void kernel_early(multiboot_t *mboot, uint32_t magic, uintptr_t esp)
{
initialize_terminal();
terminal_writestring("[TTY] ... \x1b[32mDONE\n\x1b[00m[GDT] ... ");
initialize_gdt();
terminal_writestring("\x1b[32mDONE\n\x1b[00m[IDT] ... ");
initialize_idt();
terminal_writestring("\x1b[32mDONE\n\x1b[00m[IRQ] ... ");
initialize_irq();
__asm__ __volatile__("sti");
terminal_writestring("\x1b[32mDONE\n\x1b[00m[PAGE] ... ");
initialize_paging(mboot->mem_upper + mboot->mem_lower);
terminal_writestring("\x1b[32mDONE\n\x1b[00m");
}
int start_kernel(unsigned long magic, unsigned long addr)
{
multiboot_info_t *mbi;
int i=0;
/* Initialize GDT */
initialize_gdt();
screen_init_early();
screen_reset(0);
printf("Welcome to StarxOS!\n");
/* Am I booted by a Multiboot-compliant boot loader? */
if (magic != MULTIBOOT_BOOTLOADER_MAGIC) {
printf("Invalid magic number: %x\n", (unsigned) magic);
return -1;
}
/* Set MBI to the address of the Multiboot information structure. */
mbi = (multiboot_info_t *) addr;
/* Print out the flags. */
printf_bochs("Welcome to StarxOS!\n");
printf_bochs("flags = 0x%x\n", (unsigned) mbi->flags);
/* Are mem_* valid? */
if ( mbi->flags != 0)
printf_bochs ("mem_lower = %x Byte, mem_upper = %x Byte\n",
(unsigned) mbi->mem_lower * 0x400, (unsigned) mbi->mem_upper * 0x400);
printf_bochs("kernel code: %p\n", &code);
printf_bochs("kernel data: %p\n", &data);
printf_bochs("kernel bss : %p\n", &bss);
printf_bochs("kernel end : %p\n", &end);
/* Initialize IDT */
initialize_idt();
/* Initialize Timer */
init_timer(50);
/* Enable Interrupt */
asm volatile("sti");
mem_lower = mbi->mem_lower * 0x400;
mem_upper = mbi->mem_upper * 0x400;
/* Setup memory, and init frame_bitmap */
setup_memory(mem_lower, mem_upper);
/* Enable Paging */
init_paging();
/* Init heap */
init_kheap();
u32int *ptr = (u32int*)kmalloc(0x1000+2);
*ptr = 0x1234;
printf_bochs("ptr:%x *ptr:%x\n", ptr, *ptr);
u32int *ptr2 = (u32int*)kmalloc(0x1000+2);
*ptr2 = 0x4567;
printf_bochs("ptr2:%x *ptr2:%x\n", ptr2, *ptr2);
bochs_enter_debugger();
bochs_shutdown();
return 0xBAD;
}
