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ladybird/Kernel/init.cpp

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Types.h>
#include <Kernel/ACPI/DynamicParser.h>
#include <Kernel/ACPI/Initialize.h>
#include <Kernel/ACPI/MultiProcessorParser.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/CMOS.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Devices/BXVGADevice.h>
#include <Kernel/Devices/DiskPartition.h>
#include <Kernel/Devices/EBRPartitionTable.h>
#include <Kernel/Devices/FullDevice.h>
#include <Kernel/Devices/GPTPartitionTable.h>
#include <Kernel/Devices/KeyboardDevice.h>
#include <Kernel/Devices/MBRPartitionTable.h>
#include <Kernel/Devices/MBVGADevice.h>
#include <Kernel/Devices/NullDevice.h>
#include <Kernel/Devices/PATAChannel.h>
#include <Kernel/Devices/PATADiskDevice.h>
#include <Kernel/Devices/PS2MouseDevice.h>
#include <Kernel/Devices/RandomDevice.h>
#include <Kernel/Devices/SB16.h>
#include <Kernel/Devices/SerialDevice.h>
#include <Kernel/Devices/VMWareBackdoor.h>
#include <Kernel/Devices/ZeroDevice.h>
#include <Kernel/FileSystem/Ext2FileSystem.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Heap/SlabAllocator.h>
#include <Kernel/Heap/kmalloc.h>
#include <Kernel/Interrupts/APIC.h>
#include <Kernel/Interrupts/InterruptManagement.h>
#include <Kernel/Interrupts/PIC.h>
#include <Kernel/KSyms.h>
#include <Kernel/Multiboot.h>
#include <Kernel/Net/E1000NetworkAdapter.h>
#include <Kernel/Net/LoopbackAdapter.h>
#include <Kernel/Net/NetworkTask.h>
#include <Kernel/Net/RTL8139NetworkAdapter.h>
#include <Kernel/PCI/Access.h>
#include <Kernel/PCI/Initializer.h>
#include <Kernel/Process.h>
#include <Kernel/RTC.h>
#include <Kernel/Random.h>
#include <Kernel/Scheduler.h>
#include <Kernel/TTY/PTYMultiplexer.h>
#include <Kernel/TTY/VirtualConsole.h>
#include <Kernel/Tasks/FinalizerTask.h>
#include <Kernel/Tasks/SyncTask.h>
#include <Kernel/Time/TimeManagement.h>
#include <Kernel/VM/MemoryManager.h>
// Defined in the linker script
typedef void (*ctor_func_t)();
extern ctor_func_t start_ctors;
extern ctor_func_t end_ctors;
extern u32 __stack_chk_guard;
u32 __stack_chk_guard;
namespace Kernel {
[[noreturn]] static void init_stage2();
static void setup_serial_debug();
VirtualConsole* tty0;
// SerenityOS Kernel C++ entry point :^)
//
// This is where C++ execution begins, after boot.S transfers control here.
//
// The purpose of init() is to start multi-tasking. It does the bare minimum
// amount of work needed to start the scheduler.
//
// Once multi-tasking is ready, we spawn a new thread that starts in the
// init_stage2() function. Initialization continues there.
extern "C" [[noreturn]] void init()
{
setup_serial_debug();
cpu_setup(0);
kmalloc_init();
slab_alloc_init();
{
static Processor s_bsp_processor_info; // global but let's keep it "private"
s_bsp_processor_info.initialize(0);
}
CommandLine::initialize(reinterpret_cast<const char*>(low_physical_to_virtual(multiboot_info_ptr->cmdline)));
MemoryManager::initialize(0);
// Invoke all static global constructors in the kernel.
// Note that we want to do this as early as possible.
for (ctor_func_t* ctor = &start_ctors; ctor < &end_ctors; ctor++)
(*ctor)();
APIC::initialize();
InterruptManagement::initialize();
ACPI::initialize();
new VFS;
new KeyboardDevice;
new PS2MouseDevice;
new Console;
klog() << "Starting SerenityOS...";
__stack_chk_guard = get_fast_random<u32>();
TimeManagement::initialize();
new NullDevice;
if (!get_serial_debug())
new SerialDevice(SERIAL_COM1_ADDR, 64);
new SerialDevice(SERIAL_COM2_ADDR, 65);
new SerialDevice(SERIAL_COM3_ADDR, 66);
new SerialDevice(SERIAL_COM4_ADDR, 67);
VirtualConsole::initialize();
tty0 = new VirtualConsole(0);
new VirtualConsole(1);
VirtualConsole::switch_to(0);
Process::initialize();
Scheduler::initialize(0);
Thread* init_stage2_thread = nullptr;
Process::create_kernel_process(init_stage2_thread, "init_stage2", init_stage2);
Scheduler::start();
ASSERT_NOT_REACHED();
}
//
// This is where C++ execution begins for APs, after boot.S transfers control here.
//
// The purpose of init_ap() is to initialize APs for multi-tasking.
