packages/hal/arm/mxc91221/var/v2_0/include/hal_cache.h

   1 #ifndef CYGONCE_HAL_CACHE_H
   2 #define CYGONCE_HAL_CACHE_H
   3
   4 //=============================================================================
   5 //
   6 //      hal_cache.h
   7 //
   8 //      HAL cache control API
   9 //
  10 //=============================================================================
  11 //####ECOSGPLCOPYRIGHTBEGIN####
  12 // -------------------------------------------
  13 // This file is part of eCos, the Embedded Configurable Operating System.
  14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
  15 //
  16 // eCos is free software; you can redistribute it and/or modify it under
  17 // the terms of the GNU General Public License as published by the Free
  18 // Software Foundation; either version 2 or (at your option) any later version.
  19 //
  20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
  21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
  22 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  23 // for more details.
  24 //
  25 // You should have received a copy of the GNU General Public License along
  26 // with eCos; if not, write to the Free Software Foundation, Inc.,
  27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  28 //
  29 // As a special exception, if other files instantiate templates or use macros
  30 // or inline functions from this file, or you compile this file and link it
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  33 // License. However the source code for this file must still be made available
  34 // in accordance with section (3) of the GNU General Public License.
  35 //
  36 // This exception does not invalidate any other reasons why a work based on
  37 // this file might be covered by the GNU General Public License.
  38 //
  39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
  40 // at http://sources.redhat.com/ecos/ecos-license/
  41 // -------------------------------------------
  42 //####ECOSGPLCOPYRIGHTEND####
  43 //=============================================================================
  44
  45 #include <cyg/infra/cyg_type.h>
  46 #include <cyg/hal/hal_soc.h>         // Variant specific hardware definitions
  47
  48 //-----------------------------------------------------------------------------
  49 // Cache dimensions
  50
  51 // Data cache
  52 #define HAL_DCACHE_SIZE                 0x4000    // 16KB Size of data cache in bytes
  53 #define HAL_DCACHE_LINE_SIZE            32    // Size of a data cache line
  54 #define HAL_DCACHE_WAYS                 64    // Associativity of the cache
  55
  56 // Instruction cache
  57 #define HAL_ICACHE_SIZE                 0x4000    // Size of cache in bytes
  58 #define HAL_ICACHE_LINE_SIZE            32    // Size of a cache line
  59 #define HAL_ICACHE_WAYS                 64    // Associativity of the cache
  60
  61 #define HAL_DCACHE_SETS (HAL_DCACHE_SIZE / (HAL_DCACHE_LINE_SIZE*HAL_DCACHE_WAYS))
  62 #define HAL_ICACHE_SETS (HAL_ICACHE_SIZE / (HAL_ICACHE_LINE_SIZE*HAL_ICACHE_WAYS))
  63
  64 #define CYGHWR_HAL_ARM_ARM9_CLEAN_DCACHE_INDEX
  65 #define CYGHWR_HAL_ARM_ARM9_CLEAN_DCACHE_INDEX_STEP  0x20
  66 #define CYGHWR_HAL_ARM_ARM9_CLEAN_DCACHE_INDEX_LIMIT 0x100
  67 //-----------------------------------------------------------------------------
  68 // Global control of data cache
  69
  70 // Enable the data cache
  71 #define HAL_DCACHE_ENABLE()                                          \
  72 CYG_MACRO_START                                                         \
  73     asm volatile (                                                      \
  74         "mrc p15, 0, r1, c1, c0, 0;"                                    \
  75         "orr r1, r1, #0x0007;" /* enable DCache (also ensures */        \
  76                                /* the MMU, alignment faults, and */       \
  77         "mcr p15, 0, r1, c1, c0, 0"                                     \
  78         :                                                               \
  79         :                                                               \
  80         : "r1" /* Clobber list */                                       \
  81         );                                                              \
  82 CYG_MACRO_END
  83
  84 // Disable the data cache
  85 #define HAL_DCACHE_DISABLE()    \
  86 CYG_MACRO_START                                                         \
  87     asm volatile (                                                      \
  88         "mov r1, #0;"                                                   \
  89         "mcr p15, 0, r1, c7, c6, 0;" /* clear data cache */             \
  90         "mrc p15, 0, r1, c1, c0, 0;"                                    \
  91         "bic r1, r1, #0x0004;" /* disable DCache  */                    \
  92                              /* but not MMU and alignment faults */     \
  93         "mcr p15, 0, r1, c1, c0, 0"                                     \
  94         :                                                               \
  95         :                                                               \
  96         : "r1" /* Clobber list */                                       \
  97     );                                                                  \
  98 CYG_MACRO_END
  99
 100 // Invalidate the entire cache
 101 #define HAL_DCACHE_INVALIDATE_ALL()                                  \
 102 CYG_MACRO_START  /* this macro can discard dirty cache lines. */        \
 103     asm volatile (                                                      \
 104         "mov r0, #0;"                                                   \
 105         "mcr p15, 0, r0, c7, c6, 0;" /* flush d-cache */                \
 106         "mcr p15, 0, r0, c8, c7, 0;" /* flush i+d-TLBs */               \
 107         :                                                               \
 108         :                                                               \
 109         : "r0","memory" /* clobber list */);                            \
 110 CYG_MACRO_END
 111
 112 // Synchronize the contents of the cache with memory.
