1 | /* |
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2 | * UNIX Simulator Dependent Source |
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3 | * |
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4 | * |
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5 | * To anyone who acknowledges that this file is provided "AS IS" |
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6 | * without any express or implied warranty: |
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7 | * permission to use, copy, modify, and distribute this file |
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8 | * for any purpose is hereby granted without fee, provided that |
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9 | * the above copyright notice and this notice appears in all |
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10 | * copies, and that the name of Division Incorporated not be |
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11 | * used in advertising or publicity pertaining to distribution |
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12 | * of the software without specific, written prior permission. |
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13 | * Division Incorporated makes no representations about the |
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14 | * suitability of this software for any purpose. |
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15 | * |
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16 | * $Id$ |
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17 | */ |
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18 | |
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19 | #include <rtems/system.h> |
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20 | #include <rtems/score/isr.h> |
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21 | #include <rtems/score/interr.h> |
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22 | |
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23 | #if defined(solaris2) |
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24 | /* |
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25 | #undef _POSIX_C_SOURCE |
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26 | #define _POSIX_C_SOURCE 3 |
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27 | #undef __STRICT_ANSI__ |
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28 | #define __STRICT_ANSI__ |
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29 | */ |
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30 | #define __EXTENSIONS__ |
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31 | #endif |
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32 | |
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33 | #if defined(linux) |
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34 | #define MALLOC_0_RETURNS_NULL |
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35 | #endif |
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36 | |
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37 | #include <stdio.h> |
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38 | #include <stdlib.h> |
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39 | #include <setjmp.h> |
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40 | #include <signal.h> |
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41 | #include <time.h> |
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42 | #include <sys/time.h> |
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43 | #include <sys/types.h> |
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44 | #include <errno.h> |
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45 | #include <unistd.h> |
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46 | #include <sys/ipc.h> |
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47 | #include <sys/shm.h> |
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48 | #include <sys/sem.h> |
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49 | |
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50 | #ifndef SA_RESTART |
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51 | #define SA_RESTART 0 |
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52 | #endif |
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53 | |
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54 | typedef struct { |
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55 | jmp_buf regs; |
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56 | sigset_t isr_level; |
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57 | } Context_Control_overlay; |
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58 | |
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59 | void _CPU_Signal_initialize(void); |
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60 | void _CPU_Stray_signal(int); |
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61 | void _CPU_ISR_Handler(int); |
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62 | |
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63 | sigset_t _CPU_Signal_mask; |
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64 | Context_Control _CPU_Context_Default_with_ISRs_enabled; |
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65 | Context_Control _CPU_Context_Default_with_ISRs_disabled; |
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66 | |
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67 | /* |
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68 | * Which cpu are we? Used by libcpu and libbsp. |
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69 | */ |
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70 | |
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71 | int cpu_number; |
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72 | |
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73 | /*PAGE |
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74 | * |
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75 | * _CPU_ISR_From_CPU_Init |
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76 | */ |
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77 | |
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78 | sigset_t posix_empty_mask; |
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79 | |
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80 | void _CPU_ISR_From_CPU_Init() |
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81 | { |
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82 | unsigned32 i; |
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83 | proc_ptr old_handler; |
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84 | |
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85 | /* |
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86 | * Generate an empty mask to be used by disable_support |
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87 | */ |
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88 | |
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89 | sigemptyset(&posix_empty_mask); |
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90 | |
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91 | /* |
