/*
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* (C) Copyright 2017 Rockchip Electronics Co., Ltd
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef TEESMC_H
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#define TEESMC_H
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#include <optee_include/tee_base_types.h>
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#ifndef ASM
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/*
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* This section depends on uint64_t, uint32_t uint8_t already being
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* defined. Since this file is used in several different environments
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* (secure world OS and normal world Linux kernel to start with) where
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* stdint.h may not be available it's the responsibility of the one
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* including this file to provide those types.
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*/
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/*
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* Trusted OS SMC interface.
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*
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* The SMC interface follows SMC Calling Convention
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* (ARM_DEN0028A_SMC_Calling_Convention).
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*
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* The primary objective of this API is to provide a transport layer on
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* which a Global Platform compliant TEE interfaces can be deployed. But the
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* interface can also be used for other implementations.
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*
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* This file is divided in two parts.
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* Part 1 deals with passing parameters to Trusted Applications running in
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* a trusted OS in secure world.
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* Part 2 deals with the lower level handling of the SMC.
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*/
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/*
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*******************************************************************************
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* Part 1 - passing parameters to Trusted Applications
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*******************************************************************************
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*/
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/*
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* Same values as TEE_PARAM_* from TEE Internal API
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*/
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#define TEESMC_ATTR_TYPE_NONE 0
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#define TEESMC_ATTR_TYPE_VALUE_INPUT 1
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#define TEESMC_ATTR_TYPE_VALUE_OUTPUT 2
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#define TEESMC_ATTR_TYPE_VALUE_INOUT 3
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#define TEESMC_ATTR_TYPE_MEMREF_INPUT 5
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#define TEESMC_ATTR_TYPE_MEMREF_OUTPUT 6
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#define TEESMC_ATTR_TYPE_MEMREF_INOUT 7
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#define TEESMC_ATTR_TYPE_MASK 0x7
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/*
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* Meta parameter to be absorbed by the Secure OS and not passed
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* to the Trusted Application.
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*
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* One example of this is a struct teesmc_meta_open_session which
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* is added to TEESMC{32,64}_CMD_OPEN_SESSION.
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*/
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#define TEESMC_ATTR_META 0x8
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/*
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* Used as an indication from normal world of compatible cache usage.
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* 'I' stands for inner cache and 'O' for outer cache.
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*/
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#define TEESMC_ATTR_CACHE_I_NONCACHE 0x0
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#define TEESMC_ATTR_CACHE_I_WRITE_THR 0x1
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#define TEESMC_ATTR_CACHE_I_WRITE_BACK 0x2
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#define TEESMC_ATTR_CACHE_O_NONCACHE 0x0
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#define TEESMC_ATTR_CACHE_O_WRITE_THR 0x4
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#define TEESMC_ATTR_CACHE_O_WRITE_BACK 0x8
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#define TEESMC_ATTR_CACHE_NONCACHE 0x0
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#define TEESMC_ATTR_CACHE_DEFAULT (TEESMC_ATTR_CACHE_I_WRITE_BACK | \
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TEESMC_ATTR_CACHE_O_WRITE_BACK)
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#define TEESMC_ATTR_CACHE_SHIFT 4
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#define TEESMC_ATTR_CACHE_MASK 0xf
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#define TEESMC_CMD_OPEN_SESSION 0
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#define TEESMC_CMD_INVOKE_COMMAND 1
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#define TEESMC_CMD_CLOSE_SESSION 2
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#define TEESMC_CMD_CANCEL 3
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/**
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* struct teesmc32_param_memref - memory reference
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* @buf_ptr: Address of the buffer
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* @size: Size of the buffer
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*
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* Secure and normal world communicates pointer via physical address instead of
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* the virtual address with is usually used for pointers. This is because
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* Secure and normal world has completely independant memory mapping. Normal
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* world can even have a hypervisor which need to translate the guest
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* physical address (AKA IPA in ARM lingo) to a real physical address
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* before passing the structure to secure world.
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*/
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struct teesmc32_param_memref {
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uint32_t buf_ptr;
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uint32_t size;
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};
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/**
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* struct teesmc32_param_memref - memory reference
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* @buf_ptr: Address of the buffer
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* @size: Size of the buffer
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*
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* See description of struct teesmc32_param_memref.
