logbuff.h 1.8 KB

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  1. /*
  2. * (C) Copyright 2002-2007
  3. * Detlev Zundel, dzu@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 _LOGBUFF_H
  24. #define _LOGBUFF_H
  25. #ifdef CONFIG_LOGBUFFER
  26. #define LOGBUFF_MAGIC 0xc0de4ced /* Forced by code, eh! */
  27. #define LOGBUFF_LEN (16384) /* Must be 16k right now */
  28. #define LOGBUFF_MASK (LOGBUFF_LEN-1)
  29. #define LOGBUFF_OVERHEAD (4096) /* Logbuffer overhead for extra info */
  30. #define LOGBUFF_RESERVE (LOGBUFF_LEN+LOGBUFF_OVERHEAD)
  31. /* The mapping used here has to be the same as in setup_ext_logbuff ()
  32. in linux/kernel/printk */
  33. typedef struct {
  34. union {
  35. struct {
  36. unsigned long tag;
  37. unsigned long start;
  38. unsigned long con;
  39. unsigned long end;
  40. unsigned long chars;
  41. } v2;
  42. struct {
  43. unsigned long dummy;
  44. unsigned long tag;
  45. unsigned long start;
  46. unsigned long size;
  47. unsigned long chars;
  48. } v1;
  49. };
  50. unsigned char buf[0];
  51. } logbuff_t;
  52. int drv_logbuff_init (void);
  53. void logbuff_init_ptrs (void);
  54. void logbuff_log(char *msg);
  55. void logbuff_reset (void);
  56. unsigned long logbuffer_base (void);
  57. #endif /* CONFIG_LOGBUFFER */
  58. #endif /* _LOGBUFF_H */