//
extern "C" [[noreturn]] void init_ap(u32 cpu, Processor* processor_info)
{
klog() << "CPU #" << cpu << " processor_info at " << VirtualAddress(FlatPtr(processor_info));
cpu_setup(cpu);
processor_info->initialize(cpu);
MemoryManager::initialize(cpu);
APIC::the().enable(cpu);
Scheduler::initialize(cpu);
Scheduler::start();
ASSERT_NOT_REACHED();
}
void init_stage2()
{
SyncTask::spawn();
FinalizerTask::spawn();
PCI::initialize();
bool text_mode = kernel_command_line().lookup("boot_mode").value_or("graphical") == "text";
if (text_mode) {
dbg() << "Text mode enabled";
} else {
bool bxvga_found = false;
PCI::enumerate([&](const PCI::Address&, PCI::ID id) {
if (id.vendor_id == 0x1234 && id.device_id == 0x1111)
bxvga_found = true;
});
if (bxvga_found) {
new BXVGADevice;
} else {
if (multiboot_info_ptr->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_RGB || multiboot_info_ptr->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT) {
new MBVGADevice(
PhysicalAddress((u32)(multiboot_info_ptr->framebuffer_addr)),
multiboot_info_ptr->framebuffer_pitch,
multiboot_info_ptr->framebuffer_width,
multiboot_info_ptr->framebuffer_height);
} else {
new BXVGADevice;
}
}
}
E1000NetworkAdapter::detect();
RTL8139NetworkAdapter::detect();
LoopbackAdapter::the();
Syscall::initialize();
new ZeroDevice;
new FullDevice;
new RandomDevice;
new PTYMultiplexer;
new SB16;
VMWareBackdoor::initialize();
bool force_pio = kernel_command_line().contains("force_pio");
auto root = kernel_command_line().lookup("root").value_or("/dev/hda");
if (!root.starts_with("/dev/hda")) {
klog() << "init_stage2: root filesystem must be on the first IDE hard drive (/dev/hda)";
hang();
}
auto pata0 = PATAChannel::create(PATAChannel::ChannelType::Primary, force_pio);
NonnullRefPtr<BlockDevice> root_dev = *pata0->master_device();
root = root.substring(strlen("/dev/hda"), root.length() - strlen("/dev/hda"));
if (root.length()) {
auto partition_number = root.to_uint();
if (!partition_number.has_value()) {
klog() << "init_stage2: couldn't parse partition number from root kernel parameter";
hang();
}
MBRPartitionTable mbr(root_dev);
if (!mbr.initialize()) {
klog() << "init_stage2: couldn't read MBR from disk";
hang();
}
if (mbr.is_protective_mbr()) {
dbg() << "GPT Partitioned Storage Detected!";
GPTPartitionTable gpt(root_dev);
if (!gpt.initialize()) {
klog() << "init_stage2: couldn't read GPT from disk";
hang();
}
auto partition = gpt.partition(partition_number.value());
if (!partition) {
klog() << "init_stage2: couldn't get partition " << partition_number.value();
hang();
}
root_dev = *partition;
} else {
dbg() << "MBR Partitioned Storage Detected!";
if (mbr.contains_ebr()) {
EBRPartitionTable ebr(root_dev);
if (!ebr.initialize()) {
klog() << "init_stage2: couldn't read EBR from disk";
hang();
}
auto partition = ebr.partition(partition_number.value());
if (!partition) {
klog() << "init_stage2: couldn't get partition " << partition_number.value();
hang();
}
root_dev = *partition;
} else {
if (partition_number.value() < 1 || partition_number.value() > 4) {
klog() << "init_stage2: invalid partition number " << partition_number.value() << "; expected 1 to 4";
hang();
}
auto partition = mbr.partition(partition_number.value());
if (!partition) {
klog() << "init_stage2: couldn't get partition " << partition_number.value();
hang();
}
root_dev = *partition;
}
}
}
auto e2fs = Ext2FS::create(*FileDescription::create(root_dev));
if (!e2fs->initialize()) {
klog() << "init_stage2: couldn't open root filesystem";
hang();
}
if (!VFS::the().mount_root(e2fs)) {
klog() << "VFS::mount_root failed";
hang();
}
Process::current()->set_root_directory(VFS::the().root_custody());
load_kernel_symbol_table();
int error;
// FIXME: It would be nicer to set the mode from userspace.
tty0->set_graphical(!text_mode);
Thread* thread = nullptr;
auto userspace_init = kernel_command_line().lookup("init").value_or("/bin/SystemServer");
Process::create_user_process(thread, userspace_init, (uid_t)0, (gid_t)0, (pid_t)0, error, {}, {}, tty0);
if (error != 0) {
klog() << "init_stage2: error spawning SystemServer: " << error;
hang();
}
thread->set_priority(THREAD_PRIORITY_HIGH);
NetworkTask::spawn();
Process::current()->sys$exit(0);
ASSERT_NOT_REACHED();
}
void setup_serial_debug()
{
// this is only used one time, directly below here. we can't use this part
// of libc at this point in the boot process, or we'd just pull strstr in
// from <string.h>.
auto bad_prefix_check = [](const char* str, const char* search) -> bool {
while (*search)
if (*search++ != *str++)
return false;
return true;
};
// serial_debug will output all the klog() and dbg() data to COM1 at
// 8-N-1 57600 baud. this is particularly useful for debugging the boot
// process on live hardware.
//
// note: it must be the first option in the boot cmdline.
u32 cmdline = low_physical_to_virtual(multiboot_info_ptr->cmdline);
if (cmdline && bad_prefix_check(reinterpret_cast<const char*>(cmdline), "serial_debug"))
set_serial_debug(true);
}
extern "C" {
multiboot_info_t* multiboot_info_ptr;
}
// Define some Itanium C++ ABI methods to stop the linker from complaining
// If we actually call these something has gone horribly wrong
void* __dso_handle __attribute__((visibility("hidden")));
extern "C" int __cxa_atexit(void (*)(void*), void*, void*)
{
ASSERT_NOT_REACHED();
return 0;
}
}
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