mirror of
https://github.com/Fennix-Project/Kernel.git
synced 2025-07-11 07:19:20 +00:00
Restructured and rewritten entire codebase
This commit is contained in:
Alex
513
kernel.cpp
Normal file
513
kernel.cpp
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@ -0,0 +1,513 @@
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "kernel.h"
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#include <filesystem/mounts.hpp>
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#include <filesystem/ustar.hpp>
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#include <memory.hpp>
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#include <convert.h>
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#include <ints.hpp>
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#include <printf.h>
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#include <lock.hpp>
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#include <uart.hpp>
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#include <debug.h>
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#include <smp.hpp>
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#include <cargs.h>
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#include <io.h>
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#include "core/smbios.hpp"
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#include "tests/t.h"
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bool DebuggerIsAttached = false;
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extern bool EnableProfiler;
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NewLock(KernelLock);
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using vfs::Node;
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using vfs::NodeType;
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__aligned(16) BootInfo bInfo{};
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struct KernelConfig Config = {
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.AllocatorType = Memory::liballoc11,
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.SchedulerType = Multi,
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.ModuleDirectory = {'/', 'm', 'o', 'd', 'u', 'l', 'e', 's', '\0'},
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.InitPath = {'/', 'b', 'i', 'n', '/', 'i', 'n', 'i', 't', '\0'},
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.UseLinuxSyscalls = false,
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.InterruptsOnCrash = true,
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.Cores = 0,
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.IOAPICInterruptCore = 0,
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.UnlockDeadLock = false,
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.SIMD = false,
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.BootAnimation = false,
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};
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Video::Display *Display = nullptr;
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SymbolResolver::Symbols *KernelSymbolTable = nullptr;
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Power::Power *PowerManager = nullptr;
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Time::time *TimeManager = nullptr;
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PCI::PCI *PCIManager = nullptr;
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vfs::Virtual *fs = nullptr;
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vfs::Node *DevFS = nullptr;
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vfs::Node *MntFS = nullptr;
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vfs::Node *ProcFS = nullptr;
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vfs::Node *VarLogFS = nullptr;
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Tasking::Task *TaskManager = nullptr;
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// For the Display class. Printing on first buffer as default.
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int PutCharBufferIndex = 0;
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EXTERNC void putchar(char c)
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{
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if (Display)
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Display->Print(c, PutCharBufferIndex);
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else
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UniversalAsynchronousReceiverTransmitter::UART(UniversalAsynchronousReceiverTransmitter::COM1).Write(c);
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}
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EXTERNC void KPrint(const char *Format, ...)
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{
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SmartLock(KernelLock);
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if (TimeManager)
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{
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uint64_t Nanoseconds = TimeManager->GetNanosecondsSinceClassCreation();
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if (Nanoseconds != 0)
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{
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#if defined(a64)
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printf("\eCCCCCC[\e00AEFF%lu.%07lu\eCCCCCC] ",
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Nanoseconds / 10000000, Nanoseconds % 10000000);
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#elif defined(a32)
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printf("\eCCCCCC[\e00AEFF%llu.%07llu\eCCCCCC] ",
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Nanoseconds / 10000000, Nanoseconds % 10000000);
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#elif defined(aa64)
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printf("\eCCCCCC[\e00AEFF%lu.%07lu\eCCCCCC] ",
