annotate packages/hal/arm/aeb/current/include/hal_cache.h @ 64:c38311975d4f ecos-sw-2000-01-28

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author jlarmour
date Fri, 28 Jan 2000 04:59:39 +0000
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1 #ifndef CYGONCE_HAL_CACHE_H
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2 #define CYGONCE_HAL_CACHE_H
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3
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4 //=============================================================================
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5 //
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6 // hal_cache.h
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7 //
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8 // HAL cache control API
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9 //
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10 //=============================================================================
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11 //####COPYRIGHTBEGIN####
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12 //
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13 // -------------------------------------------
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14 // The contents of this file are subject to the Red Hat eCos Public License
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15 // Version 1.0 (the "License"); you may not use this file except in
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16 // compliance with the License. You may obtain a copy of the License at
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17 // http://sourceware.cygnus.com/ecos
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18 //
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19 // Software distributed under the License is distributed on an
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20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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21 // License for the specific language governing rights and limitations under
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22 // the License.
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23 //
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24 // The Original Code is eCos - Embedded Configurable Operating System,
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25 // released September 30, 1998.
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26 //
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27 // The Initial Developer of the Original Code is Red Hat.
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28 // Portions created by Red Hat are
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29 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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30 // All Rights Reserved.
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31 // -------------------------------------------
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32 //
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33 //####COPYRIGHTEND####
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34 //=============================================================================
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35 //#####DESCRIPTIONBEGIN####
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36 //
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37 // Author(s): nickg, gthomas
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38 // Contributors: nickg, gthomas
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39 // Date: 1998-09-28
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40 // Purpose: Cache control API
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41 // Description: The macros defined here provide the HAL APIs for handling
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42 // cache control operations.
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43 // Usage:
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44 // #include <cyg/hal/hal_cache.h>
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45 // ...
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46 //
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47 //
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48 //####DESCRIPTIONEND####
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49 //
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50 //=============================================================================
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51
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52 #include <cyg/infra/cyg_type.h>
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53 #include <cyg/hal/hal_io.h>
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54
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55 //-----------------------------------------------------------------------------
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56 // Cache dimensions - one unified cache
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57
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58 #define HAL_CACHE_UNIFIED
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59
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60 #define HAL_UCACHE_SIZE 0x800 // Size of cache in bytes
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61 #define HAL_UCACHE_LINE_SIZE 4 // Size of a cache line
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62 #define HAL_UCACHE_WAYS 4 // Associativity of the cache
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63
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64 #define HAL_UCACHE_SETS (HAL_UCACHE_SIZE/(HAL_UCACHE_LINE_SIZE*HAL_UCACHE_WAYS))
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65
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66 // Cache & SRAM control
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67 #define CYG_DEVICE_CCR 0xFFFFA400
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68 #define CYG_DEVICE_LSCR 0xFFFFA404
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69 #define CYG_DEVICE_CACHE_MEM 0x60000800
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71 #define CCR_E 0x01 // Cache enabled
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72 #define CCR_S 0x02 // SRAM mode enabled
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73 #define CCR_F 0x04 // Flush mode enabled
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74 #define CCR_I 0x08 // Invalidate mode
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75
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76 #define LCSR_E 0x01 // Local SRAM enabled
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77 #define LCSR_L 0x02 // Local SRAM mapped to high memory
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78
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79 //-----------------------------------------------------------------------------
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80 // Global control of cache
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81
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82 // Enable the cache
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83 #define HAL_UCACHE_ENABLE() \
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84 { \
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85 HAL_WRITE_UINT8(CYG_DEVICE_CCR, CCR_E); \
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86 }
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87
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88 // Disable the cache
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89 #define HAL_UCACHE_DISABLE() \
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90 { \
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91 HAL_WRITE_UINT8(CYG_DEVICE_CCR, 0); \
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92 }
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93
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94 // Invalidate the entire cache
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95 #define HAL_UCACHE_INVALIDATE_ALL() \
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96 { \
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97 register cyg_uint8 old_ccr; \
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98 HAL_READ_UINT8(CYG_DEVICE_CCR, old_ccr); \
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99 HAL_WRITE_UINT8(CYG_DEVICE_CCR, CCR_I); \
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100 HAL_WRITE_UINT8(CYG_DEVICE_CCR, old_ccr); \
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101 }
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102
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103 // Synchronize the contents of the cache with memory.
