public void Setup(MemoryRegion region, AddressSpaceKind addrKind)
{
TraceOptions = new PageFrameAllocatorTraceOptions();
_AddressSpaceKind = addrKind;
_Region = region;
FistPageNum = region.Start / PageSize;
_TotalPages = region.Size / PageSize;
kmap = AllocRawMemory(_TotalPages * (uint)sizeof(Page));
PageArray = (Page *)kmap.Start;
var firstSelfPageNum = KMath.DivFloor(kmap.Start, 4096);
var selfPages = KMath.DivFloor(kmap.Size, 4096);
KernelMessage.WriteLine("Page Frame Array allocated {0} pages, beginning with page {1} at {2:X8}", selfPages, firstSelfPageNum, (uint)PageArray);
PageTable.KernelTable.SetWritable(kmap.Start, kmap.Size);
kmap.Clear();
var addr = FistPageNum * 4096;
for (uint i = 0; i < _TotalPages; i++)
{
//KernelMessage.WriteLine(i);
PageArray[i].Address = addr;
//if (i != 0)
// PageArray[i - 1].Next = &PageArray[i];
addr += 4096;
}
KernelMessage.WriteLine("Setup free memory");
SetupFreeMemory();
KernelMessage.WriteLine("Build linked lists");
BuildLinkedLists();
KernelMessage.WriteLine("Build linked lists done");
_FreePages = 0;
for (uint i = 0; i < _TotalPages; i++)
{
if (PageArray[i].Status == PageStatus.Free)
{
_FreePages++;
}
}
//Assert.True(list_head.list_count(FreeList) == _FreePages, "list_head.list_count(FreeList) == _FreePages");
var debugCheckCount = list_head.list_count(FreeList);
if (debugCheckCount != _FreePages)
{
KernelMessage.WriteLine("debugCheckCount {0} != {1}", debugCheckCount, _FreePages);
Debug.Break();
}
KernelMessage.Path(DebugName, "Pages Free: {0}", FreePages);
}
public void Setup(MemoryRegion region, AddressSpaceKind addrKind)
{
_Requests = 0;
_Releases = 0;
_AddressSpaceKind = addrKind;
_Region = region;
FistPageNum = region.Start / PageSize;
_TotalPages = region.Size / PageSize;
kmap = AllocRawMemory(_TotalPages * (uint)sizeof(Page));
PageArray = (Page *)kmap.Start;
NextTryPage = PageArray;
var firstSelfPageNum = KMath.DivFloor(kmap.Start, 4096);
var selfPages = KMath.DivFloor(kmap.Size, 4096);
KernelMessage.WriteLine("Page Frame Array allocated {0} pages, beginning with page {1}", selfPages, firstSelfPageNum);
PageTableExtensions.SetWritable(PageTable.KernelTable, kmap.Start, kmap.Size);
kmap.Clear();
var addr = FistPageNum * 4096;
for (uint i = 0; i < _TotalPages; i++)
{
PageArray[i].Address = addr;
//if (i != 0)
// PageArray[i - 1].Next = &PageArray[i];
addr += 4096;
}
SetupFreeMemory();
_FreePages = 0;
for (uint i = 0; i < _TotalPages; i++)
{
if (PageArray[i].Status == PageStatus.Free)
{
_FreePages++;
}
}
KernelMessage.WriteLine("Pages Free: {0}", FreePages);
}
private void SetInitialPageStatus(KernelMemoryMapArray *maps, PageStatus status)
{
for (var i = 0; i < maps->Count; i++)
{
var map = maps->Items[i];
if (map.Start >= BootInfo.Header->InstalledPhysicalMemory)
{
continue;
}
if ((map.AddressSpaceKind & AddressSpaceKind.Physical) == 0)
{
continue;
}
var mapPages = KMath.DivCeil(map.Size, 4096);
var fistPageNum = KMath.DivFloor(map.Start, 4096);
KernelMessage.WriteLine("Mark Pages from {0:X8}, Size {1:X8}, Type {2}, FirstPage {3}, Pages {4}, Status {5}", map.Start, map.Size, (uint)map.Type, (uint)fistPageNum, mapPages, (uint)status);
for (var p = fistPageNum; p < fistPageNum + mapPages; p++)
{
var addr = p * 4096;
if (!Region.Contains(addr))
{
continue;
}
if (addr >= BootInfo.Header->InstalledPhysicalMemory)
{
KernelMessage.WriteLine("addr >= BootInfo.Header->InstalledPhysicalMemory");
break;
}
var page = GetPageByNum(p);
Assert.IsSet(page, "page == null");
page->Status = status;
}
}
}
