Init IDT

kernel/hal/x86_64/idt.c

@@ -0,0 +1,25 @@
+#include <stdint.h>
+#include "idt.h"
+#include "kprintf.h"
+
+#define ENTRIES 256
+static IdtGate idtgates[ENTRIES] = {0};
+static Idt idt;
+
+void idt_setgate(int i, uint64_t handler, uint8_t flags) {
+  idtgates[i].isrlow = (uint16_t)handler;
+  idtgates[i].kernelcs = 40;
+  idtgates[i].ist = 0;
+  idtgates[i].resv = 0;
+  idtgates[i].attrs = flags;
+  idtgates[i].isrmid = (uint16_t)(handler >> 16);
+  idtgates[i].isrhigh = (uint16_t)(handler >> 32);
+}
+
+void idt_init(void) {
+  idt.base = (uint64_t)&idtgates;
+  idt.limit = ENTRIES * sizeof(IdtGate) - 1;
+  asm volatile("lidt %0" :: "m"(idt) : "memory");
+
+  LOG("idt", "idt init\n");
+}