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The SCMI specification describes a set of standard interfaces for power, performance and system management. SCMI is extensible and provides interfaces to access functions which are often implemented in firmwares in the System Control Processor (SCP). This implements Shared Memory-based transfer, which is one of the ways on how messages are exchanged between agents and the platform. This includes a driver for ARM Message Handling Unit (MHU) Doorbell, which is a mechanism that the caller can use to alert the callee of the presence of a message. The support implements clock management interface. For instance this allows us to control HDMI pixel clock on ARM Morello Board. Tested on ARM Morello Board. Obtained from: CheriBSD Differential Revision: https://reviews.freebsd.org/D37316 Reviewed by: manu Sponsored by: UKRI
44 lines
1.7 KiB
Objective-C
44 lines
1.7 KiB
Objective-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 by
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# 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 are met:
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# 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 ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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#include <machine/bus.h>
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INTERFACE mmio_sram;
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METHOD uint8_t read_1 {
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device_t dev;
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bus_size_t offset;
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};
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METHOD void write_1 {
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device_t dev;
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bus_size_t offset;
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uint8_t value;
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};
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