global_data.h 2.4 KB

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  1. /*
  2. * (C) Copyright 2002-2010
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  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. #ifndef __ASM_GBL_DATA_H
  24. #define __ASM_GBL_DATA_H
  25. #include <asm/regdef.h>
  26. /*
  27. * The following data structure is placed in some memory wich is
  28. * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
  29. * some locked parts of the data cache) to allow for a minimum set of
  30. * global variables during system initialization (until we have set
  31. * up the memory controller so that we can use RAM).
  32. *
  33. * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
  34. */
  35. typedef struct global_data {
  36. bd_t *bd;
  37. unsigned long flags;
  38. unsigned long baudrate;
  39. unsigned long have_console; /* serial_init() was called */
  40. phys_size_t ram_size; /* RAM size */
  41. unsigned long reloc_off; /* Relocation Offset */
  42. unsigned long env_addr; /* Address of Environment struct */
  43. unsigned long env_valid; /* Checksum of Environment valid? */
  44. void **jt; /* jump table */
  45. char env_buf[32]; /* buffer for getenv() before reloc. */
  46. } gd_t;
  47. /*
  48. * Global Data Flags
  49. */
  50. #define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */
  51. #define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */
  52. #define GD_FLG_SILENT 0x00004 /* Silent mode */
  53. #define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */
  54. #define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */
  55. #define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */
  56. #define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */
  57. #define GD_FLG_ENV_READY 0x00080 /* Environment imported into hash table */
  58. #define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("k0")
  59. #endif /* __ASM_GBL_DATA_H */