void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
i386_detect_memory();
i386_vm_init();
page_init();
page_check();
// Lab 3 user environment initialization functions
env_init();
idt_init();
// Lab 4 multitasking initialization functions
pic_init();
kclock_init();
// Should always have an idle process as first one.
ENV_CREATE(user_idle);
// Start fs.
ENV_CREATE(fs_fs);
ENV_CREATE(user_icode);
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE2(TEST, TESTSIZE)
#else
// Touch all you want.
// ENV_CREATE(user_icode);
// ENV_CREATE(user_pipereadeof);
// ENV_CREATE(user_pipewriteeof);
// ENV_CREATE(user_testpipe);
// ENV_CREATE(user_primespipe);
// ENV_CREATE(user_testpiperace);
// ENV_CREATE(user_testpiperace2);
// ENV_CREATE(user_testfdsharing);
#endif // TEST*
// Should not be necessary - drain keyboard because interrupt has given up.
kbd_intr();
// Schedule and run the first user environment!
sched_yield();
}
void uart_init(uint8_t uart, __unused uint8_t interrupts)
{
/* no interrupts, only polling so far */
uart_reg_write(uart, IER, 0x00);
if (uart == CONS_UART_NR) {
cons_init();
} else {
sercomm_init();
uart_irq_enable(uart, UART_IRQ_RX_CHAR, 1);
}
uart_reg_write(uart, AUTOBAUD_EN, 0x00); /* disable AUTOBAUD */
uart_reg_write(uart, EFR, 0x10); /* Enhanced Features Register */
/* no XON/XOFF flow control, ENHANCED_EN, no auto-RTS/CTS */
uart_reg_write(uart, EFR, (1 << 4));
/* enable Tx/Rx FIFO, Tx trigger at 56 spaces, Rx trigger at 60 chars */
//FIXME check those FIFO settings
uart_reg_write(uart, IIR, FIFO_EN | RX_FIFO_CLEAR | TX_FIFO_CLEAR |
(3 << TX_FIFO_TRIG_SHIFT) | (1 << RX_FIFO_TRIG_SHIFT));
/* RBR interrupt only when TX FIFO and TX shift register are empty */
uart_reg_write(uart, SCR, (1 << 0));// | (1 << 3));
/* 8 bit, 1 stop bit, no parity, no break */
uart_reg_write(uart, LCR, 0x03);
uart_set_lcr7bit(uart, 0);
}
void _benmain(void)
{
struct FIFO32 fifo;
int keybuf[128]={0};
fifo32_init(&fifo, 128, keybuf);
struct TSS32 tss_a = {0};
cons_init();
env_init();
/* keyboard setting */
init_kb(&fifo, 256);
tss_a.ldtr = 0;
tss_a.iomap = 0x40000000;
set_segmdesc(gdt + 0, 103, (int) &tss_a, AR_TSS32);
task_init(memman);
/* Unfortunate try the switch back to 0*8 (_benmain) with farjmp but not working.
* And the reason still unknown.
* So that I use another thread_kb_io() to catch the keyboard interrupt.
*/
load_tr(0 * 8); // record current working task to tss_a
task_create((int) &thread_kb_io, memman, "bshell", 1);
task_create((int) &thread_events, memman, "events", 0);
/* strange issue encountered if run pci_init at the setup_hw() */
puts("pci scan bus\n");
pci_init();
farjmp(0, 4*8);
puts("\nSystem Halted \n");
_syshalt();
}
void
i386_init(void)
{
extern char edata[], end[];
extern const uint32_t sctors[], ectors[];
const uint32_t *ctorva;
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
// Then call any global constructors.
// This relies on linker script magic to define the 'sctors' and
// 'ectors' symbols; see kern/kernel.ld.
// Call after cons_init() so we can cprintf() if necessary.
for (ctorva = ectors; ctorva > sctors; )
((void(*)()) *--ctorva)();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
mem_init();
// Lab 2 interrupt and gate descriptor initialization functions
idt_init();
// Test IDT (lab 2 only)
__asm__ __volatile__("int3");
cprintf("Breakpoint succeeded!\n");
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
mem_init();
// Lab 3 user environment initialization functions
env_init();
trap_init();
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE(TEST, ENV_TYPE_USER);
#else
// Touch all you want.
