circuitpython/ports/stm32/boards/startup_stm32l4.s

/**
  ******************************************************************************
  * @file      startup_stm32l496xx.s
  * @author    MCD Application Team
  * @brief     STM32L496xx devices vector table GCC toolchain.
  *            This module performs:
  *                - Set the initial SP
  *                - Set the initial PC == Reset_Handler,
  *                - Set the vector table entries with the exceptions ISR address,
  *                - Branches to main in the C library (which eventually
  *                  calls main()).
  *            After Reset the Cortex-M4 processor is in Thread mode,
  *            priority is Privileged, and the Stack is set to Main.
  *  Taken from STM32L4 template code for stm32l496 in STM32Cube_FW_L4_V1.11.0
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2017 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

  .syntax unified
  .cpu cortex-m4
  .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
/* stack used for SystemInit_ExtMemCtl; always internal RAM used */

.equ BootRAM,        0xF1E0F85F
/**
 * @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:
  ldr   sp, =_estack     /* set stack pointer */

/* 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-M4.  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

  /* External Interrupts */
  .word     WWDG_IRQHandler                   /* Window WatchDog              */
  .word     PVD_PVM_IRQHandler                /* PVD and PVM through EXTI line detection */
  .word     TAMP_STAMP_IRQHandler             /* Tamper and TimeStamps through the EXTI line */
  .word     RTC_WKUP_IRQHandler               /* RTC Wakeup through the EXTI line */
  .word     FLASH_IRQHandler                  /* FLASH                        */
  .word     RCC_IRQHandler                    /* RCC                          */
  .word     EXTI0_IRQHandler                  /* EXTI Line0                   */
  .word     EXTI1_IRQHandler                  /* EXTI Line1                   */
  .word     EXTI2_IRQHandler                  /* EXTI Line2                   */
  .word     EXTI3_IRQHandler                  /* EXTI Line3                   */
  .word     EXTI4_IRQHandler                  /* EXTI Line4                   */
  .word     DMA1_Channel1_IRQHandler          /* DMA1 Channel 1               */
  .word     DMA1_Channel2_IRQHandler          /* DMA1 Channel 2               */
  .word     DMA1_Channel3_IRQHandler          /* DMA1 Channel 3               */
  .word     DMA1_Channel4_IRQHandler          /* DMA1 Channel 4               */
  .word     DMA1_Channel5_IRQHandler          /* DMA1 Channel 5               */
  .word     DMA1_Channel6_IRQHandler          /* DMA1 Channel 6               */
  .word     DMA1_Channel7_IRQHandler          /* DMA1 Channel 7               */
  .word     ADC1_2_IRQHandler                 /* ADC1 and ADC2                */
  .word     CAN1_TX_IRQHandler                /* CAN1 TX                      */
  .word     CAN1_RX0_IRQHandler               /* CAN1 RX0                     */
  .word     CAN1_RX1_IRQHandler               /* CAN1 RX1                     */
  .word     CAN1_SCE_IRQHandler               /* CAN1 SCE                     */
  .word     EXTI9_5_IRQHandler                /* External Line[9:5]s          */
  .word     TIM1_BRK_TIM15_IRQHandler         /* TIM1 Break and TIM15         */
  .word     TIM1_UP_TIM16_IRQHandler          /* TIM1 Update and TIM16        */
  .word     TIM1_TRG_COM_TIM17_IRQHandler     /* TIM1 Trigger and Commutation and TIM17 */
  .word     TIM1_CC_IRQHandler                /* TIM1 Capture Compare         */
  .word     TIM2_IRQHandler                   /* TIM2                         */
  .word     TIM3_IRQHandler                   /* TIM3                         */
  .word     TIM4_IRQHandler                   /* TIM4                         */
  .word     I2C1_EV_IRQHandler                /* I2C1 Event                   */
  .word     I2C1_ER_IRQHandler                /* I2C1 Error                   */
  .word     I2C2_EV_IRQHandler                /* I2C2 Event                   */
  .word     I2C2_ER_IRQHandler                /* I2C2 Error                   */
  .word     SPI1_IRQHandler                   /* SPI1                         */
  .word     SPI2_IRQHandler                   /* SPI2                         */
  .word     USART1_IRQHandler                 /* USART1                       */
  .word     USART2_IRQHandler                 /* USART2                       */
  .word     USART3_IRQHandler                 /* USART3                       */
  .word     EXTI15_10_IRQHandler              /* External Line[15:10]s        */
  .word     RTC_Alarm_IRQHandler              /* RTC Alarm (A and B) through EXTI Line */
  .word     DFSDM1_FLT3_IRQHandler            /* Digital filter 3 for sigma delta modulator */
  .word     TIM8_BRK_IRQHandler               /* TIM8 Break                   */
  .word     TIM8_UP_IRQHandler                /* TIM8 Update                  */
  .word     TIM8_TRG_COM_IRQHandler           /* TIM8 Trigger and Commutation */
  .word     TIM8_CC_IRQHandler                /* TIM8 Capture Compare         */
  .word     ADC3_IRQHandler                   /* ADC3 global interrupt        */
  .word     FMC_IRQHandler                    /* FMC                          */
  .word     SDMMC1_IRQHandler                 /* SDMMC1                       */
  .word     TIM5_IRQHandler                   /* TIM5                         */
  .word     SPI3_IRQHandler                   /* SPI3                         */
  .word     UART4_IRQHandler                  /* UART4                        */
  .word     UART5_IRQHandler                  /* UART5                        */
  .word     TIM6_DAC_IRQHandler               /* TIM6 and DAC1&2 underrun errors */
  .word     TIM7_IRQHandler                   /* TIM7                         */
  .word     DMA2_Channel1_IRQHandler          /* DMA2 Channel 1               */
  .word     DMA2_Channel2_IRQHandler          /* DMA2 Channel 2               */
  .word     DMA2_Channel3_IRQHandler          /* DMA2 Channel 3               */
  .word     DMA2_Channel4_IRQHandler          /* DMA2 Channel 4               */
  .word     DMA2_Channel5_IRQHandler          /* DMA2 Channel 5               */
  .word     DFSDM1_FLT0_IRQHandler            /* Digital filter 0 for sigma delta modulator */
  .word     DFSDM1_FLT1_IRQHandler            /* Digital filter 1 for sigma delta modulator */
  .word     DFSDM1_FLT2_IRQHandler            /* Digital filter 2 for sigma delta modulator */
  .word     COMP_IRQHandler                   /* Comporator thru EXTI line    */
  .word     LPTIM1_IRQHandler                 /* Low power timer 1            */
  .word     LPTIM2_IRQHandler                 /* Low power timer 2            */
  .word     OTG_FS_IRQHandler                 /* USB OTG FS                   */
  .word     DMA2_Channel6_IRQHandler          /* DMA2 Channel 6               */
  .word     DMA2_Channel7_IRQHandler          /* DMA2 Channel 7               */
  .word     LPUART1_IRQHandler                /* Low power UART               */
  .word     QUADSPI_IRQHandler                /* Quad SPI                     */
  .word     I2C3_EV_IRQHandler                /* I2C3 event                   */
  .word     I2C3_ER_IRQHandler                /* I2C3 error                   */
  .word     SAI1_IRQHandler                   /* Serial audio interface 1     */
  .word     SAI2_IRQHandler                   /* Serial audio interface 2     */
  .word     SWPMI1_IRQHandler                 /* Single wire protocole 1      */
  .word     TSC_IRQHandler                    /* Touch sensig controller      */
  .word     LCD_IRQHandler                    /* LCD                          */
  .word     0                                 /* CRYP crypto                  */
  .word     RNG_IRQHandler                    /* Random number generator      */
  .word     FPU_IRQHandler                    /* FPU                          */
  /* Following Handlers are only used on L496/4A6xx devices */
  .word     CRS_IRQHandler                    /* HASH and CRS interrupt       */
  .word     I2C4_EV_IRQHandler                /* I2C4 event interrupt         */
  .word     I2C4_ER_IRQHandler                /* I2C4 error interrupt         */
  .word     DCMI_IRQHandler                   /* DCMI global interrupt        */
  .word     CAN2_TX_IRQHandler                /* CAN2 TX interrupt            */
  .word     CAN2_RX0_IRQHandler               /* CAN2 RX0 interrupt           */
  .word     CAN2_RX1_IRQHandler               /* CAN2 RX1 interrupt           */
  .word     CAN2_SCE_IRQHandler               /* CAN SCE interrupt            */
  .word     DMA2D_IRQHandler                  /* DMA2D global interrupt       */

