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14aecdd4 SH |
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 | * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. | |
7 | */ | |
8 | #include <linux/init.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/string.h> | |
11 | ||
12 | #include <asm/addrspace.h> | |
13 | #include <asm/fw/fw.h> | |
14 | ||
15 | int fw_argc; | |
16 | int *_fw_argv; | |
17 | int *_fw_envp; | |
18 | ||
19 | void __init fw_init_cmdline(void) | |
20 | { | |
21 | int i; | |
22 | ||
23 | /* Validate command line parameters. */ | |
24 | if ((fw_arg0 >= CKSEG0) || (fw_arg1 < CKSEG0)) { | |
25 | fw_argc = 0; | |
26 | _fw_argv = NULL; | |
27 | } else { | |
28 | fw_argc = (fw_arg0 & 0x0000ffff); | |
29 | _fw_argv = (int *)fw_arg1; | |
30 | } | |
31 | ||
32 | /* Validate environment pointer. */ | |
33 | if (fw_arg2 < CKSEG0) | |
34 | _fw_envp = NULL; | |
35 | else | |
36 | _fw_envp = (int *)fw_arg2; | |
37 | ||
38 | for (i = 1; i < fw_argc; i++) { | |
39 | strlcat(arcs_cmdline, fw_argv(i), COMMAND_LINE_SIZE); | |
40 | if (i < (fw_argc - 1)) | |
41 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); | |
42 | } | |
43 | } | |
44 | ||
45 | char * __init fw_getcmdline(void) | |
46 | { | |
47 | return &(arcs_cmdline[0]); | |
48 | } | |
49 | ||
50 | char *fw_getenv(char *envname) | |
51 | { | |
52 | char *result = NULL; | |
53 | ||
54 | if (_fw_envp != NULL) { | |
55 | /* | |
56 | * Return a pointer to the given environment variable. | |
57 | * YAMON uses "name", "value" pairs, while U-Boot uses | |
58 | * "name=value". | |
59 | */ | |
60 | int i, yamon, index = 0; | |
61 | ||
62 | yamon = (strchr(fw_envp(index), '=') == NULL); | |
63 | i = strlen(envname); | |
64 | ||
65 | while (fw_envp(index)) { | |
66 | if (strncmp(envname, fw_envp(index), i) == 0) { | |
67 | if (yamon) { | |
68 | result = fw_envp(index + 1); | |
69 | break; | |
70 | } else if (fw_envp(index)[i] == '=') { | |
4a792e56 | 71 | result = fw_envp(index) + i + 1; |
14aecdd4 SH |
72 | break; |
73 | } | |
74 | } | |
75 | ||
76 | /* Increment array index. */ | |
77 | if (yamon) | |
78 | index += 2; | |
79 | else | |
80 | index += 1; | |
81 | } | |
82 | } | |
83 | ||
84 | return result; | |
85 | } | |
86 | ||
87 | unsigned long fw_getenvl(char *envname) | |
88 | { | |
89 | unsigned long envl = 0UL; | |
90 | char *str; | |
14aecdd4 SH |
91 | int tmp; |
92 | ||
93 | str = fw_getenv(envname); | |
94 | if (str) { | |
484c3449 AB |
95 | tmp = kstrtoul(str, 0, &envl); |
96 | if (tmp) | |
97 | envl = 0; | |
14aecdd4 SH |
98 | } |
99 | ||
100 | return envl; | |
101 | } |