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Diffstat (limited to 'include/lib/smcc.h')
| -rw-r--r-- | include/lib/smcc.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/include/lib/smcc.h b/include/lib/smcc.h new file mode 100644 index 00000000..13b1e7ac --- /dev/null +++ b/include/lib/smcc.h @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef __SMCC_H__ +#define __SMCC_H__ + +#include <utils_def.h> + +/******************************************************************************* + * Bit definitions inside the function id as per the SMC calling convention + ******************************************************************************/ +#define FUNCID_TYPE_SHIFT U(31) +#define FUNCID_CC_SHIFT U(30) +#define FUNCID_OEN_SHIFT U(24) +#define FUNCID_NUM_SHIFT U(0) + +#define FUNCID_TYPE_MASK U(0x1) +#define FUNCID_CC_MASK U(0x1) +#define FUNCID_OEN_MASK U(0x3f) +#define FUNCID_NUM_MASK U(0xffff) + +#define FUNCID_TYPE_WIDTH U(1) +#define FUNCID_CC_WIDTH U(1) +#define FUNCID_OEN_WIDTH U(6) +#define FUNCID_NUM_WIDTH U(16) + +#define GET_SMC_CC(id) ((id >> FUNCID_CC_SHIFT) & \ + FUNCID_CC_MASK) +#define GET_SMC_TYPE(id) ((id >> FUNCID_TYPE_SHIFT) & \ + FUNCID_TYPE_MASK) + +#define SMC_64 U(1) +#define SMC_32 U(0) +#define SMC_OK U(0) +#define SMC_UNK U(0xffffffff) +#define SMC_TYPE_FAST ULL(1) +#if !ERROR_DEPRECATED +#define SMC_TYPE_STD ULL(0) +#endif +#define SMC_TYPE_YIELD U(0) +#define SMC_PREEMPTED U(0xfffffffe) +/******************************************************************************* + * Owning entity number definitions inside the function id as per the SMC + * calling convention + ******************************************************************************/ +#define OEN_ARM_START U(0) +#define OEN_ARM_END U(0) +#define OEN_CPU_START U(1) +#define OEN_CPU_END U(1) +#define OEN_SIP_START U(2) +#define OEN_SIP_END U(2) +#define OEN_OEM_START U(3) +#define OEN_OEM_END U(3) +#define OEN_STD_START U(4) /* Standard Service Calls */ +#define OEN_STD_END U(4) +#define OEN_TAP_START U(48) /* Trusted Applications */ +#define OEN_TAP_END U(49) +#define OEN_TOS_START U(50) /* Trusted OS */ +#define OEN_TOS_END U(63) +#define OEN_LIMIT U(64) + +#ifndef __ASSEMBLY__ + +#include <cassert.h> +#include <stdint.h> + +/* Various flags passed to SMC handlers */ +#define SMC_FROM_SECURE (U(0) << 0) +#define SMC_FROM_NON_SECURE (U(1) << 0) + +#define is_caller_non_secure(_f) (!!(_f & SMC_FROM_NON_SECURE)) +#define is_caller_secure(_f) (!(is_caller_non_secure(_f))) + +/* The macro below is used to identify a Standard Service SMC call */ +#define is_std_svc_call(_fid) ((((_fid) >> FUNCID_OEN_SHIFT) & \ + FUNCID_OEN_MASK) == OEN_STD_START) + +/* The macro below is used to identify a valid Fast SMC call */ +#define is_valid_fast_smc(_fid) ((!(((_fid) >> 16) & U(0xff))) && \ + (GET_SMC_TYPE(_fid) == SMC_TYPE_FAST)) + +/* + * Macro to define UUID for services. Apart from defining and initializing a + * uuid_t structure, this macro verifies that the first word of the defined UUID + * does not equal SMC_UNK. This is to ensure that the caller won't mistake the + * returned UUID in x0 for an invalid SMC error return + */ +#define DEFINE_SVC_UUID(_name, _tl, _tm, _th, _cl, _ch, \ + _n0, _n1, _n2, _n3, _n4, _n5) \ + CASSERT(_tl != SMC_UNK, invalid_svc_uuid);\ + static const uuid_t _name = { \ + _tl, _tm, _th, _cl, _ch, \ + { _n0, _n1, _n2, _n3, _n4, _n5 } \ + } + +#endif /*__ASSEMBLY__*/ +#endif /* __SMCC_H__ */ |