Exemple #1
0
int ldr_main(struct multiboot_info* boot_info, uint32 krnldr_size_bytes)
{
	SetColor(MakeColor(DARK_BLUE, WHITE));
	ClearScreen();

	if (krnldr_size_bytes > 40 KB)
		PANIC("Kernel Loader is too large");

	init_kallocations(KRN_LDR_BASE + krnldr_size_bytes, KRN_LDR_LIMIT);

	Print("Initializing descriptor tables.");

	INT_OFF;
	init_isr();
	init_descriptor_tables();
	init_pic();
	INT_ON;

	init_pit_timer(50, timer_callback);

	struct kernel_info* k_info = kalloc(sizeof(struct kernel_info));

	//setup AHCI
	HBA_MEM_t* abar = PCIFindAHCI();

	// initialize basic virtual memory
	vmmngr_initialize();

	uint32 ahci_base = kalloc_get_ptr() + 1024 - (uint32)kalloc_get_ptr() % 1024;
	init_ahci(abar, ahci_base);

	uint32 start, _length, position = 0;
	fsysSimpleFind("MeOs.exe", 1, &_length, &start);

	if (start == (uint32)-1 && _length == 0)
		PANIC("Kernel module could not be found!");

	while (position <= _length)
	{
		fsysSimpleRead(start + position / 512, 4096, KERNEL_BASE + position);
		position += 4096;
	}

	// after all the loading is done... enable paging
	vmmngr_paging_enable(true);

	k_info->kernel_size = _length;
	k_info->isr_handlers = interrupt_handlers;
	k_info->gdt_base = gdt_entries;
	k_info->idt_base = idt_entries;

	printfln("Executing kernel\0");
	execute_kernel(boot_info, k_info);

	ClearScreen();
	_asm cli
	_asm hlt
}
Exemple #2
0
int main(multiboot_t * mbp)
{
	cpu_state_t *cpu;

	// first is to save critical info from bootloader
	// and get symbol tables so we can print back traces
	mbootp = mbp;
	init_debug(mbp);

	// reset text-mode
	c80_clear();
	printk_color(rc_black, rc_red, "\t\t\t\tRed Magic\n");

	// init processors
	init_bootstrap_processor();
	cpu = get_boot_processor();
	ASSERT(cpu != NULL);

	// initialize descriptors
	init_global_descriptor_table(cpu);
	init_interrupt_descriptor_table();
	init_io_apic();

	// interrupt on
	local_irq_enable();

	// memory management
	show_kernel_pos();
	show_ARDS_from_multiboot(mbp);
	init_paging();
	init_kheap();

	// initialize devices and rootfs
	init_dev();
	//init_root_fs();

	// start all APs
	if (mpinfo.ismp)
		start_smp();

	// start system clock
	if (!mpinfo.ismp)
		init_pit_timer(CLOCK_INT_HZ);
	else
		init_apic_timer(CLOCK_INT_HZ);

	// initialize kernel task and scheduling
	setup_init_task();
	init_sched();

	// All our initialisation calls will go in here.
	return 0xDEADBABA;
}