diff options
Diffstat (limited to '')
| -rw-r--r-- | include/lib/smccc.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/include/lib/smccc.h b/include/lib/smccc.h new file mode 100644 index 0000000..cce91af --- /dev/null +++ b/include/lib/smccc.h @@ -0,0 +1,226 @@ +/* + * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef SMCCC_H +#define SMCCC_H + +#include <lib/utils_def.h> + +#define SMCCC_VERSION_MAJOR_SHIFT U(16) +#define SMCCC_VERSION_MAJOR_MASK U(0x7FFF) +#define SMCCC_VERSION_MINOR_SHIFT U(0) +#define SMCCC_VERSION_MINOR_MASK U(0xFFFF) +#define MAKE_SMCCC_VERSION(_major, _minor) \ + ((((uint32_t)(_major) & SMCCC_VERSION_MAJOR_MASK) << \ + SMCCC_VERSION_MAJOR_SHIFT) \ + | (((uint32_t)(_minor) & SMCCC_VERSION_MINOR_MASK) << \ + SMCCC_VERSION_MINOR_SHIFT)) + +#define SMCCC_MAJOR_VERSION U(1) +#define SMCCC_MINOR_VERSION U(2) + +/******************************************************************************* + * Bit definitions inside the function id as per the SMC calling convention + ******************************************************************************/ +#define FUNCID_TYPE_SHIFT U(31) +#define FUNCID_TYPE_MASK U(0x1) +#define FUNCID_TYPE_WIDTH U(1) + +#define FUNCID_CC_SHIFT U(30) +#define FUNCID_CC_MASK U(0x1) +#define FUNCID_CC_WIDTH U(1) + +#define FUNCID_OEN_SHIFT U(24) +#define FUNCID_OEN_MASK U(0x3f) +#define FUNCID_OEN_WIDTH U(6) + +#define FUNCID_SVE_HINT_SHIFT U(16) +#define FUNCID_SVE_HINT_MASK U(1) +#define FUNCID_SVE_HINT_WIDTH U(1) + +#define FUNCID_NUM_SHIFT U(0) +#define FUNCID_NUM_MASK U(0xffff) +#define FUNCID_NUM_WIDTH U(16) + +#define FUNCID_MASK U(0xffffffff) + +#define GET_SMC_NUM(id) (((id) >> FUNCID_NUM_SHIFT) & \ + FUNCID_NUM_MASK) +#define GET_SMC_TYPE(id) (((id) >> FUNCID_TYPE_SHIFT) & \ + FUNCID_TYPE_MASK) +#define GET_SMC_CC(id) (((id) >> FUNCID_CC_SHIFT) & \ + FUNCID_CC_MASK) +#define GET_SMC_OEN(id) (((id) >> FUNCID_OEN_SHIFT) & \ + FUNCID_OEN_MASK) + +/******************************************************************************* + * SMCCC_ARCH_SOC_ID SoC version & revision bit definition + ******************************************************************************/ +#define SOC_ID_JEP_106_BANK_IDX_MASK GENMASK_32(30, 24) +#define SOC_ID_JEP_106_BANK_IDX_SHIFT U(24) +#define SOC_ID_JEP_106_ID_CODE_MASK GENMASK_32(23, 16) +#define SOC_ID_JEP_106_ID_CODE_SHIFT U(16) +#define SOC_ID_IMPL_DEF_MASK GENMASK_32(15, 0) +#define SOC_ID_IMPL_DEF_SHIFT U(0) +#define SOC_ID_SET_JEP_106(bkid, mfid) ((((bkid) << SOC_ID_JEP_106_BANK_IDX_SHIFT) & \ + SOC_ID_JEP_106_BANK_IDX_MASK) | \ + (((mfid) << SOC_ID_JEP_106_ID_CODE_SHIFT) & \ + SOC_ID_JEP_106_ID_CODE_MASK)) + +#define SOC_ID_REV_MASK GENMASK_32(30, 0) +#define SOC_ID_REV_SHIFT U(0) + +/******************************************************************************* + * 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_STD_HYP_START U(5) /* Standard Hypervisor Service calls */ +#define OEN_STD_HYP_END U(5) +#define OEN_VEN_HYP_START U(6) /* Vendor Hypervisor Service calls */ +#define OEN_VEN_HYP_END U(6) +#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) + +/* Flags and error codes */ +#define SMC_64 U(1) +#define SMC_32 U(0) + +#define SMC_TYPE_FAST UL(1) +#define SMC_TYPE_YIELD UL(0) + +#define SMC_OK ULL(0) +#define SMC_UNK -1 +#define SMC_PREEMPTED -2 /* Not defined by the SMCCC */ + +/* Return codes for Arm Architecture Service SMC calls */ +#define SMC_ARCH_CALL_SUCCESS 