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1 //========================================================================== |
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2 // |
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3 // instrmnt/meminst.cxx |
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4 // |
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5 // Memory buffer instrumentation functions |
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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) 1998,1999 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): nickg |
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33 // Contributors: nickg |
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34 // Date: 1997-10-27 |
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35 // Purpose: Instrumentation functions |
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36 // Description: The functions in this file are implementations of the |
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37 // standard instrumentation functions that place records |
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38 // into a memory buffer. |
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39 // |
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40 //####DESCRIPTIONEND#### |
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41 // |
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42 //========================================================================== |
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43 |
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44 #include <pkgconf/kernel.h> |
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45 |
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46 #include <cyg/kernel/ktypes.h> // base kernel types |
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47 #include <cyg/infra/cyg_trac.h> // tracing macros |
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48 #include <cyg/infra/cyg_ass.h> // assertion macros |
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49 #include <cyg/kernel/instrmnt.h> // instrumentation |
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50 |
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51 #include <cyg/kernel/intr.hxx> // interrupt control |
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52 #include <cyg/kernel/sched.hxx> // scheduler defines |
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53 |
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54 #include <cyg/kernel/sched.inl> // scheduler inlines |
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55 #include <cyg/kernel/clock.inl> // clock inlines |
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56 |
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57 #ifdef CYGPKG_KERNEL_INSTRUMENT |
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58 |
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59 // ------------------------------------------------------------------------- |
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60 // Instrumentation record. |
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61 |
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62 struct Instrument_Record |
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63 { |
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64 CYG_WORD16 type; // record type |
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65 CYG_WORD16 thread; // current thread id |
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66 CYG_WORD timestamp; // 32 bit timestamp |
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67 CYG_WORD arg1; // first arg |
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68 CYG_WORD arg2; // second arg |
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69 }; |
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70 |
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71 // ------------------------------------------------------------------------- |
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72 // Buffer base and end. This buffer must be a whole number of |
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73 |
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74 #ifdef CYGVAR_KERNEL_INSTRUMENT_EXTERNAL_BUFFER |
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75 |
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76 externC Instrument_Record instrument_buffer[]; |
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77 externC cyg_uint32 instrument_buffer_size; |
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78 |
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79 #else |
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80 |
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81 extern "C" |
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82 { |
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83 |
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84 Instrument_Record instrument_buffer[CYGNUM_KERNEL_INSTRUMENT_BUFFER_SIZE]; |
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85 |
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86 cyg_uint32 instrument_buffer_size = CYGNUM_KERNEL_INSTRUMENT_BUFFER_SIZE; |
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87 |
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88 }; |
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89 |
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90 #endif |
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91 |
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92 extern "C" |
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93 { |
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94 |
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95 #define instrument_buffer_start instrument_buffer[0] |
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96 #define instrument_buffer_end instrument_buffer[instrument_buffer_size] |
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97 |
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98 extern "C" |
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99 { |
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100 Instrument_Record *instrument_buffer_pointer = &instrument_buffer_start; |
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101 }; |
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102 |
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103 #ifdef CYGDBG_KERNEL_INSTRUMENT_FLAGS |
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104 |
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105 // This array contains a 32 bit word for each event class. The |
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106 // bits in the word correspond to events. By setting or clearing |
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107 // the appropriate bit, the selected instrumentation event may |
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108 // be enabled or disabled dynamically. |
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109 |
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110 cyg_uint32 instrument_flags[(CYG_INSTRUMENT_CLASS_MAX>>8)+1]; |
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111 |
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112 #endif |
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113 |
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114 }; |
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115 |
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116 // ------------------------------------------------------------------------- |
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117 |
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118 void cyg_instrument( cyg_uint32 type, CYG_ADDRWORD arg1, CYG_ADDRWORD arg2 ) |
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119 { |
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120 |
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121 cyg_uint32 old_ints; |
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122 |
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123 #ifdef CYGDBG_KERNEL_INSTRUMENT_FLAGS |
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124 |
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125 cyg_ucount8 cl = (type>>8)&0xff; |
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126 cyg_ucount8 event = type&0xff; |
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127 |
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128 if( instrument_flags[cl] & (1<<event) ) |
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129 #endif |
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130 { |
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131 HAL_DISABLE_INTERRUPTS(old_ints); |
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132 |
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133 Instrument_Record *p = instrument_buffer_pointer; |
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134 Cyg_Thread *t = Cyg_Scheduler::get_current_thread(); |
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135 p->type = type; |
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136 p->thread = (t==0)?0xFFFF:t->get_unique_id(); |
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137 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK |
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138 // p->timestamp = Cyg_Clock::real_time_clock->current_value_lo(); |
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139 HAL_CLOCK_READ( &p->timestamp ); |
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140 #else |
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141 p->timestamp = 0; |
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142 #endif |
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143 p->arg1 = arg1; |
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144 p->arg2 = arg2; |
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145 |
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146 p++; |
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147 if( p == &instrument_buffer_end ) |
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148 instrument_buffer_pointer = &instrument_buffer_start; |
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149 else instrument_buffer_pointer = p; |
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150 |
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151 HAL_RESTORE_INTERRUPTS(old_ints); |
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152 } |
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153 |
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154 return; |
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155 } |
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156 |
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157 // ------------------------------------------------------------------------- |
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158 // Functions to enable and disable selected instrumentation events |
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159 // when the flags are enabled. |
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160 |
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161 #ifdef CYGDBG_KERNEL_INSTRUMENT_FLAGS |
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162 |
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163 externC void cyg_instrument_enable( cyg_uint32 cl, cyg_uint32 event) |
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164 { |
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165 if( 0 != event ) |
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166 instrument_flags[cl>>8] |= 1<<event; |
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167 else |
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168 instrument_flags[cl>>8] = ~0; |
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169 } |
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170 |
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171 externC void cyg_instrument_disable( cyg_uint32 cl, cyg_uint32 event) |
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172 { |
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173 if( 0 != event ) |
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174 instrument_flags[cl>>8] &= ~(1<<event); |
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175 else |
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176 instrument_flags[cl>>8] = 0; |
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177 |
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178 } |
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179 |
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180 #endif |
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181 |
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182 // ------------------------------------------------------------------------- |
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183 |
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184 #endif // CYGPKG_KERNEL_INSTRUMENT |
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185 |
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186 // EOF instrmnt/null.cxx |
