+#include <stdint.h>
#include <tty.h>
+#include <io.h>
+#include <irq/idt.h>
+#include <irq/interrupt.h>
+#include <irq/i8259a.h>
+#include <input/ps2.h>
-const char *string = "Hello there!\n\n\
-Hopefully your machine manages to print this text.\n\
-If it did, that's great news because I managed to write a partial VGA driver.\n\n\
-Right now, the short-term roadmap is as follows:\n\n\
-* Complete the text-mode part of the VGA driver.\n\
-* Enable interrupts using the PIC.\n\
-* Write a driver for the Intel 8042 PS/2 controller so the OS can receive keystrokes.\n\
-* Once all that is done, it would be desirable to start the switch to userspace so the OS can actually be remotely usable.\n\n\
-Feel free to mess around with the code, although I doubt it will be very interesting at the moment.\n";
+struct idt_descriptor idt[256] __attribute__((aligned(0x10)));
+struct idtr idtr __attribute__((aligned(0x10)));
+extern void (*_int_handler_table[48])(void);
-void _start(void)
+void kmain(void)
{
+ int ps2_success;
screen_clear();
- kprint(string);
+ kprint("Welcome to Nameless OS!\nRunning revision: ", 0);
+ kprint(GIT_COMMIT, 0);
+ kprint("\n", 0);
+ kprint("Preparing IDT...\n", 0);
+ for (int i=0; i<48; i++) {
+ idt_set_descriptor(idt, i, 0x8, _int_handler_table[i], IDT_INTERRUPT_GATE, 0);
+ }
+ kprint("IDT prepared, loading...\n", 0);
+ populate_idtr(&idtr, idt);
+ load_idt(idtr);
+ kprint("Setting up interrupts...\n", 0);
+ pic_init(0x20, 0x28);
+ pic_mask_all();
+ ps2_success = ps2_initialize();
+ switch (ps2_success) {
+ case -1:
+ kprint("No PS/2 devices found or working, we will have no input\n", 0);
+ break;
+ case 0:
+ kprint("Found one working PS/2 device\n", 0);
+ break;
+ case 1:
+ kprint("Found two working PS/2 devices\n", 0);
+ }
+ asm volatile ("sti");
+ kprint("All done\n", 0);
+ while(1);
}