## diffname bitsy/trap.c 2000/0902
## diff -e /dev/null /n/emeliedump/2000/0902/sys/src/9/bitsy/trap.c
0a
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ureg.h"
#include "../port/error.h"
/*
* called in sysfile.c
*/
void
evenaddr(ulong addr)
{
if(addr & 3){
postnote(up, 1, "sys: odd address", NDebug);
error(Ebadarg);
}
}
void
exception(void)
{
}
/* Give enough context in the ureg to produce a kernel stack for
* a sleeping process
*/
void
setkernur(Ureg *ureg, Proc *p)
{
USED(ureg, p);
}
/*
* return the userpc the last exception happened at
*/
ulong
userpc(void)
{
return 0;
}
/* This routine must save the values of registers the user is not permitted
* to write from devproc and then restore the saved values before returning.
*/
void
setregisters(Ureg* ureg, char* pureg, char* uva, int n)
{
USED(ureg, pureg, uva, n);
}
/*
* this is the body for all kproc's
*/
static
void
linkproc(void)
{
spllo();
up->kpfun(up->kparg);
}
/*
* setup stack and initial PC for a new kernel proc. This is architecture
* dependent because of the starting stack location
*/
void
kprocchild(Proc *p, void (*func)(void*), void *arg)
{
p->sched.pc = (ulong)linkproc;
p->sched.sp = (ulong)p->kstack+KSTACK;
p->kpfun = func;
p->kparg = arg;
}
/*
* Craft a return frame which will cause the child to pop out of
* the scheduler in user mode with the return register zero. Set
* pc to point to a l.s return function.
*/
void
forkchild(Proc *p, Ureg *ureg)
{
USED(p, ureg);
}
/*
* setup stack, initial PC, and any arch dependent regs for an execing user proc.
*/
long
execregs(ulong entry, ulong ssize, ulong nargs)
{
ulong *sp;
Ureg *ureg;
sp = (ulong*)(USTKTOP - ssize);
*--sp = nargs;
ureg = up->dbgreg;
ureg->r13 = (ulong)sp;
ureg->pc = entry;
return USTKTOP-BY2WD; /* address of user-level clock */
}
/*
* dump the processor stack for this process
*/
void
dumpstack(void)
{
}
ulong
dbgpc(Proc *p)
{
USED(p);
return 0;
}
.
## diffname bitsy/trap.c 2000/0929
## diff -e /n/emeliedump/2000/0902/sys/src/9/bitsy/trap.c /n/emeliedump/2000/0929/sys/src/9/bitsy/trap.c
23c
trapinit(void)
{
/*
* exceptionvectors points to a prototype in l.s of the
* exception vectors that save the regs and then call
* trap(). The actual vectorrs are double mapped
* to 0xffff0000 and to KZERO. We write them via
* KZERO since a data access to them will cause an
* exception.
*/
memmove((void*)KZERO, exceptionvectors, 2*4*8);
wbflush();
}
/*
* here on all exceptions with registers saved
*/
void
trap(Ureg *ureg)
.
21a
/*
* set up for exceptioons
*/
.
## diffname bitsy/trap.c 2000/1001
## diff -e /n/emeliedump/2000/0929/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1001/sys/src/9/bitsy/trap.c
45a
switch(ureg->type){
case PsrMfiq: /* fast interrupt */
panic("fiq can't happen");
break;
case PsrMabt: /* fault */
case PsrMabt+1: /* fault */
panic("faults not implemented");
break;
case PsrMund: /* undefined instruction */
panic("undefined instruction");
break;
case PsrMirq: /* device interrupt */
break;
case PsrMsvc: /* system call */
break;
}
.
40a
* enable an interrupt and attach a function to i
*/
void
intrenable(int irq, void (*f)(Ureg*, void*), void* a, char *name)
{
int vno;
Vctl *v;
v = xalloc(sizeof(Vctl));
v->irq = irq;
v->f = f;
v->a = a;
strncpy(v->name, name, NAMELEN-1);
v->name[NAMELEN-1] = 0;
lock(&vctllock);
v->next = vctl[irq];
vctl[irq] = v;
unlock(&vctllock);
}
/*
.
37a
/* map in interrupt registers */
intrregs = mapspecial(INTRREGS, sizeof(*intrregs));
/* make all interrupts irq and disable all interrupts */
intrregs->iclr = 0;
intrregs->icmr = 0;
.
21a
struct Intrregs *intrregs;
typedef struct Vctl {
Vctl* next; /* handlers on this vector */
char name[NAMELEN]; /* of driver */
int irq;
void (*f)(Ureg*, void*); /* handler to call */
void* a; /* argument to call it with */
} Vctl;
static Lock vctllock;
static Vctl *vctl[32];
.
16,20c
ulong icip; /* pending IRQs */
ulong icmr; /* IRQ mask */
ulong iclr; /* IRQ if bit == 0, FRIQ if 1 */
ulong iccr; /* control register */
ulong icfp; /* pending FIQs */
ulong dummy1[3]
ulong icpr; /* pending interrupts */
};
.
10,14c
struct Intrregs
.
## diffname bitsy/trap.c 2000/1002
## diff -e /n/emeliedump/2000/1001/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1002/sys/src/9/bitsy/trap.c
202,203c
Ureg *ureg;
ureg = p->dbgreg;
if(ureg == 0)
return 0;
return ureg->pc;
}
/*
* called in sysfile.c
*/
void
evenaddr(ulong addr)
{
if(addr & 3){
postnote(up, 1, "sys: odd address", NDebug);
error(Ebadarg);
}
}
/*
* here on a hardware reset
*/
void
reset(void)
{
.
198c
/*
* pc output by ps
*/
.
169c
Ureg *cureg;
p->sched.sp = (ulong)p->kstack+KSTACK-sizeof(Ureg);
p->sched.pc = (ulong)forkret;
cureg = (Ureg*)(p->sched.sp+2*BY2WD);
memmove(cureg, ureg, sizeof(Ureg));
/* syscall returns 0 for child */
cureg->r0 = 0;
/* Things from bottom of syscall which were never executed */
p->psstate = 0;
p->insyscall = 0;
.
138,139c
static void
.
