1995/0223/pc/trap.c (diff list | history)

1995/0222/sys/src/9/pc/trap.c:259,265 – 1995/0223/sys/src/9/pc/trap.c:259,265 (short | long | prev | next)
1991/1113		char buf[ERRLEN];
1993/0217		Handler *h;
1993/1116		static int iret_traps;
1995/0222		uchar isr0, isr1;
1995/0223		ushort isr;
1991/0703
1991/0731		v = ur->trap;
1995/0222/sys/src/9/pc/trap.c:279,290 – 1995/0223/sys/src/9/pc/trap.c:279,290
1991/0801		* off at this point)
1991/0709		*/
1991/0731		c = v&~0x7;
1995/0222		isr0 = isr1 = 0x00;
1995/0223		isr = 0;
1991/0731		if(c==Int0vec || c==Int1vec){
1995/0222		isr0 = inb(Int0ctl);
1995/0223		isr = inb(Int0ctl);
1993/0225		outb(Int0ctl, EOI);
1995/0222		if(c == Int1vec){ isr1 = inb(Int1ctl);
1995/0223		isr |= inb(Int1ctl)<<8;
1991/0731		outb(Int1ctl, EOI);
1995/0222		}
1991/1113		}
1995/0222/sys/src/9/pc/trap.c:308,314 – 1995/0223/sys/src/9/pc/trap.c:308,314
1991/1113		} }
1993/0224		if(v >= Int0vec || v < Int0vec+16){
1995/0223		if(v >= Int0vec && v < Int0vec+16){
1994/0722		/* an unknown interrupt */
1993/0224		v -= Int0vec;
1995/0222		/*
1995/0222/sys/src/9/pc/trap.c:316,328 – 1995/0223/sys/src/9/pc/trap.c:316,329
1995/0222		* the IRQ input goes away before the acknowledge. * In this case, a 'default IRQ7' is generated, but * the corresponding bit in the ISR isn't set.
1995/0223		* In fact, just ignore all such interrupts.
1995/0222		*/ if(v == 7 && (isr0 & 0x80) == 0)
1995/0223		if((isr & (1<<v)) == 0)
1995/0222		goto out; if(badintr[v]++ == 0 || (badintr[v]%100000) == 0){
1993/0224		print("unknown interrupt %d pc=0x%lux: total %d\n", v, ur->pc, badintr[v]);
1995/0222		print("isr0 = 0x%2.2ux, isr1 = 0x%2.2ux\n", isr0, isr1);
1995/0223		print("isr = 0x%4.4ux\n", isr);
1995/0222		}
1993/0224		} else { /* unimplemented traps */