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/*
* mem_op.h 1.14 2001/08/24 12:16:13
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (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
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License version 2 (the "GPL"), in
* which case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use
* your version of this file under the MPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file
* under either the MPL or the GPL.
*/
#ifndef _LINUX_MEM_OP_H
#define _LINUX_MEM_OP_H
#include <asm/uaccess.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);
from += 4; 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) {
l = get_user((int *)from);
writel_ns(l, to);
to += 4; from += 4; n -= 4;
}
while (odd--) {
c = get_user((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);
to += 2; 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);
to += 2; 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);
to += 2; 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) {
s = get_user((short *)from);
writew_ns(s, to);
to += 2; from += 2; n -= 2;
}
if (odd) {
c = get_user((char *)from);
writeb(c, to);
}
}
#endif /* UNSAFE_MEMCPY */
#endif /* _LINUX_MEM_OP_H */
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