4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/** @file
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AsmWriteMsr64 function
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync are licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync which accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync http://opensource.org/licenses/bsd-license.php.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync**/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/**
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes a 64-bit value to a Machine Specific Register(MSR), and returns the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Writes the 64-bit value specified by Value to the MSR specified by Index. The
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync 64-bit value written to the MSR is returned. No parameter checking is
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync performed on Index or Value, and some of these may cause CPU exceptions. The
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync caller must either guarantee that Index and Value are valid, or the caller
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync must establish proper exception handlers. This function is only available on
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IA-32 and x64.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Index The 32-bit MSR index to write.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value The 64-bit value to write to the MSR.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return Value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync**/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncUINT64
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFIAPI
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncAsmWriteMsr64 (
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN UINT32 Index,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync IN UINT64 Value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync )
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync _asm {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mov edx, dword ptr [Value + 4]
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mov eax, dword ptr [Value + 0]
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mov ecx, Index
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync wrmsr
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync