system76-edk2/MdePkg/Include/Uefi/UefiMultiPhase.h

/** @file
  This includes some definitions introduced in UEFI that will be used in both PEI and DXE phases.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef __UEFI_MULTIPHASE_H__
#define __UEFI_MULTIPHASE_H__

///
/// Attributes of variable.
///
#define EFI_VARIABLE_NON_VOLATILE        0x00000001
#define EFI_VARIABLE_BOOTSERVICE_ACCESS  0x00000002
#define EFI_VARIABLE_RUNTIME_ACCESS      0x00000004
///
/// This attribute is identified by the mnemonic 'HR'
/// elsewhere in this specification.
///
#define EFI_VARIABLE_HARDWARE_ERROR_RECORD  0x00000008
///
/// Attributes of Authenticated Variable
///
#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS  0x00000020
#define EFI_VARIABLE_APPEND_WRITE                           0x00000040
///
/// NOTE: EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is deprecated and should be considered reserved.
///
#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS  0x00000010

#ifndef VFRCOMPILE
  #include <Guid/WinCertificate.h>
///
/// Enumeration of memory types introduced in UEFI.
///
typedef enum {
  ///
  /// Not used.
  ///
  EfiReservedMemoryType,
  ///
  /// The code portions of a loaded application.
  /// (Note that UEFI OS loaders are UEFI applications.)
  ///
  EfiLoaderCode,
  ///
  /// The data portions of a loaded application and the default data allocation
  /// type used by an application to allocate pool memory.
  ///
  EfiLoaderData,
  ///
  /// The code portions of a loaded Boot Services Driver.
  ///
  EfiBootServicesCode,
  ///
  /// The data portions of a loaded Boot Serves Driver, and the default data
  /// allocation type used by a Boot Services Driver to allocate pool memory.
  ///
  EfiBootServicesData,
  ///
  /// The code portions of a loaded Runtime Services Driver.
  ///
  EfiRuntimeServicesCode,
  ///
  /// The data portions of a loaded Runtime Services Driver and the default
  /// data allocation type used by a Runtime Services Driver to allocate pool memory.
  ///
  EfiRuntimeServicesData,
  ///
  /// Free (unallocated) memory.
  ///
  EfiConventionalMemory,
  ///
  /// Memory in which errors have been detected.
  ///
  EfiUnusableMemory,
  ///
  /// Memory that holds the ACPI tables.
  ///
  EfiACPIReclaimMemory,
  ///
  /// Address space reserved for use by the firmware.
  ///
  EfiACPIMemoryNVS,
  ///
  /// Used by system firmware to request that a memory-mapped IO region
  /// be mapped by the OS to a virtual address so it can be accessed by EFI runtime services.
  ///
  EfiMemoryMappedIO,
  ///
  /// System memory-mapped IO region that is used to translate memory
  /// cycles to IO cycles by the processor.
  ///
  EfiMemoryMappedIOPortSpace,
  ///
  /// Address space reserved by the firmware for code that is part of the processor.
  ///
  EfiPalCode,
  ///
  /// A memory region that operates as EfiConventionalMemory,
  /// however it happens to also support byte-addressable non-volatility.
  ///
  EfiPersistentMemory,
  EfiMaxMemoryType
} EFI_MEMORY_TYPE;

///
/// Enumeration of reset types.
///
typedef enum {
  ///
  /// Used to induce a system-wide reset. This sets all circuitry within the
  /// system to its initial state.  This type of reset is asynchronous to system
  /// operation and operates withgout regard to cycle boundaries.  EfiColdReset
  /// is tantamount to a system power cycle.
  ///
  EfiResetCold,
  ///
  /// Used to induce a system-wide initialization. The processors are set to their
  /// initial state, and pending cycles are not corrupted.  If the system does
  /// not support this reset type, then an EfiResetCold must be performed.
  ///
  EfiResetWarm,
  ///
  /// Used to induce an entry into a power state equivalent to the ACPI G2/S5 or G3
  /// state.  If the system does not support this reset type, then when the system
  /// is rebooted, it should exhibit the EfiResetCold attributes.
  ///
  EfiResetShutdown,
  ///
  /// Used to induce a system-wide reset. The exact type of the reset is defined by
  /// the EFI_GUID that follows the Null-terminated Unicode string passed into
  /// ResetData. If the platform does not recognize the EFI_GUID in ResetData the
  /// platform must pick a supported reset type to perform. The platform may
  /// optionally log the parameters from any non-normal reset that occurs.
  ///
  EfiResetPlatformSpecific
} EFI_RESET_TYPE;

