BiosSnp16.h revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
Copyright (c) 1999 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions
of the BSD License which accompanies this distribution. The
full text of the license may be found at
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _BIOS_SNP_16_H_
#define _BIOS_SNP_16_H_
#include <Uefi.h>
#include <Protocol/LegacyBios.h>
#include <Protocol/SimpleNetwork.h>
#include <Protocol/NetworkInterfaceIdentifier.h>
#include <Protocol/DevicePath.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Guid/EventGroup.h>
#include <IndustryStandard/Pci.h>
#include "Pxe.h"
//
// BIOS Simple Network Protocol Device Structure
//
#define INIT_PXE_STATUS 0xabcd
#define EFI_SIMPLE_NETWORK_MAX_TX_FIFO_SIZE 64
typedef struct {
typedef struct {
//
// Local Data for Simple Network Protocol interface goes here
//
#define EFI_SIMPLE_NETWORK_DEV_FROM_THIS(a) \
CR (a, \
)
//
// Global Variables
//
//
// Driver Binding Protocol functions
//
/**
Tests to see if this driver supports a given controller.
@param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param Controller The handle of the controller to test.
@param RemainingDevicePath A pointer to the remaining portion of a device path.
@retval EFI_SUCCESS The driver supports given controller.
@retval EFI_UNSUPPORT The driver doesn't support given controller.
@retval Other Other errors prevent driver finishing to test
if the driver supports given controller.
**/
)
;
/**
Starts the Snp device controller
@param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param Controller The handle of the controller to test.
@param RemainingDevicePath A pointer to the remaining portion of a device path.
@retval EFI_SUCCESS - The device was started.
@retval EFI_DEVICE_ERROR - The device could not be started due to a device error.
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
**/
)
;
/**
Stops the device by given device controller.
@param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
@param Controller The handle of the controller to test.
@param NumberOfChildren The number of child device handles in ChildHandleBuffer.
@param ChildHandleBuffer An array of child handles to be freed. May be NULL if
NumberOfChildren is 0.
@retval EFI_SUCCESS - The device was stopped.
@retval EFI_DEVICE_ERROR - The device could not be stopped due to a device error.
**/
)
;
//
// Simple Network Protocol functions
//
/**
Call 16 bit UNDI ROM to start the network interface
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@retval EFI_DEVICE_ERROR Network interface has not be initialized.
@retval EFI_DEVICE_ERROR Fail to execute 16 bit ROM call.
@retval EFI_SUCESS Success operation.
**/
)
;
/**
Call 16 bit UNDI ROM to stop the network interface
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@retval EFI_DEVICE_ERROR Network interface has not be initialized.
@retval EFI_DEVICE_ERROR Fail to execute 16 bit ROM call.
@retval EFI_SUCESS Success operation.
**/
)
;
/**
Initialize network interface
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@param ExtraRxBufferSize The size of extra request receive buffer.
@param ExtraTxBufferSize The size of extra request transmit buffer.
@retval EFI_DEVICE_ERROR Fail to execute 16 bit ROM call.
@retval EFI_SUCESS Success operation.
**/
)
;
/**
Reset network interface.
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@param ExtendedVerification Need extended verfication.
@retval EFI_INVALID_PARAMETER Invalid This paramter.
@retval EFI_DEVICE_ERROR Network device has not been initialized.
@retval EFI_NOT_STARTED Network device has been stopped.
@retval EFI_DEVICE_ERROR Invalid status for network device
@retval EFI_SUCCESS Success operation.
**/
)
;
/**
Shutdown network interface.
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@retval EFI_INVALID_PARAMETER Invalid This paramter.
@retval EFI_DEVICE_ERROR Network device has not been initialized.
@retval EFI_NOT_STARTED Network device has been stopped.
@retval EFI_DEVICE_ERROR Invalid status for network device
@retval EFI_SUCCESS Success operation.
**/
)
;
/**
Reset network interface.
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@param Enable Enable mask value
@param Disable Disable mask value
@param ResetMCastFilter Whether reset multi cast filter or not
@param MCastFilterCnt Count of mutli cast filter for different MAC address
@param MCastFilter Buffer for mustli cast filter for different MAC address.
@retval EFI_INVALID_PARAMETER Invalid This paramter.
@retval EFI_DEVICE_ERROR Network device has not been initialized.
@retval EFI_NOT_STARTED Network device has been stopped.
@retval EFI_DEVICE_ERROR Invalid status for network device
@retval EFI_SUCCESS Success operation.
**/
)
;
/**
Set new MAC address.
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@param Reset Whether reset station MAC address to permenent address
@param New A pointer to New address
@retval EFI_INVALID_PARAMETER Invalid This paramter.
@retval EFI_DEVICE_ERROR Network device has not been initialized.
