Fix up the comment for several functions and make sure the IN and OUT modifier of...

[mirror_edk2.git] / MdePkg / Library / PeiServicesLib / PeiServicesLib.c

/** @file
  Implementation for PEI Services Library.

  Copyright (c) 2006 - 2007, Intel Corporation<BR>
  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 <Library/PeiServicesLib.h>
#include <Library/PeiServicesTablePointerLib.h>

/**
  This service enables a given PEIM to register an interface into the PEI Foundation.

  @param  PpiList               A pointer to the list of interfaces that the caller shall install.

  @retval EFI_SUCCESS           The interface was successfully installed.
  @retval EFI_INVALID_PARAMETER The PpiList pointer is NULL.
  @retval EFI_INVALID_PARAMETER Any of the PEI PPI descriptors in the list do not have the
                                EFI_PEI_PPI_DESCRIPTOR_PPI bit set in the Flags field.
  @retval EFI_OUT_OF_RESOURCES  There is no additional space in the PPI database.

**/
EFI_STATUS
EFIAPI
PeiServicesInstallPpi (
  IN CONST EFI_PEI_PPI_DESCRIPTOR     *PpiList
  )
{
  CONST EFI_PEI_SERVICES  **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES  **) GetPeiServicesTablePointer ();
  return (*PeiServices)->InstallPpi (PeiServices, PpiList);
}

/**
  This service enables PEIMs to replace an entry in the PPI database with an alternate entry.

  @param  OldPpi                Pointer to the old PEI PPI Descriptors.
  @param  NewPpi                Pointer to the new PEI PPI Descriptors.

  @retval EFI_SUCCESS           The interface was successfully installed.
  @retval EFI_INVALID_PARAMETER The OldPpi or NewPpi is NULL.
  @retval EFI_INVALID_PARAMETER Any of the PEI PPI descriptors in the list do not have the
                                EFI_PEI_PPI_DESCRIPTOR_PPI bit set in the Flags field.
  @retval EFI_OUT_OF_RESOURCES  There is no additional space in the PPI database.
  @retval EFI_NOT_FOUND         The PPI for which the reinstallation was requested has not been
                                installed.

**/
EFI_STATUS
EFIAPI
PeiServicesReInstallPpi (
  IN CONST EFI_PEI_PPI_DESCRIPTOR     *OldPpi,
  IN CONST EFI_PEI_PPI_DESCRIPTOR     *NewPpi
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->ReInstallPpi (PeiServices, OldPpi, NewPpi);
}

/**
  This service enables PEIMs to discover a given instance of an interface.

  @param  Guid                  A pointer to the GUID whose corresponding interface needs to be
                                found.
  @param  Instance              The N-th instance of the interface that is required.
  @param  PpiDescriptor         A pointer to instance of the EFI_PEI_PPI_DESCRIPTOR.
  @param  Ppi                   A pointer to the instance of the interface.

  @retval EFI_SUCCESS           The interface was successfully returned.
  @retval EFI_NOT_FOUND         The PPI descriptor is not found in the database.

**/
EFI_STATUS
EFIAPI
PeiServicesLocatePpi (
  IN CONST EFI_GUID                   *Guid,
  IN UINTN                      Instance,
  IN OUT EFI_PEI_PPI_DESCRIPTOR **PpiDescriptor,
  IN OUT VOID                   **Ppi
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->LocatePpi (PeiServices, Guid, Instance, PpiDescriptor, Ppi);
}

/**
  This service enables PEIMs to register a given service to be invoked when another service is
  installed or reinstalled.

  @param  NotifyList            A pointer to the list of notification interfaces that the caller
                                shall install.

  @retval EFI_SUCCESS           The interface was successfully installed.
  @retval EFI_INVALID_PARAMETER The NotifyList pointer is NULL.
  @retval EFI_INVALID_PARAMETER Any of the PEI notify descriptors in the list do not have the
                                EFI_PEI_PPI_DESCRIPTOR_NOTIFY_TYPES bit set in the Flags field.
  @retval EFI_OUT_OF_RESOURCES  There is no additional space in the PPI database.

