/** @file | |
AsmEnableCache function | |
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
/** | |
Perform a WBINVD and clear both the CD and NW bits of CR0. | |
Enables the caches by executing a WBINVD instruction and then clear both the CD and NW | |
bits of CR0 to 0. This function is only available on IA-32 and x64. | |
**/ | |
VOID | |
EFIAPI | |
AsmEnableCache ( | |
VOID | |
) | |
{ | |
_asm { | |
wbinvd | |
mov eax, cr0 | |
btr eax, 30 | |
btr eax, 29 | |
mov cr0, eax | |
} | |
} |