forked from springcute/rt-thread
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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* File : io.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Develop Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2011-01-13 weety first version
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*/
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#ifndef __ASM_ARCH_IO_H
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#define __ASM_ARCH_IO_H
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#define AT91_BASE_SYS 0xffffe800
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#define IO_SPACE_LIMIT 0xFFFFFFFF
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#define readb(a) (*(volatile unsigned char *)(a))
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#define readw(a) (*(volatile unsigned short *)(a))
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#define readl(a) (*(volatile unsigned int *)(a))
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#define writeb(v,a) (*(volatile unsigned char *)(a) = (v))
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#define writew(v,a) (*(volatile unsigned short *)(a) = (v))
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#define writel(v,a) (*(volatile unsigned int *)(a) = (v))
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rt_inline unsigned int at91_sys_read(unsigned int reg_offset)
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{
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unsigned int addr = AT91_BASE_SYS;
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return readl(addr + reg_offset);
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}
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rt_inline void at91_sys_write(unsigned int reg_offset, unsigned long value)
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{
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unsigned int addr = AT91_BASE_SYS;
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writel(value, addr + reg_offset);
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}
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#endif
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