@retval EFI_NOT_STARTED Network device has been stopped.
@retval EFI_DEVICE_ERROR Invalid status for network device
@retval EFI_SUCCESS Success operation.
**/
)
;
/**
Collect statistics.
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@param Reset Whether cleanup old statistics data.
@param StatisticsSize The buffer of statistics table.
@param StatisticsTable A pointer to statistics buffer.
@retval EFI_INVALID_PARAMETER Invalid This paramter.
@retval EFI_DEVICE_ERROR Network device has not been initialized.
@retval EFI_NOT_STARTED Network device has been stopped.
@retval EFI_DEVICE_ERROR Invalid status for network device
@retval EFI_SUCCESS Success operation.
**/
)
;
/**
Translate IP address to MAC address.
@param This A pointer to EFI_SIMPLE_NETWORK_PROTOCOL structure.
@param IPv6 IPv6 or IPv4
@param IP A pointer to given Ip address.
@param MAC On return, translated MAC address.
@retval EFI_INVALID_PARAMETER Invalid This paramter.
@retval EFI_INVALID_PARAMETER Invalid IP address.
@retval EFI_INVALID_PARAMETER Invalid return buffer for holding MAC address.
@retval EFI_UNSUPPORTED Do not support IPv6
@retval EFI_DEVICE_ERROR Network device has not been initialized.
@retval EFI_NOT_STARTED Network device has been stopped.
@retval EFI_DEVICE_ERROR Invalid status for network device
@retval EFI_SUCCESS Success operation.
**/
)
;
/**
Performs read and write operations on the NVRAM device attached to a
network interface.
@param This The protocol instance pointer.
@param ReadWrite TRUE for read operations, FALSE for write operations.
@param Offset Byte offset in the NVRAM device at which to start the read or
write operation. This must be a multiple of NvRamAccessSize and
less than NvRamSize.
@param BufferSize The number of bytes to read or write from the NVRAM device.
This must also be a multiple of NvramAccessSize.
@param Buffer A pointer to the data buffer.
@retval EFI_SUCCESS The NVRAM access was performed.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
@retval EFI_UNSUPPORTED This function is not supported by the network interface.
**/
)
;
/**
Reads the current interrupt status and recycled transmit buffer status from
a network interface.
@param This The protocol instance pointer.
@param InterruptStatus A pointer to the bit mask of the currently active interrupts
If this is NULL, the interrupt status will not be read from
the device. If this is not NULL, the interrupt status will
be read from the device. When the interrupt status is read,
it will also be cleared. Clearing the transmit interrupt
does not empty the recycled transmit buffer array.
@param TxBuf Recycled transmit buffer address. The network interface will
not transmit if its internal recycled transmit buffer array
is full. Reading the transmit buffer does not clear the
transmit interrupt. If this is NULL, then the transmit buffer
status will not be read. If there are no transmit buffers to
recycle and TxBuf is not NULL, * TxBuf will be set to NULL.
@retval EFI_SUCCESS The status of the network interface was retrieved.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
@retval EFI_UNSUPPORTED This function is not supported by the network interface.
**/
)
;
/**
Places a packet in the transmit queue of a network interface.
@param This The protocol instance pointer.
@param HeaderSize The size, in bytes, of the media header to be filled in by
the Transmit() function. If HeaderSize is non-zero, then it
must be equal to This->Mode->MediaHeaderSize and the DestAddr
and Protocol parameters must not be NULL.
@param BufferSize The size, in bytes, of the entire packet (media header and
data) to be transmitted through the network interface.
@param Buffer A pointer to the packet (media header followed by data) to be
transmitted. This parameter cannot be NULL. If HeaderSize is zero,
then the media header in Buffer must already be filled in by the
caller. If HeaderSize is non-zero, then the media header will be
filled in by the Transmit() function.
@param SrcAddr The source HW MAC address. If HeaderSize is zero, then this parameter
is ignored. If HeaderSize is non-zero and SrcAddr is NULL, then
This->Mode->CurrentAddress is used for the source HW MAC address.
@param DestAddr The destination HW MAC address. If HeaderSize is zero, then this
parameter is ignored.
@param Protocol The type of header to build. If HeaderSize is zero, then this
parameter is ignored. See RFC 1700, section "Ether Types", for
examples.
@retval EFI_SUCCESS The packet was placed on the transmit queue.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_NOT_READY The network interface is too busy to accept this transmit request.
@retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
@retval EFI_UNSUPPORTED This function is not supported by the network interface.
**/
)
;
/**
Receives a packet from a network interface.
@param This The protocol instance pointer.
@param HeaderSize The size, in bytes, of the media header received on the network
interface. If this parameter is NULL, then the media header size
will not be returned.
