Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
48 lines
943 B
C
48 lines
943 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/arch/arm/kernel/early_printk.c
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*
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* Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>
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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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extern void printascii(const char *);
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static void early_write(const char *s, unsigned n)
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{
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char buf[128];
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while (n) {
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unsigned l = min(n, sizeof(buf)-1);
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memcpy(buf, s, l);
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buf[l] = 0;
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s += l;
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n -= l;
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printascii(buf);
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}
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}
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static void early_console_write(struct console *con, const char *s, unsigned n)
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{
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early_write(s, n);
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}
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static struct console early_console_dev = {
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.name = "earlycon",
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.write = early_console_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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early_console = &early_console_dev;
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register_console(&early_console_dev);
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return 0;
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}
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early_param("earlyprintk", setup_early_printk);
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