35 lines
667 B
C
35 lines
667 B
C
|
/*
|
||
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
||
|
|
*
|
||
|
|
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
|
||
|
|
*
|
||
|
|
* Authors:
|
||
|
|
* Anup Patel <anup.patel@wdc.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __RISCV_LOCKS_H__
|
||
|
|
#define __RISCV_LOCKS_H__
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
volatile long lock;
|
||
|
|
} spinlock_t;
|
||
|
|
|
||
|
|
#define __RISCV_SPIN_UNLOCKED 0
|
||
|
|
|
||
|
|
#define SPIN_LOCK_INIT(_lptr) (_lptr)->lock = __RISCV_SPIN_UNLOCKED
|
||
|
|
|
||
|
|
#define SPIN_LOCK_INITIALIZER \
|
||
|
|
{ \
|
||
|
|
.lock = __RISCV_SPIN_UNLOCKED, \
|
||
|
|
}
|
||
|
|
|
||
|
|
int spin_lock_check(spinlock_t *lock);
|
||
|
|
|
||
|
|
int spin_trylock(spinlock_t *lock);
|
||
|
|
|
||
|
|
void spin_lock(spinlock_t *lock);
|
||
|
|
|
||
|
|
void spin_unlock(spinlock_t *lock);
|
||
|
|
|
||
|
|
#endif
|