Add layout file

1 files changed, 55 insertions, 0 deletions

diff --git a/layout.inc b/layout.inc
new file mode 100644
index 00000000..0011141b
--- /dev/null
+++ b/layout.inc
@@ -0,0 +1,55 @@
+; $Id$
+; -----------------------------------------------------------------------
+;   
+;   Copyright 1994-2004 H. Peter Anvin - All Rights Reserved
+;
+;   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, Inc., 53 Temple Place Ste 330,
+;   Bostom MA 02111-1307, USA; either version 2 of the License, or
+;   (at your option) any later version; incorporated herein by reference.
+;
+; -----------------------------------------------------------------------
+
+;
+; layout.inc
+;
+; Memory layout of segments
+;
+
+
+; Memory below 0800h is reserved for the BIOS and the MBR
+BSS_START	equ 0800h
+
+; PXELINUX needs lots of BSS, so it relocates itself on startup
+%if IS_PXELINUX
+TEXT_START	equ 9000h
+%else
+TEXT_START	equ 7C00h
+%endif
+
+%ifdef MAP
+		[map all MAP]
+%endif
+
+;
+; The various sections and their relationship
+;
+		org TEXT_START
+
+		; NASM BUG: refers to hacks to handle NASM 0.98.38 bugs; might need
+		; conditional compilation
+	
+		section .earlybss nobits start=BSS_START
+		section .bcopy32  align=4 valign=16 follows=.data vfollows=.earlybss
+		; NASM BUG: follows= here should be vfollows=
+		section .bss      nobits align=256 follows=.bcopy32
+
+		section .text	  start=TEXT_START
+		; NASM BUG: follows=.text not accepted here
+		section .data	  align=16 ; follows=.text
+
+		; NASM BUG: We would like to do follows=.bcopy32
+		section .latebss  nobits align=16 start=0E000h
+
+