52 lines
935 B
C
52 lines
935 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/module.h>
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#include <linux/types.h>
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#include <asm/io.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, const volatile void __iomem *from, long count)
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{
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char *dst = to;
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while (count) {
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count--;
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*dst++ = readb(from++);
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}
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}
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EXPORT_SYMBOL(memcpy_fromio);
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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(volatile void __iomem *to, const void *from, long count)
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{
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const char *src = from;
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while (count) {
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count--;
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writeb(*src++, to++);
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}
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}
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EXPORT_SYMBOL(memcpy_toio);
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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(volatile void __iomem *dst, int c, long count)
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{
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unsigned char ch = (char)(c & 0xff);
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while (count) {
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count--;
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writeb(ch, dst);
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dst++;
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}
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}
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EXPORT_SYMBOL(memset_io);
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