SecurityPkg: SmmTcg2PhysicalPresenceLib: Fix coding style issue

[mirror_edk2.git] / IntelFrameworkModulePkg / Csm / BiosThunk / Snp16Dxe / BiosSnp16.h

/** @file\r
\r
Copyright (c) 1999 - 2010, Intel Corporation. All rights reserved.<BR>\r
\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions\r
of the BSD License which accompanies this distribution.  The\r
full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef _BIOS_SNP_16_H_\r
#define _BIOS_SNP_16_H_\r
\r
#include <Uefi.h>\r
\r
#include <Protocol/LegacyBios.h>\r
#include <Protocol/SimpleNetwork.h>\r
#include <Protocol/PciIo.h>\r
#include <Protocol/NetworkInterfaceIdentifier.h>\r
#include <Protocol/DevicePath.h>\r
\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/DebugLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/DevicePathLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
\r
#include <Guid/EventGroup.h>\r
\r
#include <IndustryStandard/Pci.h>\r
\r
#include "Pxe.h"\r
\r
//\r
// BIOS Simple Network Protocol Device Structure\r
//\r
#define EFI_SIMPLE_NETWORK_DEV_SIGNATURE    SIGNATURE_32 ('s', 'n', '1', '6')\r
\r
#define INIT_PXE_STATUS                     0xabcd\r
\r
#define EFI_SIMPLE_NETWORK_MAX_TX_FIFO_SIZE 64\r
\r
typedef struct {\r
  UINT32  First;\r
  UINT32  Last;\r
  VOID *  Data[EFI_SIMPLE_NETWORK_MAX_TX_FIFO_SIZE];\r
} EFI_SIMPLE_NETWORK_DEV_FIFO;\r
\r
typedef struct {\r
  UINTN                                     Signature;\r
  EFI_HANDLE                                Handle;\r
  EFI_SIMPLE_NETWORK_PROTOCOL               SimpleNetwork;\r
  EFI_SIMPLE_NETWORK_MODE                   SimpleNetworkMode;\r
  EFI_NETWORK_INTERFACE_IDENTIFIER_PROTOCOL Nii;\r
  EFI_DEVICE_PATH_PROTOCOL                  *DevicePath;\r
  EFI_PCI_IO_PROTOCOL                       *PciIo;\r
  EFI_LEGACY_BIOS_PROTOCOL                  *LegacyBios;\r
\r
  //\r
  // Local Data for Simple Network Protocol interface goes here\r
  //\r
  BOOLEAN                                   UndiLoaded;\r
  EFI_EVENT                                 EfiBootEvent;\r
  EFI_EVENT                                 LegacyBootEvent;\r
  UINT16                                    PxeEntrySegment;\r
  UINT16                                    PxeEntryOffset;\r
  EFI_SIMPLE_NETWORK_DEV_FIFO               TxBufferFifo;\r
  EFI_DEVICE_PATH_PROTOCOL                  *BaseDevicePath;\r
  PXE_T                                     *Pxe;                   ///< Pointer to !PXE structure\r
  PXENV_UNDI_GET_INFORMATION_T              GetInformation;         ///< Data from GET INFORMATION\r
  PXENV_UNDI_GET_NIC_TYPE_T                 GetNicType;             ///< Data from GET NIC TYPE\r
  PXENV_UNDI_GET_NDIS_INFO_T                GetNdisInfo;            ///< Data from GET NDIS INFO\r
  BOOLEAN                                   IsrValid;               ///< TRUE if Isr contains valid data\r
  PXENV_UNDI_ISR_T                          Isr;                    ///< Data from ISR\r
  PXENV_UNDI_TBD_T                          *Xmit;                  //\r
  VOID                                      *TxRealModeMediaHeader; ///< < 1 MB Size = 0x100\r
  VOID                                      *TxRealModeDataBuffer;  ///< < 1 MB Size = GetInformation.MaxTranUnit\r
  VOID                                      *TxDestAddr;            ///< < 1 MB Size = 16\r
  UINT8                                     InterruptStatus;        ///< returned/cleared by GetStatus, set in ISR\r
  UINTN                                     UndiLoaderTablePages;\r
  UINTN                                     DestinationDataSegmentPages;\r
  UINTN                                     DestinationStackSegmentPages;\r
  UINTN                                     DestinationCodeSegmentPages;\r
  VOID                                      *UndiLoaderTable;\r
  VOID                                      *DestinationDataSegment;\r
  VOID                                      *DestinationStackSegment;\r
  VOID                                      *DestinationCodeSegment;\r
} EFI_SIMPLE_NETWORK_DEV;\r
\r
#define EFI_SIMPLE_NETWORK_DEV_FROM_THIS(a) \\r
  CR (a, \\r
      EFI_SIMPLE_NETWORK_DEV, \\r
      SimpleNetwork, \\r
      EFI_SIMPLE_NETWORK_DEV_SIGNATURE \\r
      )\r
\r
//\r
// Global Variables\r
//\r
extern EFI_DRIVER_BINDING_PROTOCOL  gBiosSnp16DriverBinding;\r
extern EFI_COMPONENT_NAME_PROTOCOL  gBiosSnp16ComponentName;\r
extern EFI_COMPONENT_NAME2_PROTOCOL gBiosSnp16ComponentName2;\r
\r
\r
//\r
// Driver Binding Protocol functions\r
//\r
/**\r
  Tests to see if this driver supports a given controller.\r
\r
  @param This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param Controller           The handle of the controller to test.\r
  @param RemainingDevicePath  A pointer to the remaining portion of a device path.\r
  \r
  @retval EFI_SUCCESS    The driver supports given controller.\r
  @retval EFI_UNSUPPORT  The driver doesn't support given controller.\r
  @retval Other          Other errors prevent driver finishing to test\r
                         if the driver supports given controller.\r
**/\r
EFI_STATUS\r
EFIAPI\r
BiosSnp16DriverBindingSupported (\r
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN EFI_HANDLE                   Controller,\r
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath\r
  )\r
;\r
\r
/**\r
  Starts the Snp device controller\r
\r
  @param This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param Controller           The handle of the controller to test.\r
  @param RemainingDevicePath  A pointer to the remaining portion of a device path.\r
  \r
  @retval  EFI_SUCCESS          - The device was started.   \r
  @retval  EFI_DEVICE_ERROR     - The device could not be started due to a device error.\r
  @retval  EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r
**/\r
EFI_STATUS\r
EFIAPI\r
BiosSnp16DriverBindingStart (\r
  IN EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN EFI_HANDLE                   Controller,\r
  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath\r
  )\r
;\r
\r
/**\r
  Stops the device by given device controller.\r
\r
  @param This               A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param Controller         The handle of the controller to test.\r
  @param NumberOfChildren   The number of child device handles in ChildHandleBuffer.\r
  @param ChildHandleBuffer  An array of child handles to be freed. May be NULL if\r
                            NumberOfChildren is 0.\r
  \r
  @retval  EFI_SUCCESS      - The device was stopped.\r
  @retval  EFI_DEVICE_ERROR - The device could not be stopped due to a device error.\r
**/\r
EFI_STATUS\r
EFIAPI\r
BiosSnp16DriverBindingStop (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN  EFI_HANDLE                   Controller,\r
  IN  UINTN                        NumberOfChildren,\r
  IN  EFI_HANDLE                   *ChildHandleBuffer\r
  )\r
;\r
\r
//\r
// Simple Network Protocol functions\r
//\r
/**\r
  Call 16 bit UNDI ROM to start the network interface\r
\r
  @param This       A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  \r
  @retval EFI_DEVICE_ERROR Network interface has not be initialized.\r
