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76a21174d2
By default the Arm Ethos-N NPU will boot up in secure mode. In this mode the non-secure world cannot access the registers needed to use the NPU. To still allow the non-secure world to use the NPU, a SiP service has been added that can delegate non-secure access to the registers needed to use it. Only the HW_CONFIG for the Arm Juno platform has been updated to include the device tree for the NPU and the platform currently only loads the HW_CONFIG in AArch64 builds. Signed-off-by: Mikael Olsson <mikael.olsson@arm.com> Change-Id: I65dfd864042ed43faae0a259dcf319cbadb5f3d2
62 lines
1.9 KiB
C
62 lines
1.9 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 ETHOSN_H
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#define ETHOSN_H
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#include <lib/smccc.h>
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/* Function numbers */
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#define ETHOSN_FNUM_VERSION U(0x50)
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#define ETHOSN_FNUM_IS_SEC U(0x51)
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#define ETHOSN_FNUM_HARD_RESET U(0x52)
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#define ETHOSN_FNUM_SOFT_RESET U(0x53)
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/* 0x54-0x5F reserved for future use */
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/* SMC64 function IDs */
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#define ETHOSN_FID_64(func_num) U(0xC2000000 | func_num)
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#define ETHOSN_FID_VERSION_64 ETHOSN_FID_64(ETHOSN_FNUM_VERSION)
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#define ETHOSN_FID_IS_SEC_64 ETHOSN_FID_64(ETHOSN_FNUM_IS_SEC)
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#define ETHOSN_FID_HARD_RESET_64 ETHOSN_FID_64(ETHOSN_FNUM_HARD_RESET)
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#define ETHOSN_FID_SOFT_RESET_64 ETHOSN_FID_64(ETHOSN_FNUM_SOFT_RESET)
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/* SMC32 function IDs */
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#define ETHOSN_FID_32(func_num) U(0x82000000 | func_num)
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#define ETHOSN_FID_VERSION_32 ETHOSN_FID_32(ETHOSN_FNUM_VERSION)
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#define ETHOSN_FID_IS_SEC_32 ETHOSN_FID_32(ETHOSN_FNUM_IS_SEC)
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#define ETHOSN_FID_HARD_RESET_32 ETHOSN_FID_32(ETHOSN_FNUM_HARD_RESET)
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#define ETHOSN_FID_SOFT_RESET_32 ETHOSN_FID_32(ETHOSN_FNUM_SOFT_RESET)
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#define ETHOSN_NUM_SMC_CALLS 8
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/* Macro to identify function calls */
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#define ETHOSN_FID_MASK U(0xFFF0)
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#define ETHOSN_FID_VALUE U(0x50)
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#define is_ethosn_fid(_fid) (((_fid) & ETHOSN_FID_MASK) == ETHOSN_FID_VALUE)
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/* Service version */
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#define ETHOSN_VERSION_MAJOR U(0)
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#define ETHOSN_VERSION_MINOR U(1)
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/* Return codes for function calls */
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#define ETHOSN_SUCCESS 0
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#define ETHOSN_NOT_SUPPORTED -1
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/* -2 Reserved for NOT_REQUIRED */
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/* -3 Reserved for INVALID_PARAMETER */
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#define ETHOSN_FAILURE -4
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#define ETHOSN_CORE_IDX_OUT_OF_RANGE -5
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uintptr_t ethosn_smc_handler(uint32_t smc_fid,
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u_register_t core_idx,
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u_register_t x2,
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u_register_t x3,
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u_register_t x4,
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void *cookie,
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void *handle,
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u_register_t flags);
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#endif /* ETHOSN_H */
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