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/** @file
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2016 HP Development Company, L.P.
Copyright (c) 2016 - 2024, Arm Limited. All rights reserved.
Copyright (c) 2023, Ventana Micro System Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Base.h>
#include <Pi/PiMmCis.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/HobLib.h>
#include <Protocol/DebugSupport.h> // for EFI_SYSTEM_CONTEXT
#include <Guid/ZeroGuid.h>
#include <Guid/MmramMemoryReserve.h>
#include <StandaloneMmCpu.h>
//
// mPiMmCpuDriverEpProtocol for Cpu driver entry point to handle
// mm communication event.
//
extern EDKII_PI_MM_CPU_DRIVER_EP_PROTOCOL mPiMmCpuDriverEpProtocol;
//
// Private copy of the MM system table for future use
//
EFI_MM_SYSTEM_TABLE *mMmst = NULL;
//
// Globals used to initialize the protocol
//
STATIC EFI_HANDLE mMmCpuHandle = NULL;
/** Entry point for the Standalone MM CPU driver.
@param [in] ImageHandle Unused. Not actual image handle.
@param [in] SystemTable Pointer to MM System table.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Out of resources.
@retval EFI_NOT_FOUND Failed to find the HOB for the CPU
driver endpoint descriptor.
**/
EFI_STATUS
StandaloneMmCpuInitialize (
IN EFI_HANDLE ImageHandle, // not actual imagehandle
IN EFI_MM_SYSTEM_TABLE *SystemTable // not actual systemtable
)
{
EFI_STATUS Status;
EFI_HANDLE DispatchHandle;
ASSERT (SystemTable != NULL);
mMmst = SystemTable;
// publish the MM config protocol so the MM core can register its entry point
Status = mMmst->MmInstallProtocolInterface (
&mMmCpuHandle,
&gEfiMmConfigurationProtocolGuid,
EFI_NATIVE_INTERFACE,
&mMmConfig
);
if (EFI_ERROR (Status)) {
return Status;
}
// Install entry point of this CPU driver to allow
// the entry point driver to be invoked upon receipt of an event in
// DelegatedEventLoop.
Status = mMmst->MmInstallProtocolInterface (
&mMmCpuHandle,
&gEdkiiPiMmCpuDriverEpProtocolGuid,
EFI_NATIVE_INTERFACE,
&mPiMmCpuDriverEpProtocol
);
if (EFI_ERROR (Status)) {
return Status;
}
// register the root MMI handler
Status = mMmst->MmiHandlerRegister (
PiMmCpuTpFwRootMmiHandler,
NULL,
&DispatchHandle
);
if (EFI_ERROR (Status)) {
return Status;
}
return Status;
}
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