  @retval EFI_DEVICE_ERROR Fail to execute 16 bit ROM call.\r
  @retval EFI_SUCESS       Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkStart (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This\r
  )\r
;\r
\r
/**\r
  Call 16 bit UNDI ROM to stop the network interface\r
\r
  @param This       A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  \r
  @retval EFI_DEVICE_ERROR Network interface has not be initialized.\r
  @retval EFI_DEVICE_ERROR Fail to execute 16 bit ROM call.\r
  @retval EFI_SUCESS       Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkStop (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This\r
  )\r
;\r
\r
/**\r
  Initialize network interface \r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  @param ExtraRxBufferSize    The size of extra request receive buffer.\r
  @param ExtraTxBufferSize    The size of extra request transmit buffer.\r
 \r
  @retval EFI_DEVICE_ERROR Fail to execute 16 bit ROM call.\r
  @retval EFI_SUCESS       Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkInitialize (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL                     *This,\r
  IN UINTN                                           ExtraRxBufferSize  OPTIONAL,\r
  IN UINTN                                           ExtraTxBufferSize  OPTIONAL\r
  )\r
;\r
\r
/**\r
  Reset network interface.\r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  @param ExtendedVerification Need extended verfication.\r
  \r
  @retval EFI_INVALID_PARAMETER Invalid This paramter.\r
  @retval EFI_DEVICE_ERROR      Network device has not been initialized.\r
  @retval EFI_NOT_STARTED       Network device has been stopped.\r
  @retval EFI_DEVICE_ERROR      Invalid status for network device\r
  @retval EFI_SUCCESS           Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkReset (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  IN BOOLEAN                      ExtendedVerification\r
  )\r
;\r
\r
/**\r
  Shutdown network interface.\r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  \r
  @retval EFI_INVALID_PARAMETER Invalid This paramter.\r
  @retval EFI_DEVICE_ERROR      Network device has not been initialized.\r
  @retval EFI_NOT_STARTED       Network device has been stopped.\r
  @retval EFI_DEVICE_ERROR      Invalid status for network device\r
  @retval EFI_SUCCESS           Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkShutdown (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This\r
  )\r
;\r
\r
/**\r
  Reset network interface.\r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  @param Enable               Enable mask value\r
  @param Disable              Disable mask value\r
  @param ResetMCastFilter     Whether reset multi cast filter or not\r
  @param MCastFilterCnt       Count of mutli cast filter for different MAC address\r
  @param MCastFilter          Buffer for mustli cast filter for different MAC address.\r
  \r
  @retval EFI_INVALID_PARAMETER Invalid This paramter.\r
  @retval EFI_DEVICE_ERROR      Network device has not been initialized.\r
  @retval EFI_NOT_STARTED       Network device has been stopped.\r
  @retval EFI_DEVICE_ERROR      Invalid status for network device\r
  @retval EFI_SUCCESS           Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkReceiveFilters (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL                     * This,\r
  IN UINT32                                          Enable,\r
  IN UINT32                                          Disable,\r
  IN BOOLEAN                                         ResetMCastFilter,\r
  IN UINTN                                           MCastFilterCnt     OPTIONAL,\r
  IN EFI_MAC_ADDRESS                                 * MCastFilter OPTIONAL\r
  )\r
;\r
\r
/**\r
  Set new MAC address.\r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  @param Reset                Whether reset station MAC address to permenent address\r
  @param New                  A pointer to New address\r
  \r
  @retval EFI_INVALID_PARAMETER Invalid This paramter.\r
  @retval EFI_DEVICE_ERROR      Network device has not been initialized.\r
  @retval EFI_NOT_STARTED       Network device has been stopped.\r
  @retval EFI_DEVICE_ERROR      Invalid status for network device\r
  @retval EFI_SUCCESS           Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkStationAddress (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  * This,\r
  IN BOOLEAN                      Reset,\r
  IN EFI_MAC_ADDRESS              * New OPTIONAL\r
  )\r
;\r
\r
/**\r
  Collect statistics.\r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  @param Reset                Whether cleanup old statistics data.\r
  @param StatisticsSize       The buffer of statistics table.\r
  @param StatisticsTable      A pointer to statistics buffer.\r
  \r
  @retval EFI_INVALID_PARAMETER Invalid This paramter.\r
  @retval EFI_DEVICE_ERROR      Network device has not been initialized.\r
  @retval EFI_NOT_STARTED       Network device has been stopped.\r
  @retval EFI_DEVICE_ERROR      Invalid status for network device\r
  @retval EFI_SUCCESS           Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkStatistics (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  * This,\r
  IN BOOLEAN                      Reset,\r
  IN OUT UINTN                    *StatisticsSize OPTIONAL,\r
  OUT EFI_NETWORK_STATISTICS      * StatisticsTable OPTIONAL\r
  )\r
;\r
\r
/**\r
  Translate IP address to MAC address.\r
\r
  @param This                 A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.\r
  @param IPv6                 IPv6 or IPv4\r
  @param IP                   A pointer to given Ip address.\r
  @param MAC                  On return, translated MAC address.\r
  \r
  @retval EFI_INVALID_PARAMETER Invalid This paramter.\r
  @retval EFI_INVALID_PARAMETER Invalid IP address.\r
  @retval EFI_INVALID_PARAMETER Invalid return buffer for holding MAC address.\r
  @retval EFI_UNSUPPORTED       Do not support IPv6 \r
  @retval EFI_DEVICE_ERROR      Network device has not been initialized.\r
  @retval EFI_NOT_STARTED       Network device has been stopped.\r
  @retval EFI_DEVICE_ERROR      Invalid status for network device\r
  @retval EFI_SUCCESS           Success operation.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkMCastIpToMac (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  IN BOOLEAN                      IPv6,\r
  IN EFI_IP_ADDRESS               *IP,\r
  OUT EFI_MAC_ADDRESS             *MAC\r
  )\r
;\r
\r
/**\r
  Performs read and write operations on the NVRAM device attached to a \r
  network interface.\r
\r
  @param  This       The protocol instance pointer.\r
  @param  ReadWrite  TRUE for read operations, FALSE for write operations.\r
  @param  Offset     Byte offset in the NVRAM device at which to start the read or\r
                     write operation. This must be a multiple of NvRamAccessSize and\r
                     less than NvRamSize.\r
  @param  BufferSize The number of bytes to read or write from the NVRAM device.\r
                     This must also be a multiple of NvramAccessSize.\r
  @param  Buffer     A pointer to the data buffer.\r
\r