/*******************************************************************************
*
* 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_PVM_IRQHandler
   .thumb_set PVD_PVM_IRQHandler,Default_Handler

   .weak      TAMP_STAMP_IRQHandler
   .thumb_set TAMP_STAMP_IRQHandler,Default_Handler

   .weak      RTC_WKUP_IRQHandler
   .thumb_set RTC_WKUP_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      CAN1_TX_IRQHandler
   .thumb_set CAN1_TX_IRQHandler,Default_Handler

   .weak      CAN1_RX0_IRQHandler
   .thumb_set 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_TIM15_IRQHandler
   .thumb_set TIM1_BRK_TIM15_IRQHandler,Default_Handler

   .weak      TIM1_UP_TIM16_IRQHandler
   .thumb_set TIM1_UP_TIM16_IRQHandler,Default_Handler

   .weak      TIM1_TRG_COM_TIM17_IRQHandler
   .thumb_set TIM1_TRG_COM_TIM17_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      DFSDM1_FLT3_IRQHandler
   .thumb_set DFSDM1_FLT3_IRQHandler,Default_Handler

   .weak      TIM8_BRK_IRQHandler
   .thumb_set TIM8_BRK_IRQHandler,Default_Handler

   .weak      TIM8_UP_IRQHandler
   .thumb_set TIM8_UP_IRQHandler,Default_Handler

   .weak      TIM8_TRG_COM_IRQHandler
   .thumb_set TIM8_TRG_COM_IRQHandler,Default_Handler

