ladybird/Kernel/init.cpp
Jesse 59e122f8ba Kernel: Expand PATA driver to support multiple hard drives (#365)
The previous implementation of the PIIX3/4 PATA/IDE channel driver only
supported a single drive, as the object model was wrong (the channel
inherits the IRQ, not the disk drive itself). This fixes it by 'attaching'
two `PATADiskDevices` to a `PATAChannel`, which makes more sense.

The reading/writing code is presented as is, which violates the spec
outlined by Seagate in the linked datasheet. That spec is rather old,
so it might not be 100% up to date, though may cause issues on real
hardware, so until we can actually test it, this will suffice.
2019-07-28 15:44:01 +02:00

235 lines
6.7 KiB
C++

#include "Devices/PATADiskDevice.h"
#include "KSyms.h"
#include "Process.h"
#include "RTC.h"
#include "Scheduler.h"
#include "kmalloc.h"
#include <AK/Types.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Arch/i386/PIC.h>
#include <Kernel/Arch/i386/PIT.h>
#include <Kernel/CMOS.h>
#include <Kernel/Devices/BXVGADevice.h>
#include <Kernel/Devices/DebugLogDevice.h>
#include <Kernel/Devices/DiskPartition.h>
#include <Kernel/Devices/FloppyDiskDevice.h>
#include <Kernel/Devices/FullDevice.h>
#include <Kernel/Devices/KeyboardDevice.h>
#include <Kernel/Devices/MBRPartitionTable.h>
#include <Kernel/Devices/NullDevice.h>
#include <Kernel/Devices/PATAChannel.h>
#include <Kernel/Devices/PS2MouseDevice.h>
#include <Kernel/Devices/RandomDevice.h>
#include <Kernel/Devices/SB16.h>
#include <Kernel/Devices/SerialDevice.h>
#include <Kernel/Devices/ZeroDevice.h>
#include <Kernel/FileSystem/DevPtsFS.h>
#include <Kernel/FileSystem/Ext2FileSystem.h>
#include <Kernel/FileSystem/ProcFS.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/KParams.h>
#include <Kernel/Multiboot.h>
#include <Kernel/Net/E1000NetworkAdapter.h>
#include <Kernel/Net/NetworkTask.h>
#include <Kernel/TTY/PTYMultiplexer.h>
#include <Kernel/TTY/VirtualConsole.h>
#include <Kernel/VM/MemoryManager.h>
VirtualConsole* tty0;
VirtualConsole* tty1;
VirtualConsole* tty2;
VirtualConsole* tty3;
KeyboardDevice* keyboard;
PS2MouseDevice* ps2mouse;
SB16* sb16;
DebugLogDevice* dev_debuglog;
NullDevice* dev_null;
SerialDevice* ttyS0;
SerialDevice* ttyS1;
SerialDevice* ttyS2;
SerialDevice* ttyS3;
VFS* vfs;
[[noreturn]] static void init_stage2()
{
Syscall::initialize();
auto dev_zero = make<ZeroDevice>();
auto dev_full = make<FullDevice>();
auto dev_random = make<RandomDevice>();
auto dev_ptmx = make<PTYMultiplexer>();
auto root = KParams::the().get("root");
if (root.is_empty()) {
root = "/dev/hda";
}
if (!root.starts_with("/dev/hda")) {
kprintf("init_stage2: root filesystem must be on the first IDE hard drive (/dev/hda)\n");
hang();
}
auto pata0 = PATAChannel::create(PATAChannel::ChannelType::Primary);
NonnullRefPtr<DiskDevice> root_dev = *pata0->master_device();
root = root.substring(strlen("/dev/hda"), root.length() - strlen("/dev/hda"));
if (root.length()) {
bool ok;
unsigned partition_number = root.to_uint(ok);
if (!ok) {
kprintf("init_stage2: couldn't parse partition number from root kernel parameter\n");
hang();
}
if (partition_number < 1 || partition_number > 4) {
kprintf("init_stage2: invalid partition number %d; expected 1 to 4\n", partition_number);
hang();
}
MBRPartitionTable mbr(root_dev);
if (!mbr.initialize()) {
kprintf("init_stage2: couldn't read MBR from disk\n");
