UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / MdePkg / Include / Uefi / UefiPxe.h

/** @file
  This header file contains all of the PXE type definitions,
  structure prototypes, global variables and constants that
  are needed for porting PXE to EFI.

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

  @par Revision Reference:
  32/64-bit PXE specification:
  alpha-4, 99-Dec-17.

**/

#ifndef __EFI_PXE_H__
#define __EFI_PXE_H__

#pragma pack(1)

#define PXE_BUSTYPE(a, b, c, d) \
    ( \
      (((PXE_UINT32) (d) & 0xFF) << 24) | (((PXE_UINT32) (c) & 0xFF) << 16) | (((PXE_UINT32) (b) & 0xFF) << 8) | \
        ((PXE_UINT32) (a) & 0xFF) \
    )

///
/// UNDI ROM ID and devive ID signature.
///
#define PXE_BUSTYPE_PXE  PXE_BUSTYPE ('!', 'P', 'X', 'E')

///
/// BUS ROM ID signatures.
///
#define PXE_BUSTYPE_PCI      PXE_BUSTYPE ('P', 'C', 'I', 'R')
#define PXE_BUSTYPE_PC_CARD  PXE_BUSTYPE ('P', 'C', 'C', 'R')
#define PXE_BUSTYPE_USB      PXE_BUSTYPE ('U', 'S', 'B', 'R')
#define PXE_BUSTYPE_1394     PXE_BUSTYPE ('1', '3', '9', '4')

#define PXE_SWAP_UINT16(n)  ((((PXE_UINT16) (n) & 0x00FF) << 8) | (((PXE_UINT16) (n) & 0xFF00) >> 8))

#define PXE_SWAP_UINT32(n) \
  ((((PXE_UINT32)(n) & 0x000000FF) << 24) | \
   (((PXE_UINT32)(n) & 0x0000FF00) << 8)  | \
   (((PXE_UINT32)(n) & 0x00FF0000) >> 8)  | \
   (((PXE_UINT32)(n) & 0xFF000000) >> 24))

#define PXE_SWAP_UINT64(n) \
  ((((PXE_UINT64)(n) & 0x00000000000000FFULL) << 56) | \
   (((PXE_UINT64)(n) & 0x000000000000FF00ULL) << 40) | \
   (((PXE_UINT64)(n) & 0x0000000000FF0000ULL) << 24) | \
   (((PXE_UINT64)(n) & 0x00000000FF000000ULL) << 8)  | \
   (((PXE_UINT64)(n) & 0x000000FF00000000ULL) >> 8)  | \
   (((PXE_UINT64)(n) & 0x0000FF0000000000ULL) >> 24) | \
   (((PXE_UINT64)(n) & 0x00FF000000000000ULL) >> 40) | \
   (((PXE_UINT64)(n) & 0xFF00000000000000ULL) >> 56))

#define PXE_CPBSIZE_NOT_USED  0               ///< zero
#define PXE_DBSIZE_NOT_USED   0               ///< zero
#define PXE_CPBADDR_NOT_USED  (PXE_UINT64) 0  ///< zero
#define PXE_DBADDR_NOT_USED   (PXE_UINT64) 0  ///< zero
#define PXE_CONST             CONST

#define PXE_VOLATILE  volatile

typedef VOID    PXE_VOID;
typedef UINT8   PXE_UINT8;
typedef UINT16  PXE_UINT16;
typedef UINT32  PXE_UINT32;
typedef UINTN   PXE_UINTN;

///
/// Typedef unsigned long PXE_UINT64.
///
typedef UINT64 PXE_UINT64;

typedef PXE_UINT8 PXE_BOOL;
#define PXE_FALSE  0           ///< zero
#define PXE_TRUE   (!PXE_FALSE)

typedef PXE_UINT16 PXE_OPCODE;

///
/// Return UNDI operational state.
///
#define PXE_OPCODE_GET_STATE  0x0000

///
/// Change UNDI operational state from Stopped to Started.
///
#define PXE_OPCODE_START  0x0001

///
/// Change UNDI operational state from Started to Stopped.
///
#define PXE_OPCODE_STOP  0x0002

///
/// Get UNDI initialization information.
///
#define PXE_OPCODE_GET_INIT_INFO  0x0003

///
/// Get NIC configuration information.
///
#define PXE_OPCODE_GET_CONFIG_INFO  0x0004

///
/// Changed UNDI operational state from Started to Initialized.
///
#define PXE_OPCODE_INITIALIZE  0x0005

///
/// Re-initialize the NIC H/W.
///
#define PXE_OPCODE_RESET  0x0006

///
/// Change the UNDI operational state from Initialized to Started.
///
#define PXE_OPCODE_SHUTDOWN  0x0007

///
/// Read & change state of external interrupt enables.
///
#define PXE_OPCODE_INTERRUPT_ENABLES  0x0008

///
/// Read & change state of packet receive filters.
///
#define PXE_OPCODE_RECEIVE_FILTERS  0x0009

///
/// Read & change station MAC address.
///
#define PXE_OPCODE_STATION_ADDRESS  0x000A

///
/// Read traffic statistics.
///
#define PXE_OPCODE_STATISTICS  0x000B

///
/// Convert multicast IP address to multicast MAC address.
///
#define PXE_OPCODE_MCAST_IP_TO_MAC  0x000C

///
/// Read or change non-volatile storage on the NIC.
///
#define PXE_OPCODE_NVDATA  0x000D

///
/// Get & clear interrupt status.
///
#define PXE_OPCODE_GET_STATUS  0x000E

///
/// Fill media header in packet for transmit.
///
#define PXE_OPCODE_FILL_HEADER  0x000F

///
/// Transmit packet(s).
///
#define PXE_OPCODE_TRANSMIT  0x0010

///
/// Receive packet.
///
#define PXE_OPCODE_RECEIVE  0x0011

///
/// Last valid PXE UNDI OpCode number.
///
#define PXE_OPCODE_LAST_VALID  0x0011

typedef PXE_UINT16 PXE_OPFLAGS;

#define PXE_OPFLAGS_NOT_USED  0x0000

//
// //////////////////////////////////////
// UNDI Get State
//
// No OpFlags

////////////////////////////////////////
// UNDI Start
//
// No OpFlags

////////////////////////////////////////
// UNDI Stop
//
// No OpFlags

////////////////////////////////////////
// UNDI Get Init Info
//
// No Opflags

////////////////////////////////////////
// UNDI Get Config Info
//
// No Opflags

///
/// UNDI Initialize
///
#define PXE_OPFLAGS_INITIALIZE_CABLE_DETECT_MASK    0x0001
#define PXE_OPFLAGS_INITIALIZE_DETECT_CABLE         0x0000
#define PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE  0x0001

///
///
/// UNDI Reset
///
#define PXE_OPFLAGS_RESET_DISABLE_INTERRUPTS  0x0001
#define PXE_OPFLAGS_RESET_DISABLE_FILTERS     0x0002

///
/// UNDI Shutdown.
///
/// No OpFlags.