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92 | * Block all the signals except SIGTRAP for the debugger |
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93 | * and SIGABRT for fatal errors. |
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94 | */ |
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95 | |
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96 | (void) sigfillset(&_CPU_Signal_mask); |
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97 | (void) sigdelset(&_CPU_Signal_mask, SIGTRAP); |
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98 | (void) sigdelset(&_CPU_Signal_mask, SIGABRT); |
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99 | (void) sigdelset(&_CPU_Signal_mask, SIGIOT); |
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100 | (void) sigdelset(&_CPU_Signal_mask, SIGCONT); |
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101 | |
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102 | _CPU_ISR_Enable(1); |
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103 | |
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104 | /* |
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105 | * Set the handler for all signals to be signal_handler |
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106 | * which will then vector out to the correct handler |
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107 | * for whichever signal actually happened. Initially |
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108 | * set the vectors to the stray signal handler. |
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109 | */ |
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110 | |
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111 | for (i = 0; i < CPU_INTERRUPT_NUMBER_OF_VECTORS; i++) |
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112 | (void)_CPU_ISR_install_vector(i, _CPU_Stray_signal, &old_handler); |
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113 | |
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114 | _CPU_Signal_initialize(); |
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115 | } |
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116 | |
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117 | void _CPU_Signal_initialize( void ) |
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118 | { |
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119 | struct sigaction act; |
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120 | sigset_t mask; |
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121 | |
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122 | /* mark them all active except for TraceTrap and Abort */ |
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123 | |
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124 | sigfillset(&mask); |
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125 | sigdelset(&mask, SIGTRAP); |
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126 | sigdelset(&mask, SIGABRT); |
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127 | sigdelset(&mask, SIGIOT); |
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128 | sigdelset(&mask, SIGCONT); |
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129 | sigprocmask(SIG_UNBLOCK, &mask, 0); |
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130 | |
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131 | act.sa_handler = _CPU_ISR_Handler; |
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132 | act.sa_mask = mask; |
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133 | act.sa_flags = SA_RESTART; |
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134 | |
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135 | sigaction(SIGHUP, &act, 0); |
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136 | sigaction(SIGINT, &act, 0); |
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137 | sigaction(SIGQUIT, &act, 0); |
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138 | sigaction(SIGILL, &act, 0); |
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139 | #ifdef SIGEMT |
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140 | sigaction(SIGEMT, &act, 0); |
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141 | #endif |
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142 | sigaction(SIGFPE, &act, 0); |
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143 | sigaction(SIGKILL, &act, 0); |
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144 | sigaction(SIGBUS, &act, 0); |
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145 | sigaction(SIGSEGV, &act, 0); |
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146 | #ifdef SIGSYS |
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147 | sigaction(SIGSYS, &act, 0); |
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148 | #endif |
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149 | sigaction(SIGPIPE, &act, 0); |
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150 | sigaction(SIGALRM, &act, 0); |
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151 | sigaction(SIGTERM, &act, 0); |
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152 | sigaction(SIGUSR1, &act, 0); |
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153 | sigaction(SIGUSR2, &act, 0); |
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154 | sigaction(SIGCHLD, &act, 0); |
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155 | sigaction(SIGCLD, &act, 0); |
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156 | sigaction(SIGPWR, &act, 0); |
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157 | sigaction(SIGVTALRM, &act, 0); |
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158 | sigaction(SIGPROF, &act, 0); |
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159 | sigaction(SIGIO, &act, 0); |
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160 | sigaction(SIGWINCH, &act, 0); |
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161 | sigaction(SIGSTOP, &act, 0); |
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162 | sigaction(SIGTTIN, &act, 0); |
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163 | sigaction(SIGTTOU, &act, 0); |
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164 | sigaction(SIGURG, &act, 0); |
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165 | #ifdef SIGLOST |
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166 | sigaction(SIGLOST, &act, 0); |
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167 | #endif |
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168 | |
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169 | } |
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170 | |
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171 | /*PAGE |
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172 | * |
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173 | * _CPU_Context_From_CPU_Init |
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174 | */ |
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175 | |
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176 | void _CPU_Context_From_CPU_Init() |
