/*
* Set interrupt target.
* Return previous value.
*/
u_int
setitr(u_int mid)
{
#if defined(MULTIPROCESSOR)
u_int v;
if (!CPU_ISSUN4M || sparc_ncpus <= 1)
return (0);
v = *((u_int *)ICR_ITR);
*((u_int *)ICR_ITR) = CPU_MID2CPUNO(mid);
return (v + 8);
#else
return (0);
#endif
}
/*
* On sun4ms we have to do some nasty stuff here. We need to map
* in the interrupt registers (since we need to find out where
* they are from the PROM, since they aren't in a fixed place), and
* disable all interrupts. We can't do this easily from locore
* since the PROM is ugly to use from assembly. We also need to map
* in the counter registers because we can't disable the level 14
* (statclock) interrupt, so we need a handler early on (ugh).
*
* NOTE: We *demand* the psl to stay at splhigh() at least until
* we get here. The system _cannot_ take interrupts until we map
* the interrupt registers.
*/
static void
bootstrap4m(void)
{
int node;
int nvaddrs, *vaddrs, vstore[10];
u_int pte;
int i;
extern void setpte4m(u_int, u_int);
if ((node = prom_opennode("/obio/interrupt")) == 0
&& (node = prom_finddevice("/obio/interrupt")) == 0)
panic("bootstrap: could not get interrupt "
"node from prom");
vaddrs = vstore;
nvaddrs = sizeof(vstore)/sizeof(vstore[0]);
if (prom_getprop(node, "address", sizeof(int),
&nvaddrs, &vaddrs) != 0) {
printf("bootstrap: could not get interrupt properties");
prom_halt();
}
if (nvaddrs < 2 || nvaddrs > 5) {
printf("bootstrap: cannot handle %d interrupt regs\n",
nvaddrs);
prom_halt();
}
for (i = 0; i < nvaddrs - 1; i++) {
pte = getpte4m((u_int)vaddrs[i]);
if ((pte & SRMMU_TETYPE) != SRMMU_TEPTE) {
panic("bootstrap: PROM has invalid mapping for "
"processor interrupt register %d",i);
prom_halt();
}
pte |= PPROT_S;
/* Duplicate existing mapping */
setpte4m(PI_INTR_VA + (_MAXNBPG * i), pte);
}
cpuinfo.intreg_4m = (struct icr_pi *)
(PI_INTR_VA + (_MAXNBPG * CPU_MID2CPUNO(bootmid)));
/*
* That was the processor register...now get system register;
* it is the last returned by the PROM
*/
pte = getpte4m((u_int)vaddrs[i]);
if ((pte & SRMMU_TETYPE) != SRMMU_TEPTE)
panic("bootstrap: PROM has invalid mapping for system "
"interrupt register");
pte |= PPROT_S;
setpte4m(SI_INTR_VA, pte);
/* Now disable interrupts */
icr_si_bis(SINTR_MA);
/* Send all interrupts to primary processor */
*((u_int *)ICR_ITR) = CPU_MID2CPUNO(bootmid);
#ifdef DEBUG
/* printf("SINTR: mask: 0x%x, pend: 0x%x\n", *(int*)ICR_SI_MASK,
*(int*)ICR_SI_PEND);
*/
#endif
}
