diff options
Diffstat (limited to 'sys/i386/boot/boot2.s')
| -rw-r--r-- | sys/i386/boot/boot2.s | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sys/i386/boot/boot2.s b/sys/i386/boot/boot2.s new file mode 100644 index 0000000..d319edf --- /dev/null +++ b/sys/i386/boot/boot2.s @@ -0,0 +1,73 @@ +/* + * 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 + + |
