[参考译文] TMS570LC4357：使用 SDL 和安全 RTOS 时发生数据中止

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https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1263437/tms570lc4357-data-abort-while-using-sdl-and-safe-rtos

器件型号：TMS570LC4357

您好！

我已经努力处理数据中止问题了几天。我们已经使用 SafeRTOS 实现了 SDL (safeTI 诊断库)。

执行 portRESTORE_context 代码将进入数据中止函数、

_vPortSVC_start_first:
LDMFD SP!, {R4, R5, LR} ; Pop registers to keep stack pointer correct.
portRESTORE_CONTEXT



void vDataAbort( void )
{
volatile portUInt32Type ulDataFaultStatusReg;
volatile portUInt32Type ulDataFaultAddressReg;

ulDataFaultStatusReg = ulGetDataFaultStatusRegister();   <----  value of ulDataFaultStatusReg is 0x1C06
ulDataFaultAddressReg = ulGetDataFaultAddressRegister(); <----- value of ulDataFaultAddressReg is 0

for( ;; )
{
prvAbortDelay();    <-- enter here
}
}

以下是 link.cmd 文件

MEMORY
{

VECTORS (X) : origin=0x00000000 length=0x00000080 vfill = 0xffffffff
KERN_FUNC (RX) : origin=0x00000080 length=0x0000ff80 vfill = 0xffffffff
FLASH0 (RX) : origin=0x00010000 length=0x001F0000 vfill = 0xffffffff
STACKS (RW) : origin=0x08000000 length=0x00003000
KERN_DATA (RW) : origin=0x08003000 length=0x00002000

HIGH_HANDLER (RWX) : origin=0x08005000 length=0x00001000
RAM (RW) : origin=0x08006000 length=0x0007A000

FEE (R) : origin=0xF0200000 length=0x00000064 fill=0xDEADBEEF /* For FEE testing, Valid only for sample application */

ECC_VEC (R) : origin=(0xf0400000 + (start(VECTORS) >> 3))
length=(size(VECTORS) >> 3)
ECC={algorithm=algoL2R5F021, input_range=VECTORS}

ECC_FLA0 (R) : origin=(0xf0400000 + (start(FLASH0) >> 3))
length=(size(FLASH0) >> 3)
ECC={algorithm=algoL2R5F021, input_range=FLASH0 }

}



SECTIONS
{

.intvecs palign(32), START( lnkStartFlashAddress ),START( lnkKernelFuncStartAddr )
fill =0xffffffff {} > VECTORS
.sl_stflash_SRAM : RUN = HIGH_HANDLER, LOAD = FLASH0, LOAD_START(ulHighHandlerLoadStart), LOAD_END(ulHighHandlerLoadEnd),
LOAD_SIZE(ulHighHandlerSize), RUN_START( ulHighHandlerStartAddr ), RUN_END( ulHighHandlerEndAddr )

.kernel_function END( lnkKernelFuncEndAddr ) :
{
*(KERNEL_FUNCTION)
} > KERN_FUNC

.unpriv_flash palign(32), END( lnkEndFlashAddress ) :
{
*(.text)
*(.const)
} > FLASH0

.cinit align(32) : {} > KERN_FUNC
.pinit align(32) : {} > KERN_FUNC

.STACK_DATA_svc : {. += 1024;} > STACKS, RUN_START(StackModeSVC)
.STACK_DATA_fiq : {. += 1024;} > STACKS, RUN_START(StackModeFIQ)
.STACK_DATA_irq : {. += 1024;} > STACKS, RUN_START(StackModeIRQ)
.STACK_DATA_abt : {. += 1024;} > STACKS, RUN_START(StackModeABT)
.STACK_DATA_und : {. += 1024;} > STACKS, RUN_START(StackModeUND)
.STACK_DATA_sys : {. += 1024;} > STACKS, RUN_START(StackModeSYS)

STACK_DATA START( lnkKernelDataStartAddr ) : {} > STACKS
KERNEL_DATA END( lnkKernelDataEndAddr ) : {} > KERN_DATA

.bss : {} > RAM
.data : {} > RAM
.sysmem : {} > RAM
LOG_DATA : > RAM //LOG
PROFILE_DATA : > RAM //PROFILE

__idle_hook_data__
: START( lnkIdleTaskDataStartAddr )
{} > RAM palign( 0x20 )

}

位于 hl_sys_intvecs.asm 中

.ref _c_int00
.ref vUndefAbort
.ref vSafeRTOSSVCHandler
.ref vPrefetchAbort
.ref vDataAbort
.ref phantomInterrupt
.def resetEntry

;-------------------------------------------------------------------------------
; interrupt vectors

resetEntry
b _c_int00
b vUndefAbort
b vSafeRTOSSVCHandler
b vPrefetchAbort
b vDataAbort
b phantomInterrupt
ldr pc,[pc,#-0x1b0]
ldr pc,[pc,#-0x1b0]

我们已经研究了在执行隔启动函数后,它将运行 portSTART_FIRST_TASK();

在该函数执行中、它将执行 portRESTORE_context 然后代码将进入数据中止状态。

请参阅并支持我们。

2 年多前