**/
EFI_STATUS
EFIAPI
PeiServicesNotifyPpi (
  IN CONST EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyList
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->NotifyPpi (PeiServices, NotifyList);
}

/**
  This service enables PEIMs to ascertain the present value of the boot mode.

  @param  BootMode              A pointer to contain the value of the boot mode.

  @retval EFI_SUCCESS           The boot mode was returned successfully.
  @retval EFI_INVALID_PARAMETER BootMode is NULL.

**/
EFI_STATUS
EFIAPI
PeiServicesGetBootMode (
  IN OUT EFI_BOOT_MODE          *BootMode
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->GetBootMode (PeiServices, BootMode);
}

/**
  This service enables PEIMs to update the boot mode variable.

  @param  BootMode              The value of the boot mode to set.

  @retval EFI_SUCCESS           The value was successfully updated

**/
EFI_STATUS
EFIAPI
PeiServicesSetBootMode (
  IN EFI_BOOT_MODE              BootMode
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->SetBootMode (PeiServices, BootMode);
}

/**
  This service enables a PEIM to ascertain the address of the list of HOBs in memory.

  @param  HobList               A pointer to the list of HOBs that the PEI Foundation will initialize.

  @retval EFI_SUCCESS           The list was successfully returned.
  @retval EFI_NOT_AVAILABLE_YET The HOB list is not yet published.

**/
EFI_STATUS
EFIAPI
PeiServicesGetHobList (
  IN OUT VOID                   **HobList
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->GetHobList (PeiServices, HobList);
}

/**
  This service enables PEIMs to create various types of HOBs.

  @param  Type                  The type of HOB to be installed.
  @param  Length                The length of the HOB to be added.
  @param  Hob                   The address of a pointer that will contain the HOB header.

  @retval EFI_SUCCESS           The HOB was successfully created.
  @retval EFI_OUT_OF_RESOURCES  There is no additional space for HOB creation.

**/
EFI_STATUS
EFIAPI
PeiServicesCreateHob (
  IN UINT16                     Type,
  IN UINT16                     Length,
  IN OUT VOID                   **Hob
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->CreateHob (PeiServices, Type, Length, Hob);
}

/**
  This service enables PEIMs to discover additional firmware volumes.

  @param  Instance              This instance of the firmware volume to find.  The value 0 is the
                                Boot Firmware Volume (BFV).
  @param  FwVolHeader           Pointer to the firmware volume header of the volume to return.

  @retval EFI_SUCCESS           The volume was found.
  @retval EFI_NOT_FOUND         The volume was not found.
  @retval EFI_INVALID_PARAMETER FwVolHeader is NULL.

**/
EFI_STATUS
EFIAPI
PeiServicesFfsFindNextVolume (
  IN UINTN                          Instance,
  IN OUT EFI_PEI_FV_HANDLE          *VolumeHandle
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->FfsFindNextVolume (PeiServices, Instance, VolumeHandle);
}

/**
  This service enables PEIMs to discover additional firmware files.

  @param  SearchType            A filter to find files only of this type.
  @param  FwVolHeader           Pointer to the firmware volume header of the volume to search.
                                This parameter must point to a valid FFS volume.
  @param  FileHeader            Pointer to the current file from which to begin searching.

  @retval EFI_SUCCESS           The file was found.
  @retval EFI_NOT_FOUND         The file was not found.
  @retval EFI_NOT_FOUND         The header checksum was not zero.

**/
EFI_STATUS
EFIAPI
PeiServicesFfsFindNextFile (
  IN EFI_FV_FILETYPE            SearchType,
  IN EFI_PEI_FV_HANDLE          VolumeHandle,
  IN OUT EFI_PEI_FILE_HANDLE    *FileHandle
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->FfsFindNextFile (PeiServices, SearchType, VolumeHandle, FileHandle);
}

/**
  This service enables PEIMs to discover sections of a given type within a valid FFS file.

