static int iSeries_idle(void)
{
struct paca_struct *lpaca;
long oldval;
unsigned long CTRL;
/* ensure iSeries run light will be out when idle */
clear_thread_flag(TIF_RUN_LIGHT);
CTRL = mfspr(CTRLF);
CTRL &= ~RUNLATCH;
mtspr(CTRLT, CTRL);
lpaca = get_paca();
while (1) {
if (lpaca->lppaca.xSharedProc) {
if (ItLpQueue_isLpIntPending(lpaca->lpqueue_ptr))
process_iSeries_events();
if (!need_resched())
yield_shared_processor();
} else {
oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
if (!oldval) {
set_thread_flag(TIF_POLLING_NRFLAG);
while (!need_resched()) {
HMT_medium();
if (ItLpQueue_isLpIntPending(lpaca->lpqueue_ptr))
process_iSeries_events();
HMT_low();
}
HMT_medium();
clear_thread_flag(TIF_POLLING_NRFLAG);
} else {
set_need_resched();
}
}
schedule();
}
return 0;
}
/*
* timer_interrupt - gets called when the decrementer overflows,
* with interrupts disabled.
*/
int timer_interrupt(struct pt_regs * regs)
{
int next_dec;
unsigned long cur_tb;
struct paca_struct *lpaca = get_paca();
unsigned long cpu = lpaca->xPacaIndex;
irq_enter();
#ifndef CONFIG_PPC_ISERIES
ppc64_do_profile(regs);
#endif
lpaca->xLpPaca.xIntDword.xFields.xDecrInt = 0;
while (lpaca->next_jiffy_update_tb <= (cur_tb = get_tb())) {
#ifdef CONFIG_SMP
smp_local_timer_interrupt(regs);
#endif
if (cpu == boot_cpuid) {
write_seqlock(&xtime_lock);
tb_last_stamp = lpaca->next_jiffy_update_tb;
do_timer(regs);
timer_sync_xtime( cur_tb );
timer_check_rtc();
write_sequnlock(&xtime_lock);
if ( adjusting_time && (time_adjust == 0) )
ppc_adjtimex();
}
lpaca->next_jiffy_update_tb += tb_ticks_per_jiffy;
}
next_dec = lpaca->next_jiffy_update_tb - cur_tb;
if (next_dec > lpaca->default_decr)
next_dec = lpaca->default_decr;
set_dec(next_dec);
#ifdef CONFIG_PPC_ISERIES
{
struct ItLpQueue *lpq = lpaca->lpQueuePtr;
if (lpq && ItLpQueue_isLpIntPending(lpq))
lpEvent_count += ItLpQueue_process(lpq, regs);
}
#endif
irq_exit();
return 1;
}
