mirror of https://github.com/acidanthera/audk.git
43 lines
1.1 KiB
NASM
43 lines
1.1 KiB
NASM
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;-----------------------------------------------------------------------------
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;
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; Copyright (c) 2021, AMD. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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;-----------------------------------------------------------------------------
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%include "Nasm.inc"
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SECTION .text
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;-----------------------------------------------------------------------------
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; UINT32
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; EFIAPI
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; AsmPvalidate (
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; IN UINT32 PageSize
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; IN UINT32 Validate,
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; IN UINT64 Address
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; )
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;-----------------------------------------------------------------------------
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global ASM_PFX(AsmPvalidate)
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ASM_PFX(AsmPvalidate):
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mov rax, r8
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PVALIDATE
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; Save the carry flag.
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setc dl
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; The PVALIDATE instruction returns the status in rax register.
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cmp rax, 0
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jne PvalidateExit
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; Check the carry flag to determine if RMP entry was updated.
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cmp dl, 0
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je PvalidateExit
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; Return the PVALIDATE_RET_NO_RMPUPDATE.
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mov rax, 255
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PvalidateExit:
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ret
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