///
/// UNDI Interrupt Enables.
///
///
/// Select whether to enable or disable external interrupt signals.
/// Setting both enable and disable will return PXE_STATCODE_INVALID_OPFLAGS.
///
#define PXE_OPFLAGS_INTERRUPT_OPMASK   0xC000
#define PXE_OPFLAGS_INTERRUPT_ENABLE   0x8000
#define PXE_OPFLAGS_INTERRUPT_DISABLE  0x4000
#define PXE_OPFLAGS_INTERRUPT_READ     0x0000

///
/// Enable receive interrupts.  An external interrupt will be generated
/// after a complete non-error packet has been received.
///
#define PXE_OPFLAGS_INTERRUPT_RECEIVE  0x0001

///
/// Enable transmit interrupts.  An external interrupt will be generated
/// after a complete non-error packet has been transmitted.
///
#define PXE_OPFLAGS_INTERRUPT_TRANSMIT  0x0002

///
/// Enable command interrupts.  An external interrupt will be generated
/// when command execution stops.
///
#define PXE_OPFLAGS_INTERRUPT_COMMAND  0x0004

///
/// Generate software interrupt.  Setting this bit generates an external
/// interrupt, if it is supported by the hardware.
///
#define PXE_OPFLAGS_INTERRUPT_SOFTWARE  0x0008

///
/// UNDI Receive Filters.
///
///
/// Select whether to enable or disable receive filters.
/// Setting both enable and disable will return PXE_STATCODE_INVALID_OPCODE.
///
#define PXE_OPFLAGS_RECEIVE_FILTER_OPMASK   0xC000
#define PXE_OPFLAGS_RECEIVE_FILTER_ENABLE   0x8000
#define PXE_OPFLAGS_RECEIVE_FILTER_DISABLE  0x4000
#define PXE_OPFLAGS_RECEIVE_FILTER_READ     0x0000

///
/// To reset the contents of the multicast MAC address filter list,
/// set this OpFlag:
///
#define PXE_OPFLAGS_RECEIVE_FILTER_RESET_MCAST_LIST  0x2000

///
/// Enable unicast packet receiving.  Packets sent to the current station
/// MAC address will be received.
///
#define PXE_OPFLAGS_RECEIVE_FILTER_UNICAST  0x0001

///
/// Enable broadcast packet receiving.  Packets sent to the broadcast
/// MAC address will be received.
///
#define PXE_OPFLAGS_RECEIVE_FILTER_BROADCAST  0x0002

///
/// Enable filtered multicast packet receiving.  Packets sent to any
/// of the multicast MAC addresses in the multicast MAC address filter
/// list will be received.  If the filter list is empty, no multicast
///
#define PXE_OPFLAGS_RECEIVE_FILTER_FILTERED_MULTICAST  0x0004

///
/// Enable promiscuous packet receiving.  All packets will be received.
///
#define PXE_OPFLAGS_RECEIVE_FILTER_PROMISCUOUS  0x0008

///
/// Enable promiscuous multicast packet receiving.  All multicast
/// packets will be received.
///
#define PXE_OPFLAGS_RECEIVE_FILTER_ALL_MULTICAST  0x0010

///
/// UNDI Station Address.
///
#define PXE_OPFLAGS_STATION_ADDRESS_READ   0x0000
#define PXE_OPFLAGS_STATION_ADDRESS_WRITE  0x0000
#define PXE_OPFLAGS_STATION_ADDRESS_RESET  0x0001

///
/// UNDI Statistics.
///
#define PXE_OPFLAGS_STATISTICS_READ   0x0000
#define PXE_OPFLAGS_STATISTICS_RESET  0x0001

///
/// UNDI MCast IP to MAC.
///
///
/// Identify the type of IP address in the CPB.
///
#define PXE_OPFLAGS_MCAST_IP_TO_MAC_OPMASK  0x0003
#define PXE_OPFLAGS_MCAST_IPV4_TO_MAC       0x0000
#define PXE_OPFLAGS_MCAST_IPV6_TO_MAC       0x0001

///
/// UNDI NvData.
///
///
/// Select the type of non-volatile data operation.
///
#define PXE_OPFLAGS_NVDATA_OPMASK  0x0001
#define PXE_OPFLAGS_NVDATA_READ    0x0000
#define PXE_OPFLAGS_NVDATA_WRITE   0x0001

///
/// UNDI Get Status.
///
///
/// Return current interrupt status.  This will also clear any interrupts
/// that are currently set.  This can be used in a polling routine.  The
/// interrupt flags are still set and cleared even when the interrupts
/// are disabled.
///
#define PXE_OPFLAGS_GET_INTERRUPT_STATUS  0x0001

///
/// Return list of transmitted buffers for recycling.  Transmit buffers
/// must not be changed or unallocated until they have recycled.  After
/// issuing a transmit command, wait for a transmit complete interrupt.
/// When a transmit complete interrupt is received, read the transmitted
/// buffers.  Do not plan on getting one buffer per interrupt.  Some
/// NICs and UNDIs may transmit multiple buffers per interrupt.
///
#define PXE_OPFLAGS_GET_TRANSMITTED_BUFFERS  0x0002

///
/// Return current media status.
///
#define PXE_OPFLAGS_GET_MEDIA_STATUS  0x0004

///
/// UNDI Fill Header.
///
#define PXE_OPFLAGS_FILL_HEADER_OPMASK      0x0001
#define PXE_OPFLAGS_FILL_HEADER_FRAGMENTED  0x0001
#define PXE_OPFLAGS_FILL_HEADER_WHOLE       0x0000

///
/// UNDI Transmit.
///
///
/// S/W UNDI only.  Return after the packet has been transmitted.  A
/// transmit complete interrupt will still be generated and the transmit
/// buffer will have to be recycled.
///
#define PXE_OPFLAGS_SWUNDI_TRANSMIT_OPMASK  0x0001
#define PXE_OPFLAGS_TRANSMIT_BLOCK          0x0001
#define PXE_OPFLAGS_TRANSMIT_DONT_BLOCK     0x0000

#define PXE_OPFLAGS_TRANSMIT_OPMASK      0x0002
#define PXE_OPFLAGS_TRANSMIT_FRAGMENTED  0x0002
#define PXE_OPFLAGS_TRANSMIT_WHOLE       0x0000

///
/// UNDI Receive.
///
/// No OpFlags.
///

///
/// PXE STATFLAGS.
///
typedef PXE_UINT16 PXE_STATFLAGS;

#define PXE_STATFLAGS_INITIALIZE  0x0000

///
/// Common StatFlags that can be returned by all commands.
///
///
/// The COMMAND_COMPLETE and COMMAND_FAILED status flags must be
/// implemented by all UNDIs.  COMMAND_QUEUED is only needed by UNDIs
/// that support command queuing.
///
#define PXE_STATFLAGS_STATUS_MASK       0xC000
#define PXE_STATFLAGS_COMMAND_COMPLETE  0xC000
#define PXE_STATFLAGS_COMMAND_FAILED    0x8000
#define PXE_STATFLAGS_COMMAND_QUEUED    0x4000

///
/// UNDI Get State.
///
#define PXE_STATFLAGS_GET_STATE_MASK         0x0003
#define PXE_STATFLAGS_GET_STATE_INITIALIZED  0x0002
#define PXE_STATFLAGS_GET_STATE_STARTED      0x0001
#define PXE_STATFLAGS_GET_STATE_STOPPED      0x0000

///
/// UNDI Start.
///
/// No additional StatFlags.
///

///
/// UNDI Get Init Info.
///
#define PXE_STATFLAGS_CABLE_DETECT_MASK           0x0001
#define PXE_STATFLAGS_CABLE_DETECT_NOT_SUPPORTED  0x0000
#define PXE_STATFLAGS_CABLE_DETECT_SUPPORTED      0x0001

#define PXE_STATFLAGS_GET_STATUS_NO_MEDIA_MASK           0x0002
#define PXE_STATFLAGS_GET_STATUS_NO_MEDIA_NOT_SUPPORTED  0x0000
#define PXE_STATFLAGS_GET_STATUS_NO_MEDIA_SUPPORTED      0x0002

///
/// UNDI Initialize.
///
#define PXE_STATFLAGS_INITIALIZED_NO_MEDIA  0x0001

///
/// UNDI Reset.
///
#define PXE_STATFLAGS_RESET_NO_MEDIA  0x0001

///
/// UNDI Shutdown.
///
/// No additional StatFlags.

