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2dc64451b4
A new environment variable, "logversion", selects the log buffer behaviour. If it is not set or set to a value other than 2, then the old, Linux 2.4.4, behaviour is selected. Signed-off-by: Igor Lisitsin <igor@emcraft.com> --
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*
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* (C) Copyright 2002-2007
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* Detlev Zundel, dzu@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _LOGBUFF_H
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#define _LOGBUFF_H
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#ifdef CONFIG_LOGBUFFER
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#define LOGBUFF_MAGIC 0xc0de4ced /* Forced by code, eh! */
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#define LOGBUFF_LEN (16384) /* Must be 16k right now */
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#define LOGBUFF_MASK (LOGBUFF_LEN-1)
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#define LOGBUFF_OVERHEAD (4096) /* Logbuffer overhead for extra info */
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#define LOGBUFF_RESERVE (LOGBUFF_LEN+LOGBUFF_OVERHEAD)
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#define LOGBUFF_INITIALIZED (1<<31)
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/* The mapping used here has to be the same as in setup_ext_logbuff ()
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in linux/kernel/printk */
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typedef struct {
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union {
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struct {
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unsigned long tag;
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unsigned long start;
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unsigned long con;
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unsigned long end;
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unsigned long chars;
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} v2;
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struct {
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unsigned long dummy;
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unsigned long tag;
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unsigned long start;
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unsigned long size;
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unsigned long chars;
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} v1;
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};
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unsigned char buf[0];
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} logbuff_t;
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int drv_logbuff_init (void);
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void logbuff_init_ptrs (void);
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void logbuff_log(char *msg);
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void logbuff_reset (void);
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#endif /* CONFIG_LOGBUFFER */
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#endif /* _LOGBUFF_H */
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