Mercurial > flash_v2
annotate packages/hal/mips/arch/current/include/hal_cache.h @ 6:d376b777e2ce ecos-sw-1999-05-14
Merge from eCos master repository on 1999-05-14-19:27:43-BST
| author | jlarmour |
|---|---|
| date | Fri, 14 May 1999 12:20:00 +0000 |
| parents | 443894e2e912 |
| children | d3fbcdfa1b2f |
| rev | line source |
|---|---|
| 0 | 1 #ifndef CYGONCE_HAL_CACHE_H |
| 2 #define CYGONCE_HAL_CACHE_H | |
| 3 | |
| 4 //============================================================================= | |
| 5 // | |
| 2 | 6 // hal_cache.h |
| 0 | 7 // |
| 2 | 8 // HAL cache control API |
| 0 | 9 // |
| 10 //============================================================================= | |
| 11 //####COPYRIGHTBEGIN#### | |
| 12 // | |
| 13 // ------------------------------------------- | |
| 14 // The contents of this file are subject to the Cygnus eCos Public License | |
| 15 // Version 1.0 (the "License"); you may not use this file except in | |
| 16 // compliance with the License. You may obtain a copy of the License at | |
| 17 // http://sourceware.cygnus.com/ecos | |
| 18 // | |
| 19 // Software distributed under the License is distributed on an "AS IS" | |
| 20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the | |
| 21 // License for the specific language governing rights and limitations under | |
| 22 // the License. | |
| 23 // | |
| 24 // The Original Code is eCos - Embedded Cygnus Operating System, released | |
| 25 // September 30, 1998. | |
| 26 // | |
| 27 // The Initial Developer of the Original Code is Cygnus. Portions created | |
| 2 | 28 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. |
| 0 | 29 // ------------------------------------------- |
| 30 // | |
| 31 //####COPYRIGHTEND#### | |
| 32 //============================================================================= | |
| 33 //#####DESCRIPTIONBEGIN#### | |
| 34 // | |
| 2 | 35 // Author(s): nickg |
| 36 // Contributors: nickg | |
| 37 // Date: 1998-02-17 | |
| 38 // Purpose: Cache control API | |
| 39 // Description: The macros defined here provide the HAL APIs for handling | |
| 0 | 40 // cache control operations. |
| 41 // Usage: | |
| 2 | 42 // #include <cyg/hal/hal_cache.h> |
| 43 // ... | |
| 44 // | |
| 0 | 45 // |
| 46 //####DESCRIPTIONEND#### | |
| 47 // | |
| 48 //============================================================================= | |
| 49 | |
| 2 | 50 #include <pkgconf/hal.h> |
| 0 | 51 #include <cyg/infra/cyg_type.h> |
| 52 | |
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53 #include <cyg/hal/var_cache.h> |
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54 |
| 0 | 55 //============================================================================= |
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56 // Default Implementation. This uses the standard MIPS CP0 registers and |
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57 // cache instructions. Note that not all variants will have all of the |
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58 // functionality defined here. |
| 0 | 59 |
| 60 //----------------------------------------------------------------------------- | |
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61 // Cache dimensions. |
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62 // These really should be defined in var_cache.h. If they are not, then provide |
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63 // a set of numbers that are typical of many variants. |
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64 |
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65 #ifndef HAL_DCACHE_SIZE |
| 0 | 66 |
| 67 // Data cache | |
| 68 #define HAL_DCACHE_SIZE 4096 // Size of data cache in bytes | |
| 69 #define HAL_DCACHE_LINE_SIZE 16 // Size of a data cache line | |
| 70 #define HAL_DCACHE_WAYS 2 // Associativity of the cache | |
| 71 | |
| 72 // Instruction cache | |
| 73 #define HAL_ICACHE_SIZE 4096 // Size of cache in bytes | |
| 74 #define HAL_ICACHE_LINE_SIZE 16 // Size of a cache line | |
| 75 #define HAL_ICACHE_WAYS 2 // Associativity of the cache | |
| 76 | |
| 77 #define HAL_DCACHE_SETS (HAL_DCACHE_SIZE/(HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS)) | |
| 78 #define HAL_ICACHE_SETS (HAL_ICACHE_SIZE/(HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS)) | |
| 79 | |
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80 #endif |
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81 |
| 0 | 82 //----------------------------------------------------------------------------- |
| 83 // Global control of data cache | |
| 84 | |
| 85 // Enable the data cache | |
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86 // There is no default mechanism for enabling or disabling the caches. |
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87 #ifndef HAL_DCACHE_ENABLE_DEFINED |
| 0 | 88 #define HAL_DCACHE_ENABLE() |
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89 #endif |
| 0 | 90 |
| 91 // Disable the data cache | |
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92 #ifndef HAL_DCACHE_DISABLE_DEFINED |
| 0 | 93 #define HAL_DCACHE_DISABLE() |
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94 #endif |
| 0 | 95 |
| 96 // Invalidate the entire cache | |
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97 // We simply use HAL_DCACHE_SYNC() to do this. For writeback caches this |
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98 // is not quite what we want, but there is no index-invalidate operation |