///
/// UNDI Interrupt Enables.
///
///
/// If set, receive interrupts are enabled.
///
#define PXE_STATFLAGS_INTERRUPT_RECEIVE  0x0001

///
/// If set, transmit interrupts are enabled.
///
#define PXE_STATFLAGS_INTERRUPT_TRANSMIT  0x0002

///
/// If set, command interrupts are enabled.
///
#define PXE_STATFLAGS_INTERRUPT_COMMAND  0x0004

///
/// UNDI Receive Filters.
///

///
/// If set, unicast packets will be received.
///
#define PXE_STATFLAGS_RECEIVE_FILTER_UNICAST  0x0001

///
/// If set, broadcast packets will be received.
///
#define PXE_STATFLAGS_RECEIVE_FILTER_BROADCAST  0x0002

///
/// If set, multicast packets that match up with the multicast address
/// filter list will be received.
///
#define PXE_STATFLAGS_RECEIVE_FILTER_FILTERED_MULTICAST  0x0004

///
/// If set, all packets will be received.
///
#define PXE_STATFLAGS_RECEIVE_FILTER_PROMISCUOUS  0x0008

///
/// If set, all multicast packets will be received.
///
#define PXE_STATFLAGS_RECEIVE_FILTER_ALL_MULTICAST  0x0010

///
/// UNDI Station Address.
///
/// No additional StatFlags.
///

///
/// UNDI Statistics.
///
/// No additional StatFlags.
///

///
//// UNDI MCast IP to MAC.
////
//// No additional StatFlags.

///
/// UNDI NvData.
///
/// No additional StatFlags.
///

///
/// UNDI Get Status.
///

///
/// Use to determine if an interrupt has occurred.
///
#define PXE_STATFLAGS_GET_STATUS_INTERRUPT_MASK  0x000F
#define PXE_STATFLAGS_GET_STATUS_NO_INTERRUPTS   0x0000

///
/// If set, at least one receive interrupt occurred.
///
#define PXE_STATFLAGS_GET_STATUS_RECEIVE  0x0001

///
/// If set, at least one transmit interrupt occurred.
///
#define PXE_STATFLAGS_GET_STATUS_TRANSMIT  0x0002

///
/// If set, at least one command interrupt occurred.
///
#define PXE_STATFLAGS_GET_STATUS_COMMAND  0x0004

///
/// If set, at least one software interrupt occurred.
///
#define PXE_STATFLAGS_GET_STATUS_SOFTWARE  0x0008

///
/// This flag is set if the transmitted buffer queue is empty.  This flag
/// will be set if all transmitted buffer addresses get written into the DB.
///
#define PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY  0x0010

///
/// This flag is set if no transmitted buffer addresses were written
/// into the DB.  (This could be because DBsize was too small.)
///
#define PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN  0x0020

///
/// This flag is set if there is no media detected.
///
#define PXE_STATFLAGS_GET_STATUS_NO_MEDIA  0x0040

///
/// UNDI Fill Header.
///
/// No additional StatFlags.
///

///
/// UNDI Transmit.
///
/// No additional StatFlags.

///
/// UNDI Receive
/// .

///
/// No additional StatFlags.
///
typedef PXE_UINT16 PXE_STATCODE;

#define PXE_STATCODE_INITIALIZE  0x0000

///
/// Common StatCodes returned by all UNDI commands, UNDI protocol functions
/// and BC protocol functions.
///
#define PXE_STATCODE_SUCCESS  0x0000

#define PXE_STATCODE_INVALID_CDB          0x0001
#define PXE_STATCODE_INVALID_CPB          0x0002
#define PXE_STATCODE_BUSY                 0x0003
#define PXE_STATCODE_QUEUE_FULL           0x0004
#define PXE_STATCODE_ALREADY_STARTED      0x0005
#define PXE_STATCODE_NOT_STARTED          0x0006
#define PXE_STATCODE_NOT_SHUTDOWN         0x0007
#define PXE_STATCODE_ALREADY_INITIALIZED  0x0008
#define PXE_STATCODE_NOT_INITIALIZED      0x0009
#define PXE_STATCODE_DEVICE_FAILURE       0x000A
#define PXE_STATCODE_NVDATA_FAILURE       0x000B
#define PXE_STATCODE_UNSUPPORTED          0x000C
#define PXE_STATCODE_BUFFER_FULL          0x000D
#define PXE_STATCODE_INVALID_PARAMETER    0x000E
#define PXE_STATCODE_INVALID_UNDI         0x000F
#define PXE_STATCODE_IPV4_NOT_SUPPORTED   0x0010
#define PXE_STATCODE_IPV6_NOT_SUPPORTED   0x0011
#define PXE_STATCODE_NOT_ENOUGH_MEMORY    0x0012
#define PXE_STATCODE_NO_DATA              0x0013

typedef PXE_UINT16 PXE_IFNUM;

///
/// This interface number must be passed to the S/W UNDI Start command.
///
#define PXE_IFNUM_START  0x0000

///
/// This interface number is returned by the S/W UNDI Get State and
/// Start commands if information in the CDB, CPB or DB is invalid.
///
#define PXE_IFNUM_INVALID  0x0000

typedef PXE_UINT16 PXE_CONTROL;

///
/// Setting this flag directs the UNDI to queue this command for later
/// execution if the UNDI is busy and it supports command queuing.
/// If queuing is not supported, a PXE_STATCODE_INVALID_CONTROL error
/// is returned.  If the queue is full, a PXE_STATCODE_CDB_QUEUE_FULL
/// error is returned.
///
#define PXE_CONTROL_QUEUE_IF_BUSY  0x0002

///
/// These two bit values are used to determine if there are more UNDI
/// CDB structures following this one.  If the link bit is set, there
/// must be a CDB structure following this one.  Execution will start
/// on the next CDB structure as soon as this one completes successfully.
/// If an error is generated by this command, execution will stop.
///
#define PXE_CONTROL_LINK              0x0001
#define PXE_CONTROL_LAST_CDB_IN_LIST  0x0000

typedef PXE_UINT8 PXE_FRAME_TYPE;

#define PXE_FRAME_TYPE_NONE                   0x00
#define PXE_FRAME_TYPE_UNICAST                0x01
#define PXE_FRAME_TYPE_BROADCAST              0x02
#define PXE_FRAME_TYPE_FILTERED_MULTICAST     0x03
#define PXE_FRAME_TYPE_PROMISCUOUS            0x04
#define PXE_FRAME_TYPE_PROMISCUOUS_MULTICAST  0x05

#define PXE_FRAME_TYPE_MULTICAST  PXE_FRAME_TYPE_FILTERED_MULTICAST

typedef PXE_UINT32 PXE_IPV4;

typedef PXE_UINT32 PXE_IPV6[4];
#define PXE_MAC_LENGTH  32

typedef PXE_UINT8 PXE_MAC_ADDR[PXE_MAC_LENGTH];

typedef PXE_UINT8 PXE_IFTYPE;
typedef UINT16    PXE_MEDIA_PROTOCOL;

