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Merge pull request #12336 from SeppoTakalo/disable_writebuf 

Disable write buffering on debug builds.
pull/12354/head
Kevin Bracey 2020-01-31 16:24:04 +02:00 committed by GitHub
parent 370a936147 c352488412
commit d063902ee8
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 20 additions and 11 deletions
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11
platform/source/mbed_application.c
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@ -71,17 +71,6 @@ void mbed_start_application(uintptr_t address)
powerdown_scb(address);
mbed_mpu_manager_deinit();
#ifdef MBED_DEBUG
// Configs to make debugging easier
#ifdef SCnSCB_ACTLR_DISDEFWBUF_Msk
// Disable write buffer to make BusFaults (eg write to ROM via NULL pointer) precise.
// Possible on Cortex-M3 and M4, not on M0, M7 or M33.
// Would be less necessary if ROM was write-protected in MPU to give a
// precise MemManage exception.
SCnSCB->ACTLR |= SCnSCB_ACTLR_DISDEFWBUF_Msk;
#endif
#endif
sp = *((void **)address + 0);
pc = *((void **)address + 1);
start_new_application(sp, pc);

10
platform/source/mbed_sdk_boot.c
View File

@ -77,6 +77,16 @@ void mbed_copy_nvic(void)
void mbed_init(void)
{
#ifdef MBED_DEBUG
// Configs to make debugging easier
#ifdef SCnSCB_ACTLR_DISDEFWBUF_Msk
// Disable write buffer to make BusFaults (eg write to ROM via NULL pointer) precise.
// Possible on Cortex-M3 and M4, not on M0, M7 or M33.
// Would be less necessary if ROM was write-protected in MPU to give a
// precise MemManage exception.
SCnSCB->ACTLR |= SCnSCB_ACTLR_DISDEFWBUF_Msk;
#endif
#endif
mbed_copy_nvic();
mbed_sdk_init();
#if DEVICE_USTICKER && MBED_CONF_TARGET_INIT_US_TICKER_AT_BOOT

10
rtos/source/TARGET_CORTEX/mbed_boot.c
View File

@ -73,6 +73,16 @@ uint32_t mbed_stack_isr_size = 0;
void mbed_init(void)
{
#ifdef MBED_DEBUG
// Configs to make debugging easier
#ifdef SCnSCB_ACTLR_DISDEFWBUF_Msk
// Disable write buffer to make BusFaults (eg write to ROM via NULL pointer) precise.
// Possible on Cortex-M3 and M4, not on M0, M7 or M33.
// Would be less necessary if ROM was write-protected in MPU to give a
// precise MemManage exception.
SCnSCB->ACTLR |= SCnSCB_ACTLR_DISDEFWBUF_Msk;
#endif
#endif
mbed_mpu_manager_init();
mbed_cpy_nvic();
mbed_sdk_init();