Daniel Hammer
116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
/*
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* main.cpp
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* Kernel entry point
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* Copyright (c) 2025 Daniel Hammer, Limine Contributors (via Limine C++ example)
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*/
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#include <cstdint>
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#include <cstddef>
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#include <limine.h>
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#include <Hal/GDT.hpp>
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#include <Terminal/Terminal.hpp>
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#include <Libraries/String.hpp>
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#include <Efi/UEFI.hpp>
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#include <Common/Panic.hpp>
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#include <Memory/Memmap.hpp>
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#include <Memory/Heap.hpp>
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#include <Memory/HHDM.hpp>
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#include <CppLib/Stream.hpp>
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#include <CppLib/Vector.hpp>
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#include <CppLib/CString.hpp>
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#include <Platform/Limine.hpp>
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#include <Platform/Util.hpp>
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#include <Libraries/Memory.hpp>
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#include <Hal/IDT.hpp>
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#include <Memory/PageFrameAllocator.hpp>
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#include <Memory/HHDM.hpp>
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#include <Io/IoPort.hpp>
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#include <Memory/Paging.hpp>
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#include <ACPI/ACPI.hpp>
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using namespace Kt;
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namespace Memory {
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HeapAllocator* g_heap;
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PageFrameAllocator* g_pfa;
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uint64_t HHDMBase;
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};
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KernelOutStream kout{};
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KernelErrorStream kerr{};
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// Extern declarations for global constructors array.
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extern void (*__init_array[])();
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extern void (*__init_array_end[])();
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extern "C" uint64_t KernelStartSymbol;
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extern "C" uint64_t KernelEndSymbol;
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extern "C" void kmain() {
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if (LIMINE_BASE_REVISION_SUPPORTED == false) {
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Hal::Halt();
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}
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// Call global constructors.
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for (std::size_t i = 0; &__init_array[i] != __init_array_end; i++) {
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__init_array[i]();
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}
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if (framebuffer_request.response == nullptr
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|| framebuffer_request.response->framebuffer_count < 1) {
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Hal::Halt();
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}
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limine_framebuffer *framebuffer{framebuffer_request.response->framebuffers[0]};
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Kt::Initialize(
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(uint32_t*)framebuffer->address,
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framebuffer->width,
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framebuffer->height,
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framebuffer->pitch,
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framebuffer->red_mask_size,
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framebuffer->red_mask_shift,
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framebuffer->green_mask_size,
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framebuffer->green_mask_shift,
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framebuffer->blue_mask_size,
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framebuffer->blue_mask_shift
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);
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#if defined (__x86_64__)
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Hal::PrepareGDT();
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Hal::BridgeLoadGDT();
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#endif
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uint64_t hhdm_offset = hhdm_request.response->offset;
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Memory::HHDMBase = hhdm_offset;
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if (memmap_request.response != nullptr) {
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Kt::KernelLogStream(OK, "Mem") << "Creating PageFrameAllocator";
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Memory::PageFrameAllocator pmm(Memory::Scan(memmap_request.response));
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Memory::g_pfa = &pmm;
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Kt::KernelLogStream(OK, "Mem") << "Creating HeapAllocator";
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Memory::HeapAllocator heap{};
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Memory::g_heap = &heap;
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heap.Walk();
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} else {
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Panic("System memory map missing!", nullptr);
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}
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#if defined (__x86_64__)
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Hal::IDTInitialize();
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Memory::VMM::Paging g_paging{};
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g_paging.Init((uint64_t)&KernelStartSymbol, ((uint64_t)&KernelEndSymbol - (uint64_t)&KernelStartSymbol), memmap_request.response);
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#endif
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Hal::ACPI g_acpi((Hal::ACPI::XSDP*)Memory::HHDM(rsdp_request.response->address));
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Hal::Halt();
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}
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