1/* $NetBSD: x86_64-asm.S,v 1.7 2019/05/21 05:29:21 mlelstv Exp $ */ 2 3/*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <machine/asm.h> 30 31/* From sys/arch/x86/include/cpufunc.h */ 32#define OPTERON_MSR_PASSCODE 0x9c5a203aU 33 34 .text 35 36ENTRY(x86_cpuid2) 37 pushq %rbx 38 movq %rdi, %rax 39 movq %rsi, %rcx 40 movq %rdx, %rsi 41 cpuid 42 movl %eax, 0(%rsi) 43 movl %ebx, 4(%rsi) 44 movl %ecx, 8(%rsi) 45 movl %edx, 12(%rsi) 46 popq %rbx 47 ret 48 49ENTRY(x86_xgetbv) 50 xorl %ecx, %ecx 51 xgetbv 52 ret 53 54ENTRY(x86_identify) 55 movl $-1,%eax 56 ret 57 58