You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
121 lines
2.9 KiB
121 lines
2.9 KiB
15 years ago
|
/*
|
||
|
|
* mem_op.h 1.8 1998/07/17 10:12:23
|
||
|
|
*
|
||
|
|
* The contents of this file are subject to the Mozilla Public License
|
||
|
|
* Version 1.0 (the "License"); you may not use this file except in
|
||
|
|
* compliance with the License. You may obtain a copy of the License
|
||
|
|
* at http://www.mozilla.org/MPL/
|
||
|
|
*
|
||
|
|
* Software distributed under the License is distributed on an "AS IS"
|
||
|
|
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
|
||
|
|
* the License for the specific language governing rights and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* The initial developer of the original code is David A. Hinds
|
||
|
|
* <dhinds@hyper.stanford.edu>. Portions created by David A. Hinds
|
||
|
|
* are Copyright (C) 1998 David A. Hinds. All Rights Reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LINUX_MEM_OP_H
|
||
|
|
#define _LINUX_MEM_OP_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
If UNSAFE_MEMCPY is defined, we use the (optimized) system routines
|
||
|
|
to copy between a card and kernel memory. These routines do 32-bit
|
||
|
|
operations which may not work with all PCMCIA controllers. The
|
||
|
|
safe versions defined here will do only 8-bit and 16-bit accesses.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef UNSAFE_MEMCPY
|
||
|
|
|
||
|
|
#define copy_from_pc memcpy_fromio
|
||
|
|
#define copy_to_pc memcpy_toio
|
||
|
|
|
||
|
|
static inline void copy_pc_to_user(void *to, const void *from, size_t n)
|
||
|
|
{
|
||
|
|
size_t odd = (n & 3);
|
||
|
|
n -= odd;
|
||
|
|
while (n) {
|
||
|
|
put_user(readl_ns(from), (int *)to);
|
||
|
|
(char *)from += 4; (char *)to += 4; n -= 4;
|
||
|
|
}
|
||
|
|
while (odd--)
|
||
|
|
put_user(readb((char *)from++), (char *)to++);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void copy_user_to_pc(void *to, const void *from, size_t n)
|
||
|
|
{
|
||
|
|
int l;
|
||
|
|
char c;
|
||
|
|
size_t odd = (n & 3);
|
||
|
|
n -= odd;
|
||
|
|
while (n) {
|
||
|
|
get_user(l, (int *)from);
|
||
|
|
writel_ns(l, to);
|
||
|
|
(char *)to += 4; (char *)from += 4; n -= 4;
|
||
|
|
}
|
||
|
|
while (odd--) {
|
||
|
|
get_user(c, (char *)from++);
|
||
|
|
writeb(c, (char *)to++);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* UNSAFE_MEMCPY */
|
||
|
|
|
||
|
|
static inline void copy_from_pc(void *to, const void *from, size_t n)
|
||
|
|
{
|
||
|
|
size_t odd = (n & 1);
|
||
|
|
n -= odd;
|
||
|
|
while (n) {
|
||
|
|
*(u_short *)to = readw_ns(from);
|
||
|
|
(char *)to += 2; (char *)from += 2; n -= 2;
|
||
|
|
}
|
||
|
|
if (odd)
|
||
|
|
*(u_char *)to = readb(from);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void copy_to_pc(void *to, const void *from, size_t n)
|
||
|
|
{
|
||
|
|
size_t odd = (n & 1);
|
||
|
|
n -= odd;
|
||
|
|
while (n) {
|
||
|
|
writew_ns(*(u_short *)from, to);
|
||
|
|
(char *)to += 2; (char *)from += 2; n -= 2;
|
||
|
|
}
|
||
|
|
if (odd)
|
||
|
|
writeb(*(u_char *)from, to);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void copy_pc_to_user(void *to, const void *from, size_t n)
|
||
|
|
{
|
||
|
|
size_t odd = (n & 1);
|
||
|
|
n -= odd;
|
||
|
|
while (n) {
|
||
|
|
put_user(readw_ns(from), (short *)to);
|
||
|
|
(char *)to += 2; (char *)from += 2; n -= 2;
|
||
|
|
}
|
||
|
|
if (odd)
|
||
|
|
put_user(readb(from), (char *)to);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void copy_user_to_pc(void *to, const void *from, size_t n)
|
||
|
|
{
|
||
|
|
short s;
|
||
|
|
char c;
|
||
|
|
size_t odd = (n & 1);
|
||
|
|
n -= odd;
|
||
|
|
while (n) {
|
||
|
|
get_user(s, (short *)from);
|
||
|
|
writew_ns(s, to);
|
||
|
|
(char *)to += 2; (char *)from += 2; n -= 2;
|
||
|
|
}
|
||
|
|
if (odd) {
|
||
|
|
get_user(c, (char *)from);
|
||
|
|
writeb(c, to);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* UNSAFE_MEMCPY */
|
||
|
|
|
||
|
|
#endif /* _LINUX_MEM_OP_H */
|