global_data.h 3.2 KB

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  1. /*
  2. * (C) Copyright 2002-2010
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * (C) Copyright 2007
  6. * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
  7. *
  8. * See file CREDITS for list of people who contributed to this
  9. * project.
  10. *
  11. * This program is free software; you can redistribute it and/or
  12. * modify it under the terms of the GNU General Public License as
  13. * published by the Free Software Foundation; either version 2 of
  14. * the License, or (at your option) any later version.
  15. *
  16. * This program is distributed in the hope that it will be useful,
  17. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19. * GNU General Public License for more details.
  20. *
  21. * You should have received a copy of the GNU General Public License
  22. * along with this program; if not, write to the Free Software
  23. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24. * MA 02111-1307 USA
  25. */
  26. #ifndef __ASM_GBL_DATA_H
  27. #define __ASM_GBL_DATA_H
  28. #include "asm/types.h"
  29. /*
  30. * The following data structure is placed in some memory wich is
  31. * available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
  32. * some locked parts of the data cache) to allow for a minimum set of
  33. * global variables during system initialization (until we have set
  34. * up the memory controller so that we can use RAM).
  35. *
  36. * Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
  37. */
  38. typedef struct global_data {
  39. bd_t *bd;
  40. unsigned long flags;
  41. unsigned long baudrate;
  42. unsigned long cpu_clk; /* CPU clock in Hz! */
  43. unsigned long bus_clk;
  44. phys_size_t ram_size; /* RAM size */
  45. unsigned long reloc_off; /* Relocation Offset */
  46. unsigned long reset_status; /* reset status register at boot */
  47. unsigned long env_addr; /* Address of Environment struct */
  48. unsigned long env_valid; /* Checksum of Environment valid? */
  49. unsigned long have_console; /* serial_init() was called */
  50. #if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
  51. unsigned long fb_base; /* Base address of framebuffer memory */
  52. #endif
  53. #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
  54. unsigned long post_log_word; /* Record POST activities */
  55. unsigned long post_init_f_time; /* When post_init_f started */
  56. #endif
  57. #ifdef CONFIG_BOARD_TYPES
  58. unsigned long board_type;
  59. #endif
  60. #ifdef CONFIG_MODEM_SUPPORT
  61. unsigned long do_mdm_init;
  62. unsigned long be_quiet;
  63. #endif
  64. #ifdef CONFIG_LWMON
  65. unsigned long kbd_status;
  66. #endif
  67. void **jt; /* jump table */
  68. char env_buf[32]; /* buffer for getenv() before reloc. */
  69. } gd_t;
  70. /*
  71. * Global Data Flags
  72. */
  73. #define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */
  74. #define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */
  75. #define GD_FLG_SILENT 0x00004 /* Silent mode */
  76. #define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */
  77. #define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */
  78. #define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */
  79. #define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */
  80. #define GD_FLG_ENV_READY 0x00080 /* Environment imported into hash table */
  81. #define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("%g7")
  82. #endif /* __ASM_GBL_DATA_H */