static struct idt_descriptor idt[256] __attribute__((aligned(0x10)));
static struct idtr idtr __attribute__((aligned(0x10)));
-static struct page_directory_entry page_dir[1024] __attribute__((aligned(0x1000)));
-static struct page_table_entry page_table[1024] __attribute__((aligned(0x1000)));
void kmain(void)
{
screen_clear();
kprint("Welcome to Nameless OS!\nRunning revision: ", 0);
kprint(GIT_COMMIT, 0);
- kprint("\nEnabling paging...\n", 0);
- for (int i=0xb8; i < 0xc0; i++) {
- page_table[i].p = 1;
- page_table[i].rw = 0;
- page_table[i].us = 0;
- page_table[i].page_frame_addr = i;
- }
- for (int i=0x100; i < 0x102; i++) {
- page_table[i].p = 1;
- page_table[i].rw = 0;
- page_table[i].us = 0;
- page_table[i].page_frame_addr = i;
- }
- for (int i=0x102; i < 0x110; i++) {
- page_table[i].p = 1;
- page_table[i].rw = 1;
- page_table[i].us = 0;
- page_table[i].page_frame_addr = i;
- }
- page_dir[0].p = 1;
- page_dir[0].page_table_addr = (int) &page_table >> 12;
- enable_paging(page_dir);
+ kprint("\n", 0);
kprint("Preparing IDT...\n", 0);
idt_set_descriptor(idt, 8, 0x8, (uint32_t) double_fault, IDT_INTERRUPT_GATE, 0x0);
idt_set_descriptor(idt, 14, 0x8, (uint32_t) pf_handler, IDT_INTERRUPT_GATE, 0x0);
pic_unmask(1);
asm volatile ("sti");
kprint("All done\n", 0);
- struct idtr curr_idtr;
- asm ("sidt %0": "=m" (curr_idtr));
- kprintw(curr_idtr.limit);
- kprintd(curr_idtr.base);
- //kprint("Gonna force a double fault\n", 0);
- //int test = 1/0;
- //int test2 = *(int *) (0xa0000000);
while(1);
}