Added IDT Logic (Didn't actually add any IDTs)

2026-11-05 02:53:10 +00:00 · 2024-03-08 21:57:53 +01:00
parent 78135e4c7e
commit 861d843dcc
12 changed files with 83 additions and 1 deletions
@@ -0,0 +1,32 @@
+#include "idt.h"
+#include "stdint.h"
+
+struct idtEntry {
+    uint16_t offsetLow;
+    uint16_t selector;
+    uint8_t zero;
+    uint8_t typeAttr;
+    uint16_t offsetHigh;
+} __attribute__((packed));
+
+struct idtPointer {
+    uint16_t limit;
+    uint32_t base;
+} __attribute__((packed));
+
+struct idtEntry idt[256] = { 0 };
+struct idtPointer idtp;
+
+void idtSetGate(uint8_t i, uint32_t offset, uint16_t selector, uint8_t typeAttr) {
+    idt[i].offsetLow = (uint16_t)offset;
+    idt[i].selector = selector;
+    idt[i].zero = 0;
+    idt[i].typeAttr = typeAttr;
+    idt[i].offsetHigh = (uint16_t)(offset >> 16);
+}
+
+void setupIdt() {
+    idtp.limit = sizeof(struct idtEntry) * 256;
+    idtp.base = (uint32_t)&idt;
+}
+