mirror of https://github.com/acidanthera/audk.git
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/** @file
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Internal ARCH Specific file of MM memory check library.
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MM memory check library implementation. This library consumes MM_ACCESS_PROTOCOL
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to get MMRAM information. In order to use this library instance, the platform should produce
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all MMRAM range via MM_ACCESS_PROTOCOL, including the range for firmware (like MM Core
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and MM driver) and/or specific dedicated hardware.
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Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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//
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// Maximum support address used to check input buffer
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//
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extern EFI_PHYSICAL_ADDRESS mMmMemLibInternalMaximumSupportAddress;
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/**
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Calculate and save the maximum support address.
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**/
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VOID
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MmMemLibInternalCalculateMaximumSupportAddress (
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VOID
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)
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{
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UINT8 PhysicalAddressBits;
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PhysicalAddressBits = 36;
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//
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// Save the maximum support address in one global variable
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//
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mMmMemLibInternalMaximumSupportAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, PhysicalAddressBits) - 1);
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DEBUG ((DEBUG_INFO, "mMmMemLibInternalMaximumSupportAddress = 0x%lx\n", mMmMemLibInternalMaximumSupportAddress));
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}
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