freebsd-dev/sys/i386/boot/boot2.s

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ArmAsm
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1993-06-12 14:58:17 +00:00
/*
* Ported to boot 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*
* Mach Operating System
* Copyright (c) 1992, 1991 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* HISTORY
* $Log: boot2.s,v $
* Revision 2.2 92/04/04 11:35:26 rpd
* From 2.5
* [92/03/30 rvb]
*
* Revision 2.2 91/04/02 14:39:21 mbj
* Put into rcs tree
* [90/02/09 rvb]
*
*/
#include "asm.h"
#define LOADMSG 1
/*
* boot2() -- second stage boot
*/
.globl _ouraddr
ENTRY(boot2)
movl %cs, %ax
movl %ax, %ds
movl %ax, %es
data32
sall $4, %eax
data32
movl %eax, _ouraddr
/* save the drive type and ID */
data32
pushl %edx
/* change to protected mode */
data32
call _real_to_prot
call _boot
ret
.data
.align 2
_ouraddr:
.long 0