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io.c
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 1k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- #include <linux/module.h>
- #include <linux/types.h>
- #include <asm/io.h>
- /*
- * Copy data from IO memory space to "real" memory space.
- * This needs to be optimized.
- */
- void _memcpy_fromio(void * to, unsigned long from, size_t count)
- {
- while (count) {
- count--;
- *(char *) to = readb(from);
- ((char *) to)++;
- from++;
- }
- }
- /*
- * Copy data from "real" memory space to IO memory space.
- * This needs to be optimized.
- */
- void _memcpy_toio(unsigned long to, const void * from, size_t count)
- {
- while (count) {
- count--;
- writeb(*(char *) from, to);
- ((char *) from)++;
- to++;
- }
- }
- /*
- * "memset" on IO memory space.
- * This needs to be optimized.
- */
- void _memset_io(unsigned long dst, int c, size_t count)
- {
- while (count) {
- count--;
- writeb(c, dst);
- dst++;
- }
- }
- EXPORT_SYMBOL(_memcpy_fromio);
- EXPORT_SYMBOL(_memcpy_toio);
- EXPORT_SYMBOL(_memset_io);