  @retval EFI_SUCCESS           The NVRAM access was performed.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network interface.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkNvData (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  IN BOOLEAN                      Write,\r
  IN UINTN                        Offset,\r
  IN UINTN                        BufferSize,\r
  IN OUT VOID                     *Buffer\r
  )\r
;\r
\r
/**\r
  Reads the current interrupt status and recycled transmit buffer status from \r
  a network interface.\r
\r
  @param  This            The protocol instance pointer.\r
  @param  InterruptStatus A pointer to the bit mask of the currently active interrupts\r
                          If this is NULL, the interrupt status will not be read from\r
                          the device. If this is not NULL, the interrupt status will\r
                          be read from the device. When the  interrupt status is read,\r
                          it will also be cleared. Clearing the transmit  interrupt\r
                          does not empty the recycled transmit buffer array.\r
  @param  TxBuf           Recycled transmit buffer address. The network interface will\r
                          not transmit if its internal recycled transmit buffer array\r
                          is full. Reading the transmit buffer does not clear the\r
                          transmit interrupt. If this is NULL, then the transmit buffer\r
                          status will not be read. If there are no transmit buffers to\r
                          recycle and TxBuf is not NULL, * TxBuf will be set to NULL.\r
\r
  @retval EFI_SUCCESS           The status of the network interface was retrieved.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network interface.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkGetStatus (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  * This,\r
  OUT UINT32                      *InterruptStatus OPTIONAL,\r
  OUT VOID                        **TxBuf OPTIONAL\r
  )\r
;\r
\r
/**\r
  Places a packet in the transmit queue of a network interface.\r
\r
  @param  This       The protocol instance pointer.\r
  @param  HeaderSize The size, in bytes, of the media header to be filled in by\r
                     the Transmit() function. If HeaderSize is non-zero, then it\r
                     must be equal to This->Mode->MediaHeaderSize and the DestAddr\r
                     and Protocol parameters must not be NULL.\r
  @param  BufferSize The size, in bytes, of the entire packet (media header and\r
                     data) to be transmitted through the network interface.\r
  @param  Buffer     A pointer to the packet (media header followed by data) to be\r
                     transmitted. This parameter cannot be NULL. If HeaderSize is zero,\r
                     then the media header in Buffer must already be filled in by the\r
                     caller. If HeaderSize is non-zero, then the media header will be\r
                     filled in by the Transmit() function.\r
  @param  SrcAddr    The source HW MAC address. If HeaderSize is zero, then this parameter\r
                     is ignored. If HeaderSize is non-zero and SrcAddr is NULL, then\r
                     This->Mode->CurrentAddress is used for the source HW MAC address.\r
  @param  DestAddr   The destination HW MAC address. If HeaderSize is zero, then this\r
                     parameter is ignored.\r
  @param  Protocol   The type of header to build. If HeaderSize is zero, then this\r
                     parameter is ignored. See RFC 1700, section "Ether Types", for\r
                     examples.\r
\r
  @retval EFI_SUCCESS           The packet was placed on the transmit queue.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_NOT_READY         The network interface is too busy to accept this transmit request.                      \r
  @retval EFI_BUFFER_TOO_SMALL  The BufferSize parameter is too small.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network interface.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkTransmit (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  IN UINTN                        HeaderSize,\r
  IN UINTN                        BufferSize,\r
  IN VOID                         *Buffer,\r
  IN EFI_MAC_ADDRESS              *SrcAddr OPTIONAL,\r
  IN EFI_MAC_ADDRESS              *DestAddr OPTIONAL,\r
  IN UINT16                       *Protocol OPTIONAL\r
  )\r
;\r
\r
/**\r
  Receives a packet from a network interface.\r
\r
  @param  This       The protocol instance pointer.\r
  @param  HeaderSize The size, in bytes, of the media header received on the network\r
                     interface. If this parameter is NULL, then the media header size\r
                     will not be returned.\r
  @param  BufferSize On entry, the size, in bytes, of Buffer. On exit, the size, in\r
                     bytes, of the packet that was received on the network interface.\r
  @param  Buffer     A pointer to the data buffer to receive both the media header and\r
                     the data.\r
  @param  SrcAddr    The source HW MAC address. If this parameter is NULL, the\r
                     HW MAC source address will not be extracted from the media\r
                     header.\r
  @param  DestAddr   The destination HW MAC address. If this parameter is NULL,\r
                     the HW MAC destination address will not be extracted from the\r
                     media header.\r
  @param  Protocol   The media header type. If this parameter is NULL, then the\r
                     protocol will not be extracted from the media header. See\r
                     RFC 1700 section "Ether Types" for examples.\r
\r
  @retval  EFI_SUCCESS           The received data was stored in Buffer, and BufferSize has\r
                                 been updated to the number of bytes received.\r
  @retval  EFI_NOT_STARTED       The network interface has not been started.\r
  @retval  EFI_NOT_READY         The network interface is too busy to accept this transmit\r
                                 request.\r
  @retval  EFI_BUFFER_TOO_SMALL  The BufferSize parameter is too small.\r
  @retval  EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.\r
  @retval  EFI_DEVICE_ERROR      The command could not be sent to the network interface.\r
  @retval  EFI_UNSUPPORTED       This function is not supported by the network interface.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
Undi16SimpleNetworkReceive (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  OUT UINTN                       *HeaderSize OPTIONAL,\r
  IN OUT UINTN                    *BufferSize,\r
  OUT VOID                        *Buffer,\r
  OUT EFI_MAC_ADDRESS             *SrcAddr OPTIONAL,\r
  OUT EFI_MAC_ADDRESS             *DestAddr OPTIONAL,\r
  OUT UINT16                      *Protocol OPTIONAL\r
  )\r
;\r
\r
/**\r
  wait for a packet to be received.\r
\r
  @param Event      Event used with WaitForEvent() to wait for a packet to be received.\r
  @param Context    Event Context\r
  \r
**/\r
VOID\r
EFIAPI\r
Undi16SimpleNetworkWaitForPacket (\r