@param BufferSize On entry, the size, in bytes, of Buffer. On exit, the size, in
bytes, of the packet that was received on the network interface.
@param Buffer A pointer to the data buffer to receive both the media header and
the data.
@param SrcAddr The source HW MAC address. If this parameter is NULL, the
HW MAC source address will not be extracted from the media
header.
@param DestAddr The destination HW MAC address. If this parameter is NULL,
the HW MAC destination address will not be extracted from the
media header.
@param Protocol The media header type. If this parameter is NULL, then the
protocol will not be extracted from the media header. See
RFC 1700 section "Ether Types" for examples.
@retval EFI_SUCCESS The received data was stored in Buffer, and BufferSize has
been updated to the number of bytes received.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_NOT_READY The network interface is too busy to accept this transmit
request.
@retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
@retval EFI_UNSUPPORTED This function is not supported by the network interface.
**/
)
;
/**
wait for a packet to be received.
@param Event Event used with WaitForEvent() to wait for a packet to be received.
@param Context Event Context
**/
)
;
/**
Check whether packet is ready for receive.
@param This The protocol instance pointer.
@retval EFI_SUCCESS Receive data is ready.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_NOT_READY The network interface is too busy to accept this transmit
request.
@retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
@retval EFI_UNSUPPORTED This function is not supported by the network interface.
**/
)
;
/**
Cache Interrupt verctor address converted from IVT number.
@param VectorNumber IVT number
@retval EFI_SUCCESS Success to operation.
**/
)
;
/**
Get interrupt vector address according to IVT number.
@param VectorNumber Given IVT number
@return cached interrupt vector address.
**/
)
;
/**
If available, launch the BaseCode from a NIC option ROM.
This should install the !PXE and PXENV+ structures in memory for
subsequent use.
@param SimpleNetworkDevice Simple network device instance
@param RomAddress The ROM base address for NIC rom.
@retval EFI_NOT_FOUND The check sum does not match
@retval EFI_NOT_FOUND Rom ID offset is wrong
@retval EFI_NOT_FOUND No Rom ID structure is found
**/
)
;
/**
PXE
START UNDI
Op-Code: PXENV_START_UNDI (0000h)
Input: Far pointer to a PXENV_START_UNDI_T parameter structure that has been initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This service is used to pass the BIOS parameter registers to the UNDI driver. The UNDI driver is
responsible for saving the information it needs to communicate with the hardware.
This service is also responsible for hooking the Int 1Ah service routine
Note: This API service must be called only once during UNDI Option ROM boot.
The UNDI driver is responsible for saving this information and using it every time
PXENV_UNDI_STARTUP is called.
Service cannot be used in protected mode.
typedef struct {
PXENV_STATUS Status;
UINT16 AX;
UINT16 BX;
UINT16 DX;
UINT16 DI;
UINT16 ES;
} PXENV_START_UNDI_T;
Set before calling API service
AX, BX, DX, DI, ES: BIOS initialization parameter registers. These
fields should contain the same information passed to the option ROM
initialization routine by the Host System BIOS. Information about the
contents of these registers can be found in the [PnP], [PCI] and
[BBS] specifications.
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI STARTUP
Op-Code: PXENV_UNDI_STARTUP (0001h)
Input: Far pointer to a PXENV_UNDI_STARTUP_T parameter structure that has been initialized by the
caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the
PXENV_STATUS_xxx constants.
Description: This API is responsible for initializing the contents of the UNDI code & data segment for proper
operation. Information from the !PXE structure and the first PXENV_START_UNDI API call is used
to complete this initialization. The rest of the UNDI APIs will not be available until this call has
been completed.
Note: PXENV_UNDI_STARTUP must not be called again without first calling
PXENV_UNDI_SHUTDOWN.
PXENV_UNDI_STARTUP and PXENV_UNDI_SHUTDOWN are no longer responsible for
chaining interrupt 1Ah. This must be done by the PXENV_START_UNDI and
PXENV_STOP_UNDI API calls.
This service cannot be used in protected mode.
typedef struct
{
PXENV_STATUS Status;
} PXENV_UNDI_STARTUP_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI CLEANUP
Op-Code: PXENV_UNDI_CLEANUP (0002h)
Input: Far pointer to a PXENV_UNDI_CLEANUP_T parameter structure.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field
in the parameter structure must be set to one of the values represented by the
PXENV_STATUS_xxx constants.
Description: This call will prepare the network adapter driver to be unloaded from memory. This call must be
made just before unloading the Universal NIC Driver. The rest of the API will not be available
after this call executes.
