system76-edk2/MdePkg/Include/Pi/PiFirmwareVolume.h

/** @file
  The firmware volume related definitions in PI.

  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

  @par Revision Reference:
  PI Version 1.6

**/

#ifndef __PI_FIRMWAREVOLUME_H__
#define __PI_FIRMWAREVOLUME_H__

///
/// EFI_FV_FILE_ATTRIBUTES
///
typedef UINT32  EFI_FV_FILE_ATTRIBUTES;

//
// Value of EFI_FV_FILE_ATTRIBUTES.
//
#define EFI_FV_FILE_ATTRIB_ALIGNMENT      0x0000001F
#define EFI_FV_FILE_ATTRIB_FIXED          0x00000100
#define EFI_FV_FILE_ATTRIB_MEMORY_MAPPED  0x00000200

///
/// type of EFI FVB attribute
///
typedef UINT32  EFI_FVB_ATTRIBUTES_2;

//
// Attributes bit definitions
//
#define EFI_FVB2_READ_DISABLED_CAP  0x00000001
#define EFI_FVB2_READ_ENABLED_CAP   0x00000002
#define EFI_FVB2_READ_STATUS        0x00000004
#define EFI_FVB2_WRITE_DISABLED_CAP 0x00000008
#define EFI_FVB2_WRITE_ENABLED_CAP  0x00000010
#define EFI_FVB2_WRITE_STATUS       0x00000020
#define EFI_FVB2_LOCK_CAP           0x00000040
#define EFI_FVB2_LOCK_STATUS        0x00000080
#define EFI_FVB2_STICKY_WRITE       0x00000200
#define EFI_FVB2_MEMORY_MAPPED      0x00000400
#define EFI_FVB2_ERASE_POLARITY     0x00000800
#define EFI_FVB2_READ_LOCK_CAP      0x00001000
#define EFI_FVB2_READ_LOCK_STATUS   0x00002000
#define EFI_FVB2_WRITE_LOCK_CAP     0x00004000
#define EFI_FVB2_WRITE_LOCK_STATUS  0x00008000
#define EFI_FVB2_ALIGNMENT          0x001F0000
#define EFI_FVB2_ALIGNMENT_1        0x00000000
#define EFI_FVB2_ALIGNMENT_2        0x00010000
#define EFI_FVB2_ALIGNMENT_4        0x00020000
#define EFI_FVB2_ALIGNMENT_8        0x00030000
#define EFI_FVB2_ALIGNMENT_16       0x00040000
#define EFI_FVB2_ALIGNMENT_32       0x00050000
#define EFI_FVB2_ALIGNMENT_64       0x00060000
#define EFI_FVB2_ALIGNMENT_128      0x00070000
#define EFI_FVB2_ALIGNMENT_256      0x00080000
#define EFI_FVB2_ALIGNMENT_512      0x00090000
#define EFI_FVB2_ALIGNMENT_1K       0x000A0000
#define EFI_FVB2_ALIGNMENT_2K       0x000B0000
#define EFI_FVB2_ALIGNMENT_4K       0x000C0000
#define EFI_FVB2_ALIGNMENT_8K       0x000D0000
#define EFI_FVB2_ALIGNMENT_16K      0x000E0000
#define EFI_FVB2_ALIGNMENT_32K      0x000F0000
#define EFI_FVB2_ALIGNMENT_64K      0x00100000
#define EFI_FVB2_ALIGNMENT_128K     0x00110000
#define EFI_FVB2_ALIGNMENT_256K     0x00120000
#define EFI_FVB2_ALIGNMENT_512K     0x00130000
#define EFI_FVB2_ALIGNMENT_1M       0x00140000
#define EFI_FVB2_ALIGNMENT_2M       0x00150000
#define EFI_FVB2_ALIGNMENT_4M       0x00160000
#define EFI_FVB2_ALIGNMENT_8M       0x00170000
#define EFI_FVB2_ALIGNMENT_16M      0x00180000
#define EFI_FVB2_ALIGNMENT_32M      0x00190000
#define EFI_FVB2_ALIGNMENT_64M      0x001A0000
#define EFI_FVB2_ALIGNMENT_128M     0x001B0000
#define EFI_FVB2_ALIGNMENT_256M     0x001C0000
#define EFI_FVB2_ALIGNMENT_512M     0x001D0000
#define EFI_FVB2_ALIGNMENT_1G       0x001E0000
#define EFI_FVB2_ALIGNMENT_2G       0x001F0000
#define EFI_FVB2_WEAK_ALIGNMENT     0x80000000

typedef struct {
  ///
  /// The number of sequential blocks which are of the same size.
  ///
  UINT32 NumBlocks;
  ///
  /// The size of the blocks.
  ///
  UINT32 Length;
} EFI_FV_BLOCK_MAP_ENTRY;

