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| 2 | |
| 3 | * The idle loop for all SuperH platforms.
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| 4 | *
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| 5 | * Copyright (C) 2002 - 2009 Paul Mundt
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| 6 |
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| 7 | #include <linux/cpu.h>
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| 8 | #include <linux/module.h>
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| 9 | #include <linux/init.h>
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| 10 | #include <linux/mm.h>
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| 11 | #include <linux/pm.h>
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| 12 | #include <linux/tick.h>
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| 13 | #include <linux/preempt.h>
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| 14 | #include <linux/thread_info.h>
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| 15 | #include <linux/irqflags.h>
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| 16 | #include <linux/smp.h>
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| 17 | #include <linux/atomic.h>
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| 18 | #include <asm/processor.h>
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| 19 | #include <asm/smp.h>
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| 20 | #include <asm/bl_bit.h>
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| 21 |
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| 22 | static void (*sh_idle)(void);
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| 23 |
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| 24 | void default_idle(void)
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| 25 | {
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| 26 | set_bl_bit();
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| 27 | raw_local_irq_enable();
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| 28 |
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| 29 | cpu_sleep();
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| 30 | raw_local_irq_disable();
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| 31 | clear_bl_bit();
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| 32 | }
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| 33 |
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| 34 | void __noreturn arch_cpu_idle_dead(void)
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| 35 | {
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| 36 | play_dead();
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| 37 | }
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| 38 |
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| 39 | void arch_cpu_idle(void)
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| 40 | {
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| 41 | sh_idle();
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| 42 | }
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| 43 |
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| 44 | void __init select_idle_routine(void)
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| 45 | {
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| 46 | |
| 47 | * If a platform has set its own idle routine, leave it alone.
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| 48 |
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| 49 | if (!sh_idle)
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| 50 | sh_idle = default_idle;
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| 51 | }
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| 52 |
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| 53 | void stop_this_cpu(void *unused)
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| 54 | {
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| 55 | local_irq_disable();
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| 56 | set_cpu_online(smp_processor_id(), false);
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| 57 |
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| 58 | for (;;)
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| 59 | cpu_sleep();
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| 60 | }
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