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/** @file
MDE DXE Services Library provides functions that simplify the development of DXE Drivers.
These functions help access data from sections of FFS files or from file path.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __DXE_SERVICES_LIB_H__
#define __DXE_SERVICES_LIB_H__
/**
Searches all the available firmware volumes and returns the first matching FFS section.
This function searches all the firmware volumes for FFS files with FV file type specified by FileType
The order that the firmware volumes is searched is not deterministic. For each available FV a search
is made for FFS file of type FileType. If the FV contains more than one FFS file with the same FileType,
the FileInstance instance will be the matched FFS file. For each FFS file found a search
is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances
of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer.
Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size.
It is the caller's responsibility to use FreePool() to free the allocated buffer.
See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections
are retrieved from an FFS file based on SectionType and SectionInstance.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If Buffer is NULL, then ASSERT().
If Size is NULL, then ASSERT().
@param FileType Indicates the FV file type to search for within all available FVs.
@param FileInstance Indicates which file instance within all available FVs specified by FileType.
FileInstance starts from zero.
@param SectionType Indicates the FFS section type to search for within the FFS file
specified by FileType with FileInstance.
@param SectionInstance Indicates which section instance within the FFS file
specified by FileType with FileInstance to retrieve. SectionInstance starts from zero.
@param Buffer On output, a pointer to a callee allocated buffer containing the FFS file section that was found.
Is it the caller's responsibility to free this buffer using FreePool().
@param Size On output, a pointer to the size, in bytes, of Buffer.
@retval EFI_SUCCESS The specified FFS section was returned.
@retval EFI_NOT_FOUND The specified FFS section could not be found.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve the matching FFS section.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the firmware volume that
contains the matching FFS section does not allow reads.
**/
EFI_STATUS
EFIAPI
GetSectionFromAnyFvByFileType (
IN EFI_FV_FILETYPE FileType,
IN UINTN FileInstance,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
);
/**
Searches all the available firmware volumes and returns the first matching FFS section.
This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.
The order in which the firmware volumes are searched is not deterministic. For each FFS file found, a search
is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances
of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer.
Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size.
It is the caller's responsibility to use FreePool() to free the allocated buffer.
See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections
are retrieved from an FFS file based on SectionType and SectionInstance.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If NameGuid is NULL, then ASSERT().
If Buffer is NULL, then ASSERT().
If Size is NULL, then ASSERT().
@param NameGuid A pointer to to the FFS filename GUID to search for
within any of the firmware volumes in the platform.
@param SectionType Indicates the FFS section type to search for within
the FFS file specified by NameGuid.
@param SectionInstance Indicates which section instance within the FFS file
specified by NameGuid to retrieve.
@param Buffer On output, a pointer to a callee-allocated buffer
containing the FFS file section that was found.
It is the caller's responsibility to free this
buffer using FreePool().
@param Size On output, a pointer to the size, in bytes, of Buffer.
@retval EFI_SUCCESS The specified FFS section was returned.
@retval EFI_NOT_FOUND The specified FFS section could not be found.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve
the matching FFS section.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a
device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the
firmware volume that contains the matching FFS
section does not allow reads.
**/
EFI_STATUS
EFIAPI
GetSectionFromAnyFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
);
/**
Searches the firmware volume that the currently executing module was loaded from and returns the first matching FFS section.
This function searches the firmware volume that the currently executing module was loaded
from for an FFS file with an FFS filename specified by NameGuid. If the FFS file is found, a search
is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance
instances of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer.
Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size.
It is the caller's responsibility to use FreePool() to free the allocated buffer.
See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections are retrieved from
an FFS file based on SectionType and SectionInstance.
If the currently executing module was not loaded from a firmware volume, then EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If NameGuid is NULL, then ASSERT().
If Buffer is NULL, then ASSERT().
If Size is NULL, then ASSERT().
@param NameGuid A pointer to to the FFS filename GUID to search for
within the firmware volumes that the currently
executing module was loaded from.
@param SectionType Indicates the FFS section type to search for within
the FFS file specified by NameGuid.
@param SectionInstance Indicates which section instance within the FFS
file specified by NameGuid to retrieve.
@param Buffer On output, a pointer to a callee allocated buffer
containing the FFS file section that was found.
It is the caller's responsibility to free this buffer
using FreePool().
@param Size On output, a pointer to the size, in bytes, of Buffer.
@retval EFI_SUCCESS The specified FFS section was returned.
@retval EFI_NOT_FOUND The specified FFS section could not be found.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve
the matching FFS section.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a
device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the
firmware volume that contains the matching FFS
section does not allow reads.
