audk/StandaloneMmPkg/Include/Library/StandaloneMmCoreEntryPoint.h

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StandaloneMmPkg/Core: Implementation of Standalone MM Core Module. Management Mode (MM) is a generic term used to describe a secure execution environment provided by the CPU and related silicon that is entered when the CPU detects a MMI. For x86 systems, this can be implemented with System Management Mode (SMM). For ARM systems, this can be implemented with TrustZone (TZ). A MMI can be a CPU instruction or interrupt. Upon detection of a MMI, a CPU will jump to the MM Entry Point and save some portion of its state (the "save state") such that execution can be resumed. The MMI can be generated synchronously by software or asynchronously by a hardware event. Each MMI source can be detected, cleared and disabled. Some systems provide for special memory (Management Mode RAM or MMRAM) which is set aside for software running in MM. Usually the MMRAM is hidden during normal CPU execution, but this is not required. Usually, after MMRAM is hidden it cannot be exposed until the next system reset. The MM Core Interface Specification describes three pieces of the PI Management Mode architecture: 1. MM Dispatch During DXE, the DXE Foundation works with the MM Foundation to schedule MM drivers for execution in the discovered firmware volumes. 2. MM Initialization MM related code opens MMRAM, creates the MMRAM memory map, and launches the MM Foundation, which provides the necessary services to launch MM-related drivers. Then, sometime before boot, MMRAM is closed and locked. This piece may be completed during the SEC, PEI or DXE phases. 3. MMI Management When an MMI generated, the MM environment is created and then the MMI sources are detected and MMI handlers called. This patch implements the MM Core. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Sughosh Ganu <sughosh.ganu@arm.com> Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
2018-07-13 17:05:27 +02:00
/** @file
Module entry point library for STANDALONE MM core.
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __MODULE_ENTRY_POINT_H__
#define __MODULE_ENTRY_POINT_H__
///
/// Global variable that contains a pointer to the Hob List passed into the STANDALONE MM Core entry point.
///
extern VOID *gHobList;
/**
The entry point of PE/COFF Image for the STANDALONE MM Core.
This function is the entry point for the STANDALONE MM Core. This function is required to call
ProcessModuleEntryPointList() and ProcessModuleEntryPointList() is never expected to return.
The STANDALONE MM Core is responsible for calling ProcessLibraryConstructorList() as soon as the EFI
System Table and the image handle for the STANDALONE MM Core itself have been established.
If ProcessModuleEntryPointList() returns, then ASSERT() and halt the system.
@param HobStart Pointer to the beginning of the HOB List passed in from the PEI Phase.
**/
VOID
EFIAPI
_ModuleEntryPoint (
IN VOID *HobStart
);
/**
Required by the EBC compiler and identical in functionality to _ModuleEntryPoint().
This function is required to call _ModuleEntryPoint() passing in HobStart.
@param HobStart Pointer to the beginning of the HOB List passed in from the PEI Phase.
**/
VOID
EFIAPI
EfiMain (
IN VOID *HobStart
);
/**
Auto generated function that calls the library constructors for all of the module's dependent libraries.
This function must be called by _ModuleEntryPoint().
This function calls the set of library constructors for the set of library instances
that a module depends on. This includes library instances that a module depends on
directly and library instances that a module depends on indirectly through other
libraries. This function is auto generated by build tools and those build tools are
responsible for collecting the set of library instances, determine which ones have
constructors, and calling the library constructors in the proper order based upon
each of the library instances own dependencies.
@param ImageHandle The image handle of the STANDALONE MM Core.
@param SystemTable A pointer to the EFI System Table.
**/
VOID
EFIAPI
ProcessLibraryConstructorList (
IN EFI_HANDLE ImageHandle,
IN EFI_MM_SYSTEM_TABLE *MmSystemTable
);
/**
Autogenerated function that calls a set of module entry points.
This function must be called by _ModuleEntryPoint().
This function calls the set of module entry points.
This function is auto generated by build tools and those build tools are responsible
for collecting the module entry points and calling them in a specified order.
@param HobStart Pointer to the beginning of the HOB List passed in from the PEI Phase.
**/
VOID
EFIAPI
ProcessModuleEntryPointList (
IN VOID *HobStart
);
#endif