123c
Ureg *ureg;
ureg = (Ureg*)up->dbgreg;
return ureg->pc;
.
114c
ureg->pc = p->sched.pc;
ureg->sp = p->sched.sp+4;
.
107a
/*
* Call user, if necessary, with note.
* Pass user the Ureg struct and the note on his stack.
*/
int
notify(Ureg* ureg)
{
int l;
ulong s, sp;
Note *n;
if(up->procctl)
procctl(up);
if(up->nnote == 0)
return 0;
s = spllo();
qlock(&up->debug);
up->notepending = 0;
n = &up->note[0];
if(strncmp(n->msg, "sys:", 4) == 0){
l = strlen(n->msg);
if(l > ERRLEN-15) /* " pc=0x12345678\0" */
l = ERRLEN-15;
sprint(n->msg+l, " pc=0x%.8lux", ureg->pc);
}
if(n->flag!=NUser && (up->notified || up->notify==0)){
if(n->flag == NDebug)
pprint("suicide: %s\n", n->msg);
qunlock(&up->debug);
pexit(n->msg, n->flag!=NDebug);
}
if(up->notified) {
qunlock(&up->debug);
splhi();
return 0;
}
if(!up->notify){
qunlock(&up->debug);
pexit(n->msg, n->flag!=NDebug);
}
sp = ureg->sp;
sp -= sizeof(Ureg);
if(!okaddr((ulong)up->notify, 1, 0)
|| !okaddr(sp-ERRLEN-4*BY2WD, sizeof(Ureg)+ERRLEN+4*BY2WD, 1)){
pprint("suicide: bad address in notify\n");
qunlock(&up->debug);
pexit("Suicide", 0);
}
up->ureg = (void*)sp;
memmove((Ureg*)sp, ureg, sizeof(Ureg));
*(Ureg**)(sp-BY2WD) = up->ureg; /* word under Ureg is old up->ureg */
up->ureg = (void*)sp;
sp -= BY2WD+ERRLEN;
memmove((char*)sp, up->note[0].msg, ERRLEN);
sp -= 3*BY2WD;
*(ulong*)(sp+2*BY2WD) = sp+3*BY2WD; /* arg 2 is string */
*(ulong*)(sp+1*BY2WD) = (ulong)up->ureg; /* arg 1 is ureg* */
*(ulong*)(sp+0*BY2WD) = 0; /* arg 0 is pc */
ureg->sp = sp;
ureg->pc = (ulong)up->notify;
up->notified = 1;
up->nnote--;
memmove(&up->lastnote, &up->note[0], sizeof(Note));
memmove(&up->note[0], &up->note[1], up->nnote*sizeof(Note));
qunlock(&up->debug);
splx(s);
return 1;
}
.
104a
case NSAVE:
if(!okaddr(nureg->pc, BY2WD, 0)
|| !okaddr(nureg->sp, BY2WD, 0)){
qunlock(&up->debug);
pprint("suicide: trap in noted\n");
pexit("Suicide", 0);
}
qunlock(&up->debug);
sp = oureg-4*BY2WD-ERRLEN;
splhi();
ureg->sp = sp;
((ulong*)sp)[1] = oureg; /* arg 1 0(FP) is ureg* */
((ulong*)sp)[0] = 0; /* arg 0 is pc */
break;
default:
pprint("unknown noted arg 0x%lux\n", arg0);
up->lastnote.flag = NDebug;
/* fall through */
case NDFLT:
if(up->lastnote.flag == NDebug){
qunlock(&up->debug);
pprint("suicide: %s\n", up->lastnote.msg);
} else
qunlock(&up->debug);
pexit(up->lastnote.msg, up->lastnote.flag!=NDebug);
.
103c
}
}
/*
* system calls
*/
#include "../port/systab.h"
/*
* Syscall is called directly from assembler without going through trap().
*/
void
syscall(Ureg* ureg)
{
ulong sp;
long ret;
int i, scallnr;
if((ureg->psr & PsrMask) != PsrMusr)
panic("syscall: cs 0x%4.4uX\n", ureg->psr);
m->syscall++;
up->insyscall = 1;
up->pc = ureg->pc;
up->dbgreg = ureg;
scallnr = ureg->r0;
up->scallnr = scallnr;
spllo();
sp = ureg->sp;
up->nerrlab = 0;
ret = -1;
if(!waserror()){
if(scallnr >= nsyscall){
pprint("bad sys call number %d pc %lux\n",
scallnr, ureg->pc);
postnote(up, 1, "sys: bad sys call", NDebug);
error(Ebadarg);
}
if(sp<(USTKTOP-BY2PG) || sp>(USTKTOP-sizeof(Sargs)-BY2WD))
validaddr(sp, sizeof(Sargs)+BY2WD, 0);
up->s = *((Sargs*)(sp+BY2WD));
up->psstate = sysctab[scallnr];
ret = systab[scallnr](up->s.args);
poperror();
}
if(up->nerrlab){
print("bad errstack [%d]: %d extra\n", scallnr, up->nerrlab);
for(i = 0; i < NERR; i++)
print("sp=%lux pc=%lux\n",
up->errlab[i].sp, up->errlab[i].pc);
panic("error stack");
}
up->insyscall = 0;
up->psstate = 0;
/*
* Put return value in frame. On the x86 the syscall is
* just another trap and the return value from syscall is
* ignored. On other machines the return value is put into
* the results register by caller of syscall.