   .weak      TIM8_CC_IRQHandler
   .thumb_set TIM8_CC_IRQHandler,Default_Handler

   .weak      ADC3_IRQHandler
   .thumb_set ADC3_IRQHandler,Default_Handler

   .weak      FMC_IRQHandler
   .thumb_set FMC_IRQHandler,Default_Handler

   .weak      SDMMC1_IRQHandler
   .thumb_set SDMMC1_IRQHandler,Default_Handler

   .weak      TIM5_IRQHandler
   .thumb_set TIM5_IRQHandler,Default_Handler

   .weak      SPI3_IRQHandler
   .thumb_set SPI3_IRQHandler,Default_Handler

   .weak      UART4_IRQHandler
   .thumb_set UART4_IRQHandler,Default_Handler

   .weak      UART5_IRQHandler
   .thumb_set UART5_IRQHandler,Default_Handler

   .weak      TIM6_DAC_IRQHandler
   .thumb_set TIM6_DAC_IRQHandler,Default_Handler

   .weak      TIM7_IRQHandler
   .thumb_set TIM7_IRQHandler,Default_Handler

   .weak      DMA2_Channel1_IRQHandler
   .thumb_set DMA2_Channel1_IRQHandler,Default_Handler

   .weak      DMA2_Channel2_IRQHandler
   .thumb_set DMA2_Channel2_IRQHandler,Default_Handler

   .weak      DMA2_Channel3_IRQHandler
   .thumb_set DMA2_Channel3_IRQHandler,Default_Handler

   .weak      DMA2_Channel4_IRQHandler
   .thumb_set DMA2_Channel4_IRQHandler,Default_Handler

   .weak      DMA2_Channel5_IRQHandler
   .thumb_set DMA2_Channel5_IRQHandler,Default_Handler

   .weak      DFSDM1_FLT0_IRQHandler
   .thumb_set DFSDM1_FLT0_IRQHandler,Default_Handler

   .weak      DFSDM1_FLT1_IRQHandler
   .thumb_set DFSDM1_FLT1_IRQHandler,Default_Handler

   .weak      DFSDM1_FLT2_IRQHandler
   .thumb_set DFSDM1_FLT2_IRQHandler,Default_Handler

   .weak      COMP_IRQHandler
   .thumb_set COMP_IRQHandler,Default_Handler

   .weak      LPTIM1_IRQHandler
   .thumb_set LPTIM1_IRQHandler,Default_Handler

   .weak      LPTIM2_IRQHandler
   .thumb_set LPTIM2_IRQHandler,Default_Handler

   .weak      OTG_FS_IRQHandler
   .thumb_set OTG_FS_IRQHandler,Default_Handler

   .weak      DMA2_Channel6_IRQHandler
   .thumb_set DMA2_Channel6_IRQHandler,Default_Handler

   .weak      DMA2_Channel7_IRQHandler
   .thumb_set DMA2_Channel7_IRQHandler,Default_Handler

   .weak      LPUART1_IRQHandler
   .thumb_set LPUART1_IRQHandler,Default_Handler

   .weak      QUADSPI_IRQHandler
   .thumb_set QUADSPI_IRQHandler,Default_Handler

   .weak      I2C3_EV_IRQHandler
   .thumb_set I2C3_EV_IRQHandler,Default_Handler

   .weak      I2C3_ER_IRQHandler
   .thumb_set I2C3_ER_IRQHandler,Default_Handler

   .weak      SAI1_IRQHandler
   .thumb_set SAI1_IRQHandler,Default_Handler

   .weak      SAI2_IRQHandler
   .thumb_set SAI2_IRQHandler,Default_Handler

   .weak      SWPMI1_IRQHandler
   .thumb_set SWPMI1_IRQHandler,Default_Handler

   .weak      TSC_IRQHandler
   .thumb_set TSC_IRQHandler,Default_Handler

   .weak      LCD_IRQHandler
   .thumb_set LCD_IRQHandler,Default_Handler

   .weak      RNG_IRQHandler
   .thumb_set RNG_IRQHandler,Default_Handler

   .weak      FPU_IRQHandler
   .thumb_set FPU_IRQHandler,Default_Handler

   .weak      CRS_IRQHandler
   .thumb_set CRS_IRQHandler,Default_Handler

   .weak      I2C4_EV_IRQHandler
   .thumb_set I2C4_EV_IRQHandler,Default_Handler

   .weak      I2C4_ER_IRQHandler
   .thumb_set I2C4_ER_IRQHandler,Default_Handler

   .weak      DCMI_IRQHandler
   .thumb_set DCMI_IRQHandler,Default_Handler

   .weak      CAN2_TX_IRQHandler
   .thumb_set CAN2_TX_IRQHandler,Default_Handler

   .weak      CAN2_RX0_IRQHandler
   .thumb_set CAN2_RX0_IRQHandler,Default_Handler

   .weak      CAN2_RX1_IRQHandler
   .thumb_set CAN2_RX1_IRQHandler,Default_Handler

   .weak      CAN2_SCE_IRQHandler
   .thumb_set CAN2_SCE_IRQHandler,Default_Handler

   .weak      DMA2D_IRQHandler
   .thumb_set DMA2D_IRQHandler,Default_Handler
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/