mirror of https://github.com/acidanthera/audk.git
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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/** @file
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Api's to communicate with OP-TEE OS (Trusted OS based on ARM TrustZone) via
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secure monitor calls.
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Copyright (c) 2018, Linaro Ltd. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/ArmSmcLib.h>
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#include <Library/BaseLib.h>
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#include <Library/OpteeLib.h>
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#include <IndustryStandard/ArmStdSmc.h>
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/**
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Check for OP-TEE presence.
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**/
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BOOLEAN
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EFIAPI
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IsOpteePresent (
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VOID
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)
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{
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ARM_SMC_ARGS ArmSmcArgs;
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// Send a Trusted OS Calls UID command
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ArmSmcArgs.Arg0 = ARM_SMC_ID_TOS_UID;
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ArmCallSmc (&ArmSmcArgs);
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if ((ArmSmcArgs.Arg0 == OPTEE_OS_UID0) &&
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(ArmSmcArgs.Arg1 == OPTEE_OS_UID1) &&
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(ArmSmcArgs.Arg2 == OPTEE_OS_UID2) &&
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(ArmSmcArgs.Arg3 == OPTEE_OS_UID3)) {
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return TRUE;
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} else {
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return FALSE;
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}
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}
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