Made bochs e9 hack switchable by configure

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@249 a95241bf-73f2-0310-859d-f6bbb57e9c96

configure

@@ -16,6 +16,7 @@ Usage: $0 <options>
 options:
   --floppy <floppy location>    Specifies the location of the floppy
                                 (device or image).
+  --debug                       Activates bochs serial debug emulation.
   --help                        Prints out this help.
 EOF
 }
@@ -36,12 +37,14 @@ assertparam()
 #
 platform=`uname`
 floppy=
+debug=0
 
 # parse parameters
 #
 while [ $# \> 0 ] ; do
 	case "$1" in
 		--floppy)		assertparam "$1" $#; floppy=$2; shift 2;;
+		--debug)		debug=1; shift 1;;
 		--help | -h)	usage; exit 0;;
 		*)				echo Invalid argument: \`$1\'; exit 1;;
 	esac
@@ -87,3 +90,12 @@ cat << EOF > BuildConfig
 FLOPPY_PATH	= "$floppy" ;
 GCC_PATH	= ${GCC_PATH} ;
 EOF
+
+# Generate bochs debug emulation hack header
+cat << EOF > headers/private/kernel/arch/bochs_hack.h
+// Bochs serial debug emulation hack definition
+// Note: This file has been automatically generated by configure.
+
+#define BOCHS_E9_HACK    $debug
+EOF
+

src/kernel/core/arch/x86/arch_dbg_console.c

@@ -10,11 +10,13 @@
 #include <arch/cpu.h>
 #include <arch/dbg_console.h>
 
+#include <arch/bochs_hack.h>
+
 #include <stage2.h>
 
 #include <string.h>
 
-#define BOCHS_E9_HACK 0
+//#define BOCHS_E9_HACK 0
 
 // Select between COM1 and COM2 for debug output
 #define USE_COM1 1