93f81bd490
repo: https://github.com/T-head-Semi/opensbi commit: 89182b257c8798e15e4c685c1af0c2862d528d2a Change-Id: I7b39d66729e0108661a6f4c9e28acbdb303684ea
71 lines
1.6 KiB
C
71 lines
1.6 KiB
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_ATOMIC_H__
|
|
#define __RISCV_ATOMIC_H__
|
|
|
|
typedef struct {
|
|
volatile long counter;
|
|
} atomic_t;
|
|
|
|
#define ATOMIC_INIT(_lptr, val) (_lptr)->counter = (val)
|
|
|
|
#define ATOMIC_INITIALIZER(val) \
|
|
{ \
|
|
.counter = (val), \
|
|
}
|
|
|
|
long atomic_read(atomic_t *atom);
|
|
|
|
void atomic_write(atomic_t *atom, long value);
|
|
|
|
long atomic_add_return(atomic_t *atom, long value);
|
|
|
|
long atomic_sub_return(atomic_t *atom, long value);
|
|
|
|
long atomic_cmpxchg(atomic_t *atom, long oldval, long newval);
|
|
|
|
long atomic_xchg(atomic_t *atom, long newval);
|
|
|
|
unsigned int atomic_raw_xchg_uint(volatile unsigned int *ptr,
|
|
unsigned int newval);
|
|
|
|
unsigned long atomic_raw_xchg_ulong(volatile unsigned long *ptr,
|
|
unsigned long newval);
|
|
/**
|
|
* Set a bit in an atomic variable and return the new value.
|
|
* @nr : Bit to set.
|
|
* @atom: atomic variable to modify
|
|
*/
|
|
int atomic_set_bit(int nr, atomic_t *atom);
|
|
|
|
/**
|
|
* Clear a bit in an atomic variable and return the new value.
|
|
* @nr : Bit to set.
|
|
* @atom: atomic variable to modify
|
|
*/
|
|
|
|
int atomic_clear_bit(int nr, atomic_t *atom);
|
|
|
|
/**
|
|
* Set a bit in any address and return the new value .
|
|
* @nr : Bit to set.
|
|
* @addr: Address to modify
|
|
*/
|
|
int atomic_raw_set_bit(int nr, volatile unsigned long *addr);
|
|
|
|
/**
|
|
* Clear a bit in any address and return the new value .
|
|
* @nr : Bit to set.
|
|
* @addr: Address to modify
|
|
*/
|
|
int atomic_raw_clear_bit(int nr, volatile unsigned long *addr);
|
|
|
|
#endif
|