  @param  SearchType            The value of the section type to find.
  @param  FfsFileHeader         A pointer to the file header that contains the set of sections to
                                be searched.
  @param  SectionData           A pointer to the discovered section, if successful.

  @retval EFI_SUCCESS           The section was found.
  @retval EFI_NOT_FOUND         The section was not found.

**/
EFI_STATUS
EFIAPI
PeiServicesFfsFindSectionData (
  IN EFI_SECTION_TYPE           SectionType,
  IN EFI_PEI_FILE_HANDLE        FfsFileHeader,
  OUT VOID                      **SectionData
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->FfsFindSectionData (PeiServices, SectionType, FfsFileHeader, SectionData);
}

/**
  This service enables PEIMs to register the permanent memory configuration
  that has been initialized with the PEI Foundation.

  @param  MemoryBegin           The value of a region of installed memory.
  @param  MemoryLength          The corresponding length of a region of installed memory.

  @retval EFI_SUCCESS           The region was successfully installed in a HOB.
  @retval EFI_INVALID_PARAMETER MemoryBegin and MemoryLength are illegal for this system.
  @retval EFI_OUT_OF_RESOURCES  There is no additional space for HOB creation.

**/
EFI_STATUS
EFIAPI
PeiServicesInstallPeiMemory (
  IN EFI_PHYSICAL_ADDRESS       MemoryBegin,
  IN UINT64                     MemoryLength
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->InstallPeiMemory (PeiServices, MemoryBegin, MemoryLength);
}

/**
  This service enables PEIMs to allocate memory after the permanent memory has been installed by a
  PEIM.

  @param  MemoryType            Type of memory to allocate.
  @param  Pages                 Number of pages to allocate.
  @param  Memory                Pointer of memory allocated.

  @retval EFI_SUCCESS           The memory range was successfully allocated.
  @retval EFI_INVALID_PARAMETER Type is not equal to AllocateAnyPages.
  @retval EFI_NOT_AVAILABLE_YET Called with permanent memory not available.
  @retval EFI_OUT_OF_RESOURCES  The pages could not be allocated.

**/
EFI_STATUS
EFIAPI
PeiServicesAllocatePages (
  IN EFI_MEMORY_TYPE            MemoryType,
  IN UINTN                      Pages,
  OUT EFI_PHYSICAL_ADDRESS      *Memory
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->AllocatePages (PeiServices, MemoryType, Pages, Memory);
}

/**
  This service allocates memory from the Hand-Off Block (HOB) heap.

  @param  Size                  The number of bytes to allocate from the pool.
  @param  Buffer                If the call succeeds, a pointer to a pointer to the allocate
                                buffer; undefined otherwise.

  @retval EFI_SUCCESS           The allocation was successful
  @retval EFI_OUT_OF_RESOURCES  There is not enough heap to allocate the requested size.

**/
EFI_STATUS
EFIAPI
PeiServicesAllocatePool (
  IN UINTN                      Size,
  OUT VOID                      **Buffer
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->AllocatePool (PeiServices, Size, Buffer);
}

/**
  Resets the entire platform.

  @param  VOID

  @retval EFI_SUCCESS           The function completed successfully.
  @retval EFI_NOT_AVAILABLE_YET The service has not been installed yet.

**/
EFI_STATUS
EFIAPI
PeiServicesResetSystem (
  VOID
  )
{
  CONST EFI_PEI_SERVICES **PeiServices;

  PeiServices = (CONST EFI_PEI_SERVICES **) GetPeiServicesTablePointer ();
  return (*PeiServices)->ResetSystem (PeiServices);
}

/**
  This service is a wrapper for the PEI Service RegisterForShadow(), except the pointer to the PEI Services 
  Table has been removed.  See the Platform Initialization Pre-EFI Initialization Core Interface 
  Specification for details. 

