reactos/ntoskrnl/io
diff -u -r1.14 -r1.15
--- mdl.c 20 Apr 2004 19:01:47 -0000 1.14
+++ mdl.c 15 May 2004 22:51:38 -0000 1.15
@@ -1,4 +1,4 @@
-/* $Id: mdl.c,v 1.14 2004/04/20 19:01:47 gdalsnes Exp $
+/* $Id: mdl.c,v 1.15 2004/05/15 22:51:38 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@@ -14,6 +14,7 @@
#include <ddk/ntddk.h>
#include <internal/pool.h>
+#define NDEBUG
#include <internal/debug.h>
/* GLOBALS *******************************************************************/
@@ -92,16 +93,31 @@
{
PULONG TargetPages = (PULONG)(TargetMdl + 1);
PULONG SourcePages = (PULONG)(SourceMdl + 1);
- ULONG Va;
- ULONG Delta = (PAGE_ROUND_DOWN(VirtualAddress) - (ULONG)SourceMdl->StartVa)/
- PAGE_SIZE;
+ ULONG Count;
+ ULONG Delta;
- for (Va = 0; Va < (PAGE_ROUND_UP(Length)/PAGE_SIZE); Va++)
- {
- TargetPages[Va] = SourcePages[Va+Delta];
- }
-
+ DPRINT("VirtualAddress %x, SourceMdl->StartVa %x, SourceMdl->MappedSystemVa %x\n",
+ VirtualAddress, SourceMdl->StartVa, SourceMdl->MappedSystemVa);
+
+ TargetMdl->StartVa = (PVOID)PAGE_ROUND_DOWN(VirtualAddress);
+ TargetMdl->ByteOffset = (ULONG_PTR)VirtualAddress - (ULONG_PTR)TargetMdl->StartVa;
+ TargetMdl->ByteCount = Length;
+ TargetMdl->Process = SourceMdl->Process;
+ Delta = (ULONG_PTR)VirtualAddress - ((ULONG_PTR)SourceMdl->StartVa + SourceMdl->ByteOffset);
+ TargetMdl->MappedSystemVa = SourceMdl->MappedSystemVa + Delta;
+
+ TargetMdl->MdlFlags = SourceMdl->MdlFlags & (MDL_IO_PAGE_READ|MDL_SOURCE_IS_NONPAGED_POOL|MDL_MAPPED_TO_SYSTEM_VA);
TargetMdl->MdlFlags |= MDL_PARTIAL;
+
+ Delta = ((ULONG_PTR)TargetMdl->StartVa - (ULONG_PTR)SourceMdl->StartVa) / PAGE_SIZE;
+ Count = ADDRESS_AND_SIZE_TO_SPAN_PAGES(VirtualAddress,Length);
+
+ SourcePages += Delta;
+
+ DPRINT("Delta %d, Count %d\n", Delta, Count);
+
+ memcpy(TargetPages, SourcePages, Count * sizeof(ULONG));
+
}
/*