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
|
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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.
*/
#include <assert.h>
#include <libpayload.h>
/*
* Convert a number in BCD format to decimal.
*
* @param b The BCD number.
* @return The given BCD number in decimal format.
*/
int bcd2dec(int b)
{
return ((b >> 4) & 0x0f) * 10 + (b & 0x0f);
}
/*
* Convert a number in decimal format into the BCD format.
*
* @param d The decimal number.
* @return The given decimal number in BCD format.
*/
int dec2bcd(int d)
{
return ((d / 10) << 4) | (d % 10);
}
/**
* Return the absolute value of the specified integer.
*
* @param j The integer of which we want to know the absolute value.
* @return The absolute value of the specified integer.
*/
int abs(int j)
{
return (j >= 0 ? j : -j);
}
long int labs(long int j)
{
return (j >= 0 ? j : -j);
}
long long int llabs(long long int j)
{
return (j >= 0 ? j : -j);
}
/**
* Given a 4-bit value, return the ASCII hex representation of it.
*
* @param b A 4-bit value which shall be converted to ASCII hex.
* @return The ASCII hex representation of the specified 4-bit value.
* Returned hex-characters will always be lower-case (a-f, not A-F).
*/
u8 bin2hex(u8 b)
{
return (b < 10) ? '0' + b : 'a' + (b - 10);
}
/**
* Given an ASCII hex input character, return its integer value.
*
* For example, the input value '6' will be converted to 6, 'a'/'A' will
* be converted to 10, 'f'/'F' will be converted to 15, and so on.
*
* The return value for invalid input characters is 0.
*
* @param h The input byte in ASCII hex format.
* @return The integer value of the specified ASCII hex byte.
*/
u8 hex2bin(u8 h)
{
return (('0' <= h && h <= '9') ? (h - '0') : \
('A' <= h && h <= 'F') ? (h - 'A' + 10) : \
('a' <= h && h <= 'f') ? (h - 'a' + 10) : 0);
}
/**
* Enters HALT state, after printing msg
*
* @param msg message to print
*/
void fatal(const char *msg)
{
fprintf(stderr, "%s",msg);
halt();
}
void exit(int status)
{
printf("exited with status %d\n", status);
halt();
}
int errno;
char *getenv(const char *name)
{
return NULL;
}
#if !CONFIG(LP_ARCH_MIPS)
/*
* Reads a transfer buffer from 32-bit FIFO registers. fifo_stride is the
* distance in bytes between registers (e.g. pass 4 for a normal array of 32-bit
* registers or 0 to read everything from the same register). fifo_width is
* the amount of bytes read per register (can be 1 through 4).
*/
void buffer_from_fifo32(void *buffer, size_t size, void *fifo,
int fifo_stride, int fifo_width)
{
u8 *p = buffer;
int i, j;
assert(fifo_width > 0 && fifo_width <= sizeof(u32) &&
fifo_stride % sizeof(u32) == 0);
for (i = 0; i < size; i += fifo_width, fifo += fifo_stride) {
u32 val = read32(fifo);
for (j = 0; j < MIN(size - i, fifo_width); j++)
*p++ = (u8)(val >> (j * 8));
}
}
/*
* Version of buffer_to_fifo32() that can prepend a prefix of up to fifo_width
* size to the transfer. This is often useful for protocols where a command word
* precedes the actual payload data. The prefix must be packed in the low-order
* bytes of the 'prefix' u32 parameter and any high-order bytes exceeding prefsz
* must be 0. Note that 'size' counts total bytes written, including 'prefsz'.
*/
void buffer_to_fifo32_prefix(void *buffer, u32 prefix, int prefsz, size_t size,
void *fifo, int fifo_stride, int fifo_width)
{
u8 *p = buffer;
int i, j = prefsz;
assert(fifo_width > 0 && fifo_width <= sizeof(u32) &&
fifo_stride % sizeof(u32) == 0 && prefsz <= fifo_width);
uint32_t val = prefix;
for (i = 0; i < size; i += fifo_width, fifo += fifo_stride) {
for (; j < MIN(size - i, fifo_width); j++)
val |= *p++ << (j * 8);
write32(fifo, val);
val = 0;
j = 0;
}
}
#endif
|
