/* * Copyright (c) 2006 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Helper macros for 64-bit mode switching */ /* * Long jump to 64-bit space from 32-bit compatibility mode. */ #define ENTER_64BIT_MODE() \ .code32 ;\ .byte 0xea /* far jump longmode */ ;\ .long 1f ;\ .word KERNEL64_CS ;\ .code64 ;\ 1: /* * Here in long mode but still running below 4G. * "Near" jump into uber-space. */ #define ENTER_UBERSPACE() \ mov 2f,%rax ;\ jmp *%rax ;\ 2: .long 3f ;\ .long KERNEL_UBER_BASE_HI32 ;\ 3: /* * Long jump to 32-bit compatibility mode from 64-bit space. */ #define ENTER_COMPAT_MODE() \ ljmp *4f ;\ 4: .long 5f ;\ .word KERNEL_CS ;\ .code32 ;\ 5: