LXR uboot/include/logbuff.h

   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
  26#ifdef CONFIG_LOGBUFFER
  27
  28#define LOGBUFF_MAGIC   0xc0de4ced      /* Forced by code, eh!  */
  29#define LOGBUFF_LEN     (16384) /* Must be 16k right now */
  30#define LOGBUFF_MASK    (LOGBUFF_LEN-1)
  31#define LOGBUFF_OVERHEAD (4096) /* Logbuffer overhead for extra info */
  32#define LOGBUFF_RESERVE (LOGBUFF_LEN+LOGBUFF_OVERHEAD)
  33
  34/* The mapping used here has to be the same as in setup_ext_logbuff ()
  35   in linux/kernel/printk */
  36
  37typedef struct {
  38        union {
  39                struct {
  40                        unsigned long   tag;
  41                        unsigned long   start;
  42                        unsigned long   con;
  43                        unsigned long   end;
  44                        unsigned long   chars;
  45                } v2;
  46                struct {
  47                        unsigned long   dummy;
  48                        unsigned long   tag;
  49                        unsigned long   start;
  50                        unsigned long   size;
  51                        unsigned long   chars;
  52                } v1;
  53        };
  54        unsigned char   buf[0];
  55} logbuff_t;
  56
  57int drv_logbuff_init (void);
  58void logbuff_init_ptrs (void);
  59void logbuff_log(char *msg);
  60void logbuff_reset (void);
  61unsigned long logbuffer_base (void);
  62
  63#endif /* CONFIG_LOGBUFFER */
  64
  65#endif /* _LOGBUFF_H */
  66