ShellPkg/Library/UefiShellLevel1CommandsLib/Stall.c

   1 /** @file
   2   Main file for stall shell level 1 function.
   3
   4   (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
   5   Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include "UefiShellLevel1CommandsLib.h"
  11
  12 /**
  13   Function for 'stall' command.
  14
  15   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  16   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  17 **/
  18 SHELL_STATUS
  19 EFIAPI
  20 ShellCommandRunStall (
  21   IN EFI_HANDLE        ImageHandle,
  22   IN EFI_SYSTEM_TABLE  *SystemTable
  23   )
  24 {
  25   EFI_STATUS    Status;
  26   LIST_ENTRY    *Package;
  27   CHAR16        *ProblemParam;
  28   SHELL_STATUS  ShellStatus;
  29   UINT64        Intermediate;
  30
  31   ShellStatus = SHELL_SUCCESS;
  32
  33   //
  34   // initialize the shell lib (we must be in non-auto-init...)
  35   //
  36   Status = ShellInitialize ();
  37   ASSERT_EFI_ERROR (Status);
  38
  39   Status = CommandInit ();
  40   ASSERT_EFI_ERROR (Status);
  41
  42   //
  43   // parse the command line
  44   //
  45   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  46   if (EFI_ERROR (Status)) {
  47     if ((Status == EFI_VOLUME_CORRUPTED) && (ProblemParam != NULL)) {
  48       ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel1HiiHandle, L"stall", ProblemParam);
  49       FreePool (ProblemParam);
  50       ShellStatus = SHELL_INVALID_PARAMETER;
  51     } else {
  52       ASSERT (FALSE);
  53     }
  54   } else {
  55     if (ShellCommandLineGetRawValue (Package, 2) != NULL) {
  56       ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle, L"stall");
  57       ShellStatus = SHELL_INVALID_PARAMETER;
  58     } else if (ShellCommandLineGetRawValue (Package, 1) == NULL) {
  59       ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle, L"stall");
  60       ShellStatus = SHELL_INVALID_PARAMETER;
  61     } else {
  62       Status = ShellConvertStringToUint64 (ShellCommandLineGetRawValue (Package, 1), &Intermediate, FALSE, FALSE);
  63       if (EFI_ERROR (Status) || (((UINT64)(UINTN)(Intermediate)) != Intermediate)) {
  64         ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_INV), gShellLevel1HiiHandle, L"stall", ShellCommandLineGetRawValue (Package, 1));
  65         ShellStatus = SHELL_INVALID_PARAMETER;
  66       } else {
  67         Status = gBS->Stall ((UINTN)Intermediate);
  68         if (EFI_ERROR (Status)) {
  69           ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_STALL_FAILED), gShellLevel1HiiHandle, L"stall");
  70           ShellStatus = SHELL_DEVICE_ERROR;
  71         }
  72       }
  73     }
  74
  75     ShellCommandLineFreeVarList (Package);
  76   }
  77
  78   return (ShellStatus);
  79 }