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Change the name of set_serial_debug(bool on_or_off) to set_serial_debug_enabled(bool desired_state). This is to make the names more expressive and less unclear as to what the function does, as it only sets the enabled state. Likewise, change the name of get_serial_debug() to is_serial_debug_enabled() in order to make clear from the name that this is simply the state of s_serial_debug_enabled. Change the name of serial_debug to s_serial_debug_enabled since this is a static bool describing this state. Finally, change the signature of set_serial_debug_enabled to return a bool, as this is more logical and understandable.
421 lines
16 KiB
C++
421 lines
16 KiB
C++
/*
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* Copyright (c) 2018-2020, 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/Types.h>
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#include <Kernel/Arch/InterruptManagement.h>
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#include <Kernel/Arch/Processor.h>
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#include <Kernel/BootInfo.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/Bus/PCI/Initializer.h>
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#include <Kernel/Bus/USB/USBManagement.h>
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#include <Kernel/Bus/VirtIO/Device.h>
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#include <Kernel/CMOS.h>
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#include <Kernel/CommandLine.h>
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#include <Kernel/Devices/Audio/Management.h>
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#include <Kernel/Devices/DeviceControlDevice.h>
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/Devices/FullDevice.h>
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#include <Kernel/Devices/HID/HIDManagement.h>
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#include <Kernel/Devices/KCOVDevice.h>
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#include <Kernel/Devices/MemoryDevice.h>
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#include <Kernel/Devices/NullDevice.h>
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#include <Kernel/Devices/PCISerialDevice.h>
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#include <Kernel/Devices/RandomDevice.h>
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#include <Kernel/Devices/SelfTTYDevice.h>
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#include <Kernel/Devices/SerialDevice.h>
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#include <Kernel/Devices/ZeroDevice.h>
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#include <Kernel/FileSystem/Ext2FileSystem.h>
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#include <Kernel/FileSystem/SysFS.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/Directory.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Firmware/ACPI/Initialize.h>
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#include <Kernel/Firmware/ACPI/Parser.h>
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#include <Kernel/Firmware/Hypervisor/VMWareBackdoor.h>
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#include <Kernel/Graphics/Console/BootFramebufferConsole.h>
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#include <Kernel/Graphics/Console/VGATextModeConsole.h>
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#include <Kernel/Graphics/GraphicsManagement.h>
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#include <Kernel/Heap/kmalloc.h>
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#include <Kernel/Interrupts/APIC.h>
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#include <Kernel/Interrupts/PIC.h>
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#include <Kernel/KSyms.h>
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#include <Kernel/Memory/MemoryManager.h>
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#include <Kernel/Multiboot.h>
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#include <Kernel/Net/NetworkTask.h>
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#include <Kernel/Net/NetworkingManagement.h>
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#include <Kernel/Panic.h>
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#include <Kernel/Prekernel/Prekernel.h>
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#include <Kernel/Process.h>
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#include <Kernel/ProcessExposed.h>
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#include <Kernel/RTC.h>
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#include <Kernel/Random.h>
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#include <Kernel/Scheduler.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Storage/StorageManagement.h>
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#include <Kernel/TTY/ConsoleManagement.h>
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#include <Kernel/TTY/PTYMultiplexer.h>
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#include <Kernel/TTY/VirtualConsole.h>
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#include <Kernel/Tasks/FinalizerTask.h>
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#include <Kernel/Tasks/SyncTask.h>
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#include <Kernel/Time/TimeManagement.h>
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#include <Kernel/WorkQueue.h>
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#include <Kernel/kstdio.h>
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// Defined in the linker script
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typedef void (*ctor_func_t)();
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extern ctor_func_t start_heap_ctors[];
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extern ctor_func_t end_heap_ctors[];
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extern ctor_func_t start_ctors[];
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extern ctor_func_t end_ctors[];
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extern size_t __stack_chk_guard;
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READONLY_AFTER_INIT size_t __stack_chk_guard __attribute__((used));
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extern "C" u8 start_of_safemem_text[];
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extern "C" u8 end_of_safemem_text[];
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extern "C" u8 start_of_safemem_atomic_text[];
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extern "C" u8 end_of_safemem_atomic_text[];
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extern "C" u8 end_of_kernel_image[];
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multiboot_module_entry_t multiboot_copy_boot_modules_array[16];
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size_t multiboot_copy_boot_modules_count;
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READONLY_AFTER_INIT bool g_in_early_boot;
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namespace Kernel {
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[[noreturn]] static void init_stage2(void*);
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static void setup_serial_debug();
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// boot.S expects these functions to exactly have the following signatures.
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// We declare them here to ensure their signatures don't accidentally change.