///
/// Describes the features and layout of the firmware volume.
///
typedef struct {
  ///
  /// The first 16 bytes are reserved to allow for the reset vector of
  /// processors whose reset vector is at address 0.
  ///
  UINT8                     ZeroVector[16];
  ///
  /// Declares the file system with which the firmware volume is formatted.
  ///
  EFI_GUID                  FileSystemGuid;
  ///
  /// Length in bytes of the complete firmware volume, including the header.
  ///
  UINT64                    FvLength;
  ///
  /// Set to EFI_FVH_SIGNATURE
  ///
  UINT32                    Signature;
  ///
  /// Declares capabilities and power-on defaults for the firmware volume.
  ///
  EFI_FVB_ATTRIBUTES_2      Attributes;
  ///
  /// Length in bytes of the complete firmware volume header.
  ///
  UINT16                    HeaderLength;
  ///
  /// A 16-bit checksum of the firmware volume header. A valid header sums to zero.
  ///
  UINT16                    Checksum;
  ///
  /// Offset, relative to the start of the header, of the extended header
  /// (EFI_FIRMWARE_VOLUME_EXT_HEADER) or zero if there is no extended header.
  ///
  UINT16                    ExtHeaderOffset;
  ///
  /// This field must always be set to zero.
  ///
  UINT8                     Reserved[1];
  ///
  /// Set to 2. Future versions of this specification may define new header fields and will
  /// increment the Revision field accordingly.
  ///
  UINT8                     Revision;
  ///
  /// An array of run-length encoded FvBlockMapEntry structures. The array is
  /// terminated with an entry of {0,0}.
  ///
  EFI_FV_BLOCK_MAP_ENTRY    BlockMap[1];
} EFI_FIRMWARE_VOLUME_HEADER;

#define EFI_FVH_SIGNATURE SIGNATURE_32 ('_', 'F', 'V', 'H')

///
/// Firmware Volume Header Revision definition
///
#define EFI_FVH_REVISION  0x02

///
/// Extension header pointed by ExtHeaderOffset of volume header.
///
typedef struct {
  ///
  /// Firmware volume name.
  ///
  EFI_GUID  FvName;
  ///
  /// Size of the rest of the extension header, including this structure.
  ///
  UINT32    ExtHeaderSize;
} EFI_FIRMWARE_VOLUME_EXT_HEADER;

///
/// Entry struture for describing FV extension header
///
typedef struct {
  ///
  /// Size of this header extension.
  ///
  UINT16    ExtEntrySize;
  ///
  /// Type of the header.
  ///
  UINT16    ExtEntryType;
} EFI_FIRMWARE_VOLUME_EXT_ENTRY;

#define EFI_FV_EXT_TYPE_OEM_TYPE  0x01
///
/// This extension header provides a mapping between a GUID and an OEM file type.
///
typedef struct {
  ///
  /// Standard extension entry, with the type EFI_FV_EXT_TYPE_OEM_TYPE.
  ///
  EFI_FIRMWARE_VOLUME_EXT_ENTRY Hdr;
  ///
  /// A bit mask, one bit for each file type between 0xC0 (bit 0) and 0xDF (bit 31). If a bit
  /// is '1', then the GUID entry exists in Types. If a bit is '0' then no GUID entry exists in Types.
  ///
  UINT32    TypeMask;
  ///
  /// An array of GUIDs, each GUID representing an OEM file type.
  ///
  /// EFI_GUID  Types[1];
  ///
} EFI_FIRMWARE_VOLUME_EXT_ENTRY_OEM_TYPE;

#define EFI_FV_EXT_TYPE_GUID_TYPE 0x0002

///
/// This extension header EFI_FIRMWARE_VOLUME_EXT_ENTRY_GUID_TYPE provides a vendor specific
/// GUID FormatType type which includes a length and a successive series of data bytes.
///
typedef struct {
  ///
  /// Standard extension entry, with the type EFI_FV_EXT_TYPE_OEM_TYPE.
  ///
  EFI_FIRMWARE_VOLUME_EXT_ENTRY     Hdr;
  ///
  /// Vendor-specific GUID.
  ///
  EFI_GUID                          FormatType;
  ///
  /// An arry of bytes of length Length.
  ///
  /// UINT8                             Data[1];
  ///
} EFI_FIRMWARE_VOLUME_EXT_ENTRY_GUID_TYPE;

#define EFI_FV_EXT_TYPE_USED_SIZE_TYPE 0x03

///
/// The EFI_FIRMWARE_VOLUME_EXT_ENTRY_USED_SIZE_TYPE can be used to find
/// out how many EFI_FVB2_ERASE_POLARITY bytes are at the end of the FV.
///
typedef struct {
  ///
  /// Standard extension entry, with the type EFI_FV_EXT_TYPE_USED_SIZE_TYPE.
  ///
  EFI_FIRMWARE_VOLUME_EXT_ENTRY     Hdr;
  ///
  /// The number of bytes of the FV that are in uses. The remaining
  /// EFI_FIRMWARE_VOLUME_HEADER FvLength minus UsedSize bytes in
  /// the FV must contain the value implied by EFI_FVB2_ERASE_POLARITY.
  ///
  UINT32                            UsedSize;
} EFI_FIRMWARE_VOLUME_EXT_ENTRY_USED_SIZE_TYPE;

#endif