  IN EFI_EVENT               Event,\r
  IN VOID                    *Context\r
  )\r
;\r
\r
/**\r
  Check whether packet is ready for receive.\r
\r
  @param This The protocol instance pointer.\r
  \r
  @retval  EFI_SUCCESS           Receive data is ready.\r
  @retval  EFI_NOT_STARTED       The network interface has not been started.\r
  @retval  EFI_NOT_READY         The network interface is too busy to accept this transmit\r
                                 request.\r
  @retval  EFI_BUFFER_TOO_SMALL  The BufferSize parameter is too small.\r
  @retval  EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.\r
  @retval  EFI_DEVICE_ERROR      The command could not be sent to the network interface.\r
  @retval  EFI_UNSUPPORTED       This function is not supported by the network interface.\r
**/\r
EFI_STATUS\r
Undi16SimpleNetworkCheckForPacket (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL *This\r
  )\r
;\r
\r
/**\r
 Cache Interrupt verctor address converted from IVT number.\r
\r
 @param VectorNumber  IVT number\r
 \r
 @retval EFI_SUCCESS Success to operation.\r
**/\r
EFI_STATUS\r
CacheVectorAddress (\r
  UINT8   VectorNumber\r
  )\r
;\r
\r
/**\r
 Get interrupt vector address according to IVT number. \r
  \r
 @param VectorNumber    Given IVT number\r
 \r
 @return cached interrupt vector address.\r
**/\r
EFI_STATUS\r
RestoreCachedVectorAddress (\r
  UINT8   VectorNumber\r
  )\r
;\r
\r
/**\r
  If available, launch the BaseCode from a NIC option ROM.\r
  This should install the !PXE and PXENV+ structures in memory for\r
  subsequent use.\r
  \r
\r
  @param SimpleNetworkDevice    Simple network device instance\r
  @param RomAddress             The ROM base address for NIC rom.\r
  \r
  @retval EFI_NOT_FOUND         The check sum does not match \r
  @retval EFI_NOT_FOUND         Rom ID offset is wrong \r
  @retval EFI_NOT_FOUND         No Rom ID structure is found \r
**/\r
EFI_STATUS\r
LaunchBaseCode (\r
  EFI_SIMPLE_NETWORK_DEV  *SimpleNetworkDevice,\r
  UINTN                   RomAddress\r
  )\r
;\r
\r
/**\r
  PXE \r
  START UNDI\r
  Op-Code: PXENV_START_UNDI (0000h)\r
  Input: Far pointer to a PXENV_START_UNDI_T parameter structure that has been initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This service is used to pass the BIOS parameter registers to the UNDI driver. The UNDI driver is\r
  responsible for saving the information it needs to communicate with the hardware.\r
  This service is also responsible for hooking the Int 1Ah service routine\r
  Note: This API service must be called only once during UNDI Option ROM boot.\r
  The UNDI driver is responsible for saving this information and using it every time\r
  PXENV_UNDI_STARTUP is called.\r
  Service cannot be used in protected mode.\r
  typedef struct  {\r
      PXENV_STATUS Status;\r
      UINT16 AX;\r
      UINT16 BX;\r
      UINT16 DX;\r
      UINT16 DI;\r
      UINT16 ES;\r
  } PXENV_START_UNDI_T;\r
  Set before calling API service\r
  AX, BX, DX, DI, ES: BIOS initialization parameter registers. These\r
  fields should contain the same information passed to the option ROM\r
  initialization routine by the Host System BIOS. Information about the\r
  contents of these registers can be found in the [PnP], [PCI] and\r
  [BBS] specifications.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.    \r
\r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                                \r
  @return Return value of PXE option ROM far call.                                \r
**/\r
EFI_STATUS\r
PxeStartUndi (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_START_UNDI_T               *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI STARTUP    \r
  Op-Code: PXENV_UNDI_STARTUP (0001h)\r
  Input: Far pointer to a PXENV_UNDI_STARTUP_T parameter structure that has been initialized by the\r
  caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the\r
  PXENV_STATUS_xxx constants.\r
  Description: This API is responsible for initializing the contents of the UNDI code & data segment for proper\r
  operation. Information from the !PXE structure and the first PXENV_START_UNDI API call is used\r
  to complete this initialization. The rest of the UNDI APIs will not be available until this call has\r
  been completed.\r
  Note: PXENV_UNDI_STARTUP must not be called again without first calling\r
  PXENV_UNDI_SHUTDOWN.\r
  PXENV_UNDI_STARTUP and PXENV_UNDI_SHUTDOWN are no longer responsible for\r
  chaining interrupt 1Ah. This must be done by the PXENV_START_UNDI and\r
  PXENV_STOP_UNDI API calls.\r
  This service cannot be used in protected mode.\r
  typedef struct \r
  {\r
      PXENV_STATUS Status;\r
  } PXENV_UNDI_STARTUP_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
\r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                                \r
  @return Return value of PXE option ROM far call.    \r
**/\r
EFI_STATUS\r
PxeUndiStartup (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_STARTUP_T             *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI CLEANUP\r
  Op-Code: PXENV_UNDI_CLEANUP (0002h)\r
  Input: Far pointer to a PXENV_UNDI_CLEANUP_T parameter structure.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field\r
  in the parameter structure must be set to one of the values represented by the\r
  PXENV_STATUS_xxx constants.\r
  Description: This call will prepare the network adapter driver to be unloaded from memory. This call must be\r
  made just before unloading the Universal NIC Driver. The rest of the API will not be available\r
  after this call executes.\r
  This service cannot be used in protected mode.\r
  typedef struct {\r
      PXENX_STATUS Status;\r
  } PXENV_UNDI_CLEANUP_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
\r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                                \r
  @return Return value of PXE option ROM far call. \r
**/\r
EFI_STATUS\r
PxeUndiCleanup (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_CLEANUP_T             *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI INITIALIZE\r
  Op-Code: PXENV_UNDI_INITIALIZE (0003h)\r
  Input: Far pointer to a PXENV_UNDI_INITIALIZE_T parameter structure that has been initialized by the\r
  caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call resets the adapter and programs it with default parameters. The default parameters used\r
  are those supplied to the most recent UNDI_STARTUP call. This routine does not enable the\r
  receive and transmit units of the network adapter to readily receive or transmit packets. The\r
  application must call PXENV_UNDI_OPEN to logically connect the network adapter to the network.\r
  This call must be made by an application to establish an interface to the network adapter driver.\r
  Note: When the PXE code makes this call to initialize the network adapter, it passes a NULL pointer for\r
  the Protocol field in the parameter structure.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    ADDR32 ProtocolIni;\r
    UINT8 reserved[8];\r
  } PXENV_UNDI_INITIALIZE_T;\r
  Set before calling API service\r
  ProtocolIni: Physical address of a memory copy of the driver\r
