Accessors and modifiers of the IMASK state. More...

Macros
#define	irq_disable_scoped()
	Disable interrupts with scope management.

Typedefs
typedef uint32_t	irq_mask_t
	Type representing an interrupt mask state.

Functions
irq_mask_t	irq_get_sr (void)
	Get status register contents.

irq_mask_t	irq_disable (void)
	Disable interrupts.

void	irq_enable (void)
	Enable all interrupts.

void	irq_restore (irq_mask_t v)
	Restore IRQ state.

Detailed Description

Accessors and modifiers of the IMASK state.

This API is provided for managing and querying information regarding the interrupt mask, a series of bitflags representing whether each type of interrupt has been enabled or not.

Macro Definition Documentation

◆ irq_disable_scoped

#define irq_disable_scoped ( )

Value:

__irq_disable_scoped(__LINE__)

Disable interrupts with scope management.

This macro will disable interrupts, similarly to irq_disable(), with the difference that the interrupt state will automatically be restored once the execution exits the functional block in which the macro was called.

Typedef Documentation

◆ irq_mask_t

typedef uint32_t irq_mask_t

Type representing an interrupt mask state.

Function Documentation

◆ irq_disable()

irq_mask_t irq_disable ( void )

Disable interrupts.

This function will disable SH4 interrupts, but will leave SH4 general exceptions enabled.

Returns: The state of the SH4 interrupts before calling the function. This can be used to restore this state later on with irq_restore().

See also: irq_restore(), irq_enable()

Referenced by g2_lock().

◆ irq_enable()

void irq_enable ( void )

Enable all interrupts.

This function will enable ALL interrupts, including external ones.

See also: irq_disable()

◆ irq_get_sr()

irq_mask_t irq_get_sr ( void )

Get status register contents.

Returns the current value of the status register, as irq_disable() does. The function can be found in arch\dreamcast\kernel\entry.s

Note: This is the entire status register word, not just the IMASK field.

Return values

Status register word

See also: irq_disable()

◆ irq_restore()

void irq_restore ( irq_mask_t v )

Restore IRQ state.

This function will restore the interrupt state to the value specified. This should correspond to a value returned by irq_disable().

Parameters

v	The IRQ state to restore. This should be a value returned by irq_disable().

See also: irq_disable()

Referenced by g2_unlock().

Macros

Typedefs

Functions