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428 lines
12 KiB
ArmAsm
428 lines
12 KiB
ArmAsm
/**
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******************************************************************************
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* @file startup_stm32f10x_md.s
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* @author MCD Application Team / Angus Peart
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* @version V3.1.2
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* @date 09/28/2009
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* @brief STM32F10x Medium Density Devices vector table for RIDE7 toolchain.
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* This module performs:
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* - Set the initial SP
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* - Set the initial PC == Reset_Handler,
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* - Set the vector table entries with the exceptions ISR address
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* - Branches to main in the C library (which eventually
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* calls main()).
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* After Reset the Cortex-M3 processor is in Thread mode,
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* priority is Privileged, and the Stack is set to Main.
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*******************************************************************************
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* @copy
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>
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*/
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.syntax unified
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.cpu cortex-m3
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.fpu softvfp
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.thumb
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.global g_pfnVectors
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.global Default_Handler
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.global xPortIncreaseHeapSize
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.global Stack_Change
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/* start address for the initialization values of the .data section.
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defined in linker script */
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.word _sidata
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/* start address for the .data section. defined in linker script */
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.word _sdata
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/* end address for the .data section. defined in linker script */
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.word _edata
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/* start address for the .bss section. defined in linker script */
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.word _sbss
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/* end address for the .bss section. defined in linker script */
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.word _ebss
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.equ BootRAM, 0xF108F85F
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/**
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* @brief This is the code that gets called when the processor first
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* starts execution following a reset event. Only the absolutely
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* necessary set is performed, after which the application
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* supplied main() routine is called.
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* @param None
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* @retval : None
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*/
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.section .text.Reset_Handler
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.weak Reset_Handler
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.type Reset_Handler, %function
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Reset_Handler:
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/*
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* From COrtex-M3 reference manual:
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* - Handler IRQ always use SP_main
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* - Process use SP_main or SP_process
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* Here, we will use beginning of SRAM for IRQ (SP_main)
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* and end of heap for initialization (SP_process).
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* Once the schedule starts, all threads will use their own stack
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* from heap and NOBOBY should use SP_process again.
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*/
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/* Do set/reset the stack pointers */
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LDR r0, =_irq_stack_top
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MSR msp, r0
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LDR r2, =_init_stack_top
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MSR psp, r2
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/* check if irq and init stack are the same */
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/* if they are, we don't do stack swap */
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/* and lets bypass the monitoring as well for now */
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cmp r0, r2
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beq SectionBssInit
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/* DO
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* - stay in thread process mode
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* - stay in privilege level
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* - use process stack
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*/
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movs r0, #2
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MSR control, r0
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ISB
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/* Fill IRQ stack for watermark monitoring */
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ldr r2, =_irq_stack_end
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b LoopFillIRQStack
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FillIRQStack:
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movw r3, #0xA5A5
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str r3, [r2], #4
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LoopFillIRQStack:
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ldr r3, = _irq_stack_top
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cmp r2, r3
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bcc FillIRQStack
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SectionBssInit:
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/* Copy the data segment initializers from flash to SRAM */
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movs r1, #0
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b LoopCopyDataInit
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CopyDataInit:
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ldr r3, =_sidata
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ldr r3, [r3, r1]
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str r3, [r0, r1]
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adds r1, r1, #4
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LoopCopyDataInit:
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ldr r0, =_sdata
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ldr r3, =_edata
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adds r2, r0, r1
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cmp r2, r3
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bcc CopyDataInit
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ldr r2, =_sbss
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b LoopFillZerobss
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/* Zero fill the bss segment. */
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FillZerobss:
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movs r3, #0
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str r3, [r2], #4
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LoopFillZerobss:
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ldr r3, = _ebss
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cmp r2, r3
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bcc FillZerobss
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/* Call the application's entry point.*/
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bl main
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/* will never return here */
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bx lr
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.size Reset_Handler, .-Reset_Handler
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/**
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* @brief This is the code that swaps stack (from end of heap to irq_stack).
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* Also reclaim the heap that was used as a stack.
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* @param None
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* @retval : None
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*/
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.section .text.Stack_Change
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.weak Stack_Change
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.type Stack_Change, %function
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Stack_Change:
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mov r4, lr
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/* Switches stack back momentarily to MSP */
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movs r0, #0
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msr control, r0
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Heap_Reclaim:
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/* add heap_post_rtos to the heap (if the capability/function exist) */
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/* Also claim the unused memory (between end of heap to end of memory */
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/* CAREFULL: the heap section must be the last section in RAM in order this to work */
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ldr r0, = _init_stack_size
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ldr r1, = _eheap_post_rtos
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ldr r2, = _eram
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subs r2, r2, r1
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adds r0, r0, r2
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bl xPortIncreaseHeapSize
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bx r4
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.size Stack_Change, .-Stack_Change
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/**
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* @brief This is the code that gets called when the processor receives an
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* unexpected interrupt. This simply enters an infinite loop, preserving
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* the system state for examination by a debugger.
