IRQ management

CMRX offers a tiny set of hardware-oriented services that allow manipulating the status of interrupt request lines. More...

Functions
__SYSCALL int	irq_enable (uint32_t irq)
	Enable IRQ line.
__SYSCALL int	irq_disable (uint32_t irq)
	Disable IRQ line.

Detailed Description

CMRX offers a tiny set of hardware-oriented services that allow manipulating the status of interrupt request lines.

This is provided in order to give drivers access to IRQ configuration from userspace, which may otherwise be denied by the hardware.

Function Documentation

irq_disable()

__SYSCALL int irq_disable

(

uint32_t

irq

)

Disable IRQ line.

This syscall will disable IRQ line identified by the IRQ number. The implementation of this call is platform-specific and IRQ number has hardware-specific meaning. CMRX kernel does not perform any interpretation of these values.

In general it is not an error trying to disable already disabled IRQ.

Parameters

irq	IRQ number of interrupt line to be disabled

Returns

E_OK if IRQ has been disabled, E_NOTAVAIL if IRQ couldn't be disabled.

irq_enable()

__SYSCALL int irq_enable

(

uint32_t

irq

)

Enable IRQ line.

This syscall will enable IRQ line identified by the IRQ number. The implementation of this call is platform-specific and IRQ number has hardware-specific meaning. CMRX kernel does not perform any interpretation of these values.

In general it is not an error trying to enable already enabled IRQ.

Parameters

irq	IRQ number of interrupt line to be enabled

Returns

E_OK if IRQ has been enabled, E_NOTAVAIL if IRQ couldn't be enabled.