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| author | Laszlo Ersek <lersek@redhat.com> | 2020-03-12 23:35:55 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-03-13 17:25:00 +0000 |
| commit | 799d88c1bae7978da23727df94b16f37bd1521f4 (patch) | |
| tree | 8d856c7204eef49e40eecdfbaf99dad32bd9389a /OvmfPkg/FvmainCompactScratchEnd.fdf.inc | |
| parent | 912718d8c7c783c310a34f6a2dd816c359d9624a (diff) | |
| download | edk2-799d88c1bae7978da23727df94b16f37bd1521f4.tar.gz edk2-799d88c1bae7978da23727df94b16f37bd1521f4.tar.bz2 edk2-799d88c1bae7978da23727df94b16f37bd1521f4.zip | |
OvmfPkg: give more telling names to some FDF include files
Leif suggested that FDF include files should preferably refer with their
names to the FDF file sections from which they are included.
Therefore
- rename "OvmfPkg.fdf.inc" to "OvmfPkgDefines.fdf.inc" (included from the
[Defines] section),
- rename "DecomprScratchEnd.fdf.inc" to "FvmainCompactScratchEnd.fdf.inc"
(included under the [FV.FVMAIN_COMPACT] section).
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien@xen.org>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: http://mid.mail-archive.com/20200312142006.GG23627@bivouac.eciton.net
Ref: https://edk2.groups.io/g/devel/message/55812
Suggested-by: Leif Lindholm <leif@nuviainc.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200312223555.29267-3-lersek@redhat.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
Diffstat (limited to 'OvmfPkg/FvmainCompactScratchEnd.fdf.inc')
| -rw-r--r-- | OvmfPkg/FvmainCompactScratchEnd.fdf.inc | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/OvmfPkg/FvmainCompactScratchEnd.fdf.inc b/OvmfPkg/FvmainCompactScratchEnd.fdf.inc new file mode 100644 index 0000000000..46f5258329 --- /dev/null +++ b/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)
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