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1 /* |
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2 * LIBOIL - Library of Optimized Inner Loops |
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3 * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org> |
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4 * All rights reserved. |
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5 * |
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6 * Redistribution and use in source and binary forms, with or without |
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7 * modification, are permitted provided that the following conditions |
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8 * are met: |
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9 * 1. Redistributions of source code must retain the above copyright |
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10 * notice, this list of conditions and the following disclaimer. |
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11 * 2. Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * |
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15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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25 * POSSIBILITY OF SUCH DAMAGE. |
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26 */ |
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27 |
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28 #ifdef HAVE_CONFIG_H |
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29 #include "config.h" |
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30 #endif |
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31 #include <liboil/liboilfunction.h> |
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32 #include <liboil/liboildebug.h> |
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33 #include <liboil/liboilcpu.h> |
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34 #include <liboil/liboilfault.h> |
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35 #include <liboil/liboilutils.h> |
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36 |
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37 #include <unistd.h> |
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38 #include <fcntl.h> |
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39 #include <stdlib.h> |
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40 #include <string.h> |
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41 #include <stdio.h> |
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42 #include <setjmp.h> |
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43 #include <signal.h> |
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44 #include <sys/time.h> |
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45 #include <time.h> |
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46 |
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47 /***** arm *****/ |
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48 |
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49 //#ifdef __arm__ |
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50 #if 0 |
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51 static unsigned long |
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52 oil_profile_stamp_xscale(void) |
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53 { |
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54 unsigned int ts; |
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55 __asm__ __volatile__ ( |
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56 " mrc p14, 0, %0, c1, c0, 0 \n" |
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57 : "=r" (ts)); |
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58 return ts; |
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59 } |
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60 #endif |
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61 |
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62 static void |
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63 oil_cpu_arm_getflags_cpuinfo (char *cpuinfo) |
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64 { |
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65 char *cpuinfo_flags; |
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66 char **flags; |
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67 char **f; |
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68 |
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69 cpuinfo_flags = get_cpuinfo_line(cpuinfo, "Features"); |
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70 if (cpuinfo_flags == NULL) { |
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71 free (cpuinfo); |
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72 return; |
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73 } |
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74 |
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75 flags = strsplit(cpuinfo_flags); |
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76 for (f = flags; *f; f++) { |
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77 if (strcmp (*f, "edsp") == 0) { |
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78 OIL_DEBUG ("cpu feature %s", *f); |
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79 oil_cpu_flags |= OIL_IMPL_FLAG_EDSP; |
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80 } |
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81 if (strcmp (*f, "vfp") == 0) { |
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82 OIL_DEBUG ("cpu feature %s", *f); |
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83 oil_cpu_flags |= OIL_IMPL_FLAG_VFP; |
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84 } |
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85 |
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86 free (*f); |
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87 } |
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88 free (flags); |
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89 free (cpuinfo_flags); |
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90 } |
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91 |
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92 static char * |
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93 get_proc_cpuinfo (void) |
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94 { |
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95 char *cpuinfo; |
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96 int fd; |
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97 int n; |
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98 |
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99 cpuinfo = malloc(4096); |
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100 if (cpuinfo == NULL) return NULL; |
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101 |
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102 fd = open("/proc/cpuinfo", O_RDONLY); |
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103 if (fd < 0) { |
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104 free (cpuinfo); |
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105 return NULL; |
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106 } |
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107 |
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108 n = read(fd, cpuinfo, 4095); |
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109 if (n < 0) { |
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110 free (cpuinfo); |
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111 close (fd); |
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112 return NULL; |
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113 } |
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114 cpuinfo[n] = 0; |
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115 |
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116 close (fd); |
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117 |
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118 return cpuinfo; |
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119 } |
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120 #ifdef __SYMBIAN32__ |
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121 EXPORT_C |
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122 #endif |
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123 void |
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124 oil_cpu_detect_arch(void) |
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125 { |
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126 #ifdef __linux__ |
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127 int arm_implementer = 0; |
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128 int arm_arch; |
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129 char *cpuinfo; |
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130 char *s; |
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131 |
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132 cpuinfo = get_proc_cpuinfo(); |
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133 if (cpuinfo == NULL) return; |
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134 |
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135 s = get_cpuinfo_line(cpuinfo, "CPU implementer"); |
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136 if (s) { |
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137 arm_implementer = strtoul (s, NULL, 0); |
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138 free(s); |
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139 } |
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140 |
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141 switch(arm_implementer) { |
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142 case 0x69: /* Intel */ |
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143 case 0x41: /* ARM */ |
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144 /* ARM chips are known to not have timestamping available from |
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145 * user space */ |
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146 break; |
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147 default: |
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148 break; |
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149 } |
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150 |
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151 s = get_cpuinfo_line(cpuinfo, "CPU architecture"); |
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152 if (s) { |
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153 arm_arch = strtoul (s, NULL, 0); |
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154 if (arm_arch >= 6) |
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155 oil_cpu_flags |= OIL_IMPL_FLAG_ARM6; |
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156 free(s); |
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157 } |
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158 |
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159 oil_cpu_arm_getflags_cpuinfo (cpuinfo); |
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160 free (cpuinfo); |
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161 #endif |
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162 } |
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163 //#endif |
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164 |
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165 |