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51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/kmap.c
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* PURPOSE: Implements the kernel memory pool
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*
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* PROGRAMMERS: David Welch (welch@cwcom.net)
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*/
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/* INCLUDES ****************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <internal/debug.h>
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/* GLOBALS *****************************************************************/
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/* FUNCTIONS ***************************************************************/
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NTSTATUS
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NTAPI
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MiZeroPage(PFN_TYPE Page)
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{
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PVOID TempAddress;
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TempAddress = MmCreateHyperspaceMapping(Page);
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if (TempAddress == NULL)
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{
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return(STATUS_NO_MEMORY);
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}
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memset(TempAddress, 0, PAGE_SIZE);
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MmDeleteHyperspaceMapping(TempAddress);
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return(STATUS_SUCCESS);
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}
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NTSTATUS
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NTAPI
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MiCopyFromUserPage(PFN_TYPE DestPage, PVOID SourceAddress)
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{
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PVOID TempAddress;
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TempAddress = MmCreateHyperspaceMapping(DestPage);
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if (TempAddress == NULL)
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{
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return(STATUS_NO_MEMORY);
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}
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memcpy(TempAddress, SourceAddress, PAGE_SIZE);
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MmDeleteHyperspaceMapping(TempAddress);
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return(STATUS_SUCCESS);
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}
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