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Nanoseconds / 10000000, Nanoseconds % 10000000);
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#endif
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}
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}
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va_list args;
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va_start(args, Format);
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vprintf(Format, args);
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va_end(args);
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printf("\eCCCCCC\n");
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if (!Config.BootAnimation && Display)
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Display->SetBuffer(0);
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}
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EXTERNC NIF void Main()
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{
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Display = new Video::Display(bInfo.Framebuffer[0]);
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KPrint("%s - %s [\e058C19%s\eFFFFFF]",
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KERNEL_NAME, KERNEL_VERSION, GIT_COMMIT_SHORT);
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KPrint("CPU: \e058C19%s \e8822AA%s \e8888FF%s",
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CPU::Hypervisor(), CPU::Vendor(), CPU::Name());
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if (Display->GetFramebufferStruct().BitsPerPixel != 32)
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KPrint("\eFF5500Framebuffer is not 32 bpp. This may cause issues.");
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debug("CPU: %s %s %s",
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CPU::Hypervisor(), CPU::Vendor(), CPU::Name());
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if (DebuggerIsAttached)
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KPrint("\eFFA500Kernel debugger detected.");
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#if defined(a86) && defined(DEBUG)
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uint8_t lpt1 = inb(0x378);
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uint8_t lpt2 = inb(0x278);
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uint8_t lpt3 = inb(0x3BC);
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uint8_t com1 = inb(0x3F8);
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uint8_t com2 = inb(0x2F8);
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uint8_t com3 = inb(0x3E8);
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uint8_t com4 = inb(0x2E8);
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if (lpt1 != 0xFF)
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KPrint("LPT1 is present.");
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if (lpt2 != 0xFF)
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KPrint("LPT2 is present.");
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if (lpt3 != 0xFF)
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KPrint("LPT3 is present.");
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if (com1 != 0xFF)
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KPrint("COM1 is present.");
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if (com2 != 0xFF)
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KPrint("COM2 is present.");
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if (com3 != 0xFF)
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KPrint("COM3 is present.");
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if (com4 != 0xFF)
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KPrint("COM4 is present.");
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KPrint("Display: %dx%d %d bpp \eFF0000R:%d %d \e00FF00G: %d %d \e0000FFB: %d %d",
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Display->GetFramebufferStruct().Width,
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Display->GetFramebufferStruct().Height,
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Display->GetFramebufferStruct().BitsPerPixel,
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Display->GetFramebufferStruct().RedMaskSize,
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Display->GetFramebufferStruct().RedMaskShift,
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Display->GetFramebufferStruct().GreenMaskSize,
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Display->GetFramebufferStruct().GreenMaskShift,
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Display->GetFramebufferStruct().BlueMaskSize,
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Display->GetFramebufferStruct().BlueMaskShift);
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#endif
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/**************************************************************************************/
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KPrint("Reading Kernel Parameters");
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ParseConfig((char *)bInfo.Kernel.CommandLine, &Config);
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KPrint("Initializing CPU Features");
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CPU::InitializeFeatures(0);
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KPrint("Initializing GDT and IDT");
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Interrupts::Initialize(0);
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KPrint("Loading Kernel Symbols");
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KernelSymbolTable =
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new SymbolResolver::Symbols((uintptr_t)bInfo.Kernel.FileBase);
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if (!KernelSymbolTable->SymTableExists)
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KernelSymbolTable->AddSymbolInfoFromGRUB(bInfo.Kernel.Symbols.Num,
