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https://github.com/CloverHackyColor/CloverBootloader.git
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38 lines
905 B
NASM
38 lines
905 B
NASM
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Module Name:
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;
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; EnableCache.Asm
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;
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; Abstract:
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;
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; Flush all caches with a WBINVD instruction, clear the CD bit of CR0 to 0, and clear
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; the NW bit of CR0 to 0
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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DEFAULT REL
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SECTION .text
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; AsmEnableCache (
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; VOID
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(AsmEnableCache)
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ASM_PFX(AsmEnableCache):
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wbinvd
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mov rax, cr0
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btr rax, 29
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btr rax, 30
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mov cr0, rax
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ret
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