/*
* Enumerate I/O APICs and setup interrupt sources.
*/
static int
madt_setup_io(void)
{
void *ioapic;
u_int pin;
int i;
/* Try to initialize ACPI so that we can access the FADT. */
i = acpi_Startup();
if (ACPI_FAILURE(i)) {
printf("MADT: ACPI Startup failed with %s\n",
AcpiFormatException(i));
printf("Try disabling either ACPI or apic support.\n");
panic("Using MADT but ACPI doesn't work");
}
ioapics = malloc(sizeof(*ioapics) * (MAX_APIC_ID + 1), M_MADT,
M_WAITOK | M_ZERO);
/* First, we run through adding I/O APIC's. */
madt_walk_table(madt_parse_apics, NULL);
/* Second, we run through the table tweaking interrupt sources. */
madt_walk_table(madt_parse_ints, NULL);
/*
* If there was not an explicit override entry for the SCI,
* force it to use level trigger and active-low polarity.
*/
if (!madt_found_sci_override) {
if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic,
&pin) != 0)
printf("MADT: Could not find APIC for SCI IRQ %u\n",
AcpiGbl_FADT.SciInterrupt);
else {
printf(
"MADT: Forcing active-low polarity and level trigger for SCI\n");
ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
}
}
/* Third, we register all the I/O APIC's. */
for (i = 0; i <= MAX_APIC_ID; i++)
if (ioapics[i].io_apic != NULL)
ioapic_register(ioapics[i].io_apic);
/* Finally, we throw the switch to enable the I/O APIC's. */
acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
free(ioapics, M_MADT);
ioapics = NULL;
return (0);
}
/*
* Run through the MP table enumerating I/O APICs.
*/
static int
madt_setup_io(void)
{
int i;
/* First, we run through adding I/O APIC's. */
madt_walk_table(madt_parse_apics, NULL);
/* Second, we run through the table tweaking interrupt sources. */
madt_walk_table(madt_parse_ints, NULL);
/* Third, we register all the I/O APIC's. */
for (i = 0; i < NIOAPICS; i++)
if (ioapics[i].io_apic != NULL)
ioapic_register(ioapics[i].io_apic);
/* Finally, we throw the switch to enable the I/O APIC's. */
acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
return (0);
}
/*
* Run through the MP table enumerating I/O APICs.
*/
static int
mptable_setup_io(void)
{
int i;
u_char byte;
/* First, we count individual items and allocate arrays. */
mptable_count_items();
busses = malloc((mptable_maxbusid + 1) * sizeof(bus_datum), M_MPTABLE,
M_WAITOK);
for (i = 0; i <= mptable_maxbusid; i++)
busses[i].bus_type = NOBUS;
/* Second, we run through adding I/O APIC's and busses. */
mptable_parse_apics_and_busses();
/* Third, we run through the table tweaking interrupt sources. */
mptable_parse_ints();
/* Fourth, we register all the I/O APIC's. */
for (i = 0; i <= MAX_APIC_ID; i++)
if (ioapics[i] != NULL)
ioapic_register(ioapics[i]);
/* Fifth, we setup data structures to handle PCI interrupt routing. */
mptable_pci_setup();
/* Finally, we throw the switch to enable the I/O APIC's. */
if (mpfps->mpfb2 & MPFB2_IMCR_PRESENT) {
outb(0x22, 0x70); /* select IMCR */
byte = inb(0x23); /* current contents */
byte |= 0x01; /* mask external INTR */
outb(0x23, byte); /* disconnect 8259s/NMI */
}
return (0);
}
