static void MapKernelImage()
{
var phys = Address.KernelElfSection;
var diff = Address.KernelBaseVirt - Address.KernelBasePhys;
var endPhys = phys + OriginalKernelElf.TotalFileSize;
var addr = phys;
KernelMessage.WriteLine("Mapping Kernel Image from physical {0:X8} to virtual {1:X8}", phys, phys + diff);
while (addr < endPhys)
{
PageTable.MapVirtualAddressToPhysical(addr + diff, addr);
addr += 0x1000;
}
}
/// <summary>
/// Returns raw, unmanaged Memory.
/// Consumer: Kernel, Memory allocators
/// Shoud be used for larger Chunks.
/// </summary>
internal unsafe static Addr RequestRawVirtalMemoryPages(uint pages)
{
Addr virt = _nextVirtAddr;
var head = PageFrameManager.AllocatePages(PageFrameRequestFlags.Default, pages);
if (head == null)
{
return(Addr.Zero);
}
var p = head;
for (var i = 0; i < pages; i++)
{
PageTable.MapVirtualAddressToPhysical(_nextVirtAddr, p->PhysicalAddress);
_nextVirtAddr += 4096;
p = p->Next;
}
return(virt);
}
