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1 /*================================================================= |
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2 // |
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3 // kcache1.c |
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4 // |
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5 // Cache timing test |
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6 // |
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7 //========================================================================== |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Cygnus eCos Public License |
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12 // Version 1.0 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //========================================================================== |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): dsm |
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33 // Contributors: dsm, nickg |
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34 // Date: 1998-06-18 |
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35 //####DESCRIPTIONEND#### |
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36 */ |
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37 |
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38 #include <cyg/kernel/kapi.h> |
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39 |
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40 #include <cyg/infra/testcase.h> |
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41 |
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42 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK |
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43 #ifdef CYGFUN_KERNEL_API_C |
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44 |
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45 #include <cyg/infra/diag.h> |
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46 #include <cyg/hal/hal_cache.h> |
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47 |
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48 // ------------------------------------------------------------------------- |
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49 // If the HAL does not supply this, we supply our own version |
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50 |
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51 #ifndef HAL_DCACHE_PURGE_ALL |
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52 |
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53 static cyg_uint8 dca[HAL_DCACHE_SIZE + HAL_DCACHE_LINE_SIZE*2]; |
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54 |
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55 #define HAL_DCACHE_PURGE_ALL() \ |
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56 CYG_MACRO_START \ |
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57 volatile cyg_uint8 *addr = &dca[HAL_DCACHE_LINE_SIZE]; \ |
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58 volatile cyg_uint8 tmp = 0; \ |
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59 int i; \ |
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60 for( i = 0; i < HAL_DCACHE_SIZE; i += HAL_DCACHE_LINE_SIZE ) \ |
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61 { \ |
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62 tmp = addr[i]; \ |
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63 } \ |
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64 CYG_MACRO_END |
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65 |
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66 #endif |
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67 |
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68 // ------------------------------------------------------------------------- |
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69 |
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70 #define NTHREADS 1 |
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71 #define STACKSIZE 4096 |
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72 |
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73 static cyg_handle_t thread[NTHREADS]; |
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74 |
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75 static cyg_thread thread_obj[NTHREADS]; |
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76 static char stack[NTHREADS][STACKSIZE]; |
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77 |
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78 #define MAXSIZE 1<<18 |
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79 |
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80 volatile char m[MAXSIZE]; |
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81 |
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82 // ------------------------------------------------------------------------- |
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83 |
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84 static void time0(register cyg_uint32 stride) |
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85 { |
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86 register cyg_uint32 j,k; |
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87 cyg_tick_count_t count0, count1; |
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88 cyg_ucount32 t; |
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89 register char c; |
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90 |
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91 count0 = cyg_current_time(); |
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92 |
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93 for(k=0; k<4000;k++) { |
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94 for(j=0; j<(HAL_DCACHE_SIZE/HAL_DCACHE_LINE_SIZE); j++) { |
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95 c=m[stride*j]; |
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96 } |
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97 } |
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98 |
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99 count1 = cyg_current_time(); |
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100 t = count1 - count0; |
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101 diag_printf("stride=%d, time=%d\n", stride, t); |
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102 } |
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103 |
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104 // ------------------------------------------------------------------------- |
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105 |
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106 void time1(void) |
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107 { |
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108 cyg_uint32 i; |
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109 |
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110 for(i=1; i<65; i+=i) { |
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111 time0(i); |
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112 } |
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113 } |
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114 |
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115 // ------------------------------------------------------------------------- |
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116 // This test could be improved by counting number of passes possible |
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117 // in a given number of ticks. |
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118 |
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119 static void entry0( cyg_addrword_t data ) |
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120 { |
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121 HAL_DCACHE_PURGE_ALL(); |
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122 HAL_ICACHE_INVALIDATE_ALL(); |
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123 HAL_DCACHE_INVALIDATE_ALL(); |
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124 HAL_ICACHE_DISABLE(); |
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125 HAL_DCACHE_DISABLE(); |
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126 CYG_TEST_INFO("Dcache off Icache off"); |
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127 time1(); |
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128 |
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129 HAL_DCACHE_PURGE_ALL(); |
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130 HAL_ICACHE_INVALIDATE_ALL(); |
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131 HAL_DCACHE_INVALIDATE_ALL(); |
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132 HAL_ICACHE_DISABLE(); |
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133 HAL_DCACHE_ENABLE(); |
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134 CYG_TEST_INFO("Dcache on Icache off"); |
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135 time1(); |
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136 |
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137 HAL_DCACHE_PURGE_ALL(); |
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138 HAL_ICACHE_INVALIDATE_ALL(); |
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139 HAL_DCACHE_INVALIDATE_ALL(); |
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140 HAL_ICACHE_ENABLE(); |
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141 HAL_DCACHE_DISABLE(); |
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142 CYG_TEST_INFO("Dcache off Icache on"); |
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143 time1(); |
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144 |
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145 HAL_DCACHE_PURGE_ALL(); |
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146 HAL_ICACHE_INVALIDATE_ALL(); |
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147 HAL_DCACHE_INVALIDATE_ALL(); |
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148 HAL_ICACHE_ENABLE(); |
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149 HAL_DCACHE_ENABLE(); |
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150 CYG_TEST_INFO("Dcache on Icache on"); |
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151 time1(); |
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152 |
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153 |
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154 HAL_DCACHE_PURGE_ALL(); |
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155 HAL_ICACHE_INVALIDATE_ALL(); |
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156 HAL_DCACHE_INVALIDATE_ALL(); |
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157 HAL_ICACHE_DISABLE(); |
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158 HAL_DCACHE_DISABLE(); |
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159 CYG_TEST_INFO("Dcache off Icache off"); |
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160 time1(); |
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161 |
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162 |
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163 CYG_TEST_PASS_FINISH("End of test"); |
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164 } |
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165 |
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166 // ------------------------------------------------------------------------- |
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167 |
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168 void kcache2_main( void ) |
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169 { |
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170 CYG_TEST_INIT(); |
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171 |
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172 cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kcache1", |
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173 (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]); |
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174 cyg_thread_resume(thread[0]); |
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175 |
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176 cyg_scheduler_start(); |
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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 externC void |
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182 cyg_start( void ) |
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183 { |
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184 kcache2_main(); |
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185 } |
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186 |
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187 // ------------------------------------------------------------------------- |
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188 |
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189 #else // def CYGFUN_KERNEL_API_C |
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190 #define N_A_MSG "Kernel C API layer disabled" |
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191 #endif // def CYGFUN_KERNEL_API_C |
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192 #else // def CYGVAR_KERNEL_COUNTERS_CLOCK |
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193 #define N_A_MSG "Kernel real-time clock disabled" |
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194 #endif // def CYGVAR_KERNEL_COUNTERS_CLOCK |
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195 |
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196 #ifdef N_A_MSG |
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197 externC void |
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198 cyg_start( void ) |
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199 { |
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200 CYG_TEST_INIT(); |
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201 CYG_TEST_PASS_FINISH("N/A: " N_A_MSG); |
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202 } |
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203 #endif // N_A_MSG |
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204 |
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205 // ------------------------------------------------------------------------- |
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206 /* EOF kcache1.c */ |
