69f8ef04a8
Kvmtool places the base address of the CFI flash in the device tree it passes to UEFI. This library parses the kvmtool device tree to read the CFI base address and initialise the PCDs use by the NOR flash driver and the variable storage. UEFI takes ownership of the CFI flash hardware, and exposes its functionality through the UEFI Runtime Variable Service. Therefore, disable the device tree node for the CFI flash used for storing the UEFI variables, to prevent the OS from attaching its device driver as well. Signed-off-by: Sami Mujawar <sami.mujawar@arm.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
50 lines
1.4 KiB
INI
50 lines
1.4 KiB
INI
## @file
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# Nor Flash library for Kvmtool.
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#
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# Copyright (c) 2020, ARM Ltd. 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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[Defines]
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INF_VERSION = 0x0001001B
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BASE_NAME = NorFlashKvmtoolLib
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FILE_GUID = E75F07A1-B160-4893-BDD4-09E32FF847DC
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.0
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LIBRARY_CLASS = NorFlashPlatformLib
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CONSTRUCTOR = NorFlashPlatformLibConstructor
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[Sources.common]
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NorFlashKvmtool.c
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[Packages]
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ArmPkg/ArmPkg.dec
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ArmPlatformPkg/ArmPlatformPkg.dec
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ArmVirtPkg/ArmVirtPkg.dec
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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[LibraryClasses]
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BaseLib
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DebugLib
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PcdLib
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UefiBootServicesTableLib
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[Protocols]
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gFdtClientProtocolGuid ## CONSUMES
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[Pcd]
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gArmTokenSpaceGuid.PcdFvBaseAddress
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gArmTokenSpaceGuid.PcdFvSize
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gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
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gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
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gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase
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gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize
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gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
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gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
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[Depex]
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gFdtClientProtocolGuid
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