1/*
 2 * arch/arm/include/asm/bL_switcher.h
 3 *
 4 * Created by:  Nicolas Pitre, April 2012
 5 * Copyright:   (C) 2012-2013  Linaro Limited
 6 *
 7 * This program is free software; you can redistribute it and/or modify
 8 * it under the terms of the GNU General Public License version 2 as
 9 * published by the Free Software Foundation.
10 */
11
12#ifndef ASM_BL_SWITCHER_H
13#define ASM_BL_SWITCHER_H
14
15#include <linux/compiler.h>
16#include <linux/types.h>
17
18typedef void (*bL_switch_completion_handler)(void *cookie);
19
20int bL_switch_request_cb(unsigned int cpu, unsigned int new_cluster_id,
21			 bL_switch_completion_handler completer,
22			 void *completer_cookie);
23static inline int bL_switch_request(unsigned int cpu, unsigned int new_cluster_id)
24{
25	return bL_switch_request_cb(cpu, new_cluster_id, NULL, NULL);
26}
27
28/*
29 * Register here to be notified about runtime enabling/disabling of
30 * the switcher.
31 *
32 * The notifier chain is called with the switcher activation lock held:
33 * the switcher will not be enabled or disabled during callbacks.
34 * Callbacks must not call bL_switcher_{get,put}_enabled().
35 */
36#define BL_NOTIFY_PRE_ENABLE	0
37#define BL_NOTIFY_POST_ENABLE	1
38#define BL_NOTIFY_PRE_DISABLE	2
39#define BL_NOTIFY_POST_DISABLE	3
40
41#ifdef CONFIG_BL_SWITCHER
42
43int bL_switcher_register_notifier(struct notifier_block *nb);
44int bL_switcher_unregister_notifier(struct notifier_block *nb);
45
46/*
47 * Use these functions to temporarily prevent enabling/disabling of
48 * the switcher.
49 * bL_switcher_get_enabled() returns true if the switcher is currently
50 * enabled.  Each call to bL_switcher_get_enabled() must be followed
51 * by a call to bL_switcher_put_enabled().  These functions are not
52 * recursive.
53 */
54bool bL_switcher_get_enabled(void);
55void bL_switcher_put_enabled(void);
56
57int bL_switcher_trace_trigger(void);
58int bL_switcher_get_logical_index(u32 mpidr);
59
60#else
61static inline int bL_switcher_register_notifier(struct notifier_block *nb)
62{
63	return 0;
64}
65
66static inline int bL_switcher_unregister_notifier(struct notifier_block *nb)
67{
68	return 0;
69}
70
71static inline bool bL_switcher_get_enabled(void) { return false; }
72static inline void bL_switcher_put_enabled(void) { }
73static inline int bL_switcher_trace_trigger(void) { return 0; }
74static inline int bL_switcher_get_logical_index(u32 mpidr) { return -EUNATCH; }
75#endif /* CONFIG_BL_SWITCHER */
76
77#endif

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * arch/arm/include/asm/bL_switcher.h
 4 *
 5 * Created by:  Nicolas Pitre, April 2012
 6 * Copyright:   (C) 2012-2013  Linaro Limited
 
 
 
 
 7 */
 8
 9#ifndef ASM_BL_SWITCHER_H
10#define ASM_BL_SWITCHER_H
11
12#include <linux/compiler.h>
13#include <linux/types.h>
14
15typedef void (*bL_switch_completion_handler)(void *cookie);
16
17int bL_switch_request_cb(unsigned int cpu, unsigned int new_cluster_id,
18			 bL_switch_completion_handler completer,
19			 void *completer_cookie);
20static inline int bL_switch_request(unsigned int cpu, unsigned int new_cluster_id)
21{
22	return bL_switch_request_cb(cpu, new_cluster_id, NULL, NULL);
23}
24
25/*
26 * Register here to be notified about runtime enabling/disabling of
27 * the switcher.
28 *
29 * The notifier chain is called with the switcher activation lock held:
30 * the switcher will not be enabled or disabled during callbacks.
31 * Callbacks must not call bL_switcher_{get,put}_enabled().
32 */
33#define BL_NOTIFY_PRE_ENABLE	0
34#define BL_NOTIFY_POST_ENABLE	1
35#define BL_NOTIFY_PRE_DISABLE	2
36#define BL_NOTIFY_POST_DISABLE	3
37
38#ifdef CONFIG_BL_SWITCHER
39
40int bL_switcher_register_notifier(struct notifier_block *nb);
41int bL_switcher_unregister_notifier(struct notifier_block *nb);
42
43/*
44 * Use these functions to temporarily prevent enabling/disabling of
45 * the switcher.
46 * bL_switcher_get_enabled() returns true if the switcher is currently
47 * enabled.  Each call to bL_switcher_get_enabled() must be followed
48 * by a call to bL_switcher_put_enabled().  These functions are not
49 * recursive.
50 */
51bool bL_switcher_get_enabled(void);
52void bL_switcher_put_enabled(void);
53
54int bL_switcher_trace_trigger(void);
55int bL_switcher_get_logical_index(u32 mpidr);
56
57#else
58static inline int bL_switcher_register_notifier(struct notifier_block *nb)
59{
60	return 0;
61}
62
63static inline int bL_switcher_unregister_notifier(struct notifier_block *nb)
64{
65	return 0;
66}
67
68static inline bool bL_switcher_get_enabled(void) { return false; }
69static inline void bL_switcher_put_enabled(void) { }
70static inline int bL_switcher_trace_trigger(void) { return 0; }
71static inline int bL_switcher_get_logical_index(u32 mpidr) { return -EUNATCH; }
72#endif /* CONFIG_BL_SWITCHER */
73
74#endif