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| author | Sumit Garg <sumit.garg@linaro.org> | 2018-08-01 11:37:41 +0530 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-08-01 11:03:45 +0200 |
| commit | d65b78f101b3f2845dc20b9556faf3f14904f3c5 (patch) | |
| tree | c423d6e0041b922a6033e68b3f45472ad528362b /ArmPkg/Library/OpteeLib/Optee.c | |
| parent | 52437cb7633bc1811c53899c8981364c71246a26 (diff) | |
| download | edk2-d65b78f101b3f2845dc20b9556faf3f14904f3c5.tar.gz edk2-d65b78f101b3f2845dc20b9556faf3f14904f3c5.tar.bz2 edk2-d65b78f101b3f2845dc20b9556faf3f14904f3c5.zip | |
ArmPkg: Add initial OpteeLib implementation
This is initial version of OP-TEE library that provides api's to
communicate with OP-TEE OS (Trusted OS based on ARM TrustZone) via
secure monitor calls. Currently it provides basic api to detect OP-TEE
presence via UID matching.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Diffstat (limited to 'ArmPkg/Library/OpteeLib/Optee.c')
| -rw-r--r-- | ArmPkg/Library/OpteeLib/Optee.c | 46 |
1 files changed, 46 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;
+ }
+}
|