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104 #define HAL_UCACHE_SYNC() \
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105 { \
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106 register volatile cyg_uint8 *cache_SRAM = \
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107 (volatile cyg_uint8*) CYG_DEVICE_CACHE_MEM; \
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108 register int i; \
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109 register cyg_uint8 old_ccr; \
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110 HAL_READ_UINT8(CYG_DEVICE_CCR, old_ccr); \
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111 HAL_WRITE_UINT8(CYG_DEVICE_CCR, CCR_F); \
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112 for (i = 0; i < HAL_DCACHE_SETS; i++) { \
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113 *cache_SRAM = 0; \
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114 cache_SRAM += HAL_DCACHE_LINE_SIZE; \
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115 } \
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116 HAL_WRITE_UINT8(CYG_DEVICE_CCR, CCR_I); \
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117 HAL_WRITE_UINT8(CYG_DEVICE_CCR, old_ccr); \
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118 }
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119
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120 // Query the state of the cache
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121 #define HAL_UCACHE_IS_ENABLED(_state_) \
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122 { \
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123 cyg_uint8 __ccr; \
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124 HAL_READ_UINT8(CYG_DEVICE_CCR, __ccr); \
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125 (_state_) = (CCR_E == __ccr) ? 1 : 0; \
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126 }
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127
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128 // Purge contents of cache
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129 #define HAL_UCACHE_PURGE_ALL() HAL_UCACHE_INVALIDATE_ALL()
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130
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131 // Set the cache refill burst size
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132 //#define HAL_UCACHE_BURST_SIZE(_size_)
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133
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134 // Set the cache write mode
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135 //#define HAL_UCACHE_WRITE_MODE( _mode_ )
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136
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137 //#define HAL_UCACHE_WRITETHRU_MODE 0
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138 //#define HAL_UCACHE_WRITEBACK_MODE 1
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139
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140 // Load the contents of the given address range into the cache
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141 // and then lock the cache so that it stays there.
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142 //#define HAL_UCACHE_LOCK(_base_, _size_)
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143
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144 // Undo a previous lock operation
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145 //#define HAL_UCACHE_UNLOCK(_base_, _size_)
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146
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147 // Unlock entire cache
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148 //#define HAL_UCACHE_UNLOCK_ALL()
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149
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150 //-----------------------------------------------------------------------------
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151 // Cache line control
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152
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153 // Allocate cache lines for the given address range without reading its
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154 // contents from memory.
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155 //#define HAL_UCACHE_ALLOCATE( _base_ , _size_ )
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156
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157 // Write dirty cache lines to memory and invalidate the cache entries
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158 // for the given address range.
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159 //#define HAL_UCACHE_FLUSH( _base_ , _size_ )
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160
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161 // Invalidate cache lines in the given range without writing to memory.
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162 //#define HAL_UCACHE_INVALIDATE( _base_ , _size_ )
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163
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164 // Write dirty cache lines to memory for the given address range.
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165 //#define HAL_UCACHE_STORE( _base_ , _size_ )
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166
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167 // Preread the given range into the cache with the intention of reading
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168 // from it later.
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169 //#define HAL_UCACHE_READ_HINT( _base_ , _size_ )
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170
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171 // Preread the given range into the cache with the intention of writing
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172 // to it later.
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173 //#define HAL_UCACHE_WRITE_HINT( _base_ , _size_ )
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174
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175 // Allocate and zero the cache lines associated with the given range.
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176 //#define HAL_UCACHE_ZERO( _base_ , _size_ )
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177
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178 //-----------------------------------------------------------------------------
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179
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180 //-----------------------------------------------------------------------------
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181 // Data and instruction cache macros map onto the both-cache macros
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182
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183 //-----------------------------------------------------------------------------
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184 // Global control of data cache
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185
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186 #define HAL_DCACHE_SIZE HAL_UCACHE_SIZE
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187 #define HAL_DCACHE_LINE_SIZE HAL_UCACHE_LINE_SIZE
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188 #define HAL_DCACHE_WAYS HAL_UCACHE_WAYS
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189 #define HAL_DCACHE_SETS HAL_UCACHE_SETS
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190
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191 // Enable the data cache
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192 #define HAL_DCACHE_ENABLE() HAL_UCACHE_ENABLE()
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193
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194 // Disable the data cache
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195 #define HAL_DCACHE_DISABLE() HAL_UCACHE_DISABLE()
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196
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197 // Invalidate the entire cache
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198 #define HAL_DCACHE_INVALIDATE_ALL() HAL_UCACHE_INVALIDATE_ALL()
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199
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200 // Synchronize the contents of the cache with memory.
