system76-edk2/OvmfPkg/PlatformPei/Platform.c

/**@file
  Platform PEI driver

  Copyright (c) 2006 - 2009, Intel Corporation
  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.

**/

//
// The package level header files this module uses
//
#include <PiPei.h>

//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/IoLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/PciLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/ResourcePublicationLib.h>
#include <Guid/MemoryTypeInformation.h>

#include "Platform.h"

EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = {
  { EfiACPIMemoryNVS,       0x004 },
  { EfiACPIReclaimMemory,   0x01C },
  { EfiRuntimeServicesData, 0x050 },
  { EfiRuntimeServicesCode, 0x020 },
  { EfiBootServicesCode,    0x0F0 },
  { EfiBootServicesData,    0xA00 },
  { EfiMaxMemoryType,       0x000 }
};


VOID
AddIoMemoryBaseSizeHob (
  EFI_PHYSICAL_ADDRESS        MemoryBase,
  UINT64                      MemorySize
  )
{
  STATIC EFI_RESOURCE_ATTRIBUTE_TYPE Attributes =
    (
      EFI_RESOURCE_ATTRIBUTE_PRESENT     |
      EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
      EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
      EFI_RESOURCE_ATTRIBUTE_TESTED
    );

  BuildResourceDescriptorHob (
    EFI_RESOURCE_MEMORY_MAPPED_IO,
    Attributes,
    MemoryBase,
    MemorySize
    );
}


VOID
AddIoMemoryRangeHob (
  EFI_PHYSICAL_ADDRESS        MemoryBase,
  EFI_PHYSICAL_ADDRESS        MemoryLimit
  )
{
  AddIoMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
}


VOID
AddMemoryBaseSizeHob (
  EFI_PHYSICAL_ADDRESS        MemoryBase,
  UINT64                      MemorySize
  )
{
  STATIC EFI_RESOURCE_ATTRIBUTE_TYPE 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 |
      EFI_RESOURCE_ATTRIBUTE_TESTED
    );

  BuildResourceDescriptorHob (
    EFI_RESOURCE_SYSTEM_MEMORY,
    Attributes,
    MemoryBase,
    MemorySize
    );
}


VOID
AddMemoryRangeHob (
  EFI_PHYSICAL_ADDRESS        MemoryBase,
  EFI_PHYSICAL_ADDRESS        MemoryLimit
  )
{
  AddMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
}


VOID
MemMapInitialization (
  )
{
  //
  // Create Memory Type Information HOB
  //
  BuildGuidDataHob (
    &gEfiMemoryTypeInformationGuid,
    mDefaultMemoryTypeInformation,
    sizeof(mDefaultMemoryTypeInformation)
    );

  //
  // Local APIC range
  //
  AddIoMemoryBaseSizeHob (0xFEC80000, 0x80000);

  //
  // I/O APIC range
  //
  AddIoMemoryBaseSizeHob (0xFEC00000, 0x80000);

  //
  // Video memory + Legacy BIOS region
  //
  AddIoMemoryRangeHob (0x0A0000, 0x100000);
}


VOID
MiscInitialization (
  )
{
  //
  // Disable A20 Mask
  //
  IoWrite8 (0x92, (UINT8) (IoRead8 (0x92) | 0x02));

  //
  // Build the CPU hob with 36-bit addressing and 16-bits of IO space.
  //
  BuildCpuHob (36, 16);
}


VOID
ReserveEmuVariableNvStore (
  )
{
  EFI_PHYSICAL_ADDRESS VariableStore;

  //
  // Allocate storage for NV variables early on so it will be
  // at a consistent address.  Since VM memory is preserved
  // across reboots, this allows the NV variable storage to survive
  // a VM reboot.
  //
  VariableStore =
    (EFI_PHYSICAL_ADDRESS)(UINTN)
      AllocateRuntimePool (FixedPcdGet32(PcdVariableStoreSize));
  DEBUG ((EFI_D_INFO,
          "Reserved variable store memory: 0x%lX; size: %dkb\n",
          VariableStore,
          FixedPcdGet32(PcdVariableStoreSize) / 1024
        ));
  PcdSet64 (PcdEmuVariableNvStoreReserved, VariableStore);
}


/**
  Perform Platform PEI initialization.

  @param  FileHandle      Handle of the file being invoked.
  @param  PeiServices     Describes the list of possible PEI Services.

  @return EFI_SUCCESS     The PEIM initialized successfully.

**/
EFI_STATUS
EFIAPI
InitializePlatform (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )
{
  DEBUG ((EFI_D_ERROR, "Platform PEIM Loaded\n"));

  MemDetect ();

  ReserveEmuVariableNvStore ();

  PeiFvInitialization ();

  MemMapInitialization ();

  MiscInitialization ();

  return EFI_SUCCESS;
}