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59 lines
1.2 KiB
59 lines
1.2 KiB
/*
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* linux/arch/sh/kernel/io.c
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*
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* Copyright (C) 2000 Stuart Menefy
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*
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* Provide real functions which expand to whatever the header file defined.
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* Also definitions of machine independent IO functions.
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*/
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#include <asm/io.h>
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#include <linux/module.h>
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/*
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* Copy data from IO memory space to "real" memory space.
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* This needs to be optimized.
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*/
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void memcpy_fromio(void * to, unsigned long from, unsigned long count)
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{
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char *p = to;
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while (count) {
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count--;
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*p = readb(from);
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p++;
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from++;
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}
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}
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/*
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* Copy data from "real" memory space to IO memory space.
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* This needs to be optimized.
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*/
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void memcpy_toio(unsigned long to, const void * from, unsigned long count)
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{
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const char *p = from;
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while (count) {
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count--;
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writeb(*p, to);
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p++;
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to++;
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}
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}
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/*
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* "memset" on IO memory space.
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* This needs to be optimized.
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*/
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void memset_io(unsigned long dst, int c, unsigned long count)
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{
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while (count) {
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count--;
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writeb(c, dst);
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dst++;
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}
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}
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EXPORT_SYMBOL(memcpy_fromio);
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EXPORT_SYMBOL(memcpy_toio);
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EXPORT_SYMBOL(memset_io);
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