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| /** @file
| AsmMwait function
|
| Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
| SPDX-License-Identifier: BSD-2-Clause-Patent
|
| **/
|
| /**
| Executes an MWAIT instruction.
|
| Executes an MWAIT instruction with the register state specified by Eax and
| Ecx. Returns Eax. This function is only available on IA-32 and x64.
|
| @param RegisterEax The value to load into EAX or RAX before executing the MONITOR
| instruction.
| @param RegisterEcx The value to load into ECX or RCX before executing the MONITOR
| instruction.
|
| @return RegisterEax
|
| **/
| UINTN
| EFIAPI
| AsmMwait (
| IN UINTN RegisterEax,
| IN UINTN RegisterEcx
| )
| {
| _asm {
| mov eax, RegisterEax
| mov ecx, RegisterEcx
| _emit 0x0f // mwait
| _emit 0x01
| _emit 0xC9
| }
| }
|
|
|
