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
25extern int prom_argc;
26extern 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 *)(long)_prom_argv[(index)])
33
34char * __init prom_getcmdline(void)
35{
36	return &(arcs_cmdline[0]);
37}
38
39
40void  __init prom_init_cmdline(void)
41{
42	char *cp;
43	int actr;
44
45	actr = 1; /* Always ignore argv[0] */
46
47	cp = &(arcs_cmdline[0]);
48	while(actr < prom_argc) {
49	        strcpy(cp, prom_argv(actr));
50		cp += strlen(prom_argv(actr));
51		*cp++ = ' ';
52		actr++;
53	}
54	if (cp != &(arcs_cmdline[0])) {
55		/* get rid of trailing space */
56		--cp;
57		*cp = '\0';
58	}
59}