53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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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*/
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#ifndef __ASM_NIOS2_IO_H_
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#define __ASM_NIOS2_IO_H_
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#include <asm/byteorder.h>
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#define IO_SPACE_LIMIT 0
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#define __raw_writeb(v, a) (*(volatile unsigned char *)(a) = (v))
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#define __raw_writew(v, a) (*(volatile unsigned short *)(a) = (v))
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#define __raw_writel(v, a) (*(volatile unsigned int *)(a) = (v))
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#define __raw_readb(a) (*(volatile unsigned char *)(a))
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#define __raw_readw(a) (*(volatile unsigned short *)(a))
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#define __raw_readl(a) (*(volatile unsigned int *)(a))
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#define readb(addr)\
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({unsigned char val;\
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asm volatile("ldbio %0, 0(%1)" : "=r"(val) : "r" (addr)); val; })
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#define readw(addr)\
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({unsigned short val;\
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asm volatile("ldhio %0, 0(%1)" : "=r"(val) : "r" (addr)); val; })
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#define readl(addr)\
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({unsigned int val;\
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asm volatile("ldwio %0, 0(%1)" : "=r"(val) : "r" (addr)); val; })
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#define writeb(val, addr)\
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asm volatile("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
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#define writew(val, addr)\
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asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
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#define writel(val, addr)\
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asm volatile("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
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#endif /* __ASM_NIOS2_IO_H_ */
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