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arch: arm: restrict IRQ lock to minimum during pendSV exception #15735

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Merged
merged 1 commit into from
Apr 30, 2019
Merged

arch: arm: restrict IRQ lock to minimum during pendSV exception #15735

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22 changes: 11 additions & 11 deletions arch/arm/core/swap_helper.S
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Original file line number Diff line number Diff line change
Expand Up @@ -55,17 +55,6 @@ SECTION_FUNC(TEXT, __pendsv)
#endif /* CONFIG_ARMV6_M_ARMV8_M_BASELINE */
#endif /* CONFIG_TRACING */

/* protect the kernel state while we play with the thread lists */
#if defined(CONFIG_ARMV6_M_ARMV8_M_BASELINE)
cpsid i
#elif defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE)
movs.n r0, #_EXC_IRQ_DEFAULT_PRIO
msr BASEPRI, r0
isb /* Make the effect of disabling interrupts be realized immediately */
#else
#error Unknown ARM architecture
#endif /* CONFIG_ARMV6_M_ARMV8_M_BASELINE */

/* load _kernel into r1 and current k_thread into r2 */
ldr r1, =_kernel
ldr r2, [r1, #_kernel_offset_to_current]
Expand Down Expand Up @@ -96,6 +85,17 @@ SECTION_FUNC(TEXT, __pendsv)
#endif /* CONFIG_FP_SHARING */
#else
#error Unknown ARM architecture
#endif /* CONFIG_ARMV6_M_ARMV8_M_BASELINE */

/* Protect the kernel state while we play with the thread lists */
#if defined(CONFIG_ARMV6_M_ARMV8_M_BASELINE)
cpsid i
#elif defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE)
movs.n r0, #_EXC_IRQ_DEFAULT_PRIO
msr BASEPRI, r0
isb /* Make the effect of disabling interrupts be realized immediately */
#else
#error Unknown ARM architecture
#endif /* CONFIG_ARMV6_M_ARMV8_M_BASELINE */

/*
Expand Down