void main(void) /* This really IS void, no error here. */
{ /* The startup routine assumes (well, ...) this */
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
time_init();
tty_init();
trap_init();
sched_init();
buffer_init();
hd_init();
sti();
move_to_user_mode();
if (!fork()) { /* we count on this going ok */
init();
}
/*
* NOTE!! For any other task 'pause()' would mean we have to get a
* signal to awaken, but task0 is the sole exception (see 'schedule()')
* as task 0 gets activated at every idle moment (when no other tasks
* can run). For task0 'pause()' just means we go check if some other
* task can run, and if not we return here.
*/
for(;;) pause();
}
int main(void)
{
/* Interrupts are still disabled. Do necessary setups, then enable them. */
time_init();
tty_init();
trap_init();
sched_init();
buffer_init();
hd_init();
sti();
move_to_user_mode();
if (!fork()) { /* we count on this going ok */
init();
}
/*
* NOTE!!
* For any other task 'pause()' would mean we have to get a signal to awaken,
* but task 0 gets activated at every idle moment (when no other tasks can run).
* For task0 'pause()' just means we go check if some other task can run, and
* if not we return here.
*/
// for(;;) pause();
return 0;
}
int main(void)
{
/* NOTE! 这些初始化函数的位置别随便改动! */
trap_init(); /* 在设置其他中断之前 */
console_init(); /* 需打印的在这之后 */
keyboard_init();
hd_init(); /* 需读磁盘的放其后 */
/* graph_init(); */
mem_init();
sched_init();
buff_init(); /* 在内存初始化之后 */
inode_init();
file_table_init();
debug_init();
sti();
super_init(0); /* 开中断之后 */
files_init();
/* unsigned short color = rgb_to_565color(255,255,255);
draw_rect(0, 0, 800, 600, color, 1); */
move_to_user_mode();
/*
* 进程0马上execve()，替换掉用户态空间，这样进程0就
* 可以写时复制了。注意此时原来的用户态堆栈也被丢弃
* 了，换成了新堆栈。更多参见内存管理。
*/
if(!execve("/init"))
printf("main: execve init-process failed.\n");
/* the kernel main func */
int pretty_main()
{
start_kernel();
move_to_user_mode();
/* from kernel mode to user mode and scheduler process */
return 0;
}
void main(void) /* This really IS void, no error here. */
{ /* The startup routine assumes (well, ...) this */
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
ROOT_DEV = ORIG_ROOT_DEV;
drive_info = DRIVE_INFO;
memory_end = (1<<20) + (EXT_MEM_K<<10);
memory_end &= 0xfffff000;
if (memory_end > 16*1024*1024)
memory_end = 16*1024*1024;
if (memory_end > 12*1024*1024)
buffer_memory_end = 4*1024*1024;
else if (memory_end > 6*1024*1024)
buffer_memory_end = 2*1024*1024;
else
buffer_memory_end = 1*1024*1024;
main_memory_start = buffer_memory_end;
#ifdef RAMDISK
main_memory_start += rd_init(main_memory_start, RAMDISK*1024);
#endif
mem_init(main_memory_start,memory_end);
trap_init();
blk_dev_init();
chr_dev_init();
tty_init();
time_init();
sched_init();
buffer_init(buffer_memory_end);
hd_init();
floppy_init();
sti();
move_to_user_mode();
setup((void *) &drive_info);
(void) open("/dev/tty0",O_RDWR,0);
(void) dup(0);
(void) dup(0);
(void) open("/var/process.log",O_CREAT|O_TRUNC|O_WRONLY,0666);
#ifdef dis_func
(void) open("/var/dis_func.log",O_CREAT|O_TRUNC|O_WRONLY,0666);
#endif
if (!fork()) { /* we count on this going ok */
init();
}
/*
* NOTE!! For any other task 'pause()' would mean we have to get a
* signal to awaken, but task0 is the sole exception (see 'schedule()')
* as task 0 gets activated at every idle moment (when no other tasks
* can run). For task0 'pause()' just means we go check if some other
* task can run, and if not we return here.
