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-rw-r--r--src/console/qemu_debugcon_console.c30
-rw-r--r--src/drivers/emulation/qemu/Makefile.inc3
-rw-r--r--src/drivers/emulation/qemu/qemu_debugcon.c41
-rw-r--r--src/include/console/qemu_debugcon.h7
4 files changed, 54 insertions, 27 deletions
diff --git a/src/console/qemu_debugcon_console.c b/src/console/qemu_debugcon_console.c
index 1d66d87c64..d7a53a2354 100644
--- a/src/console/qemu_debugcon_console.c
+++ b/src/console/qemu_debugcon_console.c
@@ -19,43 +19,19 @@
*/
#include <console/console.h>
-#include <arch/io.h>
-
-static unsigned char readback;
+#include <console/qemu_debugcon.h>
static void debugcon_init(void)
{
- readback = inb(CONFIG_CONSOLE_QEMU_DEBUGCON_PORT);
- printk(BIOS_INFO, "QEMU debugcon %s [port 0x%x]\n",
- (readback == 0xe9) ? "detected" : "not found",
- CONFIG_CONSOLE_QEMU_DEBUGCON_PORT);
+ qemu_debugcon_init();
}
static void debugcon_tx_byte(unsigned char data)
{
- if (readback == 0xe9) {
- outb(data, CONFIG_CONSOLE_QEMU_DEBUGCON_PORT);
- }
-}
-
-static void debugcon_tx_flush(void)
-{
-}
-
-static unsigned char debugcon_rx_byte(void)
-{
- return 0;
-}
-
-static int debugcon_tst_byte(void)
-{
- return 0;
+ qemu_debugcon_tx_byte(data);
}
static const struct console_driver debugcon_console __console = {
.init = debugcon_init,
.tx_byte = debugcon_tx_byte,
- .tx_flush = debugcon_tx_flush,
- .rx_byte = debugcon_rx_byte,
- .tst_byte = debugcon_tst_byte,
};
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);
+}
diff --git a/src/include/console/qemu_debugcon.h b/src/include/console/qemu_debugcon.h
new file mode 100644
index 0000000000..63b1455dce
--- /dev/null
+++ b/src/include/console/qemu_debugcon.h
@@ -0,0 +1,7 @@
+#ifndef _QEMU_DEBUGCON_H_
+#define _QEMU_DEBUGCON_H_
+
+void qemu_debugcon_init(void);
+void qemu_debugcon_tx_byte(unsigned char data);
+
+#endif