IRQ state handling

API for handling IRQ state More...

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

Functions
static void	irq_enable (void)
	Enable all interrupts.
static irq_mask_t	irq_disable (void)
	Disable interrupts.
static void	irq_restore (irq_mask_t state)
	Restore interrupt state.
static bool	irq_inside_int (void)
	Returns whether inside of an interrupt context.

Detailed Description

API for handling IRQ state

The following functions can be used to disable or enable interrupts, restore a previously saved interrupt state, or query whether or not the calling function is running in an interrupt context.

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.

Referenced by do_dma_transfer().

Function Documentation

irq_disable()

static irq_mask_t irq_disable ( void )

inlinestatic

Disable interrupts.

This function will disable interrupts (not exceptions).

Returns

An opaque token containing the interrupt state. It should be passed to irq_restore() in order to restore the previous interrupt state.

See also

irq_restore(), irq_enable()

Referenced by draw_sphere(), and g2_lock().

irq_enable()

static void irq_enable ( void )

inlinestatic

Enable all interrupts.

This function will enable ALL interrupts, including external ones.

See also

irq_disable()

Referenced by draw_sphere().

irq_inside_int()

static bool irq_inside_int ( void )

inlinestatic

Returns whether inside of an interrupt context.

Return values

non-zero	If inside an interrupt handler.
0	If normal processing is in progress.

Referenced by spinlock_lock_irqsafe().

irq_restore()

static void irq_restore ( irq_mask_t state )

inlinestatic

Restore interrupt state.

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

Parameters

state

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

See also

irq_disable()

Referenced by g2_unlock().