mirror of
https://github.com/torvalds/linux.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
52 lines
871 B
C
52 lines
871 B
C
#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, void __iomem *from, size_t count)
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{
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unsigned char *t = to;
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while (count) {
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count--;
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*t = readb(from);
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t++;
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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(void __iomem *to, const void *from, size_t count)
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{
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const unsigned char *f = from;
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while (count) {
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count--;
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writeb(*f, to);
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f++;
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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(void __iomem *dst, int c, size_t 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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