/* 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
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