started on isr/idt stuff

2026-06-11 23:23:39 -05:00
parent eb1e096bac
commit 5e823e570b
5 changed files with 186 additions and 0 deletions
--- a/kernel/interrupts.c
+++ b/kernel/interrupts.c
@@ -0,0 +1,46 @@
+#include "lib/print.h"
+#include <stdint.h>
+
+extern void master_eoi(void);
+
+struct registers {
+    uint32_t edi, esi, ebp, esp_dummy, ebx, edx, ecx, eax;
+    
+    uint32_t int_no;    
+    uint32_t error_code;
+    
+    uint32_t eip, cs, eflags, useresp, ss;
+};
+
+const char* err_messages[32] = {
+    [0] = "Divide by 0",
+    [1] = "",
+    [8] = "",
+    [13] = "General Protection Fault",
+    [14] = "Page Fault",
+};
+
+void common_interrupt_handler(struct registers *regs) {
+    switch (regs->int_no) {
+        case 0:
+        case 1:
+        case 8:
+        case 13:
+        case 14:
+            kprint("CPU Error: ");
+            kprint(err_messages[regs->int_no]);
+            kprint("\n");
+            break;
+        case 32:
+            // wake the PIC timer driver
+            master_eoi();
+            break;
+        case 33:    
+            // wake the keyboard driver
+            master_eoi();
+            break;
+        default:
+            kprint("Received unhandled interrupt\n");
+            return;
+    }
+}