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*/
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struct teesmc64_param_memref {
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uint64_t buf_ptr;
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uint64_t size;
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};
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/**
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* struct teesmc32_param_value - values
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* @a: first value
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* @b: second value
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*/
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struct teesmc32_param_value {
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uint32_t a;
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uint32_t b;
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};
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/**
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* struct teesmc64_param_value - values
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* @a: first value
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* @b: second value
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*/
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struct teesmc64_param_value {
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uint64_t a;
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uint64_t b;
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};
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/**
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* struct teesmc32_param - parameter
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* @attr: attributes
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* @memref: a memory reference
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* @value: a value
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*
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* attr & TEESMC_ATTR_TYPE_MASK indicates if memref or value is used in the
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* union. TEESMC_ATTR_TYPE_VALUE_* indicates value and
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* TEESMC_ATTR_TYPE_MEMREF_* indicates memref. TEESMC_ATTR_TYPE_NONE
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* indicates that none of the members are used.
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*/
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struct teesmc32_param {
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uint32_t attr;
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union {
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struct teesmc32_param_memref memref;
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struct teesmc32_param_value value;
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} u;
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};
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/**
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* struct teesmc64_param - parameter
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* @attr: attributes
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* @memref: a memory reference
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* @value: a value
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*
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* See description of union teesmc32_param.
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*/
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struct teesmc64_param {
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uint64_t attr;
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union {
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struct teesmc64_param_memref memref;
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struct teesmc64_param_value value;
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} u;
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};
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/**
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* struct teesmc32_arg - SMC argument for Trusted OS
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* @cmd: Command, one of TEESMC_CMD_*
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* @ta_func: Trusted Application function, specific to the Trusted Application,
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* used if cmd == TEESMC_CMD_INVOKE_COMMAND
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* @session: In parameter for all TEESMC_CMD_* except
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* TEESMC_CMD_OPEN_SESSION where it's an output paramter instead
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* @ret: return value
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* @ret_origin: origin of the return value
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* @num_params: number of parameters supplied to the OS Command
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* @params: the parameters supplied to the OS Command
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*
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* All normal SMC calls to Trusted OS uses this struct. If cmd requires
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* further information than what these field holds it can be passed as a
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* parameter tagged as meta (setting the TEESMC_ATTR_META bit in
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* corresponding param_attrs). This is used for TEESMC_CMD_OPEN_SESSION
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* to pass a struct teesmc32_meta_open_session which is needed find the
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* Trusted Application and to indicate the credentials of the client.
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*/
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struct teesmc32_arg {
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uint32_t cmd;
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uint32_t ta_func;
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uint32_t session;
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uint32_t ret;
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uint32_t ret_origin;
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uint32_t num_params;
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/*
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* Commented out element used to visualize the layout dynamic part
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* of the struct. Note that this field is not available at all
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* if num_params == 0.
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*
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* params is accessed through the macro TEESMC32_GET_PARAMS
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*
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* struct teesmc32_param params[num_params];
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*/
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};
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/**
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* struct teesmc64_arg - SMC argument for Trusted OS
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* @cmd: OS Command, one of TEESMC_CMD_*
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* @ta_func: Trusted Application function, specific to the Trusted Application
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* @session: In parameter for all TEESMC_CMD_* but
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* TEESMC_CMD_OPEN_SESSION
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* @ret: return value
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* @ret_origin: origin of the return value
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* @num_params: number of parameters supplied to the OS Command
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* @params: the parameters supplied to the OS Command
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*
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* See description of struct teesmc32_arg.
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*/
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struct teesmc64_arg {
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uint64_t cmd;
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uint64_t ta_func;
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uint64_t session;
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uint64_t ret;
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uint64_t ret_origin;
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uint64_t num_params;
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/*
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* Commented out element used to visualize the layout dynamic part
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* of the struct. Note that this field is not available at all
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* if num_params == 0.
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*
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* params is accessed through the macro TEESMC64_GET_PARAMS
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*
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* struct teesmc64_param params[num_params];
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*/
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};
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/**
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* TEESMC64_GET_PARAMS - return pointer to union teesmc64_param *
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*
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* @x: Pointer to a struct teesmc64_arg
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*
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* Returns a pointer to the params[] inside a struct teesmc64_arg.