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201 #define HAL_DCACHE_SYNC() HAL_UCACHE_SYNC()
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202
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203 // Query the state of the data cache
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204 #define HAL_DCACHE_IS_ENABLED(_state_) HAL_UCACHE_IS_ENABLED(_state_)
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205
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206 // Set the data cache refill burst size
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207 //#define HAL_DCACHE_BURST_SIZE(_size_)
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208
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209 // Set the data cache write mode
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210 //#define HAL_DCACHE_WRITE_MODE( _mode_ )
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211
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212 //#define HAL_DCACHE_WRITETHRU_MODE 0
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213 //#define HAL_DCACHE_WRITEBACK_MODE 1
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214
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215 // Load the contents of the given address range into the data cache
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216 // and then lock the cache so that it stays there.
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217 //#define HAL_DCACHE_LOCK(_base_, _size_)
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218
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219 // Undo a previous lock operation
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220 //#define HAL_DCACHE_UNLOCK(_base_, _size_)
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221
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222 // Unlock entire cache
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223 //#define HAL_DCACHE_UNLOCK_ALL()
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224
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225 //-----------------------------------------------------------------------------
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226 // Data cache line control
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227
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228 // Allocate cache lines for the given address range without reading its
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229 // contents from memory.
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230 //#define HAL_DCACHE_ALLOCATE( _base_ , _size_ )
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231
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232 // Write dirty cache lines to memory and invalidate the cache entries
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233 // for the given address range.
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234 //#define HAL_DCACHE_FLUSH( _base_ , _size_ )
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235
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236 // Invalidate cache lines in the given range without writing to memory.
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237 //#define HAL_DCACHE_INVALIDATE( _base_ , _size_ )
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238
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239 // Write dirty cache lines to memory for the given address range.
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240 //#define HAL_DCACHE_STORE( _base_ , _size_ )
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241
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242 // Preread the given range into the cache with the intention of reading
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243 // from it later.
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244 //#define HAL_DCACHE_READ_HINT( _base_ , _size_ )
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245
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246 // Preread the given range into the cache with the intention of writing
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247 // to it later.
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248 //#define HAL_DCACHE_WRITE_HINT( _base_ , _size_ )
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249
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250 // Allocate and zero the cache lines associated with the given range.
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251 //#define HAL_DCACHE_ZERO( _base_ , _size_ )
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252
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253 //-----------------------------------------------------------------------------
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254 // Global control of Instruction cache
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255
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256 #define HAL_ICACHE_SIZE HAL_UCACHE_SIZE
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257 #define HAL_ICACHE_LINE_SIZE HAL_UCACHE_LINE_SIZE
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258 #define HAL_ICACHE_WAYS HAL_UCACHE_WAYS
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259 #define HAL_ICACHE_SETS HAL_UCACHE_SETS
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260
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261 // Enable the instruction cache
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262 #define HAL_ICACHE_ENABLE() HAL_UCACHE_ENABLE()
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263
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264 // Disable the instruction cache
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265 #define HAL_ICACHE_DISABLE() HAL_UCACHE_DISABLE()
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266
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267 // Invalidate the entire cache
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268 #define HAL_ICACHE_INVALIDATE_ALL() HAL_UCACHE_INVALIDATE_ALL()
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269
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270
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271 // Synchronize the contents of the cache with memory.
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272 #define HAL_ICACHE_SYNC() HAL_UCACHE_SYNC()
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273
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274 // Query the state of the instruction cache
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275 #define HAL_ICACHE_IS_ENABLED(_state_) HAL_UCACHE_IS_ENABLED(_state_)
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276
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277 // Set the instruction cache refill burst size
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278 //#define HAL_ICACHE_BURST_SIZE(_size_)
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279
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280 // Load the contents of the given address range into the instruction cache
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281 // and then lock the cache so that it stays there.
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282
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283 //#define HAL_ICACHE_LOCK(_base_, _size_)
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284
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285 // Undo a previous lock operation
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286 //#define HAL_ICACHE_UNLOCK(_base_, _size_)
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287
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288 // Unlock entire cache
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289 //#define HAL_ICACHE_UNLOCK_ALL()
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290
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291 //-----------------------------------------------------------------------------
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292 // Instruction cache line control
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293
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294 // Invalidate cache lines in the given range without writing to memory.
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295 //#define HAL_ICACHE_INVALIDATE( _base_ , _size_ )
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296
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297 #endif // ifndef CYGONCE_HAL_CACHE_H
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298 // End of hal_cache.h