arch/arm/include/asm/tlbflush.h

   1 /*
   2  *  arch/arm/include/asm/tlbflush.h
   3  *
   4  *  Copyright (C) 1999-2003 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef _ASMARM_TLBFLUSH_H
  11 #define _ASMARM_TLBFLUSH_H
  12
  13 #ifdef CONFIG_MMU
  14
  15 #include <asm/glue.h>
  16
  17 #define TLB_V3_PAGE     (1 << 0)
  18 #define TLB_V4_U_PAGE   (1 << 1)
  19 #define TLB_V4_D_PAGE   (1 << 2)
  20 #define TLB_V4_I_PAGE   (1 << 3)
  21 #define TLB_V6_U_PAGE   (1 << 4)
  22 #define TLB_V6_D_PAGE   (1 << 5)
  23 #define TLB_V6_I_PAGE   (1 << 6)
  24
  25 #define TLB_V3_FULL     (1 << 8)
  26 #define TLB_V4_U_FULL   (1 << 9)
  27 #define TLB_V4_D_FULL   (1 << 10)
  28 #define TLB_V4_I_FULL   (1 << 11)
  29 #define TLB_V6_U_FULL   (1 << 12)
  30 #define TLB_V6_D_FULL   (1 << 13)
  31 #define TLB_V6_I_FULL   (1 << 14)
  32
  33 #define TLB_V6_U_ASID   (1 << 16)
  34 #define TLB_V6_D_ASID   (1 << 17)
  35 #define TLB_V6_I_ASID   (1 << 18)
  36
  37 #define TLB_BTB         (1 << 28)
  38
  39 /* Unified Inner Shareable TLB operations (ARMv7 MP extensions) */
  40 #define TLB_V7_UIS_PAGE (1 << 19)
  41 #define TLB_V7_UIS_FULL (1 << 20)
  42 #define TLB_V7_UIS_ASID (1 << 21)
  43
  44 /* Inner Shareable BTB operation (ARMv7 MP extensions) */
  45 #define TLB_V7_IS_BTB   (1 << 22)
  46
  47 #define TLB_L2CLEAN_FR  (1 << 29)               /* Feroceon */
  48 #define TLB_DCLEAN      (1 << 30)
  49 #define TLB_WB          (1 << 31)
  50
  51 /*
  52  *      MMU TLB Model
  53  *      =============
  54  *
  55  *      We have the following to choose from:
  56  *        v3    - ARMv3
  57  *        v4    - ARMv4 without write buffer
  58  *        v4wb  - ARMv4 with write buffer without I TLB flush entry instruction
  59  *        v4wbi - ARMv4 with write buffer with I TLB flush entry instruction
  60  *        fr    - Feroceon (v4wbi with non-outer-cacheable page table walks)
  61  *        fa    - Faraday (v4 with write buffer with UTLB and branch target buffer (BTB))
  62  *        v6wbi - ARMv6 with write buffer with I TLB flush entry instruction
  63  *        v7wbi - identical to v6wbi
  64  */
  65 #undef _TLB
  66 #undef MULTI_TLB
  67
  68 #ifdef CONFIG_SMP_ON_UP
  69 #define MULTI_TLB 1
  70 #endif
  71
  72 #define v3_tlb_flags    (TLB_V3_FULL | TLB_V3_PAGE)
  73
  74 #ifdef CONFIG_CPU_TLB_V3
  75 # define v3_possible_flags      v3_tlb_flags
  76 # define v3_always_flags        v3_tlb_flags
  77 # ifdef _TLB
  78 #  define MULTI_TLB 1
  79 # else
  80 #  define _TLB v3
  81 # endif
  82 #else
  83 # define v3_possible_flags      0
  84 # define v3_always_flags        (-1UL)
  85 #endif
  86
  87 #define v4_tlb_flags    (TLB_V4_U_FULL | TLB_V4_U_PAGE)
  88
  89 #ifdef CONFIG_CPU_TLB_V4WT
  90 # define v4_possible_flags      v4_tlb_flags
  91 # define v4_always_flags        v4_tlb_flags
  92 # ifdef _TLB
  93 #  define MULTI_TLB 1
  94 # else
  95 #  define _TLB v4
  96 # endif
  97 #else
  98 # define v4_possible_flags      0
  99 # define v4_always_flags        (-1UL)
 100 #endif
 101
 102 #define fa_tlb_flags    (TLB_WB | TLB_BTB | TLB_DCLEAN | \
 103                          TLB_V4_U_FULL | TLB_V4_U_PAGE)