hang();
}
auto partition = mbr.partition(partition_number);
if (!partition) {
kprintf("init_stage2: couldn't get partition %d\n", partition_number);
hang();
}
root_dev = *partition;
}
auto e2fs = Ext2FS::create(root_dev);
if (!e2fs->initialize()) {
kprintf("init_stage2: couldn't open root filesystem\n");
hang();
}
vfs->mount_root(e2fs);
dbgprintf("Load ksyms\n");
load_ksyms();
dbgprintf("Loaded ksyms\n");
vfs->mount(ProcFS::the(), "/proc");
vfs->mount(DevPtsFS::the(), "/dev/pts");
// Now, detect whether or not there are actually any floppy disks attached to the system
u8 detect = CMOS::read(0x10);
RefPtr<FloppyDiskDevice> fd0;
RefPtr<FloppyDiskDevice> fd1;
if ((detect >> 4) & 0x4) {
fd0 = FloppyDiskDevice::create(FloppyDiskDevice::DriveType::Master);
kprintf("fd0 is 1.44MB floppy drive\n");
} else {
kprintf("fd0 type unsupported! Type == 0x%x\n", detect >> 4);
}
if (detect & 0x0f) {
fd0 = FloppyDiskDevice::create(FloppyDiskDevice::DriveType::Slave);
kprintf("fd1 is 1.44MB floppy drive");
} else {
kprintf("fd1 type unsupported! Type == 0x%x\n", detect & 0x0f);
}
int error;
auto* system_server_process = Process::create_user_process("/bin/SystemServer", (uid_t)100, (gid_t)100, (pid_t)0, error, {}, {}, tty0);
if (error != 0) {
dbgprintf("init_stage2: error spawning SystemServer: %d\n", error);
hang();
}
system_server_process->set_priority(Process::HighPriority);
current->process().sys$exit(0);
ASSERT_NOT_REACHED();
}
extern "C" {
multiboot_info_t* multiboot_info_ptr;
}
extern "C" [[noreturn]] void init()
{
sse_init();
kmalloc_init();
init_ksyms();
// must come after kmalloc_init because we use AK_MAKE_ETERNAL in KParams
new KParams(String(reinterpret_cast<const char*>(multiboot_info_ptr->cmdline)));
vfs = new VFS;
dev_debuglog = new DebugLogDevice;
auto console = make<Console>();
RTC::initialize();
PIC::initialize();
gdt_init();
idt_init();
keyboard = new KeyboardDevice;
ps2mouse = new PS2MouseDevice;
sb16 = new SB16;
dev_null = new NullDevice;
ttyS0 = new SerialDevice(SERIAL_COM1_ADDR, 64);
ttyS1 = new SerialDevice(SERIAL_COM2_ADDR, 65);
ttyS2 = new SerialDevice(SERIAL_COM3_ADDR, 66);
ttyS3 = new SerialDevice(SERIAL_COM4_ADDR, 67);
VirtualConsole::initialize();
tty0 = new VirtualConsole(0, VirtualConsole::AdoptCurrentVGABuffer);
tty1 = new VirtualConsole(1);
tty2 = new VirtualConsole(2);
tty3 = new VirtualConsole(3);
VirtualConsole::switch_to(0);
kprintf("Starting Serenity Operating System...\n");
MemoryManager::initialize();
PIT::initialize();
new BXVGADevice;
auto e1000 = E1000NetworkAdapter::autodetect();
NonnullRefPtr<ProcFS> new_procfs = ProcFS::create();
new_procfs->initialize();
auto devptsfs = DevPtsFS::create();
devptsfs->initialize();
Process::initialize();
Thread::initialize();
Process::create_kernel_process("init_stage2", init_stage2);
Process::create_kernel_process("syncd", [] {
for (;;) {
Syscall::sync();
current->sleep(1 * TICKS_PER_SECOND);
}
});
Process::create_kernel_process("Finalizer", [] {
g_finalizer = current;
current->process().set_priority(Process::LowPriority);
for (;;) {
Thread::finalize_dying_threads();
(void)current->block<Thread::SemiPermanentBlocker>(Thread::SemiPermanentBlocker::Reason::Lurking);
}
});
Process::create_kernel_process("NetworkTask", NetworkTask_main);
Scheduler::pick_next();
sti();
// This now becomes the idle process :^)
for (;;) {
asm("hlt");
}
}