diff options
Diffstat (limited to 'arch/ppc/kernel/idle.c')
-rw-r--r-- | arch/ppc/kernel/idle.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/arch/ppc/kernel/idle.c b/arch/ppc/kernel/idle.c deleted file mode 100644 index 1be3ca5bae40..000000000000 --- a/arch/ppc/kernel/idle.c +++ /dev/null | |||
@@ -1,112 +0,0 @@ | |||
1 | /* | ||
2 | * Idle daemon for PowerPC. Idle daemon will handle any action | ||
3 | * that needs to be taken when the system becomes idle. | ||
4 | * | ||
5 | * Written by Cort Dougan (cort@cs.nmt.edu). Subsequently hacked | ||
6 | * on by Tom Rini, Armin Kuster, Paul Mackerras and others. | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU General Public License | ||
10 | * as published by the Free Software Foundation; either version | ||
11 | * 2 of the License, or (at your option) any later version. | ||
12 | */ | ||
13 | #include <linux/config.h> | ||
14 | #include <linux/errno.h> | ||
15 | #include <linux/sched.h> | ||
16 | #include <linux/kernel.h> | ||
17 | #include <linux/mm.h> | ||
18 | #include <linux/smp.h> | ||
19 | #include <linux/smp_lock.h> | ||
20 | #include <linux/stddef.h> | ||
21 | #include <linux/unistd.h> | ||
22 | #include <linux/ptrace.h> | ||
23 | #include <linux/slab.h> | ||
24 | #include <linux/sysctl.h> | ||
25 | #include <linux/cpu.h> | ||
26 | |||
27 | #include <asm/pgtable.h> | ||
28 | #include <asm/uaccess.h> | ||
29 | #include <asm/system.h> | ||
30 | #include <asm/io.h> | ||
31 | #include <asm/mmu.h> | ||
32 | #include <asm/cache.h> | ||
33 | #include <asm/cputable.h> | ||
34 | #include <asm/machdep.h> | ||
35 | #include <asm/smp.h> | ||
36 | |||
37 | void default_idle(void) | ||
38 | { | ||
39 | void (*powersave)(void); | ||
40 | |||
41 | powersave = ppc_md.power_save; | ||
42 | |||
43 | if (!need_resched()) { | ||
44 | if (powersave != NULL) | ||
45 | powersave(); | ||
46 | #ifdef CONFIG_SMP | ||
47 | else { | ||
48 | set_thread_flag(TIF_POLLING_NRFLAG); | ||
49 | while (!need_resched() && | ||
50 | !cpu_is_offline(smp_processor_id())) | ||
51 | barrier(); | ||
52 | clear_thread_flag(TIF_POLLING_NRFLAG); | ||
53 | } | ||
54 | #endif | ||
55 | } | ||
56 | } | ||
57 | |||
58 | /* | ||
59 | * The body of the idle task. | ||
60 | */ | ||
61 | void cpu_idle(void) | ||
62 | { | ||
63 | int cpu = smp_processor_id(); | ||
64 | |||
65 | for (;;) { | ||
66 | while (!need_resched()) { | ||
67 | if (ppc_md.idle != NULL) | ||
68 | ppc_md.idle(); | ||
69 | else | ||
70 | default_idle(); | ||
71 | } | ||
72 | |||
73 | if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING) | ||
74 | cpu_die(); | ||
75 | preempt_enable_no_resched(); | ||
76 | schedule(); | ||
77 | preempt_disable(); | ||
78 | } | ||
79 | } | ||
80 | |||
81 | #if defined(CONFIG_SYSCTL) && defined(CONFIG_6xx) | ||
82 | /* | ||
83 | * Register the sysctl to set/clear powersave_nap. | ||
84 | */ | ||
85 | extern int powersave_nap; | ||
86 | |||
87 | static ctl_table powersave_nap_ctl_table[]={ | ||
88 | { | ||
89 | .ctl_name = KERN_PPC_POWERSAVE_NAP, | ||
90 | .procname = "powersave-nap", | ||
91 | .data = &powersave_nap, | ||
92 | .maxlen = sizeof(int), | ||
93 | .mode = 0644, | ||
94 | .proc_handler = &proc_dointvec, | ||
95 | }, | ||
96 | { 0, }, | ||
97 | }; | ||
98 | static ctl_table powersave_nap_sysctl_root[] = { | ||
99 | { 1, "kernel", NULL, 0, 0755, powersave_nap_ctl_table, }, | ||
100 | { 0,}, | ||
101 | }; | ||
102 | |||
103 | static int __init | ||
104 | register_powersave_nap_sysctl(void) | ||
105 | { | ||
106 | register_sysctl_table(powersave_nap_sysctl_root, 0); | ||
107 | |||
108 | return 0; | ||
109 | } | ||
110 | |||
111 | __initcall(register_powersave_nap_sysctl); | ||
112 | #endif | ||