asm_inline_gcc.h

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/*
 * Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
/* Either public functions or macros or invoked by public functions */
 
#ifndef ZEPHYR_INCLUDE_ARCH_ARM64_ASM_INLINE_GCC_H_
#define ZEPHYR_INCLUDE_ARCH_ARM64_ASM_INLINE_GCC_H_
 
/*
 * The file must not be included directly
 * Include arch/cpu.h instead
 */
 
#ifndef _ASMLANGUAGE
 
#include <zephyr/arch/arm64/lib_helpers.h>
#include <zephyr/types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
static ALWAYS_INLINE unsigned int arch_irq_lock(void)
{
        unsigned int key;
 
        /*
         * Return the whole DAIF register as key but use DAIFSET to disable
         * IRQs.
         */
        key = read_daif();
        disable_irq();
 
        return key;
}
 
static ALWAYS_INLINE void arch_irq_unlock(unsigned int key)
{
        write_daif(key);
}
 
static ALWAYS_INLINE bool arch_irq_unlocked(unsigned int key)
{
        /* We only check the (I)RQ bit on the DAIF register */
        return (key & DAIF_IRQ_BIT) == 0;
}

static ALWAYS_INLINE bool arch_cpu_irqs_are_enabled(void)
{
        return (read_daif() & DAIF_IRQ_BIT) == 0;
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_ARCH_ARM64_ASM_INLINE_GCC_H_ */