ENV_CREATE(user_hello, ENV_TYPE_USER);
#endif // TEST*
// We only have one user environment for now, so just run it.
env_run(&envs[0]);
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
i386_detect_memory();
i386_vm_init();
page_init();
page_check();
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
int
kern_init(void) {
extern char edata[], end[];
memset(edata, 0, end - edata);
cons_init(); // init the console
const char *message = "(THU.CST) os is loading ...";
kprintf ("%s\n\n", message);
/* Only to initialize lcpu_count. */
mp_init ();
pmm_init(); // init physical memory management
pmm_init_ap ();
pic_init(); // init interrupt controller
vmm_init(); // init virtual memory management
sched_init(); // init scheduler
proc_init(); // init process table
sync_init(); // init sync struct
ide_init(); // init ide devices
swap_init(); // init swap
fs_init(); // init fs
clock_init(); // init clock interrupt
intr_enable(); // enable irq interrupt
cpu_idle(); // run idle process
}
void
i386_init(void)
{
extern char edata[], end[];
// Lab1 only
char chnum1 = 0, chnum2 = 0, ntest[256] = {};
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!%n\n%n", 6828, &chnum1, &chnum2);
cprintf("pading space in the right to number 22: %-8d.\n", 22);
cprintf("chnum1: %d chnum2: %d\n", chnum1, chnum2);
cprintf("%n", NULL);
memset(ntest, 0xd, sizeof(ntest) - 1);
cprintf("%s%n", ntest, &chnum1);
cprintf("chnum1: %d\n", chnum1);
cprintf("show me the sign: %+d, %+d\n", 1024, -1024);
// Lab 2 memory management initialization functions
mem_init();
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
static void handle_keypress(char c)
{
amr_t handler = c == 'G' ? __run_mon : __cons_add_char;
send_kernel_message(core_id(), handler, (long)&cons_buf, (long)c, 0,
KMSG_ROUTINE);
cons_init();
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
// int x = 1, y = 3, z = 4;
// cprintf("x %d, y %x, z %d\n", x, y, z);
// unsigned int i = 0x00646c72;
// cprintf("H%x Wo%s\n", 57616, &i);
// cprintf("x=%d y=%d", 3, 4);
// cprintf("x=%d y=%d", 3);
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
mem_init();
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
int main(void){
cli();
cons_init();
mm_init();
trap_init();
god_init();
}
int main( int argc, char* argv[] )
{
FILE* f = stdout;
if ( argc == 2 )
{ f = fopen(argv[1], "r");
if( f==NULL || ferror(f) )
{ printf("File didnt open or something.\n"); return -1;}
}
if ( argc > 2 )
{ printf("Note: anything more then first argument is ignored."); }
cons_init(1024);
printf( "Initiated.\n" );
printf("File %s opened.\n", argv[1]);
printf("Reading file.\n");
Obj obj=// read_obj(f);
Obj_Cons(read_cons(f));
printf("Printing next.\n");
Obj_print(obj, printing_print,NULL);
printf("\nClean up.\n");
Obj_exit(obj);
printf("\nClosing file, de-initiating.\n");
if( argc==2 ){ fclose(f); }
cons_exit();
}
/**
* The entry.
