//public static Addr kernelStack = null;
//public static Addr kernelStackBottom = null;
//public static USize kernelStackSize = null;
public static unsafe void InitializeUserMode()
{
if (!KConfig.UseUserMode)
{
return;
}
if (KConfig.UseTaskStateSegment)
{
//kernelStackSize = 256 * 4096;
TssAddr = VirtualPageManager.AllocatePages(1);
PageTable.KernelTable.SetWritable(TssAddr, 4096);
KernelMemoryMapManager.Header->Used.Add(new KernelMemoryMap(TssAddr, 4096, BootInfoMemoryType.TSS, AddressSpaceKind.Virtual));
//kernelStack = RawVirtualFrameAllocator.RequestRawVirtalMemoryPages(256); // TODO: Decrease Kernel Stack, because Stack have to be changed directly because of multi-threading.
//kernelStackBottom = kernelStack + kernelStackSize;
//KernelMessage.WriteLine("tssEntry: {0:X8}, tssKernelStack: {1:X8}-{2:X8}", tssAddr, kernelStack, kernelStackBottom - 1);
//MemoryManagement.PageTableExtensions.SetWritable(PageTable.KernelTable, kernelStack, 256 * 4096);
}
// Disabling Interrupts here is very important, otherwise we will get randomly an Invalid TSS Exception.
IDTManager.Stop();
GDT.SetupUserMode(TssAddr);
IDTManager.Start();
}
private static unsafe void InitializeUserMode()
{
if (!KConfig.UseUserMode)
{
return;
}
if (KConfig.UseTaskStateSegment)
{
TssAddr = VirtualPageManager.AllocatePages(1);
PageTable.KernelTable.SetWritable(TssAddr, 4096);
KernelMemoryMapManager.Header->Used.Add(new KernelMemoryMap(TssAddr, 4096, BootInfoMemoryType.TSS, AddressSpaceKind.Virtual));
}
// Disabling Interrupts here is very important, otherwise we will get randomly an Invalid TSS Exception.
Uninterruptible.Execute(() =>
{
GDT.SetupUserMode(TssAddr);
});
}