/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */ /* * Copyright (c) 2015-2021, Linaro Limited */ #ifndef OPTEE_SMC_H #define OPTEE_SMC_H #include <linux/arm-smccc.h> #include <linux/bitops.h> #define OPTEE_SMC_STD_CALL_VAL(func_num) \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \ ARM_SMCCC_OWNER_TRUSTED_OS, (func_num)) #define OPTEE_SMC_FAST_CALL_VAL(func_num) \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \ ARM_SMCCC_OWNER_TRUSTED_OS, (func_num)) /* * Function specified by SMC Calling convention. */ #define OPTEE_SMC_FUNCID_CALLS_COUNT 0xFF00 #define OPTEE_SMC_CALLS_COUNT \ ARM_SMCCC_CALL_VAL(OPTEE_SMC_FAST_CALL, SMCCC_SMC_32, \ SMCCC_OWNER_TRUSTED_OS_END, \ OPTEE_SMC_FUNCID_CALLS_COUNT) /* * Normal cached memory (write-back), shareable for SMP systems and not * shareable for UP systems. */ #define OPTEE_SMC_SHM_CACHED 1 /* * a0..a7 is used as register names in the descriptions below, on arm32 * that translates to r0..r7 and on arm64 to w0..w7. In both cases it's * 32-bit registers. */ /* * Function specified by SMC Calling convention * * Return the following UID if using API specified in this file * without further extensions: * 384fb3e0-e7f8-11e3-af63-0002a5d5c51b. * see also OPTEE_MSG_UID_* in optee_msg.h */ #define OPTEE_SMC_FUNCID_CALLS_UID OPTEE_MSG_FUNCID_CALLS_UID #define OPTEE_SMC_CALLS_UID \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \ ARM_SMCCC_OWNER_TRUSTED_OS_END, \ OPTEE_SMC_FUNCID_CALLS_UID) /* * Function specified by SMC Calling convention * * Returns 2.0 if using API specified in this file without further extensions. * see also OPTEE_MSG_REVISION_* in optee_msg.h */ #define OPTEE_SMC_FUNCID_CALLS_REVISION OPTEE_MSG_FUNCID_CALLS_REVISION #define OPTEE_SMC_CALLS_REVISION \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \ ARM_SMCCC_OWNER_TRUSTED_OS_END, \ OPTEE_SMC_FUNCID_CALLS_REVISION) struct optee_smc_calls_revision_result { unsigned long major; unsigned long minor; unsigned long reserved0; unsigned long reserved1; }; /* * Get UUID of Trusted OS. * * Used by non-secure world to figure out which Trusted OS is installed. * Note that returned UUID is the UUID of the Trusted OS, not of the API. * * Returns UUID in a0-4 in the same way as OPTEE_SMC_CALLS_UID * described above. */ #define OPTEE_SMC_FUNCID_GET_OS_UUID OPTEE_MSG_FUNCID_GET_OS_UUID #define OPTEE_SMC_CALL_GET_OS_UUID \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_UUID) /* * Get revision of Trusted OS. * * Used by non-secure world to figure out which version of the Trusted OS * is installed. Note that the returned revision is the revision of the * Trusted OS, not of the API. * * Returns revision in a0-1 in the same way as OPTEE_SMC_CALLS_REVISION * described above. May optionally return a 32-bit build identifier in a2, * with zero meaning unspecified. */ #define OPTEE_SMC_FUNCID_GET_OS_REVISION OPTEE_MSG_FUNCID_GET_OS_REVISION #define OPTEE_SMC_CALL_GET_OS_REVISION \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_REVISION) struct optee_smc_call_get_os_revision_result { unsigned long major; unsigned long minor; unsigned long build_id; unsigned long reserved1; }; /* * Load Trusted OS from optee/tee.bin in the Linux firmware. * * WARNING: Use this cautiously as it could lead to insecure loading of the * Trusted OS. * This SMC instructs EL3 to load a binary and execute it as the Trusted OS. * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_CALL_LOAD_IMAGE * a1 Upper 32bit of a 64bit size for the payload * a2 Lower 32bit of a 64bit size for the payload * a3 Upper 32bit of the physical address for the payload * a4 Lower 32bit of the physical address for the payload * * The payload is in the OP-TEE image format. * * Returns result in a0, 0 on success and an error code otherwise. */ #define OPTEE_SMC_FUNCID_LOAD_IMAGE 2 #define OPTEE_SMC_CALL_LOAD_IMAGE \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \ ARM_SMCCC_OWNER_TRUSTED_OS_END, \ OPTEE_SMC_FUNCID_LOAD_IMAGE) /* * Call with struct optee_msg_arg as argument * * When called with OPTEE_SMC_CALL_WITH_RPC_ARG