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  *
   8  * PROGRAMMERS:     David Welch (welch@cwcom.net)
   9  */
  10
  11 /* INCLUDES ****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #define NDEBUG
  15 #include <internal/debug.h>
  16
  17 /* GLOBALS *****************************************************************/
  18
  19 /* FUNCTIONS ***************************************************************/
  20 NTSTATUS
  21 NTAPI
  22 MiZeroPage(PFN_TYPE Page)
  23 {
  24    PVOID TempAddress;
  25
  26    TempAddress = MmCreateHyperspaceMapping(Page);
  27    if (TempAddress == NULL)
  28    {
  29       return(STATUS_NO_MEMORY);
  30    }
  31    memset(TempAddress, 0, PAGE_SIZE);
  32    MmDeleteHyperspaceMapping(TempAddress);
  33    return(STATUS_SUCCESS);
  34 }
  35
  36 NTSTATUS
  37 NTAPI
  38 MiCopyFromUserPage(PFN_TYPE DestPage, PVOID SourceAddress)
  39 {
  40    PVOID TempAddress;
  41
  42    TempAddress = MmCreateHyperspaceMapping(DestPage);
  43    if (TempAddress == NULL)
  44    {
  45       return(STATUS_NO_MEMORY);
  46    }
  47    memcpy(TempAddress, SourceAddress, PAGE_SIZE);
  48    MmDeleteHyperspaceMapping(TempAddress);
  49    return(STATUS_SUCCESS);
  50 }
  51