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clk: samsung: Fix double add of syscore ops after driver rebind
[deliverable/linux.git] / include / linux / cpu.h
CommitLineData
1da177e4
LT		 1/*
2 * include/linux/cpu.h - generic cpu definition
3 *
4 * This is mainly for topological representation. We define the
5 * basic 'struct cpu' here, which can be embedded in per-arch
6 * definitions of processors.
7 *
8 * Basic handling of the devices is done in drivers/base/cpu.c
1da177e4 9 *
611a75e1 10 * CPUs are exported via sysfs in the devices/system/cpu
1da177e4 11 * directory.
1da177e4
LT		 12 */
13#ifndef _LINUX_CPU_H_
14#define _LINUX_CPU_H_
15
1da177e4
LT		 16#include <linux/node.h>
17#include <linux/compiler.h>
18#include <linux/cpumask.h>
1da177e4 19
313162d0 20struct device;
d1cb9d1a 21struct device_node;
313162d0 22
1da177e4
LT		 23struct cpu {
24 int node_id; /* The node which contains the CPU */
72486f1f 25 int hotpluggable; /* creates sysfs control file if hotpluggable */
8a25a2fd 26 struct device dev;
1da177e4
LT		 27};
28
76b67ed9 29extern int register_cpu(struct cpu *cpu, int num);
8a25a2fd 30extern struct device *get_cpu_device(unsigned cpu);
2987557f 31extern bool cpu_is_hotpluggable(unsigned cpu);
183912d3 32extern bool arch_match_cpu_phys_id(int cpu, u64 phys_id);
d1cb9d1a
DM		 33extern bool arch_find_n_match_cpu_physical_id(struct device_node *cpun,
34 int cpu, unsigned int *thread);
0344c6c5 35
8a25a2fd
KS		 36extern int cpu_add_dev_attr(struct device_attribute *attr);
37extern void cpu_remove_dev_attr(struct device_attribute *attr);
0344c6c5 38
8a25a2fd
KS		 39extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
40extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
0344c6c5 41
1da177e4 42#ifdef CONFIG_HOTPLUG_CPU
76b67ed9 43extern void unregister_cpu(struct cpu *cpu);
12633e80
NF		 44extern ssize_t arch_cpu_probe(const char *, size_t);
45extern ssize_t arch_cpu_release(const char *, size_t);
1da177e4
LT		 46#endif
47struct notifier_block;
48
50a323b7
TH		 49/*
50 * CPU notifier priorities.
51 */
52enum {
3a101d05
TH		 53 /*
54 * SCHED_ACTIVE marks a cpu which is coming up active during
55 * CPU_ONLINE and CPU_DOWN_FAILED and must be the first
56 * notifier. CPUSET_ACTIVE adjusts cpuset according to
57 * cpu_active mask right after SCHED_ACTIVE. During
58 * CPU_DOWN_PREPARE, SCHED_INACTIVE and CPUSET_INACTIVE are
59 * ordered in the similar way.
60 *
61 * This ordering guarantees consistent cpu_active mask and
62 * migration behavior to all cpu notifiers.
63 */
64 CPU_PRI_SCHED_ACTIVE = INT_MAX,
65 CPU_PRI_CPUSET_ACTIVE = INT_MAX - 1,
66 CPU_PRI_SCHED_INACTIVE = INT_MIN + 1,
67 CPU_PRI_CPUSET_INACTIVE = INT_MIN,
68
50a323b7
TH		 69 /* migration should happen before other stuff but after perf */
70 CPU_PRI_PERF = 20,
71 CPU_PRI_MIGRATION = 10,
65758202
TH		 72 /* bring up workqueues before normal notifiers and down after */
73 CPU_PRI_WORKQUEUE_UP = 5,
74 CPU_PRI_WORKQUEUE_DOWN = -5,
50a323b7
TH		 75};
76
80f1ff97
AW		 77#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */
78#define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */
79#define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */
80#define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */
81#define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */
82#define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */
83#define CPU_DYING 0x0008 /* CPU (unsigned)v not running any task,
84 * not handling interrupts, soon dead.