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*/
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#define TEESMC64_GET_PARAMS(x) \
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(struct teesmc64_param *)(((struct teesmc64_arg *)(x)) + 1)
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/**
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* TEESMC64_GET_ARG_SIZE - return size of struct teesmc64_arg
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*
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* @num_params: Number of parameters embedded in the struct teesmc64_arg
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*
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* Returns the size of the struct teesmc64_arg together with the number
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* of embedded paramters.
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*/
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#define TEESMC64_GET_ARG_SIZE(num_params) \
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(sizeof(struct teesmc64_arg) + \
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sizeof(struct teesmc64_param) * (num_params))
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#define TEESMC_UUID_LEN 16
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/**
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* struct teesmc_meta_open_session - additional parameters for
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* TEESMC32_CMD_OPEN_SESSION and
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* TEESMC64_CMD_OPEN_SESSION
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* @uuid: UUID of the Trusted Application
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* @clnt_uuid: UUID of client
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* @clnt_login: Login class of client, TEE_LOGIN_* if being Global Platform
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* compliant
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*
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* This struct is passed in the first parameter as an input memref tagged
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* as meta on an TEESMC{32,64}_CMD_OPEN_SESSION cmd. It's important
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* that it really is the first parameter to make it easy for an eventual
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* hypervisor to inspect and possibly update clnt_* values.
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*/
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struct teesmc_meta_open_session {
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uint8_t uuid[TEESMC_UUID_LEN];
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uint8_t clnt_uuid[TEESMC_UUID_LEN];
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uint32_t clnt_login;
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};
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#endif /*!ASM*/
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/*
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*******************************************************************************
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* Part 2 - low level SMC interaction
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*******************************************************************************
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*/
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#define TEESMC_32 0
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#define TEESMC_64 0x40000000
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#define TEESMC_FAST_CALL 0x80000000
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#define TEESMC_STD_CALL 0
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#define TEESMC_OWNER_MASK 0x3F
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#define TEESMC_OWNER_SHIFT 24
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#define TEESMC_FUNC_MASK 0xFFFF
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#define TEESMC_IS_FAST_CALL(smc_val) ((smc_val) & TEESMC_FAST_CALL)
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#define TEESMC_IS_64(smc_val) ((smc_val) & TEESMC_64)
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#define TEESMC_FUNC_NUM(smc_val) ((smc_val) & TEESMC_FUNC_MASK)
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#define TEESMC_OWNER_NUM(smc_val) (((smc_val) >> TEESMC_OWNER_SHIFT) & \
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TEESMC_OWNER_MASK)
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#define TEESMC_CALL_VAL(type, calling_convention, owner, func_num) \
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((type) | (calling_convention) | \
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(((owner) & TEESMC_OWNER_MASK) << TEESMC_OWNER_SHIFT) |\
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((func_num) & TEESMC_FUNC_MASK))
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#define TEESMC_OWNER_ARCH 0
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#define TEESMC_OWNER_CPU 1
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#define TEESMC_OWNER_SIP 2
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#define TEESMC_OWNER_OEM 3
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#define TEESMC_OWNER_STANDARD 4
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#define TEESMC_OWNER_TRUSTED_APP 48
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#define TEESMC_OWNER_TRUSTED_OS 50
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#define TEESMC_OWNER_TRUSTED_OS_OPTEED 62
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#define TEESMC_OWNER_TRUSTED_OS_API 63
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/*
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* Function specified by SMC Calling convention.
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*/
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#define TEESMC32_FUNCID_CALLS_COUNT 0xFF00
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#define TEESMC32_CALLS_COUNT \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_FAST_CALL, \
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TEESMC_OWNER_TRUSTED_OS_API, \
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TEESMC32_FUNCID_CALLS_COUNT)
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/*
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* Function specified by SMC Calling convention
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*
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* Return one of the following UIDs if using API specified in this file
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* without further extentions:
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* 65cb6b93-af0c-4617-8ed6-644a8d1140f8 : Only 32 bit calls are supported
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* 65cb6b93-af0c-4617-8ed6-644a8d1140f9 : Both 32 and 64 bit calls are supported
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*/
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#define TEESMC_UID_R0 0x65cb6b93
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#define TEESMC_UID_R1 0xaf0c4617
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#define TEESMC_UID_R2 0x8ed6644a
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#define TEESMC_UID32_R3 0x8d1140f8
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#define TEESMC_UID64_R3 0x8d1140f9
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#define TEESMC32_FUNCID_CALLS_UID 0xFF01
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#define TEESMC32_CALLS_UID \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_FAST_CALL, \
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TEESMC_OWNER_TRUSTED_OS_API, \
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TEESMC32_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 1.0 if using API specified in this file without further extentions.
