122 lines
4.4 KiB
C
122 lines
4.4 KiB
C
/*
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* Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __SMCC_H__
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#define __SMCC_H__
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#include <utils_def.h>
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/*******************************************************************************
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* Bit definitions inside the function id as per the SMC calling convention
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******************************************************************************/
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#define FUNCID_TYPE_SHIFT 31
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#define FUNCID_CC_SHIFT 30
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#define FUNCID_OEN_SHIFT 24
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#define FUNCID_NUM_SHIFT 0
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#define FUNCID_TYPE_MASK 0x1
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#define FUNCID_CC_MASK 0x1
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#define FUNCID_OEN_MASK 0x3f
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#define FUNCID_NUM_MASK 0xffff
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#define FUNCID_TYPE_WIDTH 1
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#define FUNCID_CC_WIDTH 1
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#define FUNCID_OEN_WIDTH 6
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#define FUNCID_NUM_WIDTH 16
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#define GET_SMC_CC(id) ((id >> FUNCID_CC_SHIFT) & \
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FUNCID_CC_MASK)
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#define GET_SMC_TYPE(id) ((id >> FUNCID_TYPE_SHIFT) & \
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FUNCID_TYPE_MASK)
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#define SMC_64 1
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#define SMC_32 0
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#define SMC_OK 0
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#define SMC_UNK 0xffffffff
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#define SMC_TYPE_FAST ULL(1)
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#define SMC_TYPE_STD 0
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#define SMC_PREEMPTED 0xfffffffe
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/*******************************************************************************
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* Owning entity number definitions inside the function id as per the SMC
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* calling convention
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******************************************************************************/
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#define OEN_ARM_START 0
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#define OEN_ARM_END 0
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#define OEN_CPU_START 1
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#define OEN_CPU_END 1
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#define OEN_SIP_START 2
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#define OEN_SIP_END 2
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#define OEN_OEM_START 3
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#define OEN_OEM_END 3
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#define OEN_STD_START 4 /* Standard Calls */
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#define OEN_STD_END 4
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#define OEN_TAP_START 48 /* Trusted Applications */
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#define OEN_TAP_END 49
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#define OEN_TOS_START 50 /* Trusted OS */
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#define OEN_TOS_END 63
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#define OEN_LIMIT 64
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#ifndef __ASSEMBLY__
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#include <cassert.h>
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#include <stdint.h>
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/* Various flags passed to SMC handlers */
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#define SMC_FROM_SECURE (0 << 0)
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#define SMC_FROM_NON_SECURE (1 << 0)
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#define is_caller_non_secure(_f) (!!(_f & SMC_FROM_NON_SECURE))
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#define is_caller_secure(_f) (!(is_caller_non_secure(_f)))
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/* The macro below is used to identify a Standard Service SMC call */
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#define is_std_svc_call(_fid) ((((_fid) >> FUNCID_OEN_SHIFT) & \
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FUNCID_OEN_MASK) == OEN_STD_START)
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/* The macro below is used to identify a valid Fast SMC call */
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#define is_valid_fast_smc(_fid) ((!(((_fid) >> 16) & 0xff)) && \
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(GET_SMC_TYPE(_fid) == SMC_TYPE_FAST))
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/*
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* Macro to define UUID for services. Apart from defining and initializing a
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* uuid_t structure, this macro verifies that the first word of the defined UUID
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* does not equal SMC_UNK. This is to ensure that the caller won't mistake the
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* returned UUID in x0 for an invalid SMC error return
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*/
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#define DEFINE_SVC_UUID(_name, _tl, _tm, _th, _cl, _ch, \
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_n0, _n1, _n2, _n3, _n4, _n5) \
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CASSERT(_tl != SMC_UNK, invalid_svc_uuid);\
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static const uuid_t _name = { \
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_tl, _tm, _th, _cl, _ch, \
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{ _n0, _n1, _n2, _n3, _n4, _n5 } \
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}
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#endif /*__ASSEMBLY__*/
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#endif /* __SMCC_H__ */
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