261 lines
7.6 KiB
C
261 lines
7.6 KiB
C
/** @file
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* IPRT - X86 and AMD64 Helpers.
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*/
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/*
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* Copyright (C) 2006-2023 Oracle and/or its affiliates.
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*
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* This file is part of VirtualBox base platform packages, as
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* available from https://www.virtualbox.org.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, in version 3 of the
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* License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses>.
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*
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* The contents of this file may alternatively be used under the terms
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* of the Common Development and Distribution License Version 1.0
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* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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* in the VirtualBox distribution, in which case the provisions of the
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* CDDL are applicable instead of those of the GPL.
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*
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* You may elect to license modified versions of this file under the
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* terms and conditions of either the GPL or the CDDL or both.
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*
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* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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*/
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#ifndef IPRT_INCLUDED_x86_helpers_h
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#define IPRT_INCLUDED_x86_helpers_h
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#ifndef RT_WITHOUT_PRAGMA_ONCE
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# pragma once
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#endif
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#include <iprt/types.h>
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/** @defgroup grp_rt_x86_helpers x86 Helper Functions
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* @ingroup grp_rt_x86
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* @{
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*/
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/**
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* Tests if it a genuine Intel CPU based on the ASMCpuId(0) output.
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*
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* @returns true/false.
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* @param uEBX EBX return from ASMCpuId(0)
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* @param uECX ECX return from ASMCpuId(0)
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* @param uEDX EDX return from ASMCpuId(0)
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*/
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DECLINLINE(bool) RTX86IsIntelCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
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{
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/* 'GenuineIntel' */
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return uEBX == UINT32_C(0x756e6547) /* 'Genu' */
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&& uEDX == UINT32_C(0x49656e69) /* 'ineI' */
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&& uECX == UINT32_C(0x6c65746e); /* 'ntel' */
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}
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/**
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* Tests if it an authentic AMD CPU based on the ASMCpuId(0) output.
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*
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* @returns true/false.
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* @param uEBX EBX return from ASMCpuId(0)
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* @param uECX ECX return from ASMCpuId(0)
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* @param uEDX EDX return from ASMCpuId(0)
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*/
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DECLINLINE(bool) RTX86IsAmdCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
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{
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/* 'AuthenticAMD' */
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return uEBX == UINT32_C(0x68747541) /* 'Auth' */
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&& uEDX == UINT32_C(0x69746e65) /* 'enti' */
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&& uECX == UINT32_C(0x444d4163); /* 'dAMD' */
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}
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/**
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* Tests if it a centaur hauling VIA CPU based on the ASMCpuId(0) output.
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*
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* @returns true/false.
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* @param uEBX EBX return from ASMCpuId(0).
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* @param uECX ECX return from ASMCpuId(0).
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* @param uEDX EDX return from ASMCpuId(0).
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*/
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DECLINLINE(bool) RTX86IsViaCentaurCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
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{
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/* 'CentaurHauls' */
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return uEBX == UINT32_C(0x746e6543) /* 'Cent' */
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&& uEDX == UINT32_C(0x48727561) /* 'aurH' */
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&& uECX == UINT32_C(0x736c7561); /* 'auls' */
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}
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/**
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* Tests if it a Shanghai CPU based on the ASMCpuId(0) output.
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*
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* @returns true/false.
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* @param uEBX EBX return from ASMCpuId(0).
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* @param uECX ECX return from ASMCpuId(0).
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* @param uEDX EDX return from ASMCpuId(0).
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*/
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DECLINLINE(bool) RTX86IsShanghaiCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
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{
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/* ' Shanghai ' */
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return uEBX == UINT32_C(0x68532020) /* ' Sh' */
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&& uEDX == UINT32_C(0x68676e61) /* 'angh' */
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&& uECX == UINT32_C(0x20206961); /* 'ai ' */
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}
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/**
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* Tests if it a genuine Hygon CPU based on the ASMCpuId(0) output.
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*
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* @returns true/false.
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* @param uEBX EBX return from ASMCpuId(0)
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* @param uECX ECX return from ASMCpuId(0)
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* @param uEDX EDX return from ASMCpuId(0)
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*/
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DECLINLINE(bool) RTX86IsHygonCpu(uint32_t uEBX, uint32_t uECX, uint32_t uEDX)
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{
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/* 'HygonGenuine' */
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return uEBX == UINT32_C(0x6f677948) /* Hygo */
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&& uECX == UINT32_C(0x656e6975) /* uine */
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&& uEDX == UINT32_C(0x6e65476e); /* nGen */
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}
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/**
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* Checks whether ASMCpuId_EAX(0x00000000) indicates a valid range.
