MdePkg/Library/PeiResourcePublicationLib/PeiResourcePublicationLib.c

   1 /** @file
   2   Resource Publication Library that uses PEI Core Services to publish system memory.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15
  16 //
  17 // The package level header files this module uses
  18 //
  19 #include <PiPei.h>
  20 //
  21 // The protocols, PPI and GUID defintions for this module
  22 //
  23 //
  24 // The Library classes this module consumes
  25 //
  26 #include <Library/ResourcePublicationLib.h>
  27 #include <Library/PeiServicesLib.h>
  28 #include <Library/DebugLib.h>
  29
  30
  31 /**
  32
  33   Declares the presence of permanent system memory in the platform.
  34
  35   Declares that the system memory buffer specified by MemoryBegin and MemoryLength
  36   as permanent memory that may be used for general purpose use by software.
  37   The amount of memory available to software may be less than MemoryLength
  38   if published memory has alignment restrictions.
  39
  40   @param  MemoryBegin               The start address of the memory being declared.
  41   @param  MemoryLength              The number of bytes of memory being declared.
  42
  43   @retval  RETURN_SUCCESS           The memory buffer was published.
  44   @retval  RETURN_OUT_OF_RESOURCES  There are not enough resources to publish the memory buffer
  45
  46 **/
  47 RETURN_STATUS
  48 EFIAPI
  49 PublishSystemMemory (
  50   IN PHYSICAL_ADDRESS       MemoryBegin,
  51   IN UINT64                 MemoryLength
  52   )
  53 {
  54   EFI_STATUS        Status;
  55
  56   ASSERT (MemoryLength > 0);
  57   ASSERT (MemoryLength <= (MAX_ADDRESS - MemoryBegin + 1));
  58
  59   Status      = PeiServicesInstallPeiMemory (MemoryBegin, MemoryLength);
  60
  61   return (RETURN_STATUS) Status;
  62 }
  63