473 строки
15 KiB
C
473 строки
15 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
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/*
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* Copyright (c) 2015-2021, Linaro Limited
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*/
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#ifndef OPTEE_SMC_H
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#define OPTEE_SMC_H
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#include <linux/arm-smccc.h>
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#include <linux/bitops.h>
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#define OPTEE_SMC_STD_CALL_VAL(func_num) \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
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#define OPTEE_SMC_FAST_CALL_VAL(func_num) \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
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/*
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* Function specified by SMC Calling convention.
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*/
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#define OPTEE_SMC_FUNCID_CALLS_COUNT 0xFF00
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#define OPTEE_SMC_CALLS_COUNT \
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ARM_SMCCC_CALL_VAL(OPTEE_SMC_FAST_CALL, SMCCC_SMC_32, \
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SMCCC_OWNER_TRUSTED_OS_END, \
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OPTEE_SMC_FUNCID_CALLS_COUNT)
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/*
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* Normal cached memory (write-back), shareable for SMP systems and not
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* shareable for UP systems.
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*/
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#define OPTEE_SMC_SHM_CACHED 1
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/*
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* a0..a7 is used as register names in the descriptions below, on arm32
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* that translates to r0..r7 and on arm64 to w0..w7. In both cases it's
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* 32-bit registers.
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*/
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/*
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* Function specified by SMC Calling convention
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*
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* Return the following UID if using API specified in this file
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* without further extensions:
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* 384fb3e0-e7f8-11e3-af63-0002a5d5c51b.
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* see also OPTEE_MSG_UID_* in optee_msg.h
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*/
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#define OPTEE_SMC_FUNCID_CALLS_UID OPTEE_MSG_FUNCID_CALLS_UID
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#define OPTEE_SMC_CALLS_UID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_TRUSTED_OS_END, \
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OPTEE_SMC_FUNCID_CALLS_UID)
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/*
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* Function specified by SMC Calling convention
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*
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* Returns 2.0 if using API specified in this file without further extensions.
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* see also OPTEE_MSG_REVISION_* in optee_msg.h
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*/
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#define OPTEE_SMC_FUNCID_CALLS_REVISION OPTEE_MSG_FUNCID_CALLS_REVISION
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#define OPTEE_SMC_CALLS_REVISION \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_TRUSTED_OS_END, \
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OPTEE_SMC_FUNCID_CALLS_REVISION)
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struct optee_smc_calls_revision_result {
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unsigned long major;
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unsigned long minor;
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unsigned long reserved0;
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unsigned long reserved1;
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};
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/*
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* Get UUID of Trusted OS.
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*
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* Used by non-secure world to figure out which Trusted OS is installed.
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* Note that returned UUID is the UUID of the Trusted OS, not of the API.
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*
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* Returns UUID in a0-4 in the same way as OPTEE_SMC_CALLS_UID
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* described above.
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*/
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#define OPTEE_SMC_FUNCID_GET_OS_UUID OPTEE_MSG_FUNCID_GET_OS_UUID
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#define OPTEE_SMC_CALL_GET_OS_UUID \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_UUID)
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/*
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* Get revision of Trusted OS.
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*
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* Used by non-secure world to figure out which version of the Trusted OS
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* is installed. Note that the returned revision is the revision of the
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* Trusted OS, not of the API.
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*
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* Returns revision in a0-1 in the same way as OPTEE_SMC_CALLS_REVISION
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* described above. May optionally return a 32-bit build identifier in a2,
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* with zero meaning unspecified.
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*/
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#define OPTEE_SMC_FUNCID_GET_OS_REVISION OPTEE_MSG_FUNCID_GET_OS_REVISION
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#define OPTEE_SMC_CALL_GET_OS_REVISION \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_REVISION)
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struct optee_smc_call_get_os_revision_result {
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unsigned long major;
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unsigned long minor;
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unsigned long build_id;
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unsigned long reserved1;
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};
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/*
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* Call with struct optee_msg_arg as argument
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*
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* Call register usage:
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* a0 SMC Function ID, OPTEE_SMC*CALL_WITH_ARG
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* a1 Upper 32 bits of a 64-bit physical pointer to a struct optee_msg_arg
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* a2 Lower 32 bits of a 64-bit physical pointer to a struct optee_msg_arg
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* a3 Cache settings, not used if physical pointer is in a predefined shared
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* memory area else per OPTEE_SMC_SHM_*
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* a4-6 Not used
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* a7 Hypervisor Client ID register
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*
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* Normal return register usage:
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* a0 Return value, OPTEE_SMC_RETURN_*
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* a1-3 Not used
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* a4-7 Preserved
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*
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* OPTEE_SMC_RETURN_ETHREAD_LIMIT return register usage:
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* a0 Return value, OPTEE_SMC_RETURN_ETHREAD_LIMIT
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* a1-3 Preserved
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* a4-7 Preserved
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*
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* RPC return register usage:
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* a0 Return value, OPTEE_SMC_RETURN_IS_RPC(val)
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* a1-2 RPC parameters
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* a3-7 Resume information, must be preserved
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*
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* Possible return values:
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* OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
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* function.