 113 // using ARM9's defined(CYGHWR_HAL_ARM_ARM9_CLEAN_DCACHE_INDEX)
 114 #define HAL_DCACHE_SYNC()                                           \
 115 CYG_MACRO_START                                                        \
 116     asm volatile (                                                     \
 117         "nop; "                                                        \
 118         "nop; "                                                        \
 119         "nop; "                                                        \
 120         "nop; "                                                        \
 121         "nop; "                                                        \
 122         "nop; "                                                        \
 123         "1: "                                                          \
 124         "mrc p15, 0, r15, c7, c14, 3;"                                 \
 125         "bne 1b;"                                                      \
 126         "mov r0, #0x0;"                                                \
 127         "mcr p15, 0, r0, c7, c10, 4;" /* drain the write buffer */     \
 128         :                                                              \
 129         :                                                              \
 130         : "r0" /* Clobber list */                                      \
 131         );                                                             \
 132 CYG_MACRO_END
 133
 134 // Query the state of the data cache
 135 #define HAL_DCACHE_IS_ENABLED(_state_)                                  \
 136 CYG_MACRO_START                                                         \
 137     register int reg;                                                   \
 138     asm volatile (                                                      \
 139         "nop; "                                                         \
 140         "nop; "                                                         \
 141         "nop; "                                                         \
 142         "nop; "                                                         \
 143         "nop; "                                                         \
 144         "mrc p15, 0, %0, c1, c0, 0;"                                    \
 145                   : "=r"(reg)                                           \
 146                   :                                                     \
 147         );                                                              \
 148     (_state_) = (0 != (4 & reg)); /* Bit 2 is DCache enable */          \
 149 CYG_MACRO_END
 150
 151 //-----------------------------------------------------------------------------
 152 // Global control of Instruction cache
 153
 154 // Enable the instruction cache
 155 #define HAL_ICACHE_ENABLE()                                          \
 156 CYG_MACRO_START                                                         \
 157     asm volatile (                                                      \
 158         "mrc p15, 0, r1, c1, c0, 0;"                                    \
 159         "orr r1, r1, #0x1000;"                                          \
 160         "orr r1, r1, #0x0003;"  /* enable ICache (also ensures   */     \
 161                                 /* that MMU and alignment faults */     \
 162                                 /* are enabled)                  */     \
 163         "mcr p15, 0, r1, c1, c0, 0"                                     \
 164         :                                                               \
 165         :                                                               \
 166         : "r1" /* Clobber list */                                       \
 167         );                                                              \
 168 CYG_MACRO_END
 169
 170 // Query the state of the instruction cache
 171 #define HAL_ICACHE_IS_ENABLED(_state_)                                  \
 172 CYG_MACRO_START                                                         \
 173     register cyg_uint32 reg;                                            \
 174     asm volatile (                                                      \
 175         "mrc p15, 0, %0, c1, c0, 0"                                     \
 176         : "=r"(reg)                                                     \
 177         :                                                               \
 178         );                                                              \
 179                                                                         \
 180     (_state_) = (0 != (0x1000 & reg)); /* Bit 12 is ICache enable */    \
 181 CYG_MACRO_END
 182
 183 // Disable the instruction cache
 184 #define HAL_ICACHE_DISABLE()                                         \
 185 CYG_MACRO_START                                                         \
 186     asm volatile (                                                      \
 187         "mrc p15, 0, r1, c1, c0, 0;"                                    \
 188         "bic r1, r1, #0x1000;" /* disable ICache (but not MMU, etc) */  \
 189         "mcr p15, 0, r1, c1, c0, 0;"                                    \
 190         "mov r1, #0;"                                                   \
 191         "mcr p15, 0, r1, c7, c5, 0;"  /* flush ICache */                \
 192         "nop;" /* next few instructions may be via cache    */          \
 193         "nop;"                                                          \
 194         "nop;"                                                          \
 195         "nop;"                                                          \
 196         "nop;"                                                          \
 197         "nop"                                                           \
 198         :                                                               \
 199         :                                                               \
 200         : "r1" /* Clobber list */                                       \
 201         );                                                              \
 202 CYG_MACRO_END
 203
 204 // Invalidate the entire cache
 205 #define HAL_ICACHE_INVALIDATE_ALL()                                  \
 206 CYG_MACRO_START                                                         \
 207     /* this macro can discard dirty cache lines (N/A for ICache) */     \
 208     asm volatile (                                                      \
 209         "mov r1, #0;"                                                   \
 210         "mcr p15, 0, r1, c7, c5, 0;"  /* flush ICache */                \
 211         "mcr p15, 0, r1, c8, c5, 0;"  /* flush ITLB only */             \
 212         "nop;" /* next few instructions may be via cache    */          \
 213         "nop;"                                                          \
 214         "nop;"                                                          \
 215         "nop;"                                                          \
 216         "nop;"                                                          \
 217         "nop;"                                                          \
 218         :                                                               \
 219         :                                                               \
 220         : "r1" /* Clobber list */                                       \
 221         );                                                              \
 222 CYG_MACRO_END
 223
 224 // Synchronize the contents of the cache with memory.
 225 // (which includes flushing out pending writes)
 226 #define HAL_ICACHE_SYNC()                                       \
 227 CYG_MACRO_START                                                 \
 228     HAL_DCACHE_SYNC(); /* ensure data gets to RAM */            \
 229     HAL_ICACHE_INVALIDATE_ALL(); /* forget all we know */       \
 230 CYG_MACRO_END
 231
 232 #endif // ifndef CYGONCE_HAL_CACHE_H
 233 // End of hal_cache.h