diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/OvmfPkg/FvmainCompactScratchEnd.fdf.inc')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/OvmfPkg/FvmainCompactScratchEnd.fdf.inc | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/OvmfPkg/FvmainCompactScratchEnd.fdf.inc b/src/VBox/Devices/EFI/Firmware/OvmfPkg/FvmainCompactScratchEnd.fdf.inc new file mode 100644 index 00000000..780741f1 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/OvmfPkg/FvmainCompactScratchEnd.fdf.inc @@ -0,0 +1,65 @@ +## @file +# This FDF include file computes the end of the scratch buffer used in +# DecompressMemFvs() [OvmfPkg/Sec/SecMain.c]. It is based on the decompressed +# (ie. original) size of the LZMA-compressed section of the one FFS file in +# the FVMAIN_COMPACT firmware volume. +# +# Copyright (C) 2015, Red Hat, Inc. +# +# SPDX-License-Identifier: BSD-2-Clause-Patent +## + +# The GUID EE4E5898-3914-4259-9D6E-DC7BD79403CF means "LzmaCustomDecompress". +# The decompressed output will have the following structure (see the file +# "9E21FD93-9C72-4c15-8C4B-E77F1DB2D792SEC1.guided.dummy" in the +# Build/Ovmf*/*/FV/Ffs/9E21FD93-9C72-4c15-8C4B-E77F1DB2D792/ directory): +# +# Size Contents +# ------------------- -------------------------------------------------------- +# 4 EFI_COMMON_SECTION_HEADER, stating size 124 (0x7C) and +# type 0x19 (EFI_SECTION_RAW). The purpose of this section +# is to pad the start of PEIFV to 128 bytes. +# 120 Zero bytes (padding). +# +# 4 EFI_COMMON_SECTION_HEADER, stating size +# (PcdOvmfPeiMemFvSize + 4), and type 0x17 +# (EFI_SECTION_FIRMWARE_VOLUME_IMAGE). +# PcdOvmfPeiMemFvSize PEIFV. Note that the above sizes pad the offset of this +# object to 128 bytes. See also the "guided.dummy.txt" +# file in the same directory. +# +# 4 EFI_COMMON_SECTION_HEADER, stating size 12 (0xC) and +# type 0x19 (EFI_SECTION_RAW). The purpose of this section +# is to pad the start of DXEFV to 16 bytes. +# 8 Zero bytes (padding). +# +# 4 EFI_COMMON_SECTION_HEADER, stating size +# (PcdOvmfDxeMemFvSize + 4), and type 0x17 +# (EFI_SECTION_FIRMWARE_VOLUME_IMAGE). +# PcdOvmfDxeMemFvSize DXEFV. Note that the above sizes pad the offset of this +# object to 16 bytes. See also the "guided.dummy.txt" file +# in the same directory. +# +# The total size after decompression is (128 + PcdOvmfPeiMemFvSize + 16 + +# PcdOvmfDxeMemFvSize). + +DEFINE OUTPUT_SIZE = (128 + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvSize + 16 + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize) + +# LzmaCustomDecompressLib uses a constant scratch buffer size of 64KB; see +# SCRATCH_BUFFER_REQUEST_SIZE in +# "MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c". + +DEFINE DECOMP_SCRATCH_SIZE = 0x00010000 + +# Note: when we use PcdOvmfDxeMemFvBase in this context, BaseTools have not yet +# offset it with MEMFD's base address. For that reason we have to do it manually. +# +# The calculation below mirrors DecompressMemFvs() [OvmfPkg/Sec/SecMain.c]. + +DEFINE OUTPUT_BASE = ($(MEMFD_BASE_ADDRESS) + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase + 0x00100000) +DEFINE DECOMP_SCRATCH_BASE_UNALIGNED = ($(OUTPUT_BASE) + $(OUTPUT_SIZE)) +DEFINE DECOMP_SCRATCH_BASE_ALIGNMENT = 0x000FFFFF +DEFINE DECOMP_SCRATCH_BASE_MASK = 0xFFF00000 +DEFINE DECOMP_SCRATCH_BASE = (($(DECOMP_SCRATCH_BASE_UNALIGNED) + $(DECOMP_SCRATCH_BASE_ALIGNMENT)) & $(DECOMP_SCRATCH_BASE_MASK)) + +SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd = $(DECOMP_SCRATCH_BASE) + $(DECOMP_SCRATCH_SIZE) |