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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2018 Toomas Soome <tsoome@me.com>
*/
.file "mb_header.S"
/*
* Provide fake multiboot header to support versioning and partition
* start. The fake MB header is used by versioning code located in
* usr/src/cmd/boot/common. Since the BIOS bootblock is stored on raw disk,
* this fake header is used to store the location of the version info block.
* Additionally we use it to store partition start_sector, so we can identify
* our root file system partition. Note we are using LBA64 here.
*/
#define ASM_FILE
#include <sys/multiboot.h>
.globl mb_header, start_sector
.text
.align 4
mb_header:
.long MULTIBOOT_HEADER_MAGIC
.long MULTIBOOT_AOUT_KLUDGE
.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_AOUT_KLUDGE)
.long 0 /* header_addr */
.long 0 /* load_addr */
.long 0 /* load_end_addr */
start_sector: .long 0 /* partition LBA */
.long 0
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