1 /*
2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
4 *
5 * This program is free software; you can distribute it and/or modify it
6 * under the terms of the GNU General Public License (Version 2) as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
17 *
18 * Kernel command line creation using the prom monitor (YAMON) argc/argv.
19 */
20 #include <linux/init.h>
21 #include <linux/string.h>
22
23 #include <asm/bootinfo.h>
24
25 extern int prom_argc;
26 extern int *_prom_argv;
27
28 /*
29 * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
30 * This macro take care of sign extension.
31 */
32 #define prom_argv(index) ((char *)(((int *)(int)_prom_argv)[(index)]))
33
34 char arcs_cmdline[CL_SIZE];
35
prom_getcmdline(void)36 char * __init prom_getcmdline(void)
37 {
38 return &(arcs_cmdline[0]);
39 }
40
41
prom_init_cmdline(void)42 void __init prom_init_cmdline(void)
43 {
44 char *cp;
45 int actr;
46
47 actr = 1; /* Always ignore argv[0] */
48
49 cp = &(arcs_cmdline[0]);
50 while(actr < prom_argc) {
51 strcpy(cp, prom_argv(actr));
52 cp += strlen(prom_argv(actr));
53 *cp++ = ' ';
54 actr++;
55 }
56 if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
57 --cp;
58 *cp = '\0';
59 }
60