  module from the protocol.ini file obtained from the protocol manager\r
  driver (refer to the NDIS 2.0 specification). This parameter is\r
  supported for the universal NDIS driver to pass the information\r
  contained in the protocol.ini file to the NIC driver for any specific\r
  configuration of the NIC. (Note that the module identification in the\r
  protocol.ini file was done by NDIS.) This value can be NULL for any\r
  other application interfacing to the universal NIC driver\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.    \r
  \r
  @param  SimpleNetworkDevice   Device instance.\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                                \r
  @return Return value of PXE option ROM far call. \r
**/\r
EFI_STATUS\r
PxeUndiInitialize (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_INITIALIZE_T          *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  Wrapper routine for reset adapter.\r
  \r
  PXE \r
  UNDI RESET ADAPTER\r
  Op-Code: PXENV_UNDI_RESET_ADAPTER (0004h)\r
  Input: Far pointer to a PXENV_UNDI_RESET_ADAPTER_t parameter structure that has been initialized\r
  by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call resets and reinitializes the network adapter with the same set of parameters supplied to\r
  Initialize Routine. Unlike Initialize, this call opens the adapter that is, it connects logically to the\r
  network. This routine cannot be used to replace Initialize or Shutdown calls.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    PXENV_UNDI_MCAST_ADDRESS_t    R_Mcast_Buf;\r
  } PXENV_UNDI_RESET_T;\r
\r
  #define MAXNUM_MCADDR 8\r
\r
  typedef struct {\r
    UINT16 MCastAddrCount;\r
    MAC_ADDR McastAddr[MAXNUM_MCADDR];\r
  } PXENV_UNDI_MCAST_ADDRESS_t;\r
\r
  Set before calling API service\r
  R_Mcast_Buf: This is a structure of MCastAddrCount and\r
  McastAddr.\r
  MCastAddrCount: Number of multicast MAC addresses in the\r
  buffer.\r
  McastAddr: List of up to MAXNUM_MCADDR multicast MAC\r
  addresses.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  \r
  @param  SimpleNetworkDevice   Device instance.\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
  @param  RxFilter             Filter setting mask value for PXE recive .     \r
                               \r
  @return Return value of PXE option ROM far call. \r
**/\r
EFI_STATUS\r
PxeUndiResetNic (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_RESET_T               *PxeUndiTable,\r
  IN UINT16                               RxFilter\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI SHUTDOWN\r
  Op-Code: PXENV_UNDI_SHUTDOWN (0005h)\r
  Input: Far pointer to a PXENV_UNDI_SHUTDOWN_T parameter.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call resets the network adapter and leaves it in a safe state for another driver to program it.\r
  Note: The contents of the PXENV_UNDI_STARTUP parameter structure need to be saved by the\r
  Universal NIC Driver in case PXENV_UNDI_INITIALIZE is called again.\r
  typedef struct \r
  {\r
    PXENV_STATUS Status;\r
  } PXENV_UNDI_SHUTDOWN_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.   \r
**/\r
EFI_STATUS\r
PxeUndiShutdown (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_SHUTDOWN_T            *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI OPEN\r
  Op-Code: PXENV_UNDI_OPEN (0006h)\r
  Input: Far pointer to a PXENV_UNDI_OPEN_T parameter structure that has been initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call activates the adapter network connection and sets the adapter ready to accept packets\r
  for transmit and receive.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    UINT16 OpenFlag;\r
    UINT16 PktFilter;\r
      #define FLTR_DIRECTED 0x0001\r
      #define FLTR_BRDCST 0x0002\r
      #define FLTR_PRMSCS 0x0004\r
      #define FLTR_SRC_RTG 0x0008\r
    PXENV_UNDI_MCAST_ADDRESS_t R_Mcast_Buf;\r
  } PXENV_UNDI_OPEN_T;\r
  Set before calling API service\r
  OpenFlag: This is an adapter specific input parameter. This is\r
  supported for the universal NDIS 2.0 driver to pass in the open flags\r
  provided by the protocol driver. (See the NDIS 2.0 specification.)\r
  This can be zero.\r
  PktFilter: Filter for receiving packets. This can be one, or more, of\r
  the FLTR_xxx constants. Multiple values are arithmetically or-ed\r
  together.\r
  directed packets are packets that may come to your MAC address\r
  or the multicast MAC address.\r
  R_Mcast_Buf: See definition in UNDI RESET ADAPTER (0004h).\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiOpen (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_OPEN_T                *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI CLOSE\r
  Op-Code: PXENV_UNDI_CLOSE (0007h)\r
  Input: Far pointer to a PXENV_UNDI_CLOSE_T parameter.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call disconnects the network adapter from the network. Packets cannot be transmitted or\r
  received until the network adapter is open again.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
  } PXENV_UNDI_CLOSE_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiClose (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_CLOSE_T               *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI TRANSMIT PACKET\r
  Op-Code: PXENV_UNDI_TRANSMIT (0008h)\r
  Input: Far pointer to a PXENV_UNDI_TRANSMIT_T parameter structure that\r
  has been initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX.\r
  The status code must be set to one of the values represented by the\r
  PXENV_STATUS_xxx constants.\r
  Description: This call transmits a buffer to the network. The media header\r
  for the packet can be filled by the calling protocol, but it might not be.\r
  The network adapter driver will fill it if required by the values in the\r
  parameter block. The packet is buffered for transmission provided there is\r
  an available buffer, and the function returns PXENV_EXIT_SUCCESS. If no\r
  buffer is available the function returns PXENV_EXIT_FAILURE with a status\r
  code of PXE_UNDI_STATUS__OUT OF_RESOURCE. The number of buffers is\r
  implementation-dependent. An interrupt is generated on completion of the\r
  transmission of one or more packets. A call to PXENV_UNDI_TRANSMIT is\r
  permitted in the context of a transmit complete interrupt.\r
\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    UINT8 Protocol;\r
      #define P_UNKNOWN 0\r
      #define P_IP 1\r
      #define P_ARP 2\r
      #define P_RARP 3\r
    UINT8 XmitFlag;\r
      #define XMT_DESTADDR 0x0000\r
      #define XMT_BROADCAST 0x0001\r
    SEGOFF16 DestAddr;\r
    SEGOFF16 TBD;\r
    UINT32 Reserved[2];\r
  } t_PXENV_UNDI_TRANSMIT;\r
\r
  #define MAX_DATA_BLKS 8\r
\r
  typedef struct {\r
    UINT16 ImmedLength;\r
    SEGOFF16 Xmit;\r
    UINT16 DataBlkCount;\r
    struct DataBlk {\r
      UINT8 TDPtrType;\r
      UINT8 TDRsvdByte;\r
      UINT16 TDDataLen;\r
      SEGOFF16 TDDataPtr;\r
    } DataBlock[MAX_DATA_BLKS];\r
  } PXENV_UNDI_TBD_T\r
\r
  Set before calling API service\r
  Protocol: This is the protocol of the upper layer that is calling UNDI\r
  TRANSMIT call. If the upper layer has filled the media header, this\r
