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c3cf06f1a3
All identifiers, regardless of use, that start with two underscores are reserved. This means they can't be used in header guards. The style that this project is now to use the full name of the file in capital letters followed by 'H'. For example, for a file called "uart_example.h", the header guard is UART_EXAMPLE_H. The exceptions are files that are imported from other projects: - CryptoCell driver - dt-bindings folders - zlib headers Change-Id: I50561bf6c88b491ec440d0c8385c74650f3c106e Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/*
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* Copyright (c) 2016-2018, 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 SMCCC_H
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#define SMCCC_H
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#include <utils_def.h>
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#define SMCCC_VERSION_MAJOR_SHIFT U(16)
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#define SMCCC_VERSION_MAJOR_MASK U(0x7FFF)
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#define SMCCC_VERSION_MINOR_SHIFT U(0)
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#define SMCCC_VERSION_MINOR_MASK U(0xFFFF)
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#define MAKE_SMCCC_VERSION(_major, _minor) \
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((((uint32_t)(_major) & SMCCC_VERSION_MAJOR_MASK) << \
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SMCCC_VERSION_MAJOR_SHIFT) \
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| (((uint32_t)(_minor) & SMCCC_VERSION_MINOR_MASK) << \
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SMCCC_VERSION_MINOR_SHIFT))
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#if SMCCC_MAJOR_VERSION == 1
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# define SMCCC_MINOR_VERSION U(1)
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# include <smccc_v1.h>
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#elif SMCCC_MAJOR_VERSION == 2
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# define SMCCC_MINOR_VERSION U(0)
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# include <smccc_v2.h>
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#else
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# error "Unsupported version of SMCCC."
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#endif
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/* Various flags passed to SMC handlers */
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#define SMC_FROM_SECURE (U(0) << 0)
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#define SMC_FROM_NON_SECURE (U(1) << 0)
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#ifndef __ASSEMBLY__
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#include <cassert.h>
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#include <stdint.h>
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#define is_caller_non_secure(_f) (((_f) & SMC_FROM_NON_SECURE) != U(0))
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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) (GET_SMC_OEN(_fid) == OEN_STD_START)
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/* The macro below is used to identify a Arm Architectural Service SMC call */
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#define is_arm_arch_svc_call(_fid) (GET_SMC_OEN(_fid) == OEN_ARM_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) & U(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_UUID2(_name, _tl, _tm, _th, _cl, _ch, \
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_n0, _n1, _n2, _n3, _n4, _n5) \
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CASSERT((uint32_t)(_tl) != (uint32_t) SMC_UNK, invalid_svc_uuid);\
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static const uuid_t _name = { \
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{(_tl >> 24) & 0xFF, \
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(_tl >> 16) & 0xFF, \
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(_tl >> 8) & 0xFF, \
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(_tl & 0xFF)}, \
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{(_tm >> 8) & 0xFF, \
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(_tm & 0xFF)}, \
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{(_th >> 8) & 0xFF, \
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(_th & 0xFF)}, \
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_cl, _ch, \
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{ _n0, _n1, _n2, _n3, _n4, _n5 } \
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}
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/*
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* Return a UUID in the SMC return registers.
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*
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* Acccording to section 5.3 of the SMCCC, UUIDs are returned as a single
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* 128-bit value using the SMC32 calling convention. This value is mapped to
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* argument registers x0-x3 on AArch64 (resp. r0-r3 on AArch32). x0 for example
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* shall hold bytes 0 to 3, with byte 0 in the low-order bits.
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*/
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static inline uint32_t smc_uuid_word(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3)
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{
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return ((uint32_t) b0) | (((uint32_t) b1) << 8) |
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(((uint32_t) b2) << 16) | (((uint32_t) b3) << 24);
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}
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#define SMC_UUID_RET(_h, _uuid) \
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SMC_RET4(handle, \
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smc_uuid_word((_uuid).time_low[0], (_uuid).time_low[1], \
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(_uuid).time_low[2], (_uuid).time_low[3]), \
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smc_uuid_word((_uuid).time_mid[0], (_uuid).time_mid[1], \
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(_uuid).time_hi_and_version[0], \
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(_uuid).time_hi_and_version[1]), \
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smc_uuid_word((_uuid).clock_seq_hi_and_reserved, \
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(_uuid).clock_seq_low, (_uuid).node[0], \
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(_uuid).node[1]), \
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smc_uuid_word((_uuid).node[2], (_uuid).node[3], \
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(_uuid).node[4], (_uuid).node[5]))
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#endif /*__ASSEMBLY__*/
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#endif /* SMCCC_H */
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