/* SPDX-License-Identifier: GPL-2.0-only */ /* * arch/arm/include/asm/bL_switcher.h * * Created by: Nicolas Pitre, April 2012 * Copyright: (C) 2012-2013 Linaro Limited */ #ifndef ASM_BL_SWITCHER_H #define ASM_BL_SWITCHER_H #include <linux/compiler.h> #include <linux/types.h> typedef void (*bL_switch_completion_handler)(void *cookie); int bL_switch_request_cb(unsigned int cpu, unsigned int new_cluster_id, bL_switch_completion_handler completer, void *completer_cookie); static inline int bL_switch_request(unsigned int cpu, unsigned int new_cluster_id) { return bL_switch_request_cb(cpu, new_cluster_id, NULL, NULL); } /* * Register here to be notified about runtime enabling/disabling of * the switcher. * * The notifier chain is called with the switcher activation lock held: * the switcher will not be enabled or disabled during callbacks. * Callbacks must not call bL_switcher_{get,put}_enabled(). */ #define BL_NOTIFY_PRE_ENABLE 0 #define BL_NOTIFY_POST_ENABLE 1 #define BL_NOTIFY_PRE_DISABLE 2 #define BL_NOTIFY_POST_DISABLE 3 #ifdef CONFIG_BL_SWITCHER int bL_switcher_register_notifier(struct notifier_block *nb); int bL_switcher_unregister_notifier(struct notifier_block *nb); /* * Use these functions to temporarily prevent enabling/disabling of * the switcher. * bL_switcher_get_enabled() returns true if the switcher is currently * enabled. Each call to bL_switcher_get_enabled() must be followed * by a call to bL_switcher_put_enabled(). These functions are not * recursive. */ bool bL_switcher_get_enabled(void); void bL_switcher_put_enabled(void); int bL_switcher_trace_trigger(void); int bL_switcher_get_logical_index(u32 mpidr); #else static inline int bL_switcher_register_notifier(struct notifier_block *nb) { return 0; } static inline int bL_switcher_unregister_notifier(struct notifier_block *nb) { return 0; } static inline bool bL_switcher_get_enabled(void) { return false; } static inline void bL_switcher_put_enabled(void) { } static inline int bL_switcher_trace_trigger(void) { return 0; } static inline int bL_switcher_get_logical_index(u32 mpidr) { return -EUNATCH; } #endif /* CONFIG_BL_SWITCHER */ #endif