mirror of
https://git.proxmox.com/git/mirror_edk2
synced 2025-10-31 14:46:12 +00:00
e4a34497b4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10593 6f19259b-4bc3-4df7-8a09-765794883524
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/** @file
|
|
AsmMwait function
|
|
|
|
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php.
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
/**
|
|
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
|
|
}
|
|
}
|
|
|