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1da177e4 LT |
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 *)(long)_prom_argv[(index)]) | |
33 | ||
34 | char * __init prom_getcmdline(void) | |
35 | { | |
36 | return &(arcs_cmdline[0]); | |
37 | } | |
38 | ||
39 | ||
40 | void __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 | } |