Hi
I don't think this lib is generic, because it hardcode the physical address 
bits.

PhysicalAddressBits = 36;

For X86 CPU, we get it from CPUID. :-)

As enhancement, we may put most common C-code logic (such as CopyMem, or memmap 
calculation) to StandaloneMmPkg/MemLib, and only include the PhysicalAddresBit 
calculation under StandaloneMmPkg/MemLib/Arm folder.

As such, we know clearly on which one is ARM specific.

Thank you
Yao Jiewen

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Achin
> Gupta
> Sent: Monday, April 16, 2018 11:13 PM
> To: Supreeth Venkatesh <supreeth.venkat...@arm.com>
> Cc: ard.biesheu...@linaro.org; edk2-devel@lists.01.org;
> leif.lindh...@linaro.org; Yao, Jiewen <jiewen....@intel.com>; Gao, Liming
> <liming....@intel.com>; Kinney, Michael D <michael.d.kin...@intel.com>;
> n...@arm.com
> Subject: Re: [edk2] [PATCH v1 08/18] StandaloneMmPkg/MemLib: AARCH64
> Specific instance of memory check library.
> 
> Hi Supreeth,
> 
> On Fri, Apr 06, 2018 at 03:42:13PM +0100, Supreeth Venkatesh wrote:
> > MM memory check library library implementation. This library consumes
> > MM_ACCESS_PROTOCOL to get MMRAM information. In order to use this
> > library instance, the platform should produce all MMRAM range via
> > MM_ACCESS_PROTOCOL, including the range for firmware (like MM Core
> > and MM driver) and/or specific dedicated hardware.
> >
> > This patch provides services for MM Memory Operation.
> > The management mode Mem Library provides function for checking if buffer
> > is outside MMRAM and valid. It also provides functions for copy data
> > from MMRAM to non-MMRAM, from non-MMRAM to MMRAM,
> > from non-MMRAM to non-MMRAM, or set data in non-MMRAM.
> >
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Achin Gupta <achin.gu...@arm.com>
> > Signed-off-by: Supreeth Venkatesh <supreeth.venkat...@arm.com>
> > ---
> >  StandaloneMmPkg/Include/Library/MemLib.h    | 140 ++++++++++++++
> >  StandaloneMmPkg/Library/MemLib/Arm/MemLib.c | 276
> ++++++++++++++++++++++++++++
> 
> Why is this Library Arm specific. Apart from cosmetics tweaks, it has not
> changed since it was originally contributed?
> 
> cheers,
> Achin
> 
> >  StandaloneMmPkg/Library/MemLib/MemLib.inf   |  47 +++++
> >  3 files changed, 463 insertions(+)
> >  create mode 100644 StandaloneMmPkg/Include/Library/MemLib.h
> >  create mode 100644 StandaloneMmPkg/Library/MemLib/Arm/MemLib.c
> >  create mode 100644 StandaloneMmPkg/Library/MemLib/MemLib.inf
> >
> > diff --git a/StandaloneMmPkg/Include/Library/MemLib.h
> b/StandaloneMmPkg/Include/Library/MemLib.h
> > new file mode 100644
> > index 0000000000..3264f10010
> > --- /dev/null
> > +++ b/StandaloneMmPkg/Include/Library/MemLib.h
> > @@ -0,0 +1,140 @@
> > +/** @file
> > +  Provides services for MM Memory Operation.
> > +
> > +  The MM Mem Library provides function for checking if buffer is outside
> MMRAM and valid.
> > +  It also provides functions for copy data from MMRAM to non-MMRAM,
> from non-MMRAM to MMRAM,
> > +  from non-MMRAM to non-MMRAM, or set data in non-MMRAM.
> > +
> > +  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
> > +  Copyright (c) 2016 - 2017, 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 _MM_MEM_LIB_H_
> > +#define _MM_MEM_LIB_H_
> > +
> > +/**
> > +  This function check if the buffer is valid per processor architecture 
> > and not
> overlap with MMRAM.
> > +
> > +  @param Buffer  The buffer start address to be checked.
> > +  @param Length  The buffer length to be checked.
> > +
> > +  @retval TRUE  This buffer is valid per processor architecture and not
> overlap with MMRAM.
> > +  @retval FALSE This buffer is not valid per processor architecture or 
> > overlap
> with MMRAM.
> > +**/
> > +BOOLEAN
> > +EFIAPI
> > +MmIsBufferOutsideMmValid (
> > +  IN EFI_PHYSICAL_ADDRESS  Buffer,
> > +  IN UINT64                Length
> > +  );
> > +
> > +/**
> > +  Copies a source buffer (non-MMRAM) to a destination buffer (MMRAM).
