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 MiZeroPage(PFN_TYPE Page)
  22 {
  23    PVOID TempAddress;
  24
  25    TempAddress = MmCreateHyperspaceMapping(Page);
  26    if (TempAddress == NULL)
  27    {
  28       return(STATUS_NO_MEMORY);
  29    }
  30    memset(TempAddress, 0, PAGE_SIZE);
  31    MmDeleteHyperspaceMapping(TempAddress);
  32    return(STATUS_SUCCESS);
  33 }
  34
  35 NTSTATUS
  36 MiCopyFromUserPage(PFN_TYPE DestPage, PVOID SourceAddress)
  37 {
  38    PVOID TempAddress;
  39
  40    TempAddress = MmCreateHyperspaceMapping(DestPage);
  41    if (TempAddress == NULL)
  42    {
  43       return(STATUS_NO_MEMORY);
  44    }
  45    memcpy(TempAddress, SourceAddress, PAGE_SIZE);
  46    MmDeleteHyperspaceMapping(TempAddress);
  47    return(STATUS_SUCCESS);
  48 }
  49