85 * Called on the dying cpu, interrupts
86 * are already disabled. Must not
87 * sleep, must not fail */
88#define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug
89 * lock is dropped */
90#define CPU_STARTING 0x000A /* CPU (unsigned)v soon running.
91 * Called on the new cpu, just before
92 * enabling interrupts. Must not sleep,
93 * must not fail */
94
95/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
96 * operation in progress
97 */
98#define CPU_TASKS_FROZEN 0x0010
99
100#define CPU_ONLINE_FROZEN (CPU_ONLINE | CPU_TASKS_FROZEN)
101#define CPU_UP_PREPARE_FROZEN (CPU_UP_PREPARE | CPU_TASKS_FROZEN)
102#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED | CPU_TASKS_FROZEN)
103#define CPU_DOWN_PREPARE_FROZEN (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
104#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
105#define CPU_DEAD_FROZEN (CPU_DEAD | CPU_TASKS_FROZEN)
106#define CPU_DYING_FROZEN (CPU_DYING | CPU_TASKS_FROZEN)
107#define CPU_STARTING_FROZEN (CPU_STARTING | CPU_TASKS_FROZEN)
108
109
1da177e4
LT		 110#ifdef CONFIG_SMP
111/* Need to know about CPUs going up/down? */
799e64f0
PM		 112#if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE)
113#define cpu_notifier(fn, pri) { \
0db0628d 114 static struct notifier_block fn##_nb = \
799e64f0
PM		 115 { .notifier_call = fn, .priority = pri }; \
116 register_cpu_notifier(&fn##_nb); \
117}
93ae4f97
SB		 118
119#define __cpu_notifier(fn, pri) { \
120 static struct notifier_block fn##_nb = \
121 { .notifier_call = fn, .priority = pri }; \
122 __register_cpu_notifier(&fn##_nb); \
123}
799e64f0
PM		 124#else /* #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */
125#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97 126#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
799e64f0 127#endif /* #else #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */
93ae4f97 128
65edc68c 129#ifdef CONFIG_HOTPLUG_CPU
47e627bc 130extern int register_cpu_notifier(struct notifier_block *nb);
93ae4f97 131extern int __register_cpu_notifier(struct notifier_block *nb);
1da177e4 132extern void unregister_cpu_notifier(struct notifier_block *nb);
93ae4f97 133extern void __unregister_cpu_notifier(struct notifier_block *nb);
65edc68c 134#else
47e627bc
AK		 135
136#ifndef MODULE
137extern int register_cpu_notifier(struct notifier_block *nb);
93ae4f97 138extern int __register_cpu_notifier(struct notifier_block *nb);
47e627bc
AK		 139#else
140static inline int register_cpu_notifier(struct notifier_block *nb)
141{
142 return 0;
143}
93ae4f97
SB		 144
145static inline int __register_cpu_notifier(struct notifier_block *nb)
146{
147 return 0;
148}
47e627bc
AK		 149#endif
150
65edc68c
CS		 151static inline void unregister_cpu_notifier(struct notifier_block *nb)
152{
153}
93ae4f97
SB		 154
155static inline void __unregister_cpu_notifier(struct notifier_block *nb)
156{
157}
65edc68c 158#endif
1da177e4
LT		 159
160int cpu_up(unsigned int cpu);
e545a614 161void notify_cpu_starting(unsigned int cpu);
3da1c84c
ON		 162extern void cpu_maps_update_begin(void);
163extern void cpu_maps_update_done(void);
d0d23b54 164
93ae4f97
SB		 165#define cpu_notifier_register_begin cpu_maps_update_begin
166#define cpu_notifier_register_done cpu_maps_update_done
167
3da1c84c 168#else /* CONFIG_SMP */
1da177e4 169
799e64f0 170#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97 171#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
799e64f0 172
1da177e4
LT		 173static inline int register_cpu_notifier(struct notifier_block *nb)
174{
175 return 0;
176}
d0d23b54 177