> > +
> > +  This function copies a source buffer (non-MMRAM) to a destination buffer
> (MMRAM).
> > +  It checks if source buffer is valid per processor architecture and not 
> > overlap
> with MMRAM.
> > +  If the check passes, it copies memory and returns EFI_SUCCESS.
> > +  If the check fails, it return EFI_SECURITY_VIOLATION.
> > +  The implementation must be reentrant.
> > +
> > +  @param  DestinationBuffer   The pointer to the destination buffer of the
> memory copy.
> > +  @param  SourceBuffer        The pointer to the source buffer of the
> memory copy.
> > +  @param  Length              The number of bytes to copy from
> SourceBuffer to DestinationBuffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is copied.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmCopyMemToSmram (
> > +  OUT VOID       *DestinationBuffer,
> > +  IN CONST VOID  *SourceBuffer,
> > +  IN UINTN       Length
> > +  );
> > +
> > +/**
> > +  Copies a source buffer (MMRAM) to a destination buffer (NON-MMRAM).
> > +
> > +  This function copies a source buffer (non-MMRAM) to a destination buffer
> (MMRAM).
> > +  It checks if destination buffer is valid per processor architecture and 
> > not
> overlap with MMRAM.
> > +  If the check passes, it copies memory and returns EFI_SUCCESS.
> > +  If the check fails, it returns EFI_SECURITY_VIOLATION.
> > +  The implementation must be reentrant.
> > +
> > +  @param  DestinationBuffer   The pointer to the destination buffer of the
> memory copy.
> > +  @param  SourceBuffer        The pointer to the source buffer of the
> memory copy.
> > +  @param  Length              The number of bytes to copy from
> SourceBuffer to DestinationBuffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is copied.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmCopyMemFromSmram (
> > +  OUT VOID       *DestinationBuffer,
> > +  IN CONST VOID  *SourceBuffer,
> > +  IN UINTN       Length
> > +  );
> > +
> > +/**
> > +  Copies a source buffer (NON-MMRAM) to a destination buffer
> (NON-MMRAM).
> > +
> > +  This function copies a source buffer (non-MMRAM) to a destination buffer
> (MMRAM).
> > +  It checks if source buffer and destination buffer are valid per processor
> architecture and not overlap with MMRAM.
> > +  If the check passes, it copies memory and returns EFI_SUCCESS.
> > +  If the check fails, it returns EFI_SECURITY_VIOLATION.
> > +  The implementation must be reentrant, and it must handle the case where
> source buffer overlaps destination buffer.
> > +
> > +  @param  DestinationBuffer   The pointer to the destination buffer of the
> memory copy.
> > +  @param  SourceBuffer        The pointer to the source buffer of the
> memory copy.
> > +  @param  Length              The number of bytes to copy from
> SourceBuffer to DestinationBuffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is copied.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmCopyMem (
> > +  OUT VOID       *DestinationBuffer,
> > +  IN CONST VOID  *SourceBuffer,
> > +  IN UINTN       Length
> > +  );
> > +
> > +/**
> > +  Fills a target buffer (NON-MMRAM) with a byte value.
> > +
> > +  This function fills a target buffer (non-MMRAM) with a byte value.
> > +  It checks if target buffer is valid per processor architecture and not 
> > overlap
> with MMRAM.
> > +  If the check passes, it fills memory and returns EFI_SUCCESS.
> > +  If the check fails, it returns EFI_SECURITY_VIOLATION.
> > +
> > +  @param  Buffer    The memory to set.
> > +  @param  Length    The number of bytes to set.
> > +  @param  Value     The value with which to fill Length bytes of Buffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor
> architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is set.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmSetMem (
> > +  OUT VOID  *Buffer,
> > +  IN UINTN  Length,
> > +  IN UINT8  Value
> > +  );
> > +
> > +#endif
> > diff --git a/StandaloneMmPkg/Library/MemLib/Arm/MemLib.c
> b/StandaloneMmPkg/Library/MemLib/Arm/MemLib.c
> > new file mode 100644
> > index 0000000000..432a45698b
> > --- /dev/null
> > +++ b/StandaloneMmPkg/Library/MemLib/Arm/MemLib.c
> > @@ -0,0 +1,276 @@
> > +/** @file
> > +  Instance of MM memory check library.
> > +
> > +  MM memory check library library implementation. This library consumes
> MM_ACCESS_PROTOCOL
> > +  to get MMRAM information. In order to use this library instance, the
> platform should produce
> > +  all MMRAM range via MM_ACCESS_PROTOCOL, including the range for
> firmware (like MM Core
> > +  and MM driver) and/or specific dedicated hardware.