**/
EFI_STATUS
EFIAPI
GetSectionFromFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
);
/**
Searches the FFS file the currently executing module was loaded from and returns the first matching FFS section.
This function searches the FFS file that the currently executing module was loaded from for a FFS sections of type SectionType.
If the FFS file contains at least SectionInstance instances of the FFS section specified by SectionType,
then the SectionInstance instance is returned in Buffer. Buffer is allocated using AllocatePool(),
and the size of the allocated buffer is returned in Size. It is the caller's responsibility
to use FreePool() to free the allocated buffer. See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for
details on how sections are retrieved from an FFS file based on SectionType and SectionInstance.
If the currently executing module was not loaded from an FFS file, then EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If Buffer is NULL, then ASSERT().
If Size is NULL, then ASSERT().
@param SectionType Indicates the FFS section type to search for within
the FFS file that the currently executing module
was loaded from.
@param SectionInstance Indicates which section instance to retrieve within
the FFS file that the currently executing module
was loaded from.
@param Buffer On output, a pointer to a callee allocated buffer
containing the FFS file section that was found.
It is the caller's responsibility to free this buffer
using FreePool().
@param Size On output, a pointer to the size, in bytes, of Buffer.
@retval EFI_SUCCESS The specified FFS section was returned.
@retval EFI_NOT_FOUND The specified FFS section could not be found.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve
the matching FFS section.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a
device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the
firmware volume that contains the matching FFS
section does not allow reads.
**/
EFI_STATUS
EFIAPI
GetSectionFromFfs (
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
);
/**
Get the image file buffer data and buffer size by its device path.
Access the file either from a firmware volume, from a file system interface,
or from the load file interface.
Allocate memory to store the found image. The caller is responsible to free memory.
If FilePath is NULL, then NULL is returned.
If FileSize is NULL, then NULL is returned.
If AuthenticationStatus is NULL, then NULL is returned.
@param[in] BootPolicy The policy for Open Image File.If TRUE,
indicates that the request originates from
the boot manager, and that the boot manager is
attempting to load FilePath as a boot selection.
If FALSE, then FilePath must match an exact
file to be loaded.
@param[in] FilePath Pointer to the device path of the file that is abstracted to
the file buffer.
@param[out] FileSize Pointer to the size of the abstracted file buffer.
@param[out] AuthenticationStatus Pointer to the authentication status.
@retval NULL FilePath is NULL, or FileSize is NULL, or AuthenticationStatus is NULL, or the file can't be found.
@retval other The abstracted file buffer. The caller is responsible to free memory.
**/
VOID *
EFIAPI
GetFileBufferByFilePath (
IN BOOLEAN BootPolicy,
IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath,
OUT UINTN *FileSize,
OUT UINT32 *AuthenticationStatus
);
/**
Searches all the available firmware volumes and returns the file device path of first matching
FFS section.
This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.
The order that the firmware volumes is searched is not deterministic. For each FFS file found a search
is made for FFS sections of type SectionType.
If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
the search will be retried with a section type of EFI_SECTION_PE32.
This function must be called with a TPL <= TPL_NOTIFY.
If NameGuid is NULL, then ASSERT().
@param NameGuid A pointer to to the FFS filename GUID to search for
within any of the firmware volumes in the platform.
@param SectionType Indicates the FFS section type to search for within
the FFS file specified by NameGuid.
@param SectionInstance Indicates which section instance within the FFS file
specified by NameGuid to retrieve.
@param FvFileDevicePath Device path for the target FFS
file.
@retval EFI_SUCCESS The specified file device path of FFS section was returned.
@retval EFI_NOT_FOUND The specified file device path of FFS section could not be found.
@retval EFI_DEVICE_ERROR The FFS section could not be retrieves due to a
device error.
@retval EFI_ACCESS_DENIED The FFS section could not be retrieves because the
firmware volume that contains the matching FFS section does not
allow reads.
@retval EFI_INVALID_PARAMETER FvFileDevicePath is NULL.
**/
EFI_STATUS
EFIAPI
GetFileDevicePathFromAnyFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN SectionInstance,
OUT EFI_DEVICE_PATH_PROTOCOL **FvFileDevicePath
);
/**
Allocates one or more 4KB pages of a given type from a memory region that is
accessible to PEI.
Allocates the number of 4KB pages of type 'MemoryType' and returns a
pointer to the allocated buffer. The buffer returned is aligned on a 4KB
boundary. If Pages is 0, then NULL is returned. If there is not enough
memory remaining to satisfy the request, then NULL is returned.
@param[in] MemoryType The memory type to allocate
@param[in] Pages The number of 4 KB pages to allocate.
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
VOID *
EFIAPI
AllocatePeiAccessiblePages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages
);
#endif
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