1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/module.h>
3*4882a593Smuzhiyun #include <linux/types.h>
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <asm/io.h>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun /*
8*4882a593Smuzhiyun * Copy data from IO memory space to "real" memory space.
9*4882a593Smuzhiyun * This needs to be optimized.
10*4882a593Smuzhiyun */
memcpy_fromio(void * to,const volatile void __iomem * from,long count)11*4882a593Smuzhiyun void memcpy_fromio(void *to, const volatile void __iomem *from, long count)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun char *dst = to;
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun while (count) {
16*4882a593Smuzhiyun count--;
17*4882a593Smuzhiyun *dst++ = readb(from++);
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun }
20*4882a593Smuzhiyun EXPORT_SYMBOL(memcpy_fromio);
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /*
23*4882a593Smuzhiyun * Copy data from "real" memory space to IO memory space.
24*4882a593Smuzhiyun * This needs to be optimized.
25*4882a593Smuzhiyun */
memcpy_toio(volatile void __iomem * to,const void * from,long count)26*4882a593Smuzhiyun void memcpy_toio(volatile void __iomem *to, const void *from, long count)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun const char *src = from;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun while (count) {
31*4882a593Smuzhiyun count--;
32*4882a593Smuzhiyun writeb(*src++, to++);
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun EXPORT_SYMBOL(memcpy_toio);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun /*
38*4882a593Smuzhiyun * "memset" on IO memory space.
39*4882a593Smuzhiyun * This needs to be optimized.
40*4882a593Smuzhiyun */
memset_io(volatile void __iomem * dst,int c,long count)41*4882a593Smuzhiyun void memset_io(volatile void __iomem *dst, int c, long count)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun unsigned char ch = (char)(c & 0xff);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun while (count) {
46*4882a593Smuzhiyun count--;
47*4882a593Smuzhiyun writeb(ch, dst);
48*4882a593Smuzhiyun dst++;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun EXPORT_SYMBOL(memset_io);
52