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*/
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#define TEESMC_REVISION_MAJOR 1
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#define TEESMC_REVISION_MINOR 0
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#define TEESMC32_FUNCID_CALLS_REVISION 0xFF03
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#define TEESMC32_CALLS_REVISION \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_FAST_CALL, \
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TEESMC_OWNER_TRUSTED_OS_API, \
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TEESMC32_FUNCID_CALLS_REVISION)
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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 r0-4/w0-4 in the same way as TEESMC32_CALLS_UID
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* described above.
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*/
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#define TEESMC_FUNCID_GET_OS_UUID 0
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#define TEESMC32_CALL_GET_OS_UUID \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_FAST_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_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 r0-1/w0-1 in the same way as TEESMC32_CALLS_REVISION
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* described above.
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*/
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#define TEESMC_FUNCID_GET_OS_REVISION 1
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#define TEESMC32_CALL_GET_OS_REVISION \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_FAST_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_GET_OS_REVISION)
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/*
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* Call with struct teesmc32_arg as argument
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*
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* Call register usage:
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* r0/x0 SMC Function ID, TEESMC32_CALL_WITH_ARG
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* r1/x1 Physical pointer to a struct teesmc32_arg
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* r2-6/x2-6 Not used
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* r7/x7 Hypervisor Client ID register
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*
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* Normal return register usage:
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* r0/x0 Return value, TEESMC_RETURN_*
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* r1-3/x1-3 Not used
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* r4-7/x4-7 Preserved
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*
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* Ebusy return register usage:
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* r0/x0 Return value, TEESMC_RETURN_EBUSY
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* r1-3/x1-3 Preserved
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* r4-7/x4-7 Preserved
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*
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* RPC return register usage:
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* r0/x0 Return value, TEESMC_RETURN_IS_RPC(val)
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* r1-2/x1-2 RPC parameters
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* r3-7/x3-7 Resume information, must be preserved
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*
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* Possible return values:
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* TEESMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
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* function.
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* TEESMC_RETURN_OK Call completed, result updated in
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* the previously supplied struct
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* teesmc32_arg.
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* TEESMC_RETURN_EBUSY Trusted OS busy, try again later.
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* TEESMC_RETURN_EBADADDR Bad physcial pointer to struct
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* teesmc32_arg.
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* TEESMC_RETURN_EBADCMD Bad/unknown cmd in struct teesmc32_arg
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* TEESMC_RETURN_IS_RPC() Call suspended by RPC call to normal
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* world.
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*/
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#define TEESMC_FUNCID_CALL_WITH_ARG 2
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#define TEESMC32_CALL_WITH_ARG \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_STD_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_CALL_WITH_ARG)
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/* Same as TEESMC32_CALL_WITH_ARG but a "fast call". */
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#define TEESMC32_FASTCALL_WITH_ARG \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_FAST_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_CALL_WITH_ARG)
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/*
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* Call with struct teesmc64_arg as argument
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*
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* See description of TEESMC32_CALL_WITH_ARG above, uses struct
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* teesmc64_arg in x1 instead.
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*/
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#define TEESMC64_CALL_WITH_ARG \
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TEESMC_CALL_VAL(TEESMC_64, TEESMC_STD_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_CALL_WITH_ARG)
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/* Same as TEESMC64_CALL_WITH_ARG but a "fast call". */
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#define TEESMC64_FASTCALL_WITH_ARG \
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TEESMC_CALL_VAL(TEESMC_64, TEESMC_FAST_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_CALL_WITH_ARG)
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/*
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* Resume from RPC (for example after processing an IRQ)
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*
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* Call register usage:
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* r0/x0 SMC Function ID,
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* TEESMC32_CALL_RETURN_FROM_RPC or
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* TEESMC32_FASTCALL_RETURN_FROM_RPC
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* r1-3/x1-3 Value of r1-3/x1-3 when TEESMC32_CALL_WITH_ARG returned
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* TEESMC_RETURN_RPC in r0/x0
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*
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* Return register usage is the same as for TEESMC32_CALL_WITH_ARG above.
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*
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* Possible return values
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* TEESMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
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* function.