or * OPTEE_SMC_CALL_WITH_REGD_ARG in a0 there is one RPC struct optee_msg_arg * following after the first struct optee_msg_arg. The RPC struct * optee_msg_arg has reserved space for the number of RPC parameters as * returned by OPTEE_SMC_EXCHANGE_CAPABILITIES. * * When calling these functions, normal world has a few responsibilities: * 1. It must be able to handle eventual RPCs * 2. Non-secure interrupts should not be masked * 3. If asynchronous notifications has been negotiated successfully, then * the interrupt for asynchronous notifications should be unmasked * during this call. * * Call register usage, OPTEE_SMC_CALL_WITH_ARG and * OPTEE_SMC_CALL_WITH_RPC_ARG: * a0 SMC Function ID, OPTEE_SMC_CALL_WITH_ARG or OPTEE_SMC_CALL_WITH_RPC_ARG * a1 Upper 32 bits of a 64-bit physical pointer to a struct optee_msg_arg * a2 Lower 32 bits of a 64-bit physical pointer to a struct optee_msg_arg * a3 Cache settings, not used if physical pointer is in a predefined shared * memory area else per OPTEE_SMC_SHM_* * a4-6 Not used * a7 Hypervisor Client ID register * * Call register usage, OPTEE_SMC_CALL_WITH_REGD_ARG: * a0 SMC Function ID, OPTEE_SMC_CALL_WITH_REGD_ARG * a1 Upper 32 bits of a 64-bit shared memory cookie * a2 Lower 32 bits of a 64-bit shared memory cookie * a3 Offset of the struct optee_msg_arg in the shared memory with the * supplied cookie * a4-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 Return value, OPTEE_SMC_RETURN_* * a1-3 Not used * a4-7 Preserved * * OPTEE_SMC_RETURN_ETHREAD_LIMIT return register usage: * a0 Return value, OPTEE_SMC_RETURN_ETHREAD_LIMIT * a1-3 Preserved * a4-7 Preserved * * RPC return register usage: * a0 Return value, OPTEE_SMC_RETURN_IS_RPC(val) * a1-2 RPC parameters * a3-7 Resume information, must be preserved * * Possible return values: * OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this * function. * OPTEE_SMC_RETURN_OK Call completed, result updated in * the previously supplied struct * optee_msg_arg. * OPTEE_SMC_RETURN_ETHREAD_LIMIT Number of Trusted OS threads exceeded, * try again later. * OPTEE_SMC_RETURN_EBADADDR Bad physical pointer to struct * optee_msg_arg. * OPTEE_SMC_RETURN_EBADCMD Bad/unknown cmd in struct optee_msg_arg * OPTEE_SMC_RETURN_IS_RPC() Call suspended by RPC call to normal * world. */ #define OPTEE_SMC_FUNCID_CALL_WITH_ARG OPTEE_MSG_FUNCID_CALL_WITH_ARG #define OPTEE_SMC_CALL_WITH_ARG \ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_ARG) #define OPTEE_SMC_CALL_WITH_RPC_ARG \ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_RPC_ARG) #define OPTEE_SMC_CALL_WITH_REGD_ARG \ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_REGD_ARG) /* * Get Shared Memory Config * * Returns the Secure/Non-secure shared memory config. * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_GET_SHM_CONFIG * a1-6 Not used * a7 Hypervisor Client ID register * * Have config return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 Physical address of start of SHM * a2 Size of SHM * a3 Cache settings of memory, as defined by the * OPTEE_SMC_SHM_* values above * a4-7 Preserved * * Not available register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL * a1-3 Not used * a4-7 Preserved */ #define OPTEE_SMC_FUNCID_GET_SHM_CONFIG 7 #define OPTEE_SMC_GET_SHM_CONFIG \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_SHM_CONFIG) struct optee_smc_get_shm_config_result { unsigned long status; unsigned long start; unsigned long size; unsigned long settings; }; /* * Exchanges capabilities between normal world and secure world * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_EXCHANGE_CAPABILITIES * a1 bitfield of normal world capabilities OPTEE_SMC_NSEC_CAP_* * a2-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_* * a2 The maximum secure world notification number * a3 Bit[7:0]: Number of parameters needed for RPC to be supplied * as the second MSG arg struct for * OPTEE_SMC_CALL_WITH_ARG * Bit[31:8]: Reserved (MBZ) * a4-7 Preserved * * Error return register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_* * a2-7 