StandaloneMmPkg: Make StandaloneMmCpu driver architecture independent

StandaloneMmCpu now can supports more architectures like RISC-V besides
ARM/AARCH64.

Signed-off-by: Tuan Phan <tphan@ventanamicro.com>
Reviewed-by: levi.yun <yeoreum.yun@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

StandaloneMmPkg/Include/StandaloneMmCpu.h

@@ -0,0 +1,94 @@
+/** @file
+  Private header with declarations and definitions specific to the MM Standalone
+  CPU driver
+
+  Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef MM_CPU_DRIVER_H_
+#define MM_CPU_DRIVER_H_
+
+#include <Protocol/MmCommunication2.h>
+#include <Protocol/MmConfiguration.h>
+#include <Protocol/MmCpu.h>
+#include <Guid/MpInformation.h>
+
+typedef
+EFI_STATUS
+(*PI_MM_CPU_DRIVER_ENTRYPOINT) (
+  IN UINTN  EventId,
+  IN UINTN  CpuNumber,
+  IN UINTN  NsCommBufferAddr
+  );
+
+typedef struct {
+  PI_MM_CPU_DRIVER_ENTRYPOINT    *MmCpuDriverEpPtr;
+} MM_CPU_DRIVER_EP_DESCRIPTOR;
+
+//
+// CPU driver initialization specific declarations
+//
+extern EFI_MM_SYSTEM_TABLE  *mMmst;
+
+//
+// CPU State Save protocol specific declarations
+//
+extern EFI_MM_CPU_PROTOCOL  mMmCpuState;
+
+//
+// MM event handling specific declarations
+//
+extern EFI_MM_COMMUNICATE_HEADER      **PerCpuGuidedEventContext;
+extern EFI_MMRAM_DESCRIPTOR           mNsCommBuffer;
+extern EFI_MMRAM_DESCRIPTOR           mSCommBuffer;
+extern MP_INFORMATION_HOB_DATA        *mMpInformationHobData;
+extern EFI_MM_CONFIGURATION_PROTOCOL  mMmConfig;
+
+/**
+  The PI Standalone MM entry point for the CPU driver.
+
+  @param  [in] EventId            The event Id.
+  @param  [in] CpuNumber          The CPU number.
+  @param  [in] NsCommBufferAddr   Address of the NS common buffer.
+
+  @retval   EFI_SUCCESS             Success.
+  @retval   EFI_INVALID_PARAMETER   A parameter was invalid.
+  @retval   EFI_ACCESS_DENIED       Access not permitted.
+  @retval   EFI_OUT_OF_RESOURCES    Out of resources.
+  @retval   EFI_UNSUPPORTED         Operation not supported.
+**/
+EFI_STATUS
+PiMmStandaloneMmCpuDriverEntry (
+  IN UINTN  EventId,
+  IN UINTN  CpuNumber,
+  IN UINTN  NsCommBufferAddr
+  );
+
+/**
+  This function is the main entry point for an MM handler dispatch
+  or communicate-based callback.
+
+  @param  DispatchHandle  The unique handle assigned to this handler by
+                          MmiHandlerRegister().
+  @param  Context         Points to an optional handler context which was
+                          specified when the handler was registered.
+  @param  CommBuffer      A pointer to a collection of data in memory that will
+                          be conveyed from a non-MM environment into an
+                          MM environment.
+  @param  CommBufferSize  The size of the CommBuffer.
+
+  @return Status Code
+
+**/
+EFI_STATUS
+EFIAPI
+PiMmCpuTpFwRootMmiHandler (
+  IN     EFI_HANDLE  DispatchHandle,
+  IN     CONST VOID  *Context         OPTIONAL,
+  IN OUT VOID        *CommBuffer      OPTIONAL,
+  IN OUT UINTN       *CommBufferSize  OPTIONAL
+  );
+
+#endif /* MM_CPU_DRIVER_H_ */