  field must be P_UNKNOWN.\r
  XmitFlag: If this flag is XMT_DESTADDR, the NIC driver expects a\r
  pointer to the destination media address in the field DestAddr. If\r
  XMT_BROADCAST, the NIC driver fills the broadcast address for the\r
  destination.\r
  TBD: Segment:Offset address of the transmit buffer descriptor.\r
  ImmedLength: Length of the immediate transmit buffer: Xmit.\r
  Xmit: Segment:Offset of the immediate transmit buffer.\r
  DataBlkCount: Number of blocks in this transmit buffer.\r
  TDPtrType:\r
  0 => 32-bit physical address in TDDataPtr (not supported in this\r
  version of PXE)\r
  1 => segment:offset in TDDataPtr which can be a real mode or 16-bit\r
  protected mode pointer\r
  TDRsvdByte: Reserved must be zero.\r
  TDDatalen: Data block length in bytes.\r
  TDDataPtr: Segment:Offset of the transmit block.\r
  DataBlock: Array of transmit data blocks.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants  \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiTransmit (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_TRANSMIT_T            *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI SET MULTICAST ADDRESS\r
  Op-Code: PXENV_UNDI_SET_MCAST_ADDRESS (0009h)\r
  Input: Far pointer to a PXENV_TFTP_SET_MCAST_ADDRESS_t parameter structure that has been\r
  initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call changes the current list of multicast addresses to the input list and resets the network\r
  adapter to accept it. If the number of multicast addresses is zero, multicast is disabled.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    PXENV_UNDI_MCAST_ADDRESS_t R_Mcast_Buf;\r
  } PXENV_UNDI_SET_MCAST_ADDR_T;\r
  Set before calling API service\r
  R_Mcast_Buf: See description in the UNDI RESET ADAPTER\r
  (0004h) API.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants        \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiSetMcastAddr (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_SET_MCAST_ADDR_T      *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI SET STATION ADDRESS\r
  Op-Code: PXENV_UNDI_SET_STATION_ADDRESS (000Ah)\r
  Input: Far pointer to a PXENV_UNDI_SET_STATION_ADDRESS_t parameter structure that has been\r
  initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call sets the MAC address to be the input value and is called before opening the network\r
  adapter. Later, the open call uses this variable as a temporary MAC address to program the\r
  adapter individual address registers.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    MAC_ADDR StationAddress;\r
  } PXENV_UNDI_SET_STATION_ADDR_T;\r
  Set before calling API service\r
  StationAddress: Temporary MAC address to be used for\r
  transmit and receive.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.     \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiSetStationAddr (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_SET_STATION_ADDR_T    *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI SET PACKET FILTER\r
  Op-Code: PXENV_UNDI_SET_PACKET_FILTER (000Bh)\r
  Input: Far pointer to a PXENV_UNDI_SET_PACKET_FILTER_T parameter structure that has been\r
  initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call resets the adapter's receive unit to accept a new filter, different from the one provided with\r
  the open call.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    UINT8 filter;\r
  } PXENV_UNDI_SET_PACKET_FILTER_T;\r
  Set before calling API service\r
  Filter: See the receive filter values in the UNDI OPEN\r
  (0006h) API description.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.   \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiSetPacketFilter (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_SET_PACKET_FILTER_T   *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI GET INFORMATION\r
  Op-Code: PXENV_UNDI_GET_INFORMATION (000Ch)\r
  Input: Far pointer to a PXENV_UNDI_GET_INFORMATION_T parameter structure that has been\r
  initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the\r
  PXENV_STATUS_xxx constants.\r
  Description: This call copies the network adapter variables, including the MAC address, into the input buffer.\r
  Note: The PermNodeAddress field must be valid after PXENV_START_UNDI and\r
  PXENV_UNDI_STARTUP have been issued. All other fields must be valid after\r
  PXENV_START_UNDI, PXENV_UNDI_STARTUP and PXENV_UNDI_INITIALIZE have been\r
  called.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    UINT16 BaseIo;\r
    UINT16 IntNumber;\r
    UINT16 MaxTranUnit;\r
    UINT16 HwType;\r
      #define ETHER_TYPE 1\r
      #define EXP_ETHER_TYPE 2\r
      #define IEEE_TYPE 6\r
      #define ARCNET_TYPE 7\r
    UINT16 HwAddrLen;\r
    MAC_ADDR CurrentNodeAddress;\r
    MAC_ADDR PermNodeAddress;\r
    SEGSEL ROMAddress;\r
    UINT16 RxBufCt;\r
    UINT16 TxBufCt;\r
  } PXENV_UNDI_GET_INFORMATION_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  BaseIO: Adapter base I/O address.\r
  IntNumber: Adapter IRQ number.\r
  MaxTranUnit: Adapter maximum transmit unit.\r
  HWType: Type of protocol at the hardware level.\r
  HWAddrLen: Length of the hardware address.\r
  CurrentNodeAddress: Current hardware address.\r
  PermNodeAddress: Permanent hardware address.\r
  ROMAddress: Real mode ROM segment address.\r
  RxBufCnt: Receive queue length.\r
  TxBufCnt: Transmit queue length.  \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiGetInformation (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_GET_INFORMATION_T     *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI GET STATISTICS\r
  Op-Code: PXENV_UNDI_GET_STATISTICS (000Dh)\r
  Input: Far pointer to a PXENV_UNDI_GET_STATISTICS_T parameter structure that has been initialized\r
  by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call reads statistical information from the network adapter, and returns.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
    UINT32 XmtGoodFrames;\r
    UINT32 RcvGoodFrames;\r
    UINT32 RcvCRCErrors;\r
    UINT32 RcvResourceErrors;\r
  } PXENV_UNDI_GET_STATISTICS_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  XmtGoodFrames: Number of successful transmissions.\r
  RcvGoodFrames: Number of good frames received.\r
  RcvCRCErrors: Number of frames received with CRC\r
  error.\r
  RcvResourceErrors: Number of frames discarded\r
  because receive queue was full.\r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiGetStatistics (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_GET_STATISTICS_T      *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI CLEAR STATISTICS\r
  Op-Code: PXENV_UNDI_CLEAR_STATISTICS (000Eh)\r
  Input: Far pointer to a PXENV_UNDI_CLEAR_STATISTICS_T parameter.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the\r
  PXENV_STATUS_xxx constants.\r
  Description: This call clears the statistical information from the network adapter.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
  } PXENV_UNDI_CLEAR_STATISTICS_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiClearStatistics (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_CLEAR_STATISTICS_T    *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI INITIATE DIAGS\r
