mirror of https://github.com/acidanthera/audk.git
73 lines
3.7 KiB
PHP
73 lines
3.7 KiB
PHP
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## @file
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# This FDF include file computes the end of the scratch buffer used in
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# DecompressMemFvs() [OvmfPkg/Sec/SecMain.c]. It is based on the decompressed
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# (ie. original) size of the LZMA-compressed section of the one FFS file in
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# the FVMAIN_COMPACT firmware volume.
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#
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# Copyright (C) 2015, Red Hat, Inc.
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#
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# This program and the accompanying materials are licensed and made available
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# under the terms and conditions of the BSD License which accompanies this
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# distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
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# IMPLIED.
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##
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# The GUID EE4E5898-3914-4259-9D6E-DC7BD79403CF means "LzmaCustomDecompress".
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# The decompressed output will have the following structure (see the file
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# "9E21FD93-9C72-4c15-8C4B-E77F1DB2D792SEC1.guided.dummy" in the
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# Build/Ovmf*/*/FV/Ffs/9E21FD93-9C72-4c15-8C4B-E77F1DB2D792/ directory):
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#
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# Size Contents
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# ------------------- --------------------------------------------------------
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# 4 EFI_COMMON_SECTION_HEADER, stating size 124 (0x7C) and
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# type 0x19 (EFI_SECTION_RAW). The purpose of this section
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# is to pad the start of PEIFV to 128 bytes.
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# 120 Zero bytes (padding).
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#
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# 4 EFI_COMMON_SECTION_HEADER, stating size
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# (PcdOvmfPeiMemFvSize + 4), and type 0x17
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# (EFI_SECTION_FIRMWARE_VOLUME_IMAGE).
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# PcdOvmfPeiMemFvSize PEIFV. Note that the above sizes pad the offset of this
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# object to 128 bytes. See also the "guided.dummy.txt"
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# file in the same directory.
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#
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# 4 EFI_COMMON_SECTION_HEADER, stating size 12 (0xC) and
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# type 0x19 (EFI_SECTION_RAW). The purpose of this section
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# is to pad the start of DXEFV to 16 bytes.
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# 8 Zero bytes (padding).
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#
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# 4 EFI_COMMON_SECTION_HEADER, stating size
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# (PcdOvmfDxeMemFvSize + 4), and type 0x17
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# (EFI_SECTION_FIRMWARE_VOLUME_IMAGE).
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# PcdOvmfDxeMemFvSize DXEFV. Note that the above sizes pad the offset of this
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# object to 16 bytes. See also the "guided.dummy.txt" file
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# in the same directory.
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#
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# The total size after decompression is (128 + PcdOvmfPeiMemFvSize + 16 +
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# PcdOvmfDxeMemFvSize).
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DEFINE OUTPUT_SIZE = (128 + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvSize + 16 + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize)
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# LzmaCustomDecompressLib uses a constant scratch buffer size of 64KB; see
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# SCRATCH_BUFFER_REQUEST_SIZE in
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# "MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c".
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DEFINE DECOMP_SCRATCH_SIZE = 0x00010000
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# Note: when we use PcdOvmfDxeMemFvBase in this context, BaseTools have not yet
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# offset it with MEMFD's base address. For that reason we have to do it manually.
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#
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# The calculation below mirrors DecompressMemFvs() [OvmfPkg/Sec/SecMain.c].
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DEFINE OUTPUT_BASE = ($(MEMFD_BASE_ADDRESS) + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase + 0x00100000)
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DEFINE DECOMP_SCRATCH_BASE_UNALIGNED = ($(OUTPUT_BASE) + $(OUTPUT_SIZE))
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DEFINE DECOMP_SCRATCH_BASE_ALIGNMENT = 0x000FFFFF
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DEFINE DECOMP_SCRATCH_BASE_MASK = 0xFFF00000
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DEFINE DECOMP_SCRATCH_BASE = (($(DECOMP_SCRATCH_BASE_UNALIGNED) + $(DECOMP_SCRATCH_BASE_ALIGNMENT)) & $(DECOMP_SCRATCH_BASE_MASK))
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SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd = $(DECOMP_SCRATCH_BASE) + $(DECOMP_SCRATCH_SIZE)
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