public MemoryRegion FitToPageCeil()
{
var start = KMath.AlignValueCeil(Start, 4096);
var end = KMath.AlignValueCeil(Start + Size, 4096);
return(FromLocation(start, end));
}
internal static unsafe void SetupAllocator()
{
Allocator = new RuntimeAllocator();
var ptr = (byte *)SysCalls.RequestMemory(KMath.AlignValueCeil(Allocator.headSize, 4096));
for (var i = 0; i < Allocator.headSize; i++)
{
*(ptr + i) = 0; // TODO: Optimize
}
Allocator.List_heads = (malloc_meta **)ptr;
AllocatorInitialized = true;
}
private static uint Cmd_RequestMemory(SysCallContext *context, SystemMessage *args)
{
var size = args->Arg1;
size = KMath.AlignValueCeil(size, 4096);
var proc = Scheduler.GetCurrentThread().Process;
var map = PhysicalPageManager.AllocateRegion(size);
var virtAddr = proc.UserPageAllocator.AllocatePagesAddr(size / 4096);
Scheduler.GetCurrentThread().Process.PageTable.Map(virtAddr, map.Start, PhysicalPageManager.GetAllocatorByAddr(map.Start));
return(virtAddr);
}
public static void Setup()
{
KernelMessage.WriteLine("Multiboot Flags: {0:X}", Multiboot.Flags);
BootInfo = (BootInfoHeader *)Address.KernelBootInfo;
BootInfo->Magic = lonos.kernel.core.BootInfoHeader.BootInfoMagic;
BootInfo->HeapStart = KMath.AlignValueCeil(Address.OriginalKernelElfSection + LoaderStart.OriginalKernelElf.TotalFileSize, 0x1000);
BootInfo->HeapSize = 0;
BootInfo->InstalledPhysicalMemory = 128 * 1024 * 1024;
SetupVideoInfo();
SetupMemoryMap();
}
public static void Setup()
{
KernelMessage.WriteLine("Multiboot Flags: {0:X}", Multiboot.Flags);
BootInfo = (BootInfoHeader *)Address.KernelBootInfo;
BootInfo->Magic = BootInfoHeader.BootInfoMagic;
BootInfo->HeapStart = KMath.AlignValueCeil(Address.OriginalKernelElfSection + LoaderStart.OriginalKernelElf.TotalFileSize, 0x1000);
BootInfo->HeapSize = 0;
BootInfo->InstalledPhysicalMemory = 256 * 1024 * 1024;
BootInfo->PageTableType = KConfig.UsePAE ? PageTableType.PAE : PageTableType.X86;
BootInfo->KernelBootStartCycles = PerformanceCounter.KernelBootStartCycles;
SetupVideoInfo();
SetupMemoryMap();
}
public unsafe static void Setup()
{
kmallocAllocator = new Allocator();
var ptr = (byte *)RawVirtualFrameAllocator.RequestRawVirtalMemoryPages(KMath.AlignValueCeil(Allocator.headSize, 4096));
for (var i = 0; i < Allocator.headSize; i++)
{
*(ptr + i) = 0;
}
kmallocAllocator.list_heads = (malloc_meta **)ptr;
ManagedMemoy.useAllocator = true;
KernelMessage.WriteLine("Memory free: {0} MB", (PageFrameManager.PagesAvailable * 4096) / 1024 / 1024);
}
public static unsafe void Setup()
{
kmallocAllocator = new KernelAllocator();
var ptr = (byte *)VirtualPageManager.AllocatePages(KMath.AlignValueCeil(Allocator.headSize, 4096));
for (var i = 0; i < Allocator.headSize; i++)
{
*(ptr + i) = 0;
}
kmallocAllocator.List_heads = (malloc_meta **)ptr;
ManagedMemory.UseAllocator = true;
KernelMessage.WriteLine("EarlyBootBytesUsed: {0} bytes", ManagedMemory.EarlyBootBytesUsed);
KernelMessage.WriteLine("Memory free: {0} MB", PhysicalPageManager.FreePages * 4096 / 1024 / 1024);
}
static void SetupMemoryMap()
{
uint customMaps = 7;
var mbMapCount = Multiboot.MemoryMapCount;
BootInfo->MemoryMapLength = mbMapCount + customMaps;
BootInfo->MemoryMapArray = (BootInfoMemory *)MallocBootInfoData((USize)(sizeof(MultiBootMemoryMap) * MemoryMapReserve));
for (uint i = 0; i < mbMapCount; i++)
{
BootInfo->MemoryMapArray[i].Start = Multiboot.GetMemoryMapBase(i);
BootInfo->MemoryMapArray[i].Size = Multiboot.GetMemoryMapLength(i);
var memType = BootInfoMemoryType.Reserved;
var type = (BIOSMemoryMapType)Multiboot.GetMemoryMapType(i);
switch (type)
{
case BIOSMemoryMapType.Usable:
memType = BootInfoMemoryType.SystemUsable;
break;
case BIOSMemoryMapType.Reserved:
memType = BootInfoMemoryType.Reserved;
break;
case BIOSMemoryMapType.ACPI_Relaimable:
memType = BootInfoMemoryType.ACPI_Relaimable;
break;
case BIOSMemoryMapType.ACPI_NVS_Memory:
memType = BootInfoMemoryType.ACPI_NVS_Memory;
break;
case BIOSMemoryMapType.BadMemory:
memType = BootInfoMemoryType.BadMemory;
break;
default:
memType = BootInfoMemoryType.Unknown;
break;
}
BootInfo->MemoryMapArray[i].Type = memType;
}
var idx = mbMapCount + 0;
BootInfo->MemoryMapArray[idx].Start = Address.OriginalKernelElfSection;
BootInfo->MemoryMapArray[idx].Size = KMath.AlignValueCeil(LoaderStart.OriginalKernelElf.TotalFileSize, 0x1000);
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.OriginalKernelElfImage;
idx++;
BootInfo->MemoryMapArray[idx].Start = Address.KernelElfSection;
BootInfo->MemoryMapArray[idx].Size = KMath.AlignValueCeil(LoaderStart.OriginalKernelElf.TotalFileSize, 0x1000);
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelElf;
idx++;
BootInfo->MemoryMapArray[idx].Start = Address.KernelBootInfo;
BootInfo->MemoryMapArray[idx].Size = 0x1000;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.BootInfoHeader;
idx++;
BootInfo->MemoryMapArray[idx].Start = BootInfo->HeapStart;
BootInfo->MemoryMapArray[idx].Size = 0x1000; //TODO: Recaluclate after Setup all Infos
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.BootInfoHeap;
idx++;
uint stackSize = 0x100000; // 1MB
BootInfo->MemoryMapArray[idx].Start = Address.InitialStack - stackSize;
BootInfo->MemoryMapArray[idx].Size = stackSize;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.InitialStack;
idx++;
BootInfo->MemoryMapArray[idx].Start = Address.GCInitialMemory;
BootInfo->MemoryMapArray[idx].Size = Address.GCInitialMemorySize;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.InitialGCMemory;
idx++;
BootInfo->MemoryMapArray[idx].Start = 0x0;
BootInfo->MemoryMapArray[idx].Size = 0xA0000; // 640 KB
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelReserved;
}
private static void SetupMemoryMap()
{
var mbMapCount = Multiboot.MemoryMapCount;
BootInfo->MemoryMapArray = (BootInfoMemory *)MallocBootInfoData((USize)(sizeof(MultiBootMemoryMap) * MemoryMapReserve));
for (uint i = 0; i < mbMapCount; i++)
{
BootInfo->MemoryMapArray[i].Start = Multiboot.GetMemoryMapBase(i);
BootInfo->MemoryMapArray[i].Size = Multiboot.GetMemoryMapLength(i);
var memType = BootInfoMemoryType.Reserved;
var type = (BIOSMemoryMapType)Multiboot.GetMemoryMapType(i);
var addressSpaceKind = AddressSpaceKind.Physical;
var preMap = false;
switch (type)
{
case BIOSMemoryMapType.Usable:
memType = BootInfoMemoryType.SystemUsable;
break;
case BIOSMemoryMapType.Reserved:
memType = BootInfoMemoryType.Reserved;
break;
case BIOSMemoryMapType.ACPI_Relaimable:
memType = BootInfoMemoryType.ACPI_Relaimable;
break;
case BIOSMemoryMapType.ACPI_NVS_Memory:
memType = BootInfoMemoryType.ACPI_NVS_Memory;
break;
case BIOSMemoryMapType.BadMemory:
memType = BootInfoMemoryType.BadMemory;
break;
default:
memType = BootInfoMemoryType.Unknown;
break;
}
BootInfo->MemoryMapArray[i].Type = memType;
BootInfo->MemoryMapArray[i].AddressSpaceKind = addressSpaceKind;
BootInfo->MemoryMapArray[i].PreMap = preMap;
}
// It's possible, that the BIOS-Area (@640K) is not correctly setup by Multiboot. So add it here manually to be sure
var idx = mbMapCount + 0;
BootInfo->MemoryMapArray[idx].Start = 640 * 1024;
BootInfo->MemoryMapArray[idx].Size = (1024 - 640) * 1024;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.CustomReserved;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Both; //TODO: Physical
