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Reset serial terminal to default state at boot. 

UEFI may leave the serial console in an undesireable state (incorrect
foreground and background colour, etc) when exiting. Send ANSI escape
sequences when setting up the early console attachments to turn off
character attributes and erase from the cursor to the end of the screen.
This commit is contained in:
jmcneill 2021-02-12 12:26:09 +00:00
parent 53e7d520bd
commit 3771b87f20
1 changed files with 10 additions and 2 deletions
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12
sys/arch/arm/acpi/acpi_platform.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: acpi_platform.c,v 1.23 2021/02/04 22:36:52 thorpej Exp $ */
/* $NetBSD: acpi_platform.c,v 1.24 2021/02/12 12:26:09 jmcneill Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@ -35,13 +35,14 @@
#include "opt_multiprocessor.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.23 2021/02/04 22:36:52 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi_platform.c,v 1.24 2021/02/12 12:26:09 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/termios.h>
#include <sys/kprintf.h>
#include <dev/fdt/fdtvar.h>
#include <arm/fdt/arm_fdtvar.h>
@ -214,6 +215,13 @@ acpi_platform_attach_uart(ACPI_TABLE_SPCR *spcr)
break;
}
/*
* UEFI firmware may leave the console in an undesireable state (wrong
* foreground/background colour, etc). Reset the terminal and clear
* text from the cursor to the end of the screne.
*/
printf_flags(TOCONS|NOTSTAMP, "\033[0m");
printf_flags(TOCONS|NOTSTAMP, "\033[0J");
}
static void