diff options
Diffstat (limited to 'startup.s')
| -rw-r--r-- | startup.s | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/startup.s b/startup.s new file mode 100644 index 0000000..44978c0 --- /dev/null +++ b/startup.s @@ -0,0 +1,357 @@ +/** + *************** (C) COPYRIGHT 2017 STMicroelectronics ************************ + * @file startup_stm32f103xb.s + * @author MCD Application Team + * @brief STM32F103xB Devices vector table for Atollic toolchain. + * This module performs: + * - Set the initial SP + * - Set the initial PC == Reset_Handler, + * - Set the vector table entries with the exceptions ISR address + * - Configure the clock system + * - Branches to main in the C library (which eventually + * calls main()). + * After Reset the Cortex-M3 processor is in Thread mode, + * priority is Privileged, and the Stack is set to Main. + * @attention + * + * Copyright (c) 2017 STMicroelectronics. + * All rights reserved. + * + * This software is licensed under terms that can be found in the LICENSE file + * in the root directory of this software component. + * If no LICENSE file comes with this software, it is provided AS-IS. + * + ****************************************************************************** + */ + + .syntax unified + .cpu cortex-m3 + .fpu softvfp + .thumb + +.global g_pfnVectors +.global Default_Handler + +/* start address for the initialization values of the .data section. +defined in linker script */ +.word _sidata +/* start address for the .data section. defined in linker script */ +.word _sdata +/* end address for the .data section. defined in linker script */ +.word _edata +/* start address for the .bss section. defined in linker script */ +.word _sbss +/* end address for the .bss section. defined in linker script */ +.word _ebss + +.equ BootRAM, 0xF108F85F +/** + * @brief This is the code that gets called when the processor first + * starts execution following a reset event. Only the absolutely + * necessary set is performed, after which the application + * supplied main() routine is called. + * @param None + * @retval : None +*/ + + .section .text.Reset_Handler + .weak Reset_Handler + .type Reset_Handler, %function +Reset_Handler: + +/* Copy the data segment initializers from flash to SRAM */ + movs r1, #0 + b LoopCopyDataInit + +CopyDataInit: + ldr r3, =_sidata + ldr r3, [r3, r1] + str r3, [r0, r1] + adds r1, r1, #4 + +LoopCopyDataInit: + ldr r0, =_sdata + ldr r3, =_edata + adds r2, r0, r1 + cmp r2, r3 + bcc CopyDataInit + ldr r2, =_sbss + b LoopFillZerobss +/* Zero fill the bss segment. */ +FillZerobss: + movs r3, #0 + str r3, [r2], #4 + +LoopFillZerobss: + ldr r3, = _ebss + cmp r2, r3 + bcc FillZerobss + +/* Call the clock system initialization function.*/ + bl SystemInit +/* Call static constructors */ + bl __libc_init_array +/* Call the application's entry point.*/ + bl main + bx lr +.size Reset_Handler, .-Reset_Handler + +/** + * @brief This is the code that gets called when the processor receives an + * unexpected interrupt. This simply enters an infinite loop, preserving + * the system state for examination by a debugger. + * + * @param None + * @retval : None +*/ + .section .text.Default_Handler,"ax",%progbits +Default_Handler: +Infinite_Loop: + b Infinite_Loop + .size Default_Handler, .