mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-12 04:40:58 +00:00
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
// Copyright 2023 Nick Brassel (@tzarc)
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// BEGIN: STM32 EFL Wear-leveling ECC fault handling
|
|
//
|
|
// Some STM32s have ECC checks for all flash memory access. Whenever there's an
|
|
// ECC failure, the MCU raises the NMI interrupt. Whenever we receive such an
|
|
// interrupt whilst reading the wear-leveling EEPROM area, we gracefully cater
|
|
// for it, signalling the wear-leveling code that a failure has occurred.
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <ch.h>
|
|
#include <chcore.h>
|
|
|
|
#ifdef WEAR_LEVELING_EMBEDDED_FLASH
|
|
# ifdef QMK_MCU_SERIES_STM32L4XX
|
|
# define ECC_ERRORS_TRIGGER_NMI_INTERRUPT
|
|
# define ECC_CHECK_REGISTER FLASH->ECCR
|
|
# define ECC_CHECK_FLAG FLASH_ECCR_ECCD
|
|
# endif // QMK_MCU_SERIES_STM32L4XX
|
|
#endif // WEAR_LEVELING_EMBEDDED_FLASH
|
|
|
|
#ifdef ECC_ERRORS_TRIGGER_NMI_INTERRUPT
|
|
|
|
extern bool backing_store_allow_ecc_errors(void);
|
|
extern void backing_store_signal_ecc_error(void);
|
|
|
|
void NMI_Handler(void) {
|
|
if ((ECC_CHECK_REGISTER) & (ECC_CHECK_FLAG)) {
|
|
if (backing_store_allow_ecc_errors()) {
|
|
(ECC_CHECK_REGISTER) = (ECC_CHECK_FLAG);
|
|
backing_store_signal_ecc_error();
|
|
return;
|
|
}
|
|
}
|
|
|
|
chSysHalt("NMI");
|
|
}
|
|
|
|
#endif // ECC_ERRORS_TRIGGER_NMI_INTERRUPT
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// END: STM32 EFL Wear-leveling ECC fault handling
|
|
///////////////////////////////////////////////////////////////////////////////
|