__disable_fiq intrinsic

To use this intrinsic, your source file must contain #include <arm_compat.h>. This is only available for targets in AArch32 state.

Usage

int __disable_fiq(void); disables fast interrupts and returns the value the FIQ interrupt mask has in the PSR before disabling interrupts.

Return value

int __disable_fiq(void); returns the value the FIQ interrupt mask has in the PSR before disabling FIQ interrupts.

Restrictions

The __disable_fiq intrinsic can only be executed in privileged modes, that is, in non-user modes. In User mode, this intrinsic does not change the interrupt flags in the CPSR.

Example

void foo(void)
{
    int was_masked = __disable_fiq();
    /* ... */
    if (!was_masked)
        __enable_fiq();
}