-Default_Handler +/****************************************************************************** +* +* The minimal vector table for a Cortex M3. Note that the proper constructs +* must be placed on this to ensure that it ends up at physical address +* 0x0000.0000. +* +******************************************************************************/ + .section .isr_vector,"a",%progbits + .type g_pfnVectors, %object + .size g_pfnVectors, .-g_pfnVectors + + +g_pfnVectors: + + .word _estack + .word Reset_Handler + .word NMI_Handler + .word HardFault_Handler + .word MemManage_Handler + .word BusFault_Handler + .word UsageFault_Handler + .word 0 + .word 0 + .word 0 + .word 0 + .word SVC_Handler + .word DebugMon_Handler + .word 0 + .word PendSV_Handler + .word SysTick_Handler + .word WWDG_IRQHandler + .word PVD_IRQHandler + .word TAMPER_IRQHandler + .word RTC_IRQHandler + .word FLASH_IRQHandler + .word RCC_IRQHandler + .word EXTI0_IRQHandler + .word EXTI1_IRQHandler + .word EXTI2_IRQHandler + .word EXTI3_IRQHandler + .word EXTI4_IRQHandler + .word DMA1_Channel1_IRQHandler + .word DMA1_Channel2_IRQHandler + .word DMA1_Channel3_IRQHandler + .word DMA1_Channel4_IRQHandler + .word DMA1_Channel5_IRQHandler + .word DMA1_Channel6_IRQHandler + .word DMA1_Channel7_IRQHandler + .word ADC1_2_IRQHandler + .word USB_HP_CAN1_TX_IRQHandler + .word USB_LP_CAN1_RX0_IRQHandler + .word CAN1_RX1_IRQHandler + .word CAN1_SCE_IRQHandler + .word EXTI9_5_IRQHandler + .word TIM1_BRK_IRQHandler + .word TIM1_UP_IRQHandler + .word TIM1_TRG_COM_IRQHandler + .word TIM1_CC_IRQHandler + .word TIM2_IRQHandler + .word TIM3_IRQHandler + .word TIM4_IRQHandler + .word I2C1_EV_IRQHandler + .word I2C1_ER_IRQHandler + .word I2C2_EV_IRQHandler + .word I2C2_ER_IRQHandler + .word SPI1_IRQHandler + .word SPI2_IRQHandler + .word USART1_IRQHandler + .word USART2_IRQHandler + .word USART3_IRQHandler + .word EXTI15_10_IRQHandler + .word RTC_Alarm_IRQHandler + .word USBWakeUp_IRQHandler + .word 0 + .word 0 + .word 0 + .word 0 + .word 0 + .word 0 + .word 0 + .word BootRAM /* @0x108. This is for boot in RAM mode for + STM32F10x Medium Density devices. */ + +/******************************************************************************* +* +* Provide weak aliases for each Exception handler to the Default_Handler. +* As they are weak aliases, any function with the same name will override +* this definition. +* +*******************************************************************************/ + + .weak NMI_Handler + .thumb_set NMI_Handler,Default_Handler + + .weak HardFault_Handler + .thumb_set HardFault_Handler,Default_Handler + + .weak MemManage_Handler + .thumb_set MemManage_Handler,Default_Handler + + .weak BusFault_Handler + .thumb_set BusFault_Handler,Default_Handler + + .weak UsageFault_Handler + .thumb_set UsageFault_Handler,Default_Handler + + .weak SVC_Handler + .thumb_set SVC_Handler,Default_Handler + + .weak DebugMon_Handler + .thumb_set DebugMon_Handler,Default_Handler + + .weak PendSV_Handler + .thumb_set PendSV_Handler,Default_Handler + + .weak SysTick_Handler + .thumb_set SysTick_Handler,Default_Handler + + .weak WWDG_IRQHandler + .thumb_set WWDG_IRQHandler,Default_Handler + + .weak PVD_IRQHandler + .thumb_set