*/
ureg->r0 = ret;
if(scallnr == NOTED)
noted(ureg, *(ulong*)(sp+BY2WD));
if(scallnr != RFORK && (up->procctl || up->nnote)){
splhi();
notify(ureg);
}
}
/*
* Return user to state before notify()
*/
void
noted(Ureg* ureg, ulong arg0)
{
Ureg *nureg;
ulong oureg, sp;
qlock(&up->debug);
if(arg0!=NRSTR && !up->notified) {
qunlock(&up->debug);
pprint("call to noted() when not notified\n");
pexit("Suicide", 0);
}
up->notified = 0;
nureg = up->ureg; /* pointer to user returned Ureg struct */
/* sanity clause */
oureg = (ulong)nureg;
if(!okaddr((ulong)oureg-BY2WD, BY2WD+sizeof(Ureg), 0)){
pprint("bad ureg in noted or call to noted when not notified\n");
qunlock(&up->debug);
pexit("Suicide", 0);
}
/* don't let user change system flags */
nureg->psr = (ureg->psr & ~(PsrMask|PsrDfiq|PsrDirq)) |
(nureg->psr & (PsrMask|PsrDfiq|PsrDirq));
memmove(ureg, nureg, sizeof(Ureg));
switch(arg0){
case NCONT:
case NRSTR:
if(!okaddr(nureg->pc, 1, 0) || !okaddr(nureg->sp, BY2WD, 0)){
qunlock(&up->debug);
pprint("suicide: trap in noted\n");
pexit("Suicide", 0);
}
up->ureg = (Ureg*)(*(ulong*)(oureg-BY2WD));
qunlock(&up->debug);
.
95d
91,92c
default:
panic("unknown trap");
.
85c
* here on all exceptions other than syscall (SWI)
.
80a
intrregs->icmr |= 1<<irq;
.
68d
63c
* enable an interrupt and attach a function to it
.
57c
/* make all interrupts IRQ (i.e. not FIQ) and disable all interrupts */
.
17c
ulong dummy1[3];
.
## diffname bitsy/trap.c 2000/1006
## diff -e /n/emeliedump/2000/1002/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1006/sys/src/9/bitsy/trap.c
100a
for(i = 0; i < 32; i++)
if((1<<i) & intrregs->icip){
iprint("irq: %d\n", i);
for(v = vctl[i]; v != nil; v = v->next)
v->f(ureg, v->a);
}
.
89a
int i;
Vctl *v;
iprint("trap %lux pc %lux psr %lux\n", ureg->type, ureg->pc, ureg->psr);
.
## diffname bitsy/trap.c 2000/1007
## diff -e /n/emeliedump/2000/1006/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1007/sys/src/9/bitsy/trap.c
60a
void
trapdump(char *tag)
{
iprint("%s: icip %lux icmr %lux iclr %lux iccr %lux icfp %lux\n",
tag, intrregs->icip, intrregs->icmr, intrregs->iclr,
intrregs->iccr, intrregs->icfp);
}
.
53a
/* use exception vectors at 0xFFFF0000 */
mappedIvecEnable();
/* set up the stacks for the interrupt modes */
setr13(PsrMfiq, m->sfiq);
setr13(PsrMirq, m->sirq);
setr13(PsrMabt, m->sabt);
setr13(PsrMund, m->sund);
.
43,51c
/* set up the exception vectors */
vpage0 = (Vpage0*)EVECTORS;
memmove(vpage0->vectors, vectors, sizeof(vpage0->vectors));
memmove(vpage0->vtable, vtable, sizeof(vpage0->vtable));
memset(vpage0->hole, 0, sizeof(vpage0->hole));
.
37a
* Layout at virtual address 0.
*/
typedef struct Vpage0 {
void (*vectors[8])(void);
ulong vtable[8];
ulong hole[16];
} Vpage0;
Vpage0 *vpage0;
/*
.
36a
.
## diffname bitsy/trap.c 2000/1012
## diff -e /n/emeliedump/2000/1007/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1012/sys/src/9/bitsy/trap.c
138a
}
if(user && (up->procctl || up->nnote)){
splhi();
notify(ureg);
.
127a
case PsrMabt+1: /* data fault */
pc = ureg->pc - 8;
va = getfar();
switch(getfsr() & 0xf){
case 0x0:
panic("vector exception at %lux\n", pc);
break;
case 0x1:
case 0x3:
if(user){
snprint(buf, sizeof(buf), "sys: alignment: pc 0x%lux va 0x%lux\n",
pc, va);
postnote(up, 1, buf, NDebug);
} else
panic("kernel alignment: pc 0x%lux va 0x%lux", pc, va);
break;
case 0x2:
panic("terminal exception at %lux\n", pc);
break;
case 0x4:
case 0x6:
case 0x8:
case 0xa:
case 0xc:
case 0xe:
panic("external abort at %lux\n", pc);
break;
case 0x5:
case 0x7:
/* translation fault, i.e., no pte entry */
faultarm(ureg, va, user, 0);
break;
case 0x9:
case 0xb:
/* domain fault, accessing something we shouldn't */
if(user){
sprint(buf, "sys: access violation: pc 0x%lux va 0x%lux\n", pc, va);
postnote(up, 1, buf, NDebug);
} else
panic("kernel access violation: pc 0x%lux va 0x%lux\n", pc, va);
break;
case 0xd:
case 0xf:
/* permission error, copy on write or real permission error */
faultarm(ureg, va, user, 1);
break;
}
break;
.
125,126c
case PsrMabt: /* prefetch fault */
iprint("prefetch abort at %lux\n", ureg->pc-4);
faultarm(ureg, ureg->pc - 4, user, 1);
.
119,120c
user = (ureg->psr & PsrMask) == PsrMusr;
.
117a
int user;
ulong pc, va;
char buf[ERRLEN];
.
110a
* called by trap to handle access faults
*/
static void
faultarm(Ureg *ureg, ulong va, int user, int read)
{
int n, insyscall;
char buf[ERRLEN];
insyscall = up->insyscall;
up->insyscall = 1;
n = fault(va, read);
iprint("fault returns %d\n", n);
if(n < 0){
if(!user){
dumpregs(ureg);
panic("fault: 0x%lux\n", va);
}
sprint(buf, "sys: trap: fault %s va=0x%lux",
read? "read" : "write", va);
postnote(up, 1, buf, NDebug);
}
up->insyscall = insyscall;
}
/*
.
86a
void
dumpregs(Ureg *ur)
{
iprint("r0 0x%.8lux r1 0x%.8lux r3 0x%.8lux r3 0x%.8lux\n",
ur->r0, ur->r1, ur->r2, ur->r3);
iprint("r4 0x%.8lux r5 0x%.8lux r6 0x%.8lux r7 0x%.8lux\n",
ur->r4, ur->r5, ur->r6, ur->r7);
iprint("r8 0x%.8lux r9 0x%.8lux r10 0x%.8lux r11 0x%.8lux\n",
ur->r8, ur->r9, ur->r10, ur->r11);
iprint("r12 0x%.8lux r13 0x%.8lux r14 0x%.8lux\n",
ur->r12, ur->r13, ur->r14);
iprint("type %.8lux psr %.8lux pc %.8lux\n", ur->type, ur->psr, ur->pc);
}
.
