Panic and interrupts

Added a basic kernel panic function and interrupt support for x86_64 (mostly for exception handling)

src/arch/x86_64/idt.c

@@ -0,0 +1,41 @@
+#include <arch/idt.h>
+#include <arch/isr.h>
+#include <stdint.h>
+#include <stddef.h>
+
+idtentry_t idt[256];
+
+void idt_setentry(idtentry_t *e, uint64_t offset, uint16_t segment, uint16_t flags, uint8_t ist){
+	e->offset1 = offset & 0xFFFF;
+	e->offset2 = (offset >> 16) & 0xFFFF;
+	e->offset3 = (offset >> 32) & 0xFFFFFFFF;
+	e->segment = segment;
+	e->flags   = flags | ist;
+	e->reserved = 0;
+}
+
+static void idt_reload(){
+	
+	idtr_t idtr;
+	idtr.offset = (uint64_t)&idt;
+	idtr.size = sizeof(idt)-1;
+
+	asm("lidt (%%rax)": : "a"(&idtr) : "memory");
+
+}
+
+void idt_bspinit(){
+
+	for(size_t i = 0; i < 256; ++i){
+		idt_setentry(&idt[i], asmisr_general, 0x28, FLAGS_PRESENT | FLAGS_TYPE_INTERRUPT, 0);
+	}
+	
+	for(size_t i = 0; i < 32; ++i){
+		idt_setentry(&idt[i], asmisr_except, 0x28, FLAGS_PRESENT | FLAGS_TYPE_TRAP, 0);
+	}
+	
+	idt_reload();
+
+	asm("int $0x0");
+
+}