projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c33be57 NP |
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 | ||
| 491990e2 DM |
15 | #include <linux/compiler.h> |
| 16 | #include <linux/types.h> | |
| 17 | ||
| 0577fee2 DM |
18 | typedef void (*bL_switch_completion_handler)(void *cookie); |
| 19 | ||
| 20 | int bL_switch_request_cb(unsigned int cpu, unsigned int new_cluster_id, | |
| 21 | bL_switch_completion_handler completer, | |
| 22 | void *completer_cookie); | |
| 23 | static 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 | } | |
| 1c33be57 | 27 | |
| 491990e2 DM |
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 | ||
| 43 | int bL_switcher_register_notifier(struct notifier_block *nb); | |
| 44 | int 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 | */ | |
| c0f43751 DM |
54 | bool bL_switcher_get_enabled(void); |
| 55 | void bL_switcher_put_enabled(void); | |
| 56 | ||
| 29064b88 | 57 | int bL_switcher_trace_trigger(void); |
| d08e2e09 | 58 | int bL_switcher_get_logical_index(u32 mpidr); |
| 29064b88 | 59 | |
| 491990e2 DM |
60 | #else |
| 61 | static inline int bL_switcher_register_notifier(struct notifier_block *nb) | |
| 62 | { | |
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 66 | static inline int bL_switcher_unregister_notifier(struct notifier_block *nb) | |
| 67 | { | |
| 68 | return 0; | |
| 69 | } | |
| 70 | ||
| 71 | static inline bool bL_switcher_get_enabled(void) { return false; } | |
| 72 | static inline void bL_switcher_put_enabled(void) { } | |
| 29064b88 | 73 | static inline int bL_switcher_trace_trigger(void) { return 0; } |
| d08e2e09 | 74 | static inline int bL_switcher_get_logical_index(u32 mpidr) { return -EUNATCH; } |
| 491990e2 DM |
75 | #endif /* CONFIG_BL_SWITCHER */ |
| 76 | ||
| 1c33be57 | 77 | #endif |