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This library provides an interface to request non-MMRAM pages to be mapped/unblocked from inside MM environment. For MM modules that need to access areas outside of MMRAMs, the agents responsible for setting up these regions must use this API to enable access to these memory areas from within MM. During the IPL, when RestrictedMemoryAccess is enabled, this unblocked memory is specifically used to create a BuildResourceHob, which allocates storage for the SMM accessible DRAM (non-MMIO) range. Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Sami Mujawar <sami.mujawar@arm.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Hongbin1 Zhang <hongbin1.zhang@intel.com> Cc: Wei6 Xu <wei6.xu@intel.com> Cc: Dun Tan <dun.tan@intel.com> Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
48 lines
1.2 KiB
INI
48 lines
1.2 KiB
INI
## @file
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# Instance of MM Unblock Page Library.
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#
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# This library provides an interface to request non-MMRAM pages to be mapped/unblocked
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# from inside MM environment.
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#
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# For MM modules that need to access regions outside of MMRAMs, the agents that set up
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# these regions are responsible for invoking this API in order for these memory areas
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# to be accessed from inside MM.
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#
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# Copyright (c) Microsoft Corporation.
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# Copyright (c) 2024, 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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#
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##
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[Defines]
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INF_VERSION = 0x0001001B
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BASE_NAME = MmUnblockMemoryLib
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FILE_GUID = CBFE5800-70FD-4D9A-AA78-DB617294077E
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MODULE_TYPE = PEIM
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VERSION_STRING = 1.0
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LIBRARY_CLASS = MmUnblockMemoryLib
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#
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# VALID_ARCHITECTURES = IA32 X64
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#
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[Sources]
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MmUnblockMemoryLib.c
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[Packages]
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UefiCpuPkg/UefiCpuPkg.dec
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MdePkg/MdePkg.dec
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[LibraryClasses]
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HobLib
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DebugLib
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BaseMemoryLib
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PeiServicesLib
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[Ppis]
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gEfiPeiMmCommunicationPpiGuid
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[Guids]
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gMmUnblockRegionHobGuid
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