mirror of
https://github.com/RGBCube/serenity
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9252a892bb
We move QEMU and VirtualBox shutdown sequences to a separate file, as well as moving the i8042 reboot code sequence too to another file. This allows us to abstract specific methods from the power state node code of the SysFS filesystem, to allow other architectures to put their methods there too in the future.
111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Platform.h>
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#if ARCH(I386) || ARCH(X86_64)
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# include <Kernel/Arch/x86/common/I8042Reboot.h>
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# include <Kernel/Arch/x86/common/Shutdown.h>
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#endif
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/PowerStateSwitch.h>
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#include <Kernel/Firmware/ACPI/Parser.h>
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#include <Kernel/Process.h>
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#include <Kernel/Sections.h>
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#include <Kernel/TTY/ConsoleManagement.h>
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namespace Kernel {
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mode_t PowerStateSwitchNode::permissions() const
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{
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return S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
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}
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UNMAP_AFTER_INIT NonnullLockRefPtr<PowerStateSwitchNode> PowerStateSwitchNode::must_create(FirmwareSysFSDirectory& firmware_directory)
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{
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return adopt_lock_ref_if_nonnull(new (nothrow) PowerStateSwitchNode(firmware_directory)).release_nonnull();
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}
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UNMAP_AFTER_INIT PowerStateSwitchNode::PowerStateSwitchNode(FirmwareSysFSDirectory&)
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: SysFSComponent()
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{
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}
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ErrorOr<void> PowerStateSwitchNode::truncate(u64 size)
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{
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// Note: This node doesn't store any useful data anyway, so we can safely
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// truncate this to zero (essentially ignoring the request without failing).
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if (size != 0)
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return EPERM;
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return {};
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}
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ErrorOr<size_t> PowerStateSwitchNode::write_bytes(off_t offset, size_t count, UserOrKernelBuffer const& data, OpenFileDescription*)
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{
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if (Checked<off_t>::addition_would_overflow(offset, count))
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return EOVERFLOW;
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if (offset > 0)
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return EINVAL;
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if (count > 1)
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return EINVAL;
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char buf[1];
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TRY(data.read(buf, 1));
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switch (buf[0]) {
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case '0':
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return EINVAL;
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case '1':
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reboot();
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VERIFY_NOT_REACHED();
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case '2':
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poweroff();
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VERIFY_NOT_REACHED();
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default:
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return EINVAL;
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}
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VERIFY_NOT_REACHED();
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}
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void PowerStateSwitchNode::reboot()
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{
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MutexLocker locker(Process::current().big_lock());
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dbgln("acquiring FS locks...");
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FileSystem::lock_all();
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dbgln("syncing mounted filesystems...");
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FileSystem::sync();
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dbgln("attempting reboot via ACPI");
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if (ACPI::is_enabled())
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ACPI::Parser::the()->try_acpi_reboot();
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#if ARCH(I386) || ARCH(X86_64)
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i8042_reboot();
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#endif
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dbgln("reboot attempts failed, applications will stop responding.");
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dmesgln("Reboot can't be completed. It's safe to turn off the computer!");
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Processor::halt();
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}
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void PowerStateSwitchNode::poweroff()
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{
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MutexLocker locker(Process::current().big_lock());
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ConsoleManagement::the().switch_to_debug();
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dbgln("acquiring FS locks...");
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FileSystem::lock_all();
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dbgln("syncing mounted filesystems...");
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FileSystem::sync();
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dbgln("attempting system shutdown...");
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#if ARCH(I386) || ARCH(X86_64)
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qemu_shutdown();
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virtualbox_shutdown();
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#endif
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dbgln("shutdown attempts failed, applications will stop responding.");
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dmesgln("Shutdown can't be completed. It's safe to turn off the computer!");
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Processor::halt();
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}
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}
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