summaryrefslogtreecommitdiffstats
path: root/arch/mips/arc/cmdline.c
blob: fd604ef28823ccf9113670c7377f53fc0c8a1a22 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * cmdline.c: Kernel command line creation using ARCS argc/argv.
 *
 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>

#include <asm/sgialib.h>
#include <asm/bootinfo.h>

#undef DEBUG_CMDLINE

char * __init prom_getcmdline(void)
{
	return arcs_cmdline;
}

static char *ignored[] = {
	"ConsoleIn=",
	"ConsoleOut=",
	"SystemPartition=",
	"OSLoader=",
	"OSLoadPartition=",
	"OSLoadFilename=",
	"OSLoadOptions="
};

static char *used_arc[][2] = {
	{ "OSLoadPartition=", "root=" },
	{ "OSLoadOptions=", "" }
};

static char * __init move_firmware_args(char* cp)
{
	char *s;
	int actr, i;

	actr = 1; /* Always ignore argv[0] */

	while (actr < prom_argc) {
		for(i = 0; i < ARRAY_SIZE(used_arc); i++) {
			int len = strlen(used_arc[i][0]);

			if (!strncmp(prom_argv(actr), used_arc[i][0], len)) {
			/* Ok, we want it. First append the replacement... */
				strcat(cp, used_arc[i][1]);
				cp += strlen(used_arc[i][1]);
				/* ... and now the argument */
				s = strstr(prom_argv(actr), "=");
				if (s) {
					s++;
					strcpy(cp, s);
					cp += strlen(s);
				}
				*cp++ = ' ';
				break;
			}
		}
		actr++;
	}

	return cp;
}

void __init prom_init_cmdline(void)
{
	char *cp;
	int actr, i;

	actr = 1; /* Always ignore argv[0] */

	cp = arcs_cmdline;
	/*
	 * Move ARC variables to the beginning to make sure they can be
	 * overridden by later arguments.
	 */
	cp = move_firmware_args(cp);

	while (actr < prom_argc) {
		for (i = 0; i < ARRAY_SIZE(ignored); i++) {
			int len = strlen(ignored[i]);

			if (!strncmp(prom_argv(actr), ignored[i], len))
				goto pic_cont;
		}
		/* Ok, we want it. */
		strcpy(cp, prom_argv(actr));
		cp += strlen(prom_argv(actr));
		*cp++ = ' ';

	pic_cont:
		actr++;
	}

	if (cp != arcs_cmdline)		/* get rid of trailing space */
		--cp;
	*cp = '\0';

#ifdef DEBUG_CMDLINE
	printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);
#endif
}
OpenPOWER on IntegriCloud