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* TEESMC_RETURN_OK Original call completed, result
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* updated in the previously supplied.
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* struct teesmc32_arg
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* TEESMC_RETURN_RPC Call suspended by RPC call to normal
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* world.
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* TEESMC_RETURN_EBUSY Trusted OS busy, try again later.
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* TEESMC_RETURN_ERESUME Resume failed, the opaque resume
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* information was corrupt.
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*/
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#define TEESMC_FUNCID_RETURN_FROM_RPC 3
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#define TEESMC32_CALL_RETURN_FROM_RPC \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_STD_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_RETURN_FROM_RPC)
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/* Same as TEESMC32_CALL_RETURN_FROM_RPC but a "fast call". */
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#define TEESMC32_FASTCALL_RETURN_FROM_RPC \
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TEESMC_CALL_VAL(TEESMC_32, TEESMC_STD_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_RETURN_FROM_RPC)
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/*
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* Resume from RPC (for example after processing an IRQ)
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*
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* See description of TEESMC32_CALL_RETURN_FROM_RPC above, used when
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* it's a 64bit call that has returned.
|
*/
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#define TEESMC64_CALL_RETURN_FROM_RPC \
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TEESMC_CALL_VAL(TEESMC_64, TEESMC_STD_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_RETURN_FROM_RPC)
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/* Same as TEESMC64_CALL_RETURN_FROM_RPC but a "fast call". */
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#define TEESMC64_FASTCALL_RETURN_FROM_RPC \
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TEESMC_CALL_VAL(TEESMC_64, TEESMC_STD_CALL, TEESMC_OWNER_TRUSTED_OS, \
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TEESMC_FUNCID_RETURN_FROM_RPC)
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#define TEESMC_RETURN_RPC_PREFIX_MASK 0xFFFF0000
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#define TEESMC_RETURN_RPC_PREFIX 0xFFFF0000
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#define TEESMC_RETURN_RPC_FUNC_MASK 0x0000FFFF
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#define TEESMC_RETURN_GET_RPC_FUNC(ret) ((ret) & TEESMC_RETURN_RPC_FUNC_MASK)
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#define TEESMC_RPC_VAL(func) ((func) | TEESMC_RETURN_RPC_PREFIX)
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/*
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* Allocate argument memory for RPC parameter passing.
|
* Argument memory is used to hold a struct teesmc32_arg.
|
*
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* "Call" register usage:
|
* r0/x0 This value, TEESMC_RETURN_RPC_ALLOC
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* r1/x1 Size in bytes of required argument memory
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* r2-7/x2-7 Resume information, must be preserved
|
*
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* "Return" register usage:
|
* r0/x0 SMC Function ID, TEESMC32_CALL_RETURN_FROM_RPC if it was an
|
* AArch32 SMC return or TEESMC64_CALL_RETURN_FROM_RPC for
|
* AArch64 SMC return
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* r1/x1 Physical pointer to allocated argument memory, 0 if size
|
* was 0 or if memory can't be allocated
|
* r2-7/x2-7 Preserved
|
*/
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#define TEESMC_RPC_FUNC_ALLOC_ARG 0
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#define TEESMC_RETURN_RPC_ALLOC_ARG \
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TEESMC_RPC_VAL(TEESMC_RPC_FUNC_ALLOC_ARG)
|
|
/*
|
* Allocate payload memory for RPC parameter passing.
|
* Payload memory is used to hold the memory referred to by struct
|
* teesmc32_param_memref.
|
*
|
* "Call" register usage:
|
* r0/x0 This value, TEESMC_RETURN_RPC_ALLOC
|
* r1/x1 Size in bytes of required payload memory
|
* r2-7/x2-7 Resume information, must be preserved
|
*
|
* "Return" register usage:
|
* r0/x0 SMC Function ID, TEESMC32_CALL_RETURN_FROM_RPC if it was an
|
* AArch32 SMC return or TEESMC64_CALL_RETURN_FROM_RPC for
|
* AArch64 SMC return
|
* r1/x1 Physical pointer to allocated payload memory, 0 if size
|
* was 0 or if memory can't be allocated
|
* r2-7/x2-7 Preserved
|
*/
|
#define TEESMC_RPC_FUNC_ALLOC_PAYLOAD 1
|
#define TEESMC_RETURN_RPC_ALLOC_PAYLOAD \
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TEESMC_RPC_VAL(TEESMC_RPC_FUNC_ALLOC_PAYLOAD)
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/*
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* Free memory previously allocated by TEESMC_RETURN_RPC_ALLOC_ARG.