 104
 105 #ifdef CONFIG_CPU_TLB_FA
 106 # define fa_possible_flags      fa_tlb_flags
 107 # define fa_always_flags        fa_tlb_flags
 108 # ifdef _TLB
 109 #  define MULTI_TLB 1
 110 # else
 111 #  define _TLB fa
 112 # endif
 113 #else
 114 # define fa_possible_flags      0
 115 # define fa_always_flags        (-1UL)
 116 #endif
 117
 118 #define v4wbi_tlb_flags (TLB_WB | TLB_DCLEAN | \
 119                          TLB_V4_I_FULL | TLB_V4_D_FULL | \
 120                          TLB_V4_I_PAGE | TLB_V4_D_PAGE)
 121
 122 #ifdef CONFIG_CPU_TLB_V4WBI
 123 # define v4wbi_possible_flags   v4wbi_tlb_flags
 124 # define v4wbi_always_flags     v4wbi_tlb_flags
 125 # ifdef _TLB
 126 #  define MULTI_TLB 1
 127 # else
 128 #  define _TLB v4wbi
 129 # endif
 130 #else
 131 # define v4wbi_possible_flags   0
 132 # define v4wbi_always_flags     (-1UL)
 133 #endif
 134
 135 #define fr_tlb_flags    (TLB_WB | TLB_DCLEAN | TLB_L2CLEAN_FR | \
 136                          TLB_V4_I_FULL | TLB_V4_D_FULL | \
 137                          TLB_V4_I_PAGE | TLB_V4_D_PAGE)
 138
 139 #ifdef CONFIG_CPU_TLB_FEROCEON
 140 # define fr_possible_flags      fr_tlb_flags
 141 # define fr_always_flags        fr_tlb_flags
 142 # ifdef _TLB
 143 #  define MULTI_TLB 1
 144 # else
 145 #  define _TLB v4wbi
 146 # endif
 147 #else
 148 # define fr_possible_flags      0
 149 # define fr_always_flags        (-1UL)
 150 #endif
 151
 152 #define v4wb_tlb_flags  (TLB_WB | TLB_DCLEAN | \
 153                          TLB_V4_I_FULL | TLB_V4_D_FULL | \
 154                          TLB_V4_D_PAGE)
 155
 156 #ifdef CONFIG_CPU_TLB_V4WB
 157 # define v4wb_possible_flags    v4wb_tlb_flags
 158 # define v4wb_always_flags      v4wb_tlb_flags
 159 # ifdef _TLB
 160 #  define MULTI_TLB 1
 161 # else
 162 #  define _TLB v4wb
 163 # endif
 164 #else
 165 # define v4wb_possible_flags    0
 166 # define v4wb_always_flags      (-1UL)
 167 #endif
 168
 169 #define v6wbi_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_BTB | \
 170                          TLB_V6_I_FULL | TLB_V6_D_FULL | \
 171                          TLB_V6_I_PAGE | TLB_V6_D_PAGE | \
 172                          TLB_V6_I_ASID | TLB_V6_D_ASID)
 173
 174 #ifdef CONFIG_CPU_TLB_V6
 175 # define v6wbi_possible_flags   v6wbi_tlb_flags
 176 # define v6wbi_always_flags     v6wbi_tlb_flags
 177 # ifdef _TLB
 178 #  define MULTI_TLB 1
 179 # else
 180 #  define _TLB v6wbi
 181 # endif
 182 #else
 183 # define v6wbi_possible_flags   0
 184 # define v6wbi_always_flags     (-1UL)
 185 #endif
 186
 187 #define v7wbi_tlb_flags_smp     (TLB_WB | TLB_DCLEAN | TLB_V7_IS_BTB | \
 188                          TLB_V7_UIS_FULL | TLB_V7_UIS_PAGE | TLB_V7_UIS_ASID)
 189 #define v7wbi_tlb_flags_up      (TLB_WB | TLB_DCLEAN | TLB_BTB | \
 190                          TLB_V6_U_FULL | TLB_V6_U_PAGE | TLB_V6_U_ASID)
 191
 192 #ifdef CONFIG_CPU_TLB_V7
 193
 194 # ifdef CONFIG_SMP_ON_UP
 195 #  define v7wbi_possible_flags  (v7wbi_tlb_flags_smp | v7wbi_tlb_flags_up)
 196 #  define v7wbi_always_flags    (v7wbi_tlb_flags_smp & v7wbi_tlb_flags_up)
 197 # elif defined(CONFIG_SMP)