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bInfo.Kernel.Symbols.EntSize,
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bInfo.Kernel.Symbols.Shndx,
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bInfo.Kernel.Symbols.Sections);
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if (Config.BootAnimation)
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{
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Display->CreateBuffer(0, 0, 1);
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Display->SetDoNotScroll(true, 1);
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Video::ScreenBuffer *buf = Display->GetBuffer(1);
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Video::FontInfo fi = Display->GetCurrentFont()->GetInfo();
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Display->SetBufferCursor(1, 0, buf->Height - fi.Height);
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PutCharBufferIndex = 1;
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printf("Fennix Operating System - %s [\e058C19%s\eFFFFFF]\n",
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KERNEL_VERSION, GIT_COMMIT_SHORT);
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Display->SetBuffer(1);
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PutCharBufferIndex = 0;
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}
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KPrint("Initializing Power Manager");
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PowerManager = new Power::Power;
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KPrint("Enabling Interrupts on Bootstrap Processor");
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Interrupts::Enable(0);
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#if defined(a86)
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PowerManager->InitDSDT();
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#elif defined(aa64)
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#endif
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KPrint("Initializing Timers");
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TimeManager = new Time::time;
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TimeManager->FindTimers(PowerManager->GetACPI());
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KPrint("Initializing PCI Manager");
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PCIManager = new PCI::PCI;
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foreach (auto Device in PCIManager->GetDevices())
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{
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KPrint("PCI: \e8888FF%s \eCCCCCC/ \e8888FF%s \eCCCCCC/ \e8888FF%s \eCCCCCC/ \e8888FF%s \eCCCCCC/ \e8888FF%s",
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PCI::Descriptors::GetVendorName(Device.Header->VendorID),
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PCI::Descriptors::GetDeviceName(Device.Header->VendorID,
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Device.Header->DeviceID),
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PCI::Descriptors::DeviceClasses[Device.Header->Class],
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PCI::Descriptors::GetSubclassName(Device.Header->Class,
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Device.Header->Subclass),
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PCI::Descriptors::GetProgIFName(Device.Header->Class,
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Device.Header->Subclass,
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Device.Header->ProgIF));
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}
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KPrint("Initializing Bootstrap Processor Timer");
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Interrupts::InitializeTimer(0);
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KPrint("Initializing SMP");
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SMP::Initialize(PowerManager->GetMADT());
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KPrint("Initializing Filesystem...");
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fs = new vfs::Virtual;
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vfs::Node *root = fs->GetRootNode();
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if (root->Children.size() == 0)
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fs->nRoot = new vfs::vfsRoot("/", fs);
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for (size_t i = 0; i < MAX_MODULES; i++)
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{
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if (!bInfo.Modules[i].Address)
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continue;
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if (strcmp(bInfo.Modules[i].CommandLine, "initrd") == 0)
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{
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debug("Found initrd at %p", bInfo.Modules[i].Address);
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static char initrd = 0;
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if (!initrd++)
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{
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uintptr_t initrdAddress = (uintptr_t)bInfo.Modules[i].Address;
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vfs::USTAR *ustar = new vfs::USTAR;
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ustar->ReadArchive(initrdAddress, fs);
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}
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}
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}
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if (!fs->PathExists("/dev"))
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DevFS = new vfs::Node(fs->nRoot, "dev", vfs::DIRECTORY);
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else
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{
