reactos/ntoskrnl/mm/kmap.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:    See COPYING in the top level directory
   4  * PROJECT:      ReactOS kernel
   5  * FILE:         ntoskrnl/mm/kmap.c
   6  * PURPOSE:      Implements the kernel memory pool
   7  * PROGRAMMER:   David Welch (welch@cwcom.net)
   8  */
   9
  10 /* INCLUDES ****************************************************************/
  11
  12 #include <ntoskrnl.h>
  13 #define NDEBUG
  14 #include <internal/debug.h>
  15
  16 /* GLOBALS *****************************************************************/
  17
  18 /* FUNCTIONS ***************************************************************/
  19 NTSTATUS
  20 MiZeroPage(PFN_TYPE Page)
  21 {
  22    PVOID TempAddress;
  23
  24    TempAddress = MmCreateHyperspaceMapping(Page);
  25    if (TempAddress == NULL)
  26    {
  27       return(STATUS_NO_MEMORY);
  28    }
  29    memset(TempAddress, 0, PAGE_SIZE);
  30    MmDeleteHyperspaceMapping(TempAddress);
  31    return(STATUS_SUCCESS);
  32 }
  33
  34 NTSTATUS
  35 MiCopyFromUserPage(PFN_TYPE DestPage, PVOID SourceAddress)
  36 {
  37    PVOID TempAddress;
  38
  39    TempAddress = MmCreateHyperspaceMapping(DestPage);
  40    if (TempAddress == NULL)
  41    {
  42       return(STATUS_NO_MEMORY);
  43    }
  44    memcpy(TempAddress, SourceAddress, PAGE_SIZE);
  45    MmDeleteHyperspaceMapping(TempAddress);
  46    return(STATUS_SUCCESS);
  47 }
  48