 198 #  define v7wbi_possible_flags  v7wbi_tlb_flags_smp
 199 #  define v7wbi_always_flags    v7wbi_tlb_flags_smp
 200 # else
 201 #  define v7wbi_possible_flags  v7wbi_tlb_flags_up
 202 #  define v7wbi_always_flags    v7wbi_tlb_flags_up
 203 # endif
 204 # ifdef _TLB
 205 #  define MULTI_TLB 1
 206 # else
 207 #  define _TLB v7wbi
 208 # endif
 209 #else
 210 # define v7wbi_possible_flags   0
 211 # define v7wbi_always_flags     (-1UL)
 212 #endif
 213
 214 #ifndef _TLB
 215 #error Unknown TLB model
 216 #endif
 217
 218 #ifndef __ASSEMBLY__
 219
 220 #include <linux/sched.h>
 221
 222 struct cpu_tlb_fns {
 223         void (*flush_user_range)(unsigned long, unsigned long, struct vm_area_struct *);
 224         void (*flush_kern_range)(unsigned long, unsigned long);
 225         unsigned long tlb_flags;
 226 };
 227
 228 /*
 229  * Select the calling method
 230  */
 231 #ifdef MULTI_TLB
 232
 233 #define __cpu_flush_user_tlb_range      cpu_tlb.flush_user_range
 234 #define __cpu_flush_kern_tlb_range      cpu_tlb.flush_kern_range
 235
 236 #else
 237
 238 #define __cpu_flush_user_tlb_range      __glue(_TLB,_flush_user_tlb_range)
 239 #define __cpu_flush_kern_tlb_range      __glue(_TLB,_flush_kern_tlb_range)
 240
 241 extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
 242 extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long);
 243
 244 #endif
 245
 246 extern struct cpu_tlb_fns cpu_tlb;
 247
 248 #define __cpu_tlb_flags                 cpu_tlb.tlb_flags
 249
 250 /*
 251  *      TLB Management
 252  *      ==============
 253  *
 254  *      The arch/arm/mm/tlb-*.S files implement these methods.
 255  *
 256  *      The TLB specific code is expected to perform whatever tests it
 257  *      needs to determine if it should invalidate the TLB for each
 258  *      call.  Start addresses are inclusive and end addresses are
 259  *      exclusive; it is safe to round these addresses down.
 260  *
 261  *      flush_tlb_all()
 262  *
 263  *              Invalidate the entire TLB.
 264  *
 265  *      flush_tlb_mm(mm)
 266  *
 267  *              Invalidate all TLB entries in a particular address
 268  *              space.
 269  *              - mm    - mm_struct describing address space
 270  *
 271  *      flush_tlb_range(mm,start,end)
 272  *
 273  *              Invalidate a range of TLB entries in the specified
 274  *              address space.
 275  *              - mm    - mm_struct describing address space
 276  *              - start - start address (may not be aligned)
 277  *              - end   - end address (exclusive, may not be aligned)
 278  *
 279  *      flush_tlb_page(vaddr,vma)
 280  *
 281  *              Invalidate the specified page in the specified address range.
 282  *              - vaddr - virtual address (may not be aligned)
 283  *              - vma   - vma_struct describing address range
 284  *
 285  *      flush_kern_tlb_page(kaddr)
 286  *
 287  *              Invalidate the TLB entry for the specified page.  The address
 288  *              will be in the kernels virtual memory space.  Current uses
 289  *              only require the D-TLB to be invalidated.
