arch/xtensa/include/asm/cacheasm.h

   1 /*
   2  * include/asm-xtensa/cacheasm.h
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2006 Tensilica Inc.
   9  */
  10
  11 #include <asm/cache.h>
  12 #include <asm/asmmacro.h>
  13 #include <linux/stringify.h>
  14
  15 /*
  16  * Define cache functions as macros here so that they can be used
  17  * by the kernel and boot loader. We should consider moving them to a
  18  * library that can be linked by both.
  19  *
  20  * Locking
  21  *
  22  *   ___unlock_dcache_all
  23  *   ___unlock_icache_all
  24  *
  25  * Flush and invaldating
  26  *
  27  *   ___flush_invalidate_dcache_{all|range|page}
  28  *   ___flush_dcache_{all|range|page}
  29  *   ___invalidate_dcache_{all|range|page}
  30  *   ___invalidate_icache_{all|range|page}
  31  *
  32  */
  33
  34
  35         .macro  __loop_cache_unroll ar at insn size line_width max_immed
  36
  37         .if     (1 << (\line_width)) > (\max_immed)
  38         .set    _reps, 1
  39         .elseif (2 << (\line_width)) > (\max_immed)
  40         .set    _reps, 2
  41         .else
  42         .set    _reps, 4
  43         .endif
  44
  45         __loopi \ar, \at, \size, (_reps << (\line_width))
  46         .set    _index, 0
  47         .rep    _reps
  48         \insn   \ar, _index << (\line_width)
  49         .set    _index, _index + 1
  50         .endr
  51         __endla \ar, \at, _reps << (\line_width)
  52
  53         .endm
  54
  55
  56         .macro  __loop_cache_all ar at insn size line_width max_immed
  57
  58         movi    \ar, 0
  59         __loop_cache_unroll \ar, \at, \insn, \size, \line_width, \max_immed
  60
  61         .endm
  62
  63
  64         .macro  __loop_cache_range ar as at insn line_width
  65
  66         extui   \at, \ar, 0, \line_width
  67         add     \as, \as, \at
  68
  69         __loops \ar, \as, \at, \line_width
  70         \insn   \ar, 0
  71         __endla \ar, \at, (1 << (\line_width))
  72
  73         .endm
  74
  75
  76         .macro  __loop_cache_page ar at insn line_width max_immed
  77
  78         __loop_cache_unroll \ar, \at, \insn, PAGE_SIZE, \line_width, \max_immed
  79
  80         .endm
  81
  82
  83         .macro  ___unlock_dcache_all ar at
  84
  85 #if XCHAL_DCACHE_LINE_LOCKABLE && XCHAL_DCACHE_SIZE
  86         __loop_cache_all \ar \at diu XCHAL_DCACHE_SIZE \
  87                 XCHAL_DCACHE_LINEWIDTH 240
  88 #endif
  89
  90         .endm
  91
  92
  93         .macro  ___unlock_icache_all ar at
  94
  95 #if XCHAL_ICACHE_LINE_LOCKABLE && XCHAL_ICACHE_SIZE
  96         __loop_cache_all \ar \at iiu XCHAL_ICACHE_SIZE \
  97                 XCHAL_ICACHE_LINEWIDTH 240
  98 #endif
  99
 100         .endm
 101
 102
 103         .macro  ___flush_invalidate_dcache_all ar at
 104
 105 #if XCHAL_DCACHE_SIZE
 106         __loop_cache_all \ar \at diwbi XCHAL_DCACHE_SIZE \
 107                 XCHAL_DCACHE_LINEWIDTH 240
 108 #endif
 109
 110         .endm
 111
 112
 113         .macro  ___flush_dcache_all ar at
 114
 115 #if XCHAL_DCACHE_SIZE
 116         __loop_cache_all \ar \at diwb XCHAL_DCACHE_SIZE \
 117                 XCHAL_DCACHE_LINEWIDTH 240
 118 #endif
 119
 120         .endm
 121
 122
 123         .macro  ___invalidate_dcache_all ar at
 124
 125 #if XCHAL_DCACHE_SIZE
 126         __loop_cache_all \ar \at dii XCHAL_DCACHE_SIZE \
 127                          XCHAL_DCACHE_LINEWIDTH 1020
 128 #endif
 129
 130         .endm
 131
 132
 133         .macro  ___invalidate_icache_all ar at
 134
 135 #if XCHAL_ICACHE_SIZE
 136         __loop_cache_all \ar \at iii XCHAL_ICACHE_SIZE \
 137                          XCHAL_ICACHE_LINEWIDTH 1020
 138 #endif
 139
 140         .endm
 141
 142
 143
 144         .macro  ___flush_invalidate_dcache_range ar as at
 145
 146 #if XCHAL_DCACHE_SIZE
 147         __loop_cache_range \ar \as \at dhwbi XCHAL_DCACHE_LINEWIDTH
 148 #endif
 149
 150         .endm
 151
 152
 153         .macro  ___flush_dcache_range ar as at
 154
 155 #if XCHAL_DCACHE_SIZE
 156         __loop_cache_range \ar \as \at dhwb XCHAL_DCACHE_LINEWIDTH
 157 #endif
 158
 159         .endm
 160
 161
 162         .macro  ___invalidate_dcache_range ar as at
 163
 164 #if XCHAL_DCACHE_SIZE
 165         __loop_cache_range \ar \as \at dhi XCHAL_DCACHE_LINEWIDTH
 166 #endif
 167
 168         .endm
 169
 170
 171         .macro  ___invalidate_icache_range ar as at
 172
 173 #if XCHAL_ICACHE_SIZE
 174         __loop_cache_range \ar \as \at ihi XCHAL_ICACHE_LINEWIDTH
 175 #endif
 176
 177         .endm
 178
 179
 180
 181         .macro  ___flush_invalidate_dcache_page ar as
 182
 183 #if XCHAL_DCACHE_SIZE
 184         __loop_cache_page \ar \as dhwbi XCHAL_DCACHE_LINEWIDTH 1020
 185 #endif
 186
 187         .endm
 188
 189
 190         .macro ___flush_dcache_page ar as
 191
 192 #if XCHAL_DCACHE_SIZE
 193         __loop_cache_page \ar \as dhwb XCHAL_DCACHE_LINEWIDTH 1020
 194 #endif
 195
 196         .endm
 197
 198
 199         .macro  ___invalidate_dcache_page ar as
 200
 201 #if XCHAL_DCACHE_SIZE
 202         __loop_cache_page \ar \as dhi XCHAL_DCACHE_LINEWIDTH 1020
 203 #endif
 204
 205         .endm
 206
 207
 208         .macro  ___invalidate_icache_page ar as
 209
 210 #if XCHAL_ICACHE_SIZE
 211         __loop_cache_page \ar \as ihi XCHAL_ICACHE_LINEWIDTH 1020
 212 #endif
 213
 214         .endm