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/*
* Copyright 2016 Chris Johns <chrisj@rtems.org>
*
* Header for the FreeBSD ported elcr.c
*/
#ifndef _IRQ_ELCR_H_
#define _IRQ_ELCR_H_
#include <sys/cdefs.h>
enum intr_trigger {
INTR_TRIGGER_EDGE,
INTR_TRIGGER_LEVEL
};
/*
* Check to see if we have what looks like a valid ELCR. We do this by
* verifying that IRQs 0, 1, 2, and 13 are all edge triggered.
*/
int elcr_probe(void);
/*
* Returns 1 for level trigger, 0 for edge.
*/
enum intr_trigger elcr_read_trigger(u_int irq);
/*
* Set the trigger mode for a specified IRQ. Mode of 0 means edge triggered,
* and a mode of 1 means level triggered.
*/
void elcr_write_trigger(u_int irq, enum intr_trigger trigger);
void elcr_resume(void);
#endif
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