1/*
2 *
3 * BRIEF MODULE DESCRIPTION
4 *    PROM library initialisation code, supports YAMON and U-Boot.
5 *
6 * Copyright 2000, 2001, 2006 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc.
8 *         	ppopov@mvista.com or source@mvista.com
9 *
10 * This file was derived from Carsten Langgaard's
11 * arch/mips/mips-boards/xx files.
12 *
13 * Carsten Langgaard, carstenl@mips.com
14 * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
15 *
16 *  This program is free software; you can redistribute  it and/or modify it
17 *  under  the terms of  the GNU General  Public License as published by the
18 *  Free Software Foundation;  either version 2 of the  License, or (at your
19 *  option) any later version.
20 *
21 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
22 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
23 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
24 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
25 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
27 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
28 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
29 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 *  You should have received a copy of the  GNU General Public License along
33 *  with this program; if not, write  to the Free Software Foundation, Inc.,
34 *  675 Mass Ave, Cambridge, MA 02139, USA.
35 */
36
37#include <linux/module.h>
38#include <linux/kernel.h>
39#include <linux/init.h>
40#include <linux/string.h>
41
42#include <asm/bootinfo.h>
43
44/* #define DEBUG_CMDLINE */
45
46extern int prom_argc;
47extern char **prom_argv, **prom_envp;
48
49
50char * __init_or_module prom_getcmdline(void)
51{
52	return &(arcs_cmdline[0]);
53}
54
55void  prom_init_cmdline(void)
56{
57	char *cp;
58	int actr;
59
60	actr = 1; /* Always ignore argv[0] */
61
62	cp = &(arcs_cmdline[0]);
63	while(actr < prom_argc) {
64	        strcpy(cp, prom_argv[actr]);
65		cp += strlen(prom_argv[actr]);
66		*cp++ = ' ';
67		actr++;
68	}
69	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
70		--cp;
71	if (prom_argc > 1)
72		*cp = '\0';
73
74}
75
76
77char *prom_getenv(char *envname)
78{
79	/*
80	 * Return a pointer to the given environment variable.
81	 * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
82	 */
83
84	char **env = prom_envp;
85	int i = strlen(envname);
86	int yamon = (*env && strchr(*env, '=') == NULL);
87
88	while (*env) {
89		if (yamon) {
90			if (strcmp(envname, *env++) == 0)
91				return *env;
92		} else {
93			if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
94				return *env + i + 1;
95		}
96		env++;
97	}
98	return NULL;
99}
100
101inline unsigned char str2hexnum(unsigned char c)
102{
103	if(c >= '0' && c <= '9')
104		return c - '0';
105	if(c >= 'a' && c <= 'f')
106		return c - 'a' + 10;
107	if(c >= 'A' && c <= 'F')
108		return c - 'A' + 10;
109	return 0; /* foo */
110}
111
112inline 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 get_ethernet_addr(char *ethernet_addr)
128{
129        char *ethaddr_str;
130
131        ethaddr_str = prom_getenv("ethaddr");
132	if (!ethaddr_str) {
133	        printk("ethaddr not set in boot prom\n");
134		return -1;
135	}
136	str2eaddr(ethernet_addr, ethaddr_str);
137
138
139	return 0;
140}
141
142void __init prom_free_prom_memory(void)
143{
144}
145
146EXPORT_SYMBOL(prom_getcmdline);
147EXPORT_SYMBOL(get_ethernet_addr);
148EXPORT_SYMBOL(str2eaddr);
149