Preserved */ /* Normal world works as a uniprocessor system */ #define OPTEE_SMC_NSEC_CAP_UNIPROCESSOR BIT(0) /* Secure world has reserved shared memory for normal world to use */ #define OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM BIT(0) /* Secure world can communicate via previously unregistered shared memory */ #define OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM BIT(1) /* * Secure world supports commands "register/unregister shared memory", * secure world accepts command buffers located in any parts of non-secure RAM */ #define OPTEE_SMC_SEC_CAP_DYNAMIC_SHM BIT(2) /* Secure world is built with virtualization support */ #define OPTEE_SMC_SEC_CAP_VIRTUALIZATION BIT(3) /* Secure world supports Shared Memory with a NULL reference */ #define OPTEE_SMC_SEC_CAP_MEMREF_NULL BIT(4) /* Secure world supports asynchronous notification of normal world */ #define OPTEE_SMC_SEC_CAP_ASYNC_NOTIF BIT(5) /* Secure world supports pre-allocating RPC arg struct */ #define OPTEE_SMC_SEC_CAP_RPC_ARG BIT(6) /* Secure world supports probing for RPMB device if needed */ #define OPTEE_SMC_SEC_CAP_RPMB_PROBE BIT(7) /* Secure world supports protected memory */ #define OPTEE_SMC_SEC_CAP_PROTMEM BIT(8) /* Secure world supports dynamic protected memory */ #define OPTEE_SMC_SEC_CAP_DYNAMIC_PROTMEM BIT(9) #define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9 #define OPTEE_SMC_EXCHANGE_CAPABILITIES \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES) struct optee_smc_exchange_capabilities_result { unsigned long status; unsigned long capabilities; unsigned long max_notif_value; unsigned long data; }; /* * Disable and empties cache of shared memory objects * * Secure world can cache frequently used shared memory objects, for * example objects used as RPC arguments. When secure world is idle this * function returns one shared memory reference to free. To disable the * cache and free all cached objects this function has to be called until * it returns OPTEE_SMC_RETURN_ENOTAVAIL. * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_DISABLE_SHM_CACHE * a1-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 Upper 32 bits of a 64-bit Shared memory cookie * a2 Lower 32 bits of a 64-bit Shared memory cookie * a3-7 Preserved * * Cache empty return register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL * a1-7 Preserved * * Not idle return register usage: * a0 OPTEE_SMC_RETURN_EBUSY * a1-7 Preserved */ #define OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE 10 #define OPTEE_SMC_DISABLE_SHM_CACHE \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE) struct optee_smc_disable_shm_cache_result { unsigned long status; unsigned long shm_upper32; unsigned long shm_lower32; unsigned long reserved0; }; /* * Enable cache of shared memory objects * * Secure world can cache frequently used shared memory objects, for * example objects used as RPC arguments. When secure world is idle this * function returns OPTEE_SMC_RETURN_OK and the cache is enabled. If * secure world isn't idle OPTEE_SMC_RETURN_EBUSY is returned. * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_ENABLE_SHM_CACHE * a1-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1-7 Preserved * * Not idle return register usage: * a0 OPTEE_SMC_RETURN_EBUSY * a1-7 Preserved */ #define OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE 11 #define OPTEE_SMC_ENABLE_SHM_CACHE \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE) /* * Query OP-TEE about number of supported threads * * Normal World OS or Hypervisor issues this call to find out how many * threads OP-TEE supports. That is how many standard calls can be issued * in parallel before OP-TEE will return OPTEE_SMC_RETURN_ETHREAD_LIMIT. * * Call requests usage: * a0 SMC Function ID, OPTEE_SMC_GET_THREAD_COUNT * a1-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 Number of threads * a2-7 Preserved * * Error return: * a0 OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Requested call is not implemented * a1-7 Preserved */ #define