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/*********************************************************
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* Copyright (C) 2003-2009 VMware, Inc. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation version 2.1 and no later version.
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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 MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
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* License for more details.
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*********************************************************/
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/*********************************************************
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* The contents of this file are subject to the terms of the Common
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* Development and Distribution License (the "License") version 1.0
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* and no later version. You may not use this file except in
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* compliance with the License.
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* You can obtain a copy of the License at
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* http://www.opensource.org/licenses/cddl1.php
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*********************************************************/
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* CPUID-related assembly functions.
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#ifndef _X86CPUID_ASM_H_
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#define _X86CPUID_ASM_H_
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#define INCLUDE_ALLOW_USERLEVEL
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#define INCLUDE_ALLOW_VMMEXT
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#define INCLUDE_ALLOW_MODULE
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#define INCLUDE_ALLOW_VMMON
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#define INCLUDE_ALLOW_VMNIXMOD
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#define INCLUDE_ALLOW_VMK_MODULE
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#define INCLUDE_ALLOW_VMKERNEL
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#define INCLUDE_ALLOW_DISTRIBUTE
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#define INCLUDE_ALLOW_VMCORE
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#include "includeCheck.h"
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#include "vm_basic_asm.h"
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* x86-64 windows doesn't support inline asm so we have to use these
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* intrinsic functions defined in the compiler. Not all of these are well
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* documented. There is an array in the compiler dll (c1.dll) which has
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* an array of the names of all the intrinsics minus the leading
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* underscore. Searching around in the ntddk.h file can also be helpful.
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* The declarations for the intrinsic functions were taken from the DDK.
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* Our declarations must match the ddk's otherwise the 64-bit c++ compiler
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* will complain about second linkage of the intrinsic functions.
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* We define the intrinsic using the basic types corresponding to the
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* Windows typedefs. This avoids having to include windows header files
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* to get to the windows types.
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* intrinsic functions only supported by x86-64 windows as of 2k3sp1
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void __cpuid(unsigned int*, unsigned int);
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#pragma intrinsic(__cpuid)
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#endif /* VM_X86_64 */
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* Checked against the Intel manual and GCC --hpreg
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* Need __volatile__ and "memory" since CPUID has a synchronizing effect.
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* The CPUID may also change at runtime (APIC flag, etc).
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__GET_CPUID(int eax, // IN
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CPUIDRegs *regs) // OUT
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__asm__ __volatile__(
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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"movl %%ebx, %1" "\n\t"
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: "=a" (regs->eax), "=&rm" (regs->ebx), "=c" (regs->ecx), "=d" (regs->edx)
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: "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx), "=d" (regs->edx)
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__GET_CPUID2(int eax, // IN
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CPUIDRegs *regs) // OUT
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__asm__ __volatile__(
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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"movl %%ebx, %1" "\n\t"
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: "=a" (regs->eax), "=&rm" (regs->ebx), "=c" (regs->ecx), "=d" (regs->edx)
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: "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx), "=d" (regs->edx)
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: "a" (eax), "c" (ecx)
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__GET_EAX_FROM_CPUID(int eax) // IN
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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__asm__ __volatile__(
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"movl %%ebx, %1" "\n\t"
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: "=a" (eax), "=&rm" (ebx)
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: "memory", "%ecx", "%edx"
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__asm__ __volatile__(
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: "memory", "%ebx", "%ecx", "%edx"
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__GET_EBX_FROM_CPUID(int eax) // IN
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__asm__ __volatile__(
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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"movl %%ebx, %1" "\n\t"
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: "=a" (eax), "=&rm" (ebx)
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: "=a" (eax), "=b" (ebx)
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: "memory", "%ecx", "%edx"
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__GET_ECX_FROM_CPUID(int eax) // IN
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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__asm__ __volatile__(
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"movl %%ebx, %1" "\n\t"
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: "=a" (eax), "=&rm" (ebx), "=c" (ecx)
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__asm__ __volatile__(
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: "=a" (eax), "=c" (ecx)
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: "memory", "%ebx", "%edx"
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__GET_EDX_FROM_CPUID(int eax) // IN
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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__asm__ __volatile__(
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"movl %%ebx, %1" "\n\t"
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: "=a" (eax), "=&rm" (ebx), "=d" (edx)
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__asm__ __volatile__(
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: "=a" (eax), "=d" (edx)
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: "memory", "%ebx", "%ecx"
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__GET_EAX_FROM_CPUID4(int ecx) // IN
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#if defined __PIC__ && !vm_x86_64 // %ebx is reserved by the compiler.
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__asm__ __volatile__(
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"movl %%ebx, %1" "\n\t"
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: "=a" (eax), "=&rm" (ebx), "=c" (ecx)
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__asm__ __volatile__(
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: "=a" (eax), "=c" (ecx)
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: "memory", "%ebx", "%edx"
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#elif defined(_MSC_VER) // } {
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__GET_CPUID(int input, CPUIDRegs *regs)
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__cpuid((unsigned int *)regs, input);
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov 0x0[esi], eax
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__asm mov 0x4[esi], ebx
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__asm mov 0x8[esi], ecx
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__asm mov 0xC[esi], edx
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* No inline assembly in Win64. Implemented in bora/lib/user in
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__GET_CPUID2(int inputEax, int inputEcx, CPUIDRegs *regs);
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__GET_CPUID2(int inputEax, int inputEcx, CPUIDRegs *regs)
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__asm mov eax, inputEax
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__asm mov ecx, inputEcx
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov 0x0[esi], eax
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__asm mov 0x4[esi], ebx
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__asm mov 0x8[esi], ecx
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__asm mov 0xC[esi], edx
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__GET_EAX_FROM_CPUID(int input)
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__cpuid((unsigned int *)®s, input);
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov output, eax
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__GET_EBX_FROM_CPUID(int input)
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__cpuid((unsigned int *)®s, input);
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov output, ebx
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__GET_ECX_FROM_CPUID(int input)
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__cpuid((unsigned int *)®s, input);
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov output, ecx
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__GET_EDX_FROM_CPUID(int input)
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__cpuid((unsigned int *)®s, input);
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov output, edx
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* No inline assembly in Win64. Implemented in bora/lib/user in
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__GET_EAX_FROM_CPUID4(int inputEcx);
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__GET_EAX_FROM_CPUID4(int inputEcx)
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__asm mov ecx, inputEcx
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__asm _emit 0x0f __asm _emit 0xa2
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__asm mov output, eax
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#define CPUID_FOR_SIDE_EFFECTS() ((void)__GET_EAX_FROM_CPUID(0))
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__GET_CPUID4(int inputEcx, CPUIDRegs *regs)
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__GET_CPUID2(4, inputEcx, regs);
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/* The first parameter is used as an rvalue and then as an lvalue. */
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#define GET_CPUID(_ax, _bx, _cx, _dx) { \
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__GET_CPUID(_ax, ®s); \
added
removed
lib/include/x86cpuid_asm.h