  @param FileHandle   PEIM's file handle. Must be the currently
                      executing PEIM.
  
  @retval EFI_SUCCESS   The PEIM was successfully registered for
                        shadowing.

  @retval EFI_ALREADY_STARTED   The PEIM was previously
                                registered for shadowing.

  @retval EFI_NOT_FOUND   The FileHandle does not refer to a
                          valid file handle.
**/
EFI_STATUS
EFIAPI
PeiServicesRegisterForShadow (
  IN  EFI_PEI_FILE_HANDLE FileHandle
  )
{
  EFI_PEI_SERVICES **PeiServices;

  PeiServices = GetPeiServicesTablePointer ();
  return (*PeiServices)->RegisterForShadow (FileHandle);
}

/**
  This service is a wrapper for the PEI Service FfsGetFileInfo(), except the pointer to the PEI Services 
  Table has been removed.  See the Platform Initialization Pre-EFI Initialization Core Interface 
  Specification for details. 

  @param FileHandle   Handle of the file.

  @param FileInfo     Upon exit, points to the file's
                      information.

  @retval EFI_SUCCESS             File information returned.
  
  @retval EFI_INVALID_PARAMETER   If FileHandle does not
                                  represent a valid file.
  
  @retval EFI_INVALID_PARAMETER   If FileInfo is NULL.
  
**/
EFI_STATUS
EFIAPI
PeiServicesFfsGetFileInfo (
  IN CONST  EFI_PEI_FILE_HANDLE   FileHandle,
  OUT EFI_FV_FILE_INFO            *FileInfo
  )
{
  EFI_PEI_SERVICES **PeiServices;

  PeiServices = GetPeiServicesTablePointer ();
  return (*PeiServices)->FfsGetFileInfo (FileHandle, FileInfo);
}


/**
  This service is a wrapper for the PEI Service FfsFindByName(), except the pointer to the PEI Services 
  Table has been removed.  See the Platform Initialization Pre-EFI Initialization Core Interface 
  Specification for details. 

  @param FileName       A pointer to the name of the file to
                        find within the firmware volume.

  @param VolumeHandle   The firmware volume to search FileHandle
                        Upon exit, points to the found file's
                        handle or NULL if it could not be found.

  @retval EFI_SUCCESS             File was found.

  @retval EFI_NOT_FOUND           File was not found.

  @retval EFI_INVALID_PARAMETER   VolumeHandle or FileHandle or
                                  FileName was NULL.

**/
EFI_STATUS
EFIAPI
PeiServicesFfsFindFileByName (
  IN CONST  EFI_GUID            *FileName,
  IN CONST  EFI_PEI_FV_HANDLE   VolumeHandle,
  OUT       EFI_PEI_FILE_HANDLE *FileHandle
  )
{
  return (*GetPeiServicesTablePointer())->FfsFindFileByName (FileName, VolumeHandle, FileHandle);
}


/**
  This service is a wrapper for the PEI Service FfsGetVolumeInfo(), except the pointer to the PEI Services 
  Table has been removed.  See the Platform Initialization Pre-EFI Initialization Core Interface 
  Specification for details. 

  @param VolumeHandle   Handle of the volume.

  @param VolumeInfo     Upon exit, points to the volume's
                        information.

  @retval EFI_SUCCESS             File information returned.
  
  @retval EFI_INVALID_PARAMETER   If FileHandle does not
                                  represent a valid file.
  
  @retval EFI_INVALID_PARAMETER   If FileInfo is NULL.

**/
EFI_STATUS
EFIAPI
PeiServicesFfsGetVolumeInfo (
  IN  EFI_PEI_FV_HANDLE       VolumeHandle,
  OUT EFI_FV_INFO             *VolumeInfo
  )
{
  return (*GetPeiServicesTablePointer())->FfsGetVolumeInfo (VolumeHandle, VolumeInfo);
}