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*
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*
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* @returns true/false.
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* @param uEAX The EAX value of CPUID leaf 0x00000000.
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*
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* @note This only succeeds if there are at least two leaves in the range.
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* @remarks The upper range limit is just some half reasonable value we've
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* picked out of thin air.
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*/
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DECLINLINE(bool) RTX86IsValidStdRange(uint32_t uEAX)
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{
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return uEAX >= UINT32_C(0x00000001) && uEAX <= UINT32_C(0x000fffff);
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}
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/**
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* Checks whether ASMCpuId_EAX(0x80000000) indicates a valid range.
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*
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* This only succeeds if there are at least two leaves in the range.
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*
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* @returns true/false.
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* @param uEAX The EAX value of CPUID leaf 0x80000000.
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*
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* @note This only succeeds if there are at least two leaves in the range.
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* @remarks The upper range limit is just some half reasonable value we've
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* picked out of thin air.
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*/
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DECLINLINE(bool) RTX86IsValidExtRange(uint32_t uEAX)
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{
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return uEAX >= UINT32_C(0x80000001) && uEAX <= UINT32_C(0x800fffff);
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}
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/**
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* Checks whether ASMCpuId_EAX(0x40000000) indicates a valid range.
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*
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* This only succeeds if there are at least two leaves in the range.
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*
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* @returns true/false.
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* @param uEAX The EAX value of CPUID leaf 0x40000000.
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*
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* @note Unlike RTX86IsValidStdRange() and RTX86IsValidExtRange(), a single
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* leaf is okay here. So, you always need to check the range.
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* @remarks The upper range limit is take from the intel docs.
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*/
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DECLINLINE(bool) RTX86IsValidHypervisorRange(uint32_t uEAX)
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{
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return uEAX >= UINT32_C(0x40000000) && uEAX <= UINT32_C(0x4fffffff);
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}
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/**
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* Extracts the CPU family from ASMCpuId(1) or ASMCpuId(0x80000001)
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*
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* @returns Family.
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* @param uEAX EAX return from ASMCpuId(1) or ASMCpuId(0x80000001).
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*/
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DECLINLINE(uint32_t) RTX86GetCpuFamily(uint32_t uEAX)
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{
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return ((uEAX >> 8) & 0xf) == 0xf
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? ((uEAX >> 20) & 0x7f) + 0xf
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: ((uEAX >> 8) & 0xf);
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}
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/**
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* Extracts the CPU model from ASMCpuId(1) or ASMCpuId(0x80000001), Intel variant.
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*
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* @returns Model.
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* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
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*/
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DECLINLINE(uint32_t) RTX86GetCpuModelIntel(uint32_t uEAX)
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{
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return ((uEAX >> 8) & 0xf) == 0xf || (((uEAX >> 8) & 0xf) == 0x6) /* family! */
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? ((uEAX >> 4) & 0xf) | ((uEAX >> 12) & 0xf0)
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: ((uEAX >> 4) & 0xf);
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}
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/**
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* Extracts the CPU model from ASMCpuId(1) or ASMCpuId(0x80000001), AMD variant.
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*
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* @returns Model.
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* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
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*/
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DECLINLINE(uint32_t) RTX86GetCpuModelAMD(uint32_t uEAX)
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{
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return ((uEAX >> 8) & 0xf) == 0xf
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? ((uEAX >> 4) & 0xf) | ((uEAX >> 12) & 0xf0)
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: ((uEAX >> 4) & 0xf);
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}
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/**
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* Extracts the CPU model from ASMCpuId(1) or ASMCpuId(0x80000001)
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*
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* @returns Model.
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* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
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* @param fIntel Whether it's an intel CPU. Use RTX86IsIntelCpu() or
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* RTX86IsIntelCpu().
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*/
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DECLINLINE(uint32_t) RTX86GetCpuModel(uint32_t uEAX, bool fIntel)
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{
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return ((uEAX >> 8) & 0xf) == 0xf || (((uEAX >> 8) & 0xf) == 0x6 && fIntel) /* family! */
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? ((uEAX >> 4) & 0xf) | ((uEAX >> 12) & 0xf0)
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: ((uEAX >> 4) & 0xf);
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}
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/**
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* Extracts the CPU stepping from ASMCpuId(1) or ASMCpuId(0x80000001)
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*
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* @returns Model.
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* @param uEAX EAX from ASMCpuId(1) or ASMCpuId(0x80000001).
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*/
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DECLINLINE(uint32_t) RTX86GetCpuStepping(uint32_t uEAX)
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{
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return uEAX & 0xf;
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}
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/** @} */
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#endif /* !IPRT_INCLUDED_x86_helpers_h */
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