## diffname bitsy/trap.c 2000/1013
## diff -e /n/emeliedump/2000/1012/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1013/sys/src/9/bitsy/trap.c
288c
qpanic("error stack");
.
252c
qpanic("syscall: cs 0x%4.4uX\n", ureg->psr);
.
218c
qpanic("undefined instruction");
.
208c
qpanic("kernel access violation: pc 0x%lux va 0x%lux\n", pc, va);
.
194c
qpanic("external abort at %lux\n", pc);
.
186c
qpanic("terminal exception at %lux\n", pc);
.
183c
qpanic("kernel alignment: pc 0x%lux va 0x%lux", pc, va);
.
174c
qpanic("vector exception at %lux\n", pc);
.
171a
iprint("data fault pc 0x%lux va 0x%lux fsr 0x%lux\n", pc, va, getfsr());
.
166c
iprint("prefetch abort at 0x%lux\n", ureg->pc-4);
.
163c
qpanic("unknown trap");
.
139c
qpanic("fault: 0x%lux\n", va);
.
90c
iprint("r0 0x%.8lux r1 0x%.8lux r2 0x%.8lux r3 0x%.8lux\n",
.
## diffname bitsy/trap.c 2000/1014
## diff -e /n/emeliedump/2000/1013/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1014/sys/src/9/bitsy/trap.c
281a
iprint("syscall retuns %d\n", ret);
.
280a
iprint("before syscall\n");
.
251a
iprint("syscall in\n");
dumpregs(ureg);
.
224d
209c
qpanic("kernel access violation: pc 0x%lux va 0x%lux\n", ureg->pc, va);
.
206c
sprint(buf, "sys: access violation: pc 0x%lux va 0x%lux\n", ureg->pc, va);
.
195c
qpanic("external abort at %lux\n", ureg->pc);
.
187c
qpanic("terminal exception at %lux\n", ureg->pc);
.
184c
qpanic("kernel alignment: pc 0x%lux va 0x%lux", ureg->pc, va);
.
181c
ureg->pc, va);
.
175c
qpanic("vector exception at %lux\n", ureg->pc);
.
172c
iprint("data fault pc 0x%lux va 0x%lux fsr 0x%lux\n", ureg->pc, va, getfsr());
.
170d
166,167c
iprint("prefetch abort at 0x%lux\n", ureg->pc);
faultarm(ureg, ureg->pc, user, 1);
.
160a
/*
* All interrupts/exceptions should be resumed at ureg->pc-4,
* except for Data Abort which resumes at ureg->pc-8.
*/
if(ureg->type == (PsrMabt+1))
ureg->pc -= 8;
else
ureg->pc -= 4;
.
157c
ulong va;
.
133a
peekmmu(va);
.
## diffname bitsy/trap.c 2000/1015
## diff -e /n/emeliedump/2000/1014/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1015/sys/src/9/bitsy/trap.c
302c
panic("error stack");
.
294d
292d
264c
panic("syscall: cs 0x%4.4uX\n", ureg->psr);
.
261,262d
236a
}
.
235a
}
if(!found)
iprint("interrupt %d with no handler\n", i);
.
234c
for(v = vctl[i]; v != nil; v = v->next){
found = 1;
.
232c
for(i = 0; i < 32; i++){
found = 0;
.
229c
panic("undefined instruction");
.
224c
faultarm(ureg, va, user, 0);
.
219c
panic("kernel access violation: pc 0x%lux va 0x%lux\n", ureg->pc, va);
.
210c
faultarm(ureg, va, user, 1);
.
205c
panic("external abort at %lux\n", ureg->pc);
.
197c
panic("terminal exception at %lux\n", ureg->pc);
.
194c
panic("kernel alignment: pc 0x%lux va 0x%lux", ureg->pc, va);
.
185c
panic("vector exception at %lux\n", ureg->pc);
.
182c
//iprint("data fault pc 0x%lux(0x%lux) va 0x%lux fsr 0x%lux\n", ureg->pc, *(ulong*)(ureg->pc), va, getfsr());
.
177c
//iprint("prefetch abort at 0x%lux\n", ureg->pc);
.
174c
panic("unknown trap");
.
155c
int i, found;
.
141a
dumpregs(ureg);
.
140c
panic("fault: 0x%lux\n", va);
.
136c
//iprint("fault returns %d\n", n);
.
134c
//peekmmu(va);
.
## diffname bitsy/trap.c 2000/1016
## diff -e /n/emeliedump/2000/1015/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1016/sys/src/9/bitsy/trap.c
573a
print("execregs pc 0x%lux sp 0x%lux\n", ureg->pc, ureg->r13);
.
571a
memset(ureg, 0, 15*sizeof(ulong));
.
225c
faultarm(ureg, va, user, inst & Lbit);
.
211c
faultarm(ureg, va, user, inst & Lbit);
.
183c
inst = *(ulong*)(ureg->pc);
print("%d: data fault pc 0x%lux(0x%lux) va 0x%lux fsr 0x%lux\n", m->lastpid, ureg->pc, inst, va, getfsr());
.
178c
print("%d: prefetch abort at 0x%lux\n", m->lastpid, ureg->pc);
.
155a
ulong inst;
.
149a
/* all Pabt+1 faults are caused by loads or stores. The Lbit of
* the instruction distinquishes between them.
*/
enum
{
Lbit = 1<<20, /* load instruction */
};
.
## diffname bitsy/trap.c 2000/1018
## diff -e /n/emeliedump/2000/1016/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1018/sys/src/9/bitsy/trap.c
585c
//print("%lud: EXECREGS pc 0x%lux sp 0x%lux\n", up->pid, ureg->pc, ureg->r13);
.
558c
cureg = (Ureg*)(p->sched.sp);
.
554a
//print("%lud setting up for forking child %lud\n", up->pid, p->pid);
.
235c
faultarm(ureg, va, user, !writetomem(inst));
.
