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arch: riscv: add an option for empty spurious interrupt handler

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Add the possibility to disable fault handling in spurious
interrupt handler on RISCs and replacce it with an infinite loop.

Signed-off-by: Magdalena Pastula <magdalena.pastula@nordicsemi.no>
This commit is contained in:
Magdalena Pastula 2024-06-21 16:06:03 +02:00 • committed by Anas Nashif
commit 0237d375de
2 changed files with 19 additions and 0 deletions
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12
arch/Kconfig
View file

@ -113,6 +113,7 @@ config RISCV
select ARCH_IS_SET select ARCH_IS_SET
select ARCH_SUPPORTS_COREDUMP select ARCH_SUPPORTS_COREDUMP
select ARCH_SUPPORTS_ROM_START if !SOC_FAMILY_ESPRESSIF_ESP32 select ARCH_SUPPORTS_ROM_START if !SOC_FAMILY_ESPRESSIF_ESP32
select ARCH_SUPPORTS_EMPTY_IRQ_SPURIOUS
select ARCH_HAS_CODE_DATA_RELOCATION select ARCH_HAS_CODE_DATA_RELOCATION
select ARCH_HAS_THREAD_LOCAL_STORAGE select ARCH_HAS_THREAD_LOCAL_STORAGE
select IRQ_OFFLOAD_NESTED if IRQ_OFFLOAD select IRQ_OFFLOAD_NESTED if IRQ_OFFLOAD
@ -608,6 +609,14 @@ config SIMPLIFIED_EXCEPTION_CODES
down to the generic K_ERR_CPU_EXCEPTION, which makes testing code down to the generic K_ERR_CPU_EXCEPTION, which makes testing code
much more portable. much more portable.
config EMPTY_IRQ_SPURIOUS
bool "Create empty spurious interrupt handler"
depends on ARCH_SUPPORTS_EMPTY_IRQ_SPURIOUS
help
This option changes body of spurious interrupt handler. When enabled,
handler contains only an infinite while loop, when disabled, handler
contains the whole Zephyr fault handling procedure.
endmenu # Interrupt configuration endmenu # Interrupt configuration
config INIT_ARCH_HW_AT_BOOT config INIT_ARCH_HW_AT_BOOT
@ -673,6 +682,9 @@ config ARCH_SUPPORTS_ARCH_HW_INIT
config ARCH_SUPPORTS_ROM_START config ARCH_SUPPORTS_ROM_START
bool bool
config ARCH_SUPPORTS_EMPTY_IRQ_SPURIOUS
bool
config ARCH_HAS_EXTRA_EXCEPTION_INFO config ARCH_HAS_EXTRA_EXCEPTION_INFO
bool bool

7
arch/riscv/core/irq_manage.c
View file

@ -19,6 +19,12 @@ LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
FUNC_NORETURN void z_irq_spurious(const void *unused) FUNC_NORETURN void z_irq_spurious(const void *unused)
{ {
#ifdef CONFIG_EMPTY_IRQ_SPURIOUS
while (1) {
}
CODE_UNREACHABLE;
#else
unsigned long mcause; unsigned long mcause;
ARG_UNUSED(unused); ARG_UNUSED(unused);
@ -37,6 +43,7 @@ FUNC_NORETURN void z_irq_spurious(const void *unused)
} }
#endif #endif
z_riscv_fatal_error(K_ERR_SPURIOUS_IRQ, NULL); z_riscv_fatal_error(K_ERR_SPURIOUS_IRQ, NULL);
#endif /* CONFIG_EMPTY_IRQ_SPURIOUS */
} }
#ifdef CONFIG_DYNAMIC_INTERRUPTS #ifdef CONFIG_DYNAMIC_INTERRUPTS