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09d40e0e08
Enforce full include path for includes. Deprecate old paths.
The following folders inside include/lib have been left unchanged:
- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}
The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).
For example, this patch had to be created because two headers were
called the same way: e0ea0928d5 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3a2 ("drivers: add tzc380 support").
This problem was introduced in commit 4ecca33988 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.
Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.
Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
105 lines
3.5 KiB
C
105 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 <lib/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 <lib/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 <lib/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 <stdint.h>
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#include <lib/cassert.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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