mirror of https://github.com/acidanthera/audk.git
67 lines
1.8 KiB
NASM
67 lines
1.8 KiB
NASM
;; @file
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; Provide FSP helper function.
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;
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; Copyright (c) 2015, 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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.586p
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.model flat,C
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.code
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;
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; FspInfoHeaderRelativeOff is patched during build process and initialized to offset of the AsmGetFspBaseAddress
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; from the FSP Info header.
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;
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FspInfoHeaderRelativeOff PROC NEAR PUBLIC
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;
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; This value will be pached by the build script
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;
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DD 012345678h
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FspInfoHeaderRelativeOff ENDP
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;
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; Returns FSP Base Address.
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;
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; This function gets the FSP Info Header using relative addressing and returns the FSP Base from the header structure
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;
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AsmGetFspBaseAddress PROC NEAR PUBLIC
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mov eax, AsmGetFspBaseAddress
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sub eax, dword ptr [FspInfoHeaderRelativeOff]
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add eax, 01Ch
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mov eax, dword ptr [eax]
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ret
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AsmGetFspBaseAddress ENDP
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;
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; No stack counter part of AsmGetFspBaseAddress. Return address is in edi.
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;
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AsmGetFspBaseAddressNoStack PROC NEAR PUBLIC
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mov eax, AsmGetFspBaseAddress
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sub eax, dword ptr [FspInfoHeaderRelativeOff]
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add eax, 01Ch
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mov eax, dword ptr [eax]
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jmp edi
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AsmGetFspBaseAddressNoStack ENDP
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;
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; Returns FSP Info Header.
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;
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; This function gets the FSP Info Header using relative addressing and returns it
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;
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AsmGetFspInfoHeader PROC NEAR PUBLIC
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mov eax, AsmGetFspBaseAddress
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sub eax, dword ptr [FspInfoHeaderRelativeOff]
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ret
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AsmGetFspInfoHeader ENDP
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;
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; No stack counter part of AsmGetFspInfoHeader. Return address is in edi.
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;
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AsmGetFspInfoHeaderNoStack PROC NEAR PUBLIC
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mov eax, AsmGetFspBaseAddress
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sub eax, dword ptr [FspInfoHeaderRelativeOff]
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jmp edi
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AsmGetFspInfoHeaderNoStack ENDP
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END |