set up bochs for debugging and started working on interrupts.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/kernel/idt.c b/src/kernel/idt.c
new file mode 100644
index 0000000..f3fea4f
--- /dev/null
+++ b/src/kernel/idt.c
@@ -0,0 +1,28 @@
+#include "idt.h"
+#include "gdt.h"
+#include <stdint.h>
+
+IDT_t idt = (IDT_t)0x7fffe;
+extern GDTR_t idtr;
+
+void get_idtr() {
+    int base = 0x7fffe;
+    uint8_t code_seg = (0b1000 << 3) | 0b000;
+
+    // idtr.size = sizeof(Gate_Descriptor_t) * n - 1;
+    idtr.size = 0;
+    idtr.offset = base;
+}
+
+Gate_Descriptor_t make_gate(uint32_t offset, uint8_t segment_selector,
+                            uint8_t type) {
+    Gate_Descriptor_t ret = (Gate_Descriptor_t){
+        .offset_low = offset,
+        .reserved = 0,
+        .attrs = (0b1000 << 4) | type,
+        .offset_high = offset >> 16,
+        .segment_selector = segment_selector,
+    };
+
+    return ret;
+}