void mac_clear_irq( unsigned int irq )
{
switch(IRQ_SRC(irq)) {
case 1: via_irq_clear(irq);
break;
case 2:
case 7: if (oss_present) {
oss_irq_clear(irq);
} else {
via_irq_clear(irq);
}
break;
case 3:
case 4:
case 5:
case 6: if (psc_present) {
psc_irq_clear(irq);
} else if (oss_present) {
oss_irq_clear(irq);
}
break;
case 8: if (baboon_present) {
baboon_irq_clear(irq);
}
break;
}
}
void via1_irq(int irq, void *dev_id, struct pt_regs *regs)
{
int irq_bit, i;
unsigned char events, mask;
mask = via1[vIER] & 0x7F;
if (!(events = via1[vIFR] & mask)) return;
for (i = 0, irq_bit = 1 ; i < 7 ; i++, irq_bit <<= 1)
if (events & irq_bit) {
via1[vIER] = irq_bit;
mac_do_irq_list(VIA1_SOURCE_BASE + i, regs);
via1[vIFR] = irq_bit;
via1[vIER] = irq_bit | 0x80;
}
#if 0 /* freakin' pmu is doing weird stuff */
if (!oss_present) {
/* This (still) seems to be necessary to get IDE
working. However, if you enable VBL interrupts,
you're screwed... */
/* FIXME: should we check the SLOTIRQ bit before
pulling this stunt? */
/* No, it won't be set. that's why we're doing this. */
via_irq_disable(IRQ_MAC_NUBUS);
via_irq_clear(IRQ_MAC_NUBUS);
mac_do_irq_list(IRQ_MAC_NUBUS, regs);
via_irq_enable(IRQ_MAC_NUBUS);
}
#endif
}
irqreturn_t via1_irq(int irq, void *dev_id)
{
int irq_num;
unsigned char irq_bit, events;
events = via1[vIFR] & via1[vIER] & 0x7F;
if (!events)
return IRQ_NONE;
irq_num = VIA1_SOURCE_BASE;
irq_bit = 1;
do {
if (events & irq_bit) {
via1[vIFR] = irq_bit;
m68k_handle_int(irq_num);
}
++irq_num;
irq_bit <<= 1;
} while (events >= irq_bit);
#if 0 /* freakin' pmu is doing weird stuff */
if (!oss_present) {
/* This (still) seems to be necessary to get IDE
working. However, if you enable VBL interrupts,
you're screwed... */
/* FIXME: should we check the SLOTIRQ bit before
pulling this stunt? */
/* No, it won't be set. that's why we're doing this. */
via_irq_disable(IRQ_MAC_NUBUS);
via_irq_clear(IRQ_MAC_NUBUS);
m68k_handle_int(IRQ_MAC_NUBUS);
via_irq_enable(IRQ_MAC_NUBUS);
}
#endif
return IRQ_HANDLED;
}
