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Kconfig: add config for low-priority debug mon isr

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Debug monitor needs to be configured to a low priority in order to be
useful for debugging (to prioritize other interrupts when waiting on a
breakpoint).
Added a config that configures the interrupt this way.

Signed-off-by: Piotr Jasiński <piotr.jasinski@nordicsemi.no>
This commit is contained in:
Piotr Jasiński 2022-11-22 08:29:03 +01:00 • committed by Carles Cufí
commit 7fa0af01cf
2 changed files with 10 additions and 2 deletions
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8
arch/arm/core/aarch32/cortex_m/Kconfig
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@ -352,7 +352,13 @@ config CORTEX_M_DWT
Enable and use the Data Watchpoint and Trace (DWT) unit for Enable and use the Data Watchpoint and Trace (DWT) unit for
timing functions. timing functions.
# Additional stack for tests when building with FPU_SHARING config CORTEX_M_DEBUG_MONITOR_HOOK
bool "Debug monitor interrupt for debugging"
depends on !ARMV6_M_ARMV8_M_BASELINE
help
Enable this option to configure debug monitor exception to low priority
for debugging purposes.
# enabled, which may increase ESF stacking requirements for # enabled, which may increase ESF stacking requirements for
# threads. # threads.
config TEST_EXTRA_STACK_SIZE config TEST_EXTRA_STACK_SIZE

4
arch/arm/include/aarch32/cortex_m/exc.h
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@ -112,7 +112,9 @@ static ALWAYS_INLINE void z_arm_exc_setup(void)
NVIC_SetPriority(MemoryManagement_IRQn, _EXC_FAULT_PRIO); NVIC_SetPriority(MemoryManagement_IRQn, _EXC_FAULT_PRIO);
NVIC_SetPriority(BusFault_IRQn, _EXC_FAULT_PRIO); NVIC_SetPriority(BusFault_IRQn, _EXC_FAULT_PRIO);
NVIC_SetPriority(UsageFault_IRQn, _EXC_FAULT_PRIO); NVIC_SetPriority(UsageFault_IRQn, _EXC_FAULT_PRIO);
#if defined(CONFIG_CPU_CORTEX_M_HAS_DWT) #if defined(CONFIG_CORTEX_M_DEBUG_MONITOR_HOOK)
NVIC_SetPriority(DebugMonitor_IRQn, IRQ_PRIO_LOWEST);
#elif defined(CONFIG_CPU_CORTEX_M_HAS_DWT)
NVIC_SetPriority(DebugMonitor_IRQn, _EXC_FAULT_PRIO); NVIC_SetPriority(DebugMonitor_IRQn, _EXC_FAULT_PRIO);
#endif #endif
#if defined(CONFIG_ARM_SECURE_FIRMWARE) #if defined(CONFIG_ARM_SECURE_FIRMWARE)