///
/// This information is from the ARP section of RFC 1700.
///
///     1 Ethernet (10Mb)                                    [JBP]
///     2 Experimental Ethernet (3Mb)                        [JBP]
///     3 Amateur Radio AX.25                                [PXK]
///     4 Proteon ProNET Token Ring                          [JBP]
///     5 Chaos                                              [GXP]
///     6 IEEE 802 Networks                                  [JBP]
///     7 ARCNET                                             [JBP]
///     8 Hyperchannel                                       [JBP]
///     9 Lanstar                                             [TU]
///    10 Autonet Short Address                             [MXB1]
///    11 LocalTalk                                         [JKR1]
///    12 LocalNet (IBM* PCNet or SYTEK* LocalNET)           [JXM]
///    13 Ultra link                                        [RXD2]
///    14 SMDS                                              [GXC1]
///    15 Frame Relay                                        [AGM]
///    16 Asynchronous Transmission Mode (ATM)              [JXB2]
///    17 HDLC                                               [JBP]
///    18 Fibre Channel                            [Yakov Rekhter]
///    19 Asynchronous Transmission Mode (ATM)      [Mark Laubach]
///    20 Serial Line                                        [JBP]
///    21 Asynchronous Transmission Mode (ATM)              [MXB1]
///
/// * Other names and brands may be claimed as the property of others.
///
#define PXE_IFTYPE_ETHERNET       0x01
#define PXE_IFTYPE_TOKENRING      0x04
#define PXE_IFTYPE_FIBRE_CHANNEL  0x12

typedef struct s_pxe_hw_undi {
  PXE_UINT32    Signature;      ///< PXE_ROMID_SIGNATURE.
  PXE_UINT8     Len;            ///< sizeof(PXE_HW_UNDI).
  PXE_UINT8     Fudge;          ///< makes 8-bit cksum equal zero.
  PXE_UINT8     Rev;            ///< PXE_ROMID_REV.
  PXE_UINT8     IFcnt;          ///< physical connector count lower byte.
  PXE_UINT8     MajorVer;       ///< PXE_ROMID_MAJORVER.
  PXE_UINT8     MinorVer;       ///< PXE_ROMID_MINORVER.
  PXE_UINT8     IFcntExt;       ///< physical connector count upper byte.
  PXE_UINT8     reserved;       ///< zero, not used.
  PXE_UINT32    Implementation; ///< implementation flags.
  ///< reserved             ///< vendor use.
  ///< UINT32 Status;       ///< status port.
  ///< UINT32 Command;      ///< command port.
  ///< UINT64 CDBaddr;      ///< CDB address port.
  ///<
} PXE_HW_UNDI;

///
/// Status port bit definitions.
///

///
/// UNDI operation state.
///
#define PXE_HWSTAT_STATE_MASK   0xC0000000
#define PXE_HWSTAT_BUSY         0xC0000000
#define PXE_HWSTAT_INITIALIZED  0x80000000
#define PXE_HWSTAT_STARTED      0x40000000
#define PXE_HWSTAT_STOPPED      0x00000000

///
/// If set, last command failed.
///
#define PXE_HWSTAT_COMMAND_FAILED  0x20000000

///
/// If set, identifies enabled receive filters.
///
#define PXE_HWSTAT_PROMISCUOUS_MULTICAST_RX_ENABLED  0x00001000
#define PXE_HWSTAT_PROMISCUOUS_RX_ENABLED            0x00000800
#define PXE_HWSTAT_BROADCAST_RX_ENABLED              0x00000400
#define PXE_HWSTAT_MULTICAST_RX_ENABLED              0x00000200
#define PXE_HWSTAT_UNICAST_RX_ENABLED                0x00000100

///
/// If set, identifies enabled external interrupts.
///
#define PXE_HWSTAT_SOFTWARE_INT_ENABLED      0x00000080
#define PXE_HWSTAT_TX_COMPLETE_INT_ENABLED   0x00000040
#define PXE_HWSTAT_PACKET_RX_INT_ENABLED     0x00000020
#define PXE_HWSTAT_CMD_COMPLETE_INT_ENABLED  0x00000010

///
/// If set, identifies pending interrupts.
///
#define PXE_HWSTAT_SOFTWARE_INT_PENDING      0x00000008
#define PXE_HWSTAT_TX_COMPLETE_INT_PENDING   0x00000004
#define PXE_HWSTAT_PACKET_RX_INT_PENDING     0x00000002
#define PXE_HWSTAT_CMD_COMPLETE_INT_PENDING  0x00000001

///
/// Command port definitions.
///

///
/// If set, CDB identified in CDBaddr port is given to UNDI.
/// If not set, other bits in this word will be processed.
///
#define PXE_HWCMD_ISSUE_COMMAND   0x80000000
#define PXE_HWCMD_INTS_AND_FILTS  0x00000000

///
/// Use these to enable/disable receive filters.
///
#define PXE_HWCMD_PROMISCUOUS_MULTICAST_RX_ENABLE  0x00001000
#define PXE_HWCMD_PROMISCUOUS_RX_ENABLE            0x00000800
#define PXE_HWCMD_BROADCAST_RX_ENABLE              0x00000400
#define PXE_HWCMD_MULTICAST_RX_ENABLE              0x00000200
#define PXE_HWCMD_UNICAST_RX_ENABLE                0x00000100

///
/// Use these to enable/disable external interrupts.
///
#define PXE_HWCMD_SOFTWARE_INT_ENABLE      0x00000080
#define PXE_HWCMD_TX_COMPLETE_INT_ENABLE   0x00000040
#define PXE_HWCMD_PACKET_RX_INT_ENABLE     0x00000020
#define PXE_HWCMD_CMD_COMPLETE_INT_ENABLE  0x00000010

///
/// Use these to clear pending external interrupts.
///
#define PXE_HWCMD_CLEAR_SOFTWARE_INT      0x00000008
#define PXE_HWCMD_CLEAR_TX_COMPLETE_INT   0x00000004
#define PXE_HWCMD_CLEAR_PACKET_RX_INT     0x00000002
#define PXE_HWCMD_CLEAR_CMD_COMPLETE_INT  0x00000001

typedef struct s_pxe_sw_undi {
  PXE_UINT32    Signature;      ///< PXE_ROMID_SIGNATURE.
  PXE_UINT8     Len;            ///< sizeof(PXE_SW_UNDI).
  PXE_UINT8     Fudge;          ///< makes 8-bit cksum zero.
  PXE_UINT8     Rev;            ///< PXE_ROMID_REV.
  PXE_UINT8     IFcnt;          ///< physical connector count lower byte.
  PXE_UINT8     MajorVer;       ///< PXE_ROMID_MAJORVER.
  PXE_UINT8     MinorVer;       ///< PXE_ROMID_MINORVER.
  PXE_UINT8     IFcntExt;       ///< physical connector count upper byte.
  PXE_UINT8     reserved1;      ///< zero, not used.
  PXE_UINT32    Implementation; ///< Implementation flags.
  PXE_UINT64    EntryPoint;     ///< API entry point.
  PXE_UINT8     reserved2[3];   ///< zero, not used.
  PXE_UINT8     BusCnt;         ///< number of bustypes supported.
  PXE_UINT32    BusType[1];     ///< list of supported bustypes.
} PXE_SW_UNDI;

typedef union u_pxe_undi {
  PXE_HW_UNDI    hw;
  PXE_SW_UNDI    sw;
} PXE_UNDI;

///
/// Signature of !PXE structure.
///
#define PXE_ROMID_SIGNATURE  PXE_BUSTYPE ('!', 'P', 'X', 'E')

///
/// !PXE structure format revision
/// .
#define PXE_ROMID_REV  0x02

///
/// UNDI command interface revision.  These are the values that get sent
/// in option 94 (Client Network Interface Identifier) in the DHCP Discover
/// and PXE Boot Server Request packets.
///
#define PXE_ROMID_MAJORVER  0x03
#define PXE_ROMID_MINORVER  0x01

