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fix(core): fix nmi handling

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This commit is contained in:
cepetr 2025-07-08 17:07:32 +02:00 committed by cepetr
parent 4754fd8e34
commit 64c22a8e65
1 changed files with 39 additions and 7 deletions
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42
core/embed/sys/task/stm32/systask.c
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@ -803,16 +803,48 @@ __attribute__((naked, no_stack_protector)) void GTZC_IRQHandler(void) {
} }
#endif #endif
__attribute__((no_stack_protector, used)) static void nmi_handler( __attribute__((no_stack_protector, used)) static void nmi_handler(void) {
uint32_t msp, uint32_t exc_return) { mpu_mode_t mpu_mode = mpu_reconfig(MPU_MODE_DEFAULT);
mpu_reconfig(MPU_MODE_DEFAULT);
// Clear pending Clock security interrupt flag
#ifdef STM32U5 #ifdef STM32U5
if ((RCC->CIFR & RCC_CIFR_CSSF) != 0) {
RCC->CICR = RCC_CICR_CSSC; RCC->CICR = RCC_CICR_CSSC;
#else #else
if ((RCC->CIR & RCC_CIR_CSSF) != 0) {
RCC->CIR = RCC_CIR_CSSC; RCC->CIR = RCC_CIR_CSSC;
#endif #endif
systask_exit_fault(msp, exc_return); // Clock Security System triggered NMI
systask_exit_fault(true, __get_MSP());
}
#ifdef STM32U5
else if (FLASH->ECCR & FLASH_ECCR_ECCD_Msk) {
// FLASH ECC double error
uint32_t addr = FLASH->ECCR & FLASH_ECCR_ADDR_ECC_Msk;
uint32_t bankid =
(FLASH->ECCR & FLASH_ECCR_BK_ECC_Msk) >> FLASH_ECCR_BK_ECC_Pos;
#if defined(BOARDLOADER)
// In boardloader, this is a fatal error only if the address
// is in the bootloader code region.
if (bankid == 0 && addr >= BOARDLOADER_START &&
addr < BOARDLOADER_START + BOARDLOADER_MAXSIZE) {
systask_exit_fault(false, __get_MSP());
}
#elif defined(BOOTLOADER)
// In bootloader, this is a fatal error only if the address
// is in the bootloader code region.
if (bankid == 0 && addr >= BOOTLOADER_START &&
addr < BOOTLOADER_START + BOOTLOADER_MAXSIZE) {
systask_exit_fault(false, __get_MSP());
}
#else
(void)addr;
(void)bankid;
// In application/prodtest this is a fatal error
systask_exit_fault(false, __get_MSP());
#endif
}
#endif // STM32U5
mpu_restore(mpu_mode);
} }
__attribute__((no_stack_protector)) void NMI_Handler(void) { __attribute__((no_stack_protector)) void NMI_Handler(void) {