blob: 22e5a85af4d5cb1fc78069d90c3b4baa1d223b40 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 *
3 * BRIEF MODULE DESCRIPTION
4 * PROM library initialisation code, assuming a version of
5 * pmon is the boot code.
6 *
7 * Copyright 2000,2001 MontaVista Software Inc.
8 * Author: MontaVista Software, Inc.
9 * ppopov@mvista.com or source@mvista.com
10 *
11 * This file was derived from Carsten Langgaard's
12 * arch/mips/mips-boards/xx files.
13 *
14 * Carsten Langgaard, carstenl@mips.com
15 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
16 *
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License as published by the
19 * Free Software Foundation; either version 2 of the License, or (at your
20 * option) any later version.
21 *
22 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * You should have received a copy of the GNU General Public License along
34 * with this program; if not, write to the Free Software Foundation, Inc.,
35 * 675 Mass Ave, Cambridge, MA 02139, USA.
36 */
37
38#include <linux/module.h>
39#include <linux/kernel.h>
40#include <linux/init.h>
41#include <linux/string.h>
42
43#include <asm/bootinfo.h>
44
45/* #define DEBUG_CMDLINE */
46
47extern int prom_argc;
48extern char **prom_argv, **prom_envp;
49
50typedef struct
51{
52 char *name;
53/* char *val; */
54}t_env_var;
55
56
57char * prom_getcmdline(void)
58{
59 return &(arcs_cmdline[0]);
60}
61
62void prom_init_cmdline(void)
63{
64 char *cp;
65 int actr;
66
67 actr = 1; /* Always ignore argv[0] */
68
69 cp = &(arcs_cmdline[0]);
70 while(actr < prom_argc) {
71 strcpy(cp, prom_argv[actr]);
72 cp += strlen(prom_argv[actr]);
73 *cp++ = ' ';
74 actr++;
75 }
76 if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
77 --cp;
78 *cp = '\0';
79
80}
81
82
83char *prom_getenv(char *envname)
84{
85 /*
86 * Return a pointer to the given environment variable.
87 * Environment variables are stored in the form of "memsize=64".
88 */
89
90 t_env_var *env = (t_env_var *)prom_envp;
91 int i;
92
93 i = strlen(envname);
94
95 while(env->name) {
96 if(strncmp(envname, env->name, i) == 0) {
97 return(env->name + strlen(envname) + 1);
98 }
99 env++;
100 }
101 return(NULL);
102}
103
104inline unsigned char str2hexnum(unsigned char c)
105{
106 if(c >= '0' && c <= '9')
107 return c - '0';
108 if(c >= 'a' && c <= 'f')
109 return c - 'a' + 10;
110 if(c >= 'A' && c <= 'F')
111 return c - 'A' + 10;
112 return 0; /* foo */
113}
114
115inline void str2eaddr(unsigned char *ea, unsigned char *str)
116{
117 int i;
118
119 for(i = 0; i < 6; i++) {
120 unsigned char num;
121
122 if((*str == '.') || (*str == ':'))
123 str++;
124 num = str2hexnum(*str++) << 4;
125 num |= (str2hexnum(*str++));
126 ea[i] = num;
127 }
128}
129
130int get_ethernet_addr(char *ethernet_addr)
131{
132 char *ethaddr_str;
133
134 ethaddr_str = prom_getenv("ethaddr");
135 if (!ethaddr_str) {
136 printk("ethaddr not set in boot prom\n");
137 return -1;
138 }
139 str2eaddr(ethernet_addr, ethaddr_str);
140
141#if 0
142 {
143 int i;
144
145 printk("get_ethernet_addr: ");
146 for (i=0; i<5; i++)
147 printk("%02x:", (unsigned char)*(ethernet_addr+i));
148 printk("%02x\n", *(ethernet_addr+i));
149 }
150#endif
151
152 return 0;
153}
154
155unsigned long __init prom_free_prom_memory(void)
156{
157 return 0;
158}
159
160EXPORT_SYMBOL(prom_getcmdline);
161EXPORT_SYMBOL(get_ethernet_addr);
162EXPORT_SYMBOL(str2eaddr);