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Up to [local] / funnyos / arch / testarm / dev

add tairqc, driver for testarm Interrupt Controller Unit;
this irqc contains only three registers: intr status, mask and unmask.
on testarm we will be invoked from low-level when CPU Ext. IRQ is asserted.

devconfig machinery will support vectors-table allowing us to switch
control flow based on this table into devices' interrupt handlers

he-he, still more work on the road, but i need to commit it to work on it.

/*
 * $Id: tairqc.c,v 1.1 2007/10/29 20:12:18 init Exp $
 */
#include <sys/types.h>
#include <sys/device.h>
#include <sys/bus.h>

#include <arch/testarm/dev/tairqcvar.h>
#include <arch/testarm/dev/tairqcreg.h>

/*
 * testarm Interrupt Controller Unit support.
 */
int 	tairqc_attach(struct device *self, uint32_t loc, uint8_t flags);
void 	tairqc_irq(void);


struct driver tairqc_dr = {
	sizeof(struct tairqc_dd),
	tairqc_attach,
	NULL
};


int
tairqc_attach(struct device *self, uint32_t loc, uint8_t flags)
{
	struct tairqc_dd *ddp = self->dv_devdata;

	/* leap to parent's bus_handle */
	ddp->td_bushandlep = self->dv_parent->dv_aux;

	

}


void
tairqc_irq(void)
{
	/*
	 * Process an IRQ
	 */

}