> > +
> > +  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
> > +  Copyright (c) 2016 - 2017, 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.
> > +
> > +**/
> > +
> > +
> > +#include <PiMm.h>
> > +
> > +#include <Library/BaseLib.h>
> > +#include <Library/BaseMemoryLib.h>
> > +#include <Library/DebugLib.h>
> > +
> > +EFI_MMRAM_DESCRIPTOR *mMmMemLibInternalMmramRanges;
> > +UINTN                mMmMemLibInternalMmramCount;
> > +
> > +//
> > +// Maximum support address used to check input buffer
> > +//
> > +EFI_PHYSICAL_ADDRESS  mMmMemLibInternalMaximumSupportAddress =
> 0;
> > +
> > +/**
> > +  Calculate and save the maximum support address.
> > +
> > +**/
> > +VOID
> > +MmMemLibInternalCalculateMaximumSupportAddress (
> > +  VOID
> > +  )
> > +{
> > +  UINT8        PhysicalAddressBits;
> > +
> > +  PhysicalAddressBits = 36;
> > +
> > +  //
> > +  // Save the maximum support address in one global variable
> > +  //
> > +  mMmMemLibInternalMaximumSupportAddress =
> (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);
> > +  DEBUG ((DEBUG_INFO, "mMmMemLibInternalMaximumSupportAddress =
> 0x%lx\n", mMmMemLibInternalMaximumSupportAddress));
> > +}
> > +
> > +/**
> > +  This function check if the buffer is valid per processor architecture 
> > and not
> overlap with MMRAM.
> > +
> > +  @param Buffer  The buffer start address to be checked.
> > +  @param Length  The buffer length to be checked.
> > +
> > +  @retval TRUE  This buffer is valid per processor architecture and not
> overlap with MMRAM.
> > +  @retval FALSE This buffer is not valid per processor architecture or 
> > overlap
> with MMRAM.
> > +**/
> > +BOOLEAN
> > +EFIAPI
> > +MmIsBufferOutsideMmValid (
> > +  IN EFI_PHYSICAL_ADDRESS  Buffer,
> > +  IN UINT64                Length
> > +  )
> > +{
> > +  UINTN  Index;
> > +
> > +  //
> > +  // Check override.
> > +  // NOTE: (B:0->L:4G) is invalid for IA32, but 
> > (B:1->L:4G-1)/(B:4G-1->L:1) is
> valid.
> > +  //
> > +  if ((Length > mMmMemLibInternalMaximumSupportAddress) ||
> > +      (Buffer > mMmMemLibInternalMaximumSupportAddress) ||
> > +      ((Length != 0) && (Buffer >
> (mMmMemLibInternalMaximumSupportAddress - (Length - 1)))) ) {
> > +    //
> > +    // Overflow happen
> > +    //
> > +    DEBUG ((
> > +      DEBUG_ERROR,
> > +      "MmIsBufferOutsideMmValid: Overflow: Buffer (0x%lx) - Length
> (0x%lx), MaximumSupportAddress (0x%lx)\n",
> > +      Buffer,
> > +      Length,
> > +      mMmMemLibInternalMaximumSupportAddress
> > +      ));
> > +    return FALSE;
> > +  }
> > +
> > +  for (Index = 0; Index < mMmMemLibInternalMmramCount; Index ++) {
> > +    if (((Buffer >= mMmMemLibInternalMmramRanges[Index].CpuStart) &&
> (Buffer < mMmMemLibInternalMmramRanges[Index].CpuStart +
> mMmMemLibInternalMmramRanges[Index].PhysicalSize)) ||
> > +        ((mMmMemLibInternalMmramRanges[Index].CpuStart >= Buffer)
> && (mMmMemLibInternalMmramRanges[Index].CpuStart < Buffer + Length))) {
> > +      DEBUG ((
> > +        DEBUG_ERROR,
> > +        "MmIsBufferOutsideMmValid: Overlap: Buffer (0x%lx) - Length
> (0x%lx), ",
> > +        Buffer,
> > +        Length
> > +        ));
> > +      DEBUG ((
> > +        DEBUG_ERROR,
> > +        "CpuStart (0x%lx) - PhysicalSize (0x%lx)\n",
> > +        mMmMemLibInternalMmramRanges[Index].CpuStart,
> > +        mMmMemLibInternalMmramRanges[Index].PhysicalSize
> > +        ));
> > +      return FALSE;
> > +    }
> > +  }
> > +
> > +  return TRUE;
> > +}
> > +
> > +/**
> > +  Copies a source buffer (non-MMRAM) to a destination buffer (MMRAM).
