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The Raspberry Pi hardware doesn't support a proper software-initiated shutdown, so this instead uses the watchdog to reboot to a special partition which the firmware interprets as an immediate halt on shutdown. When running under Qemu, this causes the emulator to exit.
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Format.h>
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#include <Kernel/Arch/Processor.h>
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#if ARCH(X86_64)
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# include <Kernel/Arch/x86_64/Shutdown.h>
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#elif ARCH(AARCH64)
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# include <Kernel/Arch/aarch64/RPi/Watchdog.h>
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#endif
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#include <Kernel/CommandLine.h>
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#include <Kernel/KSyms.h>
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#include <Kernel/Panic.h>
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#include <Kernel/Thread.h>
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namespace Kernel {
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[[noreturn]] static void __shutdown()
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{
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#if ARCH(X86_64)
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qemu_shutdown();
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virtualbox_shutdown();
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#elif ARCH(AARCH64)
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RPi::Watchdog::the().system_shutdown();
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#endif
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// Note: If we failed to invoke platform shutdown, we need to halt afterwards
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// to ensure no further execution on any CPU still happens.
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Processor::halt();
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}
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void __panic(char const* file, unsigned int line, char const* function)
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{
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// Avoid lock ranking checks on crashing paths, just try to get some debugging messages out.
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auto* thread = Thread::current();
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if (thread)
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thread->set_crashing();
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critical_dmesgln("at {}:{} in {}", file, line, function);
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dump_backtrace(PrintToScreen::Yes);
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if (!CommandLine::was_initialized())
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Processor::halt();
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switch (kernel_command_line().panic_mode()) {
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case PanicMode::Shutdown:
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__shutdown();
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case PanicMode::Halt:
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[[fallthrough]];
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default:
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Processor::halt();
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}
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}
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}
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