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apic: fix arch_ioapic_setirq

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Christopher Fandrich
2026-01-28 01:12:35 -08:00
parent 79466293b7
commit deec4678c1
1 changed files with 3 additions and 3 deletions
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kernel-src/arch/x86-64/apic.c
+3 -3
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@@ -135,15 +135,15 @@ void arch_apic_init_perf(void) {
void arch_ioapic_setirq(uint8_t irq, uint8_t vector, uint8_t proc, bool masked) {
// default settings for ISA irqs
uint8_t polarity = 1; // active high
uint8_t polarity = 0; // active high
uint8_t trigger = 0; // edge triggered
for (uintmax_t i = 0; i < override_count; ++i) {
struct acpi_madt_interrupt_source_override *override = getentry(ACPI_MADT_ENTRY_TYPE_INTERRUPT_SOURCE_OVERRIDE, i);
if (override->source != irq)
continue;
polarity = override->flags & 2 ? 1 : 0; // active low
trigger = override->flags & 8 ? 1 : 0; // level triggered
polarity = ((override->flags & 0b11) == 0b11) ? 1 : 0; // active low : active high
trigger = (((override->flags >> 2) & 0b11) == 0b11) ? 1 : 0; // level triggered : edge triggered
irq = override->gsi;
break;
}