static void cbe_idle(void)
{
unsigned long ctrl;
/* Why do we do that on every idle ? Couldn't that be done once for
* all or do we lose the state some way ? Also, the pm_control
* register setting, that can't be set once at boot ? We really want
* to move that away in order to implement a simple powersave
*/
cbe_enable_pause_zero();
while (1) {
if (!need_resched()) {
local_irq_disable();
while (!need_resched()) {
/* go into low thread priority */
HMT_low();
/*
* atomically disable thread execution
* and runlatch.
* External and Decrementer exceptions
* are still handled when the thread
* is disabled but now enter in
* cbe_system_reset_exception()
*/
ctrl = mfspr(SPRN_CTRLF);
ctrl &= ~(CTRL_RUNLATCH | CTRL_TE);
mtspr(SPRN_CTRLT, ctrl);
}
/* restore thread prio */
HMT_medium();
local_irq_enable();
}
/*
* turn runlatch on again before scheduling the
* process we just woke up
*/
ppc64_runlatch_on();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
static void cbe_idle(void)
{
unsigned long ctrl;
cbe_enable_pause_zero();
while (1) {
if (!need_resched()) {
local_irq_disable();
while (!need_resched()) {
/* go into low thread priority */
HMT_low();
/*
* atomically disable thread execution
* and runlatch.
* External and Decrementer exceptions
* are still handled when the thread
* is disabled but now enter in
* cbe_system_reset_exception()
*/
ctrl = mfspr(SPRN_CTRLF);
ctrl &= ~(CTRL_RUNLATCH | CTRL_TE);
mtspr(SPRN_CTRLT, ctrl);
}
/* restore thread prio */
HMT_medium();
local_irq_enable();
}
/*
* turn runlatch on again before scheduling the
* process we just woke up
*/
ppc64_runlatch_on();
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