PVD_IRQHandler,Default_Handler + + .weak TAMPER_IRQHandler + .thumb_set TAMPER_IRQHandler,Default_Handler + + .weak RTC_IRQHandler + .thumb_set RTC_IRQHandler,Default_Handler + + .weak FLASH_IRQHandler + .thumb_set FLASH_IRQHandler,Default_Handler + + .weak RCC_IRQHandler + .thumb_set RCC_IRQHandler,Default_Handler + + .weak EXTI0_IRQHandler + .thumb_set EXTI0_IRQHandler,Default_Handler + + .weak EXTI1_IRQHandler + .thumb_set EXTI1_IRQHandler,Default_Handler + + .weak EXTI2_IRQHandler + .thumb_set EXTI2_IRQHandler,Default_Handler + + .weak EXTI3_IRQHandler + .thumb_set EXTI3_IRQHandler,Default_Handler + + .weak EXTI4_IRQHandler + .thumb_set EXTI4_IRQHandler,Default_Handler + + .weak DMA1_Channel1_IRQHandler + .thumb_set DMA1_Channel1_IRQHandler,Default_Handler + + .weak DMA1_Channel2_IRQHandler + .thumb_set DMA1_Channel2_IRQHandler,Default_Handler + + .weak DMA1_Channel3_IRQHandler + .thumb_set DMA1_Channel3_IRQHandler,Default_Handler + + .weak DMA1_Channel4_IRQHandler + .thumb_set DMA1_Channel4_IRQHandler,Default_Handler + + .weak DMA1_Channel5_IRQHandler + .thumb_set DMA1_Channel5_IRQHandler,Default_Handler + + .weak DMA1_Channel6_IRQHandler + .thumb_set DMA1_Channel6_IRQHandler,Default_Handler + + .weak DMA1_Channel7_IRQHandler + .thumb_set DMA1_Channel7_IRQHandler,Default_Handler + + .weak ADC1_2_IRQHandler + .thumb_set ADC1_2_IRQHandler,Default_Handler + + .weak USB_HP_CAN1_TX_IRQHandler + .thumb_set USB_HP_CAN1_TX_IRQHandler,Default_Handler + + .weak USB_LP_CAN1_RX0_IRQHandler + .thumb_set USB_LP_CAN1_RX0_IRQHandler,Default_Handler + + .weak CAN1_RX1_IRQHandler + .thumb_set CAN1_RX1_IRQHandler,Default_Handler + + .weak CAN1_SCE_IRQHandler + .thumb_set CAN1_SCE_IRQHandler,Default_Handler + + .weak EXTI9_5_IRQHandler + .thumb_set EXTI9_5_IRQHandler,Default_Handler + + .weak TIM1_BRK_IRQHandler + .thumb_set TIM1_BRK_IRQHandler,Default_Handler + + .weak TIM1_UP_IRQHandler + .thumb_set TIM1_UP_IRQHandler,Default_Handler + + .weak TIM1_TRG_COM_IRQHandler + .thumb_set TIM1_TRG_COM_IRQHandler,Default_Handler + + .weak TIM1_CC_IRQHandler + .thumb_set TIM1_CC_IRQHandler,Default_Handler + + .weak TIM2_IRQHandler + .thumb_set TIM2_IRQHandler,Default_Handler + + .weak TIM3_IRQHandler + .thumb_set TIM3_IRQHandler,Default_Handler + + .weak TIM4_IRQHandler + .thumb_set TIM4_IRQHandler,Default_Handler + + .weak I2C1_EV_IRQHandler + .thumb_set I2C1_EV_IRQHandler,Default_Handler + + .weak I2C1_ER_IRQHandler + .thumb_set I2C1_ER_IRQHandler,Default_Handler + + .weak I2C2_EV_IRQHandler + .thumb_set I2C2_EV_IRQHandler,Default_Handler + + .weak I2C2_ER_IRQHandler + .thumb_set I2C2_ER_IRQHandler,Default_Handler + + .weak SPI1_IRQHandler + .thumb_set SPI1_IRQHandler,Default_Handler + + .weak SPI2_IRQHandler + .thumb_set SPI2_IRQHandler,Default_Handler + + .weak USART1_IRQHandler + .thumb_set USART1_IRQHandler,Default_Handler + + .weak USART2_IRQHandler + .thumb_set USART2_IRQHandler,Default_Handler + + .weak USART3_IRQHandler + .thumb_set USART3_IRQHandler,Default_Handler + + .weak EXTI15_10_IRQHandler + .thumb_set EXTI15_10_IRQHandler,Default_Handler + + .weak RTC_Alarm_IRQHandler + .thumb_set RTC_Alarm_IRQHandler,Default_Handler + + .weak USBWakeUp_IRQHandler + .thumb_set USBWakeUp_IRQHandler,Default_Handler |