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1/*
2 *
3 * BRIEF MODULE DESCRIPTION
4 * PROM library initialisation code, supports YAMON and U-Boot.
5 *
6 * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc. <source@mvista.com>
8 *
9 * This file was derived from Carsten Langgaard's
10 * arch/mips/mips-boards/xx files.
11 *
12 * Carsten Langgaard, carstenl@mips.com
13 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 */
35
36#include <linux/module.h>
37#include <linux/init.h>
38#include <linux/string.h>
39
40#include <asm/bootinfo.h>
41
42int prom_argc;
43char **prom_argv;
44char **prom_envp;
45
46void __init prom_init_cmdline(void)
47{
48 int i;
49
50 for (i = 1; i < prom_argc; i++) {
51 strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
52 if (i < (prom_argc - 1))
53 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
54 }
55}
56
57char *prom_getenv(char *envname)
58{
59 /*
60 * Return a pointer to the given environment variable.
61 * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
62 */
63
64 char **env = prom_envp;
65 int i = strlen(envname);
66 int yamon = (*env && strchr(*env, '=') == NULL);
67
68 while (*env) {
69 if (yamon) {
70 if (strcmp(envname, *env++) == 0)
71 return *env;
72 } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
73 return *env + i + 1;
74 env++;
75 }
76
77 return NULL;
78}
79
80static inline unsigned char str2hexnum(unsigned char c)
81{
82 if (c >= '0' && c <= '9')
83 return c - '0';
84 if (c >= 'a' && c <= 'f')
85 return c - 'a' + 10;
86 if (c >= 'A' && c <= 'F')
87 return c - 'A' + 10;
88
89 return 0; /* foo */
90}
91
92static inline void str2eaddr(unsigned char *ea, unsigned char *str)
93{
94 int i;
95
96 for (i = 0; i < 6; i++) {
97 unsigned char num;
98
99 if ((*str == '.') || (*str == ':'))
100 str++;
101 num = str2hexnum(*str++) << 4;
102 num |= str2hexnum(*str++);
103 ea[i] = num;
104 }
105}
106
107int __init prom_get_ethernet_addr(char *ethernet_addr)
108{
109 char *ethaddr_str;
110
111 /* Check the environment variables first */
112 ethaddr_str = prom_getenv("ethaddr");
113 if (!ethaddr_str) {
114 /* Check command line */
115 ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
116 if (!ethaddr_str)
117 return -1;
118
119 ethaddr_str += strlen("ethaddr=");
120 }
121
122 str2eaddr(ethernet_addr, ethaddr_str);
123
124 return 0;
125}
126
127void __init prom_free_prom_memory(void)
128{
129}
1/*
2 *
3 * BRIEF MODULE DESCRIPTION
4 * PROM library initialisation code, supports YAMON and U-Boot.
5 *
6 * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc. <source@mvista.com>
8 *
9 * This file was derived from Carsten Langgaard's
10 * arch/mips/mips-boards/xx files.
11 *
12 * Carsten Langgaard, carstenl@mips.com
13 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 */
35
36#include <linux/init.h>
37#include <linux/kernel.h>
38#include <linux/memblock.h>
39#include <linux/sizes.h>
40#include <linux/string.h>
41
42#include <asm/bootinfo.h>
43
44int prom_argc;
45char **prom_argv;
46char **prom_envp;
47
48void __init prom_init_cmdline(void)
49{
50 int i;
51
52 for (i = 1; i < prom_argc; i++) {
53 strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
54 if (i < (prom_argc - 1))
55 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
56 }
57}
58
59char *prom_getenv(char *envname)
60{
61 /*
62 * Return a pointer to the given environment variable.
63 * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
64 */
65
66 char **env = prom_envp;
67 int i = strlen(envname);
68 int yamon = (*env && strchr(*env, '=') == NULL);
69
70 while (*env) {
71 if (yamon) {
72 if (strcmp(envname, *env++) == 0)
73 return *env;
74 } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
75 return *env + i + 1;
76 env++;
77 }
78
79 return NULL;
80}
81
82void __init prom_init(void)
83{
84 unsigned char *memsize_str;
85 unsigned long memsize;
86
87 prom_argc = (int)fw_arg0;
88 prom_argv = (char **)fw_arg1;
89 prom_envp = (char **)fw_arg2;
90
91 prom_init_cmdline();
92
93 memsize_str = prom_getenv("memsize");
94 if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
95 memsize = SZ_64M; /* minimum memsize is 64MB RAM */
96
97 memblock_add(0, memsize);
98}
99
100static inline unsigned char str2hexnum(unsigned char c)
101{
102 if (c >= '0' && c <= '9')
103 return c - '0';
104 if (c >= 'a' && c <= 'f')
105 return c - 'a' + 10;
106 if (c >= 'A' && c <= 'F')
107 return c - 'A' + 10;
108
109 return 0; /* foo */
110}
111
112static inline void str2eaddr(unsigned char *ea, unsigned char *str)
113{
114 int i;
115
116 for (i = 0; i < 6; i++) {
117 unsigned char num;
118
119 if ((*str == '.') || (*str == ':'))
120 str++;
121 num = str2hexnum(*str++) << 4;
122 num |= str2hexnum(*str++);
123 ea[i] = num;
124 }
125}
126
127int __init prom_get_ethernet_addr(char *ethernet_addr)
128{
129 char *ethaddr_str;
130
131 /* Check the environment variables first */
132 ethaddr_str = prom_getenv("ethaddr");
133 if (!ethaddr_str) {
134 /* Check command line */
135 ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
136 if (!ethaddr_str)
137 return -1;
138
139 ethaddr_str += strlen("ethaddr=");
140 }
141
142 str2eaddr(ethernet_addr, ethaddr_str);
143
144 return 0;
145}