///
/// Data structure that precedes all of the standard EFI table types.
///
typedef struct {
  ///
  /// A 64-bit signature that identifies the type of table that follows.
  /// Unique signatures have been generated for the EFI System Table,
  /// the EFI Boot Services Table, and the EFI Runtime Services Table.
  ///
  UINT64    Signature;
  ///
  /// The revision of the EFI Specification to which this table
  /// conforms. The upper 16 bits of this field contain the major
  /// revision value, and the lower 16 bits contain the minor revision
  /// value. The minor revision values are limited to the range of 00..99.
  ///
  UINT32    Revision;
  ///
  /// The size, in bytes, of the entire table including the EFI_TABLE_HEADER.
  ///
  UINT32    HeaderSize;
  ///
  /// The 32-bit CRC for the entire table. This value is computed by
  /// setting this field to 0, and computing the 32-bit CRC for HeaderSize bytes.
  ///
  UINT32    CRC32;
  ///
  /// Reserved field that must be set to 0.
  ///
  UINT32    Reserved;
} EFI_TABLE_HEADER;

///
/// AuthInfo is a WIN_CERTIFICATE using the wCertificateType
/// WIN_CERTIFICATE_UEFI_GUID and the CertType
/// EFI_CERT_TYPE_RSA2048_SHA256_GUID. If the attribute specifies
/// authenticated access, then the Data buffer should begin with an
/// authentication descriptor prior to the data payload and DataSize
/// should reflect the the data.and descriptor size. The caller
/// shall digest the Monotonic Count value and the associated data
/// for the variable update using the SHA-256 1-way hash algorithm.
/// The ensuing the 32-byte digest will be signed using the private
/// key associated w/ the public/private 2048-bit RSA key-pair. The
/// WIN_CERTIFICATE shall be used to describe the signature of the
/// Variable data *Data. In addition, the signature will also
/// include the MonotonicCount value to guard against replay attacks.
///
typedef struct {
  ///
  /// Included in the signature of
  /// AuthInfo.Used to ensure freshness/no
  /// replay. Incremented during each
  /// "Write" access.
  ///
  UINT64    MonotonicCount;
  ///
  /// Provides the authorization for the variable
  /// access. It is a signature across the
  /// variable data and the  Monotonic Count
  /// value. Caller uses Private key that is
  /// associated with a public key that has been
  /// provisioned via the key exchange.
  ///
  WIN_CERTIFICATE_UEFI_GUID    AuthInfo;
} EFI_VARIABLE_AUTHENTICATION;

///
/// When the attribute EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS is
/// set, then the Data buffer shall begin with an instance of a complete (and serialized)
/// EFI_VARIABLE_AUTHENTICATION_2 descriptor. The descriptor shall be followed by the new
/// variable value and DataSize shall reflect the combined size of the descriptor and the new
/// variable value. The authentication descriptor is not part of the variable data and is not
/// returned by subsequent calls to GetVariable().
///
typedef struct {
  ///
  /// For the TimeStamp value, components Pad1, Nanosecond, TimeZone, Daylight and
  /// Pad2 shall be set to 0. This means that the time shall always be expressed in GMT.
  ///
  EFI_TIME                     TimeStamp;
  ///
  /// Only a CertType of  EFI_CERT_TYPE_PKCS7_GUID is accepted.
  ///
  WIN_CERTIFICATE_UEFI_GUID    AuthInfo;
} EFI_VARIABLE_AUTHENTICATION_2;
#endif // VFRCOMPILE

#endif