env_mgdisk.c 1.7 KB

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  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. #include <common.h>
  24. #include <command.h>
  25. #include <environment.h>
  26. #include <linux/stddef.h>
  27. #include <mg_disk.h>
  28. char *env_name_spec = "MG_DISK";
  29. env_t *env_ptr;
  30. DECLARE_GLOBAL_DATA_PTR;
  31. void env_relocate_spec(void)
  32. {
  33. char buf[CONFIG_ENV_SIZE];
  34. unsigned int err, rc;
  35. err = mg_disk_init();
  36. if (err) {
  37. set_default_env("!mg_disk_init error");
  38. return;
  39. }
  40. err = mg_disk_read(CONFIG_ENV_ADDR, buf, CONFIG_ENV_SIZE);
  41. if (err) {
  42. set_default_env("!mg_disk_read error");
  43. return;
  44. }
  45. env_import(buf, 1);
  46. }
  47. int saveenv(void)
  48. {
  49. unsigned int err;
  50. env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
  51. err = mg_disk_write(CONFIG_ENV_ADDR, (u_char *)env_ptr,
  52. CONFIG_ENV_SIZE);
  53. if (err)
  54. puts("*** Warning - mg_disk_write error\n\n");
  55. return err;
  56. }
  57. int env_init(void)
  58. {
  59. /* use default */
  60. gd->env_addr = (ulong)&default_environment[0];
  61. gd->env_valid = 1;
  62. return 0;
  63. }