///
/// Implementation flags.
///
#define PXE_ROMID_IMP_HW_UNDI                             0x80000000
#define PXE_ROMID_IMP_SW_VIRT_ADDR                        0x40000000
#define PXE_ROMID_IMP_64BIT_DEVICE                        0x00010000
#define PXE_ROMID_IMP_FRAG_SUPPORTED                      0x00008000
#define PXE_ROMID_IMP_CMD_LINK_SUPPORTED                  0x00004000
#define PXE_ROMID_IMP_CMD_QUEUE_SUPPORTED                 0x00002000
#define PXE_ROMID_IMP_MULTI_FRAME_SUPPORTED               0x00001000
#define PXE_ROMID_IMP_NVDATA_SUPPORT_MASK                 0x00000C00
#define PXE_ROMID_IMP_NVDATA_BULK_WRITABLE                0x00000C00
#define PXE_ROMID_IMP_NVDATA_SPARSE_WRITABLE              0x00000800
#define PXE_ROMID_IMP_NVDATA_READ_ONLY                    0x00000400
#define PXE_ROMID_IMP_NVDATA_NOT_AVAILABLE                0x00000000
#define PXE_ROMID_IMP_STATISTICS_SUPPORTED                0x00000200
#define PXE_ROMID_IMP_STATION_ADDR_SETTABLE               0x00000100
#define PXE_ROMID_IMP_PROMISCUOUS_MULTICAST_RX_SUPPORTED  0x00000080
#define PXE_ROMID_IMP_PROMISCUOUS_RX_SUPPORTED            0x00000040
#define PXE_ROMID_IMP_BROADCAST_RX_SUPPORTED              0x00000020
#define PXE_ROMID_IMP_FILTERED_MULTICAST_RX_SUPPORTED     0x00000010
#define PXE_ROMID_IMP_SOFTWARE_INT_SUPPORTED              0x00000008
#define PXE_ROMID_IMP_TX_COMPLETE_INT_SUPPORTED           0x00000004
#define PXE_ROMID_IMP_PACKET_RX_INT_SUPPORTED             0x00000002
#define PXE_ROMID_IMP_CMD_COMPLETE_INT_SUPPORTED          0x00000001

typedef struct s_pxe_cdb {
  PXE_OPCODE       OpCode;
  PXE_OPFLAGS      OpFlags;
  PXE_UINT16       CPBsize;
  PXE_UINT16       DBsize;
  PXE_UINT64       CPBaddr;
  PXE_UINT64       DBaddr;
  PXE_STATCODE     StatCode;
  PXE_STATFLAGS    StatFlags;
  PXE_UINT16       IFnum;
  PXE_CONTROL      Control;
} PXE_CDB;

typedef union u_pxe_ip_addr {
  PXE_IPV6    IPv6;
  PXE_IPV4    IPv4;
} PXE_IP_ADDR;

typedef union pxe_device {
  ///
  /// PCI and PC Card NICs are both identified using bus, device
  /// and function numbers.  For PC Card, this may require PC
  /// Card services to be loaded in the BIOS or preboot
  /// environment.
  ///
  struct {
    ///
    /// See S/W UNDI ROMID structure definition for PCI and
    /// PCC BusType definitions.
    ///
    PXE_UINT32    BusType;

    ///
    /// Bus, device & function numbers that locate this device.
    ///
    PXE_UINT16    Bus;
    PXE_UINT8     Device;
    PXE_UINT8     Function;
  } PCI, PCC;
} PXE_DEVICE;

///
/// cpb and db definitions
///
#define MAX_PCI_CONFIG_LEN     64  ///< # of dwords.
#define MAX_EEPROM_LEN         128 ///< # of dwords.
#define MAX_XMIT_BUFFERS       32  ///< recycling Q length for xmit_done.
#define MAX_MCAST_ADDRESS_CNT  8

typedef struct s_pxe_cpb_start_30 {
  ///
  /// PXE_VOID Delay(UINTN microseconds);
  ///
  /// UNDI will never request a delay smaller than 10 microseconds
  /// and will always request delays in increments of 10 microseconds.
  /// The Delay() CallBack routine must delay between n and n + 10
  /// microseconds before returning control to the UNDI.
  ///
  /// This field cannot be set to zero.
  ///
  UINT64    Delay;

  ///
  /// PXE_VOID Block(UINT32 enable);
  ///
  /// UNDI may need to block multi-threaded/multi-processor access to
  /// critical code sections when programming or accessing the network
  /// device.  To this end, a blocking service is needed by the UNDI.
  /// When UNDI needs a block, it will call Block() passing a non-zero
  /// value.  When UNDI no longer needs a block, it will call Block()
  /// with a zero value.  When called, if the Block() is already enabled,
  /// do not return control to the UNDI until the previous Block() is
  /// disabled.
  ///
  /// This field cannot be set to zero.
  ///
  UINT64    Block;

  ///
  /// PXE_VOID Virt2Phys(UINT64 virtual, UINT64 physical_ptr);
  ///
  /// UNDI will pass the virtual address of a buffer and the virtual
  /// address of a 64-bit physical buffer.  Convert the virtual address
  /// to a physical address and write the result to the physical address
  /// buffer.  If virtual and physical addresses are the same, just
  /// copy the virtual address to the physical address buffer.
  ///
  /// This field can be set to zero if virtual and physical addresses
  /// are equal.
  ///
  UINT64    Virt2Phys;
  ///
  /// PXE_VOID Mem_IO(UINT8 read_write, UINT8 len, UINT64 port,
  ///              UINT64 buf_addr);
  ///
  /// UNDI will read or write the device io space using this call back
  /// function. It passes the number of bytes as the len parameter and it
  /// will be either 1,2,4 or 8.
  ///
  /// This field can not be set to zero.
  ///
  UINT64    Mem_IO;
} PXE_CPB_START_30;

typedef struct s_pxe_cpb_start_31 {
  ///
  /// PXE_VOID Delay(UINT64 UnqId, UINTN microseconds);
  ///
  /// UNDI will never request a delay smaller than 10 microseconds
  /// and will always request delays in increments of 10 microseconds.
  /// The Delay() CallBack routine must delay between n and n + 10
  /// microseconds before returning control to the UNDI.
  ///
  /// This field cannot be set to zero.
  ///
  UINT64    Delay;

  ///
  /// PXE_VOID Block(UINT64 unq_id, UINT32 enable);
  ///
  /// UNDI may need to block multi-threaded/multi-processor access to
  /// critical code sections when programming or accessing the network
  /// device.  To this end, a blocking service is needed by the UNDI.
  /// When UNDI needs a block, it will call Block() passing a non-zero
  /// value.  When UNDI no longer needs a block, it will call Block()
  /// with a zero value.  When called, if the Block() is already enabled,
  /// do not return control to the UNDI until the previous Block() is
  /// disabled.
  ///
  /// This field cannot be set to zero.
  ///
  UINT64    Block;

  ///
  /// PXE_VOID Virt2Phys(UINT64 UnqId, UINT64 virtual, UINT64 physical_ptr);
  ///
  /// UNDI will pass the virtual address of a buffer and the virtual
  /// address of a 64-bit physical buffer.  Convert the virtual address
  /// to a physical address and write the result to the physical address
  /// buffer.  If virtual and physical addresses are the same, just
  /// copy the virtual address to the physical address buffer.
  ///
  /// This field can be set to zero if virtual and physical addresses
  /// are equal.
  ///
  UINT64    Virt2Phys;
  ///
  /// PXE_VOID Mem_IO(UINT64 UnqId, UINT8 read_write, UINT8 len, UINT64 port,
  ///              UINT64 buf_addr);
  ///
  /// UNDI will read or write the device io space using this call back
  /// function. It passes the number of bytes as the len parameter and it
  /// will be either 1,2,4 or 8.
  ///
  /// This field can not be set to zero.
  ///
  UINT64    Mem_IO;
  ///
  /// PXE_VOID Map_Mem(UINT64 unq_id, UINT64 virtual_addr, UINT32 size,
  ///                 UINT32 Direction, UINT64 mapped_addr);
  ///
  /// UNDI will pass the virtual address of a buffer, direction of the data
  /// flow from/to the mapped buffer (the constants are defined below)
  /// and a place holder (pointer) for the mapped address.
  /// This call will Map the given address to a physical DMA address and write
  /// the result to the mapped_addr pointer.  If there is no need to
  /// map the given address to a lower address (i.e. the given address is
  /// associated with a physical address that is already compatible to be
  /// used with the DMA, it converts the given virtual address to it's
  /// physical address and write that in the mapped address pointer.
  ///
  /// This field can be set to zero if there is no mapping service available.
  ///
  UINT64    Map_Mem;