This service cannot be used in protected mode.
typedef struct {
PXENX_STATUS Status;
} PXENV_UNDI_CLEANUP_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI INITIALIZE
Op-Code: PXENV_UNDI_INITIALIZE (0003h)
Input: Far pointer to a PXENV_UNDI_INITIALIZE_T parameter structure that has been initialized by the
caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call resets the adapter and programs it with default parameters. The default parameters used
are those supplied to the most recent UNDI_STARTUP call. This routine does not enable the
receive and transmit units of the network adapter to readily receive or transmit packets. The
application must call PXENV_UNDI_OPEN to logically connect the network adapter to the network.
This call must be made by an application to establish an interface to the network adapter driver.
Note: When the PXE code makes this call to initialize the network adapter, it passes a NULL pointer for
the Protocol field in the parameter structure.
typedef struct {
PXENV_STATUS Status;
ADDR32 ProtocolIni;
UINT8 reserved[8];
} PXENV_UNDI_INITIALIZE_T;
Set before calling API service
ProtocolIni: Physical address of a memory copy of the driver
module from the protocol.ini file obtained from the protocol manager
driver (refer to the NDIS 2.0 specification). This parameter is
supported for the universal NDIS driver to pass the information
contained in the protocol.ini file to the NIC driver for any specific
configuration of the NIC. (Note that the module identification in the
protocol.ini file was done by NDIS.) This value can be NULL for any
other application interfacing to the universal NIC driver
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance.
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
Wrapper routine for reset adapter.
PXE
UNDI RESET ADAPTER
Op-Code: PXENV_UNDI_RESET_ADAPTER (0004h)
Input: Far pointer to a PXENV_UNDI_RESET_ADAPTER_t parameter structure that has been initialized
by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call resets and reinitializes the network adapter with the same set of parameters supplied to
Initialize Routine. Unlike Initialize, this call opens the adapter that is, it connects logically to the
network. This routine cannot be used to replace Initialize or Shutdown calls.
typedef struct {
PXENV_STATUS Status;
PXENV_UNDI_MCAST_ADDRESS_t R_Mcast_Buf;
} PXENV_UNDI_RESET_T;
#define MAXNUM_MCADDR 8
typedef struct {
UINT16 MCastAddrCount;
MAC_ADDR McastAddr[MAXNUM_MCADDR];
} PXENV_UNDI_MCAST_ADDRESS_t;
Set before calling API service
R_Mcast_Buf: This is a structure of MCastAddrCount and
McastAddr.
MCastAddrCount: Number of multicast MAC addresses in the
buffer.
McastAddr: List of up to MAXNUM_MCADDR multicast MAC
addresses.
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance.
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@param RxFilter Filter setting mask value for PXE recive .
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI SHUTDOWN
Op-Code: PXENV_UNDI_SHUTDOWN (0005h)
Input: Far pointer to a PXENV_UNDI_SHUTDOWN_T parameter.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call resets the network adapter and leaves it in a safe state for another driver to program it.
Note: The contents of the PXENV_UNDI_STARTUP parameter structure need to be saved by the
Universal NIC Driver in case PXENV_UNDI_INITIALIZE is called again.
typedef struct
{
PXENV_STATUS Status;
} PXENV_UNDI_SHUTDOWN_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI OPEN
Op-Code: PXENV_UNDI_OPEN (0006h)
Input: Far pointer to a PXENV_UNDI_OPEN_T parameter structure that has been initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call activates the adapter network connection and sets the adapter ready to accept packets
for transmit and receive.
typedef struct {
PXENV_STATUS Status;
UINT16 OpenFlag;
UINT16 PktFilter;
#define FLTR_DIRECTED 0x0001
#define FLTR_BRDCST 0x0002
#define FLTR_PRMSCS 0x0004
#define FLTR_SRC_RTG 0x0008
PXENV_UNDI_MCAST_ADDRESS_t R_Mcast_Buf;
} PXENV_UNDI_OPEN_T;
Set before calling API service
OpenFlag: This is an adapter specific input parameter. This is
supported for the universal NDIS 2.0 driver to pass in the open flags
provided by the protocol driver. (See the NDIS 2.0 specification.)
This can be zero.
PktFilter: Filter for receiving packets. This can be one, or more, of
the FLTR_xxx constants. Multiple values are arithmetically or-ed
together.
directed packets are packets that may come to your MAC address
or the multicast MAC address.
R_Mcast_Buf: See definition in UNDI RESET ADAPTER (0004h).
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI CLOSE
Op-Code: PXENV_UNDI_CLOSE (0007h)
Input: Far pointer to a PXENV_UNDI_CLOSE_T parameter.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call disconnects the network adapter from the network. Packets cannot be transmitted or
received until the network adapter is open again.
typedef struct {
PXENV_STATUS Status;
} PXENV_UNDI_CLOSE_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI TRANSMIT PACKET
Op-Code: PXENV_UNDI_TRANSMIT (0008h)
Input: Far pointer to a PXENV_UNDI_TRANSMIT_T parameter structure that
has been initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX.