 290  *              - kaddr - Kernel virtual memory address
 291  */
 292
 293 /*
 294  * We optimise the code below by:
 295  *  - building a set of TLB flags that might be set in __cpu_tlb_flags
 296  *  - building a set of TLB flags that will always be set in __cpu_tlb_flags
 297  *  - if we're going to need __cpu_tlb_flags, access it once and only once
 298  *
 299  * This allows us to build optimal assembly for the single-CPU type case,
 300  * and as close to optimal given the compiler constrants for multi-CPU
 301  * case.  We could do better for the multi-CPU case if the compiler
 302  * implemented the "%?" method, but this has been discontinued due to too
 303  * many people getting it wrong.
 304  */
 305 #define possible_tlb_flags      (v3_possible_flags | \
 306                                  v4_possible_flags | \
 307                                  v4wbi_possible_flags | \
 308                                  fr_possible_flags | \
 309                                  v4wb_possible_flags | \
 310                                  fa_possible_flags | \
 311                                  v6wbi_possible_flags | \
 312                                  v7wbi_possible_flags)
 313
 314 #define always_tlb_flags        (v3_always_flags & \
 315                                  v4_always_flags & \
 316                                  v4wbi_always_flags & \
 317                                  fr_always_flags & \
 318                                  v4wb_always_flags & \
 319                                  fa_always_flags & \
 320                                  v6wbi_always_flags & \
 321                                  v7wbi_always_flags)
 322
 323 #define tlb_flag(f)     ((always_tlb_flags & (f)) || (__tlb_flag & possible_tlb_flags & (f)))
 324
 325 static inline void local_flush_tlb_all(void)
 326 {
 327         const int zero = 0;
 328         const unsigned int __tlb_flag = __cpu_tlb_flags;
 329
 330         if (tlb_flag(TLB_WB))
 331                 dsb();
 332
 333         if (tlb_flag(TLB_V3_FULL))
 334                 asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc");
 335         if (tlb_flag(TLB_V4_U_FULL | TLB_V6_U_FULL))
 336                 asm("mcr p15, 0, %0, c8, c7, 0" : : "r" (zero) : "cc");
 337         if (tlb_flag(TLB_V4_D_FULL | TLB_V6_D_FULL))
 338                 asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc");
 339         if (tlb_flag(TLB_V4_I_FULL | TLB_V6_I_FULL))
 340                 asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
 341         if (tlb_flag(TLB_V7_UIS_FULL))
 342                 asm("mcr p15, 0, %0, c8, c3, 0" : : "r" (zero) : "cc");
 343
 344         if (tlb_flag(TLB_BTB)) {
 345                 /* flush the branch target cache */
 346                 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
 347                 dsb();
 348                 isb();
 349         }
 350         if (tlb_flag(TLB_V7_IS_BTB)) {
 351                 /* flush the branch target cache */
 352                 asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero) : "cc");
 353                 dsb();
 354                 isb();
 355         }
 356 }
 357
 358 static inline void local_flush_tlb_mm(struct mm_struct *mm)
 359 {
 360         const int zero = 0;
 361         const int asid = ASID(mm);
 362         const unsigned int __tlb_flag = __cpu_tlb_flags;
 363
 364         if (tlb_flag(TLB_WB))
 365                 dsb();
 366
 367         if (cpumask_test_cpu(get_cpu(), mm_cpumask(mm))) {
 368                 if (tlb_flag(TLB_V3_FULL))
 369                         asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc");
 370                 if (tlb_flag(TLB_V4_U_FULL))
 371                         asm("mcr p15, 0, %0, c8, c7, 0" : : "r" (zero) : "cc");
 372                 if (tlb_flag(TLB_V4_D_FULL))
 373                         asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc");
 374                 if (tlb_flag(TLB_V4_I_FULL))
 375                         asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
 376         }
 377         put_cpu();
 378
 379         if (tlb_flag(TLB_V6_U_ASID))
 380                 asm("mcr p15, 0, %0, c8, c7, 2" : : "r" (asid) : "cc");
 381         if (tlb_flag(TLB_V6_D_ASID))
 382                 asm("mcr p15, 0, %0, c8, c6, 2" : : "r" (asid) : "cc");
 383         if (tlb_flag(TLB_V6_I_ASID))
 384                 asm("mcr p15, 0, %0, c8, c5, 2" : : "r" (asid) : "cc");
 385         if (tlb_flag(TLB_V7_UIS_ASID))
 386 #ifdef CONFIG_ARM_ERRATA_720789
 387                 asm("mcr p15, 0, %0, c8, c3, 0" : : "r" (zero) : "cc");
 388 #else
 389                 asm("mcr p15, 0, %0, c8, c3, 2" : : "r" (asid) : "cc");
 390 #endif
 391
 392         if (tlb_flag(TLB_BTB)) {
 393                 /* flush the branch target cache */
