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Minor improvement to the up_irq_save() implementation

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This commit is contained in:
Gregory Nutt 2016-10-23 13:37:40 -06:00
parent 6bbe55602c
commit 1166d44441
1 changed files with 5 additions and 11 deletions
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16
arch/xtensa/include/irq.h
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@ -210,23 +210,17 @@ static inline void up_irq_restore(uint32_t ps)
static inline uint32_t up_irq_save(void)
{
/* Get the current value of the PS for return */
uint32_t ps = xtensa_getps();
uint32_t ps;
/* Disable all low- and medium-priority interrupts. High priority
* interrupts should not interfere with ongoing RTOS operations and
* are not disabled.
*
* NOTE: We also assume that since we were called from C logic, the
* EXCM must already be cleared.
*/
#ifdef CONFIG_XTENSA_CALL0_ABI
xtensa_setps(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM);
#else
xtensa_setps(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE);
#endif
__asm__ __volatile__
(
"psil %0, %1" : "=r"(ps) : "I"(XCHAL_EXCM_LEVEL)
);
/* Return the previous PS value so that it can be restored with
* up_irq_restore().