230c
panic("kernel access violation: pc 0x%lux va 0x%lux\n",
ureg->pc, va);
.
227c
sprint(buf, "sys: access violation: pc 0x%lux va 0x%lux\n",
ureg->pc, va);
.
221c
faultarm(ureg, va, user, !writetomem(inst));
.
193d
187d
181a
if((user && (ureg->r13 & 0xf0000000)) || (ureg->psr & 0x10) != 0x10){
warnregs(ureg, "wierd ureg");
panic("bad ureg\n");
}
.
157a
/* loads and stores are distinguished by bit 20 */
if(inst & (1<<20))
return 0;
return 1;
}
.
155,156c
/* swap always write memory */
if((inst & 0x0FC00000) == 0x01000000)
return 1;
.
153c
int
writetomem(ulong inst)
.
150,151c
/*
* returns 1 if the instruction writes memory, 0 otherwise
.
142,144c
// warnregs(ureg, "user fault");
sprint(buf, "sys: trap: fault %s va=0x%lux", read ? "read" : "write", va);
.
139,140c
warnregs(ureg, "kernel fault");
panic("fault: kernel accessing 0x%lux\n", va);
.
136d
134d
98c
seprint(p, e, "type %.8lux psr %.8lux pc %.8lux\n",
ur->type, ur->psr, ur->pc);
print("%s", buf);
.
96c
p = seprint(p, e, "r12 0x%.8lux r13 0x%.8lux r14 0x%.8lux\n",
.
94c
p = seprint(p, e, "r8 0x%.8lux r9 0x%.8lux r10 0x%.8lux r11 0x%.8lux\n",
.
92c
p = seprint(p, e, "r4 0x%.8lux r5 0x%.8lux r6 0x%.8lux r7 0x%.8lux\n",
.
90c
char buf[512];
char *e = buf+sizeof(buf);
char *p;
p = seprint(buf, e, "%s:\n", tag);
p = seprint(p, e, "r0 0x%.8lux r1 0x%.8lux r2 0x%.8lux r3 0x%.8lux\n",
.
88c
warnregs(Ureg *ur, char *tag)
.
82c
print("%s: icip %lux icmr %lux iclr %lux iccr %lux icfp %lux\n",
.
## diffname bitsy/trap.c 2000/1019
## diff -e /n/emeliedump/2000/1018/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1019/sys/src/9/bitsy/trap.c
275a
out:
.
261,273d
196,198c
if(ureg->type == PsrMirq){
found = 0;
va = intrregs->icip;
for(v = vctl; v != nil; v = v->next){
if(v->irqbit & va){
v->f(ureg, v->a);
found = 1;
}
}
if(!found)
print("unknown interrupt: %lux\n", intrregs->icip);
goto out;
.
179c
int found;
.
124,126c
v->next = vctl;
vctl = v;
intrregs->icmr |= v->irqbit;
.
117a
v->irqbit = 1<<irq;
.
35c
static Vctl *vctl;
.
28a
ulong irqbit;
.
## diffname bitsy/trap.c 2000/1025
## diff -e /n/emeliedump/2000/1019/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1025/sys/src/9/bitsy/trap.c
270c
if(user){
sprint(buf, "sys: undefined instruction: pc 0x%lux\n",
ureg->pc);
postnote(up, 1, buf, NDebug);
}else{
warnregs(ureg, "undefined instruction");
panic("undefined instruction");
}
.
104,105d
102c
seprint(p, e, "r12 0x%.8lux r13 0x%.8lux r14 0x%.8lux\n",
.
95a
p = seprint(p, e, "type %.8lux psr %.8lux pc %.8lux\n",
ur->type, ur->psr, ur->pc);
.
91c
char buf[1024];
.
## diffname bitsy/trap.c 2000/1026
## diff -e /n/emeliedump/2000/1025/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1026/sys/src/9/bitsy/trap.c
277a
#endif
.
271c
sprint(buf, "undefined instruction: pc 0x%lux\n",
.
269a
#ifdef NOTDEF
/* Inferno break handling, something for us? [SJM] */
if(*(ulong*)ureg->pc == BREAK && breakhandler) {
int s;
Proc *p;
p = up;
/* if (!waslo(ureg->psr) || (ureg->pc >= (ulong)splhi && ureg->pc < (ulong)islo))
p = 0; */
s = breakhandler(ureg, p);
if(s == BrkSched) {
c.callsched = 1;
sched();
} else if(s == BrkNoSched) {
c.callsched = 0;
if(up)
up->dbgreg = 0;
return;
}
break;
}
/* End of Inferno break handling [SJM] */
#endif
/* start of Inferno code [SJM] */
spllo();
if (waserror()) {
warnregs(ureg, "floating point error");
panic("floating point error");
}
if (!fpiarm(ureg)) {
warnregs(ureg, "illegal instruction");
panic("illegal instruction");
}
poperror();
/* end of Inferno code [SJM] */
#ifdef NOTDEF
/* We'll see what we do with this later [SJM] */
.
38d
19d
## diffname bitsy/trap.c 2000/1027
## diff -e /n/emeliedump/2000/1026/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1027/sys/src/9/bitsy/trap.c
313c
poperror();
/* end of Inferno code [SJM] */
.
297,308c
if (user) {
if (!fpiarm(ureg)) {
sprint(buf, "undefined instruction: pc 0x%lux\n", ureg->pc);
postnote(up, 1, buf, NDebug);
}
.
268,290d
## diffname bitsy/trap.c 2000/1028
## diff -e /n/emeliedump/2000/1027/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1028/sys/src/9/bitsy/trap.c
283d
275c
x = spllo();
rv = fpiarm(ureg);
splx(x);
if (rv == 0) {
.
269,273d
181c
int user, x, rv;
.
## diffname bitsy/trap.c 2000/1031
## diff -e /n/emeliedump/2000/1028/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1031/sys/src/9/bitsy/trap.c
624a
callwithureg(_dumpstack);
.