OPTEE_SMC_FUNCID_GET_THREAD_COUNT 15 #define OPTEE_SMC_GET_THREAD_COUNT \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_THREAD_COUNT) /* * Inform OP-TEE that normal world is able to receive asynchronous * notifications. * * Call requests usage: * a0 SMC Function ID, OPTEE_SMC_ENABLE_ASYNC_NOTIF * a1-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1-7 Preserved * * Not supported return register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL * a1-7 Preserved */ #define OPTEE_SMC_FUNCID_ENABLE_ASYNC_NOTIF 16 #define OPTEE_SMC_ENABLE_ASYNC_NOTIF \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_ASYNC_NOTIF) /* * Retrieve a value of notifications pending since the last call of this * function. * * OP-TEE keeps a record of all posted values. When an interrupt is * received which indicates that there are posted values this function * should be called until all pended values have been retrieved. When a * value is retrieved, it's cleared from the record in secure world. * * It is expected that this function is called from an interrupt handler * in normal world. * * Call requests usage: * a0 SMC Function ID, OPTEE_SMC_GET_ASYNC_NOTIF_VALUE * a1-6 Not used * a7 Hypervisor Client ID register * * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 value * a2 Bit[0]: OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID if the value in a1 is * valid, else 0 if no values where pending * a2 Bit[1]: OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING if another value is * pending, else 0. * Bit[31:2]: MBZ * a3-7 Preserved * * Not supported return register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL * a1-7 Preserved */ #define OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID BIT(0) #define OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING BIT(1) /* * Notification that OP-TEE expects a yielding call to do some bottom half * work in a driver. */ #define OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF 0 #define OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE 17 #define OPTEE_SMC_GET_ASYNC_NOTIF_VALUE \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE) /* See OPTEE_SMC_CALL_WITH_RPC_ARG above */ #define OPTEE_SMC_FUNCID_CALL_WITH_RPC_ARG 18 /* See OPTEE_SMC_CALL_WITH_REGD_ARG above */ #define OPTEE_SMC_FUNCID_CALL_WITH_REGD_ARG 19 /* * Get protected memory config * * Returns the protected memory config. * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_GET_PROTMEM_CONFIG * a2-6 Not used, must be zero * a7 Hypervisor Client ID register * * Have config return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 Physical address of start of protected memory * a2 Size of protected memory * a3 PA width, max 64 * a4-7 Preserved * * Not available register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL * a1-3 Not used * a4-7 Preserved */ #define OPTEE_SMC_FUNCID_GET_PROTMEM_CONFIG 20 #define OPTEE_SMC_GET_PROTMEM_CONFIG \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_PROTMEM_CONFIG) struct optee_smc_get_protmem_config_result { unsigned long status; unsigned long start; unsigned long size; unsigned long pa_width; }; /* * Resume from RPC (for example after processing a foreign interrupt) * * Call register usage: * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC * a1-3 Value of a1-3 when OPTEE_SMC_CALL_WITH_ARG returned * OPTEE_SMC_RETURN_RPC in a0 * * Return register usage is the same as for OPTEE_SMC_*CALL_WITH_ARG above. * * Possible return values * OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this * function. * OPTEE_SMC_RETURN_OK Original call completed, result * updated in the previously supplied. * struct optee_msg_arg * OPTEE_SMC_RETURN_RPC Call suspended by RPC call to normal * world. * OPTEE_SMC_RETURN_ERESUME Resume failed, the opaque resume * information was corrupt. */ #define OPTEE_SMC_FUNCID_RETURN_FROM_RPC 3 #define OPTEE_SMC_CALL_RETURN_FROM_RPC \ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_RETURN_FROM_RPC) #define OPTEE_SMC_RETURN_RPC_PREFIX_MASK 0xFFFF0000 #define