0 +#define SMC_ARCH_CALL_NOT_SUPPORTED -1 +#define SMC_ARCH_CALL_NOT_REQUIRED -2 +#define SMC_ARCH_CALL_INVAL_PARAM -3 + +/* + * Various flags passed to SMC handlers + * + * Bit 5 and bit 0 of the flag are used to + * determine the source security state as + * follows: + * --------------------------------- + * Bit 5 | Bit 0 | Security state + * --------------------------------- + * 0 0 SMC_FROM_SECURE + * 0 1 SMC_FROM_NON_SECURE + * 1 1 SMC_FROM_REALM + * + * Bit 16 of flags records the caller's SMC + * SVE hint bit according to SMCCCv1.3. + * It can be consumed by dispatchers using + * is_sve_hint_set macro. + * + */ + +#define SMC_FROM_SECURE (U(0) << 0) +#define SMC_FROM_NON_SECURE (U(1) << 0) +#define SMC_FROM_REALM U(0x21) +#define SMC_FROM_MASK U(0x21) + +#ifndef __ASSEMBLER__ + +#include <stdint.h> + +#include <lib/cassert.h> + +#if ENABLE_RME +#define is_caller_non_secure(_f) (((_f) & SMC_FROM_MASK) \ + == SMC_FROM_NON_SECURE) +#define is_caller_secure(_f) (((_f) & SMC_FROM_MASK) \ + == SMC_FROM_SECURE) +#define is_caller_realm(_f) (((_f) & SMC_FROM_MASK) \ + == SMC_FROM_REALM) +#define caller_sec_state(_f) ((_f) & SMC_FROM_MASK) +#else /* ENABLE_RME */ +#define is_caller_non_secure(_f) (((_f) & SMC_FROM_NON_SECURE) != U(0)) +#define is_caller_secure(_f) (!is_caller_non_secure(_f)) +#endif /* ENABLE_RME */ + +#define is_sve_hint_set(_f) (((_f) & (FUNCID_SVE_HINT_MASK \ + << FUNCID_SVE_HINT_SHIFT)) != U(0)) + +/* The macro below is used to identify a Standard Service SMC call */ +#define is_std_svc_call(_fid) (GET_SMC_OEN(_fid) == OEN_STD_START) + +/* The macro below is used to identify a Arm Architectural Service SMC call */ +#define is_arm_arch_svc_call(_fid) (GET_SMC_OEN(_fid) == OEN_ARM_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) \ + == (uint32_t)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_UUID2(_name, _tl, _tm, _th, _cl, _ch, \ + _n0, _n1, _n2, _n3, _n4, _n5) \ + CASSERT((uint32_t)(_tl) != (uint32_t)SMC_UNK, \ + invalid_svc_uuid_##_name); \ + static const uuid_t _name = { \ + {((_tl) >> 24) & 0xFF, \ + ((_tl) >> 16) & 0xFF, \ + ((_tl) >> 8) & 0xFF, \ + ((_tl) & 0xFF)}, \ + {((_tm) >> 8) & 0xFF, \ + ((_tm) & 0xFF)}, \ + {((_th) >> 8) & 0xFF, \ + ((_th) & 0xFF)}, \ + (_cl), (_ch), \ + { (_n0), (_n1), (_n2), (_n3), (_n4), (_n5) } \ + } + +/* + * Return a UUID in the SMC return registers. + * + * Acccording to section 5.3 of the SMCCC, UUIDs are returned as a single + * 128-bit value using the SMC32 calling convention. This value is mapped to + * argument registers x0-x3 on AArch64 (resp. r0-r3 on AArch32). x0 for example + * shall hold bytes 0 to 3, with byte 0 in the low-order bits. + */ +static inline uint32_t smc_uuid_word(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3) +{ + return ((uint32_t) b0) | (((uint32_t) b1) << 8) | + (((uint32_t) b2) << 16) | (((uint32_t) b3) << 24); +} + +#define SMC_UUID_RET(_h, _uuid) \ + SMC_RET4(handle, \ + smc_uuid_word((_uuid).time_low[0], (_uuid).time_low[1], \ + (_uuid).time_low[2], (_uuid).time_low[3]), \ + smc_uuid_word((_uuid).time_mid[0], (_uuid).time_mid[1], \ + (_uuid).time_hi_and_version[0], \ + (_uuid).time_hi_and_version[1]), \ + smc_uuid_word((_uuid).clock_seq_hi_and_reserved, \ + (_uuid).clock_seq_low, (_uuid).node[0], \ + (_uuid).node[1]), \ + smc_uuid_word((_uuid).node[2], (_uuid).node[3], \ + (_uuid).node[4], (_uuid).node[5])) + +#endif /*__ASSEMBLER__*/ +#endif /* SMCCC_H */ |