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177 | { |
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178 | |
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179 | #if defined(hppa1_1) && defined(RTEMS_UNIXLIB_SETJMP) |
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180 | /* |
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181 | * HACK - set the _SYSTEM_ID to 0x20c so that setjmp/longjmp |
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182 | * will handle the full 32 floating point registers. |
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183 | * |
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184 | * NOTE: Is this a bug in HPUX9? |
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185 | */ |
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186 | |
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187 | { |
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188 | extern unsigned32 _SYSTEM_ID; |
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189 | |
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190 | _SYSTEM_ID = 0x20c; |
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191 | } |
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192 | #endif |
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193 | |
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194 | /* |
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195 | * get default values to use in _CPU_Context_Initialize() |
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196 | */ |
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197 | |
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198 | _CPU_ISR_Set_level( 0 ); |
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199 | _CPU_Context_switch( |
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200 | &_CPU_Context_Default_with_ISRs_enabled, |
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201 | &_CPU_Context_Default_with_ISRs_enabled |
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202 | ); |
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203 | |
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204 | _CPU_ISR_Set_level( 1 ); |
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205 | _CPU_Context_switch( |
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206 | &_CPU_Context_Default_with_ISRs_disabled, |
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207 | &_CPU_Context_Default_with_ISRs_disabled |
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208 | ); |
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209 | } |
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210 | |
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211 | /*PAGE |
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212 | * |
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213 | * _CPU_ISR_Get_level |
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214 | */ |
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215 | |
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216 | sigset_t GET_old_mask; |
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217 | |
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218 | unsigned32 _CPU_ISR_Get_level( void ) |
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219 | { |
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220 | /* sigset_t old_mask; */ |
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221 | unsigned32 old_level; |
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222 | |
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223 | sigprocmask(0, 0, &GET_old_mask); |
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224 | |
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225 | if (memcmp((void *)&posix_empty_mask, (void *)&GET_old_mask, sizeof(sigset_t))) |
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226 | old_level = 1; |
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227 | else |
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228 | old_level = 0; |
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229 | |
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230 | return old_level; |
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231 | } |
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232 | |
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233 | /* _CPU_Initialize |
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234 | * |
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235 | * This routine performs processor dependent initialization. |
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236 | * |
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237 | * INPUT PARAMETERS: |
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238 | * cpu_table - CPU table to initialize |
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239 | * thread_dispatch - address of disptaching routine |
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240 | */ |
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241 | |
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242 | |
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243 | void _CPU_Initialize( |
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244 | rtems_cpu_table *cpu_table, |
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245 | void (*thread_dispatch) /* ignored on this CPU */ |
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246 | ) |
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247 | { |
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248 | /* |
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249 | * The thread_dispatch argument is the address of the entry point |
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250 | * for the routine called at the end of an ISR once it has been |
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251 | * decided a context switch is necessary. On some compilation |
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252 | * systems it is difficult to call a high-level language routine |
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253 | * from assembly. This allows us to trick these systems. |
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254 | * |
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255 | * If you encounter this problem save the entry point in a CPU |
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256 | * dependent variable. |
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257 | */ |
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258 | |
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259 | _CPU_Thread_dispatch_pointer = thread_dispatch; |
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260 | |
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261 | /* |
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262 | * XXX; If there is not an easy way to initialize the FP context |
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263 | * during Context_Initialize, then it is usually easier to |
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264 | * save an "uninitialized" FP context here and copy it to |