The status code must be set to one of the values represented by the
PXENV_STATUS_xxx constants.
Description: This call transmits a buffer to the network. The media header
for the packet can be filled by the calling protocol, but it might not be.
The network adapter driver will fill it if required by the values in the
parameter block. The packet is buffered for transmission provided there is
an available buffer, and the function returns PXENV_EXIT_SUCCESS. If no
buffer is available the function returns PXENV_EXIT_FAILURE with a status
code of PXE_UNDI_STATUS__OUT OF_RESOURCE. The number of buffers is
implementation-dependent. An interrupt is generated on completion of the
transmission of one or more packets. A call to PXENV_UNDI_TRANSMIT is
permitted in the context of a transmit complete interrupt.
typedef struct {
PXENV_STATUS Status;
UINT8 Protocol;
#define P_UNKNOWN 0
#define P_IP 1
#define P_ARP 2
#define P_RARP 3
UINT8 XmitFlag;
#define XMT_DESTADDR 0x0000
#define XMT_BROADCAST 0x0001
SEGOFF16 DestAddr;
SEGOFF16 TBD;
UINT32 Reserved[2];
} t_PXENV_UNDI_TRANSMIT;
#define MAX_DATA_BLKS 8
typedef struct {
UINT16 ImmedLength;
SEGOFF16 Xmit;
UINT16 DataBlkCount;
struct DataBlk {
UINT8 TDPtrType;
UINT8 TDRsvdByte;
UINT16 TDDataLen;
SEGOFF16 TDDataPtr;
} DataBlock[MAX_DATA_BLKS];
} PXENV_UNDI_TBD_T
Set before calling API service
Protocol: This is the protocol of the upper layer that is calling UNDI
TRANSMIT call. If the upper layer has filled the media header, this
field must be P_UNKNOWN.
XmitFlag: If this flag is XMT_DESTADDR, the NIC driver expects a
pointer to the destination media address in the field DestAddr. If
XMT_BROADCAST, the NIC driver fills the broadcast address for the
destination.
TBD: Segment:Offset address of the transmit buffer descriptor.
ImmedLength: Length of the immediate transmit buffer: Xmit.
Xmit: Segment:Offset of the immediate transmit buffer.
DataBlkCount: Number of blocks in this transmit buffer.
TDPtrType:
0 => 32-bit physical address in TDDataPtr (not supported in this
version of PXE)
1 => segment:offset in TDDataPtr which can be a real mode or 16-bit
protected mode pointer
TDRsvdByte: Reserved must be zero.
TDDatalen: Data block length in bytes.
TDDataPtr: Segment:Offset of the transmit block.
DataBlock: Array of transmit data blocks.
Returned from API service
Status: See the PXENV_STATUS_xxx constants
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI SET MULTICAST ADDRESS
Op-Code: PXENV_UNDI_SET_MCAST_ADDRESS (0009h)
Input: Far pointer to a PXENV_TFTP_SET_MCAST_ADDRESS_t parameter structure that has been
initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call changes the current list of multicast addresses to the input list and resets the network
adapter to accept it. If the number of multicast addresses is zero, multicast is disabled.
typedef struct {
PXENV_STATUS Status;
PXENV_UNDI_MCAST_ADDRESS_t R_Mcast_Buf;
} PXENV_UNDI_SET_MCAST_ADDR_T;
Set before calling API service
R_Mcast_Buf: See description in the UNDI RESET ADAPTER
(0004h) API.
Returned from API service
Status: See the PXENV_STATUS_xxx constants
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI SET STATION ADDRESS
Op-Code: PXENV_UNDI_SET_STATION_ADDRESS (000Ah)
Input: Far pointer to a PXENV_UNDI_SET_STATION_ADDRESS_t parameter structure that has been
initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call sets the MAC address to be the input value and is called before opening the network
adapter. Later, the open call uses this variable as a temporary MAC address to program the
adapter individual address registers.
typedef struct {
PXENV_STATUS Status;
MAC_ADDR StationAddress;
} PXENV_UNDI_SET_STATION_ADDR_T;
Set before calling API service
StationAddress: Temporary MAC address to be used for
transmit and receive.
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI SET PACKET FILTER
Op-Code: PXENV_UNDI_SET_PACKET_FILTER (000Bh)
Input: Far pointer to a PXENV_UNDI_SET_PACKET_FILTER_T parameter structure that has been
initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call resets the adapter's receive unit to accept a new filter, different from the one provided with
the open call.
typedef struct {
PXENV_STATUS Status;
UINT8 filter;
} PXENV_UNDI_SET_PACKET_FILTER_T;
Set before calling API service
Filter: See the receive filter values in the UNDI OPEN
(0006h) API description.