  Op-Code: PXENV_UNDI_INITIATE_DIAGS (000Fh)\r
  Input: Far pointer to a PXENV_UNDI_INITIATE_DIAGS_T parameter.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the\r
  PXENV_STATUS_xxx constants.\r
  Description: This call can be used to initiate the run-time diagnostics. It causes the network adapter to run\r
  hardware diagnostics and to update its status information.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
  } PXENV_UNDI_INITIATE_DIAGS_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.    \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiInitiateDiags (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_INITIATE_DIAGS_T      *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI FORCE INTERRUPT\r
  Op-Code: PXENV_UNDI_FORCE_INTERRUPT (0010h)\r
  Input: Far pointer to a PXENV_UNDI_FORCE_INTERRUPT_T parameter structure that has been\r
  initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call forces the network adapter to generate an interrupt. When a receive interrupt occurs, the\r
  network adapter driver usually queues the packet and calls the application's callback receive\r
  routine with a pointer to the packet received. Then, the callback routine either can copy the packet\r
  to its buffer or can decide to delay the copy to a later time. If the packet is not immediately copied,\r
  the network adapter driver does not remove it from the input queue. When the application wants to\r
  copy the packet, it can call the PXENV_UNDI_FORCE_INTERRUPT routine to simulate the receive\r
  interrupt.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
  } PXENV_UNDI_FORCE_INTERRUPT_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.  \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiForceInterrupt (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_FORCE_INTERRUPT_T     *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI GET MULTICAST ADDRESS\r
  Op-Code: PXENV_UNDI_GET_MCAST_ADDRESS (0011h)\r
  Input: Far pointer to a PXENV_GET_MCAST_ADDRESS_t parameter structure that has been initialized\r
  by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This call converts the given IP multicast address to a hardware multicast address.\r
  typedef struct  {\r
    PXENV_STATUS Status;\r
    IP4 InetAddr;\r
    MAC_ADDR MediaAddr;\r
  } PXENV_UNDI_GET_MCAST_ADDR_T;\r
  Set before calling API service\r
  InetAddr: IP multicast address.\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  MediaAddr: MAC multicast address.\r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiGetMcastAddr (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_GET_MCAST_ADDR_T      *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI GET NIC TYPE\r
  Op-Code: PXENV_UNDI_GET_NIC_TYPE (0012h)\r
  Input: Far pointer to a PXENV_UNDI_GET_NIC_TYPE_T parameter structure that has been initialized by\r
  the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants. If the PXENV_EXIT_SUCCESS is returned the parameter structure must contain the\r
  NIC information.\r
  Description: This call, if successful, provides the NIC-specific information necessary to identify the network\r
  adapter that is used to boot the system.\r
  Note: The application first gets the DHCPDISCOVER packet using GET_CACHED_INFO and checks if\r
  the UNDI is supported before making this call. If the UNDI is not supported, the NIC-specific\r
  information can be obtained from the DHCPDISCOVER packet itself.\r
  PXENV_START_UNDI, PXENV_UNDI_STARTUP and PXENV_UNDI_INITIALIZE must be called\r
  before the information provided is valid.\r
  typedef {\r
    PXENV_STATUS Status;\r
    UINT8 NicType;\r
      #define PCI_NIC 2\r
      #define PnP_NIC 3\r
      #define CardBus_NIC 4\r
    Union {\r
      Struct {\r
        UINT16 Vendor_ID;\r
        UINT16 Dev_ID;\r
        UINT8 Base_Class;\r
        UINT8 Sub_Class;\r
        UINT8 Prog_Intf;\r
        UINT8 Rev;\r
        UINT16 BusDevFunc;\r
        UINT16 SubVendor_ID;\r
        UINT16 SubDevice_ID;\r
      } pci, cardbus;\r
      struct {\r
        UINT32 EISA_Dev_ID;\r
        UINT8 Base_Class;\r
        UINT8 Sub_Class;\r
        UINT8 Prog_Intf;\r
        UINT16 CardSelNum;\r
      } pnp;\r
    } info;\r
  } PXENV_UNDI_GET_NIC_TYPE_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  NICType: Type of NIC information stored in the parameter\r
  structure.\r
  Info: Information about the fields in this union can be found\r
  in the [PnP] and [PCI] specifications    \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiGetNicType (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_GET_NIC_TYPE_T        *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI GET IFACE INFO\r
  Op-Code: PXENV_UNDI_GET_IFACE_INFO (0013h)\r
  Input: Far pointer to a PXENV_UNDI_GET_IFACE_INFO_t parameter structure that has been initialized\r
  by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants. If the PXENV_EXIT_SUCCESS is returned, the parameter structure must contain the\r
  interface specific information.\r
  Description: This call, if successful, provides the network interface specific information such as the interface\r
  type at the link layer (Ethernet, Tokenring) and the link speed. This information can be used in the\r
  universal drivers such as NDIS or Miniport to communicate to the upper protocol modules.\r
  Note: UNDI follows the NDIS2 specification in giving this information. It is the responsibility of the\r
  universal driver to translate/convert this information into a format that is required in its specification\r
  or to suit the expectation of the upper level protocol modules.\r
  PXENV_START_UNDI, PXENV_UNDI_STARTUP and PXENV_UNDI_INITIALIZE must be called\r
  before the information provided is valid.\r
  typedef struct {\r
    PXENV_STATUS Status\r
    UINT8 IfaceType[16];\r
    UINT32 LinkSpeed;\r
    UINT32 ServiceFlags;\r
    UINT32 Reserved[4];\r
  } PXENV_UNDI_GET_NDIS_INFO_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  IfaceType: Name of MAC type in ASCIIZ format. This is\r
  used by the universal NDIS driver to specify its driver type\r
  to the protocol driver.\r
  LinkSpeed: Defined in the NDIS 2.0 specification.\r
  ServiceFlags: Defined in the NDIS 2.0 specification.\r
  Reserved: Must be zero.       \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiGetNdisInfo (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_GET_NDIS_INFO_T       *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI ISR\r
  Op-Code: PXENV_UNDI_ISR (0014h)\r
  Input: Far pointer to a PXENV_UNDI_ISR_T parameter structure that has been initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This API function will be called at different levels of processing the interrupt. The FuncFlag field in\r
  the parameter block indicates the operation to be performed for the call. This field is filled with the\r
  status of that operation on return.\r
  Note: Interrupt Service Routine Operation:\r
  In this design the UNDI does not hook the interrupt for the Network Interface. Instead, the\r
