add diskless support.

stage2/nbloader.S

@@ -0,0 +1,49 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2000   Free Software Foundation, Inc.
+ *
+ *  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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <nbi.h>
+#include <diskless_size.h>
+			
+	.file	"nbloader.S"
+	.text
+
+	/* Just a dummy entry */
+.globl _start; _start:
+
+	/*
+	 * netboot image header
+	 */
+
+	.long	NBI_MAGIC
+	.long	0x00000004
+	/* load address of the first block  */
+	.word	NBI_DEST_ADDR
+	.word	0x0000
+	/* start addr of the code (stage 2) */
+	.word	NBI_DEST_ADDR + 0x0200
+	.word	0x0000
+
+	.long	0x04000004
+	.long	NBI_DEST_ADDR + 0x0200
+	.long	DISKLESS_SIZE + 0x200
+	.long	DISKLESS_SIZE + 0x200
+
+	/* This ensures that the length of this image will be 1 sector */
+	. = _start + 0x200 - 1
+	.byte	0