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https://github.com/ARM-software/arm-trusted-firmware.git
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82cb2c1ad9
To make software license auditing simpler, use SPDX[0] license identifiers instead of duplicating the license text in every file. NOTE: Files that have been imported by FreeBSD have not been modified. [0]: https://spdx.org/ Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
97 lines
3 KiB
C
97 lines
3 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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* SPDX-License-Identifier: BSD-3-Clause
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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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