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* OPTEE_SMC_RETURN_OK Call completed, result updated in
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* the previously supplied struct
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* optee_msg_arg.
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* OPTEE_SMC_RETURN_ETHREAD_LIMIT Number of Trusted OS threads exceeded,
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* try again later.
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* OPTEE_SMC_RETURN_EBADADDR Bad physical pointer to struct
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* optee_msg_arg.
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* OPTEE_SMC_RETURN_EBADCMD Bad/unknown cmd in struct optee_msg_arg
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* OPTEE_SMC_RETURN_IS_RPC() Call suspended by RPC call to normal
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* world.
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*/
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#define OPTEE_SMC_FUNCID_CALL_WITH_ARG OPTEE_MSG_FUNCID_CALL_WITH_ARG
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#define OPTEE_SMC_CALL_WITH_ARG \
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OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_ARG)
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/*
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* Get Shared Memory Config
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*
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* Returns the Secure/Non-secure shared memory config.
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*
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* Call register usage:
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* a0 SMC Function ID, OPTEE_SMC_GET_SHM_CONFIG
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* a1-6 Not used
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* a7 Hypervisor Client ID register
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*
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* Have config return register usage:
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* a0 OPTEE_SMC_RETURN_OK
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* a1 Physical address of start of SHM
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* a2 Size of of SHM
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* a3 Cache settings of memory, as defined by the
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* OPTEE_SMC_SHM_* values above
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* a4-7 Preserved
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*
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* Not available register usage:
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* a0 OPTEE_SMC_RETURN_ENOTAVAIL
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* a1-3 Not used
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* a4-7 Preserved
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*/
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#define OPTEE_SMC_FUNCID_GET_SHM_CONFIG 7
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#define OPTEE_SMC_GET_SHM_CONFIG \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_SHM_CONFIG)
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struct optee_smc_get_shm_config_result {
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unsigned long status;
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unsigned long start;
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unsigned long size;
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unsigned long settings;
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};
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/*
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* Exchanges capabilities between normal world and secure world
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*
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* Call register usage:
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* a0 SMC Function ID, OPTEE_SMC_EXCHANGE_CAPABILITIES
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* a1 bitfield of normal world capabilities OPTEE_SMC_NSEC_CAP_*
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* a2-6 Not used
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* a7 Hypervisor Client ID register
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*
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* Normal return register usage:
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* a0 OPTEE_SMC_RETURN_OK
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* a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
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* a2-7 Preserved
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*
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* Error return register usage:
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* a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world
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* a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
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* a2-7 Preserved
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*/
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/* Normal world works as a uniprocessor system */
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#define OPTEE_SMC_NSEC_CAP_UNIPROCESSOR BIT(0)
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/* Secure world has reserved shared memory for normal world to use */
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#define OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM BIT(0)
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/* Secure world can communicate via previously unregistered shared memory */
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#define OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM BIT(1)
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/*
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* Secure world supports commands "register/unregister shared memory",
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* secure world accepts command buffers located in any parts of non-secure RAM
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*/
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#define OPTEE_SMC_SEC_CAP_DYNAMIC_SHM BIT(2)
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/* Secure world is built with virtualization support */
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#define OPTEE_SMC_SEC_CAP_VIRTUALIZATION BIT(3)
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/* Secure world supports Shared Memory with a NULL reference */
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#define OPTEE_SMC_SEC_CAP_MEMREF_NULL BIT(4)
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#define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9
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#define OPTEE_SMC_EXCHANGE_CAPABILITIES \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES)
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struct optee_smc_exchange_capabilities_result {
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unsigned long status;
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unsigned long capabilities;
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unsigned long reserved0;
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unsigned long reserved1;
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};
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/*
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* Disable and empties cache of shared memory objects
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*
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* Secure world can cache frequently used shared memory objects, for
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* example objects used as RPC arguments. When secure world is idle this
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* function returns one shared memory reference to free. To disable the
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* cache and free all cached objects this function has to be called until
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* it returns OPTEE_SMC_RETURN_ENOTAVAIL.