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vfs::RefNode *dev = fs->Open("/dev");
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if (dev->node->Type != NodeType::DIRECTORY)
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{
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KPrint("\eE85230/dev is not a directory! Halting...");
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CPU::Stop();
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}
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DevFS = dev->node;
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delete dev;
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}
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new vfs::NullDevice();
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new vfs::RandomDevice();
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new vfs::ZeroDevice();
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if (!fs->PathExists("/mnt"))
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MntFS = new vfs::Node(fs->nRoot, "mnt", vfs::DIRECTORY);
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else
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{
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vfs::RefNode *mnt = fs->Open("/mnt");
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if (mnt->node->Type != NodeType::DIRECTORY)
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{
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KPrint("\eE85230/mnt is not a directory! Halting...");
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CPU::Stop();
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}
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MntFS = mnt->node;
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delete mnt;
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}
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if (!fs->PathExists("/proc"))
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ProcFS = new vfs::Node(fs->nRoot, "proc", vfs::DIRECTORY);
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else
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{
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vfs::RefNode *proc = fs->Open("/proc", nullptr);
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if (proc->node->Type != NodeType::DIRECTORY)
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{
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KPrint("\eE85230/proc is not a directory! Halting...");
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CPU::Stop();
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}
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ProcFS = proc->node;
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delete proc;
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}
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if (!fs->PathExists("/var"))
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{
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vfs::Node *var = new vfs::Node(fs->nRoot, "var", vfs::DIRECTORY);
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VarLogFS = new vfs::Node(var, "log", vfs::DIRECTORY);
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}
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else
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{
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vfs::RefNode *var = fs->Open("/var", nullptr);
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if (var->node->Type != NodeType::DIRECTORY)
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{
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KPrint("\eE85230/var is not a directory! Halting...");
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CPU::Stop();
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}
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VarLogFS = var->node;
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delete var;
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if (!fs->PathExists("/var/log"))
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VarLogFS = new vfs::Node(VarLogFS, "log", vfs::DIRECTORY);
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else
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{
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vfs::RefNode *var_log = fs->Open("/var/log", nullptr);
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if (var_log->node->Type != NodeType::DIRECTORY)
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{
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KPrint("\eE85230/var/log is not a directory! Halting...");
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CPU::Stop();
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}
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VarLogFS = var_log->node;
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delete var_log;
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}
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}
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KPrint("\e058C19################################");
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TaskManager = new Tasking::Task(Tasking::IP(KernelMainThread));
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CPU::Halt(true);
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}
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typedef void (*CallPtr)(void);
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extern CallPtr __init_array_start[0], __init_array_end[0];
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extern CallPtr __fini_array_start[0], __fini_array_end[0];
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EXTERNC __no_stack_protector NIF void Entry(BootInfo *Info)
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{
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trace("Hello, World!");
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if (strcmp(CPU::Hypervisor(), x86_CPUID_VENDOR_TCG) == 0)
