1e8c7c482SRalf Baechle /*
2e8c7c482SRalf Baechle *
3e8c7c482SRalf Baechle * BRIEF MODULE DESCRIPTION
4e8c7c482SRalf Baechle * PROM library initialisation code, supports YAMON and U-Boot.
5e8c7c482SRalf Baechle *
6e8c7c482SRalf Baechle * Copyright 2000-2001, 2006, 2008 MontaVista Software Inc.
7e8c7c482SRalf Baechle * Author: MontaVista Software, Inc. <source@mvista.com>
8e8c7c482SRalf Baechle *
9e8c7c482SRalf Baechle * This file was derived from Carsten Langgaard's
10e8c7c482SRalf Baechle * arch/mips/mips-boards/xx files.
11e8c7c482SRalf Baechle *
12e8c7c482SRalf Baechle * Carsten Langgaard, carstenl@mips.com
13e8c7c482SRalf Baechle * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
14e8c7c482SRalf Baechle *
15e8c7c482SRalf Baechle * This program is free software; you can redistribute it and/or modify it
16e8c7c482SRalf Baechle * under the terms of the GNU General Public License as published by the
17e8c7c482SRalf Baechle * Free Software Foundation; either version 2 of the License, or (at your
18e8c7c482SRalf Baechle * option) any later version.
19e8c7c482SRalf Baechle *
20e8c7c482SRalf Baechle * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21e8c7c482SRalf Baechle * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22e8c7c482SRalf Baechle * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23e8c7c482SRalf Baechle * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24e8c7c482SRalf Baechle * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25e8c7c482SRalf Baechle * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26e8c7c482SRalf Baechle * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27e8c7c482SRalf Baechle * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28e8c7c482SRalf Baechle * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29e8c7c482SRalf Baechle * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30e8c7c482SRalf Baechle *
31e8c7c482SRalf Baechle * You should have received a copy of the GNU General Public License along
32e8c7c482SRalf Baechle * with this program; if not, write to the Free Software Foundation, Inc.,
33e8c7c482SRalf Baechle * 675 Mass Ave, Cambridge, MA 02139, USA.
34e8c7c482SRalf Baechle */
35e8c7c482SRalf Baechle
36e8c7c482SRalf Baechle #include <linux/init.h>
37026ba130SThomas Bogendoerfer #include <linux/kernel.h>
38e7ae8d17SThomas Bogendoerfer #include <linux/memblock.h>
39026ba130SThomas Bogendoerfer #include <linux/sizes.h>
40e8c7c482SRalf Baechle #include <linux/string.h>
41e8c7c482SRalf Baechle
42e8c7c482SRalf Baechle #include <asm/bootinfo.h>
43e8c7c482SRalf Baechle
44e8c7c482SRalf Baechle int prom_argc;
45e8c7c482SRalf Baechle char **prom_argv;
46e8c7c482SRalf Baechle char **prom_envp;
47e8c7c482SRalf Baechle
prom_init_cmdline(void)482b877a3fSManuel Lauss void __init prom_init_cmdline(void)
49e8c7c482SRalf Baechle {
5010229f37SYoichi Yuasa int i;
51e8c7c482SRalf Baechle
5210229f37SYoichi Yuasa for (i = 1; i < prom_argc; i++) {
5310229f37SYoichi Yuasa strlcat(arcs_cmdline, prom_argv[i], COMMAND_LINE_SIZE);
5410229f37SYoichi Yuasa if (i < (prom_argc - 1))
5510229f37SYoichi Yuasa strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
56e8c7c482SRalf Baechle }
57e8c7c482SRalf Baechle }
58e8c7c482SRalf Baechle
prom_getenv(char * envname)59e8c7c482SRalf Baechle char *prom_getenv(char *envname)
60e8c7c482SRalf Baechle {
61e8c7c482SRalf Baechle /*
62e8c7c482SRalf Baechle * Return a pointer to the given environment variable.
63e8c7c482SRalf Baechle * YAMON uses "name", "value" pairs, while U-Boot uses "name=value".
