Got IDT & ISRs working!

2025-03-21 14:09:15 +01:00
parent 05c8ee8f67
commit c3f8d7d8f2
9 changed files with 322 additions and 2 deletions
@@ -0,0 +1,28 @@
+#include <kernel.h>
+#include <string.h>
+#include <gdt.h>
+#include <idt.h>
+
+__align(16) // performace :fire:
+static struct idt_entry idt[IDT_ENTRIES];
+static struct idt_pointer idtp;
+
+void idt_setGate(uint8_t i, void* handler, uint8_t flags) {
+	uint32_t offset = (uint32_t)handler;
+	struct idt_entry* entry = &idt[i];
+	
+	entry->offsetLow = (uint16_t)offset;
+	entry->selector = GDT_KERNEL_CODE;
+	entry->flags = flags;
+	entry->offsetHigh = (uint16_t)(offset >> 16);
+}
+
+int idt_init(void) {
+	memset(&idt, 0, sizeof(idt));
+	idtp.limit = sizeof(idt);
+	idtp.base = (uint32_t)&idt;
+
+	__asm__ volatile ("lidt %0" : : "m"(idtp));
+	return 0;
+}
+