first commit

2026-06-04 17:52:04 +03:00
commit f5a98a9f0a
35 changed files with 2010 additions and 0 deletions
@@ -0,0 +1,48 @@
+#include "src/idt.h"
+#include "src/keyboard.h"
+#include "src/memory.h"
+#include "src/pic.h"
+#include "src/terminal.h"
+#include "src/util.h"
+#include "src/vga.h"
+
+__attribute__((interrupt)) void isr_divide_by_zero(struct interrupt_frame *frame) {
+  vga_set_string(VGA_HEIGHT - 1, 0, "EXCEPTION: divide by zero", 0x4F);
+  while (1)
+    ;
+}
+
+__attribute__((interrupt)) void isr_page_fault(struct interrupt_frame *frame) {
+  vga_set_string(VGA_HEIGHT - 1, 0, "EXCEPTION: page fault", 0x4F);
+  while (1)
+    ;
+}
+
+__attribute__((interrupt)) void isr_general_violation(struct interrupt_frame *frame) {
+  vga_set_string(VGA_HEIGHT - 1, 0, "EXCEPTION: general violation", 0x4F);
+  while (1)
+    ;
+}
+
+__attribute__((interrupt)) void isr_ata_primary(struct interrupt_frame *frame) {
+  outb(0x20, 0x20);
+  outb(0xA0, 0x20);
+}
+
+void kernel_main() {
+  pic_init();
+  idt_init();
+  outb(0x21, inb(0x21) | 0x01); // mask out timer interrupt
+  idt_set_entry(0, isr_divide_by_zero, 0x8E);
+  idt_set_entry(0x0E, isr_page_fault, 0x8E);
+  idt_set_entry(0x0D, isr_general_violation, 0x8E);
+  idt_set_entry(46, isr_ata_primary, 0x8E);
+  __asm__ volatile("sti");
+
+  memory_init();
+  keyboard_init();
+  terminal_init();
+
+  while (1)
+    ;
+}