OPTEE_SMC_RETURN_RPC_PREFIX 0xFFFF0000 #define OPTEE_SMC_RETURN_RPC_FUNC_MASK 0x0000FFFF #define OPTEE_SMC_RETURN_GET_RPC_FUNC(ret) \ ((ret) & OPTEE_SMC_RETURN_RPC_FUNC_MASK) #define OPTEE_SMC_RPC_VAL(func) ((func) | OPTEE_SMC_RETURN_RPC_PREFIX) /* * Allocate memory for RPC parameter passing. The memory is used to hold a * struct optee_msg_arg. * * "Call" register usage: * a0 This value, OPTEE_SMC_RETURN_RPC_ALLOC * a1 Size in bytes of required argument memory * a2 Not used * a3 Resume information, must be preserved * a4-5 Not used * a6-7 Resume information, must be preserved * * "Return" register usage: * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC. * a1 Upper 32 bits of 64-bit physical pointer to allocated * memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't * be allocated. * a2 Lower 32 bits of 64-bit physical pointer to allocated * memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't * be allocated * a3 Preserved * a4 Upper 32 bits of 64-bit Shared memory cookie used when freeing * the memory or doing an RPC * a5 Lower 32 bits of 64-bit Shared memory cookie used when freeing * the memory or doing an RPC * a6-7 Preserved */ #define OPTEE_SMC_RPC_FUNC_ALLOC 0 #define OPTEE_SMC_RETURN_RPC_ALLOC \ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_ALLOC) /* * Free memory previously allocated by OPTEE_SMC_RETURN_RPC_ALLOC * * "Call" register usage: * a0 This value, OPTEE_SMC_RETURN_RPC_FREE * a1 Upper 32 bits of 64-bit shared memory cookie belonging to this * argument memory * a2 Lower 32 bits of 64-bit shared memory cookie belonging to this * argument memory * a3-7 Resume information, must be preserved * * "Return" register usage: * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC. * a1-2 Not used * a3-7 Preserved */ #define OPTEE_SMC_RPC_FUNC_FREE 2 #define OPTEE_SMC_RETURN_RPC_FREE \ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FREE) /* * Deliver a foreign interrupt in normal world. * * "Call" register usage: * a0 OPTEE_SMC_RETURN_RPC_FOREIGN_INTR * a1-7 Resume information, must be preserved * * "Return" register usage: * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC. * a1-7 Preserved */ #define OPTEE_SMC_RPC_FUNC_FOREIGN_INTR 4 #define OPTEE_SMC_RETURN_RPC_FOREIGN_INTR \ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FOREIGN_INTR) /* * Do an RPC request. The supplied struct optee_msg_arg tells which * request to do and the parameters for the request. The following fields * are used (the rest are unused): * - cmd the Request ID * - ret return value of the request, filled in by normal world * - num_params number of parameters for the request * - params the parameters * - param_attrs attributes of the parameters * * "Call" register usage: * a0 OPTEE_SMC_RETURN_RPC_CMD * a1 Upper 32 bits of a 64-bit Shared memory cookie holding a * struct optee_msg_arg, must be preserved, only the data should * be updated * a2 Lower 32 bits of a 64-bit Shared memory cookie holding a * struct optee_msg_arg, must be preserved, only the data should * be updated * a3-7 Resume information, must be preserved * * "Return" register usage: * a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC. * a1-2 Not used * a3-7 Preserved */ #define OPTEE_SMC_RPC_FUNC_CMD 5 #define OPTEE_SMC_RETURN_RPC_CMD \ OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_CMD) /* Returned in a0 */ #define OPTEE_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF /* Returned in a0 only from Trusted OS functions */ #define OPTEE_SMC_RETURN_OK 0x0 #define OPTEE_SMC_RETURN_ETHREAD_LIMIT 0x1 #define OPTEE_SMC_RETURN_EBUSY 0x2 #define OPTEE_SMC_RETURN_ERESUME 0x3 #define OPTEE_SMC_RETURN_EBADADDR 0x4 #define OPTEE_SMC_RETURN_EBADCMD 0x5 #define OPTEE_SMC_RETURN_ENOMEM 0x6 #define OPTEE_SMC_RETURN_ENOTAVAIL 0x7 #define OPTEE_SMC_RETURN_IS_RPC(ret) __optee_smc_return_is_rpc((ret)) static inline bool __optee_smc_return_is_rpc(u32 ret) { return ret != OPTEE_SMC_RETURN_UNKNOWN_FUNCTION && (ret & OPTEE_SMC_RETURN_RPC_PREFIX_MASK) == OPTEE_SMC_RETURN_RPC_PREFIX; } #endif /* OPTEE_SMC_H */