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*
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* @param None
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* @retval : None
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*/
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.section .text.Default_Handler,"ax",%progbits
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Default_Handler:
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Infinite_Loop:
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b Infinite_Loop
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.size Default_Handler, .-Default_Handler
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/******************************************************************************
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*
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* The minimal vector table for a Cortex M3. Note that the proper constructs
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* must be placed on this to ensure that it ends up at physical address
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* 0x0000.0000.
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*
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******************************************************************************/
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.section .isr_vector,"a",%progbits
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.type g_pfnVectors, %object
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.size g_pfnVectors, .-g_pfnVectors
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g_pfnVectors:
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.word _irq_stack_top
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.word Reset_Handler
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.word NMI_Handler
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.word HardFault_Handler
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.word MemManage_Handler
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.word BusFault_Handler
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.word UsageFault_Handler
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.word 0
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.word 0
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.word 0
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.word 0
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.word vPortSVCHandler
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.word DebugMon_Handler
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.word 0
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.word xPortPendSVHandler
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.word xPortSysTickHandler
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.word WWDG_IRQHandler
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.word PVD_IRQHandler
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.word TAMPER_IRQHandler
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.word RTC_IRQHandler
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.word FLASH_IRQHandler
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.word RCC_IRQHandler
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.word EXTI0_IRQHandler
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.word EXTI1_IRQHandler
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.word EXTI2_IRQHandler
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.word EXTI3_IRQHandler
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.word EXTI4_IRQHandler
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.word DMA1_Channel1_IRQHandler
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.word DMA1_Channel2_IRQHandler
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.word DMA1_Channel3_IRQHandler
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.word DMA1_Channel4_IRQHandler
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.word DMA1_Channel5_IRQHandler
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.word DMA1_Channel6_IRQHandler
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.word DMA1_Channel7_IRQHandler
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.word ADC1_2_IRQHandler
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.word USB_HP_CAN1_TX_IRQHandler
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.word USB_LP_CAN1_RX0_IRQHandler
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.word CAN1_RX1_IRQHandler
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.word CAN1_SCE_IRQHandler
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.word EXTI9_5_IRQHandler
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.word TIM1_BRK_IRQHandler
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.word TIM1_UP_IRQHandler
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.word TIM1_TRG_COM_IRQHandler
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.word TIM1_CC_IRQHandler
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.word TIM2_IRQHandler
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.word TIM3_IRQHandler
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.word TIM4_IRQHandler
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.word I2C1_EV_IRQHandler
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.word I2C1_ER_IRQHandler
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.word I2C2_EV_IRQHandler
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.word I2C2_ER_IRQHandler
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.word SPI1_IRQHandler
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.word SPI2_IRQHandler
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.word USART1_IRQHandler
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.word USART2_IRQHandler
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.word USART3_IRQHandler
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.word EXTI15_10_IRQHandler
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.word RTCAlarm_IRQHandler
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.word USBWakeUp_IRQHandler
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word 0
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.word BootRAM /* @0x108. This is for boot in RAM mode for
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STM32F10x Medium Density devices. */
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/*******************************************************************************
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*
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* Provide weak aliases for each Exception handler to the Default_Handler.
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* As they are weak aliases, any function with the same name will override
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* this definition.
