Core/Startup/startup_stm32f103rbtx.s (9725B)
1 /** 2 *************** (C) COPYRIGHT 2017 STMicroelectronics ************************ 3 * @file startup_stm32f103xb.s 4 * @author MCD Application Team 5 * @brief STM32F103xB Devices vector table for Atollic toolchain. 6 * This module performs: 7 * - Set the initial SP 8 * - Set the initial PC == Reset_Handler, 9 * - Set the vector table entries with the exceptions ISR address 10 * - Configure the clock system 11 * - Branches to main in the C library (which eventually 12 * calls main()). 13 * After Reset the Cortex-M3 processor is in Thread mode, 14 * priority is Privileged, and the Stack is set to Main. 15 ****************************************************************************** 16 * @attention 17 * 18 * Copyright (c) 2017-2021 STMicroelectronics. 19 * All rights reserved. 20 * 21 * This software is licensed under terms that can be found in the LICENSE file 22 * in the root directory of this software component. 23 * If no LICENSE file comes with this software, it is provided AS-IS. 24 * 25 ****************************************************************************** 26 */ 27 28 .syntax unified 29 .cpu cortex-m3 30 .fpu softvfp 31 .thumb 32 33 .global g_pfnVectors 34 .global Default_Handler 35 36 /* start address for the initialization values of the .data section. 37 defined in linker script */ 38 .word _sidata 39 /* start address for the .data section. defined in linker script */ 40 .word _sdata 41 /* end address for the .data section. defined in linker script */ 42 .word _edata 43 /* start address for the .bss section. defined in linker script */ 44 .word _sbss 45 /* end address for the .bss section. defined in linker script */ 46 .word _ebss 47 48 .equ BootRAM, 0xF108F85F 49 /** 50 * @brief This is the code that gets called when the processor first 51 * starts execution following a reset event. Only the absolutely 52 * necessary set is performed, after which the application 53 * supplied main() routine is called. 54 * @param None 55 * @retval : None 56 */ 57 58 .section .text.Reset_Handler 59 .weak Reset_Handler 60 .type Reset_Handler, %function 61 Reset_Handler: 62 63 /* Call the clock system initialization function.*/ 64 bl SystemInit 65 66 /* Copy the data segment initializers from flash to SRAM */ 67 ldr r0, =_sdata 68 ldr r1, =_edata 69 ldr r2, =_sidata 70 movs r3, #0 71 b LoopCopyDataInit 72 73 CopyDataInit: 74 ldr r4, [r2, r3] 75 str r4, [r0, r3] 76 adds r3, r3, #4 77 78 LoopCopyDataInit: 79 adds r4, r0, r3 80 cmp r4, r1 81 bcc CopyDataInit 82 83 /* Zero fill the bss segment. */ 84 ldr r2, =_sbss 85 ldr r4, =_ebss 86 movs r3, #0 87 b LoopFillZerobss 88 89 FillZerobss: 90 str r3, [r2] 91 adds r2, r2, #4 92 93 LoopFillZerobss: 94 cmp r2, r4 95 bcc FillZerobss 96 97 /* Call static constructors */ 98 bl __libc_init_array 99 /* Call the application's entry point.*/ 100 bl main 101 bx lr 102 .size Reset_Handler, .-Reset_Handler 103 104 /** 105 * @brief This is the code that gets called when the processor receives an 106 * unexpected interrupt. This simply enters an infinite loop, preserving 107 * the system state for examination by a debugger. 108 * 109 * @param None 110 * @retval : None 111 */ 112 .section .text.Default_Handler,"ax",%progbits 113 Default_Handler: 114 Infinite_Loop: 115 b Infinite_Loop 116 .size Default_Handler, .