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stm32/mpu: Save and restore the IRQ state when configuring MPU. 

In case IRQs are already disabled during the MPU configuration.

Fixes issue #5152.
pull/1/head
Damien George 2019-10-16 23:12:06 +11:00
parent 5954387858
commit 4f2c737b0c
3 changed files with 10 additions and 10 deletions
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4
ports/stm32/eth.c
View File

@ -153,9 +153,9 @@ void eth_set_trace(eth_t *self, uint32_t value) {
STATIC int eth_mac_init(eth_t *self) {
// Configure MPU
mpu_config_start();
uint32_t irq_state = mpu_config_start();
mpu_config_region(MPU_REGION_ETH, (uint32_t)&eth_dma, MPU_CONFIG_ETH(MPU_REGION_SIZE_16KB));
mpu_config_end();
mpu_config_end(irq_state);
// Configure GPIO
mp_hal_pin_config_alt_static(MICROPY_HW_ETH_MDC, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_NONE, STATIC_AF_ETH_MDC);

8
ports/stm32/mpu.h
View File

@ -78,8 +78,8 @@ static inline void mpu_init(void) {
__ISB();
}
static inline void mpu_config_start(void) {
__disable_irq();
static inline uint32_t mpu_config_start(void) {
return disable_irq();
}
static inline void mpu_config_region(uint32_t region, uint32_t base_addr, uint32_t attr_size) {
@ -88,11 +88,11 @@ static inline void mpu_config_region(uint32_t region, uint32_t base_addr, uint32
MPU->RASR = attr_size;
}
static inline void mpu_config_end(void) {
static inline void mpu_config_end(uint32_t irq_state) {
__ISB();
__DSB();
__DMB();
__enable_irq();
enable_irq(irq_state);
}
#else

8
ports/stm32/qspi.c
View File

@ -55,9 +55,9 @@
static inline void qspi_mpu_disable_all(void) {
// Configure MPU to disable access to entire QSPI region, to prevent CPU
// speculative execution from accessing this region and modifying QSPI registers.
mpu_config_start();
uint32_t irq_state = mpu_config_start();
mpu_config_region(MPU_REGION_QSPI1, QSPI_MAP_ADDR, MPU_CONFIG_DISABLE(0x00, MPU_REGION_SIZE_256MB));
mpu_config_end();
mpu_config_end(irq_state);
}
static inline void qspi_mpu_enable_mapped(void) {
@ -67,11 +67,11 @@ static inline void qspi_mpu_enable_mapped(void) {
// to everything except the valid address space, using holes in the bottom
// of the regions and nesting them.
// At the moment this is hard-coded to 2MiB of QSPI address space.
mpu_config_start();
uint32_t irq_state = mpu_config_start();
mpu_config_region(MPU_REGION_QSPI1, QSPI_MAP_ADDR, MPU_CONFIG_DISABLE(0x01, MPU_REGION_SIZE_256MB));
mpu_config_region(MPU_REGION_QSPI2, QSPI_MAP_ADDR, MPU_CONFIG_DISABLE(0x0f, MPU_REGION_SIZE_32MB));
mpu_config_region(MPU_REGION_QSPI3, QSPI_MAP_ADDR, MPU_CONFIG_DISABLE(0x01, MPU_REGION_SIZE_16MB));
mpu_config_end();
mpu_config_end(irq_state);
}
void qspi_init(void) {