64e8c7c482SRalf Baechle */
65e8c7c482SRalf Baechle
66e8c7c482SRalf Baechle char **env = prom_envp;
67e8c7c482SRalf Baechle int i = strlen(envname);
68e8c7c482SRalf Baechle int yamon = (*env && strchr(*env, '=') == NULL);
69e8c7c482SRalf Baechle
70e8c7c482SRalf Baechle while (*env) {
71e8c7c482SRalf Baechle if (yamon) {
72e8c7c482SRalf Baechle if (strcmp(envname, *env++) == 0)
73e8c7c482SRalf Baechle return *env;
74e8c7c482SRalf Baechle } else if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=')
75e8c7c482SRalf Baechle return *env + i + 1;
76e8c7c482SRalf Baechle env++;
77e8c7c482SRalf Baechle }
78e8c7c482SRalf Baechle
79e8c7c482SRalf Baechle return NULL;
80e8c7c482SRalf Baechle }
81e8c7c482SRalf Baechle
prom_init(void)82026ba130SThomas Bogendoerfer void __init prom_init(void)
83026ba130SThomas Bogendoerfer {
84026ba130SThomas Bogendoerfer unsigned char *memsize_str;
85026ba130SThomas Bogendoerfer unsigned long memsize;
86026ba130SThomas Bogendoerfer
87026ba130SThomas Bogendoerfer prom_argc = (int)fw_arg0;
88026ba130SThomas Bogendoerfer prom_argv = (char **)fw_arg1;
89026ba130SThomas Bogendoerfer prom_envp = (char **)fw_arg2;
90026ba130SThomas Bogendoerfer
91026ba130SThomas Bogendoerfer prom_init_cmdline();
92026ba130SThomas Bogendoerfer
93026ba130SThomas Bogendoerfer memsize_str = prom_getenv("memsize");
94026ba130SThomas Bogendoerfer if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
95026ba130SThomas Bogendoerfer memsize = SZ_64M; /* minimum memsize is 64MB RAM */
96026ba130SThomas Bogendoerfer
97e7ae8d17SThomas Bogendoerfer memblock_add(0, memsize);
98026ba130SThomas Bogendoerfer }
99026ba130SThomas Bogendoerfer
str2hexnum(unsigned char c)100e8c7c482SRalf Baechle static inline unsigned char str2hexnum(unsigned char c)
101e8c7c482SRalf Baechle {
102e8c7c482SRalf Baechle if (c >= '0' && c <= '9')
103e8c7c482SRalf Baechle return c - '0';
104e8c7c482SRalf Baechle if (c >= 'a' && c <= 'f')
105e8c7c482SRalf Baechle return c - 'a' + 10;
106e8c7c482SRalf Baechle if (c >= 'A' && c <= 'F')
107e8c7c482SRalf Baechle return c - 'A' + 10;
108e8c7c482SRalf Baechle
109e8c7c482SRalf Baechle return 0; /* foo */
110e8c7c482SRalf Baechle }
111e8c7c482SRalf Baechle
str2eaddr(unsigned char * ea,unsigned char * str)112e8c7c482SRalf Baechle static inline void str2eaddr(unsigned char *ea, unsigned char *str)
113e8c7c482SRalf Baechle {
114e8c7c482SRalf Baechle int i;
115e8c7c482SRalf Baechle
116e8c7c482SRalf Baechle for (i = 0; i < 6; i++) {
117e8c7c482SRalf Baechle unsigned char num;
118e8c7c482SRalf Baechle
119e8c7c482SRalf Baechle if ((*str == '.') || (*str == ':'))
120e8c7c482SRalf Baechle str++;
121e8c7c482SRalf Baechle num = str2hexnum(*str++) << 4;
122e8c7c482SRalf Baechle num |= str2hexnum(*str++);
123e8c7c482SRalf Baechle ea[i] = num;
124e8c7c482SRalf Baechle }
125e8c7c482SRalf Baechle }
126e8c7c482SRalf Baechle
prom_get_ethernet_addr(char * ethernet_addr)1272b877a3fSManuel Lauss int __init prom_get_ethernet_addr(char *ethernet_addr)
128e8c7c482SRalf Baechle {
129e8c7c482SRalf Baechle char *ethaddr_str;
130e8c7c482SRalf Baechle
131e8c7c482SRalf Baechle /* Check the environment variables first */
132e8c7c482SRalf Baechle ethaddr_str = prom_getenv("ethaddr");
133e8c7c482SRalf Baechle if (!ethaddr_str) {
134e8c7c482SRalf Baechle /* Check command line */
135ae7cbef5SYoichi Yuasa ethaddr_str = strstr(arcs_cmdline, "ethaddr=");
136e8c7c482SRalf Baechle if (!ethaddr_str)
137e8c7c482SRalf Baechle return -1;
138e8c7c482SRalf Baechle
139e8c7c482SRalf Baechle ethaddr_str += strlen("ethaddr=");
140e8c7c482SRalf Baechle }
141e8c7c482SRalf Baechle
142e8c7c482SRalf Baechle str2eaddr(ethernet_addr, ethaddr_str);
143e8c7c482SRalf Baechle
144e8c7c482SRalf Baechle return 0;
145e8c7c482SRalf Baechle }
146