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1.1 root 1: /*
2: * mem_op.h 1.14 2001/08/24 12:16:13
3: *
4: * The contents of this file are subject to the Mozilla Public License
5: * Version 1.1 (the "License"); you may not use this file except in
6: * compliance with the License. You may obtain a copy of the License
7: * at http://www.mozilla.org/MPL/
8: *
9: * Software distributed under the License is distributed on an "AS IS"
10: * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
11: * the License for the specific language governing rights and
12: * limitations under the License.
13: *
14: * The initial developer of the original code is David A. Hinds
15: * <[email protected]>. Portions created by David A. Hinds
16: * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
17: *
18: * Alternatively, the contents of this file may be used under the
19: * terms of the GNU General Public License version 2 (the "GPL"), in
20: * which case the provisions of the GPL are applicable instead of the
21: * above. If you wish to allow the use of your version of this file
22: * only under the terms of the GPL and not to allow others to use
23: * your version of this file under the MPL, indicate your decision by
24: * deleting the provisions above and replace them with the notice and
25: * other provisions required by the GPL. If you do not delete the
26: * provisions above, a recipient may use your version of this file
27: * under either the MPL or the GPL.
28: */
29:
30: #ifndef _LINUX_MEM_OP_H
31: #define _LINUX_MEM_OP_H
32:
33: #include <asm/uaccess.h>
34:
35: /*
36: If UNSAFE_MEMCPY is defined, we use the (optimized) system routines
37: to copy between a card and kernel memory. These routines do 32-bit
38: operations which may not work with all PCMCIA controllers. The
39: safe versions defined here will do only 8-bit and 16-bit accesses.
40: */
41:
42: #ifdef UNSAFE_MEMCPY
43:
44: #define copy_from_pc memcpy_fromio
45: #define copy_to_pc memcpy_toio
46:
47: static inline void copy_pc_to_user(void *to, const void *from, size_t n)
48: {
49: size_t odd = (n & 3);
50: n -= odd;
51: while (n) {
52: put_user(readl_ns(from), (int *)to);
53: from += 4; to += 4; n -= 4;
54: }
55: while (odd--)
56: put_user(readb((char *)from++), (char *)to++);
57: }
58:
59: static inline void copy_user_to_pc(void *to, const void *from, size_t n)
60: {
61: int l;
62: char c;
63: size_t odd = (n & 3);
64: n -= odd;
65: while (n) {
66: l = get_user((int *)from);
67: writel_ns(l, to);
68: to += 4; from += 4; n -= 4;
69: }
70: while (odd--) {
71: c = get_user((char *)from++);
72: writeb(c, (char *)to++);
73: }
74: }
75:
76: #else /* UNSAFE_MEMCPY */
77:
78: static inline void copy_from_pc(void *to, const void *from, size_t n)
79: {
80: size_t odd = (n & 1);
81: n -= odd;
82: while (n) {
83: *(u_short *)to = readw_ns(from);
84: to += 2; from += 2; n -= 2;
85: }
86: if (odd)
87: *(u_char *)to = readb(from);
88: }
89:
90: static inline void copy_to_pc(void *to, const void *from, size_t n)
91: {
92: size_t odd = (n & 1);
93: n -= odd;
94: while (n) {
95: writew_ns(*(u_short *)from, to);
96: to += 2; from += 2; n -= 2;
97: }
98: if (odd)
99: writeb(*(u_char *)from, to);
100: }
101:
102: static inline void copy_pc_to_user(void *to, const void *from, size_t n)
103: {
104: size_t odd = (n & 1);
105: n -= odd;
106: while (n) {
107: put_user(readw_ns(from), (short *)to);
108: to += 2; from += 2; n -= 2;
109: }
110: if (odd)
111: put_user(readb(from), (char *)to);
112: }
113:
114: static inline void copy_user_to_pc(void *to, const void *from, size_t n)
115: {
116: short s;
117: char c;
118: size_t odd = (n & 1);
119: n -= odd;
120: while (n) {
121: s = get_user((short *)from);
122: writew_ns(s, to);
123: to += 2; from += 2; n -= 2;
124: }
125: if (odd) {
126: c = get_user((char *)from);
127: writeb(c, to);
128: }
129: }
130:
131: #endif /* UNSAFE_MEMCPY */
132:
133: #endif /* _LINUX_MEM_OP_H */
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