1 files changed, 33 insertions, 0 deletions
diff --git a/src/kernel/arch/amd64/interrupts/irq.c b/src/kernel/arch/amd64/interrupts/irq.c
new file mode 100644
index 0000000..74bc48c
--- /dev/null
+++ b/src/kernel/arch/amd64/interrupts/irq.c
@@ -0,0 +1,33 @@
+#include <kernel/arch/amd64/interrupts/irq.h>
+#include <kernel/arch/amd64/port_io.h>
+#include <stdint.h>
+
+static const int PIC1 = 0x20;
+static const int PIC2 = 0xA0;
+
+void irq_init(void) {
+	port_out8(PIC1, 0x11);   /* start init sequence */
+	port_out8(PIC2, 0x11);
+
+	port_out8(PIC1+1, 0x20); /* interrupt offsets */
+	port_out8(PIC2+1, 0x30);
+
+	port_out8(PIC1+1, 0x4);  /* just look at the osdev wiki lol */
+	port_out8(PIC2+1, 0x2);
+
+	port_out8(PIC1+1, 0x1);  /* 8086 mode */
+	port_out8(PIC2+1, 0x1);
+
+	uint8_t mask = 0xff;
+	mask &= ~(1 << 1); // keyboard
+	mask &= ~(1 << 4); // COM1
+
+	port_out8(PIC1+1, mask);
+	port_out8(PIC2+1, 0xff);
+}
+
+void irq_eoi(uint8_t line) {
+	port_out8(PIC1, 0x20);
+	if (line >= 8)
+		port_out8(PIC2, 0x20);
+}