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.
10 #include <linux/bug.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/string.h>
15 #include <asm/sgialib.h>
16 #include <asm/bootinfo.h>
21 * A 32-bit ARC PROM pass arguments and environment as 32-bit pointer.
22 * These macro take care of sign extension.
24 #define prom_argv(index) ((char *) (long)argv[(index)])
26 static char *ignored[] = {
36 static char *used_arc[][2] = {
37 { "OSLoadPartition=", "root=" },
38 { "OSLoadOptions=", "" }
41 static char __init *move_firmware_args(int argc, LONG *argv, char *cp)
46 actr = 1; /* Always ignore argv[0] */
49 for(i = 0; i < ARRAY_SIZE(used_arc); i++) {
50 int len = strlen(used_arc[i][0]);
52 if (!strncmp(prom_argv(actr), used_arc[i][0], len)) {
53 /* Ok, we want it. First append the replacement... */
54 strcat(cp, used_arc[i][1]);
55 cp += strlen(used_arc[i][1]);
56 /* ... and now the argument */
57 s = strchr(prom_argv(actr), '=');
73 void __init prom_init_cmdline(int argc, LONG *argv)
78 actr = 1; /* Always ignore argv[0] */
82 * Move ARC variables to the beginning to make sure they can be
83 * overridden by later arguments.
85 cp = move_firmware_args(argc, argv, cp);
88 for (i = 0; i < ARRAY_SIZE(ignored); i++) {
89 int len = strlen(ignored[i]);
91 if (!strncmp(prom_argv(actr), ignored[i], len))
95 strcpy(cp, prom_argv(actr));
96 cp += strlen(prom_argv(actr));
103 if (cp != arcs_cmdline) /* get rid of trailing space */
108 printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);