android_kernel_samsung_msm8976/include/linux/msm_remote_spinlock.h

81 lines
2.6 KiB
C
Raw Normal View History

/* Copyright (c) 2009, 2011, 2013-2015 The Linux Foundation.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
/*
* Part of this this code is based on the standard ARM spinlock
* implementation (asm/spinlock.h) found in the 2.6.29 kernel.
*/
#ifndef __ASM__ARCH_QC_REMOTE_SPINLOCK_H
#define __ASM__ARCH_QC_REMOTE_SPINLOCK_H
#include <linux/io.h>
#include <linux/types.h>
#define REMOTE_SPINLOCK_NUM_PID 128
#define REMOTE_SPINLOCK_TID_START REMOTE_SPINLOCK_NUM_PID
/* Remote spinlock definitions. */
typedef struct {
volatile uint32_t lock;
} raw_remote_spinlock_t;
typedef raw_remote_spinlock_t *_remote_spinlock_t;
#define remote_spinlock_id_t const char *
#if defined(CONFIG_REMOTE_SPINLOCK_MSM)
int _remote_spin_lock_init(remote_spinlock_id_t, _remote_spinlock_t *lock);
void _remote_spin_release_all(uint32_t pid);
void _remote_spin_lock(_remote_spinlock_t *lock);
void _remote_spin_unlock(_remote_spinlock_t *lock);
int _remote_spin_trylock(_remote_spinlock_t *lock);
int _remote_spin_release(_remote_spinlock_t *lock, uint32_t pid);
int _remote_spin_owner(_remote_spinlock_t *lock);
void _remote_spin_lock_rlock_id(_remote_spinlock_t *lock, uint32_t tid);
void _remote_spin_unlock_rlock(_remote_spinlock_t *lock);
int _remote_spin_get_hw_spinlocks_element(_remote_spinlock_t *lock);
#else
static inline
int _remote_spin_lock_init(remote_spinlock_id_t id, _remote_spinlock_t *lock)
{
return -EINVAL;
}
static inline void _remote_spin_release_all(uint32_t pid) {}
static inline void _remote_spin_lock(_remote_spinlock_t *lock) {}
static inline void _remote_spin_unlock(_remote_spinlock_t *lock) {}
static inline int _remote_spin_trylock(_remote_spinlock_t *lock)
{
return -ENODEV;
}
static inline int _remote_spin_release(_remote_spinlock_t *lock, uint32_t pid)
{
return -ENODEV;
}
static inline int _remote_spin_owner(_remote_spinlock_t *lock)
{
return -ENODEV;
}
static inline void _remote_spin_lock_rlock_id(_remote_spinlock_t *lock,
uint32_t tid) {}
static inline void _remote_spin_unlock_rlock(_remote_spinlock_t *lock) {}
static inline int _remote_spin_get_hw_spinlocks_element(
_remote_spinlock_t *lock)
{
return -ENODEV;
}
#endif
#endif /* __ASM__ARCH_QC_REMOTE_SPINLOCK_H */