/*
* the idle loop on a Sparc... ;)
*/
void cpu_idle(void)
{
/* endless idle loop with no priority at all */
for (;;) {
if (ARCH_SUN4C) {
static int count = HZ;
static unsigned long last_jiffies;
static unsigned long last_faults;
static unsigned long fps;
unsigned long now;
unsigned long faults;
extern unsigned long sun4c_kernel_faults;
extern void sun4c_grow_kernel_ring(void);
local_irq_disable();
now = jiffies;
count -= (now - last_jiffies);
last_jiffies = now;
if (count < 0) {
count += HZ;
faults = sun4c_kernel_faults;
fps = (fps + (faults - last_faults)) >> 1;
last_faults = faults;
#if 0
printk("kernel faults / second = %ld\n", fps);
#endif
if (fps >= SUN4C_FAULT_HIGH) {
sun4c_grow_kernel_ring();
}
}
local_irq_enable();
}
if (pm_idle) {
while (!need_resched())
(*pm_idle)();
} else {
while (!need_resched())
cpu_relax();
}
preempt_enable_no_resched();
schedule();
preempt_disable();
check_pgt_cache();
}
/*
* the idle loop on a Sparc... ;)
*/
int cpu_idle(void)
{
int ret = -EPERM;
if (current->pid != 0)
goto out;
/* endless idle loop with no priority at all */
current->nice = 20;
current->counter = -100;
init_idle();
for (;;) {
if (ARCH_SUN4C_SUN4) {
static int count = HZ;
static unsigned long last_jiffies = 0;
static unsigned long last_faults = 0;
static unsigned long fps = 0;
unsigned long now;
unsigned long faults;
unsigned long flags;
extern unsigned long sun4c_kernel_faults;
extern void sun4c_grow_kernel_ring(void);
save_and_cli(flags);
now = jiffies;
count -= (now - last_jiffies);
last_jiffies = now;
if (count < 0) {
count += HZ;
faults = sun4c_kernel_faults;
fps = (fps + (faults - last_faults)) >> 1;
last_faults = faults;
#if 0
printk("kernel faults / second = %d\n", fps);
#endif
if (fps >= SUN4C_FAULT_HIGH) {
sun4c_grow_kernel_ring();
}
}
restore_flags(flags);
}
check_pgt_cache();
schedule();
}