kernel/kernel.c

   1 #include <tty.h>
   2 #include <io.h>
   3 #include <irq/idt.h>
   4 #include <irq/i8259a.h>
   5 #include <stdint.h>
   6
   7 extern void double_fault(struct abort_frame *frame);
   8 extern void keyb_handler(struct interrupt_frame *frame);
   9 struct idt_descriptor idt[256] __attribute__((aligned(0x10)));
  10 struct idtr idtr __attribute__((aligned(0x10)));
  11
  12 void _start(void)
  13 {
  14         screen_clear();
  15         kprint("Welcome to Nameless OS!\nRunning revision: ", 0);
  16         kprint(GIT_COMMIT, 0);
  17         kprint("\n", 0);
  18         kprint("Preparing IDT...\n", 0);
  19         idt_set_descriptor(idt, 0x8, 0x8, (uint32_t) double_fault, IDT_TRAP_GATE, 0x0);
  20         idt_set_descriptor(idt, 0x21, 0x8, (uint32_t) keyb_handler, IDT_INTERRUPT_GATE, 0x0);
  21         kprint("IDT prepared, loading...\n", 0);
  22         populate_idtr(&idtr, idt);
  23         load_idt(idtr);
  24         kprint("IDT loaded, enabling interrupts...\n", 0);
  25         pic_init(0x20, 0x28);
  26         pic_mask_all();
  27         pic_unmask(1);
  28         asm volatile ("sti");
  29         kprint("All done\n", 0);
  30         while(1);
  31 }