1993/1124/pc/devether.c (diff list | history)

1993/1120/sys/src/9/pc/devether.c:162,186 – 1993/1124/sys/src/9/pc/devether.c:162,167 (short | long | prev | next)
1993/1113		return n;
1992/0403		} static void
1993/1113		etherintr(Ureg *ur)
1992/0403		{
1993/1113		int i, irq;
1992/0403
1992/1222		/*
1993/1113		* Call all ethernet interrupt routines on this IRQ. * Might be better if setvec() took an argument which * was passed down to the interrupt routine when * called. This would let us easily distinguish multiple * controllers. A hack by any other name...
1992/1222		*/
1993/1113		irq = ur->trap-Int0vec; for(i = 0; i < MaxEther; i++){ if(ether[i] && ether[i]->irq == irq) (*ether[i]->interrupt)(ether[i]);
1992/0403		} }
1993/1113		static struct { char *type; int (*reset)(Ether*);
1993/1120/sys/src/9/pc/devether.c:222,236 – 1993/1124/sys/src/9/pc/devether.c:203,213
1992/1222		* IRQ2 doesn't really exist, it's used to gang the interrupt * controllers together. A device set to IRQ2 will appear on * the second interrupt controller as IRQ9.
1993/1113		* If there are multiple controllers on the same IRQ, only * call setvec() for one of them, etherintr() will scan through * all the controllers looking for those at the IRQ it was * called with. This is a hack, see the comments in etherintr().
1992/1222		*/
1993/1113		if(ctlr->irq == 2) ctlr->irq = 9; if((irqmask & (1<<ctlr->irq)) == 0){ setvec(Int0vec+ctlr->irq, etherintr);
1993/1124		setvec(Int0vec+ctlr->irq, ctlr->interrupt, ctlr);
1993/1113		irqmask |= 1<<ctlr->irq; }
1993/0212