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*
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* "Call" register usage:
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* r0/x0 This value, TEESMC_RETURN_RPC_FREE
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* r1/x1 Physical pointer to previously allocated argument memory
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* r2-7/x2-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* r0/x0 SMC Function ID, TEESMC32_CALL_RETURN_FROM_RPC if it was an
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* AArch32 SMC return or TEESMC64_CALL_RETURN_FROM_RPC for
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* AArch64 SMC return
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* r1/x1 Not used
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* r2-7/x2-7 Preserved
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*/
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#define TEESMC_RPC_FUNC_FREE_ARG 2
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#define TEESMC_RETURN_RPC_FREE_ARG TEESMC_RPC_VAL(TEESMC_RPC_FUNC_FREE_ARG)
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/*
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* Free memory previously allocated by TEESMC_RETURN_RPC_ALLOC_PAYLOAD.
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*
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* "Call" register usage:
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* r0/x0 This value, TEESMC_RETURN_RPC_FREE
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* r1/x1 Physical pointer to previously allocated payload memory
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* r3-7/x3-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* r0/x0 SMC Function ID, TEESMC32_CALL_RETURN_FROM_RPC if it was an
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* AArch32 SMC return or TEESMC64_CALL_RETURN_FROM_RPC for
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* AArch64 SMC return
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* r1-2/x1-2 Not used
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* r3-7/x3-7 Preserved
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*/
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#define TEESMC_RPC_FUNC_FREE_PAYLOAD 3
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#define TEESMC_RETURN_RPC_FREE_PAYLOAD \
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TEESMC_RPC_VAL(TEESMC_RPC_FUNC_FREE_PAYLOAD)
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/*
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* Deliver an IRQ in normal world.
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*
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* "Call" register usage:
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* r0/x0 TEESMC_RETURN_RPC_IRQ
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* r1-7/x1-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* r0/x0 SMC Function ID, TEESMC32_CALL_RETURN_FROM_RPC if it was an
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* AArch32 SMC return or TEESMC64_CALL_RETURN_FROM_RPC for
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* AArch64 SMC return
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* r1-7/x1-7 Preserved
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*/
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#define TEESMC_RPC_FUNC_IRQ 4
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#define TEESMC_RETURN_RPC_IRQ TEESMC_RPC_VAL(TEESMC_RPC_FUNC_IRQ)
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/*
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* Do an RPC request. The supplied struct teesmc{32,64}_arg tells which
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* request to do and the paramters 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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* r0/x0 TEESMC_RETURN_RPC_CMD
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* r1/x1 Physical pointer to a struct teesmc32_arg if returning from
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* a AArch32 SMC or a struct teesmc64_arg if returning from a
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* AArch64 SMC, must be preserved, only the data should
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* be updated
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* r2-7/x2-7 Resume information, must be preserved
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*
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* "Return" register usage:
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* r0/x0 SMC Function ID, TEESMC32_CALL_RETURN_FROM_RPC if it was an
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* AArch32 SMC return or TEESMC64_CALL_RETURN_FROM_RPC for
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* AArch64 SMC return
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* r1-7/x1-7 Preserved
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*/
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#define TEESMC_RPC_FUNC_CMD 5
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#define TEESMC_RETURN_RPC_CMD TEESMC_RPC_VAL(TEESMC_RPC_FUNC_CMD)
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/* Returned in r0 */
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#define TEESMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF
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/* Returned in r0 only from Trusted OS functions */
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#define TEESMC_RETURN_OK 0x0
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#define TEESMC_RETURN_EBUSY 0x1
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#define TEESMC_RETURN_ERESUME 0x2
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#define TEESMC_RETURN_EBADADDR 0x3
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#define TEESMC_RETURN_EBADCMD 0x4
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#define TEESMC_RETURN_IS_RPC(ret) \
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(((ret) & TEESMC_RETURN_RPC_PREFIX_MASK) == TEESMC_RETURN_RPC_PREFIX)
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typedef struct teesmc_meta_open_session t_teesmc_meta_open_session;
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void tee_smc_call(ARM_SMC_ARGS *param);
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#endif /* TEESMC_H */
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