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#include <linux/export.h>
#include <linux/types.h>
#include <linux/io.h>
/*
* Copy data from IO memory space to "real" memory space.
* This needs to be optimized.
*/
void _memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)
{
unsigned char *t = to;
while (count) {
count--;
*t = readb(from);
t++;
from++;
}
}
/*
* Copy data from "real" memory space to IO memory space.
* This needs to be optimized.
*/
void _memcpy_toio(volatile void __iomem *to, const void *from, size_t count)
{
/*const unsigned char *f = from;
while (count) {
count--;
writeb(*f, to);
f++;
to++;
}*/
/*Dannierchen update for 4 byte data memory cpy*/
void *vdest = (void __force *) to;
//__asm__ __volatile__ ("sync" : : : "memory");
while(count && ((((unsigned long)vdest)&3) || (((unsigned long)from)&3))) {
*((volatile u8 *)vdest) = *((u8 *)from);
from++;
vdest++;
count--;
/*printk("start sf_write(vdest:0x%x, from:0x%x )\n", vdest, from);*/
}
while(count >= 4) {
*((volatile u32 *)vdest) = *((volatile u32 *)from);
from += 4;
vdest += 4;
count-=4;
}
while(count) {
*((volatile u8 *)vdest) = *((u8 *)from);
from++;
vdest++;
count--;
/*printk("end sf_write(vdest:0x%x, from:0x%x )\n", vdest, from);*/
}
//__asm__ __volatile__ ("sync" : : : "memory");
}
/*
* "memset" on IO memory space.
* This needs to be optimized.
*/
void _memset_io(volatile void __iomem *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);
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