[PATCH] ShellPkg/reset: Support "-fwui" flag

[Ruiyu Ni <ruiyu.ni@intel.com>]

From: Chen A Chen <chen.a.chen@intel.com>

The patch adds "-fwui" support to reset command which is newly added
to Shell 2.2 spec.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen A Chen <chen.a.chen@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Jaben Carsey <jaben.carsey@intel.com>
---
 .../Library/UefiShellLevel2CommandsLib/Reset.c     | 48 +++++++++++++++++++---
 .../UefiShellLevel2CommandsLib.h                   |  1 +
 2 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/Reset.c b/ShellPkg/Library/UefiShellLevel2CommandsLib/Reset.c
index 7d4cfb4..40ad8d9 100644
--- a/ShellPkg/Library/UefiShellLevel2CommandsLib/Reset.c
+++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/Reset.c
@@ -2,7 +2,7 @@
   Main file for attrib shell level 2 function.
 
   (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
-  Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2009 - 2016, 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
@@ -16,10 +16,11 @@
 #include "UefiShellLevel2CommandsLib.h"
 
 STATIC CONST SHELL_PARAM_ITEM ResetParamList[] = {
-  {L"-w", TypeValue},
-  {L"-s", TypeValue},
-  {L"-c", TypeValue},
-  {NULL, TypeMax}
+  {L"-w",    TypeValue},
+  {L"-s",    TypeValue},
+  {L"-c",    TypeValue},
+  {L"-fwui", TypeFlag },
+  {NULL,     TypeMax  }
   };
 
 /**
@@ -40,6 +41,9 @@ ShellCommandRunReset (
   CONST CHAR16  *String;
   CHAR16        *ProblemParam;
   SHELL_STATUS  ShellStatus;
+  UINT64        OsIndications;
+  UINT32        Attr;
+  UINTN         DataSize;
 
   ShellStatus = SHELL_SUCCESS;
   ProblemParam = NULL;
@@ -72,6 +76,39 @@ ShellCommandRunReset (
       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"reset");  
       ShellStatus = SHELL_INVALID_PARAMETER;
     } else {
+
+      if (ShellCommandLineGetFlag (Package, L"-fwui")) {
+
+        DataSize  = sizeof (OsIndications);
+        Status = gRT->GetVariable (
+                        EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME, &gEfiGlobalVariableGuid,
+                        &Attr, &DataSize, &OsIndications
+                        );
+        if (!EFI_ERROR (Status)) {
+          if ((OsIndications & EFI_OS_INDICATIONS_BOOT_TO_FW_UI) != 0) {
+            DataSize = sizeof (OsIndications);
+            Status = gRT->GetVariable (
+                            EFI_OS_INDICATIONS_VARIABLE_NAME, &gEfiGlobalVariableGuid,
+                            &Attr, &DataSize, &OsIndications
+                            );
+            if (!EFI_ERROR (Status)) {
+              OsIndications |= EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
+            } else {
+              OsIndications = EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
+            }
+            Status = gRT->SetVariable (
+                            EFI_OS_INDICATIONS_VARIABLE_NAME, &gEfiGlobalVariableGuid,
+                            EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+                            sizeof (OsIndications), &OsIndications
+                            );
+          }
+        }
+        if (EFI_ERROR (Status)) {
+          ShellStatus = SHELL_UNSUPPORTED;
+          goto Error;
+        }
+      }
+
       //
       // check for warm reset flag, then shutdown reset flag, then cold (default) reset flag
       //
@@ -119,6 +156,7 @@ ShellCommandRunReset (
   // as the ResetSystem function should not return...
   //
 
+Error:
   //
   // free the command line package
   //
diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.h b/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.h
index c262bb5..857487f 100644
--- a/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.h
+++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/UefiShellLevel2CommandsLib.h
@@ -25,6 +25,7 @@
 
 #include <Uefi.h>
 
+#include <Guid/GlobalVariable.h>
 #include <Guid/ShellLibHiiGuid.h>
 
 #include <Protocol/Shell.h>
-- 
2.9.0.windows.1