OS_RestoreInterrupts_IrqAndFiq

C Specification

#include <nitro/os.h>

OSIntrMode OS_RestoreInterrupts_IrqAndFiq( OSIntrMode state );

Arguments

state Interrupt status set up (OSIntrMode itself is a u32 typedef)

Return Values

The state before the function is called. This is the logical sum of OSIntrMode_Irq enum value and OSIntrMode_Fiq enum value.

OS_INTRMODE_IRQ_DISABLE IRQ Disable (prohibited)
OS_INTRMODE_IRQ_ENABLE IRQ Enable (permitted)

Returns the OSIntrMode_Fiq enum value:

OS_INTRMODE_FIQ_DISABLE FIQ Disable (prohibited)
OS_INTRMODE_FIQ_ENABLE FIQ Enable (permitted)

Description

This function sets the interrupt state. It takes the interrupt state given by the argument. The status is provided by the logical sum of the IRQ status expressed in OSIntrMode_Irq enumerated, and the FIQ status expressed in OSIntrMode_Fiq enumerated. Mainly the return values are from OS_EnableInterrupts_IrqAndFiq() and OS_DisableInterrupts_IrqAndFiq().

They are most likely useful for returning to the previous status.

Internal Operation

The CPSR register (current program status register) IRQ and FIQ interrupt control bits are set/reset.

See Also

OS_EnableInterrupts_IrqAndFiq, OS_DisableInterrupts_IrqAndFiq, OS_RestoreInterrupts

Revision History

03/08/2005 Standardized the Japanese word for "interrupt."
03/04/2004 Transition from OS_RestoreInterrupts.