  application or the protocol driver hooks the interrupt and calls UNDI with the PXENV_UNDI_ISR\r
  API call for interrupt verification (PXENV_UNDI_ISR_IN_START) and processing\r
  (PXENV_UNDI_ISR_IN_PROCESS and PXENV_UNDI_ISR_GET_NEXT).\r
  When the Network Interface HW generates an interrupt the protocol driver interrupt service\r
  routine (ISR) gets control and takes care of the interrupt processing at the PIC level. The ISR then\r
  calls the UNDI using the PXENV_UNDI_ISR API with the value PXENV_UNDI_ISR_IN_START for\r
  the FuncFlag parameter. At this time UNDI must disable the interrupts at the Network Interface\r
  level and read any status values required to further process the interrupt. UNDI must return as\r
  quickly as possible with one of the two values, PXENV_UNDI_ISR_OUT_OURS or\r
  PXENV_UNDI_ISR_OUT_NOT_OURS, for the parameter FuncFlag depending on whether the\r
  interrupt was generated by this particular Network Interface or not.\r
  If the value returned in FuncFlag is PXENV_UNDI_ISR_OUT_NOT_OURS, then the interrupt was\r
  not generated by our NIC, and interrupt processing is complete.\r
  If the value returned in FuncFlag is PXENV_UNDI_ISR_OUT_OURS, the protocol driver must start\r
  a handler thread and send an end-of-interrupt (EOI) command to the PIC. Interrupt processing is\r
  now complete.\r
  The protocol driver strategy routine will call UNDI using this same API with FuncFlag equal to\r
  PXENV_UNDI_ISR_IN_PROCESS. At this time UNDI must find the cause of this interrupt and\r
  return the status in the FuncFlag. It first checks if there is a frame received and if so it returns the\r
  first buffer pointer of that frame in the parameter block.\r
  The protocol driver calls UNDI repeatedly with the FuncFlag equal to\r
  PXENV_UNDI_ISR_IN_GET_NEXT to get all the buffers in a frame and also all the received\r
  frames in the queue. On this call, UNDI must remember the previous buffer given to the protoco,l\r
  remove it from the receive queue and recycle it. In case of a multi-buffered frame, if the previous\r
  buffer is not the last buffer in the frame it must return the next buffer in the frame in the parameter\r
  block. Otherwise it must return the first buffer in the next frame.\r
  If there is no received frame pending to be processed, UNDI processes the transmit completes and\r
  if there is no other interrupt status to be processed, UNDI re-enables the interrupt at the\r
  NETWORK INTERFACE level and returns PXENV_UNDI_ISR_OUT_DONE in the FuncFlag.\r
  IMPORTANT: It is possible for the protocol driver to be interrupted again while in the\r
  strategy routine when the UNDI re-enables interrupts.   \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiIsr (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_ISR_T                 *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  STOP UNDI\r
  Op-Code: PXENV_STOP_UNDI (0015h)\r
  Input: Far pointer to a PXENV_STOP_UNDI_T parameter structure that has been initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This routine is responsible for unhooking the Int 1Ah service routine.\r
  Note: This API service must be called only once at the end of UNDI Option ROM boot. One of the valid\r
  status codes is PXENV_STATUS_KEEP. If this status is returned, UNDI must not be removed from\r
  base memory. Also, UNDI must not be removed from base memory if BC is not removed from base\r
  memory.\r
  Service cannot be used in protected mode.\r
  typedef struct {\r
    PXENV_STATUS Status;\r
  } PXENV_STOP_UNDI_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.      \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiStop (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_STOP_UNDI_T                *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  PXE \r
  UNDI GET STATE\r
  Op-Code: PXENV_UNDI_GET_STATE (0015h)\r
  Input: Far pointer to a PXENV_UNDI_GET_STATE_T parameter.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants. The UNDI_STATE field in the parameter structure must be set to one of the valid state\r
  constants\r
  Description: This call can be used to obtain state of the UNDI engine in order to avoid issuing adverse call\r
  sequences\r
  typedef struct {\r
    #define PXE_UNDI_GET_STATE_STARTED 1\r
    #define PXE_UNDI_GET_STATE_INITIALIZED 2\r
    #define PXE_UNDI_GET_STATE_OPENED 3\r
    PXENV_STATUS Status;\r
    UINT8 UNDIstate;\r
  } PXENV_UNDI_GET_STATE_T;\r
  Set before calling API service\r
  N/A\r
  Returned from API service\r
  Status: See the PXENV_STATUS_xxx constants.\r
  State: See definitions of the state constants.\r
  Note. UNDI implementation is responsible for maintaining\r
  internal state machine.\r
  UNDI ISR\r
  Op-Code: PXENV_UNDI_ISR (0014h)\r
  Input: Far pointer to a t_PXENV_UNDI_ISR parameter structure that has been initialized by the caller.\r
  Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in\r
  the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx\r
  constants.\r
  Description: This API function will be called at different levels of processing the interrupt. The FuncFlag field in\r
  the parameter block indicates the operation to be performed for the call. This field is filled with the\r
  status of that operation on return.     \r
  \r
  @param  SimpleNetworkDevice   Device instance\r
  @param  PxeUndiTable          Point to structure which hold paramter and return value \r
                                for option ROM call.\r
                              \r
  @return Return value of PXE option ROM far call.  \r
**/\r
EFI_STATUS\r
PxeUndiGetState (\r
  IN EFI_SIMPLE_NETWORK_DEV               *SimpleNetworkDevice,\r
  IN OUT PXENV_UNDI_GET_STATE_T           *PxeUndiTable\r
  )\r
;\r
\r
/**\r
  Effect the Far Call into the PXE Layer\r
\r
  Note: When using a 32-bit stack segment do not push 32-bit words onto the stack. The PXE API\r
  services will not work, unless there are three 16-bit parameters pushed onto the stack.\r
      push DS                                 ;Far pointer to parameter structure\r
      push offset pxe_data_call_struct        ;is pushed onto stack.\r
      push Index                              ;UINT16 is pushed onto stack.\r
      call dword ptr (s_PXE ptr es:[di]).EntryPointSP\r
      add sp, 6 ;Caller cleans up stack.  \r
\r
  @param SimpleNetworkDevice    Device instance for simple network\r
  @param Table                 Point to parameter/retun value table for legacy far call\r
  @param TableSize              The size of paramter/return value table\r
  @param CallIndex              The index of legacy call.\r
  \r
  @return EFI_STATUS \r
**/\r
EFI_STATUS\r
MakePxeCall (\r
  EFI_SIMPLE_NETWORK_DEV  *SimpleNetworkDevice,\r
  IN OUT VOID             *Table,\r
  IN UINTN                TableSize,\r
  IN UINT16               CallIndex\r
  )\r
;\r
\r
/**\r
  Allocate buffer below 1M for real mode.\r
\r
  @param NumPages     The number pages want to be allocated.\r
  @param Buffer       On return, allocated buffer.\r
  \r
  @return Status of allocating pages.\r
**/\r
EFI_STATUS\r
BiosSnp16AllocatePagesBelowOneMb (\r
  UINTN  NumPages,\r
  VOID   **Buffer\r
  )\r
;\r
\r
#endif\r