-Default_Handler 117 /****************************************************************************** 118 * 119 * The minimal vector table for a Cortex M3. Note that the proper constructs 120 * must be placed on this to ensure that it ends up at physical address 121 * 0x0000.0000. 122 * 123 ******************************************************************************/ 124 .section .isr_vector,"a",%progbits 125 .type g_pfnVectors, %object 126 .size g_pfnVectors, .-g_pfnVectors 127 128 129 g_pfnVectors: 130 131 .word _estack 132 .word Reset_Handler 133 .word NMI_Handler 134 .word HardFault_Handler 135 .word MemManage_Handler 136 .word BusFault_Handler 137 .word UsageFault_Handler 138 .word 0 139 .word 0 140 .word 0 141 .word 0 142 .word SVC_Handler 143 .word DebugMon_Handler 144 .word 0 145 .word PendSV_Handler 146 .word SysTick_Handler 147 .word WWDG_IRQHandler 148 .word PVD_IRQHandler 149 .word TAMPER_IRQHandler 150 .word RTC_IRQHandler 151 .word FLASH_IRQHandler 152 .word RCC_IRQHandler 153 .word EXTI0_IRQHandler 154 .word EXTI1_IRQHandler 155 .word EXTI2_IRQHandler 156 .word EXTI3_IRQHandler 157 .word EXTI4_IRQHandler 158 .word DMA1_Channel1_IRQHandler 159 .word DMA1_Channel2_IRQHandler 160 .word DMA1_Channel3_IRQHandler 161 .word DMA1_Channel4_IRQHandler 162 .word DMA1_Channel5_IRQHandler 163 .word DMA1_Channel6_IRQHandler 164 .word DMA1_Channel7_IRQHandler 165 .word ADC1_2_IRQHandler 166 .word USB_HP_CAN1_TX_IRQHandler 167 .word USB_LP_CAN1_RX0_IRQHandler 168 .word CAN1_RX1_IRQHandler 169 .word CAN1_SCE_IRQHandler 170 .word EXTI9_5_IRQHandler 171 .word TIM1_BRK_IRQHandler 172 .word TIM1_UP_IRQHandler 173 .word TIM1_TRG_COM_IRQHandler 174 .word TIM1_CC_IRQHandler 175 .word TIM2_IRQHandler 176 .word TIM3_IRQHandler 177 .word TIM4_IRQHandler 178 .word I2C1_EV_IRQHandler 179 .word I2C1_ER_IRQHandler 180 .word I2C2_EV_IRQHandler 181 .word I2C2_ER_IRQHandler 182 .word SPI1_IRQHandler 183 .word SPI2_IRQHandler 184 .word USART1_IRQHandler 185 .word USART2_IRQHandler 186 .word USART3_IRQHandler 187 .word EXTI15_10_IRQHandler 188 .word RTC_Alarm_IRQHandler 189 .word USBWakeUp_IRQHandler 190 .word 0 191 .word 0 192 .word 0 193 .word 0 194 .word 0 195 .word 0 196 .word 0 197 .word BootRAM /* @0x108. This is for boot in RAM mode for 198 STM32F10x Medium Density devices. */ 199 200 /******************************************************************************* 201 * 202 * Provide weak aliases for each Exception handler to the Default_Handler. 203 * As they are weak aliases, any function with the same name will override 204 * this definition. 205 * 206 *******************************************************************************/ 207 208 .weak NMI_Handler 209 .thumb_set NMI_Handler,Default_Handler 210 211 .weak HardFault_Handler 212 .thumb_set HardFault_Handler,Default_Handler 213 214 .weak MemManage_Handler 215 .thumb_set MemManage_Handler,Default_Handler 216 217 .weak BusFault_Handler 218 .thumb_set BusFault_Handler,Default_Handler 219 220 .weak UsageFault_Handler 221 .thumb_set UsageFault_Handler,Default_Handler 222 223 .weak SVC_Handler 224 .thumb_set SVC_Handler,Default_Handler 225 226 .weak DebugMon_Handler 227 .thumb_set DebugMon_Handler,Default_Handler 228 229 .weak PendSV_Handler 230 .thumb_set PendSV_Handler,Default_Handler 231 232 .weak SysTick_Handler 233 .thumb_set SysTick_Handler,Default_Handler 234 235 .weak WWDG_IRQHandler 236 .thumb_set WWDG_IRQHandler,Default_Handler 237 238 .weak PVD_IRQHandler 239 .thumb_set PVD_IRQHandler,Default_Handler 240 241 .weak TAMPER_IRQHandler 