7cda5d9e3a
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3168 This interface provides an abstration layer to allow MM modules to access requested areas that are outside of MMRAM. On MM model that blocks all non-MMRAM accesses, areas requested through this API will be mapped or unblocked for accessibility inside MM environment. For MM modules that need to access regions outside of MMRAMs, the agents that set up these regions are responsible for invoking this API in order for these memory areas to be accessible from inside MM. Example usages: 1. To enable runtime cache feature for variable service, Variable MM module will need to access the allocated runtime buffer. Thus the agent sets up these buffers, VariableSmmRuntimeDxe, will need to invoke this API to make these regions accessible by Variable MM. 2. For TPM ACPI table to communicate to physical presence handler, the corresponding NVS region has to be accessible from inside MM. Once the NVS region are assigned, it needs to be unblocked thourgh this API. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Cc: Hao A Wu <hao.a.wu@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Kun Qin <kun.q@outlook.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> Message-Id: <MWHPR06MB31028AF0D0785B93E4E7CF63F3969@MWHPR06MB3102.namprd06.prod.outlook.com>
35 lines
1018 B
INI
35 lines
1018 B
INI
## @file
|
|
# Null instance of MM Unblock Page Library.
|
|
#
|
|
# 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 regions outside of MMRAMs, the agents that set up
|
|
# these regions are responsible for invoking this API in order for these memory areas
|
|
# to be accessed from inside MM.
|
|
#
|
|
# Copyright (c) Microsoft Corporation.
|
|
# SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
#
|
|
#
|
|
##
|
|
|
|
[Defines]
|
|
INF_VERSION = 0x0001001B
|
|
BASE_NAME = MmUnblockMemoryLibNull
|
|
MODULE_UNI_FILE = MmUnblockMemoryLibNull.uni
|
|
FILE_GUID = 9E890F68-5C95-4C31-95DD-59E6286F85EA
|
|
MODULE_TYPE = BASE
|
|
VERSION_STRING = 1.0
|
|
LIBRARY_CLASS = MmUnblockMemoryLib
|
|
|
|
#
|
|
# VALID_ARCHITECTURES = IA32 X64
|
|
#
|
|
|
|
[Sources]
|
|
MmUnblockMemoryLibNull.c
|
|
|
|
[Packages]
|
|
MdePkg/MdePkg.dec
|