 394                 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
 395                 dsb();
 396         }
 397         if (tlb_flag(TLB_V7_IS_BTB)) {
 398                 /* flush the branch target cache */
 399                 asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero) : "cc");
 400                 dsb();
 401                 isb();
 402         }
 403 }
 404
 405 static inline void
 406 local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
 407 {
 408         const int zero = 0;
 409         const unsigned int __tlb_flag = __cpu_tlb_flags;
 410
 411         uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm);
 412
 413         if (tlb_flag(TLB_WB))
 414                 dsb();
 415
 416         if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
 417                 if (tlb_flag(TLB_V3_PAGE))
 418                         asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (uaddr) : "cc");
 419                 if (tlb_flag(TLB_V4_U_PAGE))
 420                         asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (uaddr) : "cc");
 421                 if (tlb_flag(TLB_V4_D_PAGE))
 422                         asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc");
 423                 if (tlb_flag(TLB_V4_I_PAGE))
 424                         asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc");
 425                 if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL))
 426                         asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
 427         }
 428
 429         if (tlb_flag(TLB_V6_U_PAGE))
 430                 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (uaddr) : "cc");
 431         if (tlb_flag(TLB_V6_D_PAGE))
 432                 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc");
 433         if (tlb_flag(TLB_V6_I_PAGE))
 434                 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc");
 435         if (tlb_flag(TLB_V7_UIS_PAGE))
 436 #ifdef CONFIG_ARM_ERRATA_720789
 437                 asm("mcr p15, 0, %0, c8, c3, 3" : : "r" (uaddr & PAGE_MASK) : "cc");
 438 #else
 439                 asm("mcr p15, 0, %0, c8, c3, 1" : : "r" (uaddr) : "cc");
 440 #endif
 441
 442         if (tlb_flag(TLB_BTB)) {
 443                 /* flush the branch target cache */
 444                 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
 445                 dsb();
 446         }
 447         if (tlb_flag(TLB_V7_IS_BTB)) {
 448                 /* flush the branch target cache */
 449                 asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero) : "cc");
 450                 dsb();
 451                 isb();
 452         }
 453 }
 454
 455 static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
 456 {
 457         const int zero = 0;
 458         const unsigned int __tlb_flag = __cpu_tlb_flags;
 459
 460         kaddr &= PAGE_MASK;
 461
 462         if (tlb_flag(TLB_WB))
 463                 dsb();
 464
 465         if (tlb_flag(TLB_V3_PAGE))
 466                 asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (kaddr) : "cc");
 467         if (tlb_flag(TLB_V4_U_PAGE))
 468                 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (kaddr) : "cc");
 469         if (tlb_flag(TLB_V4_D_PAGE))
 470                 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (kaddr) : "cc");
 471         if (tlb_flag(TLB_V4_I_PAGE))
 472                 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc");
 473         if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL))
 474                 asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
 475
 476         if (tlb_flag(TLB_V6_U_PAGE))
 477                 asm("mcr p15, 0, %0, c8, c7, 1" : : "r" (kaddr) : "cc");
 478         if (tlb_flag(TLB_V6_D_PAGE))
 479                 asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (kaddr) : "cc");
 480         if (tlb_flag(TLB_V6_I_PAGE))
 481                 asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc");
 482         if (tlb_flag(TLB_V7_UIS_PAGE))
 483                 asm("mcr p15, 0, %0, c8, c3, 1" : : "r" (kaddr) : "cc");
 484
 485         if (tlb_flag(TLB_BTB)) {
 486                 /* flush the branch target cache */
 487                 asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
 488                 dsb();
 489                 isb();
 490         }
 491         if (tlb_flag(TLB_V7_IS_BTB)) {
 492                 /* flush the branch target cache */
 493                 asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero) : "cc");
 494                 dsb();
 495                 isb();
 496         }
 497 }
 498
 499 /*
 500  *      flush_pmd_entry
 501  *
 502  *      Flush a PMD entry (word aligned, or double-word aligned) to
 503  *      RAM if the TLB for the CPU we are running on requires this.
