Wrote new Multiboot2 table reader

src/x86/multiboot2.cpp

@@ -0,0 +1,78 @@
+#include "multiboot2.hpp"
+
+using namespace kernel;
+
+Multiboot2Info::Multiboot2Info(void* tableLocation)
+{
+    m_commandLine = NULL;
+    m_bootloader = NULL;
+    m_moduleCount = 0;
+    uint32_t* ptr = (uint32_t*) tableLocation;
+    ptr += 2;
+    while(*ptr != 0)
+    {
+        if(*ptr == T_BootCommand)
+        {
+            m_commandLine = &reinterpret_cast<TagString*>(ptr)->str;
+        }
+        else if(*ptr == T_Bootloader)
+        {
+            m_bootloader = &reinterpret_cast<TagString*>(ptr)->str;
+        }
+        else if(*ptr == T_MemoryMap)
+        {
+            unsigned int tagSize = reinterpret_cast<TagMemoryMap*>(ptr)->size - 16;
+            unsigned int entrySize = reinterpret_cast<TagMemoryMap*>(ptr)->entrySize;
+            MemoryMapEntry* entry = &reinterpret_cast<TagMemoryMap*>(ptr)->entries;
+            while(tagSize > 0)
+            {
+                m_memmap.insertEntry(entry->base, entry->length, (MemoryMap::Type) entry->type);
+                entry = (MemoryMapEntry*) (reinterpret_cast<char*>(entry) + entrySize);
+                tagSize -= entrySize;
+            }
+        }
+        else if(*ptr == T_Module)
+        {
+            TagModule* moduleTag = reinterpret_cast<TagModule*>(ptr);
+            m_modules[m_moduleCount] = Module(moduleTag->start, moduleTag->end, &moduleTag->str);
+            m_memmap.insertEntry(moduleTag->start, moduleTag->end - moduleTag->start, MemoryMap::UNAVAILABLE);
+        }
+        unsigned int size = (ptr[1] + 7) - ((ptr[1] + 7) % 8);
+        ptr += size / sizeof(uint32_t);
+    }
+}
+
+Multiboot2Info::~Multiboot2Info()
+{
+
+}
+
+bool Multiboot2Info::isValid() const
+{
+    return true;
+}
+
+MemoryMap& Multiboot2Info::getMemoryMap()
+{
+    return m_memmap;
+}
+
+const Module* Multiboot2Info::getModules() const
+{
+    return m_modules;
+}
+
+unsigned int Multiboot2Info::getModuleCount() const
+{
+    return m_moduleCount;
+}
+
+const char* Multiboot2Info::getCommandLine() const
+{
+    return m_commandLine;
+}
+
+const char* Multiboot2Info::getBootloaderName() const
+{
+    return m_bootloader;
+}