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99 // available. |
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100 #ifndef HAL_DCACHE_INVALIDATE_ALL_DEFINED |
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101 #define HAL_DCACHE_INVALIDATE_ALL() HAL_DCACHE_SYNC() |
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102 #endif |
| 0 | 103 |
| 104 // Synchronize the contents of the cache with memory. | |
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105 // This uses the index-writeback-invalidate operation. |
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106 #ifndef HAL_DCACHE_SYNC_DEFINED |
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107 #define HAL_DCACHE_SYNC() \ |
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108 { \ |
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109 register CYG_ADDRESS _baddr_ = 0x80000000; \ |
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110 register CYG_ADDRESS _addr_ = 0x80000000; \ |
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111 register CYG_WORD _size_ = HAL_DCACHE_SIZE; \ |
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112 HAL_DCACHE_DISABLE(); \ |
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113 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
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114 { \ |
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115 asm volatile ("cache 0x01,0(%0)" : : "r"(_addr_) ); \ |
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116 } \ |
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117 HAL_DCACHE_ENABLE(); \ |
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118 } |
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119 #endif |
| 0 | 120 |
| 121 // Set the data cache refill burst size | |
| 122 //#define HAL_DCACHE_BURST_SIZE(_size_) | |
| 123 | |
| 124 // Set the data cache write mode | |
| 125 //#define HAL_DCACHE_WRITE_MODE( _mode_ ) | |
| 126 | |
| 127 //#define HAL_DCACHE_WRITETHRU_MODE 0 | |
| 128 //#define HAL_DCACHE_WRITEBACK_MODE 1 | |
| 129 | |
| 130 // Load the contents of the given address range into the data cache | |
| 131 // and then lock the cache so that it stays there. | |
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132 // This uses the fetch-and-lock cache operation. |
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133 #ifndef HAL_DCACHE_LOCK_DEFINED |
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134 #define HAL_DCACHE_LOCK(_base_, _asize_) \ |
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135 CYG_MACRO_START \ |
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136 register CYG_ADDRESS _baddr_ = (CYG_ADDRESS)(_base_); \ |
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137 register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ |
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138 register CYG_WORD _size_ = (_asize_); \ |
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139 HAL_DCACHE_DISABLE(); \ |
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140 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
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141 { \ |
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142 asm volatile ("cache 0x1d,0(%0)" : : "r"(_addr_) ); \ |
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143 } \ |
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144 HAL_DCACHE_ENABLE(); \ |
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145 CYG_MACRO_END |
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146 #endif |
| 0 | 147 |
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148 // Undo a previous lock operation. |
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149 // Do this by flushing the cache, which is defined to clear the lock bit. |
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150 #ifndef HAL_DCACHE_UNLOCK_DEFINED |
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151 #define HAL_DCACHE_UNLOCK(_base_, _size_) \ |
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152 HAL_DCACHE_FLUSH( _base_, _size_ ) |
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153 #endif |
| 0 | 154 |
| 2 | 155 // Unlock entire cache |
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156 #ifndef HAL_DCACHE_UNLOCK_ALL_DEFINED |
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157 #define HAL_DCACHE_UNLOCK_ALL() \ |
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158 HAL_DCACHE_INVALIDATE_ALL() |
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159 #endif |
| 2 | 160 |
| 0 | 161 //----------------------------------------------------------------------------- |
| 162 // Data cache line control | |
| 163 | |
| 164 // Allocate cache lines for the given address range without reading its | |
| 165 // contents from memory. | |
| 166 //#define HAL_DCACHE_ALLOCATE( _base_ , _size_ ) | |
| 167 | |
| 168 // Write dirty cache lines to memory and invalidate the cache entries | |
| 169 // for the given address range. | |
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170 // This uses the hit-writeback-invalidate cache operation. |
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171 #ifndef HAL_DCACHE_FLUSH_DEFINED |
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172 #define HAL_DCACHE_FLUSH( _base_ , _asize_ ) \ |
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173 { \ |