622a
callwithureg(void (*fn)(Ureg*))
{
Ureg ureg;
ureg.pc = getcallerpc(&fn);
ureg.sp = (ulong)&fn;
fn(&ureg);
}
static void
_dumpstack(Ureg *ureg)
{
ulong l, v, i;
ulong *p;
extern ulong etext;
if(up == 0)
return;
print("ktrace /kernel/path %.8lux %.8lux\n", ureg->pc, ureg->sp);
i = 0;
for(l=(ulong)&l; l<(ulong)(up->kstack+KSTACK); l+=4){
v = *(ulong*)l;
if(KTZERO < v && v < (ulong)&etext && (v&3)==0){
v -= 4;
p = (ulong*)v;
if((*p & 0x0f000000) == 0x0b000000)
print("%.8lux=%.8lux ", l, v);
}
if(i == 4){
i = 0;
print("\n");
}
}
if(i)
print("\n");
}
void
.
620c
* Fill in enough of Ureg to get a stack trace, and call a function.
* Used by debugging interface rdb.
.
364d
361,362c
splhi();
if(scallnr != RFORK && (up->procctl || up->nnote))
.
289d
286,287c
splhi();
if(user && (up->procctl || up->nnote))
.
94c
p = seprint(p, e, "type 0x%.8lux psr 0x%.8lux pc 0x%.8lux\n",
.
## diffname bitsy/trap.c 2000/1101
## diff -e /n/emeliedump/2000/1031/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1101/sys/src/9/bitsy/trap.c
648a
i++;
}
.
647c
if((*p & 0x0f000000) == 0x0b000000){
.
## diffname bitsy/trap.c 2000/1121
## diff -e /n/emeliedump/2000/1101/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1121/sys/src/9/bitsy/trap.c
242c
panic("external abort 0x%ux pc 0x%lux addr 0x%lux\n", fsr, ureg->pc, va);
.
220c
fsr = getfsr() & 0xf;
switch(fsr){
.
182c
ulong va, fsr;
.
## diffname bitsy/trap.c 2000/1122
## diff -e /n/emeliedump/2000/1121/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1122/sys/src/9/bitsy/trap.c
198a
/* clear any gpio edge interrupt */
gpioregs->irqbit = va & 0xFFF;
.
130a
* enable an interrupt on gpio line. edge is encoded as follows
*/
void
gpiointrenable(ulong bit, int edge, void (*f)(Ureg*, void*), void* a, char *name)
{
int irq;
/* figure out which interrupt */
for(irq = 0; irq < 28; irq++)
if((1<<irq) & bit)
break;
if(irq >= 28)
panic("gpiointrenable %lux", bit);
if(irq > 11)
irq = 11;
/* it had better be input */
if(bit & gpioregs->direction)
panic(""gpiointrenable %lux of output pin", bit);
/* set edge register */
switch(edge){
case GPIOboth:
gpioregs->rising |= bit;
gpioregs->falling |= bit;
break;
case GPIOfalling:
gpioregs->falling |= bit;
break;
case GPIOrising:
gpioregs->rising |= bit;
break;
}
intrenable(irq, f, a, name);
}
/*
.
## diffname bitsy/trap.c 2000/1125
## diff -e /n/emeliedump/2000/1122/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1125/sys/src/9/bitsy/trap.c
149c
panic("gpiointrenable %lux of output pin", bit);
.
## diffname bitsy/trap.c 2000/1128
## diff -e /n/emeliedump/2000/1125/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1128/sys/src/9/bitsy/trap.c
239c
gpioregs->edgestatus = va & 0xFFF;
.
## diffname bitsy/trap.c 2000/1130
## diff -e /n/emeliedump/2000/1128/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1130/sys/src/9/bitsy/trap.c
331a
}
/*
* here on irq's
*/
static void
irq(Ureg *ur)
{
ulong va;
int i;
Vctl *v;
va = intrregs->icip;
for(i = 0; i < 32; i++){
if(((1<<i) & va) == 0)
continue;
for(v = vctl[i]; v != nil; v = v->next){
v->f(ur, v->a);
va &= ~(1<<i);
}
}
if(va)
print("unknown interrupt: %lux\n", va);
}
/*
* here on gpio interrupts
*/
static void
gpiointr(Ureg *ur, void*)
{
ulong va;
int i;
Vctl *v;
va = gpioregs->edgestatus;
gpioregs->edgestatus = va;
iprint("gpio intr %lux\n", va);
for(i = 0; i < 27; i++){
if(((1<<i) & va) == 0)
continue;
for(v = gpiovctl[i]; v != nil; v = v->next){
v->f(ur, v->a);
va &= ~(1<<i);
}
}
if(va)
print("unknown gpio interrupt: %lux\n", va);
.
328d
255a
case PsrMirq:
irq(ureg);
break;
.
234,251d
217,218d
165c
if(gpioirqref[irq]++ == 0)
intrenable(irq, gpiointr, nil, "gpio edge");
.
161c
gpioregs->rising |= mask;
.
158c
gpioregs->falling |= mask;
.
154,155c
gpioregs->rising |= mask;
gpioregs->falling |= mask;
.
151c
/* create a second level vctl for the gpio edge interrupt */
v = xalloc(sizeof(Vctl));
v->f = f;
v->a = a;
strncpy(v->name, name, NAMELEN-1);
v->name[NAMELEN-1] = 0;
lock(&vctllock);
v->next = gpiovctl[bit];
gpiovctl[bit] = v;
unlock(&vctllock);
/* set edge register to enable interrupt */
.
147,149c
/* the pin had better be configured as input */
if((1<<bit) & gpioregs->direction)
panic("gpiointrenable of output pin %d", bit);
.
142,144c
irq = bit;
if(bit >= nelem(gpiovctl) || bit < 0)
panic("gpiointrenable");
if(bit > 11)
.
138,140c
/* figure out which bit */
for(bit = 0; bit < 32; bit++)
if((1<<bit) == mask)
.
136c
int irq, bit;
Vctl *v;
.
134c
gpiointrenable(ulong mask, int edge, void (*f)(Ureg*, void*), void* a, char *name)
.
124,126c
v->next = vctl[irq];
vctl[irq] = v;
intrregs->icmr |= 1<<irq;
.
116,117d
114a
if(irq >= nelem(vctl) || irq < 0)
panic("intrenable");
.
59a
/* Set the doze function pointer to the moved _doze() routine */
doze = (void(*)(void))vpage0->doze;
.
