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LibrePilot/flight/PiOS/STM32F10x/startup_stm32f10x_MD_CC.S

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/**
******************************************************************************
* @file startup_stm32f10x_md.s
* @author MCD Application Team / Angus Peart
* @version V3.1.2
* @date 09/28/2009
* @brief STM32F10x Medium Density Devices vector table for RIDE7 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-M3 processor is in Thread mode,
* priority is Privileged, and the Stack is set to Main.
*******************************************************************************
* @copy
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
*/
.syntax unified
.cpu cortex-m3
.fpu softvfp
.thumb
.global g_pfnVectors
.global Default_Handler
OP-423 do the arch specific stuff (in reset vector) to hide this from portable code: - switch back to MSP stack before starting the scheduler so that the sheduler can use the IRQ stack (when/if needed). - call the C portable function in heap1 to claim some stack back (the number to claim is taken from linker file). - start the scheduler from reset vector (I move this here from main because it make sense to not go back to C (so that I don't need to copy the rolled stack in case the sheduler returns). This make it more clean. - Also I have added the call to the mem manager if sheduler return. that way, we don't reset indefinitely if memory runs out. We will go to this handler and figure things out (right now, it's just looping but at least not rebooting. Probably trap NMI would be better (later improvement). The part missing for this part is the weak attribute for the function in heap1.c so that we don't have to update everything with empty stub. I think the weak atrribute for C function called in assembly is arch dependent so I am not sure if this is possible (will look into it, maybe somebody outthere nows). Right now, it's heap1 dependent and won't work with heap2. I will clean that up the next couple of days. I did some test and it looks good. this is without init code re-organization so we don't free as much as we will be it's good starts. This compile with sim_posix (since it does not affect portable code) so this is really clean. I only tested this with CC. I will port it for OP when I will work on heap2.
2011-06-14 06:49:17 +02:00
.global xPortIncreaseHeapSize
.global Stack_Change
/* 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:
/*
* From COrtex-M3 reference manual:
* - Handler IRQ always use SP_main
* - Process use SP_main or SP_process
* Here, we will use beginning of SRAM for IRQ (SP_main)
* and end of heap for initialization (SP_process).
* Once the schedule starts, all threads will use their own stack
* from heap and NOBOBY should use SP_process again.
*/
/* Do set/reset the stack pointers */
LDR r0, =_irq_stack_top
MSR msp, r0
LDR r2, =_init_stack_top
MSR psp, r2
/* check if irq and init stack are the same */
/* if they are, we don't do stack swap */
/* and lets bypass the monitoring as well for now */
cmp r0, r2
beq SectionBssInit
/* DO
* - stay in thread process mode
* - stay in privilege level
* - use process stack
*/
movs r0, #2
MSR control, r0
ISB
/* Fill IRQ stack for watermark monitoring */
ldr r2, =_irq_stack_end
b LoopFillIRQStack
FillIRQStack:
movw r3, #0xA5A5
str r3, [r2], #4
LoopFillIRQStack:
ldr r3, = _irq_stack_top
cmp r2, r3
bcc FillIRQStack
SectionBssInit:
/* 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 application's entry point.*/
bl main
/* will never return here */
bx lr
.size Reset_Handler, .-Reset_Handler
/**
* @brief This is the code that swaps stack (from end of heap to irq_stack).
* Also reclaim the heap that was used as a stack.
* @param None
* @retval : None
*/
.section .text.Stack_Change
.weak Stack_Change
.type Stack_Change, %function
Stack_Change:
mov r4, lr
OP-423 do the arch specific stuff (in reset vector) to hide this from portable code: - switch back to MSP stack before starting the scheduler so that the sheduler can use the IRQ stack (when/if needed). - call the C portable function in heap1 to claim some stack back (the number to claim is taken from linker file). - start the scheduler from reset vector (I move this here from main because it make sense to not go back to C (so that I don't need to copy the rolled stack in case the sheduler returns). This make it more clean. - Also I have added the call to the mem manager if sheduler return. that way, we don't reset indefinitely if memory runs out. We will go to this handler and figure things out (right now, it's just looping but at least not rebooting. Probably trap NMI would be better (later improvement). The part missing for this part is the weak attribute for the function in heap1.c so that we don't have to update everything with empty stub. I think the weak atrribute for C function called in assembly is arch dependent so I am not sure if this is possible (will look into it, maybe somebody outthere nows). Right now, it's heap1 dependent and won't work with heap2. I will clean that up the next couple of days. I did some test and it looks good. this is without init code re-organization so we don't free as much as we will be it's good starts. This compile with sim_posix (since it does not affect portable code) so this is really clean. I only tested this with CC. I will port it for OP when I will work on heap2.