  ///
  /// PXE_VOID UnMap_Mem(UINT64 unq_id, UINT64 virtual_addr, UINT32 size,
  ///            UINT32 Direction, UINT64 mapped_addr);
  ///
  /// UNDI will pass the virtual and mapped addresses of a buffer.
  /// This call will un map the given address.
  ///
  /// This field can be set to zero if there is no unmapping service available.
  ///
  UINT64    UnMap_Mem;

  ///
  /// PXE_VOID Sync_Mem(UINT64 unq_id, UINT64 virtual,
  ///            UINT32 size, UINT32 Direction, UINT64 mapped_addr);
  ///
  /// UNDI will pass the virtual and mapped addresses of a buffer.
  /// This call will synchronize the contents of both the virtual and mapped.
  /// buffers for the given Direction.
  ///
  /// This field can be set to zero if there is no service available.
  ///
  UINT64    Sync_Mem;

  ///
  /// protocol driver can provide anything for this Unique_ID, UNDI remembers
  /// that as just a 64bit value associated to the interface specified by
  /// the ifnum and gives it back as a parameter to all the call-back routines
  /// when calling for that interface!
  ///
  UINT64    Unique_ID;
} PXE_CPB_START_31;

#define TO_AND_FROM_DEVICE  0
#define FROM_DEVICE         1
#define TO_DEVICE           2

#define PXE_DELAY_MILLISECOND  1000
#define PXE_DELAY_SECOND       1000000
#define PXE_IO_READ            0
#define PXE_IO_WRITE           1
#define PXE_MEM_READ           2
#define PXE_MEM_WRITE          4

typedef struct s_pxe_db_get_init_info {
  ///
  /// Minimum length of locked memory buffer that must be given to
  /// the Initialize command. Giving UNDI more memory will generally
  /// give better performance.
  ///
  /// If MemoryRequired is zero, the UNDI does not need and will not
  /// use system memory to receive and transmit packets.
  ///
  PXE_UINT32    MemoryRequired;

  ///
  /// Maximum frame data length for Tx/Rx excluding the media header.
  ///
  PXE_UINT32    FrameDataLen;

  ///
  /// Supported link speeds are in units of mega bits.  Common ethernet
  /// values are 10, 100 and 1000.  Unused LinkSpeeds[] entries are zero
  /// filled.
  ///
  PXE_UINT32    LinkSpeeds[4];

  ///
  /// Number of non-volatile storage items.
  ///
  PXE_UINT32    NvCount;

  ///
  /// Width of non-volatile storage item in bytes.  0, 1, 2 or 4
  ///
  PXE_UINT16    NvWidth;

  ///
  /// Media header length.  This is the typical media header length for
  /// this UNDI.  This information is needed when allocating receive
  /// and transmit buffers.
  ///
  PXE_UINT16    MediaHeaderLen;

  ///
  /// Number of bytes in the NIC hardware (MAC) address.
  ///
  PXE_UINT16    HWaddrLen;

  ///
  /// Maximum number of multicast MAC addresses in the multicast
  /// MAC address filter list.
  ///
  PXE_UINT16    MCastFilterCnt;

  ///
  /// Default number and size of transmit and receive buffers that will
  /// be allocated by the UNDI.  If MemoryRequired is non-zero, this
  /// allocation will come out of the memory buffer given to the Initialize
  /// command.  If MemoryRequired is zero, this allocation will come out of
  /// memory on the NIC.
  ///
  PXE_UINT16    TxBufCnt;
  PXE_UINT16    TxBufSize;
  PXE_UINT16    RxBufCnt;
  PXE_UINT16    RxBufSize;

  ///
  /// Hardware interface types defined in the Assigned Numbers RFC
  /// and used in DHCP and ARP packets.
  /// See the PXE_IFTYPE typedef and PXE_IFTYPE_xxx macros.
  ///
  PXE_UINT8     IFtype;

  ///
  /// Supported duplex.  See PXE_DUPLEX_xxxxx #defines below.
  ///
  PXE_UINT8     SupportedDuplexModes;

  ///
  /// Supported loopback options.  See PXE_LOOPBACK_xxxxx #defines below.
  ///
  PXE_UINT8     SupportedLoopBackModes;
} PXE_DB_GET_INIT_INFO;

#define PXE_MAX_TXRX_UNIT_ETHER  1500

#define PXE_HWADDR_LEN_ETHER      0x0006
#define PXE_MAC_HEADER_LEN_ETHER  0x000E

#define PXE_DUPLEX_ENABLE_FULL_SUPPORTED  1
#define PXE_DUPLEX_FORCE_FULL_SUPPORTED   2

#define PXE_LOOPBACK_INTERNAL_SUPPORTED  1
#define PXE_LOOPBACK_EXTERNAL_SUPPORTED  2

typedef struct s_pxe_pci_config_info {
  ///
  /// This is the flag field for the PXE_DB_GET_CONFIG_INFO union.
  /// For PCI bus devices, this field is set to PXE_BUSTYPE_PCI.
  ///
  UINT32    BusType;

  ///
  /// This identifies the PCI network device that this UNDI interface.
  /// is bound to.
  ///
  UINT16    Bus;
  UINT8     Device;
  UINT8     Function;

  ///
  /// This is a copy of the PCI configuration space for this
  /// network device.
  ///
  union {
    UINT8     Byte[256];
    UINT16    Word[128];
    UINT32    Dword[64];
  } Config;
} PXE_PCI_CONFIG_INFO;

typedef struct s_pxe_pcc_config_info {
  ///
  /// This is the flag field for the PXE_DB_GET_CONFIG_INFO union.
  /// For PCC bus devices, this field is set to PXE_BUSTYPE_PCC.
  ///
  PXE_UINT32    BusType;

  ///
  /// This identifies the PCC network device that this UNDI interface
  /// is bound to.
  ///
  PXE_UINT16    Bus;
  PXE_UINT8     Device;
  PXE_UINT8     Function;

  ///
  /// This is a copy of the PCC configuration space for this
  /// network device.
  ///
  union {
    PXE_UINT8     Byte[256];
    PXE_UINT16    Word[128];
    PXE_UINT32    Dword[64];
  } Config;
} PXE_PCC_CONFIG_INFO;

typedef union u_pxe_db_get_config_info {
  PXE_PCI_CONFIG_INFO    pci;
  PXE_PCC_CONFIG_INFO    pcc;
} PXE_DB_GET_CONFIG_INFO;

typedef struct s_pxe_cpb_initialize {
  ///
  /// Address of first (lowest) byte of the memory buffer.  This buffer must
  /// be in contiguous physical memory and cannot be swapped out.  The UNDI
  /// will be using this for transmit and receive buffering.
  ///
  PXE_UINT64    MemoryAddr;

  ///
  /// MemoryLength must be greater than or equal to MemoryRequired
  /// returned by the Get Init Info command.
  ///
  PXE_UINT32    MemoryLength;

  ///
  /// Desired link speed in Mbit/sec.  Common ethernet values are 10, 100
  /// and 1000.  Setting a value of zero will auto-detect and/or use the
  /// default link speed (operation depends on UNDI/NIC functionality).
  ///
  PXE_UINT32    LinkSpeed;