58c
/* Move the twelve instructions of doze() to a cache-line boundary: */
memmove(vpage0->doze, _doze, 12*sizeof(long));
.
47a
void (*doze)(void);
static void irq(Ureg*);
static void gpiointr(Ureg*, void*);
.
44c
/* Doze goes here because it needs to be on a cache-line boundary */
ulong doze[16];
.
34,35c
static Lock vctllock;
static Vctl *vctl[32];
static Vctl *gpiovctl[27];
static int gpioirqref[12];
.
27,29d
25d
## diffname bitsy/trap.c 2000/1205
## diff -e /n/emeliedump/2000/1130/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1205/sys/src/9/bitsy/trap.c
794,802d
379,380d
191c
irqenable(irq, gpiointr, nil, "gpio edge");
.
189a
/* point the irq to the gpio interrupt handler */
.
186c
gpioregs->rising |= 1<<which;
.
183c
gpioregs->falling |= 1<<which;
.
179,180c
gpioregs->rising |= 1<<which;
gpioregs->falling |= 1<<which;
.
177c
switch(type){
.
172,173c
v->next = gpiovctl[which];
gpiovctl[which] = v;
.
161,162c
if((1<<which) & gpioregs->direction)
panic("gpiointrenable of output pin %d", which);
.
157c
if(which > 11)
.
154,155c
/* from here down, it must be a GPIO edge interrupt */
irq = which;
if(which >= nelem(gpiovctl) || which < 0)
.
149,152c
if(type == IRQ){
irqenable(which, f, a, name);
return;
}
.
146c
int irq;
.
144c
intrenable(int type, int which, IntrHandler *f, void* a, char *name)
.
141c
* enable an interrupt
.
120c
irqenable(int irq, IntrHandler *f, void* a, char *name)
.
117c
* enable an irq interrupt
.
## diffname bitsy/trap.c 2000/1206
## diff -e /n/emeliedump/2000/1205/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1206/sys/src/9/bitsy/trap.c
409c
panic("syscall: pc 0x%lux r14 0x%lux cs 0x%ux\n", ureg->pc, ureg->r14, ureg->psr);
.
## diffname bitsy/trap.c 2000/1207
## diff -e /n/emeliedump/2000/1206/sys/src/9/bitsy/trap.c /n/emeliedump/2000/1207/sys/src/9/bitsy/trap.c
742c
print("ktrace /kernel/path %.8lux %.8lux %.8lux\n", ureg->pc, ureg->sp, ureg->r14);
.
625a
ureg->r14 = (ulong)sched;
.
248a
if(up != nil)
rem = ((char*)ureg)-up->kstack;
else
rem = ((char*)ureg)-((char*)(MACHADDR+sizeof(Mach)));
if(rem < 256)
panic("trap %d bytes remaining", rem);
.
247a
int rem;
.
84a
/* turn off all gpio interrupts */
gpioregs->rising = 0;
gpioregs->falling = 0;
gpioregs->edgestatus = gpioregs->edgestatus;
.
## diffname bitsy/trap.c 2001/0325
## diff -e /n/emeliedump/2000/1207/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0325/sys/src/9/bitsy/trap.c
89a
/* allow all enabled interrupts to take processor out of sleep mode */
intrregs->iccr = 0;
.
66,68d
63,64c
/* relocate the doze routine to a cache line boundary in cached mem */
doze = xspanalloc(12*sizeof(long), 16, 0);
memmove(doze, _doze, 12*sizeof(long));
.
46a
/*
* An cached line for the doze code
*/
.
41,43d
## diffname bitsy/trap.c 2001/0529
## diff -e /n/emeliedump/2001/0325/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0529/sys/src/9/bitsy/trap.c
614,615c
sp -= BY2WD+ERRMAX;
memmove((char*)sp, up->note[0].msg, ERRMAX);
.
604c
|| !okaddr(sp-ERRMAX-4*BY2WD, sizeof(Ureg)+ERRMAX+4*BY2WD, 1)){
.
578,579c
if(l > ERRMAX-15) /* " pc=0x12345678\0" */
l = ERRMAX-15;
.
534c
sp = oureg-4*BY2WD-ERRMAX;
.
253c
char buf[ERRMAX];
.
209c
char buf[ERRMAX];
.
175,176c
v->name = xalloc(strlen(name)+1);
strcpy(v->name, name);
.
136,137c
v->name = xalloc(strlen(name)+1);
strcpy(v->name, name);
.
25c
char *name; /* of driver, xallocated */
.
## diffname bitsy/trap.c 2001/0618
## diff -e /n/emeliedump/2001/0529/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0618/sys/src/9/bitsy/trap.c
755a
}
.
754c
if(up == 0){
print("no current proc\n");
.
53c
* set up for exceptions
.
51a
/* recover state after power suspend
* NB: to help debugging bad suspend code,
* I changed some prints below to iprints,
* to avoid deadlocks when a panic is being
* issued during the suspend/resume handler.
*/
void
trapresume(void)
{
vpage0 = (Vpage0*)EVECTORS;
memmove(vpage0->vectors, vectors, sizeof(vpage0->vectors));
memmove(vpage0->vtable, vtable, sizeof(vpage0->vtable));
wbflush();
mappedIvecEnable();
}
.
21,22d
10,19c
Intrregs *intrregs;
.
## diffname bitsy/trap.c 2001/0620
## diff -e /n/emeliedump/2001/0618/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0620/sys/src/9/bitsy/trap.c
782c
iprint("\n");
.
778c
iprint("\n");
.
772c
iprint("%.8lux=%.8lux ", l, v);
.
760c
iprint("no current proc\n");
.
428a
}
.
427c
if((ureg->psr & PsrMask) != PsrMusr) {
.
354d
342a
/* look for floating point instructions to interpret */
.
341d
265,266c
if(rem < 256) {
dumpstack();
panic("trap %d bytes remaining, up = 0x%lux, ureg = 0x%lux, at pc 0x%lux",
rem, up, ureg, ureg->pc);
}
.
