2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * cmdline.c: Kernel command line creation using ARCS argc/argv.
8 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/string.h>
14 #include <asm/sgialib.h>
15 #include <asm/bootinfo.h>
19 char * __init prom_getcmdline(void)
24 static char *ignored[] = {
34 static char *used_arc[][2] = {
35 { "OSLoadPartition=", "root=" },
36 { "OSLoadOptions=", "" }
39 static char * __init move_firmware_args(char* cp)
44 actr = 1; /* Always ignore argv[0] */
46 while (actr < prom_argc) {
47 for(i = 0; i < ARRAY_SIZE(used_arc); i++) {
48 int len = strlen(used_arc[i][0]);
50 if (!strncmp(prom_argv(actr), used_arc[i][0], len)) {
51 /* Ok, we want it. First append the replacement... */
52 strcat(cp, used_arc[i][1]);
53 cp += strlen(used_arc[i][1]);
54 /* ... and now the argument */
55 s = strchr(prom_argv(actr), '=');
71 void __init prom_init_cmdline(void)
76 actr = 1; /* Always ignore argv[0] */
80 * Move ARC variables to the beginning to make sure they can be
81 * overridden by later arguments.
83 cp = move_firmware_args(cp);
85 while (actr < prom_argc) {
86 for (i = 0; i < ARRAY_SIZE(ignored); i++) {
87 int len = strlen(ignored[i]);
89 if (!strncmp(prom_argv(actr), ignored[i], len))
93 strcpy(cp, prom_argv(actr));
94 cp += strlen(prom_argv(actr));
101 if (cp != arcs_cmdline) /* get rid of trailing space */
106 printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);