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extern "C" void init_finished(u32 cpu) __attribute__((used));
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extern "C" [[noreturn]] void init_ap(FlatPtr cpu, Processor* processor_info);
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extern "C" [[noreturn]] void init(BootInfo const&);
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READONLY_AFTER_INIT VirtualConsole* tty0;
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ProcessID g_init_pid { 0 };
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ALWAYS_INLINE static Processor& bsp_processor()
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{
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// This solves a problem where the bsp Processor instance
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// gets "re"-initialized in init() when we run all global constructors.
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alignas(Processor) static u8 bsp_processor_storage[sizeof(Processor)];
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return (Processor&)bsp_processor_storage;
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}
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// SerenityOS Kernel C++ entry point :^)
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//
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// This is where C++ execution begins, after boot.S transfers control here.
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//
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// The purpose of init() is to start multi-tasking. It does the bare minimum
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// amount of work needed to start the scheduler.
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//
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// Once multi-tasking is ready, we spawn a new thread that starts in the
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// init_stage2() function. Initialization continues there.
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extern "C" {
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READONLY_AFTER_INIT PhysicalAddress start_of_prekernel_image;
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READONLY_AFTER_INIT PhysicalAddress end_of_prekernel_image;
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READONLY_AFTER_INIT size_t physical_to_virtual_offset;
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READONLY_AFTER_INIT FlatPtr kernel_mapping_base;
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READONLY_AFTER_INIT FlatPtr kernel_load_base;
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#if ARCH(X86_64)
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READONLY_AFTER_INIT PhysicalAddress boot_pml4t;
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#endif
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READONLY_AFTER_INIT PhysicalAddress boot_pdpt;
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READONLY_AFTER_INIT PhysicalAddress boot_pd0;
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READONLY_AFTER_INIT PhysicalAddress boot_pd_kernel;
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READONLY_AFTER_INIT PageTableEntry* boot_pd_kernel_pt1023;
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READONLY_AFTER_INIT char const* kernel_cmdline;
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READONLY_AFTER_INIT u32 multiboot_flags;
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READONLY_AFTER_INIT multiboot_memory_map_t* multiboot_memory_map;
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READONLY_AFTER_INIT size_t multiboot_memory_map_count;
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READONLY_AFTER_INIT multiboot_module_entry_t* multiboot_modules;
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READONLY_AFTER_INIT size_t multiboot_modules_count;
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READONLY_AFTER_INIT PhysicalAddress multiboot_framebuffer_addr;
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READONLY_AFTER_INIT u32 multiboot_framebuffer_pitch;
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READONLY_AFTER_INIT u32 multiboot_framebuffer_width;
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READONLY_AFTER_INIT u32 multiboot_framebuffer_height;
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READONLY_AFTER_INIT u8 multiboot_framebuffer_bpp;
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READONLY_AFTER_INIT u8 multiboot_framebuffer_type;
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}
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Atomic<Graphics::Console*> g_boot_console;
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extern "C" [[noreturn]] UNMAP_AFTER_INIT void init(BootInfo const& boot_info)
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{
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g_in_early_boot = true;
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start_of_prekernel_image = PhysicalAddress { boot_info.start_of_prekernel_image };
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end_of_prekernel_image = PhysicalAddress { boot_info.end_of_prekernel_image };
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physical_to_virtual_offset = boot_info.physical_to_virtual_offset;
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kernel_mapping_base = boot_info.kernel_mapping_base;
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kernel_load_base = boot_info.kernel_load_base;
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#if ARCH(X86_64)
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gdt64ptr = boot_info.gdt64ptr;
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code64_sel = boot_info.code64_sel;
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boot_pml4t = PhysicalAddress { boot_info.boot_pml4t };
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#endif
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boot_pdpt = PhysicalAddress { boot_info.boot_pdpt };
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boot_pd0 = PhysicalAddress { boot_info.boot_pd0 };
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boot_pd_kernel = PhysicalAddress { boot_info.boot_pd_kernel };
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boot_pd_kernel_pt1023 = (PageTableEntry*)boot_info.boot_pd_kernel_pt1023;
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kernel_cmdline = (char const*)boot_info.kernel_cmdline;
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multiboot_flags = boot_info.multiboot_flags;
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multiboot_memory_map = (multiboot_memory_map_t*)boot_info.multiboot_memory_map;
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multiboot_memory_map_count = boot_info.multiboot_memory_map_count;
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multiboot_modules = (multiboot_module_entry_t*)boot_info.multiboot_modules;
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multiboot_modules_count = boot_info.multiboot_modules_count;
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multiboot_framebuffer_addr = PhysicalAddress { boot_info.multiboot_framebuffer_addr };
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multiboot_framebuffer_pitch = boot_info.multiboot_framebuffer_pitch;
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multiboot_framebuffer_width = boot_info.multiboot_framebuffer_width;
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multiboot_framebuffer_height = boot_info.multiboot_framebuffer_height;
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multiboot_framebuffer_bpp = boot_info.multiboot_framebuffer_bpp;
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multiboot_framebuffer_type = boot_info.multiboot_framebuffer_type;
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setup_serial_debug();
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// We need to copy the command line before kmalloc is initialized,
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// as it may overwrite parts of multiboot!
