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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Red Hat Inc.
* Written by Gerd Hoffmann <kraxel@redhat.com>
*
* 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; version 2 of the License.
*
* 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.
*/
#include <console/console.h>
#include <console/qemu_debugcon.h>
#include <arch/io.h>
#include <arch/early_variables.h>
static int qemu_debugcon_detected CAR_GLOBAL;
void qemu_debugcon_init(void)
{
int detected = (inb(CONFIG_CONSOLE_QEMU_DEBUGCON_PORT) == 0xe9);
car_set_var(qemu_debugcon_detected, detected);
printk(BIOS_INFO, "QEMU debugcon %s [port 0x%x]\n",
detected ? "detected" : "not found",
CONFIG_CONSOLE_QEMU_DEBUGCON_PORT);
}
void qemu_debugcon_tx_byte(unsigned char data)
{
if (car_get_var(qemu_debugcon_detected) != 0)
outb(data, CONFIG_CONSOLE_QEMU_DEBUGCON_PORT);
}
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