> > +
> > +  This function copies a source buffer (non-MMRAM) to a destination buffer
> (MMRAM).
> > +  It checks if source buffer is valid per processor architecture and not 
> > overlap
> with MMRAM.
> > +  If the check passes, it copies memory and returns EFI_SUCCESS.
> > +  If the check fails, it return EFI_SECURITY_VIOLATION.
> > +  The implementation must be reentrant.
> > +
> > +  @param  DestinationBuffer   The pointer to the destination buffer of the
> memory copy.
> > +  @param  SourceBuffer        The pointer to the source buffer of the
> memory copy.
> > +  @param  Length              The number of bytes to copy from
> SourceBuffer to DestinationBuffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is copied.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmCopyMemToMmram (
> > +  OUT VOID       *DestinationBuffer,
> > +  IN CONST VOID  *SourceBuffer,
> > +  IN UINTN       Length
> > +  )
> > +{
> > +  if (!MmIsBufferOutsideMmValid
> ((EFI_PHYSICAL_ADDRESS)(UINTN)SourceBuffer, Length)) {
> > +    DEBUG ((DEBUG_ERROR, "MmCopyMemToMmram: Security Violation:
> Source (0x%x), Length (0x%x)\n", SourceBuffer, Length));
> > +    return EFI_SECURITY_VIOLATION;
> > +  }
> > +  CopyMem (DestinationBuffer, SourceBuffer, Length);
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  Copies a source buffer (MMRAM) to a destination buffer (NON-MMRAM).
> > +
> > +  This function copies a source buffer (non-MMRAM) to a destination buffer
> (MMRAM).
> > +  It checks if destination buffer is valid per processor architecture and 
> > not
> overlap with MMRAM.
> > +  If the check passes, it copies memory and returns EFI_SUCCESS.
> > +  If the check fails, it returns EFI_SECURITY_VIOLATION.
> > +  The implementation must be reentrant.
> > +
> > +  @param  DestinationBuffer   The pointer to the destination buffer of the
> memory copy.
> > +  @param  SourceBuffer        The pointer to the source buffer of the
> memory copy.
> > +  @param  Length              The number of bytes to copy from
> SourceBuffer to DestinationBuffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is copied.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmCopyMemFromMmram (
> > +  OUT VOID       *DestinationBuffer,
> > +  IN CONST VOID  *SourceBuffer,
> > +  IN UINTN       Length
> > +  )
> > +{
> > +  if (!MmIsBufferOutsideMmValid
> ((EFI_PHYSICAL_ADDRESS)(UINTN)DestinationBuffer, Length)) {
> > +    DEBUG ((DEBUG_ERROR, "MmCopyMemFromMmram: Security
> Violation: Destination (0x%x), Length (0x%x)\n", DestinationBuffer, Length));
> > +    return EFI_SECURITY_VIOLATION;
> > +  }
> > +  CopyMem (DestinationBuffer, SourceBuffer, Length);
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  Copies a source buffer (NON-MMRAM) to a destination buffer
> (NON-MMRAM).
> > +
> > +  This function copies a source buffer (non-MMRAM) to a destination buffer
> (MMRAM).
> > +  It checks if source buffer and destination buffer are valid per processor
> architecture and not overlap with MMRAM.
> > +  If the check passes, it copies memory and returns EFI_SUCCESS.
> > +  If the check fails, it returns EFI_SECURITY_VIOLATION.
> > +  The implementation must be reentrant, and it must handle the case where
> source buffer overlaps destination buffer.
> > +
> > +  @param  DestinationBuffer   The pointer to the destination buffer of the
> memory copy.
> > +  @param  SourceBuffer        The pointer to the source buffer of the
> memory copy.
> > +  @param  Length              The number of bytes to copy from
> SourceBuffer to DestinationBuffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The DesinationBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SECURITY_VIOLATION The SourceBuffer is invalid per
> processor architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is copied.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmCopyMem (
> > +  OUT VOID       *DestinationBuffer,
> > +  IN CONST VOID  *SourceBuffer,
> > +  IN UINTN       Length
> > +  )
> > +{
> > +  if (!MmIsBufferOutsideMmValid
> ((EFI_PHYSICAL_ADDRESS)(UINTN)DestinationBuffer, Length)) {
> > +    DEBUG ((DEBUG_ERROR, "MmCopyMem: Security Violation: Destination
> (0x%x), Length (0x%x)\n", DestinationBuffer, Length));
> > +    return EFI_SECURITY_VIOLATION;
> > +  }
> > +  if (!MmIsBufferOutsideMmValid
> ((EFI_PHYSICAL_ADDRESS)(UINTN)SourceBuffer, Length)) {
> > +    DEBUG ((DEBUG_ERROR, "MmCopyMem: Security Violation: Source
> (0x%x), Length (0x%x)\n", SourceBuffer, Length));
> > +    return EFI_SECURITY_VIOLATION;
> > +  }
> > +  CopyMem (DestinationBuffer, SourceBuffer, Length);
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  Fills a target buffer (NON-MMRAM) with a byte value.
