Exemple #1
0
void sc8825_idle(void)
{
	int this_cpu = smp_processor_id();
	int val;
	if (!need_resched()) {
		hw_local_irq_disable();
		if (!arch_local_irq_pending()) {
			val = os_ctx->idle(os_ctx);
			if (0 == val) {
#ifdef CONFIG_CACHE_L2X0
				/*l2cache power control, standby mode enable*/
				/*L2X0_POWER_CTRL
				__raw_writel(1, SPRD_L2_BASE+0xF80);
				l2x0_suspend();
				*/
#endif
#if defined(CONFIG_LOCAL_TIMERS)
				clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &this_cpu);
#endif
				cpu_do_idle();
#if defined(CONFIG_LOCAL_TIMERS)
				clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &this_cpu);
#endif

#ifdef CONFIG_CACHE_L2X0
				/*
				l2x0_resume(1);
				*/
#endif
			}
		}
		hw_local_irq_enable();
	}
	local_irq_enable();
	return;
}
Exemple #2
0
static int sprd_pm_deepsleep(suspend_state_t state)
{
    int ret_val = 0;
    unsigned long flags;
    u32 battery_time, cur_time;
    battery_time = cur_time = get_sys_cnt();
    unsigned int cpu = smp_processor_id();

    /* add for debug & statisic*/
    clr_sleep_mode();
    time_statisic_begin();

#if defined(CONFIG_NKERNEL) && !defined(CONFIG_NKERNEL_PM_MASTER)
    hw_local_irq_disable();
    os_ctx->suspend_to_memory(os_ctx);
    hw_local_irq_enable();
#else
    /*
    * when we get here, only boot cpu still alive
    */
    if (smp_processor_id()) {
        __WARN();
        goto enter_exit;
    }

    while(1) {
        hw_local_irq_disable();
        local_fiq_disable();
        local_irq_save(flags);

        if (arch_local_irq_pending()) {
            /* add for debug & statisic*/
            irq_wakeup_set();

            local_irq_restore(flags);
            hw_local_irq_enable();
            local_fiq_enable();
            break;
        } else {
            local_irq_restore(flags);
            WARN_ONCE(!irqs_disabled(), "#####: Interrupts enabled in pm_enter()!\n");
#if defined(CONFIG_NKERNEL)
            /*
            * return value 0 means that other guest OS  are all idle
            */
            ret_val = os_ctx->idle(os_ctx);
            if (0 == ret_val) {
#ifdef CONFIG_NKERNEL_PM_MASTER
                os_ctx->smp_cpu_stop(0);
#endif
                sprd_cpu_deep_sleep(cpu);
#ifdef CONFIG_NKERNEL_PM_MASTER
                os_ctx->smp_cpu_start(0, 0);/* the 2nd parameter is meaningless*/
#endif
            } else {
                printk("******** os_ctx->idle return %d ********\n", ret_val);
            }
#else
            sprd_cpu_deep_sleep(cpu);
#endif
            hw_local_irq_enable();
            local_fiq_enable();
        }

        battery_sleep();
        cur_time = get_sys_cnt();
        if ((cur_time -  battery_time) > BATTERY_CHECK_INTERVAL) {
            battery_time = cur_time;
            if (sprd_check_battery()) {
                printk("###: battery low!\n");
                break;
            }
        }
    }/*end while*/

    time_statisic_end();
#endif

enter_exit:
    return ret_val;
}