*/
int main(int argc, char *argv[], char *envp[])
{
if (ginfo->status == STATUS_DEBUG)
raise(SIGTRAP);
cons_init();
const char *message = "(THU.CST) os is loading ...";
kprintf("%s\n\n", message);
intr_init();
ide_init();
host_signal_init();
/* Only to initialize lcpu_count. */
mp_init();
pmm_init();
pmm_init_ap();
vmm_init();
sched_init();
proc_init();
swap_init();
fs_init();
sync_init();
umclock_init();
cpu_idle();
host_exit(SIGINT);
return 0;
}
int __noreturn
kern_init(void) {
extern char edata[], end[];
memset(edata, 0, end - edata);
cons_init(); // init the console
const char *message = "(THU.CST) os is loading ...";
cprintf("%s\n\n", message);
print_kerninfo();
pmm_init(); // init physical memory management
pic_init(); // init interrupt controller
idt_init(); // init interrupt descriptor table
vmm_init(); // init virtual memory management
sched_init(); // init scheduler
proc_init(); // init process table
sync_init(); // init sync struct
ide_init(); // init ide devices
swap_init(); // init swap
fs_init(); // init fs
clock_init(); // init clock interrupt
intr_enable(); // enable irq interrupt
cpu_idle(); // run idle process
}
void i386_init(void)
{
extern char edata[], end[];
/* before doing anything else, complete the ELF loading process;
clear the uninitialized global data (BSS) section of our program;
this ensures that all static/global variables start out zero */
memset(edata, 0, end - edata);
/* initialize the console; can't call cprintf until after we do this */
cons_init();
cprintf("\n*** Welcome to Jake, The Java Kernel! ***");
cprintf("\nCopyright (C) 2011. Enterprise Java Systems.\n\n");
/* test the stack backtrace function */
test_backtrace(5);
/* memory setup */
i386_detect_memory();
i386_vm_init();
/* drop into the kernel monitor */
while (1)
monitor(NULL);
}
void i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
//check page_alloc() this is a test,not my code
check_page_alloc();
// Test the stack backtrace function (lab 1 only)
test_backtrace(5);
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
int
kern_init(void) {
extern char edata[], end[];
memset(edata, 0, end - edata);
cons_init(); // init the console
const char *message = "(THU.CST) os is loading ...";
cprintf("%s\n\n", message);
print_kerninfo();
grade_backtrace();
pic_init(); // init interrupt controller
idt_init(); // init interrupt descriptor table
pmm_init(); // init physical memory management
vmm_init(); // init virtual memory management
sched_init(); // init scheduler
proc_init(); // init process table
swap_init(); // init swap
fs_init(); // init fs
clock_init(); // init clock interrupt
intr_enable(); // enable irq interrupt
//LAB1: CAHLLENGE 1 If you try to do it, uncomment lab1_switch_test()
// user/kernel mode switch test
//lab1_switch_test();
cpu_idle(); // run idle process
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
i386_detect_memory();
i386_vm_init();
// Lab 3 user environment initialization functions
env_init();
idt_init();
// Lab 4 multitasking initialization functions
pic_init();
kclock_init();
time_init();
pci_init();
// Should always have an idle process as first one.
ENV_CREATE(user_idle);
// Start fs.
ENV_CREATE(fs_fs);
#if !defined(TEST_NO_NS)
// Start ns.
ENV_CREATE(net_ns);
#endif
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE2(TEST, TESTSIZE);
#else
// Touch all you want.
// ENV_CREATE(net_testoutput);
// ENV_CREATE(user_echosrv);
// ENV_CREATE(user_httpd);
// ENV_CREATE(user_writemotd);
// ENV_CREATE(user_testfile);
ENV_CREATE(user_icode);
// ENV_CREATE(user_primes);
#endif // TEST*
// Schedule and run the first user environment!
sched_yield();
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
mem_init();
// Lab 3 user environment initialization functions
env_init();
trap_init();
// Lab 4 multiprocessor initialization functions
mp_init();
lapic_init();
// Lab 4 multitasking initialization functions
pic_init();
// Acquire the big kernel lock before waking up APs
// Your code here:
lock_kernel();
// Starting non-boot CPUs
boot_aps();
// Start fs.
ENV_CREATE(fs_fs, ENV_TYPE_FS);
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE(TEST, ENV_TYPE_USER);
#else
// Touch all you want.
//<<<<<<< HEAD
ENV_CREATE(user_icode, ENV_TYPE_USER);
//=======
// ENV_CREATE(user_dumbfork, ENV_TYPE_USER);
//>>>>>>> lab4
#endif // TEST*
// Should not be necessary - drains keyboard because interrupt has given up.
kbd_intr();
// Schedule and run the first user environment!
sched_yield();
}
int main(void){
cli();
cons_init();
printk("Welcome to NONE.\nVersion : "KERNEL_VERSION"\n");
mem_init();
trap_init();
god_init();
}
/*
* null console initialization. This includes allocation of a new device and
* a new tty.
