1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
*
* Copyright (c) 2012 The ChromiumOS Authors.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ENDIAN_H_
#define _ENDIAN_H_
#include <arch/io.h>
#include <arch/types.h>
#include <libpayload-config.h>
/* Endian functions from glibc 2.9 / BSD "endian.h" */
#if CONFIG(LP_BIG_ENDIAN)
#define htobe16(in) (in)
#define htobe32(in) (in)
#define htobe64(in) (in)
#define htole16(in) ((uint16_t)__builtin_bswap16(in))
#define htole32(in) ((uint32_t)__builtin_bswap32(in))
#define htole64(in) ((uint64_t)__builtin_bswap64(in))
#elif CONFIG(LP_LITTLE_ENDIAN)
#define htobe16(in) ((uint16_t)__builtin_bswap16(in))
#define htobe32(in) ((uint32_t)__builtin_bswap32(in))
#define htobe64(in) ((uint64_t)__builtin_bswap64(in))
#define htole16(in) (in)
#define htole32(in) (in)
#define htole64(in) (in)
#else
#error Cant tell if the CPU is little or big endian.
#endif /* CONFIG_*_ENDIAN */
#define be16toh(in) htobe16(in)
#define be32toh(in) htobe32(in)
#define be64toh(in) htobe64(in)
#define le16toh(in) htole16(in)
#define le32toh(in) htole32(in)
#define le64toh(in) htole64(in)
#define htonw(in) htobe16(in)
#define htonl(in) htobe32(in)
#define htonll(in) htobe64(in)
#define ntohw(in) be16toh(in)
#define ntohl(in) be32toh(in)
#define ntohll(in) be64toh(in)
/*
* Alignment-agnostic encode/decode bytestream to/from little/big endian.
*/
static inline uint16_t be16dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (uint16_t)((p[0] << 8) | p[1]);
}
static inline uint32_t be32dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint32_t)p[0] << 24) | (uint32_t)(p[1] << 16) |
(uint32_t)(p[2] << 8) | p[3]);
}
static inline uint64_t be64dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint64_t)p[0] << 56) | ((uint64_t)p[1] << 48) |
((uint64_t)p[2] << 40) | ((uint64_t)p[3] << 32) |
((uint64_t)p[4] << 24) | ((uint64_t)p[5] << 16) |
((uint64_t)p[6] << 8) | p[7]);
}
static inline uint16_t le16dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (uint16_t)((p[1] << 8) | p[0]);
}
static inline uint32_t le32dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return ((uint32_t)(p[3] << 24) | (uint32_t)(p[2] << 16) |
(uint32_t)(p[1] << 8) | p[0]);
}
static inline uint64_t le64dec(const void *pp)
{
uint8_t const *p = (uint8_t const *)pp;
return (((uint64_t)p[7] << 56) | ((uint64_t)p[6] << 48) |
((uint64_t)p[5] << 40) | ((uint64_t)p[4] << 32) |
((uint64_t)p[3] << 24) | ((uint64_t)p[2] << 16) |
((uint64_t)p[1] << 8) | p[0]);
}
static inline void bebitenc(void *pp, uint32_t u, uint8_t b)
{
uint8_t *p = (uint8_t *)pp;
int i;
for (i = 0; i < b; i++)
p[(b - 1) - i] = (u >> i*8) & 0xFF;
}
static inline void be16enc(void *pp, uint16_t u)
{
bebitenc(pp, u, 2);
}
static inline void be32enc(void *pp, uint32_t u)
{
bebitenc(pp, u, 4);
}
static inline void be64enc(void *pp, uint32_t u)
{
bebitenc(pp, u, 8);
}
static inline void lebitenc(void *pp, uint32_t u, uint8_t b)
{
uint8_t *p = (uint8_t *)pp;
int i;
for (i = 0; i < b; i++)
p[i] = (u >> i*8) & 0xFF;
}
static inline void le16enc(void *pp, uint16_t u)
