AutoScanPei.c

/*++ @file
 
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2011, Apple Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
 
**/
 
#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 ((DEBUG_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;
}