- Do not change the mapping count of a page if the physical address falls

in the range of valid physical memory (in MmMapIoSpace and MmUnmapIoSpace).

svn path=/trunk/; revision=9445

reactos/ntoskrnl/include/internal/mm.h

@@ -669,9 +669,5 @@ VOID
 MmRawDeleteVirtualMapping(PVOID Address);
 VOID
 MiStopPagerThread(VOID);
-NTSTATUS 
-MmCreateVirtualMappingDump(PVOID Address, 
-			   ULONG flProtect,
-			   PHYSICAL_ADDRESS PhysicalAddress);
 
 #endif

reactos/ntoskrnl/mm/i386/page.c

@@ -16,7 +16,7 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
-/* $Id: page.c,v 1.65 2004/04/28 20:46:03 hbirr Exp $
+/* $Id: page.c,v 1.66 2004/05/20 08:37:21 hbirr Exp $
  *
  * PROJECT:     ReactOS kernel
  * FILE:        ntoskrnl/mm/i386/page.c
@@ -1003,7 +1003,7 @@ BOOLEAN MmIsPageSwapEntry(PEPROCESS Process, PVOID Address)
 }
 
 NTSTATUS
-MmCreateVirtualMappingDump(PVOID Address,
+MmCreateVirtualMappingForKernel(PVOID Address,
                                 ULONG flProtect,
                                 PHYSICAL_ADDRESS PhysicalAddress)
 {
@@ -1013,7 +1013,7 @@ MmCreateVirtualMappingDump(PVOID Address,
 
    if (Address < (PVOID)KERNEL_BASE)
    {
-      DPRINT1("No process\n");
+      DPRINT1("MmCreateVirtualMappingForKernel is called for user space\n");
       KEBUGCHECK(0);
    }
 
@@ -1031,87 +1031,15 @@ MmCreateVirtualMappingDump(PVOID Address,
    {
       return(Status);
    }
-   if (PAGE_MASK((*Pte)) != 0 && !((*Pte) & PA_PRESENT))
-   {
-      KEBUGCHECK(0);
-   }
-   *Pte = (ULONG)(PhysicalAddress.QuadPart | Attributes);
-   FLUSH_TLB;
-   return(STATUS_SUCCESS);
-}
 
-
-NTSTATUS
-MmCreateVirtualMappingForKernel(PVOID Address,
-                                ULONG flProtect,
-                                PHYSICAL_ADDRESS PhysicalAddress)
-{
-   PEPROCESS CurrentProcess;
-   ULONG Attributes;
-   PULONG Pte;
-   NTSTATUS Status;
-   PEPROCESS Process = NULL;
-
-   if (Process != NULL)
-   {
-      CurrentProcess = PsGetCurrentProcess();
-   }
-   else
-   {
-      CurrentProcess = NULL;
-   }
-
-   if (Process == NULL && Address < (PVOID)KERNEL_BASE)
-   {
-      DPRINT1("No process\n");
-      KEBUGCHECK(0);
-   }
-   if (Process != NULL && Address >= (PVOID)KERNEL_BASE)
-   {
-      DPRINT1("Setting kernel address with process context\n");
-      KEBUGCHECK(0);
-   }
-   Attributes = ProtectToPTE(flProtect);
-
-   if (Process != NULL && Process != CurrentProcess)
-   {
-      KeAttachProcess(Process);
-   }
-
-   Status = MmGetPageEntry2(Address, &Pte, FALSE);
-   if (!NT_SUCCESS(Status))
-   {
-      if (Process != NULL && Process != CurrentProcess)
-      {
-         KeDetachProcess();
-      }
-      return(Status);
-   }
-   if (PAGE_MASK((*Pte)) != 0 && !((*Pte) & PA_PRESENT))
-   {
-      KEBUGCHECK(0);
-   }
    if (PAGE_MASK((*Pte)) != 0)
    {
-      MmMarkPageUnmapped(PTE_TO_PAGE((*Pte)));
+      KEBUGCHECK(0);
    }
+   
    *Pte = (ULONG)(PhysicalAddress.QuadPart | Attributes);
-   if (Process != NULL &&
-         Process->AddressSpace.PageTableRefCountTable != NULL &&
-         Address < (PVOID)KERNEL_BASE &&
-         Attributes & PA_PRESENT)
-   {
-      PUSHORT Ptrc;
-
-      Ptrc = Process->AddressSpace.PageTableRefCountTable;
-
-      Ptrc[ADDR_TO_PAGE_TABLE(Address)]++;
-   }
    FLUSH_TLB;
-   if (Process != NULL && Process != CurrentProcess)
+
-   {
-      KeDetachProcess();
-   }
    return(STATUS_SUCCESS);
 }
 