{
lebitenc(pp, u, 2);
}
static inline void le32enc(void *pp, uint32_t u)
{
lebitenc(pp, u, 4);
}
static inline void le64enc(void *pp, uint32_t u)
{
lebitenc(pp, u, 8);
}
/* Deprecated names (not in glibc / BSD) */
#define htobew(in) htobe16(in)
#define htobel(in) htobe32(in)
#define htobell(in) htobe64(in)
#define htolew(in) htole16(in)
#define htolel(in) htole32(in)
#define htolell(in) htole64(in)
#define betohw(in) be16toh(in)
#define betohl(in) be32toh(in)
#define betohll(in) be64toh(in)
#define letohw(in) le16toh(in)
#define letohl(in) le32toh(in)
#define letohll(in) le64toh(in)
/* Handy bit manipulation macros */
#define __clrsetbits(endian, bits, addr, clear, set) \
write##bits(addr, hto##endian##bits((endian##bits##toh( \
read##bits(addr)) & ~((uint##bits##_t)(clear))) | (set)))
#define clrbits_le64(addr, clear) __clrsetbits(le, 64, addr, clear, 0)
#define clrbits_be64(addr, clear) __clrsetbits(be, 64, addr, clear, 0)
#define clrbits_le32(addr, clear) __clrsetbits(le, 32, addr, clear, 0)
#define clrbits_be32(addr, clear) __clrsetbits(be, 32, addr, clear, 0)
#define clrbits_le16(addr, clear) __clrsetbits(le, 16, addr, clear, 0)
#define clrbits_be16(addr, clear) __clrsetbits(be, 16, addr, clear, 0)
#define setbits_le64(addr, set) __clrsetbits(le, 64, addr, 0, set)
#define setbits_be64(addr, set) __clrsetbits(be, 64, addr, 0, set)
#define setbits_le32(addr, set) __clrsetbits(le, 32, addr, 0, set)
#define setbits_be32(addr, set) __clrsetbits(be, 32, addr, 0, set)
#define setbits_le16(addr, set) __clrsetbits(le, 16, addr, 0, set)
#define setbits_be16(addr, set) __clrsetbits(be, 16, addr, 0, set)
#define clrsetbits_le64(addr, clear, set) __clrsetbits(le, 64, addr, clear, set)
#define clrsetbits_be64(addr, clear, set) __clrsetbits(be, 64, addr, clear, set)
#define clrsetbits_le32(addr, clear, set) __clrsetbits(le, 32, addr, clear, set)
#define clrsetbits_be32(addr, clear, set) __clrsetbits(be, 32, addr, clear, set)
#define clrsetbits_le16(addr, clear, set) __clrsetbits(le, 16, addr, clear, set)
#define clrsetbits_be16(addr, clear, set) __clrsetbits(be, 16, addr, clear, set)
#define __clrsetbits_impl(bits, addr, clear, set) write##bits(addr, \
(read##bits(addr) & ~((uint##bits##_t)(clear))) | (set))
#define clrsetbits8(addr, clear, set) __clrsetbits_impl(8, addr, clear, set)
#define clrsetbits16(addr, clear, set) __clrsetbits_impl(16, addr, clear, set)
#define clrsetbits32(addr, clear, set) __clrsetbits_impl(32, addr, clear, set)
#define clrsetbits64(addr, clear, set) __clrsetbits_impl(64, addr, clear, set)
#define setbits8(addr, set) clrsetbits8(addr, 0, set)
#define setbits16(addr, set) clrsetbits16(addr, 0, set)
#define setbits32(addr, set) clrsetbits32(addr, 0, set)
#define setbits64(addr, set) clrsetbits64(addr, 0, set)
#define clrbits8(addr, clear) clrsetbits8(addr, clear, 0)
#define clrbits16(addr, clear) clrsetbits16(addr, clear, 0)
#define clrbits32(addr, clear) clrsetbits32(addr, clear, 0)
#define clrbits64(addr, clear) clrsetbits64(addr, clear, 0)
#endif /* _ENDIAN_H_ */
|