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*
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* Call register usage:
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* a0 SMC Function ID, OPTEE_SMC_DISABLE_SHM_CACHE
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* a1-6 Not used
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* a7 Hypervisor Client ID register
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*
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* Normal return register usage:
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* a0 OPTEE_SMC_RETURN_OK
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* a1 Upper 32 bits of a 64-bit Shared memory cookie
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* a2 Lower 32 bits of a 64-bit Shared memory cookie
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* a3-7 Preserved
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*
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* Cache empty return register usage:
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* a0 OPTEE_SMC_RETURN_ENOTAVAIL
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* a1-7 Preserved
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*
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* Not idle return register usage:
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* a0 OPTEE_SMC_RETURN_EBUSY
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* a1-7 Preserved
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*/
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#define OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE 10
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#define OPTEE_SMC_DISABLE_SHM_CACHE \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE)
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struct optee_smc_disable_shm_cache_result {
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unsigned long status;
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unsigned long shm_upper32;
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unsigned long shm_lower32;
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unsigned long reserved0;
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};
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/*
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* Enable cache of shared memory objects
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*
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* Secure world can cache frequently used shared memory objects, for
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* example objects used as RPC arguments. When secure world is idle this
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* function returns OPTEE_SMC_RETURN_OK and the cache is enabled. If
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* secure world isn't idle OPTEE_SMC_RETURN_EBUSY is returned.
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*
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* Call register usage:
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* a0 SMC Function ID, OPTEE_SMC_ENABLE_SHM_CACHE
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* a1-6 Not used
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* a7 Hypervisor Client ID register
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*
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* Normal return register usage:
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* a0 OPTEE_SMC_RETURN_OK
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* a1-7 Preserved
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*
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* Not idle return register usage:
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* a0 OPTEE_SMC_RETURN_EBUSY
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* a1-7 Preserved
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*/
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#define OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE 11
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#define OPTEE_SMC_ENABLE_SHM_CACHE \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE)
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/*
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* Query OP-TEE about number of supported threads
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*
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* Normal World OS or Hypervisor issues this call to find out how many
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* threads OP-TEE supports. That is how many standard calls can be issued
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* in parallel before OP-TEE will return OPTEE_SMC_RETURN_ETHREAD_LIMIT.
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*
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* Call requests usage:
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* a0 SMC Function ID, OPTEE_SMC_GET_THREAD_COUNT
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* a1-6 Not used
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* a7 Hypervisor Client ID register
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*
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* Normal return register usage:
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* a0 OPTEE_SMC_RETURN_OK
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* a1 Number of threads
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* a2-7 Preserved
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*
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* Error return:
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* a0 OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Requested call is not implemented
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* a1-7 Preserved
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*/
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#define OPTEE_SMC_FUNCID_GET_THREAD_COUNT 15
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#define OPTEE_SMC_GET_THREAD_COUNT \
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OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_THREAD_COUNT)
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/*
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* Resume from RPC (for example after processing a foreign interrupt)
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*
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* Call register usage:
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* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC
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* a1-3 Value of a1-3 when OPTEE_SMC_CALL_WITH_ARG returned
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* OPTEE_SMC_RETURN_RPC in a0
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*
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* Return register usage is the same as for OPTEE_SMC_*CALL_WITH_ARG above.
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*
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* Possible return values
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* OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
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* function.
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* OPTEE_SMC_RETURN_OK Original call completed, result
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* updated in the previously supplied.
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* struct optee_msg_arg
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* OPTEE_SMC_RETURN_RPC Call suspended by RPC call to normal
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* world.
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* OPTEE_SMC_RETURN_ERESUME Resume failed, the opaque resume
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* information was corrupt.
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*/
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#define OPTEE_SMC_FUNCID_RETURN_FROM_RPC 3
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#define OPTEE_SMC_CALL_RETURN_FROM_RPC \
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OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_RETURN_FROM_RPC)
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#define OPTEE_SMC_RETURN_RPC_PREFIX_MASK 0xFFFF0000
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#define OPTEE_SMC_RETURN_RPC_PREFIX 0xFFFF0000
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#define OPTEE_SMC_RETURN_RPC_FUNC_MASK 0x0000FFFF
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#define OPTEE_SMC_RETURN_GET_RPC_FUNC(ret) \
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((ret) & OPTEE_SMC_RETURN_RPC_FUNC_MASK)
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#define OPTEE_SMC_RPC_VAL(func) ((func) | OPTEE_SMC_RETURN_RPC_PREFIX)
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/*
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* Allocate memory for RPC parameter passing. The memory is used to hold a
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* struct optee_msg_arg.
