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
|
/*
*
* BRIEF MODULE DESCRIPTION
* PROM library initialisation code, supports YAMON and U-Boot.
*
* Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
* Author: MontaVista Software, Inc. <source@mvista.com>
*
* This file was derived from Carsten Langgaard's
* arch/mips/mips-boards/xx files.
*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``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 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/memblock.h>
#include <linux/sizes.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <prom.h>
int prom_argc;
char **prom_argv;
char **prom_envp;
void __init prom_init_cmdline(void)
{
int i;
for (i = 1; i < prom_argc; i++) {
strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
if (i < (prom_argc - 1))
strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
}
}
char *prom_getenv(char *envname)
{
/*
* Return a pointer to the given environment variable.
* YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
*/
char **env = prom_envp;
int i = strlen(envname);
int yamon = (*env && strchr(*env, '=') == NULL);
while (*env) {
if (yamon) {
if (strcmp(envname, *env++) == 0)
return *env;
} else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
return *env + i + 1;
env++;
}
return NULL;
}
void __init prom_init(void)
{
unsigned char *memsize_str;
unsigned long memsize;
prom_argc = (int)fw_arg0;
prom_argv = (char **)fw_arg1;
prom_envp = (char **)fw_arg2;
prom_init_cmdline();
memsize_str = prom_getenv("memsize");
if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
memsize = SZ_64M; /* minimum memsize is 64MB RAM */
memblock_add(0, memsize);
}
static inline unsigned char str2hexnum(unsigned char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return 0; /* foo */
}
static inline void str2eaddr(unsigned char *ea, unsigned char *str)
{
int i;
for (i = 0; i < 6; i++) {
unsigned char num;
if ((*str == '.') || (*str == ':'))
str++;
num = str2hexnum(*str++) << 4;
num |= str2hexnum(*str++);
ea[i] = num;
}
}
int __init prom_get_ethernet_addr(char *ethernet_addr)
{
char *ethaddr_str;
/* Check the environment variables first */
ethaddr_str = prom_getenv("ethaddr");
if (!ethaddr_str) {
/* Check command line */
ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
if (!ethaddr_str)
return -1;
ethaddr_str += strlen("ethaddr=");
}
str2eaddr(ethernet_addr, ethaddr_str);
return 0;
}
|