BootInfo->MemoryMapArray[idx].PreMap = true;
idx++;
BootInfo->MemoryMapArray[idx].Start = Address.KernelElfSectionPhys;
BootInfo->MemoryMapArray[idx].Size = KMath.AlignValueCeil(LoaderStart.OriginalKernelElf.TotalFileSize, 0x1000);
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelElf;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Physical;
BootInfo->MemoryMapArray[idx].PreMap = true;
idx++;
BootInfo->MemoryMapArray[idx].Start = Address.KernelBootInfo;
BootInfo->MemoryMapArray[idx].Size = 0x1000;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.BootInfoHeader;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Both;
BootInfo->MemoryMapArray[idx].PreMap = true;
idx++;
BootInfo->MemoryMapArray[idx].Start = BootInfo->HeapStart;
BootInfo->MemoryMapArray[idx].Size = 0x1000; //TODO: Recalculate after Setup all Infos
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.BootInfoHeap;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Both;
BootInfo->MemoryMapArray[idx].PreMap = true;
idx++;
uint stackSize = 0x100000; // 1MB
BootInfo->MemoryMapArray[idx].Start = Address.InitialStack - stackSize;
BootInfo->MemoryMapArray[idx].Size = stackSize;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.InitialStack;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Both;
BootInfo->MemoryMapArray[idx].PreMap = true;
idx++;
BootInfo->MemoryMapArray[idx].Start = Address.GCInitialMemory;
BootInfo->MemoryMapArray[idx].Size = Address.GCInitialMemorySize;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.InitialGCMemory;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Both;
BootInfo->MemoryMapArray[idx].PreMap = true;
idx++;
BootInfo->MemoryMapArray[idx].Start = LoaderStart.OriginalKernelElf.GetSectionHeader(".bss")->Addr;
BootInfo->MemoryMapArray[idx].Size = LoaderStart.OriginalKernelElf.GetSectionHeader(".bss")->Size;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelBssSegment;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Virtual;
BootInfo->MemoryMapArray[idx].PreMap = false;
idx++;
BootInfo->MemoryMapArray[idx].Start = LoaderStart.OriginalKernelElf.GetSectionHeader(".text")->Addr;
BootInfo->MemoryMapArray[idx].Size = LoaderStart.OriginalKernelElf.GetSectionHeader(".text")->Size;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelTextSegment;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Virtual;
BootInfo->MemoryMapArray[idx].PreMap = false;
idx++;
BootInfo->MemoryMapArray[idx].Start = LoaderStart.OriginalKernelElf.GetSectionHeader(".rodata")->Addr;
BootInfo->MemoryMapArray[idx].Size = LoaderStart.OriginalKernelElf.GetSectionHeader(".rodata")->Size;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelROdataSegment;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Virtual;
BootInfo->MemoryMapArray[idx].PreMap = false;
idx++;
BootInfo->MemoryMapArray[idx].Start = LoaderStart.OriginalKernelElf.GetSectionHeader(".data")->Addr;
BootInfo->MemoryMapArray[idx].Size = LoaderStart.OriginalKernelElf.GetSectionHeader(".data")->Size;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelDataSegment;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Virtual;
BootInfo->MemoryMapArray[idx].PreMap = false;
// Avoiding the use of the first megabyte of RAM
idx++;
BootInfo->MemoryMapArray[idx].Start = 0x0;
BootInfo->MemoryMapArray[idx].Size = Address.ReserveMemory;
BootInfo->MemoryMapArray[idx].Type = BootInfoMemoryType.KernelReserved;
BootInfo->MemoryMapArray[idx].AddressSpaceKind = AddressSpaceKind.Both;
BootInfo->MemoryMapArray[idx].PreMap = false;
BootInfo->MemoryMapLength = idx + 1;
}
