOVE_PTE
 936 #define move_pte(pte, prot, old_addr, new_addr)                         \
 937 ({                                                                      \
 938         pte_t newpte = (pte);                                           \
 939         if (tlb_type != hypervisor && pte_present(pte)) {               \
 940                 unsigned long this_pfn = pte_pfn(pte);                  \
 941                                                                         \
 942                 if (pfn_valid(this_pfn) &&                              \
 943                     (((old_addr) ^ (new_addr)) & (1 << 13)))            \
 944                         flush_dcache_page_all(current->mm,              \
 945                                               pfn_to_page(this_pfn));   \
 946         }                                                               \
 947         newpte;                                                         \
 948 })
 949 #endif
 950
 951 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 952
 953 void paging_init(void);
 954 unsigned long find_ecache_flush_span(unsigned long size);
 955
 956 struct seq_file;
 957 void mmu_info(struct seq_file *);
 958
 959 struct vm_area_struct;
 960 void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
 961 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 962 void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
 963                           pmd_t *pmd);
 964
 965 #define __HAVE_ARCH_PMDP_INVALIDATE
 966 extern void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
 967                             pmd_t *pmdp);
 968
 969 #define __HAVE_ARCH_PGTABLE_DEPOSIT
 970 void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
 971                                 pgtable_t pgtable);
 972
 973 #define __HAVE_ARCH_PGTABLE_WITHDRAW
 974 pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
 975 #endif
 976
 977 /* Encode and de-code a swap entry */
 978 #define __swp_type(entry)       (((entry).val >> PAGE_SHIFT) & 0xffUL)
 979 #define __swp_offset(entry)     ((entry).val >> (PAGE_SHIFT + 8UL))
 980 #define __swp_entry(type, offset)       \
 981         ( (swp_entry_t) \
 982           { \
 983                 (((long)(type) << PAGE_SHIFT) | \
 984                  ((long)(offset) << (PAGE_SHIFT + 8UL))) \
 985           } )
 986 #define __pte_to_swp_entry(pte)         ((swp_entry_t) { pte_val(pte) })
 987 #define __swp_entry_to_pte(x)           ((pte_t) { (x).val })
 988
 989 int page_in_phys_avail(unsigned long paddr);
 990
 991 /*
 992  * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
 993  * its high 4 bits.  These macros/functions put it there or get it from there.
 994  */
 995 #define MK_IOSPACE_PFN(space, pfn)      (pfn | (space << (BITS_PER_LONG - 4)))
 996 #define GET_IOSPACE(pfn)                (pfn >> (BITS_PER_LONG - 4))
 997 #define GET_PFN(pfn)                    (pfn & 0x0fffffffffffffffUL)
 998
 999 int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
1000                     unsigned long, pgprot_t);
1001
1002 static inline int io_remap_pfn_range(struct vm_area_struct *vma,
1003                                      unsigned long from, unsigned long pfn,
1004                                      unsigned long size, pgprot_t prot)
1005 {
1006         unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
1007         int space = GET_IOSPACE(pfn);
1008         unsigned long phys_base;
1009
1010         phys_base = offset | (((unsigned long) space) << 32UL);
1011
1012         return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
1013 }
1014 #define io_remap_pfn_range io_remap_pfn_range
1015
1016 #include <asm/tlbflush.h>
1017 #include <asm-generic/pgtable.h>
1018
1019 /* We provide our own get_unmapped_area to cope with VA holes and
1020  * SHM area cache aliasing for userland.
1021  */
1022 #define HAVE_ARCH_UNMAPPED_AREA
1023 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1024
1025 /* We provide a special get_unmapped_area for framebuffer mmaps to try and use
1026  * the largest alignment possible such that larget PTEs can be used.
1027  */
1028 unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
1029                                    unsigned long, unsigned long,
1030                                    unsigned long);
1031 #define HAVE_ARCH_FB_UNMAPPED_AREA
1032
1033 void pgtable_cache_init(void);
1034 void sun4v_register_fault_status(void);
1035 void sun4v_ktsb_register(void);
1036 void __init cheetah_ecache_flush_init(void);
1037 void sun4v_patch_tlb_handlers(void);
1038
1039 extern unsigned long cmdline_memory_size;
1040
1041 asmlinkage void do_sparc64_fault(struct pt_regs *regs);
1042
1043 #endif /* !(__ASSEMBLY__) */
1044
1045 #endif /* !(_SPARC64_PGTABLE_H) */