| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |