81 lines
2.9 KiB
C
81 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Ruslan Bukin <br@bsdpad.com>
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*
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* This work was supported by Innovate UK project 105694, "Digital Security
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* by Design (DSbD) Technology Platform Prototype".
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ARM64_SCMI_SCMI_H_
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#define _ARM64_SCMI_SCMI_H_
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#define SCMI_LOCK(sc) mtx_lock(&(sc)->mtx)
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#define SCMI_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
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#define SCMI_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED)
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#define dprintf(fmt, ...)
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/* Shared Memory Transfer. */
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struct scmi_smt_header {
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uint32_t reserved;
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uint32_t channel_status;
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#define SCMI_SHMEM_CHAN_STAT_CHANNEL_ERROR (1 << 1)
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#define SCMI_SHMEM_CHAN_STAT_CHANNEL_FREE (1 << 0)
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uint32_t reserved1[2];
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uint32_t flags;
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#define SCMI_SHMEM_FLAG_INTR_ENABLED (1 << 0)
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uint32_t length;
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uint32_t msg_header;
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uint8_t msg_payload[0];
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};
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#define SMT_HEADER_SIZE sizeof(struct scmi_smt_header)
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#define SMT_HEADER_TOKEN_S 18
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#define SMT_HEADER_TOKEN_M (0x3fff << SMT_HEADER_TOKEN_S)
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#define SMT_HEADER_PROTOCOL_ID_S 10
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#define SMT_HEADER_PROTOCOL_ID_M (0xff << SMT_HEADER_PROTOCOL_ID_S)
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#define SMT_HEADER_MESSAGE_TYPE_S 8
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#define SMT_HEADER_MESSAGE_TYPE_M (0x3 << SMT_HEADER_MESSAGE_TYPE_S)
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#define SMT_HEADER_MESSAGE_ID_S 0
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#define SMT_HEADER_MESSAGE_ID_M (0xff << SMT_HEADER_MESSAGE_ID_S)
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struct scmi_req {
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int protocol_id;
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int message_id;
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const void *in_buf;
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uint32_t in_size;
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void *out_buf;
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uint32_t out_size;
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};
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int scmi_request(device_t dev, struct scmi_req *req);
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void scmi_shmem_read(device_t dev, bus_size_t offset, void *buf,
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bus_size_t len);
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void scmi_shmem_write(device_t dev, bus_size_t offset, const void *buf,
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bus_size_t len);
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#endif /* !_ARM64_SCMI_SCMI_H_ */
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