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265 | * the task's during Context_Initialize. |
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266 | */ |
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267 | |
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268 | /* XXX: FP context initialization support */ |
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269 | |
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270 | _CPU_Table = *cpu_table; |
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271 | |
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272 | _CPU_ISR_From_CPU_Init(); |
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273 | |
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274 | _CPU_Context_From_CPU_Init(); |
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275 | |
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276 | } |
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277 | |
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278 | /*PAGE |
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279 | * |
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280 | * _CPU_ISR_install_raw_handler |
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281 | */ |
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282 | |
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283 | void _CPU_ISR_install_raw_handler( |
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284 | unsigned32 vector, |
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285 | proc_ptr new_handler, |
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286 | proc_ptr *old_handler |
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287 | ) |
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288 | { |
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289 | _CPU_Fatal_halt( 0xdeaddead ); |
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290 | } |
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291 | |
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292 | /*PAGE |
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293 | * |
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294 | * _CPU_ISR_install_vector |
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295 | * |
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296 | * This kernel routine installs the RTEMS handler for the |
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297 | * specified vector. |
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298 | * |
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299 | * Input parameters: |
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300 | * vector - interrupt vector number |
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301 | * old_handler - former ISR for this vector number |
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302 | * new_handler - replacement ISR for this vector number |
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303 | * |
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304 | * Output parameters: NONE |
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305 | * |
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306 | */ |
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307 | |
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308 | |
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309 | void _CPU_ISR_install_vector( |
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310 | unsigned32 vector, |
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311 | proc_ptr new_handler, |
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312 | proc_ptr *old_handler |
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313 | ) |
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314 | { |
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315 | *old_handler = _ISR_Vector_table[ vector ]; |
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316 | |
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317 | /* |
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318 | * If the interrupt vector table is a table of pointer to isr entry |
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319 | * points, then we need to install the appropriate RTEMS interrupt |
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320 | * handler for this vector number. |
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321 | */ |
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322 | |
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323 | /* |
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324 | * We put the actual user ISR address in '_ISR_vector_table'. This will |
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325 | * be used by the _CPU_ISR_Handler so the user gets control. |
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326 | */ |
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327 | |
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328 | _ISR_Vector_table[ vector ] = new_handler; |
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329 | } |
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330 | |
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331 | /*PAGE |
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332 | * |
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333 | * _CPU_Install_interrupt_stack |
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334 | */ |
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335 | |
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336 | void _CPU_Install_interrupt_stack( void ) |
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337 | { |
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338 | } |
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339 | |
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340 | /*PAGE |
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341 | * |
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342 | * _CPU_Internal_threads_Idle_thread_body |
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343 | * |
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344 | * NOTES: |
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345 | * |
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346 | * 1. This is the same as the regular CPU independent algorithm. |
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347 | * |
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348 | * 2. If you implement this using a "halt", "idle", or "shutdown" |
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349 | * instruction, then don't forget to put it in an infinite loop. |
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350 | * |
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351 | * 3. Be warned. Some processors with onboard DMA have been known |
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352 | * to stop the DMA if the CPU were put in IDLE mode. This might |
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353 | * also be a problem with other on-chip peripherals. So use this |
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354 | * hook with caution. |
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355 | */ |