reactos/ntoskrnl/mm/iospace.c

@@ -16,7 +16,7 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
-/* $Id: iospace.c,v 1.27 2004/05/15 22:45:49 hbirr Exp $
+/* $Id: iospace.c,v 1.28 2004/05/20 08:37:20 hbirr Exp $
  *
  * PROJECT:         ReactOS kernel
  * FILE:            ntoskrnl/mm/iospace.c
@@ -126,7 +126,6 @@ MmMapIoSpace (IN PHYSICAL_ADDRESS PhysicalAddress,
          DbgPrint("Unable to create virtual mapping\n");
          KEBUGCHECK(0);
       }
-      MmMarkPageMapped(PhysicalAddress);
    }
    return ((PVOID)((char*)Result + Offset));
 }

reactos/ntoskrnl/mm/marea.c

@@ -395,6 +395,12 @@ MmFreeMemoryArea(PMADDRESS_SPACE AddressSpace,
       PHYSICAL_ADDRESS PhysAddr = { 0 };
 #endif
 
+      if (MemoryArea->Type == MEMORY_AREA_IO_MAPPING)
+      {
+         MmRawDeleteVirtualMapping((char*)MemoryArea->BaseAddress + (i * PAGE_SIZE));
+      }
+      else
+      {
 	 BOOL Dirty = FALSE;
          SWAPENTRY SwapEntry = 0;
 
@@ -419,6 +425,7 @@ MmFreeMemoryArea(PMADDRESS_SPACE AddressSpace,
                      SwapEntry, (BOOLEAN)Dirty);
          }
       }
+   }
    if (AddressSpace->Process != NULL &&
          AddressSpace->Process != CurrentProcess)
    {

reactos/ntoskrnl/mm/pagefile.c

@@ -16,7 +16,7 @@
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
-/* $Id: pagefile.c,v 1.44 2004/04/22 01:57:49 jimtabor Exp $
+/* $Id: pagefile.c,v 1.45 2004/05/20 08:37:20 hbirr Exp $
  *
  * PROJECT:         ReactOS kernel
  * FILE:            ntoskrnl/mm/pagefile.c
@@ -587,7 +587,7 @@ MmDumpToPagingFile(ULONG BugCode,
          LARGE_INTEGER PhysicalAddress;
          PhysicalAddress.QuadPart = i * PAGE_SIZE;
          MdlMap[0] = i * PAGE_SIZE;
-         MmCreateVirtualMappingDump(MmCoreDumpPageFrame,
+         MmCreateVirtualMappingForKernel(MmCoreDumpPageFrame, 
 	                                 PAGE_READWRITE,
                                          PhysicalAddress);
 #if defined(__GNUC__)
@@ -604,6 +604,7 @@ MmDumpToPagingFile(ULONG BugCode,
 #endif
          DiskOffset.QuadPart += MmCoreDumpLcnMapping.LcnDiskOffset.QuadPart;
          Status = MmCoreDumpFunctions->DumpWrite(DiskOffset, Mdl);
+	 MmRawDeleteVirtualMapping(MmCoreDumpPageFrame);
          if (!NT_SUCCESS(Status))
          {
             DPRINT1("MM: Failed to write page to core dump.\n");