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xtensa_interrupts: Add _xt_disable_interrupts/_xt_restore_interrupts inline functions

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This commit is contained in:
Angus Gratton 2015-06-18 11:15:26 +10:00
parent a3c4469b1f
commit 4217a1029e
2 changed files with 45 additions and 16 deletions
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34
include/xtensa_interrupts.h
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@ -10,14 +10,46 @@
#ifndef _XTENSA_INTERRUPTS_H
#define _XTENSA_INTERRUPTS_H
#include <stdint.h>
#include <stdbool.h>
#include <xtruntime.h>
#include <xtensa/hal.h>
#include <common_macros.h>
void sdk__xt_int_exit (void);
void sdk__xt_user_exit (void);
void sdk__xt_tick_timer_init (void);
void sdk__xt_timer_int1(void);
INLINED void _xt_isr_unmask (uint32_t unmask)
INLINED uint32_t _xt_get_intlevel(void)
{
uint32_t level;
__asm__ volatile("rsr %0, intlevel" : "=a"(level));
return level;
}
/* Disable interrupts and return the old ps value, to pass into
_xt_restore_interrupts later.
This is desirable to use in place of
portDISABLE_INTERRUPTS/portENABLE_INTERRUPTS for
non-FreeRTOS & non-portable code.
*/
INLINED uint32_t _xt_disable_interrupts(void)
{
uint32_t old_level;
__asm__ volatile ("rsil %0, " XTSTR(XCHAL_EXCM_LEVEL) : "=a" (old_level));
return old_level;
}
/* Restore PS level. Intended to be used with _xt_disable_interrupts */
INLINED void _xt_restore_interrupts(uint32_t new_ps)
{
__asm__ volatile ("wsr %0, ps; rsync" :: "a" (new_ps));
}
/* ESPTODO: the mask/unmask functions aren't thread safe */
INLINED void _xt_isr_unmask(uint32_t unmask)
{
uint32_t intenable;
asm volatile ("rsr %0, intenable" : "=a" (intenable));