111 lines
No EOL
2.8 KiB
C++
111 lines
No EOL
2.8 KiB
C++
#include <inttypes.h>
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#include "console.hpp"
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#include "pmm.hpp"
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#include "numeric.hpp"
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#include "pointer.hpp"
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#include "multiboot.hpp"
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#include "gdt.hpp"
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#include "idt.hpp"
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#include "compat.h"
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#include "io.hpp"
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using namespace multiboot;
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using namespace console_tools;
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struct dummy;
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// Symbols generated by linker, no useful content in there...
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extern dummy kernelStartMarker;
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extern dummy kernelEndMarker;
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void timer(CpuState *cpu)
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{
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Console::main << "tick! ";
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}
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extern "C" void init(Structure const & data)
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{
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Console::main
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<< "Hello World!\n"
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<< FColor(Color::Yellow) << "Hello color!" << FColor() << "\n"
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<< BColor(Color::Blue) << "Hello blue!" << BColor() << "\n"
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<< "Hello default color.\n";
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GDT::initialize();
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Console::main
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<< "bootloader name: " << data.bootLoaderName << "\n"
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<< "command line: " << data.commandline << "\n"
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<< "count of modules: " << data.modules.length << "\n"
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<< "count of mmaps: " << data.memoryMaps.length << "\n";
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for(auto &mmap : data.memoryMaps) {
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if(mmap.length == 0) {
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continue;
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}
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if(mmap.isFree() == false) {
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continue;
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}
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Console::main
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<< "mmap: "
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<< "start: " << hex(mmap.base) << ", length: " << hex(mmap.length)
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<< ", " << mmap.entry_size
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<< ", " << sizeof(mmap)
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<< "\n";
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if(mmap.base > 0xFFFFFFFF) {
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Console::main << "mmap out of 4 gigabyte range." << "\n";
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continue;
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}
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if(mmap.isFree()) {
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// Mark all free memory free...
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physical_t lower = physical_t(mmap.base).alignUpper(4096);
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physical_t upper = physical_t(mmap.base + mmap.length).alignLower(4096);
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uint32_t ptr = lower.numeric();
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while (ptr < upper.numeric()) {
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PMM::markFree(physical_t(ptr));
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ptr += 0x1000;
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}
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}
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}
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// Mark all memory used by the kernel used...
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physical_t lower = physical_t(&kernelStartMarker).alignLower(4096);
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physical_t upper = physical_t(&kernelEndMarker).alignUpper(4096);
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uint32_t ptr = lower.numeric();
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while (ptr < upper.numeric()) {
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PMM::markUsed(physical_t(ptr));
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ptr += 0x1000;
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}
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auto freeMemory = PMM::getFreeMemory();
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Console::main
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<< "Free: "
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<< (freeMemory >> 20) << "MB, "
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<< (freeMemory >> 10) << "KB, "
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<< (freeMemory >> 0) << "B, "
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<< (freeMemory >> 12) << "Pages\n";
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IDT::initialize();
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IDT::interrupt(0x20) = Interrupt(timer);
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Console::main << "Interrupts set up.\n";
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asm volatile("sti");
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Console::main << "Interrupts enabled.\n";
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/*
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for(int i = 0; i < 10; i++) {
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bool success;
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physical_t page = PMM::alloc(success);
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Console::main << "allocated page " << i << " [" << success << "]: " << page << "\n";
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}
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*/
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while(true);
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}
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static_assert(sizeof(void*) == 4, "Target platform is not 32 bit."); |