154 lines
5.0 KiB
C
154 lines
5.0 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
/*
|
|
* Copyright (c) 2019-2021, Linaro Limited
|
|
*/
|
|
|
|
/*
|
|
* This file is exported by OP-TEE and is kept in sync between secure world
|
|
* and normal world drivers. We're using ARM FF-A 1.0 specification.
|
|
*/
|
|
|
|
#ifndef __OPTEE_FFA_H
|
|
#define __OPTEE_FFA_H
|
|
|
|
#include <linux/arm_ffa.h>
|
|
|
|
/*
|
|
* Normal world sends requests with FFA_MSG_SEND_DIRECT_REQ and
|
|
* responses are returned with FFA_MSG_SEND_DIRECT_RESP for normal
|
|
* messages.
|
|
*
|
|
* All requests with FFA_MSG_SEND_DIRECT_REQ and FFA_MSG_SEND_DIRECT_RESP
|
|
* are using the AArch32 SMC calling convention with register usage as
|
|
* defined in FF-A specification:
|
|
* w0: Function ID (0x8400006F or 0x84000070)
|
|
* w1: Source/Destination IDs
|
|
* w2: Reserved (MBZ)
|
|
* w3-w7: Implementation defined, free to be used below
|
|
*/
|
|
|
|
#define OPTEE_FFA_VERSION_MAJOR 1
|
|
#define OPTEE_FFA_VERSION_MINOR 0
|
|
|
|
#define OPTEE_FFA_BLOCKING_CALL(id) (id)
|
|
#define OPTEE_FFA_YIELDING_CALL_BIT 31
|
|
#define OPTEE_FFA_YIELDING_CALL(id) ((id) | BIT(OPTEE_FFA_YIELDING_CALL_BIT))
|
|
|
|
/*
|
|
* Returns the API version implemented, currently follows the FF-A version.
|
|
* Call register usage:
|
|
* w3: Service ID, OPTEE_FFA_GET_API_VERSION
|
|
* w4-w7: Not used (MBZ)
|
|
*
|
|
* Return register usage:
|
|
* w3: OPTEE_FFA_VERSION_MAJOR
|
|
* w4: OPTEE_FFA_VERSION_MINOR
|
|
* w5-w7: Not used (MBZ)
|
|
*/
|
|
#define OPTEE_FFA_GET_API_VERSION OPTEE_FFA_BLOCKING_CALL(0)
|
|
|
|
/*
|
|
* Returns the revision of OP-TEE.
|
|
*
|
|
* 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.
|
|
*
|
|
* Call register usage:
|
|
* w3: Service ID, OPTEE_FFA_GET_OS_VERSION
|
|
* w4-w7: Unused (MBZ)
|
|
*
|
|
* Return register usage:
|
|
* w3: CFG_OPTEE_REVISION_MAJOR
|
|
* w4: CFG_OPTEE_REVISION_MINOR
|
|
* w5: TEE_IMPL_GIT_SHA1 (or zero if not supported)
|
|
*/
|
|
#define OPTEE_FFA_GET_OS_VERSION OPTEE_FFA_BLOCKING_CALL(1)
|
|
|
|
/*
|
|
* Exchange capabilities between normal world and secure world.
|
|
*
|
|
* Currently there are no defined capabilities. When features are added new
|
|
* capabilities may be added.
|
|
*
|
|
* Call register usage:
|
|
* w3: Service ID, OPTEE_FFA_EXCHANGE_CAPABILITIES
|
|
* w4-w7: Note used (MBZ)
|
|
*
|
|
* Return register usage:
|
|
* w3: Error code, 0 on success
|
|
* w4: Bit[7:0]: Number of parameters needed for RPC to be supplied
|
|
* as the second MSG arg struct for
|
|
* OPTEE_FFA_YIELDING_CALL_WITH_ARG.
|
|
* Bit[31:8]: Reserved (MBZ)
|
|
* w5-w7: Note used (MBZ)
|
|
*/
|
|
#define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2)
|
|
|
|
/*
|
|
* Unregister shared memory
|
|
*
|
|
* Call register usage:
|
|
* w3: Service ID, OPTEE_FFA_YIELDING_CALL_UNREGISTER_SHM
|
|
* w4: Shared memory handle, lower bits
|
|
* w5: Shared memory handle, higher bits
|
|
* w6-w7: Not used (MBZ)
|
|
*
|
|
* Return register usage:
|
|
* w3: Error code, 0 on success
|
|
* w4-w7: Note used (MBZ)
|
|
*/
|
|
#define OPTEE_FFA_UNREGISTER_SHM OPTEE_FFA_BLOCKING_CALL(3)
|
|
|
|
/*
|
|
* Call with struct optee_msg_arg as argument in the supplied shared memory
|
|
* with a zero internal offset and normal cached memory attributes.
|
|
* Register usage:
|
|
* w3: Service ID, OPTEE_FFA_YIELDING_CALL_WITH_ARG
|
|
* w4: Lower 32 bits of a 64-bit Shared memory handle
|
|
* w5: Upper 32 bits of a 64-bit Shared memory handle
|
|
* w6: Offset into shared memory pointing to a struct optee_msg_arg
|
|
* right after the parameters of this struct (at offset
|
|
* OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg
|
|
* for RPC, this struct has reserved space for the number of RPC
|
|
* parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES.
|
|
* w7: Not used (MBZ)
|
|
* Resume from RPC. Register usage:
|
|
* w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME
|
|
* w4-w6: Not used (MBZ)
|
|
* w7: Resume info
|
|
*
|
|
* Normal return (yielding call is completed). Register usage:
|
|
* w3: Error code, 0 on success
|
|
* w4: OPTEE_FFA_YIELDING_CALL_RETURN_DONE
|
|
* w5-w7: Not used (MBZ)
|
|
*
|
|
* RPC interrupt return (RPC from secure world). Register usage:
|
|
* w3: Error code == 0
|
|
* w4: Any defined RPC code but OPTEE_FFA_YIELDING_CALL_RETURN_DONE
|
|
* w5-w6: Not used (MBZ)
|
|
* w7: Resume info
|
|
*
|
|
* Possible error codes in register w3:
|
|
* 0: Success
|
|
* FFA_DENIED: w4 isn't one of OPTEE_FFA_YIELDING_CALL_START
|
|
* OPTEE_FFA_YIELDING_CALL_RESUME
|
|
*
|
|
* Possible error codes for OPTEE_FFA_YIELDING_CALL_START,
|
|
* FFA_BUSY: Number of OP-TEE OS threads exceeded,
|
|
* try again later
|
|
* FFA_DENIED: RPC shared memory object not found
|
|
* FFA_INVALID_PARAMETER: Bad shared memory handle or offset into the memory
|
|
*
|
|
* Possible error codes for OPTEE_FFA_YIELDING_CALL_RESUME
|
|
* FFA_INVALID_PARAMETER: Bad resume info
|
|
*/
|
|
#define OPTEE_FFA_YIELDING_CALL_WITH_ARG OPTEE_FFA_YIELDING_CALL(0)
|
|
#define OPTEE_FFA_YIELDING_CALL_RESUME OPTEE_FFA_YIELDING_CALL(1)
|
|
|
|
#define OPTEE_FFA_YIELDING_CALL_RETURN_DONE 0
|
|
#define OPTEE_FFA_YIELDING_CALL_RETURN_RPC_CMD 1
|
|
#define OPTEE_FFA_YIELDING_CALL_RETURN_INTERRUPT 2
|
|
|
|
#endif /*__OPTEE_FFA_H*/
|