/*
* PCI Interrupt handling
*/
int
octeon_pcibus_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
#if 0
struct octeon_pcibus_softc *sc = pa->pa_pc->pc_intr_v;
#endif
int bus, dev, fn, pin;
*ihp = (pci_intr_handle_t)-1;
if (pa->pa_intrpin == 0) /* no interrupt needed */
return 1;
#ifdef DIAGNOSTIC
if (pa->pa_intrpin > 4) {
printf("%s: bad interrupt pin %d\n", __func__, pa->pa_intrpin);
return 1;
}
#endif
pci_decompose_tag(pa->pa_pc, pa->pa_tag, &bus, &dev, &fn);
if (pa->pa_bridgetag) {
pin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin, dev);
*ihp = pa->pa_bridgeih[pin - 1];
} else {
if (bus == 0)
*ihp = octeon_pcibus_intr_map(dev, fn, pa->pa_intrpin);
if (*ihp == (pci_intr_handle_t)-1)
return 1;
}
return 0;
}
int
dec_alphabook1_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
pcitag_t bustag = pa->pa_intrtag;
int buspin, device;
#ifdef notyet
if (pa->pa_bridgetag) {
buspin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin,
pa->pa_device);
if (pa->pa_bridgeih[buspin - 1] == 0)
return 1;
*ihp = pa->pa_bridgeih[buspin - 1];
return 0;
}
#endif
buspin = pa->pa_intrpin;
pci_decompose_tag(pa->pa_pc, bustag, NULL, &device, NULL);
/*
* There are only two interrupting PCI devices on the AlphaBook:
* the SCSI and PCMCIA controllers. The other PCI device is the
* SIO, and there are no option slots available.
*
* NOTE! Apparently, there was a later AlphaBook which uses
* a different interrupt scheme, and has a built-in Tulip Ethernet
* interface! We do not handle that here!
*/
switch (device) {
case 6: /* NCR SCSI */
*ihp = 14;
return 0;
case 8: /* Cirrus CL-PD6729 */
*ihp = 15;
return 0;
default:
return 1;
}
}
int
pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
int pin = pa->pa_rawintrpin;
int line = pa->pa_intrline;
#if NIOAPIC > 0
struct mp_intr_map *mip;
int bus, dev, func;
#endif
if (pin == 0) {
/* No IRQ used. */
goto bad;
}
if (pin > PCI_INTERRUPT_PIN_MAX) {
printf("pci_intr_map: bad interrupt pin %d\n", pin);
goto bad;
}
ihp->tag = pa->pa_tag;
ihp->line = line;
ihp->pin = pin;
#if NIOAPIC > 0
pci_decompose_tag(pa->pa_pc, pa->pa_tag, &bus, &dev, &func);
if (mp_busses != NULL) {
int mpspec_pin = (dev << 2) | (pin - 1);
if (bus < mp_nbusses) {
for (mip = mp_busses[bus].mb_intrs;
mip != NULL; mip = mip->next) {
if (&mp_busses[bus] == mp_isa_bus ||
&mp_busses[bus] == mp_eisa_bus)
continue;
if (mip->bus_pin == mpspec_pin) {
ihp->line = mip->ioapic_ih | line;
return 0;
}
}
}
if (pa->pa_bridgetag) {
int swizpin = PPB_INTERRUPT_SWIZZLE(pin, dev);
if (pa->pa_bridgeih[swizpin - 1].line != -1) {
ihp->line = pa->pa_bridgeih[swizpin - 1].line;
ihp->line |= line;
return 0;
}
}
/*
* No explicit PCI mapping found. This is not fatal,
* we'll try the ISA (or possibly EISA) mappings next.
*/
}
#endif
/*
* Section 6.2.4, `Miscellaneous Functions', says that 255 means
* `unknown' or `no connection' on a PC. We assume that a device with
* `no connection' either doesn't have an interrupt (in which case the
* pin number should be 0, and would have been noticed above), or
* wasn't configured by the BIOS (in which case we punt, since there's
* no real way we can know how the interrupt lines are mapped in the
* hardware).
*
* XXX
* Since IRQ 0 is only used by the clock, and we can't actually be sure
* that the BIOS did its job, we also recognize that as meaning that
* the BIOS has not configured the device.
*/
if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION)
goto bad;
if (line >= NUM_LEGACY_IRQS) {
printf("pci_intr_map: bad interrupt line %d\n", line);
goto bad;
}
if (line == 2) {
printf("pci_intr_map: changed line 2 to line 9\n");
line = 9;
}
#if NIOAPIC > 0
if (mp_busses != NULL) {
if (mip == NULL && mp_isa_bus) {
for (mip = mp_isa_bus->mb_intrs; mip != NULL;
mip = mip->next) {
if (mip->bus_pin == line) {
ihp->line = mip->ioapic_ih | line;
return 0;
}
}
}
#if NEISA > 0
if (mip == NULL && mp_eisa_bus) {
for (mip = mp_eisa_bus->mb_intrs; mip != NULL;
mip = mip->next) {
if (mip->bus_pin == line) {
ihp->line = mip->ioapic_ih | line;
return 0;
}
}
}
#endif
if (mip == NULL) {
printf("pci_intr_map: "
"bus %d dev %d func %d pin %d; line %d\n",
bus, dev, func, pin, line);
printf("pci_intr_map: no MP mapping found\n");
}
}
#endif
return 0;
bad:
ihp->line = -1;
return 1;
}