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/*
* Copyright (c) 1996-1998 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Define a stub that copies the stashed netboot kernel clone
* down to its load address and then jumps in.
*/
#include <oskit/machine/asm.h>
#include "reboot.h"
.text
ENTRY(reboot)
/*
* Load %eax with the address of the reboot_info struct.
* The REBOOT_INFO_MAGIC will be replaced with an appropriate
* address after we are stashed in high memory.
*/
movl $REBOOT_INFO_MAGIC,%eax
/*
* Store the REBOOT_INFO_MAGIC back in ourselves before copying down
* so the startup code can again replace it with the appropriate
* address
*/
movl 12(%eax),%ebx
movl $REBOOT_INFO_MAGIC,(%ebx)
/* Save the arg into %ebx. */
movl 8(%eax),%ebx /* arg */
/* Copy the kernel down. */
movl 0(%eax),%esi /* src */
lea EXT(_start),%edi /* dst */
movl 4(%eax),%ecx /* size */
rep
movsb
/*
* Zero out the BSS.
* Note this trashes %eax, which was pointing to the reboot_info.
*/
lea EXT(edata),%edi
lea EXT(end),%ecx
subl %edi,%ecx
xorl %eax,%eax
rep
stosb
/* Now load the arg into %ebx and jump in. */
lea EXT(_start),%eax /* entry */
jmp *%eax
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