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356 | |
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357 | void _CPU_Internal_threads_Idle_thread_body( void ) |
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358 | { |
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359 | while (1) |
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360 | pause(); |
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361 | } |
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362 | |
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363 | /*PAGE |
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364 | * |
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365 | * _CPU_Context_Initialize |
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366 | */ |
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367 | |
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368 | void _CPU_Context_Initialize( |
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369 | Context_Control *_the_context, |
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370 | unsigned32 *_stack_base, |
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371 | unsigned32 _size, |
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372 | unsigned32 _new_level, |
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373 | void *_entry_point |
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374 | ) |
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375 | { |
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376 | void *source; |
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377 | unsigned32 *addr; |
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378 | unsigned32 jmp_addr; |
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379 | unsigned32 _stack_low; /* lowest "stack aligned" address */ |
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380 | unsigned32 _stack_high; /* highest "stack aligned" address */ |
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381 | unsigned32 _the_size; |
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382 | |
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383 | jmp_addr = (unsigned32) _entry_point; |
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384 | |
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385 | /* |
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386 | * On CPUs with stacks which grow down, we build the stack |
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387 | * based on the _stack_high address. On CPUs with stacks which |
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388 | * grow up, we build the stack based on the _stack_low address. |
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389 | */ |
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390 | |
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391 | _stack_low = ((unsigned32)(_stack_base) + CPU_STACK_ALIGNMENT); |
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392 | _stack_low &= ~(CPU_STACK_ALIGNMENT - 1); |
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393 | |
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394 | _stack_high = ((unsigned32)(_stack_base) + _size); |
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395 | _stack_high &= ~(CPU_STACK_ALIGNMENT - 1); |
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396 | |
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397 | _the_size = _size & ~(CPU_STACK_ALIGNMENT - 1); |
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398 | |
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399 | /* |
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400 | * Slam our jmp_buf template into the context we are creating |
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401 | */ |
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402 | |
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403 | if ( _new_level == 0 ) |
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404 | source = &_CPU_Context_Default_with_ISRs_enabled; |
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405 | else |
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406 | source = &_CPU_Context_Default_with_ISRs_disabled; |
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407 | |
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408 | memcpy(_the_context, source, sizeof(Context_Control) ); /* sizeof(jmp_buf)); */ |
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409 | |
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410 | addr = (unsigned32 *)_the_context; |
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411 | |
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412 | #if defined(hppa1_1) |
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413 | *(addr + RP_OFF) = jmp_addr; |
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414 | *(addr + SP_OFF) = (unsigned32)(_stack_low + CPU_FRAME_SIZE); |
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415 | |
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416 | /* |
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417 | * See if we are using shared libraries by checking |
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418 | * bit 30 in 24 off of newp. If bit 30 is set then |
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419 | * we are using shared libraries and the jump address |
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420 | * is at what 24 off of newp points to so shove that |
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421 | * into 24 off of newp instead. |
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422 | */ |
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423 | |
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424 | if (jmp_addr & 0x40000000) { |
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425 | jmp_addr &= 0xfffffffc; |
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426 | *(addr + RP_OFF) = (unsigned32)*(unsigned32 *)jmp_addr; |
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427 | } |
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428 | #elif defined(sparc) |
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429 | |
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430 | /* |
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431 | * See /usr/include/sys/stack.h in Solaris 2.3 for a nice |
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432 | * diagram of the stack. |
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433 | */ |
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434 | |
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435 | asm ("ta 0x03"); /* flush registers */ |
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436 | |
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437 | *(addr + RP_OFF) = jmp_addr + ADDR_ADJ_OFFSET; |
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438 | *(addr + SP_OFF) = (unsigned32)(_stack_high - CPU_FRAME_SIZE); |
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439 | *(addr + FP_OFF) = (unsigned32)(_stack_high); |
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440 | |