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CommandLine::early_initialize(kernel_cmdline);
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memcpy(multiboot_copy_boot_modules_array, multiboot_modules, multiboot_modules_count * sizeof(multiboot_module_entry_t));
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multiboot_copy_boot_modules_count = multiboot_modules_count;
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new (&bsp_processor()) Processor();
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bsp_processor().early_initialize(0);
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// Invoke the constructors needed for the kernel heap
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for (ctor_func_t* ctor = start_heap_ctors; ctor < end_heap_ctors; ctor++)
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(*ctor)();
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kmalloc_init();
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load_kernel_symbol_table();
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bsp_processor().initialize(0);
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CommandLine::initialize();
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Memory::MemoryManager::initialize(0);
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// NOTE: If the bootloader provided a framebuffer, then set up an initial console.
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// If the bootloader didn't provide a framebuffer, then set up an initial text console.
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// We do so we can see the output on the screen as soon as possible.
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if (!kernel_command_line().is_early_boot_console_disabled()) {
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if (!multiboot_framebuffer_addr.is_null() && multiboot_framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_RGB) {
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g_boot_console = &try_make_lock_ref_counted<Graphics::BootFramebufferConsole>(multiboot_framebuffer_addr, multiboot_framebuffer_width, multiboot_framebuffer_height, multiboot_framebuffer_pitch).value().leak_ref();
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} else {
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g_boot_console = &Graphics::VGATextModeConsole::initialize().leak_ref();
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}
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}
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dmesgln("Starting SerenityOS...");
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DeviceManagement::initialize();
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SysFSComponentRegistry::initialize();
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DeviceManagement::the().attach_null_device(*NullDevice::must_initialize());
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DeviceManagement::the().attach_console_device(*ConsoleDevice::must_create());
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DeviceManagement::the().attach_device_control_device(*DeviceControlDevice::must_create());
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MM.unmap_prekernel();
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// Ensure that the safemem sections are not empty. This could happen if the linker accidentally discards the sections.
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VERIFY(+start_of_safemem_text != +end_of_safemem_text);
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VERIFY(+start_of_safemem_atomic_text != +end_of_safemem_atomic_text);
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// Invoke all static global constructors in the kernel.
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// Note that we want to do this as early as possible.
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for (ctor_func_t* ctor = start_ctors; ctor < end_ctors; ctor++)
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(*ctor)();
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InterruptManagement::initialize();
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ACPI::initialize();
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// Initialize TimeManagement before using randomness!
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TimeManagement::initialize(0);
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__stack_chk_guard = get_fast_random<size_t>();
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ProcFSComponentRegistry::initialize();
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Process::initialize();
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Scheduler::initialize();
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if (APIC::initialized() && APIC::the().enabled_processor_count() > 1) {
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// We must set up the AP boot environment before switching to a kernel process,
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// as pages below address USER_RANGE_BASE are only accesible through the kernel
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// page directory.
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APIC::the().setup_ap_boot_environment();
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}
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{
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LockRefPtr<Thread> init_stage2_thread;
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(void)Process::create_kernel_process(init_stage2_thread, KString::must_create("init_stage2"sv), init_stage2, nullptr, THREAD_AFFINITY_DEFAULT, Process::RegisterProcess::No);
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// We need to make sure we drop the reference for init_stage2_thread
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// before calling into Scheduler::start, otherwise we will have a
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// dangling Thread that never gets cleaned up
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}
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Scheduler::start();
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VERIFY_NOT_REACHED();
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}
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//
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// This is where C++ execution begins for APs, after boot.S transfers control here.
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//
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// The purpose of init_ap() is to initialize APs for multi-tasking.
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//
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extern "C" [[noreturn]] UNMAP_AFTER_INIT void init_ap(FlatPtr cpu, Processor* processor_info)
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{
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processor_info->early_initialize(cpu);
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processor_info->initialize(cpu);
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Memory::MemoryManager::initialize(cpu);
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Scheduler::set_idle_thread(APIC::the().get_idle_thread(cpu));
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Scheduler::start();
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VERIFY_NOT_REACHED();
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}
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//
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// This method is called once a CPU enters the scheduler and its idle thread
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// At this point the initial boot stack can be freed
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//
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extern "C" UNMAP_AFTER_INIT void init_finished(u32 cpu)
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{
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if (cpu == 0) {
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// TODO: we can reuse the boot stack, maybe for kmalloc()?
