/*-
* Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Quick and dirty trampoline to get into 64 bit (long) mode and running
* with paging enabled so that we enter the kernel at its linked address.
*/
/* GRRR. Deal with BTX that links us for a non-zero location */
.data
PT4:
.space 0x1000
PT3:
.space 0x1000
PT2:
.space 0x1000
.long 0 # high
gdt:
.long 0 # null descriptor
.long 0
.long 0x00000000 # %cs
.long 0x00209800
.long 0x00000000 # %ds
.long 0x00008000
.text
/* Be sure that interrupts are disabled */
/* Turn on EFER.LME */
/* Turn on PAE */
/* Set %cr3 for PT4 */
/* Turn on paging (implicitly sets EFER.LMA) */
/* Now we're in compatability mode. set %cs for long mode */
/* We're still running V=P, jump to entry point */