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441 | #elif defined(i386) |
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442 | |
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443 | /* |
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444 | * This information was gathered by disassembling setjmp(). |
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445 | */ |
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446 | |
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447 | { |
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448 | unsigned32 stack_ptr; |
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449 | |
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450 | stack_ptr = _stack_high - CPU_FRAME_SIZE; |
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451 | |
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452 | *(addr + EBX_OFF) = 0xFEEDFEED; |
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453 | *(addr + ESI_OFF) = 0xDEADDEAD; |
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454 | *(addr + EDI_OFF) = 0xDEAFDEAF; |
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455 | *(addr + EBP_OFF) = stack_ptr; |
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456 | *(addr + ESP_OFF) = stack_ptr; |
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457 | *(addr + RET_OFF) = jmp_addr; |
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458 | |
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459 | addr = (unsigned32 *) stack_ptr; |
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460 | |
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461 | addr[ 0 ] = jmp_addr; |
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462 | addr[ 1 ] = (unsigned32) stack_ptr; |
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463 | addr[ 2 ] = (unsigned32) stack_ptr; |
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464 | } |
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465 | |
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466 | #else |
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467 | #error "UNKNOWN CPU!!!" |
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468 | #endif |
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469 | |
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470 | } |
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471 | |
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472 | /*PAGE |
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473 | * |
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474 | * _CPU_Context_restore |
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475 | */ |
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476 | |
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477 | void _CPU_Context_restore( |
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478 | Context_Control *next |
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479 | ) |
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480 | { |
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481 | Context_Control_overlay *nextp = (Context_Control_overlay *)next; |
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482 | |
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483 | sigprocmask( SIG_SETMASK, &nextp->isr_level, 0 ); |
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484 | longjmp( nextp->regs, 0 ); |
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485 | } |
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486 | |
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487 | /*PAGE |
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488 | * |
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489 | * _CPU_Context_switch |
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490 | */ |
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491 | |
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492 | void _CPU_Context_switch( |
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493 | Context_Control *current, |
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494 | Context_Control *next |
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495 | ) |
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496 | { |
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497 | Context_Control_overlay *currentp = (Context_Control_overlay *)current; |
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498 | Context_Control_overlay *nextp = (Context_Control_overlay *)next; |
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499 | |
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500 | int status; |
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501 | |
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502 | /* |
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503 | * Switch levels in one operation |
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504 | */ |
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505 | |
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506 | status = sigprocmask( SIG_SETMASK, &nextp->isr_level, ¤tp->isr_level ); |
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507 | if ( status ) |
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508 | _Internal_error_Occurred( |
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509 | INTERNAL_ERROR_CORE, |
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510 | TRUE, |
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511 | status |
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512 | ); |
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513 | |
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514 | if (setjmp(currentp->regs) == 0) { /* Save the current context */ |
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515 | longjmp(nextp->regs, 0); /* Switch to the new context */ |
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516 | if ( status ) |
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517 | _Internal_error_Occurred( |
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518 | INTERNAL_ERROR_CORE, |
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519 | TRUE, |
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520 | status |
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521 | ); |
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522 | } |
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523 | |
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524 | } |
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525 | |
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526 | /*PAGE |
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527 | * |
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528 | * _CPU_Save_float_context |
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529 | */ |
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530 | |
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531 | void _CPU_Save_float_context( |
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532 | Context_Control_fp *fp_context |
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533 | ) |