2011-06-14 06:49:17 +02:00
/* Switches stack back momentarily to MSP */
movs r0, #0
OP-423 do the arch specific stuff (in reset vector) to hide this from portable code: - switch back to MSP stack before starting the scheduler so that the sheduler can use the IRQ stack (when/if needed). - call the C portable function in heap1 to claim some stack back (the number to claim is taken from linker file). - start the scheduler from reset vector (I move this here from main because it make sense to not go back to C (so that I don't need to copy the rolled stack in case the sheduler returns). This make it more clean. - Also I have added the call to the mem manager if sheduler return. that way, we don't reset indefinitely if memory runs out. We will go to this handler and figure things out (right now, it's just looping but at least not rebooting. Probably trap NMI would be better (later improvement). The part missing for this part is the weak attribute for the function in heap1.c so that we don't have to update everything with empty stub. I think the weak atrribute for C function called in assembly is arch dependent so I am not sure if this is possible (will look into it, maybe somebody outthere nows). Right now, it's heap1 dependent and won't work with heap2. I will clean that up the next couple of days. I did some test and it looks good. this is without init code re-organization so we don't free as much as we will be it's good starts. This compile with sim_posix (since it does not affect portable code) so this is really clean. I only tested this with CC. I will port it for OP when I will work on heap2.
2011-06-14 06:49:17 +02:00
msr control, r0
Heap_Reclaim:
OP-423 do the arch specific stuff (in reset vector) to hide this from portable code: - switch back to MSP stack before starting the scheduler so that the sheduler can use the IRQ stack (when/if needed). - call the C portable function in heap1 to claim some stack back (the number to claim is taken from linker file). - start the scheduler from reset vector (I move this here from main because it make sense to not go back to C (so that I don't need to copy the rolled stack in case the sheduler returns). This make it more clean. - Also I have added the call to the mem manager if sheduler return. that way, we don't reset indefinitely if memory runs out. We will go to this handler and figure things out (right now, it's just looping but at least not rebooting. Probably trap NMI would be better (later improvement). The part missing for this part is the weak attribute for the function in heap1.c so that we don't have to update everything with empty stub. I think the weak atrribute for C function called in assembly is arch dependent so I am not sure if this is possible (will look into it, maybe somebody outthere nows). Right now, it's heap1 dependent and won't work with heap2. I will clean that up the next couple of days. I did some test and it looks good. this is without init code re-organization so we don't free as much as we will be it's good starts. This compile with sim_posix (since it does not affect portable code) so this is really clean. I only tested this with CC. I will port it for OP when I will work on heap2.
2011-06-14 06:49:17 +02:00
/* add heap_post_rtos to the heap (if the capability/function exist) */
/* Also claim the unused memory (between end of heap to end of memory */
/* CAREFULL: the heap section must be the last section in RAM in order this to work */
OP-423 do the arch specific stuff (in reset vector) to hide this from portable code: - switch back to MSP stack before starting the scheduler so that the sheduler can use the IRQ stack (when/if needed). - call the C portable function in heap1 to claim some stack back (the number to claim is taken from linker file). - start the scheduler from reset vector (I move this here from main because it make sense to not go back to C (so that I don't need to copy the rolled stack in case the sheduler returns). This make it more clean. - Also I have added the call to the mem manager if sheduler return. that way, we don't reset indefinitely if memory runs out. We will go to this handler and figure things out (right now, it's just looping but at least not rebooting. Probably trap NMI would be better (later improvement). The part missing for this part is the weak attribute for the function in heap1.c so that we don't have to update everything with empty stub. I think the weak atrribute for C function called in assembly is arch dependent so I am not sure if this is possible (will look into it, maybe somebody outthere nows). Right now, it's heap1 dependent and won't work with heap2. I will clean that up the next couple of days. I did some test and it looks good. this is without init code re-organization so we don't free as much as we will be it's good starts. This compile with sim_posix (since it does not affect portable code) so this is really clean. I only tested this with CC. I will port it for OP when I will work on heap2.
2011-06-14 06:49:17 +02:00
ldr r0, = _init_stack_size
ldr r1, = _eheap_post_rtos
ldr r2, = _eram
subs r2, r2, r1
adds r0, r0, r2
OP-423 do the arch specific stuff (in reset vector) to hide this from portable code: - switch back to MSP stack before starting the scheduler so that the sheduler can use the IRQ stack (when/if needed). - call the C portable function in heap1 to claim some stack back (the number to claim is taken from linker file). - start the scheduler from reset vector (I move this here from main because it make sense to not go back to C (so that I don't need to copy the rolled stack in case the sheduler returns). This make it more clean. - Also I have added the call to the mem manager if sheduler return. that way, we don't reset indefinitely if memory runs out. We will go to this handler and figure things out (right now, it's just looping but at least not rebooting. Probably trap NMI would be better (later improvement). The part missing for this part is the weak attribute for the function in heap1.c so that we don't have to update everything with empty stub. I think the weak atrribute for C function called in assembly is arch dependent so I am not sure if this is possible (will look into it, maybe somebody outthere nows). Right now, it's heap1 dependent and won't work with heap2. I will clean that up the next couple of days. I did some test and it looks good. this is without init code re-organization so we don't free as much as we will be it's good starts. This compile with sim_posix (since it does not affect portable code) so this is really clean. I only tested this with CC. I will port it for OP when I will work on heap2.
2011-06-14 06:49:17 +02:00
bl xPortIncreaseHeapSize
bx r4
.size Stack_Change, .-Stack_Change
/**
* @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 _irq_stack_top
.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 vPortSVCHandler
.word DebugMon_Handler
.word 0
.word xPortPendSVHandler
.word xPortSysTickHandler
.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 RTCAlarm_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 RTCAlarm_IRQHandler
.thumb_set RTCAlarm_IRQHandler,Default_Handler
.weak USBWakeUp_IRQHandler
.thumb_set USBWakeUp_IRQHandler,Default_Handler