From cb9700ef6f5ea2db575d9a7c91c74fb5756fea48 Mon Sep 17 00:00:00 2001
From: Daniel Verkamp <daniel@drv.nu>
Date: Tue, 23 Jun 2009 16:57:05 -0400
Subject: [PATCH] [comboot] Implement INT 22h AX=000Bh (Get Serial Console
 Configuration)

Signed-off-by: Michael Brown <mcb30@etherboot.org>
---
 src/arch/i386/interface/syslinux/comboot_call.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/arch/i386/interface/syslinux/comboot_call.c b/src/arch/i386/interface/syslinux/comboot_call.c
index 30fb49a1..08fd1736 100644
--- a/src/arch/i386/interface/syslinux/comboot_call.c
+++ b/src/arch/i386/interface/syslinux/comboot_call.c
@@ -39,6 +39,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #include <gpxe/init.h>
 #include <gpxe/image.h>
 #include <usr/imgmgmt.h>
+#include "config/console.h"
+#include "config/serial.h"
 
 /** The "SYSLINUX" version string */
 static char __data16_array ( syslinux_version, [] ) = "gPXE " VERSION;
@@ -456,8 +458,14 @@ static __asmcall void int22 ( struct i386_all_regs *ix86 ) {
 		break;
 
 	case 0x000B: /* Get Serial Console Configuration */
-		/* FIXME: stub */
+#if defined(CONSOLE_SERIAL) && !defined(COMPRESERVE)
+		ix86->regs.dx = COMCONSOLE;
+		ix86->regs.cx = 115200 / COMSPEED;
+		ix86->regs.bx = 0;
+#else
 		ix86->regs.dx = 0;
+#endif
+
 		ix86->flags &= ~CF;
 		break;