| unsik Kim | 75eb82e | 2009-02-25 11:31:24 +0900 | [diff] [blame] | 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[]; |
| 32 | extern int default_environment_size; |
| 33 | |
| 34 | char * env_name_spec = "MG_DISK"; |
| 35 | |
| 36 | env_t *env_ptr = 0; |
| 37 | |
| 38 | DECLARE_GLOBAL_DATA_PTR; |
| 39 | |
| 40 | uchar env_get_char_spec(int index) |
| 41 | { |
| 42 | return (*((uchar *) (gd->env_addr + index))); |
| 43 | } |
| 44 | |
| 45 | void env_relocate_spec(void) |
| 46 | { |
| 47 | unsigned int err; |
| 48 | |
| 49 | err = mg_disk_init(); |
| 50 | if (err) { |
| 51 | puts ("*** Warning - mg_disk_init error"); |
| 52 | goto OUT; |
| 53 | } |
| 54 | err = mg_disk_read(CONFIG_ENV_ADDR, (u_char *)env_ptr, CONFIG_ENV_SIZE); |
| 55 | if (err) { |
| 56 | puts ("*** Warning - mg_disk_read error"); |
| 57 | goto OUT; |
| 58 | } |
| 59 | |
| 60 | if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) { |
| 61 | puts ("*** Warning - CRC error"); |
| 62 | goto OUT; |
| 63 | } |
| 64 | |
| 65 | return; |
| 66 | |
| 67 | OUT: |
| 68 | printf (", using default environment\n\n"); |
| 69 | set_default_env(); |
| 70 | } |
| 71 | |
| 72 | int saveenv(void) |
| 73 | { |
| 74 | unsigned int err; |
| 75 | |
| 76 | env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); |
| 77 | err = mg_disk_write(CONFIG_ENV_ADDR, (u_char *)env_ptr, |
| 78 | CONFIG_ENV_SIZE); |
| 79 | if (err) |
| 80 | puts ("*** Warning - mg_disk_write error\n\n"); |
| 81 | |
| 82 | return err; |
| 83 | } |
| 84 | |
| 85 | int env_init(void) |
| 86 | { |
| 87 | /* use default */ |
| 88 | gd->env_addr = (ulong) & default_environment[0]; |
| 89 | gd->env_valid = 1; |
| 90 | |
| 91 | return 0; |
| 92 | } |