93ae4f97
SB		 178static inline int __register_cpu_notifier(struct notifier_block *nb)
179{
180 return 0;
181}
182
1da177e4
LT		 183static inline void unregister_cpu_notifier(struct notifier_block *nb)
184{
185}
186
93ae4f97
SB		 187static inline void __unregister_cpu_notifier(struct notifier_block *nb)
188{
189}
190
3da1c84c
ON		 191static inline void cpu_maps_update_begin(void)
192{
193}
194
195static inline void cpu_maps_update_done(void)
196{
197}
198
93ae4f97
SB		 199static inline void cpu_notifier_register_begin(void)
200{
201}
202
203static inline void cpu_notifier_register_done(void)
204{
205}
206
1da177e4 207#endif /* CONFIG_SMP */
8a25a2fd 208extern struct bus_type cpu_subsys;
1da177e4
LT		 209
210#ifdef CONFIG_HOTPLUG_CPU
211/* Stop CPUs going up and down. */
f7dff2b1 212
b9d10be7
TK		 213extern void cpu_hotplug_begin(void);
214extern void cpu_hotplug_done(void);
86ef5c9a 215extern void get_online_cpus(void);
dd56af42 216extern bool try_get_online_cpus(void);
86ef5c9a 217extern void put_online_cpus(void);
16e53dbf
SB		 218extern void cpu_hotplug_disable(void);
219extern void cpu_hotplug_enable(void);
799e64f0 220#define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri)
93ae4f97 221#define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri)
39f4885c 222#define register_hotcpu_notifier(nb) register_cpu_notifier(nb)
93ae4f97 223#define __register_hotcpu_notifier(nb) __register_cpu_notifier(nb)
39f4885c 224#define unregister_hotcpu_notifier(nb) unregister_cpu_notifier(nb)
93ae4f97 225#define __unregister_hotcpu_notifier(nb) __unregister_cpu_notifier(nb)
cb79295e 226void clear_tasks_mm_cpumask(int cpu);
1da177e4 227int cpu_down(unsigned int cpu);
f7dff2b1
GS		 228
229#else /* CONFIG_HOTPLUG_CPU */
230
b9d10be7
TK		 231static inline void cpu_hotplug_begin(void) {}
232static inline void cpu_hotplug_done(void) {}
86ef5c9a 233#define get_online_cpus() do { } while (0)
dd56af42 234#define try_get_online_cpus() true
86ef5c9a 235#define put_online_cpus() do { } while (0)
16e53dbf
SB		 236#define cpu_hotplug_disable() do { } while (0)
237#define cpu_hotplug_enable() do { } while (0)
02316067 238#define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
93ae4f97 239#define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
761bb431
SS		 240/* These aren't inline functions due to a GCC bug. */
241#define register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
93ae4f97 242#define __register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
761bb431 243#define unregister_hotcpu_notifier(nb) ({ (void)(nb); })
93ae4f97 244#define __unregister_hotcpu_notifier(nb) ({ (void)(nb); })
f7dff2b1 245#endif /* CONFIG_HOTPLUG_CPU */
1da177e4 246
f3de4be9 247#ifdef CONFIG_PM_SLEEP_SMP
e3920fb4
RW		 248extern int disable_nonboot_cpus(void);
249extern void enable_nonboot_cpus(void);
f3de4be9 250#else /* !CONFIG_PM_SLEEP_SMP */
e3920fb4
RW		 251static inline int disable_nonboot_cpus(void) { return 0; }
252static inline void enable_nonboot_cpus(void) {}
f3de4be9 253#endif /* !CONFIG_PM_SLEEP_SMP */
e3920fb4 254
a1a04ec3
TG		 255enum cpuhp_state {
256 CPUHP_OFFLINE,
257 CPUHP_ONLINE,
258};
259
260void cpu_startup_entry(enum cpuhp_state state);
a1a04ec3 261
d1669912
TG		 262void cpu_idle_poll_ctrl(bool enable);
263
264void arch_cpu_idle(void);
265void arch_cpu_idle_prepare(void);
266void arch_cpu_idle_enter(void);
267void arch_cpu_idle_exit(void);
268void arch_cpu_idle_dead(void);
269
1da177e4 270#endif /* _LINUX_CPU_H_ */
Linux kernel - Deliverables
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