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI GET INFORMATION
Op-Code: PXENV_UNDI_GET_INFORMATION (000Ch)
Input: Far pointer to a PXENV_UNDI_GET_INFORMATION_T parameter structure that has been
initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the
PXENV_STATUS_xxx constants.
Description: This call copies the network adapter variables, including the MAC address, into the input buffer.
Note: The PermNodeAddress field must be valid after PXENV_START_UNDI and
PXENV_UNDI_STARTUP have been issued. All other fields must be valid after
PXENV_START_UNDI, PXENV_UNDI_STARTUP and PXENV_UNDI_INITIALIZE have been
called.
typedef struct {
PXENV_STATUS Status;
UINT16 BaseIo;
UINT16 IntNumber;
UINT16 MaxTranUnit;
UINT16 HwType;
#define ETHER_TYPE 1
#define EXP_ETHER_TYPE 2
#define IEEE_TYPE 6
#define ARCNET_TYPE 7
UINT16 HwAddrLen;
MAC_ADDR CurrentNodeAddress;
MAC_ADDR PermNodeAddress;
SEGSEL ROMAddress;
UINT16 RxBufCt;
UINT16 TxBufCt;
} PXENV_UNDI_GET_INFORMATION_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
BaseIO: Adapter base I/O address.
IntNumber: Adapter IRQ number.
MaxTranUnit: Adapter maximum transmit unit.
HWType: Type of protocol at the hardware level.
HWAddrLen: Length of the hardware address.
CurrentNodeAddress: Current hardware address.
PermNodeAddress: Permanent hardware address.
ROMAddress: Real mode ROM segment address.
RxBufCnt: Receive queue length.
TxBufCnt: Transmit queue length.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI GET STATISTICS
Op-Code: PXENV_UNDI_GET_STATISTICS (000Dh)
Input: Far pointer to a PXENV_UNDI_GET_STATISTICS_T parameter structure that has been initialized
by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call reads statistical information from the network adapter, and returns.
typedef struct {
PXENV_STATUS Status;
UINT32 XmtGoodFrames;
UINT32 RcvGoodFrames;
UINT32 RcvCRCErrors;
UINT32 RcvResourceErrors;
} PXENV_UNDI_GET_STATISTICS_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
XmtGoodFrames: Number of successful transmissions.
RcvGoodFrames: Number of good frames received.
RcvCRCErrors: Number of frames received with CRC
error.
RcvResourceErrors: Number of frames discarded
because receive queue was full.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI CLEAR STATISTICS
Op-Code: PXENV_UNDI_CLEAR_STATISTICS (000Eh)
Input: Far pointer to a PXENV_UNDI_CLEAR_STATISTICS_T parameter.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the
PXENV_STATUS_xxx constants.
Description: This call clears the statistical information from the network adapter.
typedef struct {
PXENV_STATUS Status;
} PXENV_UNDI_CLEAR_STATISTICS_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI INITIATE DIAGS
Op-Code: PXENV_UNDI_INITIATE_DIAGS (000Fh)
Input: Far pointer to a PXENV_UNDI_INITIATE_DIAGS_T parameter.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the
PXENV_STATUS_xxx constants.
Description: This call can be used to initiate the run-time diagnostics. It causes the network adapter to run
hardware diagnostics and to update its status information.
typedef struct {
PXENV_STATUS Status;
} PXENV_UNDI_INITIATE_DIAGS_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI FORCE INTERRUPT
Op-Code: PXENV_UNDI_FORCE_INTERRUPT (0010h)
Input: Far pointer to a PXENV_UNDI_FORCE_INTERRUPT_T parameter structure that has been
initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call forces the network adapter to generate an interrupt. When a receive interrupt occurs, the
network adapter driver usually queues the packet and calls the application's callback receive
routine with a pointer to the packet received. Then, the callback routine either can copy the packet
to its buffer or can decide to delay the copy to a later time. If the packet is not immediately copied,
the network adapter driver does not remove it from the input queue. When the application wants to
copy the packet, it can call the PXENV_UNDI_FORCE_INTERRUPT routine to simulate the receive
interrupt.
typedef struct {
PXENV_STATUS Status;
} PXENV_UNDI_FORCE_INTERRUPT_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI GET MULTICAST ADDRESS
Op-Code: PXENV_UNDI_GET_MCAST_ADDRESS (0011h)
Input: Far pointer to a PXENV_GET_MCAST_ADDRESS_t parameter structure that has been initialized
by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This call converts the given IP multicast address to a hardware multicast address.
typedef struct {
PXENV_STATUS Status;
IP4 InetAddr;
MAC_ADDR MediaAddr;
} PXENV_UNDI_GET_MCAST_ADDR_T;
Set before calling API service
InetAddr: IP multicast address.
