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75eb82ec K |
1 | /* |
2 | * (C) Copyright 2009 mGine co. | |
3 | * unsik Kim <donari75@gmail.com> | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <command.h> | |
26 | #include <environment.h> | |
27 | #include <linux/stddef.h> | |
28 | #include <mg_disk.h> | |
29 | ||
30 | /* references to names in env_common.c */ | |
31 | extern uchar default_environment[]; | |
75eb82ec K |
32 | |
33 | char * env_name_spec = "MG_DISK"; | |
34 | ||
35 | env_t *env_ptr = 0; | |
36 | ||
37 | DECLARE_GLOBAL_DATA_PTR; | |
38 | ||
39 | uchar env_get_char_spec(int index) | |
40 | { | |
41 | return (*((uchar *) (gd->env_addr + index))); | |
42 | } | |
43 | ||
44 | void env_relocate_spec(void) | |
45 | { | |
46 | unsigned int err; | |
47 | ||
48 | err = mg_disk_init(); | |
49 | if (err) { | |
50 | puts ("*** Warning - mg_disk_init error"); | |
51 | goto OUT; | |
52 | } | |
53 | err = mg_disk_read(CONFIG_ENV_ADDR, (u_char *)env_ptr, CONFIG_ENV_SIZE); | |
54 | if (err) { | |
55 | puts ("*** Warning - mg_disk_read error"); | |
56 | goto OUT; | |
57 | } | |
58 | ||
59 | if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) { | |
60 | puts ("*** Warning - CRC error"); | |
61 | goto OUT; | |
62 | } | |
63 | ||
64 | return; | |
65 | ||
66 | OUT: | |
67 | printf (", using default environment\n\n"); | |
68 | set_default_env(); | |
69 | } | |
70 | ||
71 | int saveenv(void) | |
72 | { | |
73 | unsigned int err; | |
74 | ||
75 | env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); | |
76 | err = mg_disk_write(CONFIG_ENV_ADDR, (u_char *)env_ptr, | |
77 | CONFIG_ENV_SIZE); | |
78 | if (err) | |
79 | puts ("*** Warning - mg_disk_write error\n\n"); | |
80 | ||
81 | return err; | |
82 | } | |
83 | ||
84 | int env_init(void) | |
85 | { | |
86 | /* use default */ | |
87 | gd->env_addr = (ulong) & default_environment[0]; | |
88 | gd->env_valid = 1; | |
89 | ||
90 | return 0; | |
91 | } |