diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/emulation/qemu/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/drivers/emulation/qemu/qemu_debugcon.c | 41 |
2 files changed, 44 insertions, 0 deletions
diff --git a/src/drivers/emulation/qemu/Makefile.inc b/src/drivers/emulation/qemu/Makefile.inc index e7dc5edc3b..33516272dd 100644 --- a/src/drivers/emulation/qemu/Makefile.inc +++ b/src/drivers/emulation/qemu/Makefile.inc @@ -1,3 +1,6 @@ +romstage-$(CONFIG_CONSOLE_QEMU_DEBUGCON) += qemu_debugcon.c +ramstage-$(CONFIG_CONSOLE_QEMU_DEBUGCON) += qemu_debugcon.c + ramstage-$(CONFIG_DRIVERS_EMULATION_QEMU_BOCHS) += bochs.c ramstage-$(CONFIG_DRIVERS_EMULATION_QEMU_BOCHS) += cirrus.c ramstage-$(CONFIG_DRIVERS_EMULATION_QEMU_BOCHS) += ../../pc80/vga/vga_io.c diff --git a/src/drivers/emulation/qemu/qemu_debugcon.c b/src/drivers/emulation/qemu/qemu_debugcon.c new file mode 100644 index 0000000000..9c005851ea --- /dev/null +++ b/src/drivers/emulation/qemu/qemu_debugcon.c @@ -0,0 +1,41 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#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); +} |