EmulatorPkg/AutoScanPei/AutoScanPei.c

/*++ @file

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2011, Apple Inc. All rights reserved.
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 "PiPei.h"
#include <Ppi/EmuThunk.h>
#include <Ppi/MemoryDiscovered.h>

#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PeiServicesTablePointerLib.h>

EFI_STATUS
EFIAPI
PeimInitializeAutoScanPei (
  IN       EFI_PEI_FILE_HANDLE       FileHandle,
  IN CONST EFI_PEI_SERVICES          **PeiServices
  )
/*++

Routine Description:
  Perform a call-back into the SEC simulator to get a memory value

Arguments:
  FfsHeader   - General purpose data available to every PEIM
  PeiServices - General purpose services available to every PEIM.

Returns:
  None

**/
{
  EFI_STATUS                  Status;
  EFI_PEI_PPI_DESCRIPTOR      *PpiDescriptor;
  EMU_THUNK_PPI               *Thunk;
  UINT64                      MemorySize;
  EFI_PHYSICAL_ADDRESS        MemoryBase;
  UINTN                       Index;
  EFI_RESOURCE_ATTRIBUTE_TYPE Attributes;


  DEBUG ((EFI_D_ERROR, "Emu Autoscan PEIM Loaded\n"));

  //
  // Get the PEI UNIX Autoscan PPI
  //
  Status = PeiServicesLocatePpi (
             &gEmuThunkPpiGuid,      // GUID
             0,                      // INSTANCE
             &PpiDescriptor,         // EFI_PEI_PPI_DESCRIPTOR
             (VOID **)&Thunk         // PPI
             );
  ASSERT_EFI_ERROR (Status);

  Index = 0;
  do {
    Status = Thunk->MemoryAutoScan (Index, &MemoryBase, &MemorySize);
    if (!EFI_ERROR (Status)) {
      Attributes =
        (
          EFI_RESOURCE_ATTRIBUTE_PRESENT |
          EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
          EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
          EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
          EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
          EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
        );

      if (Index == 0) {
        //
        // Register the memory with the PEI Core
        //
        Status = PeiServicesInstallPeiMemory (MemoryBase, MemorySize);
        ASSERT_EFI_ERROR (Status);

        Attributes |= EFI_RESOURCE_ATTRIBUTE_TESTED;
      }

      BuildResourceDescriptorHob (
        EFI_RESOURCE_SYSTEM_MEMORY,
        Attributes,
        MemoryBase,
        MemorySize
        );
    }
    Index++;
  } while (!EFI_ERROR (Status));

  //
  // Build the CPU hob with 57-bit addressing and 16-bits of IO space.
  //
  BuildCpuHob (57, 16);

  return Status;
}