reset.c

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· C语言 代码 · 共 129 行

/*++
Copyright (c) 2004 - 2005, Intel Corporation                                                         
All rights reserved. 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        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module name:
  reset.c

Abstract:

Revision history:
  2000-Feb-09 M(f)J   Genesis.
--*/

#include "snp.h"

EFI_STATUS
pxe_reset (
  SNP_DRIVER *snp
  )
/*++

Routine Description:
 This routine calls undi to reset the nic.

Arguments:
 snp - pointer to the snp driver structure

Returns:
 EFI_SUCCESSFUL for a successful completion
 other for failed calls

--*/
{
  snp->cdb.OpCode     = PXE_OPCODE_RESET;
  snp->cdb.OpFlags    = PXE_OPFLAGS_NOT_USED;
  snp->cdb.CPBsize    = PXE_CPBSIZE_NOT_USED;
  snp->cdb.DBsize     = PXE_DBSIZE_NOT_USED;
  snp->cdb.CPBaddr    = PXE_CPBADDR_NOT_USED;
  snp->cdb.DBaddr     = PXE_DBADDR_NOT_USED;
  snp->cdb.StatCode   = PXE_STATCODE_INITIALIZE;
  snp->cdb.StatFlags  = PXE_STATFLAGS_INITIALIZE;
  snp->cdb.IFnum      = snp->if_num;
  snp->cdb.Control    = PXE_CONTROL_LAST_CDB_IN_LIST;

  //
  // Issue UNDI command and check result.
  //
  DEBUG ((EFI_D_NET, "\nsnp->undi.reset()  "));

  (*snp->issue_undi32_command) ((UINT64)(UINTN) &snp->cdb);

  if (snp->cdb.StatCode != PXE_STATCODE_SUCCESS) {
    DEBUG (
      (EFI_D_WARN,
      "\nsnp->undi32.reset()  %xh:%xh\n",
      snp->cdb.StatFlags,
      snp->cdb.StatCode)
      );

    //
    // UNDI could not be reset. Return UNDI error.
    //
    return EFI_DEVICE_ERROR;
  }

  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
snp_undi32_reset (
  IN EFI_SIMPLE_NETWORK_PROTOCOL *this,
  IN BOOLEAN                     ExtendedVerification
  )
/*++

Routine Description:
 This is the SNP interface routine for resetting the NIC
 This routine basically retrieves snp structure, checks the SNP state and
 calls the pxe_reset routine to actually do the reset!

Arguments:
 this - context pointer
 ExtendedVerification - not implemented

Returns:

--*/
{
  SNP_DRIVER  *snp;

  //
  // Resolve Warning 4 unreferenced parameter problem
  //
  ExtendedVerification = 0;

  if (this == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (this);

  if (snp == NULL) {
    return EFI_DEVICE_ERROR;
  }

  switch (snp->mode.State) {
  case EfiSimpleNetworkInitialized:
    break;

  case EfiSimpleNetworkStopped:
    return EFI_NOT_STARTED;

  case EfiSimpleNetworkStarted:
    return EFI_DEVICE_ERROR;

  default:
    return EFI_DEVICE_ERROR;
  }

  return pxe_reset (snp);
}