4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
12 * (C) 1999 David A. Hinds
15 #ifndef _LINUX_MEM_OP_H
16 #define _LINUX_MEM_OP_H
18 #include <asm/uaccess.h>
22 If UNSAFE_MEMCPY is defined, we use the (optimized) system routines
23 to copy between a card and kernel memory. These routines do 32-bit
24 operations which may not work with all PCMCIA controllers. The
25 safe versions defined here will do only 8-bit and 16-bit accesses.
30 #define copy_from_pc memcpy_fromio
31 #define copy_to_pc memcpy_toio
33 static inline void copy_pc_to_user(void *to, const void *from, size_t n)
38 put_user(__raw_readl(from), (int *)to);
39 (char *)from += 4; (char *)to += 4; n -= 4;
42 put_user(readb((char *)from++), (char *)to++);
45 static inline void copy_user_to_pc(void *to, const void *from, size_t n)
52 get_user(l, (int *)from);
54 (char *)to += 4; (char *)from += 4; n -= 4;
57 get_user(c, (char *)from++);
58 writeb(c, (char *)to++);
62 #else /* UNSAFE_MEMCPY */
64 static inline void copy_from_pc(void *to, void __iomem *from, size_t n)
67 __u16 __iomem *f = from;
70 *t++ = __raw_readw(f++);
72 *(__u8 *)t = readb(f);
75 static inline void copy_to_pc(void __iomem *to, const void *from, size_t n)
77 __u16 __iomem *t = to;
78 const __u16 *f = from;
80 for (n >>= 1; n ; n--)
81 __raw_writew(*f++, t++);
83 writeb(*(__u8 *)f, t);
86 static inline void copy_pc_to_user(void __user *to, void __iomem *from, size_t n)
89 __u16 __iomem *f = from;
91 for (n >>= 1; n ; n--)
92 put_user(__raw_readw(f++), t++);
94 put_user(readb(f), (char __user *)t);
97 static inline void copy_user_to_pc(void __iomem *to, void __user *from, size_t n)
99 __u16 __user *f = from;
100 __u16 __iomem *t = to;
103 size_t odd = (n & 1);
104 for (n >>= 1; n; n--) {
106 __raw_writew(s, t++);
109 get_user(c, (char __user *)f);
114 #endif /* UNSAFE_MEMCPY */
116 #endif /* _LINUX_MEM_OP_H */