## diffname bitsy/trap.c 2001/0621
## diff -e /n/emeliedump/2001/0620/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0621/sys/src/9/bitsy/trap.c
767c
iprint("ktrace /kernel/path %.8lux %.8lux %.8lux\n", ureg->pc, ureg->sp, ureg->r14);
.
124c
iprint("%s", buf);
.
101c
iprint("%s: icip %lux icmr %lux iclr %lux iccr %lux icfp %lux\n",
.
## diffname bitsy/trap.c 2001/0813
## diff -e /n/emeliedump/2001/0621/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0813/sys/src/9/bitsy/trap.c
215a
if (up == nil) {
warnregs(ureg, "kernel fault");
panic("fault: nil up in faultarm, accessing 0x%lux\n", va);
}
.
## diffname bitsy/trap.c 2001/0822
## diff -e /n/emeliedump/2001/0813/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0822/sys/src/9/bitsy/trap.c
464a
}else{
/* failure: save the error buffer for errstr */
kstrcpy(up->syserror, up->error, sizeof up->syserror);
.
## diffname bitsy/trap.c 2001/0924
## diff -e /n/emeliedump/2001/0822/sys/src/9/bitsy/trap.c /n/emeliedump/2001/0924/sys/src/9/bitsy/trap.c
467c
e = up->syserrstr;
up->syserrstr = up->errstr;
up->errstr = e;
.
428a
char *e;
.
## diffname bitsy/trap.c 2002/0114
## diff -e /n/emeliedump/2001/0924/sys/src/9/bitsy/trap.c /n/emeliedump/2002/0114/sys/src/9/bitsy/trap.c
435c
panic("syscall: pc 0x%lux r14 0x%lux cs 0x%lux\n", ureg->pc, ureg->r14, ureg->psr);
.
322c
panic("external abort 0x%lux pc 0x%lux addr 0x%lux\n", fsr, ureg->pc, va);
.
## diffname bitsy/trap.c 2002/0430
## diff -e /n/emeliedump/2002/0114/sys/src/9/bitsy/trap.c /n/emeliedump/2002/0430/sys/src/9/bitsy/trap.c
70a
hibernate = xspanalloc(8*sizeof(long), 16, 0);
memmove(hibernate, _hibernate, 8*sizeof(long));
.
68c
/* relocate the doze and hibernate routines
* to a cache line boundary in cached mem
*/
.
36a
void (*hibernate)(void);
.
34c
* A cached line for the doze and hibernate code
.
## diffname bitsy/trap.c 2002/0518
## diff -e /n/emeliedump/2002/0430/sys/src/9/bitsy/trap.c /n/emeliedump/2002/0518/sys/src/9/bitsy/trap.c
75a
#endif
.
73a
#ifdef notdef
.
## diffname bitsy/trap.c 2002/0604
## diff -e /n/emeliedump/2002/0518/sys/src/9/bitsy/trap.c /n/emeliedump/2002/0604/sys/src/9/bitsy/trap.c
69,77d
33,38d
## diffname bitsy/trap.c 2002/0615
## diff -e /n/emeliedump/2002/0604/sys/src/9/bitsy/trap.c /n/emeliedump/2002/0615/sys/src/9/bitsy/trap.c
681a
pexit("kproc exiting", 0);
.
199a
* disable an interrupt
*/
void
intrdisable(int type, int which, IntrHandler *f, void* a, char *name)
{
int irq;
Vctl **vp, *v;
if(type == IRQ){
irqdisable(which, f, a, name);
return;
}
/* from here down, it must be a GPIO edge interrupt */
irq = which;
if(which >= nelem(gpiovctl) || which < 0)
panic("intrdisable");
if(which > 11)
irq = 11;
lock(&vctllock);
for(vp = &gpiovctl[which]; v = *vp; vp = &v->next)
if (v->f == f && v->a == a && strcmp(v->name, name) == 0){
break;
}
if (gpiovctl[which] == nil){
/* set edge register to enable interrupt */
switch(type){
case GPIOboth:
print("intrdisable: gpio-rising+falling clear bit %d\n", which);
gpioregs->rising &= ~(1<<which);
gpioregs->falling &= ~(1<<which);
break;
case GPIOfalling:
print("intrdisable: gpio-falling clear bit %d\n", which);
gpioregs->falling &= ~(1<<which);
break;
case GPIOrising:
print("intrdisable: gpio-rising clear bit %d\n", which);
gpioregs->rising &= ~(1<<which);
break;
}
}
if (v) {
print("intrdisable: removing %s\n", name);
*vp = v->next;
}else
print("intrdisable: which %d, name %s not enabled\n", which, name);
unlock(&vctllock);
/* disable the gpio interrupt handler if necessary */
if(--gpioirqref[irq] == 0){
print("intrdisable: inrqdisable gpiointr\n");
irqdisable(irq, gpiointr, nil, "gpio edge");
}
free(v);
}
/*
.
193c
unlock(&vctllock);
.
178d
169c
v = malloc(sizeof(Vctl));
.
166c
panic("intrenable of output pin %d", which);
.
160c
panic("intrenable");
.
156a
print("intrenable %s, handler 0x%p\n", name, f);
.
143a
* disable an irq interrupt
*/
static void
irqdisable(int irq, IntrHandler *f, void* a, char *name)
{
Vctl **vp, *v;
if(irq >= nelem(vctl) || irq < 0)
panic("intrdisable");
lock(&vctllock);
for(vp = &vctl[irq]; v = *vp; vp = &v->next)
if (v->f == f && v->a == a && strcmp(v->name, name) == 0){
print("irqdisable: remove %s\n", name);
*vp = v->next;
free(v);
break;
}
if (v == nil)
print("irqdisable: irq %d, name %s not enabled\n", irq, name);
if (vctl[irq] == nil){
print("irqdisable: clear icmr bit %d\n", irq);
intrregs->icmr &= ~(1<<irq);
}
unlock(&vctllock);
}
/*
.
130c
print("irqenable %s, handler 0x%p\n", name, f);
v = malloc(sizeof(Vctl));
.
122c
static void
.
## diffname bitsy/trap.c 2002/0618
## diff -e /n/emeliedump/2002/0615/sys/src/9/bitsy/trap.c /n/emeliedump/2002/0618/sys/src/9/bitsy/trap.c
186,187d
130,131d
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