71eae2c35fb892666e65237bcde5e4a90e071175
[openocd.git] / src / helper / types.h
1 /***************************************************************************
2 * Copyright (C) 2004, 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2007,2008 √ėyvind Harboe *
6 * oyvind.harboe@zylin.com *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
23 #ifndef TYPES_H
24 #define TYPES_H
25
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #ifdef HAVE_SYS_TYPES_H
31 #include <sys/types.h>
32 #endif
33
34 #ifndef u8
35 typedef unsigned char u8;
36 #endif
37
38 #ifndef u16
39 typedef unsigned short u16;
40 #endif
41
42 #ifndef u32
43 typedef unsigned int u32;
44 #endif
45
46 #ifndef u64
47 typedef unsigned long long u64;
48 #endif
49
50 typedef struct jtag_tap_s jtag_tap_t;
51
52 #ifdef HAVE_STDBOOL_H
53 #include <stdbool.h>
54 #else /* HAVE_STDBOOL_H */
55 #define __bool_true_false_are_defined 1
56
57 #ifndef __cplusplus
58
59 #define false 0
60 #define true 1
61
62 #define bool _Bool
63 typedef int _Bool;
64 #endif /* __cplusplus */
65
66 #endif /* HAVE_STDBOOL_H */
67
68 /* DANGER!!!! here be dragons!
69 *
70 * Leave these fn's as byte accesses because it is safe
71 * across architectures. Clever usage of 32 bit access
72 * will create problems on some hosts.
73 *
74 * Note that the "buf" pointer in memory is probably unaligned.
75 *
76 * Were these functions to be re-written to take a 32 bit wide or 16 bit wide
77 * memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
78 * ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
79 * will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
80 * memory access works as if aligned. So what follows below will work for all
81 * platforms and gives the compiler leeway to do its own platform specific optimizations.
82 *
83 * Again, note that the "buf" pointer in memory is probably unaligned.
84 */
85
86
87 static inline u32 le_to_h_u32(const u8* buf)
88 {
89 return (u32)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
90 }
91
92 static inline u16 le_to_h_u16(const u8* buf)
93 {
94 return (u16)(buf[0] | buf[1] << 8);
95 }
96
97 static inline u32 be_to_h_u32(const u8* buf)
98 {
99 return (u32)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
100 }
101
102 static inline u16 be_to_h_u16(const u8* buf)
103 {
104 return (u16)(buf[1] | buf[0] << 8);
105 }
106
107 static inline void h_u32_to_le(u8* buf, int val)
108 {
109 buf[3] = (u8) (val >> 24);
110 buf[2] = (u8) (val >> 16);
111 buf[1] = (u8) (val >> 8);
112 buf[0] = (u8) (val >> 0);
113 }
114
115 static inline void h_u32_to_be(u8* buf, int val)
116 {
117 buf[0] = (u8) (val >> 24);
118 buf[1] = (u8) (val >> 16);
119 buf[2] = (u8) (val >> 8);
120 buf[3] = (u8) (val >> 0);
121 }
122
123 static inline void h_u16_to_le(u8* buf, int val)
124 {
125 buf[1] = (u8) (val >> 8);
126 buf[0] = (u8) (val >> 0);
127 }
128
129 static inline void h_u16_to_be(u8* buf, int val)
130 {
131 buf[0] = (u8) (val >> 8);
132 buf[1] = (u8) (val >> 0);
133 }
134
135 #endif /* TYPES_H */