arch/avr8/include/arch/interrupt.h File Reference

AVR-specific interrupt masking/unmasking. More...

#include <compiler.h>
#include <cpu/regs.h>
#include <types.h>

Go to the source code of this file.

Defines
#define	cpu_irq_is_enabled()   cpu_irq_is_enabled_flags(cpu_read_reg8(SREG))
	Test if interrupts are enabled.
Typedefs
typedef uint8_t	irqflags_t
	Type used for holding the current interrupt state.
Functions
static __always_inline irqflags_t	cpu_irq_save (void)
	Save the current interrupt state and disable interrupts.
static __always_inline void	cpu_irq_restore (irqflags_t flags)
	Restore saved interrupt state.
static __always_inline bool	cpu_irq_is_enabled_flags (irqflags_t flags)
	Test if interrupts are enabled in flags.

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Detailed Description

AVR-specific interrupt masking/unmasking.

Copyright (C) 2009 Atmel Corporation. All rights reserved.

Definition in file interrupt.h.

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Define Documentation

 

#define cpu_irq_is_enabled

(

)

cpu_irq_is_enabled_flags(cpu_read_reg8(SREG))

Test if interrupts are enabled.

Return values:

	true	If interrups are enabled
	false	If interrupts are disabled

Definition at line 91 of file interrupt.h.

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Typedef Documentation

typedef uint8_t irqflags_t

Type used for holding the current interrupt state.

Definition at line 48 of file interrupt.h.

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Function Documentation

static __always_inline bool cpu_irq_is_enabled_flags

(

irqflags_t

flags

)

[static]

Test if interrupts are enabled in flags.

Parameters:

flags

Saved interrupt state

Return values:

	true	If flags indicates interrups are enabled
	false	If flags indicates interrupts are disabled

Definition at line 81 of file interrupt.h.

References CPUR_SREG_I.

static __always_inline void cpu_irq_restore

(

irqflags_t

flags

)

[static]

Restore saved interrupt state.

Parameters:

flags

A cookie returned by cpu_irq_save()

Definition at line 69 of file interrupt.h.

References barrier, and cpu_write_reg8.

Referenced by atomic_add(), atomic_clear_bit(), atomic_set_bit(), atomic_sub(), atomic_test_and_clear_bit(), atomic_test_and_set_bit(), and atomic_toggle_bit().

static __always_inline irqflags_t cpu_irq_save

(

void

)

[static]

Save the current interrupt state and disable interrupts.

Returns:

A cookie indicating the interrupt state before interrupts were disabled.

Definition at line 55 of file interrupt.h.

References cpu_irq_disable, and cpu_read_reg8.

Referenced by atomic_add(), atomic_clear_bit(), atomic_set_bit(), atomic_sub(), atomic_test_and_clear_bit(), atomic_test_and_set_bit(), and atomic_toggle_bit().