> > +
> > +  This function fills a target buffer (non-MMRAM) with a byte value.
> > +  It checks if target buffer is valid per processor architecture and not 
> > overlap
> with MMRAM.
> > +  If the check passes, it fills memory and returns EFI_SUCCESS.
> > +  If the check fails, it returns EFI_SECURITY_VIOLATION.
> > +
> > +  @param  Buffer    The memory to set.
> > +  @param  Length    The number of bytes to set.
> > +  @param  Value     The value with which to fill Length bytes of Buffer.
> > +
> > +  @retval EFI_SECURITY_VIOLATION The Buffer is invalid per processor
> architecture or overlap with MMRAM.
> > +  @retval EFI_SUCCESS            Memory is set.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MmSetMem (
> > +  OUT VOID  *Buffer,
> > +  IN UINTN  Length,
> > +  IN UINT8  Value
> > +  )
> > +{
> > +  if (!MmIsBufferOutsideMmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)Buffer,
> Length)) {
> > +    DEBUG ((DEBUG_ERROR, "MmSetMem: Security Violation: Source
> (0x%x), Length (0x%x)\n", Buffer, Length));
> > +    return EFI_SECURITY_VIOLATION;
> > +  }
> > +  SetMem (Buffer, Length, Value);
> > +  return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > +  The constructor function initializes the Mm Mem library
> > +
> > +  @param  ImageHandle   The firmware allocated handle for the EFI
> image.
> > +  @param  SystemTable   A pointer to the EFI System Table.
> > +
> > +  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
> > +
> > +**/
> > +EFI_STATUS
> > +EFIAPI
> > +MemLibConstructor (
> > +  IN EFI_HANDLE             ImageHandle,
> > +  IN EFI_MM_SYSTEM_TABLE    *MmSystemTable
> > +  )
> > +{
> > +
> > +  //
> > +  // Calculate and save maximum support address
> > +  //
> > +  MmMemLibInternalCalculateMaximumSupportAddress ();
> > +
> > +  return EFI_SUCCESS;
> > +}
> > diff --git a/StandaloneMmPkg/Library/MemLib/MemLib.inf
> b/StandaloneMmPkg/Library/MemLib/MemLib.inf
> > new file mode 100644
> > index 0000000000..52b7c06397
> > --- /dev/null
> > +++ b/StandaloneMmPkg/Library/MemLib/MemLib.inf
> > @@ -0,0 +1,47 @@
> > +## @file
> > +#  Instance of MM memory check library.
> > +#
> > +#  MM memory check library library implementation. This library consumes
> MM_ACCESS_PROTOCOL
> > +#  to get MMRAM information. In order to use this library instance, the
> platform should produce
> > +#  all MMRAM range via MM_ACCESS_PROTOCOL, including the range for
> firmware (like MM Core
> > +#  and MM driver) and/or specific dedicated hardware.
> > +#
> > +#  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
> > +#  Copyright (c) 2016 - 2017, 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.
> > +#
> > +##
> > +
> > +[Defines]
> > +  INF_VERSION                    = 0x0001001A
> > +  BASE_NAME                      = MemLib
> > +  FILE_GUID                      =
> EA355F14-6409-4716-829F-37B3BC7C7F26
> > +  MODULE_TYPE                    = MM_STANDALONE
> > +  VERSION_STRING                 = 1.0
> > +  PI_SPECIFICATION_VERSION       = 0x00010032
> > +  LIBRARY_CLASS                  = MemLib|MM_STANDALONE
> MM_CORE_STANDALONE
> > +  CONSTRUCTOR                    = MemLibConstructor
> > +
> > +#
> > +# The following information is for reference only and not required by the
> build tools.
> > +#
> > +#  VALID_ARCHITECTURES           = AARCH64
> > +#
> > +
> > +[Sources.AARCH64]
> > +  Arm/MemLib.c
> > +
> > +[Packages]
> > +  MdePkg/MdePkg.dec
> > +  StandaloneMmPkg/StandaloneMmPkg.dec
> > +
> > +[LibraryClasses]
> > +  BaseMemoryLib
> > +  DebugLib
> > --
> > 2.16.2
> >
> _______________________________________________
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