*/
for(;;) pause();
}
int main(void)
{
trap_init();
sched_init();
sti();
move_to_user_mode();
myprint("In kernel");
while(1){}
return 0;
}
/*
* This is the kernel main routine. When the boot process is completed, this
* function is called.
*/
void start_kernel(void) {
int pid, i;
char *names[N_CONSOLES] = { "PRG1", "PRG2", "PRG3",
"PRG4", "PRG5", "PRG6" };
// init traps
init_traps();
// initialize IRQs
init_irq();
// initialize the tty driver. The tty is composed by a keyboard driver
// that read input keys a print the relative ASCII code on video.
tty_init();
// initialize the timer.
time_init();
// initialize the scheduler
sched_init();
printk("Kernel info: %u bytes, start at 0x%x0 end at 0x%x0.\n",
&__KERNEL_END__-K_START, K_START, &__KERNEL_END__);
sti();
// calibrate delay
calibrate_delay();
// floppy driver initialization
floppy_init();
// switch in user mode
move_to_user_mode();
// for a process for each console and execute the program PRGi
for (i=0; i<N_CONSOLES; ++i) {
// spawn process i and run PRG1
pid = fork();
if (pid == 0) {
exec(names[i]);
} else if (pid < 0) {
print("idle: cannot duplicate myself.\n");
}
}
print("Idle: ok!\n");
// idle loop
while(1);
}
void main(void) /* This really IS void, no error here. */
{ /* The startup routine assumes (well, ...) this */
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
ROOT_DEV = ORIG_ROOT_DEV;
drive_info = DRIVE_INFO;
memory_end = (1<<20) + (EXT_MEM_K<<10);
memory_end &= 0xfffff000;
if (memory_end > 16*1024*1024)
memory_end = 16*1024*1024;
if (memory_end > 12*1024*1024)
buffer_memory_end = 4*1024*1024;
else if (memory_end > 6*1024*1024)
buffer_memory_end = 2*1024*1024;
else
buffer_memory_end = 1*1024*1024;
main_memory_start = buffer_memory_end;
#ifdef RAMDISK
main_memory_start += rd_init(main_memory_start, RAMDISK*1024);
#endif
mem_init(main_memory_start,memory_end);
trap_init(); /* set the IDT in 0x00080000~0x000807ff(4KB)*/
blk_dev_init();
chr_dev_init(); /* this function do nothing */
tty_init(); /* rs_init() and con_init() */
time_init();
sched_init();
buffer_init(buffer_memory_end);
hd_init();
floppy_init();
sti();
move_to_user_mode();
if (!fork()) { /* we count on this going ok */
init();
}
/*
* NOTE!! For any other task 'pause()' would mean we have to get a
* signal to awaken, but task0 is the sole exception (see 'schedule()')
* as task 0 gets activated at every idle moment (when no other tasks
* can run). For task0 'pause()' just means we go check if some other
* task can run, and if not we return here.
*/
for(;;) pause();
}
//init process pid = 0;
static void start_kernel()
{
// init_trap();// define in kernel/start.c
init_clock(); //clock interrupt init
main_memory_end = (1<<20) + (EXT_MEM_K << 10);
main_memory_end &= 0xfffff000;
if(main_memory_end > 12 * 1024 * 1024) //内存大于6M时
{
buffer_memory_start = 3 * 1024 * 1024;
buffer_memory_end = 4 * 1024 * 1024;
}
else
{
buffer_memory_start = 3 * 1024 * 1024 - 512 * 1024;
buffer_memory_end = 3 * 1024 * 1024;
}
main_memory_start = buffer_memory_end; //主内存的起始地址 = 缓冲区末端
main_memory_start &= 0xfffff000;
printk("start memroy = %d\t end memory = %d\n",main_memory_start,main_memory_end);
// buffer_memory_end = (buffer_memory_end + BUFFER_SIZE) & (~BUFFER_SIZE)- 1; //align BUFFER_SIZE
init_buffer(buffer_memory_start,buffer_memory_end); //buffer init
paging_init(main_memory_start,main_memory_end);
init_mem(main_memory_start,main_memory_end); //memeory management init
init_hd(); //hard disk init
init_fs(); //filesystem init
// init_sock();
move_to_user_mode();
while(1){}
}