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tests: arch: arm: interrupt: test the spurious ISR handler

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We extend the interrupt test for ARM Cortex-M so that
it can test the behavior of the spurious ISR handler.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit is contained in:
Ioannis Glaropoulos 2020-03-09 20:44:44 +01:00 • committed by Johan Hedberg
commit f003c8b508
2 changed files with 20 additions and 1 deletions
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3
tests/arch/arm/arm_interrupt/README.txt
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@ -6,7 +6,8 @@ Description:
The first test verifies that we can handle system fault conditions The first test verifies that we can handle system fault conditions
while running in handler mode (i.e. in an ISR). Only for ARM while running in handler mode (i.e. in an ISR). Only for ARM
Cortex-M targets. Cortex-M targets. The test also verifies the behavior of the
spurious interrupt handler.
The second test verifies that threads in user mode, despite being able to call The second test verifies that threads in user mode, despite being able to call
the irq_lock() and irq_unlock() functions without triggering a CPU fault, the irq_lock() and irq_unlock() functions without triggering a CPU fault,

18
tests/arch/arm/arm_interrupt/src/arm_interrupt.c
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@ -87,6 +87,24 @@ void test_arm_interrupt(void)
TC_PRINT("Available IRQ line: %u\n", i); TC_PRINT("Available IRQ line: %u\n", i);
/* Verify that triggering an interrupt in an IRQ line,
* on which an ISR has not yet been installed, leads
* to a fault of type K_ERR_SPURIOUS_IRQ.
*/
expected_reason = K_ERR_SPURIOUS_IRQ;
NVIC_ClearPendingIRQ(i);
NVIC_EnableIRQ(i);
NVIC_SetPendingIRQ(i);
__DSB();
__ISB();
/* Verify that the spurious ISR has led to the fault and the
* expected reason variable is reset.
*/
zassert_true(expected_reason == -1,
"expected_reason has not been reset\n");
NVIC_DisableIRQ(i);
arch_irq_connect_dynamic(i, 0 /* highest priority */, arch_irq_connect_dynamic(i, 0 /* highest priority */,
arm_isr_handler, arm_isr_handler,
NULL, NULL,