  ///
  /// Suggested number and size of receive and transmit buffers to
  /// allocate.  If MemoryAddr and MemoryLength are non-zero, this
  /// allocation comes out of the supplied memory buffer.  If MemoryAddr
  /// and MemoryLength are zero, this allocation comes out of memory
  /// on the NIC.
  ///
  /// If these fields are set to zero, the UNDI will allocate buffer
  /// counts and sizes as it sees fit.
  ///
  PXE_UINT16    TxBufCnt;
  PXE_UINT16    TxBufSize;
  PXE_UINT16    RxBufCnt;
  PXE_UINT16    RxBufSize;

  ///
  /// The following configuration parameters are optional and must be zero
  /// to use the default values.
  ///
  PXE_UINT8     DuplexMode;

  PXE_UINT8     LoopBackMode;
} PXE_CPB_INITIALIZE;

#define PXE_DUPLEX_DEFAULT       0x00
#define PXE_FORCE_FULL_DUPLEX    0x01
#define PXE_ENABLE_FULL_DUPLEX   0x02
#define PXE_FORCE_HALF_DUPLEX    0x04
#define PXE_DISABLE_FULL_DUPLEX  0x08

#define LOOPBACK_NORMAL    0
#define LOOPBACK_INTERNAL  1
#define LOOPBACK_EXTERNAL  2

typedef struct s_pxe_db_initialize {
  ///
  /// Actual amount of memory used from the supplied memory buffer.  This
  /// may be less that the amount of memory suppllied and may be zero if
  /// the UNDI and network device do not use external memory buffers.
  ///
  /// Memory used by the UNDI and network device is allocated from the
  /// lowest memory buffer address.
  ///
  PXE_UINT32    MemoryUsed;

  ///
  /// Actual number and size of receive and transmit buffers that were
  /// allocated.
  ///
  PXE_UINT16    TxBufCnt;
  PXE_UINT16    TxBufSize;
  PXE_UINT16    RxBufCnt;
  PXE_UINT16    RxBufSize;
} PXE_DB_INITIALIZE;

typedef struct s_pxe_cpb_receive_filters {
  ///
  /// List of multicast MAC addresses.  This list, if present, will
  /// replace the existing multicast MAC address filter list.
  ///
  PXE_MAC_ADDR    MCastList[MAX_MCAST_ADDRESS_CNT];
} PXE_CPB_RECEIVE_FILTERS;

typedef struct s_pxe_db_receive_filters {
  ///
  /// Filtered multicast MAC address list.
  ///
  PXE_MAC_ADDR    MCastList[MAX_MCAST_ADDRESS_CNT];
} PXE_DB_RECEIVE_FILTERS;

typedef struct s_pxe_cpb_station_address {
  ///
  /// If supplied and supported, the current station MAC address
  /// will be changed.
  ///
  PXE_MAC_ADDR    StationAddr;
} PXE_CPB_STATION_ADDRESS;

typedef struct s_pxe_dpb_station_address {
  ///
  /// Current station MAC address.
  ///
  PXE_MAC_ADDR    StationAddr;

  ///
  /// Station broadcast MAC address.
  ///
  PXE_MAC_ADDR    BroadcastAddr;

  ///
  /// Permanent station MAC address.
  ///
  PXE_MAC_ADDR    PermanentAddr;
} PXE_DB_STATION_ADDRESS;

typedef struct s_pxe_db_statistics {
  ///
  /// Bit field identifying what statistic data is collected by the
  /// UNDI/NIC.
  /// If bit 0x00 is set, Data[0x00] is collected.
  /// If bit 0x01 is set, Data[0x01] is collected.
  /// If bit 0x20 is set, Data[0x20] is collected.
  /// If bit 0x21 is set, Data[0x21] is collected.
  /// Etc.
  ///
  PXE_UINT64    Supported;

  ///
  /// Statistic data.
  ///
  PXE_UINT64    Data[64];
} PXE_DB_STATISTICS;

///
/// Total number of frames received.  Includes frames with errors and
/// dropped frames.
///
#define PXE_STATISTICS_RX_TOTAL_FRAMES  0x00

///
/// Number of valid frames received and copied into receive buffers.
///
#define PXE_STATISTICS_RX_GOOD_FRAMES  0x01

///
/// Number of frames below the minimum length for the media.
/// This would be <64 for ethernet.
///
#define PXE_STATISTICS_RX_UNDERSIZE_FRAMES  0x02

///
/// Number of frames longer than the maxminum length for the
/// media.  This would be >1500 for ethernet.
///
#define PXE_STATISTICS_RX_OVERSIZE_FRAMES  0x03

///
/// Valid frames that were dropped because receive buffers were full.
///
#define PXE_STATISTICS_RX_DROPPED_FRAMES  0x04

///
/// Number of valid unicast frames received and not dropped.
///
#define PXE_STATISTICS_RX_UNICAST_FRAMES  0x05

///
/// Number of valid broadcast frames received and not dropped.
///
#define PXE_STATISTICS_RX_BROADCAST_FRAMES  0x06

///
/// Number of valid mutlicast frames received and not dropped.
///
#define PXE_STATISTICS_RX_MULTICAST_FRAMES  0x07

///
/// Number of frames w/ CRC or alignment errors.
///
#define PXE_STATISTICS_RX_CRC_ERROR_FRAMES  0x08

///
/// Total number of bytes received.  Includes frames with errors
/// and dropped frames.
///
#define PXE_STATISTICS_RX_TOTAL_BYTES  0x09

///
/// Transmit statistics.
///
#define PXE_STATISTICS_TX_TOTAL_FRAMES      0x0A
#define PXE_STATISTICS_TX_GOOD_FRAMES       0x0B
#define PXE_STATISTICS_TX_UNDERSIZE_FRAMES  0x0C
#define PXE_STATISTICS_TX_OVERSIZE_FRAMES   0x0D
#define PXE_STATISTICS_TX_DROPPED_FRAMES    0x0E
#define PXE_STATISTICS_TX_UNICAST_FRAMES    0x0F
#define PXE_STATISTICS_TX_BROADCAST_FRAMES  0x10
#define PXE_STATISTICS_TX_MULTICAST_FRAMES  0x11
#define PXE_STATISTICS_TX_CRC_ERROR_FRAMES  0x12
#define PXE_STATISTICS_TX_TOTAL_BYTES       0x13

///
/// Number of collisions detection on this subnet.
///
#define PXE_STATISTICS_COLLISIONS  0x14

///
/// Number of frames destined for unsupported protocol.
///
#define PXE_STATISTICS_UNSUPPORTED_PROTOCOL  0x15

///
/// Number of valid frames received that were duplicated.
///
#define PXE_STATISTICS_RX_DUPLICATED_FRAMES  0x16

///
/// Number of encrypted frames received that failed to decrypt.
///
#define PXE_STATISTICS_RX_DECRYPT_ERROR_FRAMES  0x17

///
/// Number of frames that failed to transmit after exceeding the retry limit.
///
#define PXE_STATISTICS_TX_ERROR_FRAMES  0x18

///
/// Number of frames transmitted successfully after more than one attempt.
///
#define PXE_STATISTICS_TX_RETRY_FRAMES  0x19

typedef struct s_pxe_cpb_mcast_ip_to_mac {
  ///
  /// Multicast IP address to be converted to multicast MAC address.
  ///
  PXE_IP_ADDR    IP;
} PXE_CPB_MCAST_IP_TO_MAC;

typedef struct s_pxe_db_mcast_ip_to_mac {
  ///
  /// Multicast MAC address.
  ///
  PXE_MAC_ADDR    MAC;
} PXE_DB_MCAST_IP_TO_MAC;

typedef struct s_pxe_cpb_nvdata_sparse {
  ///
  /// NvData item list.  Only items in this list will be updated.
  ///
  struct {
    ///
    ///  Non-volatile storage address to be changed.
    ///
    PXE_UINT32    Addr;

