mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 07:34:12 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*
|
|
* mem_op.h
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
* (C) 1999 David A. Hinds
|
|
*/
|
|
|
|
#ifndef _LINUX_MEM_OP_H
|
|
#define _LINUX_MEM_OP_H
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/io.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(__raw_readl(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);
|
|
__raw_writel(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, void __iomem *from, size_t n)
|
|
{
|
|
__u16 *t = to;
|
|
__u16 __iomem *f = from;
|
|
size_t odd = (n & 1);
|
|
for (n >>= 1; n; n--)
|
|
*t++ = __raw_readw(f++);
|
|
if (odd)
|
|
*(__u8 *)t = readb(f);
|
|
}
|
|
|
|
static inline void copy_to_pc(void __iomem *to, const void *from, size_t n)
|
|
{
|
|
__u16 __iomem *t = to;
|
|
const __u16 *f = from;
|
|
size_t odd = (n & 1);
|
|
for (n >>= 1; n ; n--)
|
|
__raw_writew(*f++, t++);
|
|
if (odd)
|
|
writeb(*(__u8 *)f, t);
|
|
}
|
|
|
|
static inline void copy_pc_to_user(void __user *to, void __iomem *from, size_t n)
|
|
{
|
|
__u16 __user *t = to;
|
|
__u16 __iomem *f = from;
|
|
size_t odd = (n & 1);
|
|
for (n >>= 1; n ; n--)
|
|
put_user(__raw_readw(f++), t++);
|
|
if (odd)
|
|
put_user(readb(f), (char __user *)t);
|
|
}
|
|
|
|
static inline void copy_user_to_pc(void __iomem *to, void __user *from, size_t n)
|
|
{
|
|
__u16 __user *f = from;
|
|
__u16 __iomem *t = to;
|
|
short s;
|
|
char c;
|
|
size_t odd = (n & 1);
|
|
for (n >>= 1; n; n--) {
|
|
get_user(s, f++);
|
|
__raw_writew(s, t++);
|
|
}
|
|
if (odd) {
|
|
get_user(c, (char __user *)f);
|
|
writeb(c, t);
|
|
}
|
|
}
|
|
|
|
#endif /* UNSAFE_MEMCPY */
|
|
|
|
#endif /* _LINUX_MEM_OP_H */
|