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697e6ccb89
As a demo, query the firmware version. `Meta/serenity.sh gdb aarch64` can be used to observe that qemu puts 0x548E1 in x0 in response to this mailbox message.
23 lines
471 B
C++
23 lines
471 B
C++
/*
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* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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namespace Prekernel {
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// Can exchange mailbox messages with the Raspberry Pi's VideoCore chip.
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// https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface
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class Mailbox {
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public:
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static bool call(u8 channel, u32 volatile* __attribute__((aligned(16))) data);
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static u32 query_firmware_version();
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};
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}
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