void
drsc_handler(void)
{
struct siop_softc *sc = drsc_softc;
siop_regmap_p rp;
int istat;
if (sc->sc_flags & SIOP_INTSOFF)
return; /* interrupts are not active */
rp = sc->sc_siopp;
istat = rp->siop_istat;
if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
return;
/*
* save interrupt status, DMA status, and SCSI status 0
* (may need to deal with stacked interrupts?)
*/
sc->sc_sstat0 = rp->siop_sstat0;
sc->sc_istat = istat;
sc->sc_dstat = rp->siop_dstat;
/*
* disable interrupts until the callback can process this
* interrupt.
*/
#ifdef DRSC_NOCALLBACK
(void)spl1();
siopintr(sc);
#else
rp->siop_sien = 0;
rp->siop_dien = 0;
sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI);
#ifdef DEBUG
if (*draco_intpen & DRIRQ_SCSI)
printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname,
*draco_intpen);
#endif
add_sicallback((sifunc_t)siopintr, sc, NULL);
#endif
return;
}
static int
iifun(int slot, int sr)
{
isa_intr_info_t *iinfo_p;
int s;
iinfo_p = &iinfo[slot];
/*
* Disable the interrupts
*/
if (slot == 0) {
single_inst_bclr_b(MFP->mf_imrb, IB_ISA1);
}
else {
single_inst_bclr_b(MFP->mf_imra, IA_ISA2);
}
if ((sr & PSL_IPL) >= (iinfo_p->ipl & PSL_IPL)) {
/*
* We're running at a too high priority now.
*/
add_sicallback((si_farg)iifun, (void*)slot, 0);
}
else {
s = splx(iinfo_p->ipl);
if (slot == 0) {
do {
MFP->mf_iprb = (u_int8_t)~IB_ISA1;
(void) (iinfo_p->ifunc)(iinfo_p->iarg);
} while (MFP->mf_iprb & IB_ISA1);
single_inst_bset_b(MFP->mf_imrb, IB_ISA1);
}
else {
do {
MFP->mf_ipra = (u_int8_t)~IA_ISA2;
(void) (iinfo_p->ifunc)(iinfo_p->iarg);
} while (MFP->mf_ipra & IA_ISA2);
single_inst_bset_b(MFP->mf_imra, IA_ISA2);
}
splx(s);
}
return 1;
}
