/*
* pit_init
* DESCRIPTION: Initialize the PIT called from kernel.c
* INPUTS: none
* OUTPUTS: None
* RETURN VALUE: none
* SIDE EFFECTS: sets PIT rate
*/
void pit_init(){
//setup the pit for scheduling
//Channel 0
//lobyte/hibyte
//Mode 3 (standard for OSes)
//set the mode register
outb(0x36,PIT_MODE_REG);
//set divider so rate is 10ms
uint16_t divider = PIT_DEFAULT_RATE/PIT_10_MS;
uint8_t lobyte,hibyte;
lobyte=divider & 0xFF;
hibyte=divider>>8;
outb(lobyte,PIT_0_DATA);
outb(hibyte,PIT_0_DATA);
scheduling_init();
}
void main(uint32_t magic, struct multiboot_info *mbi,
uintptr_t esp, uintptr_t stack_end)
{
stack_start = esp;
stack_size = stack_end - stack_start;
vga_driver = vga_init();
com_driver = serial_init();
logging_init(vga_driver, com_driver);
assert(magic == MULTIBOOT_MAGIC);
assert(mbi->flags & MULTIBOOT_LOADER);
kprintf(INFO, "\033\012Toutatis kernel booting from %s\033\017\n",
(char *)(mbi->boot_loader_name + (uint32_t)&kernel_voffset));
arch_init();
initrd_init(mbi);
assert(mbi->flags & MULTIBOOT_MEMINFO);
paging_init((mbi->mem_lower + mbi->mem_upper) * 1024);
paging_mark_reserved((uint32_t)mbi - (uint32_t)&kernel_voffset);
assert(mbi->flags & MULTIBOOT_MMAP);
for (mmap_entry_t *mmap = (mmap_entry_t *)(mbi->mmap_addr + (uint32_t)&kernel_voffset);
(uint32_t)mmap < mbi->mmap_addr + (uint32_t)&kernel_voffset + mbi->mmap_length;
mmap = (mmap_entry_t *)((uint32_t)mmap + mmap->size + sizeof(mmap->size))) {
if (mmap->type == 2) {
for (uint64_t i = 0; i < mmap->length; i += FRAME_SIZE) {
paging_mark_reserved((mmap->addr + i) & 0xfffff000);
}
}
}
paging_finalize();
void *p1 = kmalloc(8);
void *p2 = kmalloc(8);
*((char *)p1) = 'a';
kprintf(INFO, "p1 @ 0x%x\n", (uint32_t)p1);
kprintf(INFO, "p2 @ 0x%x\n", (uint32_t)p2);
kfree(p2);
kfree(p1);
void *p3 = kmalloc(16);
kprintf(INFO, "p3 @ 0x%x\n", (uint32_t)p3);
uintptr_t phys;
void *p4 = kmalloc_ap(0x1a0000, &phys);
memset(p4, 0, 0x1a0000);
*((char *)p4) = 'z';
kprintf(INFO, "p4 @ 0x%x phys = %x\n", (uint32_t)p4, phys);
void *p5 = kmalloc(0x02);
kprintf(INFO, "p5 @ 0x%x\n", (uint32_t)p5);
kfree(p5);
kfree(p4);
kfree(p3);
print_mmap(mbi);
syscall_init();
scheduling_init();
keyboard_init();
process_t *proc1 = create_process("Process 1", 1);
process_t *proc2 = create_process("Process 2", 1);
process_t *proc3 = create_process("Process 3", 1);
process_t *procs[] = { proc1, proc2, proc3 };
unsigned int k = 0;
unsigned int off = 0;
for (k = 0; k < 10; ++k) {
if (!create_thread(procs[k % 3], func2, (void *)(off + 80*2), 1, 0, 0)) {
kprintf(INFO, "Oups\n");
stop();
}
if (!create_thread(procs[k % 3], func1, (void *)k, 1, 1, 0)) {
kprintf(INFO, "Oups\n");
stop();
}
off += 2;
}
//create_thread(proc1, func3, (void *)0, 1, 1, 1);
k = 0;
unsigned int i = 0;
off = 0;
for (;;) {
uint16_t *video = (uint16_t *)(0xc00b8000 + 80);
*video = (uint16_t)alph[i++ % sizeof(alph)] | 0x0f00;
if (k % 1 == 0) {
//set_pos(0, 23);
//vga_print_dec(k);
//kprintf(INFO, "mem used: %6x num threads:%3d \n", mem_used(kheap), get_num_threads());
}
/*
if (!create_thread(proc1, func2, (void *)(off + 80*2), 1, 0, 0)) {
kprintf(INFO, "Oups\n");
break;
}
off += 2;
off %= (60 * (25-2));
*/
char c = keyboard_lastchar();
if (c == 'u') {
create_thread(proc1, func1, (void *)5, 1, 1, 0);
} else if (c == 'k') {
create_thread(proc1, func2, (void *)off, 1, 0, 0);
off += 2;
}
++k;
}
serial_terminate();
stop();
}
