2 * FreeRTOS Kernel V10.0.0
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3 * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software. If you wish to use our Amazon
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14 * FreeRTOS name, please do so in a fair use way that does not cause confusion.
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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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18 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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19 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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20 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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23 * http://www.FreeRTOS.org
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24 * http://aws.amazon.com/freertos
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26 * 1 tab == 4 spaces!
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30 * "Reg test" tasks - These fill the registers with known values, then check
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31 * that each register maintains its expected value for the lifetime of the
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32 * task. Each task uses a different set of values. The reg test tasks execute
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33 * with a very low priority, so get preempted very frequently. A register
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34 * containing an unexpected value is indicative of an error in the context
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35 * switching mechanism.
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38 void vRegTest1Task( void ) __attribute__((naked));
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39 void vRegTest2Task( void ) __attribute__((naked));
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41 void vRegTest1Task( void )
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45 ".extern ulRegTest1LoopCounter \n"
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47 " /* Fill the core registers with known values. */ \n"
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70 " bne reg1_error_loop \n"
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72 " bne reg1_error_loop \n"
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74 " bne reg1_error_loop \n"
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76 " bne reg1_error_loop \n"
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78 " bne reg1_error_loop \n"
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80 " bne reg1_error_loop \n"
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82 " bne reg1_error_loop \n"
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84 " bne reg1_error_loop \n"
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87 " bne reg1_error_loop \n"
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90 " bne reg1_error_loop \n"
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93 " bne reg1_error_loop \n"
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96 " bne reg1_error_loop \n"
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99 " bne reg1_error_loop \n"
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101 " /* Everything passed, increment the loop counter. */ \n"
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103 " ldr r0, =ulRegTest1LoopCounter \n"
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105 " add r1, r1, #1 \n"
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108 " /* Yield to increase test coverage. */ \n"
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109 " movs r0, #0x01 \n"
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110 " ldr r1, =0xe000ed04 \n" /*NVIC_INT_CTRL */
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111 " lsl r0, #28 \n" /* Shift to PendSV bit */
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116 " /* Start again. */ \n"
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117 " movs r0, #100 \n"
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120 "reg1_error_loop: \n"
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121 " /* If this line is hit then there was an error in a core register value. \n"
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122 " The loop ensures the loop counter stops incrementing. */ \n"
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123 " b reg1_error_loop \n"
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127 /*-----------------------------------------------------------*/
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129 void vRegTest2Task( void )
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133 ".extern ulRegTest2LoopCounter \n"
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135 " /* Fill the core registers with known values. */ \n"
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158 " bne reg2_error_loop \n"
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160 " bne reg2_error_loop \n"
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162 " bne reg2_error_loop \n"
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164 " bne reg2_error_loop \n"
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166 " bne reg2_error_loop \n"
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168 " bne reg2_error_loop \n"
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170 " bne reg2_error_loop \n"
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172 " bne reg2_error_loop \n"
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175 " bne reg2_error_loop \n"
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178 " bne reg2_error_loop \n"
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181 " bne reg2_error_loop \n"
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184 " bne reg2_error_loop \n"
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187 " bne reg2_error_loop \n"
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189 " /* Everything passed, increment the loop counter. */ \n"
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191 " ldr r0, =ulRegTest2LoopCounter \n"
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193 " add r1, r1, #1 \n"
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197 " /* Start again. */ \n"
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201 "reg2_error_loop: \n"
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202 " /* If this line is hit then there was an error in a core register value. \n"
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203 " The loop ensures the loop counter stops incrementing. */ \n"
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204 " b reg2_error_loop \n"
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208 /*-----------------------------------------------------------*/
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