242 .thumb_set TAMPER_IRQHandler,Default_Handler 243 244 .weak RTC_IRQHandler 245 .thumb_set RTC_IRQHandler,Default_Handler 246 247 .weak FLASH_IRQHandler 248 .thumb_set FLASH_IRQHandler,Default_Handler 249 250 .weak RCC_IRQHandler 251 .thumb_set RCC_IRQHandler,Default_Handler 252 253 .weak EXTI0_IRQHandler 254 .thumb_set EXTI0_IRQHandler,Default_Handler 255 256 .weak EXTI1_IRQHandler 257 .thumb_set EXTI1_IRQHandler,Default_Handler 258 259 .weak EXTI2_IRQHandler 260 .thumb_set EXTI2_IRQHandler,Default_Handler 261 262 .weak EXTI3_IRQHandler 263 .thumb_set EXTI3_IRQHandler,Default_Handler 264 265 .weak EXTI4_IRQHandler 266 .thumb_set EXTI4_IRQHandler,Default_Handler 267 268 .weak DMA1_Channel1_IRQHandler 269 .thumb_set DMA1_Channel1_IRQHandler,Default_Handler 270 271 .weak DMA1_Channel2_IRQHandler 272 .thumb_set DMA1_Channel2_IRQHandler,Default_Handler 273 274 .weak DMA1_Channel3_IRQHandler 275 .thumb_set DMA1_Channel3_IRQHandler,Default_Handler 276 277 .weak DMA1_Channel4_IRQHandler 278 .thumb_set DMA1_Channel4_IRQHandler,Default_Handler 279 280 .weak DMA1_Channel5_IRQHandler 281 .thumb_set DMA1_Channel5_IRQHandler,Default_Handler 282 283 .weak DMA1_Channel6_IRQHandler 284 .thumb_set DMA1_Channel6_IRQHandler,Default_Handler 285 286 .weak DMA1_Channel7_IRQHandler 287 .thumb_set DMA1_Channel7_IRQHandler,Default_Handler 288 289 .weak ADC1_2_IRQHandler 290 .thumb_set ADC1_2_IRQHandler,Default_Handler 291 292 .weak USB_HP_CAN1_TX_IRQHandler 293 .thumb_set USB_HP_CAN1_TX_IRQHandler,Default_Handler 294 295 .weak USB_LP_CAN1_RX0_IRQHandler 296 .thumb_set USB_LP_CAN1_RX0_IRQHandler,Default_Handler 297 298 .weak CAN1_RX1_IRQHandler 299 .thumb_set CAN1_RX1_IRQHandler,Default_Handler 300 301 .weak CAN1_SCE_IRQHandler 302 .thumb_set CAN1_SCE_IRQHandler,Default_Handler 303 304 .weak EXTI9_5_IRQHandler 305 .thumb_set EXTI9_5_IRQHandler,Default_Handler 306 307 .weak TIM1_BRK_IRQHandler 308 .thumb_set TIM1_BRK_IRQHandler,Default_Handler 309 310 .weak TIM1_UP_IRQHandler 311 .thumb_set TIM1_UP_IRQHandler,Default_Handler 312 313 .weak TIM1_TRG_COM_IRQHandler 314 .thumb_set TIM1_TRG_COM_IRQHandler,Default_Handler 315 316 .weak TIM1_CC_IRQHandler 317 .thumb_set TIM1_CC_IRQHandler,Default_Handler 318 319 .weak TIM2_IRQHandler 320 .thumb_set TIM2_IRQHandler,Default_Handler 321 322 .weak TIM3_IRQHandler 323 .thumb_set TIM3_IRQHandler,Default_Handler 324 325 .weak TIM4_IRQHandler 326 .thumb_set TIM4_IRQHandler,Default_Handler 327 328 .weak I2C1_EV_IRQHandler 329 .thumb_set I2C1_EV_IRQHandler,Default_Handler 330 331 .weak I2C1_ER_IRQHandler 332 .thumb_set I2C1_ER_IRQHandler,Default_Handler 333 334 .weak I2C2_EV_IRQHandler 335 .thumb_set I2C2_EV_IRQHandler,Default_Handler 336 337 .weak I2C2_ER_IRQHandler 338 .thumb_set I2C2_ER_IRQHandler,Default_Handler 339 340 .weak SPI1_IRQHandler 341 .thumb_set SPI1_IRQHandler,Default_Handler 342 343 .weak SPI2_IRQHandler 344 .thumb_set SPI2_IRQHandler,Default_Handler 345 346 .weak USART1_IRQHandler 347 .thumb_set USART1_IRQHandler,Default_Handler 348 349 .weak USART2_IRQHandler 350 .thumb_set USART2_IRQHandler,Default_Handler 351 352 .weak USART3_IRQHandler 353 .thumb_set USART3_IRQHandler,Default_Handler 354 355 .weak EXTI15_10_IRQHandler 356 .thumb_set EXTI15_10_IRQHandler,Default_Handler 357 358 .weak RTC_Alarm_IRQHandler 359 .thumb_set RTC_Alarm_IRQHandler,Default_Handler 360 361 .weak USBWakeUp_IRQHandler 362 .thumb_set USBWakeUp_IRQHandler,Default_Handler 363 364