rt-thread-official/bsp/at91sam9g45/platform/io.h

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2011-01-13 weety first version
*/
#ifndef __ASM_ARCH_IO_H
#define __ASM_ARCH_IO_H
#define IO_SPACE_LIMIT 0xFFFFFFFF
#define readb(a) (*(volatile unsigned char *)(a))
#define readw(a) (*(volatile unsigned short *)(a))
#define readl(a) (*(volatile unsigned int *)(a))
#define writeb(v,a) (*(volatile unsigned char *)(a) = (v))
#define writew(v,a) (*(volatile unsigned short *)(a) = (v))
#define writel(v,a) (*(volatile unsigned int *)(a) = (v))
#endif