*/
void
nullcninit(struct consdev *cn)
{
static struct consdev nullcn = cons_init(null);
nullcnprobe(&nullcn);
cn_tab = &nullcn;
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
//bluesea
//经测试，下面的语句会输出:edata f0114300, end f0114970
//因此，edata < end, [edata, end)之间是bss段, kernel需要用的global variable.
// > end之后的内存可以用于boot_alloc
//cprintf("edata %x, end %x\n", edata, end);
cprintf("6828 decimal is %o octal!\n", 6828);
// Lab 2 memory management initialization functions
mem_init();
// Lab 3 user environment initialization functions
env_init();
trap_init();
// Lab 4 multiprocessor initialization functions
mp_init();
lapic_init();
// Lab 4 multitasking initialization functions
pic_init();
// Acquire the big kernel lock before waking up APs
// Your code here:
lock_kernel();
// Starting non-boot CPUs
boot_aps();
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE(TEST, ENV_TYPE_USER);
#else
// Touch all you want.
//ENV_CREATE(user_primes, ENV_TYPE_USER);
//ENV_CREATE(user_yield, ENV_TYPE_USER);
//ENV_CREATE(user_yield, ENV_TYPE_USER);
//ENV_CREATE(user_yield, ENV_TYPE_USER);
ENV_CREATE(user_dumbfork, ENV_TYPE_USER);
#endif // TEST*
// Schedule and run the first user environment!
sched_yield();
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("372 decimal is %o octal!\n", 372);
// Lab 2 memory management initialization functions
mem_init();
// Lab 3 user environment initialization functions
env_init();
trap_init();
// Lab 4 multiprocessor initialization functions
mp_init();
lapic_init();
// Lab 4 multitasking initialization functions
pic_init();
// Acquire the big kernel lock before waking up APs
// Your code here:
lock_kernel();
// Starting non-boot CPUs
boot_aps();
// Should always have idle processes at first.
int i;
for (i = 0; i < NCPU; i++)
ENV_CREATE(user_idle, ENV_TYPE_IDLE);
// ENV_CREATE(user_yield, ENV_TYPE_USER);
// ENV_CREATE(user_yield, ENV_TYPE_USER);
// ENV_CREATE(user_yield, ENV_TYPE_USER);
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE(TEST, ENV_TYPE_USER);
#else
// Touch all you want.
ENV_CREATE(user_primes, ENV_TYPE_USER);
#endif // TEST*
// Schedule and run the first user environment!
sched_yield();
}
static void
fakecninit(void)
{
static struct consdev fakecntab = cons_init(sacom);
cn_tab = &fakecntab;
(*cn_tab->cn_init)(0);
cn_tab->cn_pri = CN_REMOTE;
}
static void handle_keypress(char c)
{
/* brho: not sure if this will work on riscv or not... */
#define capchar2ctl(x) ((x) - '@')
amr_t handler = c == capchar2ctl('G') ? __run_mon : __cons_add_char;
send_kernel_message(core_id(), handler, (long)&cons_buf, (long)c, 0,
KMSG_ROUTINE);
cons_init();
}
/*
* driver's main function.
*/
int XXXmain(void)
{
if (cons_init())
return (-1);
print_string("[teton] initialised\n");
return 0;
}
// The kernel main function. Initialize everything and start the kernel
// debugger. The two arguments are the physical address of the Multiboot info
// structure and the bootloader magic number respectively.
