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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Atomic operations for RISC_V */
#ifndef __CROS_EC_ATOMIC_H
#define __CROS_EC_ATOMIC_H
#include "common.h"
#include "cpu.h"
#include "task.h"
#define ATOMIC_OP(op, value, addr) \
({ \
uint32_t tmp; \
asm volatile ( \
"amo" #op ".w.aqrl %0, %2, %1" \
: "=r" (tmp), "+A" (*addr) \
: "r" (value)); \
tmp; \
})
/*
* The atomic_* functions are marked as deprecated as a part of the process of
* transaction to Zephyr compatible atomic functions. These prefixes will be
* removed in the following patches. Please see b:169151160 for more details.
*/
static inline void deprecated_atomic_clear_bits(volatile uint32_t *addr,
uint32_t bits)
{
ATOMIC_OP(and, ~bits, addr);
}
static inline void deprecated_atomic_or(volatile uint32_t *addr, uint32_t bits)
{
ATOMIC_OP(or, bits, addr);
}
static inline void deprecated_atomic_add(volatile uint32_t *addr,
uint32_t value)
{
ATOMIC_OP(add, value, addr);
}
static inline void deprecated_atomic_sub(volatile uint32_t *addr,
uint32_t value)
{
ATOMIC_OP(add, -value, addr);
}
static inline uint32_t deprecated_atomic_read_clear(volatile uint32_t *addr)
{
return ATOMIC_OP(and, 0, addr);
}
static inline uint32_t deprecated_atomic_inc(volatile uint32_t *addr,
uint32_t value)
{
return ATOMIC_OP(add, value, addr);
}
static inline uint32_t deprecated_atomic_dec(volatile uint32_t *addr,
uint32_t value)
{
return ATOMIC_OP(add, -value, addr);
}
#endif /* __CROS_EC_ATOMIC_H */
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