include/arch/arm/cortex_m/sys_io.h

/*
 * Copyright (c) 2016 Wind River Systems, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @brief ARM CORTEX-M Series memory mapped register I/O operations
 */

#ifndef _CORTEX_M_SYS_IO_H_
#define _CORTEX_M_SYS_IO_H_

#if !defined(_ASMLANGUAGE)

#include <sys_io.h>

/* Memory mapped registers I/O functions */

static inline uint32_t sys_read32(mem_addr_t addr)
{
	return *(volatile uint32_t *)addr;
}


static inline void sys_write32(uint32_t data, mem_addr_t addr)
{
	*(volatile uint32_t *)addr = data;
}


/* Memory bit manipulation functions */

static inline void sys_set_bit(mem_addr_t addr, unsigned int bit)
{
	uint32_t temp = *(volatile uint32_t *)addr;

	*(volatile uint32_t *)addr = temp | (1 << bit);
}

static inline void sys_clear_bit(mem_addr_t addr, unsigned int bit)
{
	uint32_t temp = *(volatile uint32_t *)addr;

	*(volatile uint32_t *)addr = temp & ~(1 << bit);
}

#endif /* !_ASMLANGUAGE */

#endif /* _CORTEX_M_SYS_IO_H_ */