1/*
 2 * The idle loop for all SuperH platforms.
 3 *
 4 *  Copyright (C) 2002 - 2009  Paul Mundt
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
 
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/mm.h>
13#include <linux/pm.h>
14#include <linux/tick.h>
15#include <linux/preempt.h>
16#include <linux/thread_info.h>
17#include <linux/irqflags.h>
18#include <linux/smp.h>
19#include <linux/atomic.h>
20#include <asm/pgalloc.h>
21#include <asm/smp.h>
22#include <asm/bl_bit.h>
23
24static void (*sh_idle)(void);
25
26void default_idle(void)
27{
28	set_bl_bit();
29	local_irq_enable();
30	/* Isn't this racy ? */
31	cpu_sleep();
 
32	clear_bl_bit();
33}
34
35void arch_cpu_idle_dead(void)
36{
37	play_dead();
38}
39
40void arch_cpu_idle(void)
41{
42	sh_idle();
43}
44
45void __init select_idle_routine(void)
46{
47	/*
48	 * If a platform has set its own idle routine, leave it alone.
49	 */
50	if (!sh_idle)
51		sh_idle = default_idle;
52}
53
54void stop_this_cpu(void *unused)
55{
56	local_irq_disable();
57	set_cpu_online(smp_processor_id(), false);
58
59	for (;;)
60		cpu_sleep();
61}

 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}