 504  *      This is typically used when we are creating PMD entries.
 505  *
 506  *      clean_pmd_entry
 507  *
 508  *      Clean (but don't drain the write buffer) if the CPU requires
 509  *      these operations.  This is typically used when we are removing
 510  *      PMD entries.
 511  */
 512 static inline void flush_pmd_entry(pmd_t *pmd)
 513 {
 514         const unsigned int __tlb_flag = __cpu_tlb_flags;
 515
 516         if (tlb_flag(TLB_DCLEAN))
 517                 asm("mcr        p15, 0, %0, c7, c10, 1  @ flush_pmd"
 518                         : : "r" (pmd) : "cc");
 519
 520         if (tlb_flag(TLB_L2CLEAN_FR))
 521                 asm("mcr        p15, 1, %0, c15, c9, 1  @ L2 flush_pmd"
 522                         : : "r" (pmd) : "cc");
 523
 524         if (tlb_flag(TLB_WB))
 525                 dsb();
 526 }
 527
 528 static inline void clean_pmd_entry(pmd_t *pmd)
 529 {
 530         const unsigned int __tlb_flag = __cpu_tlb_flags;
 531
 532         if (tlb_flag(TLB_DCLEAN))
 533                 asm("mcr        p15, 0, %0, c7, c10, 1  @ flush_pmd"
 534                         : : "r" (pmd) : "cc");
 535
 536         if (tlb_flag(TLB_L2CLEAN_FR))
 537                 asm("mcr        p15, 1, %0, c15, c9, 1  @ L2 flush_pmd"
 538                         : : "r" (pmd) : "cc");
 539 }
 540
 541 #undef tlb_flag
 542 #undef always_tlb_flags
 543 #undef possible_tlb_flags
 544
 545 /*
 546  * Convert calls to our calling convention.
 547  */
 548 #define local_flush_tlb_range(vma,start,end)    __cpu_flush_user_tlb_range(start,end,vma)
 549 #define local_flush_tlb_kernel_range(s,e)       __cpu_flush_kern_tlb_range(s,e)
 550
 551 #ifndef CONFIG_SMP
 552 #define flush_tlb_all           local_flush_tlb_all
 553 #define flush_tlb_mm            local_flush_tlb_mm
 554 #define flush_tlb_page          local_flush_tlb_page
 555 #define flush_tlb_kernel_page   local_flush_tlb_kernel_page
 556 #define flush_tlb_range         local_flush_tlb_range
 557 #define flush_tlb_kernel_range  local_flush_tlb_kernel_range
 558 #else
 559 extern void flush_tlb_all(void);
 560 extern void flush_tlb_mm(struct mm_struct *mm);
 561 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr);
 562 extern void flush_tlb_kernel_page(unsigned long kaddr);
 563 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
 564 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
 565 #endif
 566
 567 /*
 568  * If PG_dcache_clean is not set for the page, we need to ensure that any
 569  * cache entries for the kernels virtual memory range are written
 570  * back to the page. On ARMv6 and later, the cache coherency is handled via
 571  * the set_pte_at() function.
 572  */
 573 #if __LINUX_ARM_ARCH__ < 6
 574 extern void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
 575         pte_t *ptep);
 576 #else
 577 static inline void update_mmu_cache(struct vm_area_struct *vma,
 578                                     unsigned long addr, pte_t *ptep)
 579 {
 580 }
 581 #endif
 582
 583 #endif
 584
 585 #endif /* CONFIG_MMU */
 586
 587 #endif