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{
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debug("\n\n----------------------------------------\nDEBUGGER DETECTED\n----------------------------------------\n\n");
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DebuggerIsAttached = true;
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}
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memcpy(&bInfo, Info, sizeof(BootInfo));
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debug("BootInfo structure is at %p", &bInfo);
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// https://wiki.osdev.org/Calling_Global_Constructors
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trace("There are %d constructors to call",
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__init_array_end - __init_array_start);
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for (CallPtr *func = __init_array_start; func != __init_array_end; func++)
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(*func)();
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|
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#ifdef a86
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if (!bInfo.SMBIOSPtr)
|
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{
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trace("SMBIOS was not provided by the bootloader. Trying to find it manually.");
|
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for (uintptr_t i = 0xF0000; i < 0x100000; i += 16)
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{
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if (memcmp((void *)i, "_SM_", 4) == 0 ||
|
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memcmp((void *)i, "_SM3_", 5) == 0)
|
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{
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bInfo.SMBIOSPtr = (void *)i;
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trace("Found SMBIOS at %#lx", i);
|
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}
|
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}
|
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}
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|
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if (!bInfo.RSDP)
|
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{
|
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trace("RSDP was not provided by the bootloader. Trying to find it manually.");
|
||||
/* FIXME: Not always shifting by 4 will work. */
|
||||
uintptr_t EBDABase = (uintptr_t)mminw((void *)0x40E) << 4;
|
||||
|
||||
for (uintptr_t ptr = EBDABase;
|
||||
ptr < 0x100000; /* 1MB */
|
||||
ptr += 16)
|
||||
{
|
||||
if (unlikely(ptr == EBDABase + 0x400))
|
||||
{
|
||||
trace("EBDA is full. Trying to find RSDP in the BIOS area.");
|
||||
break;
|
||||
}
|
||||
|
||||
BootInfo::RSDPInfo *rsdp = (BootInfo::RSDPInfo *)ptr;
|
||||
if (memcmp(rsdp->Signature, "RSD PTR ", 8) == 0)
|
||||
{
|
||||
bInfo.RSDP = (BootInfo::RSDPInfo *)rsdp;
|
||||
trace("Found RSDP at %#lx", rsdp);
|
||||
}
|
||||
}
|
||||
|
||||
for (uintptr_t ptr = 0xE0000;
|
||||
ptr < 0x100000; /* 1MB */
|
||||
ptr += 16)
|
||||
{
|
||||
BootInfo::RSDPInfo *rsdp = (BootInfo::RSDPInfo *)ptr;
|
||||
if (memcmp(rsdp->Signature, "RSD PTR ", 8) == 0)
|
||||
{
|
||||
bInfo.RSDP = (BootInfo::RSDPInfo *)rsdp;
|
||||
trace("Found RSDP at %#lx", rsdp);
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
InitializeMemoryManagement();
|
||||
|
||||
void *KernelStackAddress = KernelAllocator.RequestPages(TO_PAGES(STACK_SIZE));
|
||||
uintptr_t KernelStack = (uintptr_t)KernelStackAddress + STACK_SIZE - 0x10;
|
||||
debug("Kernel stack: %#lx-%#lx", KernelStackAddress, KernelStack);
|
||||
#if defined(a64)
|
||||
asmv("mov %0, %%rsp"
|
||||
:
|
||||
: "r"(KernelStack)
|
||||
: "memory");
|
||||
asmv("mov $0, %rbp");
|
||||
#elif defined(a32)
|
||||
asmv("mov %0, %%esp"
|
||||
:
|
||||
: "r"(KernelStack)
|
||||
: "memory");
|
||||
asmv("mov $0, %ebp");
|
||||
#elif defined(aa64)
|
||||
#warning "Kernel stack is not set!"
|
||||
#endif
|
||||
|
||||
#ifdef DEBUG
|
||||
/* I had to do this because KernelAllocator
|
||||
* is a global constructor but we need
|
||||
* memory management to be initialized first.
|
||||
*/
|
||||
TestMemoryAllocation();
|
||||
TestString();
|
||||
Test_std();
|
||||
#endif
|
||||
EnableProfiler = true;
|
||||
Main();
|
||||
}
|
||||
|
||||
#pragma GCC diagnostic push
|
||||
#pragma GCC diagnostic ignored "-Wdelete-non-virtual-dtor"
|
||||
extern "C" void __cxa_finalize(void *);
|
||||
EXTERNC __no_stack_protector void BeforeShutdown(bool Reboot)
|
||||
{
|
||||
/* TODO: Announce shutdown */
|
||||
|
||||
trace("\n\n\n#################### SYSTEM SHUTTING DOWN ####################\n\n");
|
||||
|
||||
KPrint("%s...", Reboot ? "Rebooting" : "Shutting down");
|
||||
|
||||
if (NIManager)
|
||||
delete NIManager, NIManager = nullptr;
|
||||
|
||||
if (DiskManager)
|
||||
delete DiskManager, DiskManager = nullptr;
|
||||
|
||||
if (ModuleManager)
|
||||
delete ModuleManager, ModuleManager = nullptr;
|
||||
|
||||
if (TaskManager && !TaskManager->IsPanic())
|
||||
{
|
||||
TaskManager->SignalShutdown();
|
||||
delete TaskManager, TaskManager = nullptr;
|
||||
}
|
||||
|
||||
if (fs)
|
||||
delete fs, fs = nullptr;
|
||||
|
||||
if (TimeManager)
|
||||
delete TimeManager, TimeManager = nullptr;
|
||||
|
||||
// if (Display)
|
||||
// delete Display, Display = nullptr;
|
||||
// PowerManager should not be called
|
||||
|
||||
// https://wiki.osdev.org/Calling_Global_Constructors
|
||||
debug("Calling destructors...");
|
||||
for (CallPtr *func = __fini_array_start; func != __fini_array_end; func++)
|
||||
(*func)();
|
||||
__cxa_finalize(nullptr);
|
||||
debug("Done.");
|
||||
}
|
||||
#pragma GCC diagnostic pop
|
||||
|
||||
EXTERNC void TaskingPanic()
|
||||
{
|
||||
if (TaskManager)
|
||||
TaskManager->Panic();
|
||||
}
|
||||
Reference in New Issue
Block a user