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1/*
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
4 * for more details.
5 *
6 * cmdline.c: Kernel command line creation using ARCS argc/argv.
7 *
8 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
9 */
10#include <linux/bug.h>
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/string.h>
14
15#include <asm/sgialib.h>
16#include <asm/bootinfo.h>
17
18#undef DEBUG_CMDLINE
19
20/*
21 * A 32-bit ARC PROM pass arguments and environment as 32-bit pointer.
22 * These macro take care of sign extension.
23 */
24#define prom_argv(index) ((char *) (long)argv[(index)])
25
26static char *ignored[] = {
27 "ConsoleIn=",
28 "ConsoleOut=",
29 "SystemPartition=",
30 "OSLoader=",
31 "OSLoadPartition=",
32 "OSLoadFilename=",
33 "OSLoadOptions="
34};
35
36static char *used_arc[][2] = {
37 { "OSLoadPartition=", "root=" },
38 { "OSLoadOptions=", "" }
39};
40
41static char __init *move_firmware_args(int argc, LONG *argv, char *cp)
42{
43 char *s;
44 int actr, i;
45
46 actr = 1; /* Always ignore argv[0] */
47
48 while (actr < argc) {
49 for(i = 0; i < ARRAY_SIZE(used_arc); i++) {
50 int len = strlen(used_arc[i][0]);
51
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), '=');
58 if (s) {
59 s++;
60 strcpy(cp, s);
61 cp += strlen(s);
62 }
63 *cp++ = ' ';
64 break;
65 }
66 }
67 actr++;
68 }
69
70 return cp;
71}
72
73void __init prom_init_cmdline(int argc, LONG *argv)
74{
75 char *cp;
76 int actr, i;
77
78 actr = 1; /* Always ignore argv[0] */
79
80 cp = arcs_cmdline;
81 /*
82 * Move ARC variables to the beginning to make sure they can be
83 * overridden by later arguments.
84 */
85 cp = move_firmware_args(argc, argv, cp);
86
87 while (actr < argc) {
88 for (i = 0; i < ARRAY_SIZE(ignored); i++) {
89 int len = strlen(ignored[i]);
90
91 if (!strncmp(prom_argv(actr), ignored[i], len))
92 goto pic_cont;
93 }
94 /* Ok, we want it. */
95 strcpy(cp, prom_argv(actr));
96 cp += strlen(prom_argv(actr));
97 *cp++ = ' ';
98
99 pic_cont:
100 actr++;
101 }
102
103 if (cp != arcs_cmdline) /* get rid of trailing space */
104 --cp;
105 *cp = '\0';
106
107#ifdef DEBUG_CMDLINE
108 printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);
109#endif
110}
1/*
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
4 * for more details.
5 *
6 * cmdline.c: Kernel command line creation using ARCS argc/argv.
7 *
8 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
9 */
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/string.h>
13
14#include <asm/sgialib.h>
15#include <asm/bootinfo.h>
16
17#undef DEBUG_CMDLINE
18
19static char *ignored[] = {
20 "ConsoleIn=",
21 "ConsoleOut=",
22 "SystemPartition=",
23 "OSLoader=",
24 "OSLoadPartition=",
25 "OSLoadFilename=",
26 "OSLoadOptions="
27};
28
29static char *used_arc[][2] = {
30 { "OSLoadPartition=", "root=" },
31 { "OSLoadOptions=", "" }
32};
33
34static char * __init move_firmware_args(char* cp)
35{
36 char *s;
37 int actr, i;
38
39 actr = 1; /* Always ignore argv[0] */
40
41 while (actr < prom_argc) {
42 for(i = 0; i < ARRAY_SIZE(used_arc); i++) {
43 int len = strlen(used_arc[i][0]);
44
45 if (!strncmp(prom_argv(actr), used_arc[i][0], len)) {
46 /* Ok, we want it. First append the replacement... */
47 strcat(cp, used_arc[i][1]);
48 cp += strlen(used_arc[i][1]);
49 /* ... and now the argument */
50 s = strchr(prom_argv(actr), '=');
51 if (s) {
52 s++;
53 strcpy(cp, s);
54 cp += strlen(s);
55 }
56 *cp++ = ' ';
57 break;
58 }
59 }
60 actr++;
61 }
62
63 return cp;
64}
65
66void __init prom_init_cmdline(void)
67{
68 char *cp;
69 int actr, i;
70
71 actr = 1; /* Always ignore argv[0] */
72
73 cp = arcs_cmdline;
74 /*
75 * Move ARC variables to the beginning to make sure they can be
76 * overridden by later arguments.
77 */
78 cp = move_firmware_args(cp);
79
80 while (actr < prom_argc) {
81 for (i = 0; i < ARRAY_SIZE(ignored); i++) {
82 int len = strlen(ignored[i]);
83
84 if (!strncmp(prom_argv(actr), ignored[i], len))
85 goto pic_cont;
86 }
87 /* Ok, we want it. */
88 strcpy(cp, prom_argv(actr));
89 cp += strlen(prom_argv(actr));
90 *cp++ = ' ';
91
92 pic_cont:
93 actr++;
94 }
95
96 if (cp != arcs_cmdline) /* get rid of trailing space */
97 --cp;
98 *cp = '\0';
99
100#ifdef DEBUG_CMDLINE
101 printk(KERN_DEBUG "prom cmdline: %s\n", arcs_cmdline);
102#endif
103}