3 * BRIEF MODULE DESCRIPTION
4 * PROM library initialisation code, supports YAMON and U-Boot.
6 * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc. <source@mvista.com>
9 * This file was derived from Carsten Langgaard's
10 * arch/mips/mips-boards/xx files.
12 * Carsten Langgaard, carstenl@mips.com
13 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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.
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.
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.
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/string.h>
40 #include <asm/bootinfo.h>
46 char * __init_or_module prom_getcmdline(void)
48 return &(arcs_cmdline[0]);
51 void prom_init_cmdline(void)
56 actr = 1; /* Always ignore argv[0] */
58 cp = &(arcs_cmdline[0]);
59 while (actr < prom_argc) {
60 strcpy(cp, prom_argv[actr]);
61 cp += strlen(prom_argv[actr]);
65 if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
71 char *prom_getenv(char *envname)
74 * Return a pointer to the given environment variable.
75 * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
78 char **env = prom_envp;
79 int i = strlen(envname);
80 int yamon = (*env && strchr(*env, '=') == NULL);
84 if (strcmp(envname, *env++) == 0)
86 } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
94 static inline unsigned char str2hexnum(unsigned char c)
96 if (c >= '0' && c <= '9')
98 if (c >= 'a' && c <= 'f')
100 if (c >= 'A' && c <= 'F')
106 static inline void str2eaddr(unsigned char *ea, unsigned char *str)
110 for (i = 0; i < 6; i++) {
113 if ((*str == '.') || (*str == ':'))
115 num = str2hexnum(*str++) << 4;
116 num |= str2hexnum(*str++);
121 int prom_get_ethernet_addr(char *ethernet_addr)
126 /* Check the environment variables first */
127 ethaddr_str = prom_getenv("ethaddr");
129 /* Check command line */
130 argptr = prom_getcmdline();
131 ethaddr_str = strstr(argptr, "ethaddr=");
135 ethaddr_str += strlen("ethaddr=");
138 str2eaddr(ethernet_addr, ethaddr_str);
142 EXPORT_SYMBOL(prom_get_ethernet_addr);
144 void __init prom_free_prom_memory(void)