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arch/armv8-m/arm_secure_irq.c: fix writing to the NVIC_AIRCR register

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Register key (VECTKEY) must be written, otherwise the write is ignored.

Reference:
https://developer.arm.com/documentation/100235/0004/the-cortex-m33-peripherals/system-control-block/application-interrupt-and-reset-control-register
This commit is contained in:
raiden00pl 2023-07-04 13:14:17 +02:00 committed by Xiang Xiao
parent a03b09c34d
commit 91be7781f5
1 changed files with 2 additions and 2 deletions
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4
arch/arm/src/armv8-m/arm_secure_irq.c
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@ -100,8 +100,8 @@ void up_secure_irq_all(bool secure)
{
int i;
modreg32(secure ? 0 : NVIC_AIRCR_BFHFNMINS,
NVIC_AIRCR_BFHFNMINS, NVIC_AIRCR);
modreg32((secure ? 0 : NVIC_AIRCR_BFHFNMINS) | NVIC_AIRCR_VECTKEY,
(NVIC_AIRCR_VECTKEY_MASK | NVIC_AIRCR_BFHFNMINS), NVIC_AIRCR);
modreg32(secure ? NVIC_DEMCR_SDME : 0,
NVIC_DEMCR_SDME, NVIC_DEMCR);