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| /** @file
| AsmWriteCr4 function
|
| Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
| SPDX-License-Identifier: BSD-2-Clause-Patent
|
| **/
|
| /**
| Writes a value to Control Register 4 (CR4).
|
| Writes and returns a new value to CR4. This function is only available on
| IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
|
| @param Value The value to write to CR4.
|
| @return The value written to CR4.
|
| **/
| UINTN
| EFIAPI
| AsmWriteCr4 (
| UINTN Value
| )
| {
| _asm {
| mov eax, Value
| _emit 0x0f // mov cr4, eax
| _emit 0x22
| _emit 0xE0
| }
| }
|
|
|
