ShellPkg/Library/UefiShellLevel1CommandsLib/Stall.c

   1 /** @file
   2   Main file for stall shell level 1 function.
   3
   4   Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "UefiShellLevel1CommandsLib.h"
  16
  17 /**
  18   Function for 'stall' command.
  19
  20   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  21   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  22 **/
  23 SHELL_STATUS
  24 EFIAPI
  25 ShellCommandRunStall (
  26   IN EFI_HANDLE        ImageHandle,
  27   IN EFI_SYSTEM_TABLE  *SystemTable
  28   )
  29 {
  30   EFI_STATUS          Status;
  31   LIST_ENTRY          *Package;
  32   CHAR16              *ProblemParam;
  33   SHELL_STATUS        ShellStatus;
  34   UINT64              Intermediate;
  35
  36   ShellStatus         = SHELL_SUCCESS;
  37
  38   //
  39   // initialize the shell lib (we must be in non-auto-init...)
  40   //
  41   Status = ShellInitialize();
  42   ASSERT_EFI_ERROR(Status);
  43
  44   Status = CommandInit();
  45   ASSERT_EFI_ERROR(Status);
  46
  47   //
  48   // parse the command line
  49   //
  50   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  51   if (EFI_ERROR(Status)) {
  52     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  53       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel1HiiHandle, ProblemParam);
  54       FreePool(ProblemParam);
  55       ShellStatus = SHELL_INVALID_PARAMETER;
  56     } else {
  57       ASSERT(FALSE);
  58     }
  59   } else {
  60     if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  61       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle);
  62       ShellStatus = SHELL_INVALID_PARAMETER;
  63     } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
  64       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
  65       ShellStatus = SHELL_INVALID_PARAMETER;
  66     } else {
  67       Status = ShellConvertStringToUint64(ShellCommandLineGetRawValue(Package, 1), &Intermediate, FALSE, FALSE);
  68       if (EFI_ERROR(Status) || ((UINT64)(UINTN)(Intermediate)) != Intermediate) {
  69         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM_VAL), gShellLevel1HiiHandle, ShellCommandLineGetRawValue(Package, 1));
  70         ShellStatus = SHELL_INVALID_PARAMETER;
  71       } else {
  72         Status = gBS->Stall((UINTN)Intermediate);
  73         if (EFI_ERROR(Status)) {
  74           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_STALL_FAILED), gShellLevel1HiiHandle, Status);
  75           ShellStatus = SHELL_DEVICE_ERROR;
  76         }
  77       }
  78     }
  79     ShellCommandLineFreeVarList (Package);
  80   }
  81   return (ShellStatus);
  82 }
  83