LXR linux/arch/sparc/include/asm/pgtable

   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
 206extern pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long);
 207
 208extern unsigned long pte_sz_bits(unsigned long size);
 209
 210extern pgprot_t PAGE_KERNEL;
 211extern pgprot_t PAGE_KERNEL_LOCKED;
 212extern pgprot_t PAGE_COPY;
 213extern pgprot_t PAGE_SHARED;
 214
 215/* XXX This uglyness is for the atyfb driver's sparc mmap() support. XXX */
 216extern unsigned long _PAGE_IE;
 217extern unsigned long _PAGE_E;
 218extern unsigned long _PAGE_CACHE;
 219
 220extern unsigned long pg_iobits;
 221extern unsigned long _PAGE_ALL_SZ_BITS;
 222extern unsigned long _PAGE_SZBITS;
 223
 224extern 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 */
 232static 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.  */
 255static 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
 276static 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
 319static 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
 335static 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
 360static 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
 379static 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
 403static 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
 427static 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
 445static 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
 469static 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
 489static 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
 509static inline pte_t pte_mkspecial(pte_t pte)
 510{
 511        pte_val(pte) |= _PAGE_SPECIAL;
 512        return pte;
 513}
 514
 515static 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
 533static 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
 551static 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
 569static 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
 585static 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
 601static 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
 617static 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.  */
 665extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
 666                          pte_t *ptep, pte_t orig, int fullmm);
 667
 668static 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
 712extern pgd_t swapper_pg_dir[2048];
 713extern pmd_t swapper_low_pmd_dir[2048];
 714
 715extern void paging_init(void);
 716extern unsigned long find_ecache_flush_span(unsigned long size);
 717
 718struct seq_file;
 719extern 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
 725struct vm_area_struct;
 726extern 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. */
 741extern unsigned long pte_file(pte_t);
 742#define pte_to_pgoff(pte)       (pte_val(pte) >> PAGE_SHIFT)
 743extern pte_t pgoff_to_pte(unsigned long);
 744#define PTE_FILE_MAX_BITS       (64UL - PAGE_SHIFT - 1UL)
 745
 746extern unsigned long sparc64_valid_addr_bitmap[];
 747
 748/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 749static 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
 758extern int page_in_phys_avail(unsigned long paddr);
 759
 760extern 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 */
 783extern 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
 788extern void pgtable_cache_init(void);
 789extern void sun4v_register_fault_status(void);
 790extern void sun4v_ktsb_register(void);
 791extern void __init cheetah_ecache_flush_init(void);
 792extern void sun4v_patch_tlb_handlers(void);
 793
 794extern unsigned long cmdline_memory_size;
 795
 796extern asmlinkage void do_sparc64_fault(struct pt_regs *regs);
 797
 798#endif /* !(__ASSEMBLY__) */
 799
 800#endif /* !(_SPARC64_PGTABLE_H) */
 801