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174 register CYG_ADDRESS _baddr_ = (CYG_ADDRESS)(_base_); \ |
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175 register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ |
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176 register CYG_WORD _size_ = (_asize_); \ |
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177 HAL_DCACHE_DISABLE(); \ |
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178 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
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179 { \ |
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180 asm volatile ("cache 0x15,0(%0)" : : "r"(_addr_) ); \ |
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181 } \ |
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182 HAL_DCACHE_ENABLE(); \ |
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183 } |
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184 #endif |
| 0 | 185 |
| 186 // Invalidate cache lines in the given range without writing to memory. | |
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187 // This uses the hit-invalidate cache operation. |
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188 #ifndef HAL_DCACHE_INVALIDATE_DEFINED |
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189 #define HAL_DCACHE_INVALIDATE( _base_ , _asize_ ) \ |
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190 { \ |
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191 register CYG_ADDRESS _baddr_ = (CYG_ADDRESS)(_base_); \ |
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192 register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ |
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193 register CYG_WORD _size_ = (_asize_); \ |
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194 HAL_DCACHE_DISABLE(); \ |
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195 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
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196 { \ |
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197 asm volatile ("cache 0x11,0(%0)" : : "r"(_addr_) ); \ |
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198 } \ |
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199 HAL_DCACHE_ENABLE(); \ |
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200 } |
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201 #endif |
| 0 | 202 |
| 203 // Write dirty cache lines to memory for the given address range. | |
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204 // This uses the hit-writeback cache operation. |
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205 #ifndef HAL_DCACHE_STORE_DEFINED |
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206 #define HAL_DCACHE_STORE( _base_ , _asize_ ) \ |
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207 { \ |
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208 register CYG_ADDRESS _baddr_ = (CYG_ADDRESS)(_base_); \ |
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209 register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ |
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210 register CYG_WORD _size_ = (_asize_); \ |
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211 HAL_DCACHE_DISABLE(); \ |
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212 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
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213 { \ |
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214 asm volatile ("cache 0x19,0(%0)" : : "r"(_addr_) ); \ |
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215 } \ |
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216 HAL_DCACHE_ENABLE(); \ |
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217 } |
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218 #endif |
| 0 | 219 |
| 220 // Preread the given range into the cache with the intention of reading | |
| 221 // from it later. | |
| 222 //#define HAL_DCACHE_READ_HINT( _base_ , _size_ ) | |
| 223 | |
| 224 // Preread the given range into the cache with the intention of writing | |
| 225 // to it later. | |
| 226 //#define HAL_DCACHE_WRITE_HINT( _base_ , _size_ ) | |
| 227 | |
| 228 // Allocate and zero the cache lines associated with the given range. | |
| 229 //#define HAL_DCACHE_ZERO( _base_ , _size_ ) | |
| 230 | |
| 231 //----------------------------------------------------------------------------- | |
| 232 // Global control of Instruction cache | |
| 233 | |
| 234 // Enable the instruction cache | |
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235 // There is no default mechanism for enabling or disabling the caches. |
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236 #ifndef HAL_ICACHE_ENABLE_DEFINED |
| 0 | 237 #define HAL_ICACHE_ENABLE() |
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238 #endif |
| 0 | 239 |
| 240 // Disable the instruction cache | |
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241 #ifndef HAL_ICACHE_DISABLE_DEFINED |
| 0 | 242 #define HAL_ICACHE_DISABLE() |
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243 #endif |
| 0 | 244 |
| 245 // Invalidate the entire cache | |
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246 // This uses the index-invalidate cache operation. |
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247 #ifndef HAL_ICACHE_INVALIDATE_ALL_DEFINED |
