2 files changed, 79 insertions, 0 deletions
diff --git a/ArmPkg/Library/OpteeLib/Optee.c b/ArmPkg/Library/OpteeLib/Optee.c
new file mode 100644
index 0000000000..574527f8b5
--- /dev/null
+++ b/ArmPkg/Library/OpteeLib/Optee.c
@@ -0,0 +1,46 @@
+/** @file
+  Api's to communicate with OP-TEE OS (Trusted OS based on ARM TrustZone) via
+  secure monitor calls.
+
+  Copyright (c) 2018, Linaro Ltd. 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
+  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.
+
+**/
+
+#include <Library/ArmSmcLib.h>
+#include <Library/BaseLib.h>
+#include <Library/OpteeLib.h>
+
+#include <IndustryStandard/ArmStdSmc.h>
+
+/**
+  Check for OP-TEE presence.
+**/
+BOOLEAN
+EFIAPI
+IsOpteePresent (
+  VOID
+  )
+{
+  ARM_SMC_ARGS ArmSmcArgs;
+
+  // Send a Trusted OS Calls UID command
+  ArmSmcArgs.Arg0 = ARM_SMC_ID_TOS_UID;
+  ArmCallSmc (&ArmSmcArgs);
+
+  if ((ArmSmcArgs.Arg0 == OPTEE_OS_UID0) &&
+      (ArmSmcArgs.Arg1 == OPTEE_OS_UID1) &&
+      (ArmSmcArgs.Arg2 == OPTEE_OS_UID2) &&
+      (ArmSmcArgs.Arg3 == OPTEE_OS_UID3)) {
+    return TRUE;
+  } else {
+    return FALSE;
+  }
+}
diff --git a/ArmPkg/Library/OpteeLib/OpteeLib.inf b/ArmPkg/Library/OpteeLib/OpteeLib.inf
new file mode 100644
index 0000000000..5abd427379
--- /dev/null
+++ b/ArmPkg/Library/OpteeLib/OpteeLib.inf
@@ -0,0 +1,33 @@
+#/** @file
+#  OP-TEE lib using secure monitor calls
+#
+#  Copyright (c) 2018, Linaro Ltd. 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
+#  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.
+#
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x0001001A
+  BASE_NAME                      = OpteeLib
+  FILE_GUID                      = BCD50D08-9568-45B2-84DF-30AE0279AD46
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = OpteeLib
+
+[Sources]
+  Optee.c
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  ArmSmcLib
+  BaseLib