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
MediaAddr: MAC multicast address.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI GET NIC TYPE
Op-Code: PXENV_UNDI_GET_NIC_TYPE (0012h)
Input: Far pointer to a PXENV_UNDI_GET_NIC_TYPE_T parameter structure that has been initialized by
the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants. If the PXENV_EXIT_SUCCESS is returned the parameter structure must contain the
NIC information.
Description: This call, if successful, provides the NIC-specific information necessary to identify the network
adapter that is used to boot the system.
Note: The application first gets the DHCPDISCOVER packet using GET_CACHED_INFO and checks if
the UNDI is supported before making this call. If the UNDI is not supported, the NIC-specific
information can be obtained from the DHCPDISCOVER packet itself.
PXENV_START_UNDI, PXENV_UNDI_STARTUP and PXENV_UNDI_INITIALIZE must be called
before the information provided is valid.
typedef {
PXENV_STATUS Status;
UINT8 NicType;
#define PCI_NIC 2
#define PnP_NIC 3
#define CardBus_NIC 4
Union {
Struct {
UINT16 Vendor_ID;
UINT16 Dev_ID;
UINT8 Base_Class;
UINT8 Sub_Class;
UINT8 Prog_Intf;
UINT8 Rev;
UINT16 BusDevFunc;
UINT16 SubVendor_ID;
UINT16 SubDevice_ID;
} pci, cardbus;
struct {
UINT32 EISA_Dev_ID;
UINT8 Base_Class;
UINT8 Sub_Class;
UINT8 Prog_Intf;
UINT16 CardSelNum;
} pnp;
} info;
} PXENV_UNDI_GET_NIC_TYPE_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
NICType: Type of NIC information stored in the parameter
structure.
Info: Information about the fields in this union can be found
in the [PnP] and [PCI] specifications
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI GET IFACE INFO
Op-Code: PXENV_UNDI_GET_IFACE_INFO (0013h)
Input: Far pointer to a PXENV_UNDI_GET_IFACE_INFO_t parameter structure that has been initialized
by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants. If the PXENV_EXIT_SUCCESS is returned, the parameter structure must contain the
interface specific information.
Description: This call, if successful, provides the network interface specific information such as the interface
type at the link layer (Ethernet, Tokenring) and the link speed. This information can be used in the
universal drivers such as NDIS or Miniport to communicate to the upper protocol modules.
Note: UNDI follows the NDIS2 specification in giving this information. It is the responsibility of the
universal driver to translate/convert this information into a format that is required in its specification
or to suit the expectation of the upper level protocol modules.
PXENV_START_UNDI, PXENV_UNDI_STARTUP and PXENV_UNDI_INITIALIZE must be called
before the information provided is valid.
typedef struct {
PXENV_STATUS Status
UINT8 IfaceType[16];
UINT32 LinkSpeed;
UINT32 ServiceFlags;
UINT32 Reserved[4];
} PXENV_UNDI_GET_NDIS_INFO_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
IfaceType: Name of MAC type in ASCIIZ format. This is
used by the universal NDIS driver to specify its driver type
to the protocol driver.
LinkSpeed: Defined in the NDIS 2.0 specification.
ServiceFlags: Defined in the NDIS 2.0 specification.
Reserved: Must be zero.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI ISR
Op-Code: PXENV_UNDI_ISR (0014h)
Input: Far pointer to a PXENV_UNDI_ISR_T parameter structure that has been initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This API function will be called at different levels of processing the interrupt. The FuncFlag field in
the parameter block indicates the operation to be performed for the call. This field is filled with the
status of that operation on return.
Note: Interrupt Service Routine Operation:
In this design the UNDI does not hook the interrupt for the Network Interface. Instead, the
application or the protocol driver hooks the interrupt and calls UNDI with the PXENV_UNDI_ISR
API call for interrupt verification (PXENV_UNDI_ISR_IN_START) and processing
(PXENV_UNDI_ISR_IN_PROCESS and PXENV_UNDI_ISR_GET_NEXT).
When the Network Interface HW generates an interrupt the protocol driver interrupt service
routine (ISR) gets control and takes care of the interrupt processing at the PIC level. The ISR then
calls the UNDI using the PXENV_UNDI_ISR API with the value PXENV_UNDI_ISR_IN_START for
the FuncFlag parameter. At this time UNDI must disable the interrupts at the Network Interface
level and read any status values required to further process the interrupt. UNDI must return as
quickly as possible with one of the two values, PXENV_UNDI_ISR_OUT_OURS or
PXENV_UNDI_ISR_OUT_NOT_OURS, for the parameter FuncFlag depending on whether the
interrupt was generated by this particular Network Interface or not.