    ///
    /// Data item to write into above storage address.
    ///
    union {
      PXE_UINT8     Byte;
      PXE_UINT16    Word;
      PXE_UINT32    Dword;
    } Data;
  } Item[MAX_EEPROM_LEN];
} PXE_CPB_NVDATA_SPARSE;

///
/// When using bulk update, the size of the CPB structure must be
/// the same size as the non-volatile NIC storage.
///
typedef union u_pxe_cpb_nvdata_bulk {
  ///
  /// Array of byte-wide data items.
  ///
  PXE_UINT8     Byte[MAX_EEPROM_LEN << 2];

  ///
  /// Array of word-wide data items.
  ///
  PXE_UINT16    Word[MAX_EEPROM_LEN << 1];

  ///
  /// Array of dword-wide data items.
  ///
  PXE_UINT32    Dword[MAX_EEPROM_LEN];
} PXE_CPB_NVDATA_BULK;

typedef struct s_pxe_db_nvdata {
  ///
  /// Arrays of data items from non-volatile storage.
  ///
  union {
    ///
    /// Array of byte-wide data items.
    ///
    PXE_UINT8     Byte[MAX_EEPROM_LEN << 2];

    ///
    /// Array of word-wide data items.
    ///
    PXE_UINT16    Word[MAX_EEPROM_LEN << 1];

    ///
    /// Array of dword-wide data items.
    ///
    PXE_UINT32    Dword[MAX_EEPROM_LEN];
  } Data;
} PXE_DB_NVDATA;

typedef struct s_pxe_db_get_status {
  ///
  /// Length of next receive frame (header + data).  If this is zero,
  /// there is no next receive frame available.
  ///
  PXE_UINT32    RxFrameLen;

  ///
  /// Reserved, set to zero.
  ///
  PXE_UINT32    reserved;

  ///
  ///  Addresses of transmitted buffers that need to be recycled.
  ///
  PXE_UINT64    TxBuffer[MAX_XMIT_BUFFERS];
} PXE_DB_GET_STATUS;

typedef struct s_pxe_cpb_fill_header {
  ///
  /// Source and destination MAC addresses.  These will be copied into
  /// the media header without doing byte swapping.
  ///
  PXE_MAC_ADDR    SrcAddr;
  PXE_MAC_ADDR    DestAddr;

  ///
  /// Address of first byte of media header.  The first byte of packet data
  /// follows the last byte of the media header.
  ///
  PXE_UINT64      MediaHeader;

  ///
  /// Length of packet data in bytes (not including the media header).
  ///
  PXE_UINT32      PacketLen;

  ///
  /// Protocol type.  This will be copied into the media header without
  /// doing byte swapping.  Protocol type numbers can be obtained from
  /// the Assigned Numbers RFC 1700.
  ///
  PXE_UINT16      Protocol;

  ///
  /// Length of the media header in bytes.
  ///
  PXE_UINT16      MediaHeaderLen;
} PXE_CPB_FILL_HEADER;

#define PXE_PROTOCOL_ETHERNET_IP   0x0800
#define PXE_PROTOCOL_ETHERNET_ARP  0x0806
#define MAX_XMIT_FRAGMENTS         16

typedef struct s_pxe_cpb_fill_header_fragmented {
  ///
  /// Source and destination MAC addresses.  These will be copied into
  /// the media header without doing byte swapping.
  ///
  PXE_MAC_ADDR          SrcAddr;
  PXE_MAC_ADDR          DestAddr;

  ///
  /// Length of packet data in bytes (not including the media header).
  ///
  PXE_UINT32            PacketLen;

  ///
  /// Protocol type.  This will be copied into the media header without
  /// doing byte swapping.  Protocol type numbers can be obtained from
  /// the Assigned Numbers RFC 1700.
  ///
  PXE_MEDIA_PROTOCOL    Protocol;

  ///
  /// Length of the media header in bytes.
  ///
  PXE_UINT16            MediaHeaderLen;

  ///
  /// Number of packet fragment descriptors.
  ///
  PXE_UINT16            FragCnt;

  ///
  /// Reserved, must be set to zero.
  ///
  PXE_UINT16            reserved;

  ///
  /// Array of packet fragment descriptors.  The first byte of the media
  /// header is the first byte of the first fragment.
  ///
  struct {
    ///
    /// Address of this packet fragment.
    ///
    PXE_UINT64    FragAddr;

    ///
    /// Length of this packet fragment.
    ///
    PXE_UINT32    FragLen;

    ///
    /// Reserved, must be set to zero.
    ///
    PXE_UINT32    reserved;
  } FragDesc[MAX_XMIT_FRAGMENTS];
} PXE_CPB_FILL_HEADER_FRAGMENTED;

typedef struct s_pxe_cpb_transmit {
  ///
  /// Address of first byte of frame buffer.  This is also the first byte
  /// of the media header.
  ///
  PXE_UINT64    FrameAddr;

  ///
  /// Length of the data portion of the frame buffer in bytes.  Do not
  /// include the length of the media header.
  ///
  PXE_UINT32    DataLen;

  ///
  /// Length of the media header in bytes.
  ///
  PXE_UINT16    MediaheaderLen;

  ///
  /// Reserved, must be zero.
  ///
  PXE_UINT16    reserved;
} PXE_CPB_TRANSMIT;

typedef struct s_pxe_cpb_transmit_fragments {
  ///
  /// Length of packet data in bytes (not including the media header).
  ///
  PXE_UINT32    FrameLen;

  ///
  /// Length of the media header in bytes.
  ///
  PXE_UINT16    MediaheaderLen;

  ///
  /// Number of packet fragment descriptors.
  ///
  PXE_UINT16    FragCnt;

  ///
  /// Array of frame fragment descriptors.  The first byte of the first
  /// fragment is also the first byte of the media header.
  ///
  struct {
    ///
    /// Address of this frame fragment.
    ///
    PXE_UINT64    FragAddr;

    ///
    /// Length of this frame fragment.
    ///
    PXE_UINT32    FragLen;

    ///
    /// Reserved, must be set to zero.
    ///
    PXE_UINT32    reserved;
  } FragDesc[MAX_XMIT_FRAGMENTS];
} PXE_CPB_TRANSMIT_FRAGMENTS;

typedef struct s_pxe_cpb_receive {
  ///
  /// Address of first byte of receive buffer.  This is also the first byte
  /// of the frame header.
  ///
  PXE_UINT64    BufferAddr;

  ///
  /// Length of receive buffer.  This must be large enough to hold the
  /// received frame (media header + data).  If the length of smaller than
  /// the received frame, data will be lost.
  ///
  PXE_UINT32    BufferLen;

  ///
  /// Reserved, must be set to zero.
  ///
  PXE_UINT32    reserved;
} PXE_CPB_RECEIVE;

typedef struct s_pxe_db_receive {
  ///
  /// Source and destination MAC addresses from media header.
  ///
  PXE_MAC_ADDR          SrcAddr;
  PXE_MAC_ADDR          DestAddr;

  ///
  /// Length of received frame.  May be larger than receive buffer size.
  /// The receive buffer will not be overwritten.  This is how to tell
  /// if data was lost because the receive buffer was too small.
  ///
  PXE_UINT32            FrameLen;

  ///
  /// Protocol type from media header.
  ///
  PXE_MEDIA_PROTOCOL    Protocol;

  ///
  /// Length of media header in received frame.
  ///
  PXE_UINT16            MediaHeaderLen;

  ///
  /// Type of receive frame.
  ///
  PXE_FRAME_TYPE        Type;

  ///
  /// Reserved, must be zero.
  ///
  PXE_UINT8             reserved[7];
} PXE_DB_RECEIVE;

#pragma pack()

#endif