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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c46f46d02c
In a multi-platform kernel binary we only need one early console instance. The difficulty here is that the common early console is started by early_param(), whereas the MVME16x instance is started later by config_mvme16x(). That means some interrupt setup must be done earlier. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> [Geert] Tag debug_cons_write() with __ref to kill section mismatch warning Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2014 Finn Thain
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*/
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#include <linux/kernel.h>
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#include <linux/console.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/setup.h>
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extern void mvme16x_cons_write(struct console *co,
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const char *str, unsigned count);
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asmlinkage void __init debug_cons_nputs(const char *s, unsigned n);
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static void __ref debug_cons_write(struct console *c,
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const char *s, unsigned n)
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{
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#if !(defined(CONFIG_SUN3) || defined(CONFIG_M68360) || \
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defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE))
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if (MACH_IS_MVME16x)
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mvme16x_cons_write(c, s, n);
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else
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debug_cons_nputs(s, n);
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#endif
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}
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static struct console early_console_instance = {
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.name = "debug",
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.write = debug_cons_write,
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.flags = CON_PRINTBUFFER | CON_BOOT,
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.index = -1
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};
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static int __init setup_early_printk(char *buf)
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{
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if (early_console || buf)
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return 0;
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early_console = &early_console_instance;
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register_console(early_console);
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return 0;
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}
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early_param("earlyprintk", setup_early_printk);
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/*
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* debug_cons_nputs() defined in arch/m68k/kernel/head.S cannot be called
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* after init sections are discarded (for platforms that use it).
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*/
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#if !(defined(CONFIG_SUN3) || defined(CONFIG_M68360) || \
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defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE))
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static int __init unregister_early_console(void)
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{
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if (!early_console || MACH_IS_MVME16x)
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return 0;
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return unregister_console(early_console);
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}
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late_initcall(unregister_early_console);
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#endif
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