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*
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*******************************************************************************/
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.weak NMI_Handler
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.thumb_set NMI_Handler,Default_Handler
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.weak HardFault_Handler
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.thumb_set HardFault_Handler,Default_Handler
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.weak MemManage_Handler
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.thumb_set MemManage_Handler,Default_Handler
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.weak BusFault_Handler
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.thumb_set BusFault_Handler,Default_Handler
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.weak UsageFault_Handler
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.thumb_set UsageFault_Handler,Default_Handler
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.weak SVC_Handler
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.thumb_set SVC_Handler,Default_Handler
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.weak DebugMon_Handler
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.thumb_set DebugMon_Handler,Default_Handler
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.weak PendSV_Handler
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.thumb_set PendSV_Handler,Default_Handler
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.weak SysTick_Handler
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.thumb_set SysTick_Handler,Default_Handler
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.weak WWDG_IRQHandler
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.thumb_set WWDG_IRQHandler,Default_Handler
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.weak PVD_IRQHandler
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.thumb_set PVD_IRQHandler,Default_Handler
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.weak TAMPER_IRQHandler
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.thumb_set TAMPER_IRQHandler,Default_Handler
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.weak RTC_IRQHandler
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.thumb_set RTC_IRQHandler,Default_Handler
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.weak FLASH_IRQHandler
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.thumb_set FLASH_IRQHandler,Default_Handler
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.weak RCC_IRQHandler
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.thumb_set RCC_IRQHandler,Default_Handler
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.weak EXTI0_IRQHandler
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.thumb_set EXTI0_IRQHandler,Default_Handler
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.weak EXTI1_IRQHandler
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.thumb_set EXTI1_IRQHandler,Default_Handler
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.weak EXTI2_IRQHandler
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.thumb_set EXTI2_IRQHandler,Default_Handler
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.weak EXTI3_IRQHandler
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.thumb_set EXTI3_IRQHandler,Default_Handler
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.weak EXTI4_IRQHandler
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.thumb_set EXTI4_IRQHandler,Default_Handler
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.weak DMA1_Channel1_IRQHandler
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.thumb_set DMA1_Channel1_IRQHandler,Default_Handler
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.weak DMA1_Channel2_IRQHandler
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.thumb_set DMA1_Channel2_IRQHandler,Default_Handler
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.weak DMA1_Channel3_IRQHandler
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.thumb_set DMA1_Channel3_IRQHandler,Default_Handler
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.weak DMA1_Channel4_IRQHandler
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.thumb_set DMA1_Channel4_IRQHandler,Default_Handler
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.weak DMA1_Channel5_IRQHandler
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.thumb_set DMA1_Channel5_IRQHandler,Default_Handler
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.weak DMA1_Channel6_IRQHandler
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.thumb_set DMA1_Channel6_IRQHandler,Default_Handler
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.weak DMA1_Channel7_IRQHandler
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.thumb_set DMA1_Channel7_IRQHandler,Default_Handler
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.weak ADC1_2_IRQHandler
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.thumb_set ADC1_2_IRQHandler,Default_Handler
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.weak USB_HP_CAN1_TX_IRQHandler
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.thumb_set USB_HP_CAN1_TX_IRQHandler,Default_Handler
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.weak USB_LP_CAN1_RX0_IRQHandler
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.thumb_set USB_LP_CAN1_RX0_IRQHandler,Default_Handler
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.weak CAN1_RX1_IRQHandler
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.thumb_set CAN1_RX1_IRQHandler,Default_Handler
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.weak CAN1_SCE_IRQHandler
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.thumb_set CAN1_SCE_IRQHandler,Default_Handler
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.weak EXTI9_5_IRQHandler
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.thumb_set EXTI9_5_IRQHandler,Default_Handler
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.weak TIM1_BRK_IRQHandler
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.thumb_set TIM1_BRK_IRQHandler,Default_Handler
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.weak TIM1_UP_IRQHandler
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.thumb_set TIM1_UP_IRQHandler,Default_Handler
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.weak TIM1_TRG_COM_IRQHandler
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.thumb_set TIM1_TRG_COM_IRQHandler,Default_Handler
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.weak TIM1_CC_IRQHandler
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.thumb_set TIM1_CC_IRQHandler,Default_Handler
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.weak TIM2_IRQHandler
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.thumb_set TIM2_IRQHandler,Default_Handler
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.weak TIM3_IRQHandler
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.thumb_set TIM3_IRQHandler,Default_Handler
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.weak TIM4_IRQHandler
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.thumb_set TIM4_IRQHandler,Default_Handler
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.weak I2C1_EV_IRQHandler
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.thumb_set I2C1_EV_IRQHandler,Default_Handler
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.weak I2C1_ER_IRQHandler
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.thumb_set I2C1_ER_IRQHandler,Default_Handler
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.weak I2C2_EV_IRQHandler
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.thumb_set I2C2_EV_IRQHandler,Default_Handler
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.weak I2C2_ER_IRQHandler
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.thumb_set I2C2_ER_IRQHandler,Default_Handler
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.weak SPI1_IRQHandler
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.thumb_set SPI1_IRQHandler,Default_Handler
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.weak SPI2_IRQHandler
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.thumb_set SPI2_IRQHandler,Default_Handler
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.weak USART1_IRQHandler
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.thumb_set USART1_IRQHandler,Default_Handler
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.weak USART2_IRQHandler
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.thumb_set USART2_IRQHandler,Default_Handler
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.weak USART3_IRQHandler
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.thumb_set USART3_IRQHandler,Default_Handler
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.weak EXTI15_10_IRQHandler
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.thumb_set EXTI15_10_IRQHandler,Default_Handler
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.weak RTCAlarm_IRQHandler
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.thumb_set RTCAlarm_IRQHandler,Default_Handler
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.weak USBWakeUp_IRQHandler
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.thumb_set USBWakeUp_IRQHandler,Default_Handler
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