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77c2775323
This patch introduces the RMM dispatcher into BL31. This will be the mechanism that will enable communication to take place between the Realm and non-secure world. Currently gives the capability for granules to be transitioned from non-secure type to realm and vice versa. Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com> Signed-off-by: Subhasish Ghosh <subhasish.ghosh@arm.com> Change-Id: I1fdc99a4bdd42bc14911aa0c6954b131de309511
64 lines
2 KiB
C
64 lines
2 KiB
C
/*
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* Copyright (c) 2021, Arm Limited. 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 RMI_SVC_H
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#define RMI_SVC_H
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#include <lib/smccc.h>
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#include <lib/utils_def.h>
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/* RMI error codes. */
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#define RMI_SUCCESS 0
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#define RMI_ERROR_NOT_SUPPORTED -1
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#define RMI_ERROR_INVALID_ADDRESS -2
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#define RMI_ERROR_INVALID_PAS -3
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/* The macros below are used to identify RMI calls from the SMC function ID */
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#define RMI_FNUM_MIN_VALUE U(0x00)
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#define RMI_FNUM_MAX_VALUE U(0x20)
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#define is_rmi_fid(fid) __extension__ ({ \
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__typeof__(fid) _fid = (fid); \
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((GET_SMC_NUM(_fid) >= RMI_FNUM_MIN_VALUE) && \
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(GET_SMC_NUM(_fid) <= RMI_FNUM_MAX_VALUE) && \
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(GET_SMC_TYPE(_fid) == SMC_TYPE_FAST) && \
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(GET_SMC_CC(_fid) == SMC_64) && \
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(GET_SMC_OEN(_fid) == OEN_ARM_START) && \
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((_fid & 0x00FE0000) == 0U)); })
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/* Get RMI fastcall std FID from function number */
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#define RMI_FID(smc_cc, func_num) \
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((SMC_TYPE_FAST << FUNCID_TYPE_SHIFT) | \
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((smc_cc) << FUNCID_CC_SHIFT) | \
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(OEN_ARM_START << FUNCID_OEN_SHIFT) | \
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((func_num) << FUNCID_NUM_SHIFT))
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/*
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* SMC_RMM_INIT_COMPLETE is the only function in the RMI that originates from
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* the Realm world and is handled by the RMMD. The remaining functions are
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* always invoked by the Normal world, forwarded by RMMD and handled by the
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* RMM
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*/
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#define RMI_FNUM_REQ_COMPLETE U(0x10)
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#define RMI_FNUM_VERSION_REQ U(0x00)
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#define RMI_FNUM_GRAN_NS_REALM U(0x01)
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#define RMI_FNUM_GRAN_REALM_NS U(0x10)
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/* RMI SMC64 FIDs handled by the RMMD */
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#define RMI_RMM_REQ_COMPLETE RMI_FID(SMC_64, RMI_FNUM_REQ_COMPLETE)
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#define RMI_RMM_REQ_VERSION RMI_FID(SMC_64, RMI_FNUM_VERSION_REQ)
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#define RMI_RMM_GRANULE_DELEGATE RMI_FID(SMC_64, RMI_FNUM_GRAN_NS_REALM)
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#define RMI_RMM_GRANULE_UNDELEGATE RMI_FID(SMC_64, RMI_FNUM_GRAN_REALM_NS)
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#define RMI_ABI_VERSION_GET_MAJOR(_version) ((_version) >> 16)
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#define RMI_ABI_VERSION_GET_MINOR(_version) ((_version) & 0xFFFF)
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/* Reserve a special value for MBZ parameters. */
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#define RMI_PARAM_MBZ U(0x0)
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#endif /* RMI_SVC_H */
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