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534 | { |
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535 | } |
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536 | |
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537 | /*PAGE |
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538 | * |
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539 | * _CPU_Restore_float_context |
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540 | */ |
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541 | |
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542 | void _CPU_Restore_float_context( |
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543 | Context_Control_fp *fp_context |
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544 | ) |
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545 | { |
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546 | } |
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547 | |
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548 | /*PAGE |
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549 | * |
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550 | * _CPU_ISR_Disable_support |
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551 | */ |
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552 | |
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553 | unsigned32 _CPU_ISR_Disable_support(void) |
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554 | { |
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555 | int status; |
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556 | sigset_t old_mask; |
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557 | |
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558 | status = sigprocmask(SIG_BLOCK, &_CPU_Signal_mask, &old_mask); |
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559 | if ( status ) |
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560 | _Internal_error_Occurred( |
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561 | INTERNAL_ERROR_CORE, |
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562 | TRUE, |
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563 | status |
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564 | ); |
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565 | |
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566 | if (memcmp((void *)&posix_empty_mask, (void *)&old_mask, sizeof(sigset_t))) |
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567 | return 1; |
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568 | |
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569 | return 0; |
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570 | } |
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571 | |
---|
572 | /*PAGE |
---|
573 | * |
---|
574 | * _CPU_ISR_Enable |
---|
575 | */ |
---|
576 | |
---|
577 | void _CPU_ISR_Enable( |
---|
578 | unsigned32 level |
---|
579 | ) |
---|
580 | { |
---|
581 | int status; |
---|
582 | |
---|
583 | if (level == 0) |
---|
584 | status = sigprocmask(SIG_UNBLOCK, &_CPU_Signal_mask, 0); |
---|
585 | else |
---|
586 | status = sigprocmask(SIG_BLOCK, &_CPU_Signal_mask, 0); |
---|
587 | |
---|
588 | if ( status ) |
---|
589 | _Internal_error_Occurred( |
---|
590 | INTERNAL_ERROR_CORE, |
---|
591 | TRUE, |
---|
592 | status |
---|
593 | ); |
---|
594 | } |
---|
595 | |
---|
596 | /*PAGE |
---|
597 | * |
---|
598 | * _CPU_ISR_Handler |
---|
599 | * |
---|
600 | * External interrupt handler. |
---|
601 | * This is installed as a UNIX signal handler. |
---|
602 | * It vectors out to specific user interrupt handlers. |
---|
603 | */ |
---|
604 | |
---|
605 | void _CPU_ISR_Handler(int vector) |
---|
606 | { |
---|
607 | extern void _Thread_Dispatch(void); |
---|
608 | extern unsigned32 _Thread_Dispatch_disable_level; |
---|
609 | extern boolean _Context_Switch_necessary; |
---|
610 | |
---|
611 | |
---|
612 | if (_ISR_Nest_level++ == 0) { |
---|
613 | /* switch to interrupt stack */ |
---|
614 | } |
---|
615 | |
---|
616 | _Thread_Dispatch_disable_level++; |
---|
617 | |
---|
618 | if (_ISR_Vector_table[vector]) { |
---|
619 | _ISR_Vector_table[vector](vector); |
---|
620 | } else { |
---|
621 | _CPU_Stray_signal(vector); |
---|
622 | } |
---|
623 | |
---|
624 | if (_ISR_Nest_level-- == 0) { |
---|
625 | /* switch back to original stack */ |
---|
626 | } |
---|
627 | |
---|
628 | _Thread_Dispatch_disable_level--; |
---|
629 | |
---|
630 | if (_Thread_Dispatch_disable_level == 0 && |
---|
631 | (_Context_Switch_necessary || _ISR_Signals_to_thread_executing)) { |
---|
632 | _CPU_ISR_Enable(0); |
---|
633 | _Thread_Dispatch(); |
---|
634 | } |
---|
635 | } |
---|
636 | |
---|
637 | /*PAGE |
---|
638 | * |
---|
639 | * _CPU_Stray_signal |
---|
640 | */ |
---|
641 | |
---|
642 | void _CPU_Stray_signal(int sig_num) |
---|
643 | { |
---|
644 | char buffer[ 4 ]; |
---|
645 | |
---|
646 | /* |
---|
647 | * We avoid using the stdio section of the library. |
---|
648 | * The following is generally safe. |
---|
649 | */ |
---|
650 | |
---|
651 | buffer[ 0 ] = (sig_num >> 4) + 0x30; |
---|
652 | buffer[ 1 ] = (sig_num & 0xf) + 0x30; |
---|
653 | buffer[ 2 ] = '\n'; |
---|
654 | |
---|
655 | write( 2, "Stray signal 0x", 12 ); |
---|
656 | write( 2, buffer, 3 ); |
---|
657 | |
---|
658 | /* |
---|
659 | * If it was a "fatal" signal, then exit here |
---|
660 | * If app code has installed a hander for one of these, then |
---|
661 | * we won't call _CPU_Stray_signal, so this is ok. |
---|
662 | */ |
---|
663 | |
---|
664 | switch (sig_num) { |
---|
665 | case SIGINT: |
---|
666 | case SIGHUP: |
---|
667 | case SIGQUIT: |
---|
668 | case SIGILL: |
---|
669 | #ifdef SIGEMT |
---|
670 | case SIGEMT: |
---|
671 | #endif |
---|
672 | case SIGKILL: |
---|
673 | case SIGBUS: |
---|
674 | case SIGSEGV: |
---|
675 | case SIGTERM: |
---|
676 | _CPU_Fatal_error(0x100 + sig_num); |
---|
677 | } |
---|
678 | } |
---|
679 | |
---|
680 | /*PAGE |
---|
681 | * |
---|
682 | * _CPU_Fatal_error |
---|
683 | */ |
---|
684 | |
---|
685 | void _CPU_Fatal_error(unsigned32 error) |
---|
686 | { |
---|
687 | setitimer(ITIMER_REAL, 0, 0); |
---|
688 | |
---|
689 | if ( error ) { |
---|
690 | #ifdef RTEMS_DEBUG |
---|
691 | abort(); |
---|
692 | #endif |
---|
693 | if (getenv("RTEMS_DEBUG")) |
---|
694 | abort(); |
---|
695 | } |
---|
696 | |
---|
697 | _exit(error); |
---|
698 | } |
---|
699 | |
---|
700 | /*PAGE |
---|
701 | * |
---|
702 | * _CPU_ffs |
---|
703 | */ |
---|
704 | |
---|
705 | int _CPU_ffs(unsigned32 value) |
---|
706 | { |
---|
707 | int output; |
---|
708 | extern int ffs( int ); |
---|
709 | |
---|
710 | output = ffs(value); |
---|
711 | output = output - 1; |
---|
712 | |
---|
713 | return output; |
---|
714 | } |
---|
715 | |
---|
716 | |
---|
717 | /* |
---|
718 | * Special Purpose Routines to hide the use of UNIX system calls. |
---|
719 | */ |
---|
720 | |
---|
721 | #if 0 |
---|
722 | /* XXX clock had this set of #define's */ |
---|
723 | |
---|
724 | /* |
---|
725 | * In order to get the types and prototypes used in this file under |
---|
726 | * Solaris 2.3, it is necessary to pull the following magic. |
---|
727 | */ |
---|
728 | |
---|
