Nt32Pkg/WinNtAutoScanPei/WinNtAutoScan.c

   1 /**@file
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13   WinNtAutoscan.c
  14
  15 Abstract:
  16   This PEIM to abstract memory auto-scan in a Windows NT environment.
  17
  18 Revision History
  19
  20 **/
  21
  22 //
  23 // The package level header files this module uses
  24 //
  25 #include <PiPei.h>
  26 #include <WinNtPeim.h>
  27 //
  28 // The protocols, PPI and GUID defintions for this module
  29 //
  30 #include <Ppi/NtAutoscan.h>
  31 //
  32 // The Library classes this module consumes
  33 //
  34 #include <Library/DebugLib.h>
  35 #include <Library/PeimEntryPoint.h>
  36 #include <Library/HobLib.h>
  37 #include <Library/PeiServicesLib.h>
  38
  39 EFI_STATUS
  40 EFIAPI
  41 PeimInitializeWinNtAutoScan (
  42   IN       EFI_PEI_FILE_HANDLE       FileHandle,
  43   IN CONST EFI_PEI_SERVICES          **PeiServices
  44   )
  45 /*++
  46
  47 Routine Description:
  48   Perform a call-back into the SEC simulator to get a memory value
  49
  50 Arguments:
  51   FfsHeader   - General purpose data available to every PEIM
  52   PeiServices - General purpose services available to every PEIM.
  53
  54 Returns:
  55   None
  56
  57 --*/
  58 {
  59   EFI_STATUS                  Status;
  60   EFI_PEI_PPI_DESCRIPTOR      *PpiDescriptor;
  61   PEI_NT_AUTOSCAN_PPI         *PeiNtService;
  62   UINT64                      MemorySize;
  63   EFI_PHYSICAL_ADDRESS        MemoryBase;
  64   UINTN                       Index;
  65   EFI_RESOURCE_ATTRIBUTE_TYPE Attributes;
  66
  67
  68   DEBUG ((EFI_D_ERROR, "NT 32 Autoscan PEIM Loaded\n"));
  69
  70   //
  71   // Get the PEI NT Autoscan PPI
  72   //
  73   Status = PeiServicesLocatePpi (
  74              &gPeiNtAutoScanPpiGuid, // GUID
  75              0,                      // INSTANCE
  76              &PpiDescriptor,         // EFI_PEI_PPI_DESCRIPTOR
  77              (VOID**)&PeiNtService           // PPI
  78              );
  79   ASSERT_EFI_ERROR (Status);
  80
  81   Index = 0;
  82   do {
  83     Status = PeiNtService->NtAutoScan (Index, &MemoryBase, &MemorySize);
  84     if (!EFI_ERROR (Status)) {
  85       Attributes =
  86         (
  87           EFI_RESOURCE_ATTRIBUTE_PRESENT |
  88           EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
  89           EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
  90           EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
  91           EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
  92           EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
  93         );
  94
  95       if (Index == 0) {
  96         //
  97         // Register the memory with the PEI Core
  98         //
  99         Status = PeiServicesInstallPeiMemory (MemoryBase, MemorySize);
 100         ASSERT_EFI_ERROR (Status);
 101
 102         Attributes |= EFI_RESOURCE_ATTRIBUTE_TESTED;
 103       }
 104
 105       BuildResourceDescriptorHob (
 106         EFI_RESOURCE_SYSTEM_MEMORY,
 107         Attributes,
 108         MemoryBase,
 109         MemorySize
 110         );
 111     }
 112     Index++;
 113   } while (!EFI_ERROR (Status));
 114
 115   //
 116   // Build the CPU hob with 36-bit addressing and 16-bits of IO space.
 117   //
 118   BuildCpuHob (36, 16);
 119
 120   return Status;
 121 }