mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-01 12:53:27 +01:00
31 lines
594 B
C
31 lines
594 B
C
|
/** @file
|
||
|
|
AsmDisableCache function
|
||
|
|
|
||
|
|
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
/**
|
||
|
|
Set CD bit and clear NW bit of CR0 followed by a WBINVD.
|
||
|
|
|
||
|
|
Disables the caches by setting the CD bit of CR0 to 1, clearing the NW bit of CR0 to 0,
|
||
|
|
and executing a WBINVD instruction. This function is only available on IA-32 and x64.
|
||
|
|
|
||
|
|
**/
|
||
|
|
VOID
|
||
|
|
EFIAPI
|
||
|
|
AsmDisableCache (
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
{
|
||
|
|
_asm {
|
||
|
|
mov eax, cr0
|
||
|
|
bts eax, 30
|
||
|
|
btr eax, 29
|
||
|
|
mov cr0, eax
|
||
|
|
wbinvd
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|