#include <nitro/os.h>OSIntrMode OS_RestoreInterrupts_IrqAndFiq( OSIntrMode state );state |
Interrupt state to set.OSIntrMode is a u32 typedef. |
Returns a value that indicates the state before this function was called.
The return value type is OSIntrMode (a u32 typedef), but the return value will be the logical sum of the OSIntrMode_Irq and OSIntrMode_Fiq enumerated types.
The OSIntrMode_Irq enumerated type:
| Value | Previous state |
|---|---|
OS_INTRMODE_IRQ_DISABLE |
IRQ Disable (prohibited) |
OS_INTRMODE_IRQ_ENABLE |
IRQ Enable (permitted) |
The OSIntrMode_Fiq enumerated type:
| Value | Previous State |
|---|---|
OS_INTRMODE_FIQ_DISABLE |
FIQ Disable (prohibited) |
OS_INTRMODE_FIQ_ENABLE |
FIQ Enable (permitted) |
Sets the interrupt state.
It takes the interrupt state given by state. The state given is the logical sum of the IRQ status expressed in the OSIntrMode_Irq enumerated type and the FIQ status expressed in the OSIntrMode_Fiq enumerated type.
However, it is expected that the state parameter will often be used primarily to restore the previous state by specifying to it the return value of the OS_EnableInterrupts_IrqAndFiq or OS_DisableInterrupts_IrqAndFiq function.
These return values represent the states prior to calling these functions.
Example:
OSIntrMode e = OS_DisableInterrupts_IrqAndFiq();
// Interrupts are disabled here
(void)OS_RestoreInterrupts_IrqAndFiq( e );The CPSR register (current program status register) IRQ and FIQ interrupt control bits are set/reset.
OS_EnableInterrupts_IrqAndFiq
OS_DisableInterrupts_IrqAndFiq
OS_RestoreInterrupts
2005/03/08 Standardized the Japanese word for "interrupt".
2004/03/04 Moved from the OS_RestoreInterrupts function.
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