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} else {
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APIC::the().init_finished(cpu);
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TimeManagement::initialize(cpu);
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}
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}
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void init_stage2(void*)
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{
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// This is a little bit of a hack. We can't register our process at the time we're
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// creating it, but we need to be registered otherwise finalization won't be happy.
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// The colonel process gets away without having to do this because it never exits.
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Process::register_new(Process::current());
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WorkQueue::initialize();
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if (kernel_command_line().is_smp_enabled() && APIC::initialized() && APIC::the().enabled_processor_count() > 1) {
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// We can't start the APs until we have a scheduler up and running.
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// We need to be able to process ICI messages, otherwise another
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// core may send too many and end up deadlocking once the pool is
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// exhausted
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APIC::the().boot_aps();
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}
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// Initialize the PCI Bus as early as possible, for early boot (PCI based) serial logging
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PCI::initialize();
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if (!PCI::Access::is_disabled()) {
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PCISerialDevice::detect();
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}
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VirtualFileSystem::initialize();
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if (!is_serial_debug_enabled())
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(void)SerialDevice::must_create(0).leak_ref();
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(void)SerialDevice::must_create(1).leak_ref();
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(void)SerialDevice::must_create(2).leak_ref();
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(void)SerialDevice::must_create(3).leak_ref();
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VMWareBackdoor::the(); // don't wait until first mouse packet
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MUST(HIDManagement::initialize());
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GraphicsManagement::the().initialize();
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ConsoleManagement::the().initialize();
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SyncTask::spawn();
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FinalizerTask::spawn();
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auto boot_profiling = kernel_command_line().is_boot_profiling_enabled();
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if (!PCI::Access::is_disabled()) {
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USB::USBManagement::initialize();
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}
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FirmwareSysFSDirectory::initialize();
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if (!PCI::Access::is_disabled()) {
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VirtIO::detect();
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}
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NetworkingManagement::the().initialize();
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Syscall::initialize();
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#ifdef ENABLE_KERNEL_COVERAGE_COLLECTION
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(void)KCOVDevice::must_create().leak_ref();
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#endif
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(void)MemoryDevice::must_create().leak_ref();
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(void)ZeroDevice::must_create().leak_ref();
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(void)FullDevice::must_create().leak_ref();
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(void)RandomDevice::must_create().leak_ref();
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(void)SelfTTYDevice::must_create().leak_ref();
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PTYMultiplexer::initialize();
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AudioManagement::the().initialize();
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StorageManagement::the().initialize(kernel_command_line().root_device(), kernel_command_line().is_force_pio(), kernel_command_line().is_nvme_polling_enabled());
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if (VirtualFileSystem::the().mount_root(StorageManagement::the().root_filesystem()).is_error()) {
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PANIC("VirtualFileSystem::mount_root failed");
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}
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// Switch out of early boot mode.
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g_in_early_boot = false;
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// NOTE: Everything marked READONLY_AFTER_INIT becomes non-writable after this point.
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MM.protect_readonly_after_init_memory();
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// NOTE: Everything in the .ksyms section becomes read-only after this point.
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MM.protect_ksyms_after_init();
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// NOTE: Everything marked UNMAP_AFTER_INIT becomes inaccessible after this point.
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MM.unmap_text_after_init();
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LockRefPtr<Thread> thread;
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auto userspace_init = kernel_command_line().userspace_init();
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auto init_args = kernel_command_line().userspace_init_args();
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auto init_or_error = Process::try_create_user_process(thread, userspace_init, UserID(0), GroupID(0), move(init_args), {}, tty0);
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if (init_or_error.is_error())
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PANIC("init_stage2: Error spawning init process: {}", init_or_error.error());
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g_init_pid = init_or_error.value()->pid();
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thread->set_priority(THREAD_PRIORITY_HIGH);
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if (boot_profiling) {
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dbgln("Starting full system boot profiling");
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MutexLocker mutex_locker(Process::current().big_lock());
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auto const enable_all = ~(u64)0;
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auto result = Process::current().profiling_enable(-1, enable_all);
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VERIFY(!result.is_error());
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}
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NetworkTask::spawn();
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Process::current().sys$exit(0);
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VERIFY_NOT_REACHED();
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}
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UNMAP_AFTER_INIT void setup_serial_debug()
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{
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// serial_debug will output all the dbgln() data to COM1 at
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// 8-N-1 57600 baud. this is particularly useful for debugging the boot
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// process on live hardware.
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if (StringView { kernel_cmdline, strlen(kernel_cmdline) }.contains("serial_debug"sv)) {
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set_serial_debug_enabled(true);
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}
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}
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// Define some Itanium C++ ABI methods to stop the linker from complaining.
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// If we actually call these something has gone horribly wrong
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void* __dso_handle __attribute__((visibility("hidden")));
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}
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