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*
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* "Call" register usage:
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* a0 This value, OPTEE_SMC_RETURN_RPC_ALLOC
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* a1 Size in bytes of required argument memory
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* a2 Not used
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* a3 Resume information, must be preserved
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* a4-5 Not used
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* a6-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
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* a1 Upper 32 bits of 64-bit physical pointer to allocated
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* memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
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* be allocated.
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* a2 Lower 32 bits of 64-bit physical pointer to allocated
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* memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
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* be allocated
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* a3 Preserved
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* a4 Upper 32 bits of 64-bit Shared memory cookie used when freeing
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* the memory or doing an RPC
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* a5 Lower 32 bits of 64-bit Shared memory cookie used when freeing
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* the memory or doing an RPC
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* a6-7 Preserved
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*/
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#define OPTEE_SMC_RPC_FUNC_ALLOC 0
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#define OPTEE_SMC_RETURN_RPC_ALLOC \
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OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_ALLOC)
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/*
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* Free memory previously allocated by OPTEE_SMC_RETURN_RPC_ALLOC
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*
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* "Call" register usage:
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* a0 This value, OPTEE_SMC_RETURN_RPC_FREE
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* a1 Upper 32 bits of 64-bit shared memory cookie belonging to this
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* argument memory
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* a2 Lower 32 bits of 64-bit shared memory cookie belonging to this
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* argument memory
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* a3-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
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* a1-2 Not used
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* a3-7 Preserved
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*/
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#define OPTEE_SMC_RPC_FUNC_FREE 2
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#define OPTEE_SMC_RETURN_RPC_FREE \
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OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FREE)
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/*
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* Deliver a foreign interrupt in normal world.
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*
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* "Call" register usage:
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* a0 OPTEE_SMC_RETURN_RPC_FOREIGN_INTR
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* a1-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
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* a1-7 Preserved
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*/
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#define OPTEE_SMC_RPC_FUNC_FOREIGN_INTR 4
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#define OPTEE_SMC_RETURN_RPC_FOREIGN_INTR \
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OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FOREIGN_INTR)
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/*
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* Do an RPC request. The supplied struct optee_msg_arg tells which
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* request to do and the parameters for the request. The following fields
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* are used (the rest are unused):
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* - cmd the Request ID
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* - ret return value of the request, filled in by normal world
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* - num_params number of parameters for the request
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* - params the parameters
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* - param_attrs attributes of the parameters
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*
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* "Call" register usage:
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* a0 OPTEE_SMC_RETURN_RPC_CMD
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* a1 Upper 32 bits of a 64-bit Shared memory cookie holding a
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* struct optee_msg_arg, must be preserved, only the data should
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* be updated
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* a2 Lower 32 bits of a 64-bit Shared memory cookie holding a
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* struct optee_msg_arg, must be preserved, only the data should
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* be updated
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* a3-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
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* a1-2 Not used
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* a3-7 Preserved
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*/
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#define OPTEE_SMC_RPC_FUNC_CMD 5
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#define OPTEE_SMC_RETURN_RPC_CMD \
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OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_CMD)
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/* Returned in a0 */
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#define OPTEE_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF
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/* Returned in a0 only from Trusted OS functions */
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#define OPTEE_SMC_RETURN_OK 0x0
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#define OPTEE_SMC_RETURN_ETHREAD_LIMIT 0x1
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#define OPTEE_SMC_RETURN_EBUSY 0x2
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#define OPTEE_SMC_RETURN_ERESUME 0x3
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#define OPTEE_SMC_RETURN_EBADADDR 0x4
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#define OPTEE_SMC_RETURN_EBADCMD 0x5
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#define OPTEE_SMC_RETURN_ENOMEM 0x6
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#define OPTEE_SMC_RETURN_ENOTAVAIL 0x7
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#define OPTEE_SMC_RETURN_IS_RPC(ret) __optee_smc_return_is_rpc((ret))
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static inline bool __optee_smc_return_is_rpc(u32 ret)
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{
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return ret != OPTEE_SMC_RETURN_UNKNOWN_FUNCTION &&
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(ret & OPTEE_SMC_RETURN_RPC_PREFIX_MASK) ==
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OPTEE_SMC_RETURN_RPC_PREFIX;
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}
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#endif /* OPTEE_SMC_H */
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