729 | #if defined(solaris) |
---|
730 | #warning "Ignore the undefining __STDC__ warning" |
---|
731 | #undef __STDC__ |
---|
732 | #define __STDC__ 0 |
---|
733 | #undef _POSIX_C_SOURCE |
---|
734 | #endif |
---|
735 | #endif |
---|
736 | |
---|
737 | int _CPU_Get_clock_vector( void ) |
---|
738 | { |
---|
739 | return SIGALRM; |
---|
740 | } |
---|
741 | |
---|
742 | |
---|
743 | void _CPU_Start_clock( |
---|
744 | int microseconds |
---|
745 | ) |
---|
746 | { |
---|
747 | struct itimerval new; |
---|
748 | |
---|
749 | new.it_value.tv_sec = 0; |
---|
750 | new.it_value.tv_usec = microseconds; |
---|
751 | new.it_interval.tv_sec = 0; |
---|
752 | new.it_interval.tv_usec = microseconds; |
---|
753 | |
---|
754 | setitimer(ITIMER_REAL, &new, 0); |
---|
755 | } |
---|
756 | |
---|
757 | void _CPU_Stop_clock( void ) |
---|
758 | { |
---|
759 | struct itimerval new; |
---|
760 | struct sigaction act; |
---|
761 | |
---|
762 | /* |
---|
763 | * Set the SIGALRM signal to ignore any last |
---|
764 | * signals that might come in while we are |
---|
765 | * disarming the timer and removing the interrupt |
---|
766 | * vector. |
---|
767 | */ |
---|
768 | |
---|
769 | act.sa_handler = SIG_IGN; |
---|
770 | |
---|
771 | sigaction(SIGALRM, &act, 0); |
---|
772 | |
---|
773 | new.it_value.tv_sec = 0; |
---|
774 | new.it_value.tv_usec = 0; |
---|
775 | |
---|
776 | setitimer(ITIMER_REAL, &new, 0); |
---|
777 | } |
---|
778 | |
---|
779 | int _CPU_SHM_Semid; |
---|
780 | extern void fix_syscall_errno( void ); |
---|
781 | |
---|
782 | void _CPU_SHM_Init( |
---|
783 | unsigned32 maximum_nodes, |
---|
784 | boolean is_master_node, |
---|
785 | void **shm_address, |
---|
786 | unsigned32 *shm_length |
---|
787 | ) |
---|
788 | { |
---|
789 | int i; |
---|
790 | int shmid; |
---|
791 | char *shm_addr; |
---|
792 | key_t shm_key; |
---|
793 | key_t sem_key; |
---|
794 | int status; |
---|
795 | int shm_size; |
---|
796 | |
---|
797 | if (getenv("RTEMS_SHM_KEY")) |
---|
798 | shm_key = strtol(getenv("RTEMS_SHM_KEY"), 0, 0); |
---|
799 | else |
---|
800 | #ifdef RTEMS_SHM_KEY |
---|
801 | shm_key = RTEMS_SHM_KEY; |
---|
802 | #else |
---|
803 | shm_key = 0xa000; |
---|
804 | #endif |
---|
805 | |
---|
806 | if (getenv("RTEMS_SHM_SIZE")) |
---|
807 | shm_size = strtol(getenv("RTEMS_SHM_SIZE"), 0, 0); |
---|
808 | else |
---|
809 | #ifdef RTEMS_SHM_SIZE |
---|
810 | shm_size = RTEMS_SHM_SIZE; |
---|
811 | #else |
---|
812 | shm_size = 64 * 1024; |
---|
813 | #endif |
---|
814 | |
---|
815 | if (getenv("RTEMS_SHM_SEMAPHORE_KEY")) |
---|
816 | sem_key = strtol(getenv("RTEMS_SHM_SEMAPHORE_KEY"), 0, 0); |
---|
817 | else |
---|
818 | #ifdef RTEMS_SHM_SEMAPHORE_KEY |
---|
819 | sem_key = RTEMS_SHM_SEMAPHORE_KEY; |
---|
820 | #else |
---|
821 | sem_key = 0xa001; |
---|
822 | #endif |
---|
823 | |
---|
824 | shmid = shmget(shm_key, shm_size, IPC_CREAT | 0660); |
---|
825 | if ( shmid == -1 ) { |
---|
826 | fix_syscall_errno(); /* in case of newlib */ |
---|
827 | perror( "shmget" ); |
---|
828 | _CPU_Fatal_halt( 0xdead0001 ); |
---|
829 | } |
---|
830 | |
---|
831 | shm_addr = shmat(shmid, (char *)0, SHM_RND); |
---|
832 | if ( shm_addr == (void *)-1 ) { |
---|
833 | fix_syscall_errno(); /* in case of newlib */ |
---|
834 | perror( "shmat" ); |
---|
835 | _CPU_Fatal_halt( 0xdead0002 ); |
---|
836 | } |
---|
837 | |
---|
838 | _CPU_SHM_Semid = semget(sem_key, maximum_nodes + 1, IPC_CREAT | 0660); |
---|
839 | if ( _CPU_SHM_Semid == -1 ) { |
---|
840 | fix_syscall_errno(); /* in case of newlib */ |
---|
841 | perror( "semget" ); |
---|
842 | _CPU_Fatal_halt( 0xdead0003 ); |
---|
843 | } |
---|
844 | |
---|
845 | if ( is_master_node ) { |
---|
846 | for ( i=0 ; i <= maximum_nodes ; i++ ) { |
---|
847 | #if defined(solaris2) |
---|
848 | union semun { |
---|
849 | int val; |
---|
850 | struct semid_ds *buf; |
---|
851 | ushort *array; |
---|
852 | } help; |
---|
853 | |
---|
854 | help.val = 1; |
---|
855 | status = semctl( _CPU_SHM_Semid, i, SETVAL, help ); |
---|
856 | #endif |
---|
857 | #if defined(hpux) |
---|
858 | status = semctl( _CPU_SHM_Semid, i, SETVAL, 1 ); |
---|
859 | #endif |
---|
860 | |
---|
861 | fix_syscall_errno(); /* in case of newlib */ |
---|
862 | if ( status == -1 ) { |
---|
863 | _CPU_Fatal_halt( 0xdead0004 ); |
---|
864 | } |
---|
865 | } |
---|
866 | } |
---|
867 | |
---|
868 | *shm_address = shm_addr; |
---|
869 | *shm_length = shm_size; |
---|
870 | |
---|
871 | } |
---|
872 | |
---|
873 | int _CPU_Get_pid( void ) |
---|
874 | { |
---|
875 | return getpid(); |
---|
876 | } |
---|
877 | |
---|
878 | /* |
---|
879 | * Define this to use signals for MPCI shared memory driver. |
---|
880 | * If undefined, the shared memory driver will poll from the |
---|
881 | * clock interrupt. |
---|
882 | * Ref: ../shmsupp/getcfg.c |
---|
883 | * |
---|
884 | * BEWARE:: many UN*X kernels and debuggers become severely confused when |
---|
885 | * debugging programs which use signals. The problem is *much* |
---|
886 | * worse when using multiple signals, since ptrace(2) tends to |
---|
887 | * drop all signals except 1 in the case of multiples. |
---|
888 | * On hpux9, this problem was so bad, we couldn't use interrupts |
---|
889 | * with the shared memory driver if we ever hoped to debug |
---|
890 | * RTEMS programs. |
---|
891 | * Maybe systems that use /proc don't have this problem... |
---|
892 | */ |
---|
893 | |
---|
894 | |
---|
895 | int _CPU_SHM_Get_vector( void ) |
---|
896 | { |
---|
897 | #ifdef CPU_USE_SHM_INTERRUPTS |
---|
898 | return SIGUSR1; |
---|
899 | #else |
---|
900 | return 0; |
---|
901 | #endif |
---|
902 | } |
---|
903 | |
---|
904 | void _CPU_SHM_Send_interrupt( |
---|
905 | int pid, |
---|
906 | int vector |
---|
907 | ) |
---|
908 | { |
---|
909 | kill((pid_t) pid, vector); |
---|
910 | } |
---|
911 | |
---|
912 | void _CPU_SHM_Lock( |
---|
913 | int semaphore |
---|
914 | ) |
---|
915 | { |
---|
916 | struct sembuf sb; |
---|
917 | int status; |
---|
918 | |
---|
919 | sb.sem_num = semaphore; |
---|
920 | sb.sem_op = -1; |
---|
921 | sb.sem_flg = 0; |
---|
922 | |
---|
923 | while (1) { |
---|
924 | status = semop(_CPU_SHM_Semid, &sb, 1); |
---|
925 | if ( status >= 0 ) |
---|
926 | break; |
---|
927 | if ( status == -1 ) { |
---|
928 | fix_syscall_errno(); /* in case of newlib */ |
---|
929 | if (errno == EINTR) |
---|
930 | continue; |
---|
931 | perror("shm lock"); |
---|
932 | _CPU_Fatal_halt( 0xdead0005 ); |
---|
933 | } |
---|
934 | } |
---|
935 | |
---|
936 | } |
---|
937 | |
---|
938 | void _CPU_SHM_Unlock( |
---|
939 | int semaphore |
---|
940 | ) |
---|
941 | { |
---|
942 | struct sembuf sb; |
---|
943 | int status; |
---|
944 | |
---|
945 | sb.sem_num = semaphore; |
---|
946 | sb.sem_op = 1; |
---|
947 | sb.sem_flg = 0; |
---|
948 | |
---|
949 | while (1) { |
---|
950 | status = semop(_CPU_SHM_Semid, &sb, 1); |
---|
951 | if ( status >= 0 ) |
---|
952 | break; |
---|
953 | |
---|
954 | if ( status == -1 ) { |
---|
955 | fix_syscall_errno(); /* in case of newlib */ |
---|
956 | if (errno == EINTR) |
---|
957 | continue; |
---|
958 | perror("shm unlock"); |
---|
959 | _CPU_Fatal_halt( 0xdead0006 ); |
---|
960 | } |
---|
961 | } |
---|
962 | |
---|
963 | } |
---|