1998/0731/pc/trap.c (diff list | history)

1998/0731/sys/src/9/pc/trap.c:18,38 – 1998/0806/sys/src/9/pc/trap.c:18,41 (short | long | prev | next)
Call intrenable even if that interrupt has already been enabled in the past. XXX why? rsc Fri Mar 4 12:44:25 2005
1991/0703		void
1997/0327		intrenable(int v, void (*f)(Ureg*, void*), void* a, int tbdf)
1991/0613		{
1997/0327		Irq * irq;
1998/0806		Irq *irq;
1997/0327		Irqctl *ctl;
1991/0614
1997/0327		lock(&irqctllock); if(irqctl[v] == 0){ ctl = xalloc(sizeof(Irqctl));
1998/0320		if(v >= VectorINTR && arch->intrenable(v, tbdf, ctl) == -1){
1997/0327		unlock(&irqctllock);
1998/0401		//print("intrenable: didn't find v %d, tbdf 0x%uX\n", v, tbdf);
1998/0806		if(irqctl[v] == 0) irqctl[v] = xalloc(sizeof(Irqctl)); ctl = irqctl[v]; if(v >= VectorINTR && arch->intrenable(v, tbdf, ctl) == -1){ if(ctl->irq == nil){ irqctl[v] = nil;
1997/0327		xfree(ctl); return; } irqctl[v] = ctl;
1998/0806		unlock(&irqctllock); print("intrenable: didn't find v %d, tbdf 0x%uX\n", v, tbdf); return;
1991/0709		}
1997/0327		ctl = irqctl[v];
1998/0806
1997/0327		irq = xalloc(sizeof(Irq)); irq->f = f; irq->a = a;