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Blackfin arch: Initial patch to add earlyprintk support

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This allows debugging of problems which happen eary in the kernel
boot process (after bootargs are parsed, but before serial subsystem
is fully initialized)

Signed-off-by: Robin Getz <[email protected]>
Signed-off-by: Bryan Wu <[email protected]>
This commit is contained in:
Robin Getz 2007-10-09 17:24:49 +08:00 • committed by Bryan Wu
commit 0ae53640b5
6 changed files with 307 additions and 29 deletions
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28
include/asm-blackfin/early_printk.h Normal file
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/*
* File: include/asm-blackfin/early_printk.h
* Author: Robin Getz <rgetz@blackfin.uclinux.org
*
* Created: 14Aug2007
* Description: function prototpyes for early printk
*
* Modified:
* Copyright 2004-2007 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifdef CONFIG_EARLY_PRINTK
extern int setup_early_printk(char *);
#else
#define setup_early_printk(fmt) do { } while (0)
#endif /* CONFIG_EARLY_PRINTK */