If the value returned in FuncFlag is PXENV_UNDI_ISR_OUT_NOT_OURS, then the interrupt was
not generated by our NIC, and interrupt processing is complete.
If the value returned in FuncFlag is PXENV_UNDI_ISR_OUT_OURS, the protocol driver must start
a handler thread and send an end-of-interrupt (EOI) command to the PIC. Interrupt processing is
now complete.
The protocol driver strategy routine will call UNDI using this same API with FuncFlag equal to
PXENV_UNDI_ISR_IN_PROCESS. At this time UNDI must find the cause of this interrupt and
return the status in the FuncFlag. It first checks if there is a frame received and if so it returns the
first buffer pointer of that frame in the parameter block.
The protocol driver calls UNDI repeatedly with the FuncFlag equal to
PXENV_UNDI_ISR_IN_GET_NEXT to get all the buffers in a frame and also all the received
frames in the queue. On this call, UNDI must remember the previous buffer given to the protoco,l
remove it from the receive queue and recycle it. In case of a multi-buffered frame, if the previous
buffer is not the last buffer in the frame it must return the next buffer in the frame in the parameter
block. Otherwise it must return the first buffer in the next frame.
If there is no received frame pending to be processed, UNDI processes the transmit completes and
if there is no other interrupt status to be processed, UNDI re-enables the interrupt at the
NETWORK INTERFACE level and returns PXENV_UNDI_ISR_OUT_DONE in the FuncFlag.
IMPORTANT: It is possible for the protocol driver to be interrupted again while in the
strategy routine when the UNDI re-enables interrupts.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
STOP UNDI
Op-Code: PXENV_STOP_UNDI (0015h)
Input: Far pointer to a PXENV_STOP_UNDI_T parameter structure that has been initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This routine is responsible for unhooking the Int 1Ah service routine.
Note: This API service must be called only once at the end of UNDI Option ROM boot. One of the valid
status codes is PXENV_STATUS_KEEP. If this status is returned, UNDI must not be removed from
base memory. Also, UNDI must not be removed from base memory if BC is not removed from base
memory.
Service cannot be used in protected mode.
typedef struct {
PXENV_STATUS Status;
} PXENV_STOP_UNDI_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
PXE
UNDI GET STATE
Op-Code: PXENV_UNDI_GET_STATE (0015h)
Input: Far pointer to a PXENV_UNDI_GET_STATE_T parameter.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants. The UNDI_STATE field in the parameter structure must be set to one of the valid state
constants
Description: This call can be used to obtain state of the UNDI engine in order to avoid issuing adverse call
sequences
typedef struct {
#define PXE_UNDI_GET_STATE_STARTED 1
#define PXE_UNDI_GET_STATE_INITIALIZED 2
#define PXE_UNDI_GET_STATE_OPENED 3
PXENV_STATUS Status;
UINT8 UNDIstate;
} PXENV_UNDI_GET_STATE_T;
Set before calling API service
N/A
Returned from API service
Status: See the PXENV_STATUS_xxx constants.
State: See definitions of the state constants.
Note. UNDI implementation is responsible for maintaining
internal state machine.
UNDI ISR
Op-Code: PXENV_UNDI_ISR (0014h)
Input: Far pointer to a t_PXENV_UNDI_ISR parameter structure that has been initialized by the caller.
Output: PXENV_EXIT_SUCCESS or PXENV_EXIT_FAILURE must be returned in AX. The status field in
the parameter structure must be set to one of the values represented by the PXENV_STATUS_xxx
constants.
Description: This API function will be called at different levels of processing the interrupt. The FuncFlag field in
the parameter block indicates the operation to be performed for the call. This field is filled with the
status of that operation on return.
@param SimpleNetworkDevice Device instance
@param PxeUndiTable Point to structure which hold paramter and return value
for option ROM call.
@return Return value of PXE option ROM far call.
**/
)
;
/**
Effect the Far Call into the PXE Layer
Note: When using a 32-bit stack segment do not push 32-bit words onto the stack. The PXE API
services will not work, unless there are three 16-bit parameters pushed onto the stack.
push DS ;Far pointer to parameter structure
push offset pxe_data_call_struct ;is pushed onto stack.
push Index ;UINT16 is pushed onto stack.
call dword ptr (s_PXE ptr es:[di]).EntryPointSP
add sp, 6 ;Caller cleans up stack.
@param SimpleNetworkDevice Device instance for simple network
@param CallIndex The index of legacy call.
@return EFI_STATUS
**/
)
;
/**
Allocate buffer below 1M for real mode.
@param NumPages The number pages want to be allocated.
@param Buffer On return, allocated buffer.
@return Status of allocating pages.
**/
)
;
#endif