1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * The idle loop for all SuperH platforms.
 4 *
 5 *  Copyright (C) 2002 - 2009  Paul Mundt
 6 */
 
 7#include <linux/module.h>
 8#include <linux/init.h>
 9#include <linux/mm.h>
10#include <linux/pm.h>
11#include <linux/tick.h>
12#include <linux/preempt.h>
13#include <linux/thread_info.h>
14#include <linux/irqflags.h>
15#include <linux/smp.h>
16#include <linux/atomic.h>
17#include <asm/pgalloc.h>
18#include <asm/smp.h>
19#include <asm/bl_bit.h>
20
21static void (*sh_idle)(void);
22
23void default_idle(void)
24{
25	set_bl_bit();
26	local_irq_enable();
27	/* Isn't this racy ? */
28	cpu_sleep();
 
29	clear_bl_bit();
30}
31
32void arch_cpu_idle_dead(void)
33{
34	play_dead();
35}
36
37void arch_cpu_idle(void)
38{
39	sh_idle();
40}
41
42void __init select_idle_routine(void)
43{
44	/*
45	 * If a platform has set its own idle routine, leave it alone.
46	 */
47	if (!sh_idle)
48		sh_idle = default_idle;
49}
50
51void stop_this_cpu(void *unused)
52{
53	local_irq_disable();
54	set_cpu_online(smp_processor_id(), false);
55
56	for (;;)
57		cpu_sleep();
58}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * The idle loop for all SuperH platforms.
 4 *
 5 *  Copyright (C) 2002 - 2009  Paul Mundt
 6 */
 7#include <linux/cpu.h>
 8#include <linux/module.h>
 9#include <linux/init.h>
10#include <linux/mm.h>
11#include <linux/pm.h>
12#include <linux/tick.h>
13#include <linux/preempt.h>
14#include <linux/thread_info.h>
15#include <linux/irqflags.h>
16#include <linux/smp.h>
17#include <linux/atomic.h>
18#include <asm/processor.h>
19#include <asm/smp.h>
20#include <asm/bl_bit.h>
21
22static void (*sh_idle)(void);
23
24void default_idle(void)
25{
26	set_bl_bit();
27	raw_local_irq_enable();
28	/* Isn't this racy ? */
29	cpu_sleep();
30	raw_local_irq_disable();
31	clear_bl_bit();
32}
33
34void __noreturn arch_cpu_idle_dead(void)
35{
36	play_dead();
37}
38
39void arch_cpu_idle(void)
40{
41	sh_idle();
42}
43
44void __init select_idle_routine(void)
45{
46	/*
47	 * If a platform has set its own idle routine, leave it alone.
48	 */
49	if (!sh_idle)
50		sh_idle = default_idle;
51}
52
53void stop_this_cpu(void *unused)
54{
55	local_irq_disable();
56	set_cpu_online(smp_processor_id(), false);
57
58	for (;;)
59		cpu_sleep();
60}