From: Simon Schubert <corecode@dragonflybsd.org>
Date: Fri, 16 Jan 2009 01:25:16 +0000 (+0100)
Subject: mbr: enable packet mode by default
X-Git-Tag: v2.3.0~31^2~2
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/74911cecaa8285bfba6653bc1f070a2c9b6725a9

mbr: enable packet mode by default

Make mbr always use packet mode if supported.
Define AVOID_PACKET_MODE to only use packet mode if necessary.
---

diff --git a/sys/boot/pc32/mbr/mbr.S b/sys/boot/pc32/mbr/mbr.S
index 58ba8bfca5..e0ba45bc87 100644
--- a/sys/boot/pc32/mbr/mbr.S
+++ b/sys/boot/pc32/mbr/mbr.S
@@ -92,10 +92,12 @@ main.5:		movw %sp,%di			 /* Save stack pointer */
 		movb 0x1(%si),%dh		 /* Load head */
 		movw 0x2(%si),%cx		 /* Load cylinder:sector */
 		movw $LOAD,%bx			 /* Transfer buffer */
+#ifdef AVOID_PACKET_MODE
 		cmpb $0xff,%dh			 /* Might we need to use LBA? */
 		jnz main.7			 /* No. */
 		cmpw $0xffff,%cx		 /* Do we need to use LBA? */
 		jnz main.7			 /* No. */
+#endif
 		pushw %cx			 /* Save %cx */
 		pushw %bx			 /* Save %bx */
 		movw $0x55aa,%bx		 /* Magic */