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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 *
3 * BRIEF MODULE DESCRIPTION
Domen Puncer6fe725c2006-07-03 08:17:09 +02004 * PROM library initialisation code, supports YAMON and U-Boot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
Sergei Shtylyovc1dcb142008-04-30 23:18:41 +04006 * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc. <source@mvista.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
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 */
Sergei Shtylyovce28f942008-04-23 22:43:55 +040035
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/init.h>
37#include <linux/string.h>
38
39#include <asm/bootinfo.h>
40
Yoichi Yuasa25b31cb2007-10-15 19:11:24 +090041int prom_argc;
42char **prom_argv;
43char **prom_envp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Manuel Lauss2b877a32010-08-19 13:37:13 +020045void __init prom_init_cmdline(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
Yoichi Yuasa10229f32010-02-01 22:06:56 +090047 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Yoichi Yuasa10229f32010-02-01 22:06:56 +090049 for (i = 1; i < prom_argc; i++) {
50 strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
51 if (i < (prom_argc - 1))
52 strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070054}
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056char *prom_getenv(char *envname)
57{
58 /*
59 * Return a pointer to the given environment variable.
Domen Puncer6fe725c2006-07-03 08:17:09 +020060 * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 */
62
Domen Puncer6fe725c2006-07-03 08:17:09 +020063 char **env = prom_envp;
64 int i = strlen(envname);
65 int yamon = (*env && strchr(*env, '=') == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Domen Puncer6fe725c2006-07-03 08:17:09 +020067 while (*env) {
68 if (yamon) {
69 if (strcmp(envname, *env++) == 0)
70 return *env;
Sergei Shtylyovc1dcb142008-04-30 23:18:41 +040071 } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
72 return *env + i + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 env++;
74 }
Yoichi Yuasa25b31cb2007-10-15 19:11:24 +090075
Sergei Shtylyovfef6d6a2006-05-27 23:36:41 +040076 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
78
Yoichi Yuasa2de88922007-10-15 19:06:20 +090079static inline unsigned char str2hexnum(unsigned char c)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
Yoichi Yuasa25b31cb2007-10-15 19:11:24 +090081 if (c >= '0' && c <= '9')
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 return c - '0';
Yoichi Yuasa25b31cb2007-10-15 19:11:24 +090083 if (c >= 'a' && c <= 'f')
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 return c - 'a' + 10;
Yoichi Yuasa25b31cb2007-10-15 19:11:24 +090085 if (c >= 'A' && c <= 'F')
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 return c - 'A' + 10;
Yoichi Yuasa25b31cb2007-10-15 19:11:24 +090087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 return 0; /* foo */
89}
90
Yoichi Yuasa2de88922007-10-15 19:06:20 +090091static inline void str2eaddr(unsigned char *ea, unsigned char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
93 int i;
94
Sergei Shtylyovc1dcb142008-04-30 23:18:41 +040095 for (i = 0; i < 6; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 unsigned char num;
97
Sergei Shtylyovc1dcb142008-04-30 23:18:41 +040098 if ((*str == '.') || (*str == ':'))
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 str++;
Sergei Shtylyovc1dcb142008-04-30 23:18:41 +0400100 num = str2hexnum(*str++) << 4;
101 num |= str2hexnum(*str++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 ea[i] = num;
103 }
104}
105
Manuel Lauss2b877a32010-08-19 13:37:13 +0200106int __init prom_get_ethernet_addr(char *ethernet_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107{
Yoichi Yuasa2de88922007-10-15 19:06:20 +0900108 char *ethaddr_str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Yoichi Yuasa2de88922007-10-15 19:06:20 +0900110 /* Check the environment variables first */
111 ethaddr_str = prom_getenv("ethaddr");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 if (!ethaddr_str) {
Yoichi Yuasa2de88922007-10-15 19:06:20 +0900113 /* Check command line */
Yoichi Yuasaae7cbef2010-02-01 22:05:57 +0900114 ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
Yoichi Yuasa2de88922007-10-15 19:06:20 +0900115 if (!ethaddr_str)
116 return -1;
117
118 ethaddr_str += strlen("ethaddr=");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 }
Yoichi Yuasa2de88922007-10-15 19:06:20 +0900120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 str2eaddr(ethernet_addr, ethaddr_str);
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 return 0;
124}
125
Atsushi Nemotoc44e8d52006-12-30 00:43:59 +0900126void __init prom_free_prom_memory(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}