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
}
void setup()
{
uint32_t memSize = 1024 + bootinfo->m_memoryLo + bootinfo->m_memoryHi*64;
// All data past the kernel is free to use
pmmngr_init(memSize,0x100000 + kernelSize * 512);
memory_region* region = (memory_region*)0x1000;
for(int i = 0;region[i].startLo != 0 || i == 0;i++)
{
if(region[i].type > 4)
region[i].type = 1;
if(region[i].type == 1)
pmmngr_init_region(region[i].startLo,region[i].sizeLo);
}
// Kernal location
pmmngr_deinit_region(0x100000,kernelSize * 512 + pmmngr_get_block_count() / PMMNGR_BLOCKS_PER_BYTE);
// c++ at exit runtime function pointers
pmmngr_deinit_region(0x50000,sizeof(unsigned) * 32);
// Boot data retained in bootinfo
pmmngr_deinit_region((physical_addr)bootinfo,sizeof(multiboot_info));
// Initialize DMA buffer here using deinit, not pmalloc()
pmmngr_deinit_region((physical_addr)DMA_BUFFER,0x200);
// Don't corrupt the stack
mmngr_stack_init(0x90000,0x16000);
hal_initialize();
kybrd_init(0x21);
install_interrupts();
vmmngr_initialize();
enable_interrupts();
flpydsk_set_working_drive(0);
flpydsk_install(0x26);
fsysFatInitialize();
return;
}
void start_kernel(struct multiboot *mbp, unsigned int magic,u32 esp)
{
u32 initrd_location = *((u32*)mbp->mods_addr);
u32 initrd_end = *(u32*)(mbp->mods_addr+4);
__asm__ __volatile__("cli");
cpu_init();
placement_pointer = initrd_end;
vmmngr_initialize(mbp->mem_upper + mbp->mem_lower);
kheap = _heapmngr_initialize(0x02000000, 0x20000000, 0x200000);
con_init();
init_IRQ();
time_init();
_kbd_init_hook();
/*setup_irq(2, &irq2);
setup_irq(3, &irq3 );
setup_irq(4, &irq4 );
setup_irq(5, &irq5 );
setup_irq(8, &irq8 );
*/
//auto_fpu();
task_initialize();
syscalls_install();
fs_root_initrd = install_initrd(initrd_location);
//pci_inst_check();
//enable_pci_master(0,3,0); //8139 need this
struct request *info = 0;
probe_ide(info);
hd_init_hook_();
putch('P');
double test = 3.14444;
printk("test ::: %d\n", test);
//serial_install();
//unsigned long cpu_khz = init_tsc();
//u32 *pf = (u32 *)0xffff0000;
//*pf = 10;
ext2_read_superblock();
register_filesystem();
__asm__ __volatile__("sti");
//graphics_install_bochs(1024,768);
//heaptest();
//create_thread(test_task,1);
while(1)
{
if(getch_polling() == 'i')
{
const char *filename = "test__2";
//execve__((char*)filename,0,0);
load_elf((char*)filename,0,0);
//show_state();
}
}
}
