esp-open-rtos/include/xtensa_interrupts.h

/* Xtensa interrupt management functions
 *
 * Some (w/ sdk_ prefix) are implemented in binary libs, rest are
 * inlines replacing functions in the binary libraries.
 *
 * Part of esp-open-rtos
 * Copyright (C) 2015 Superhouse Automation Pty Ltd
 * BSD Licensed as described in the file LICENSE
 */
#ifndef _XTENSA_INTERRUPTS_H
#define _XTENSA_INTERRUPTS_H
#include <stdint.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);

/* 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));
    intenable |= unmask;
    asm volatile ("wsr %0, intenable; esync" :: "a" (intenable));
}

INLINED void _xt_isr_mask (uint32_t mask)
{
    uint32_t intenable;
    asm volatile ("rsr %0, intenable" : "=a" (intenable));
    intenable &= ~mask;
    asm volatile ("wsr %0, intenable; esync" :: "a" (intenable));
}

INLINED uint32_t _xt_read_ints (void)
{
    uint32_t interrupt;
    asm volatile ("rsr %0, interrupt" : "=a" (interrupt));
    return interrupt;
}

INLINED void _xt_clear_ints(uint32_t mask)
{
    asm volatile ("wsr %0, intclear; esync" :: "a" (mask));
}

typedef void (* _xt_isr)(void);
/* This function is implemeneted in FreeRTOS port.c at the moment,
   should be moved or converted to an inline */
void        _xt_isr_attach (uint8_t i, _xt_isr func);

#endif