1994/0513/pc/trap.c (diff list | history)

1994/0512/sys/src/9/pc/trap.c:183,189 – 1994/0513/sys/src/9/pc/trap.c:183,189 (short | long | prev | next)
1991/0709		* Set the 8259 as master with edge triggered * input with fully nested interrupts.
1991/0704		*/
1994/0512		outb(Int0ctl, (1<<4)|(1<<3)|(1<<0)); /* ICW1 - master, level triggered,
1994/0513		outb(Int0ctl, (1<<4)|(0<<3)|(1<<0)); /* ICW1 - master, level triggered,
1994/0512		ICW4 will be sent */
1991/0709		outb(Int0aux, Int0vec); /* ICW2 - interrupt vector offset */
1991/0731		outb(Int0aux, 0x04); /* ICW3 - have slave on level 2 */
1994/0512/sys/src/9/pc/trap.c:192,198 – 1994/0513/sys/src/9/pc/trap.c:192,198
1991/0731		/* * Set up the second 8259 interrupt processor. * Make 8259 interrupts start at CPU vector Int0vec. * Set the 8259 as master with edge triggered
1994/0513		* Set the 8259 as master with level triggered
1991/0731		* input with fully nested interrupts. */
1994/0512		outb(Int1ctl, (1<<4)|(1<<3)|(1<<0)); /* ICW1 - master, level triggered,
1994/0512/sys/src/9/pc/trap.c:529,549 – 1994/0513/sys/src/9/pc/trap.c:529,551
1991/0710		{
1991/0720		Ureg *nur;
1993/0915		nur = up->ureg; /* pointer to user returned Ureg struct */ if(nur->cs!=up->svcs || nur->ss!=up->svss || (nur->flags&0xff00)!=(up->svflags&0xff00)){
1991/0720		pprint("bad noted ureg cs %ux ss %ux flags %ux\n", nur->cs, nur->ss, nur->flags);
1991/0814		Die:
1991/0720		pexit("Suicide", 0); }
1993/0915		qlock(&up->debug); if(!up->notified){
1991/0814		pprint("call to noted() when not notified\n");
1994/0513		if(!up->notified) {
1993/0915		qunlock(&up->debug);
1994/0513		pprint("call to noted() when not notified\n");
1991/0720		return; }
1993/0915		up->notified = 0;
1994/0513		nur = up->ureg; /* pointer to user returned Ureg struct */ if(nur->cs!=up->svcs || nur->ss!=up->svss || (nur->flags&0xff00)!=(up->svflags&0xff00)) { qunlock(&up->debug); pprint("bad noted ureg cs %ux ss %ux flags %ux\n", nur->cs, nur->ss, nur->flags); pexit("Suicide", 0); }
1993/0915		nur->flags = (up->svflags&0xffffff00) | (nur->flags&0xff);
1992/0609		memmove(ur, nur, sizeof(Ureg));
1991/0720		switch(arg0){
1994/0512/sys/src/9/pc/trap.c:551,557 – 1994/0513/sys/src/9/pc/trap.c:553,559
1992/0616		if(!okaddr(nur->pc, 1, 0) || !okaddr(nur->usp, BY2WD, 0)){
1991/0814		pprint("suicide: trap in noted\n");
1993/0915		qunlock(&up->debug);
1991/0814		goto Die;
1994/0513		pexit("Suicide", 0);
1991/0814		}
1993/0915		qunlock(&up->debug);
1991/0722		return;
1994/0512/sys/src/9/pc/trap.c:581,587 – 1994/0513/sys/src/9/pc/trap.c:583,589
1993/1113		ur = up->dbgreg; ur->usp = (ulong)sp; ur->pc = entry; return USTKTOP-BY2WD; /* address of user-level clock */
1994/0513		return USTKTOP-BY2WD; /* address of user-level clock */
1993/1113		} ulong