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248 #define HAL_ICACHE_INVALIDATE_ALL() \ |
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249 { \ |
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250 register CYG_ADDRESS _baddr_ = 0x80000000; \ |
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251 register CYG_ADDRESS _addr_ = 0x80000000; \ |
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252 HAL_ICACHE_DISABLE(); \ |
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253 for( ; _addr_ < _baddr_+HAL_ICACHE_SIZE; _addr_ += HAL_ICACHE_LINE_SIZE ) \ |
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254 { \ |
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255 asm volatile ("cache 0x00,0(%0)" : : "r"(_addr_) ); \ |
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256 } \ |
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257 HAL_ICACHE_ENABLE(); \ |
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258 } |
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259 #endif |
| 0 | 260 |
| 261 // Synchronize the contents of the cache with memory. | |
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262 // Simply force the cache to reload. |
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263 #ifndef HAL_ICACHE_SYNC_DEFINED |
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264 #define HAL_ICACHE_SYNC() HAL_ICACHE_INVALIDATE_ALL() |
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265 #endif |
| 0 | 266 |
| 267 // Set the instruction cache refill burst size | |
| 268 //#define HAL_ICACHE_BURST_SIZE(_size_) | |
| 269 | |
| 270 // Load the contents of the given address range into the instruction cache | |
| 271 // and then lock the cache so that it stays there. | |
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272 // This uses the fetch-and-lock cache operation. |
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273 #ifndef HAL_ICACHE_LOCK_DEFINED |
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274 #define HAL_ICACHE_LOCK(_base_, _asize_) \ |
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275 CYG_MACRO_START \ |
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276 register CYG_ADDRESS _baddr_ = (CYG_ADDRESS)(_base_); \ |
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277 register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ |
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278 register CYG_WORD _size_ = (_asize_); \ |
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279 HAL_DCACHE_DISABLE(); \ |
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280 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
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281 { \ |
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282 asm volatile ("cache 0x1c,0(%0)" : : "r"(_addr_) ); \ |
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283 } \ |
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284 HAL_DCACHE_ENABLE(); \ |
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285 CYG_MACRO_END |
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286 #endif |
| 0 | 287 |
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288 // Undo a previous lock operation. |
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289 // Do this by invalidating the cache, which is defined to clear the lock bit. |
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290 #ifndef HAL_ICACHE_UNLOCK_DEFINED |
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291 #define HAL_ICACHE_UNLOCK(_base_, _size_) \ |
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292 HAL_ICACHE_INVALIDATE( _base_, _size_ ) |
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293 #endif |
| 0 | 294 |
| 2 | 295 // Unlock entire cache |
| 296 //#define HAL_ICACHE_UNLOCK_ALL() | |
| 297 | |
| 0 | 298 //----------------------------------------------------------------------------- |
| 299 // Instruction cache line control | |
| 300 | |
| 301 // Invalidate cache lines in the given range without writing to memory. | |
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302 // This uses the hit-invalidate cache operation. |
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303 #ifndef HAL_ICACHE_INVALIDATE_DEFINED |
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304 #define HAL_ICACHE_INVALIDATE( _base_ , _asize_ ) \ |
| 0 | 305 { \ |
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306 register CYG_ADDRESS _baddr_ = (CYG_ADDRESS)(_base_); \ |
| 0 | 307 register CYG_ADDRESS _addr_ = (CYG_ADDRESS)(_base_); \ |
| 308 register CYG_WORD _size_ = (_asize_); \ | |
| 309 HAL_DCACHE_DISABLE(); \ | |
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310 for( ; _addr_ <= _baddr_+_size_; _addr_ += HAL_DCACHE_LINE_SIZE ) \ |
| 0 | 311 { \ |
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312 asm volatile ("cache 0x10,0(%0)" : : "r"(_addr_) ); \ |
| 0 | 313 } \ |
| 314 HAL_DCACHE_ENABLE(); \ | |
| 315 } | |
| 316 #endif | |
| 317 | |
| 318 //----------------------------------------------------------------------------- | |
| 2 | 319 // Check that a supported configuration has actually defined some macros. |
| 320 | |
| 321 #ifndef HAL_DCACHE_ENABLE | |
| 322 | |
| 323 #error Unsupported MIPS configuration | |
| 324 | |
| 325 #endif | |
| 326 | |
| 327 //----------------------------------------------------------------------------- | |
| 0 | 328 #endif // ifndef CYGONCE_HAL_CACHE_H |
| 329 // End of hal_cache.h |