void
init()
{
int r;
// Initialize the console first to print messages during the initialization
cons_init();
kprintf("Argentum Operating System\n");
arch_init();
kmem_cache_init();
kmem_cache_sizes_init();
vm_init();
process_init();
thread_init();
ipc_init();
scheduler_init();
sync_init();
clock_init();
if ((r = process_create_system(system_main, NULL)) < 0)
kprintf("Cannot create system process: %s\n", strerror(-r));
if (module_start) {
Boot_image *image = (Boot_image *) module_start;
if(image->magic != 0x12345678)
panic("invalid bootimage");
for (unsigned i = 0; i < image->length; i++) {
uint8_t *binary = (uint8_t *) image + image->headers[i].offset;
size_t size = image->headers[i].length;
if (binary < module_start || binary >= module_end)
panic("invalid bootimage");
if ((binary + size) <= module_start || (binary + size) > module_end)
panic("invalid bootimage");
r = process_create((uint8_t *) image + image->headers[i].offset,
image->headers[i].length, PROCESS_TYPE_USER, NULL);
if (r < 0)
panic("Cannot create process: %s", strerror(-r));
}
}
scheduler_start();
for (;;) {
kdb_main(NULL);
}
}
void uart_init(uint8_t uart, uint8_t interrupts)
{
uint8_t irq = uart2irq[uart];
uart_reg_write(uart, IER, 0x00);
if (uart == cons_get_uart()) {
cons_init();
if(interrupts) {
irq_register_handler(irq, &uart_irq_handler_cons);
irq_config(irq, 0, 0, 0xff);
irq_enable(irq);
}
} else if (uart == sercomm_get_uart()) {
sercomm_init();
if(interrupts) {
irq_register_handler(irq, &uart_irq_handler_sercomm);
irq_config(irq, 0, 0, 0xff);
irq_enable(irq);
}
uart_irq_enable(uart, UART_IRQ_RX_CHAR, 1);
} else {
return;
}
#if 0
if (uart == 1) {
/* assign UART to MCU and unmask interrupts*/
writeb(UART_REG_UIR, 0x00);
}
#endif
/* if we don't initialize these, we get strange corruptions in the
received data... :-( */
uart_reg_write(uart, MDR1, 0x07); /* turn off UART */
uart_reg_write(uart, XON1, 0x00); /* Xon1/Addr Register */
uart_reg_write(uart, XON2, 0x00); /* Xon2/Addr Register */
uart_reg_write(uart, XOFF1, 0x00); /* Xoff1 Register */
uart_reg_write(uart, XOFF2, 0x00); /* Xoff2 Register */
uart_reg_write(uart, EFR, 0x00); /* Enhanced Features Register */
/* select UART mode */
uart_reg_write(uart, MDR1, 0);
/* no XON/XOFF flow control, ENHANCED_EN, no auto-RTS/CTS */
uart_reg_write(uart, EFR, (1 << 4));
/* enable Tx/Rx FIFO, Tx trigger at 56 spaces, Rx trigger at 60 chars */
uart_reg_write(uart, FCR, FIFO_EN | RX_FIFO_CLEAR | TX_FIFO_CLEAR |
(3 << TX_FIFO_TRIG_SHIFT) | (3 << RX_FIFO_TRIG_SHIFT));
/* THR interrupt only when TX FIFO and TX shift register are empty */
uart_reg_write(uart, SCR, (1 << 0));// | (1 << 3));
/* 8 bit, 1 stop bit, no parity, no break */
uart_reg_write(uart, LCR, 0x03);
uart_set_lcr7bit(uart, 0);
}
void
x86_boot(struct multiboot_info *mbi)
{
cons_init();
bmk_printf("rump kernel bare metal bootstrap\n\n");
cpu_init();
bmk_sched_init();
multiboot(mbi);
spl0();
bmk_sched_startmain(bmk_mainthread, multiboot_cmdline);
}
void __noreturn
kern_init(void) {
//setup_exception_vector();
tlb_invalidate_all();
/*
unsigned base = 0xBE000000;
int i, j;
for (j = 10; j < 24; ++j) {
kprintf("\nj=%d\n\n\n", j);
for (i = 0; i < 10; ++i) {
int *addr = (int*)(base + i * 4 + (1 << j));
kprintf("0x%08x=0x%04x\n", addr, (*addr)&0xFFFF);
}
}
*/
pic_init(); // init interrupt controller
cons_init(); // init the console
clock_init(); // init clock interrupt
// panic("init");
check_initrd();
const char *message = "(THU.CST) os is loading ...\n\n";
kprintf(message);
print_kerninfo();
#if 0
kprintf("EX\n");
__asm__ volatile("syscall");
kprintf("EX RET\n");
#endif
pmm_init(); // init physical memory management
vmm_init(); // init virtual memory management
sched_init();
proc_init(); // init process table
ide_init();
fs_init();
intr_enable(); // enable irq interrupt
//*(int*)(0x00124) = 0x432;
//asm volatile("divu $1, $1, $1");
cpu_idle();
}
