168 lines
3.1 KiB
C
168 lines
3.1 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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xmscmt86.c
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Abstract:
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This module conains the memory commit/decommit/move routines
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for risc.
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Author:
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Dave Hastings (daveh) creation-date 25-Jan-1994
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Revision History:
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--*/
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#include <xms.h>
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#include <suballoc.h>
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#include <softpc.h>
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NTSTATUS
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xmsCommitBlock(
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ULONG BaseAddress,
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ULONG Size
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)
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/*++
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Routine Description:
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This routine commits a block of memory using sas_manage_xms.
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Arguments:
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BaseAddress -- Supplies the base address to commit memory at
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Size -- Supplies the size of the block to commit
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Return Value:
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0 if successfull
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--*/
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{
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BOOL Status;
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//
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// Perform the allocation
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//
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Status = sas_manage_xms(
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(PVOID)BaseAddress,
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Size,
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1
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);
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//
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// We elected to have 0 indicate success, because that allows
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// us to directly pass back NTSTATUS codes. On x86 we use
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// NT memory management to do the commit for us, and the returned
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// status code contains more information than just success or failure
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//
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if (Status) {
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return STATUS_SUCCESS;
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} else {
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return -1;
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}
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}
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NTSTATUS
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xmsDecommitBlock(
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ULONG BaseAddress,
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ULONG Size
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)
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/*++
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Routine Description:
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This routine commits a block of memory using sas_manage_xms.
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Arguments:
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BaseAddress -- Supplies the base address to decommit memory at
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Size -- Supplies the size of the block to decommit
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Return Value:
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0 if successful
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--*/
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{
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BOOL Status;
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//
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// Perform the allocation
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//
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Status = sas_manage_xms(
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(PVOID)BaseAddress,
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Size,
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2
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);
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//
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// We elected to have 0 indicate success, because that allows
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// us to directly pass back NTSTATUS codes. On x86 we use
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// NT memory management to do the commit for us, and the returned
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// status code contains more information than just success or failure
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//
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if (Status) {
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return STATUS_SUCCESS;
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} else {
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return -1;
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}
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}
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VOID
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xmsMoveMemory(
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ULONG Destination,
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ULONG Source,
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ULONG Count
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)
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/*++
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Routine Description:
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This routine moves a block of memory, and notifies the emulator.
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It correctly handles overlapping source and destination
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Arguments:
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Destination -- Supplies a pointer to the destination Intel (NOT Linear)
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Address
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Source -- Supplies a pointer to the source Intel Address
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Count -- Supplies the number of bytes to move
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Return Value:
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None.
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--*/
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{
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ULONG SoftpcBase;
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//
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// Get the linear address of the beginning of Intel memory
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//
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SoftpcBase = (ULONG) GetVDMAddr(0,0);
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//
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// Move the memory
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//
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RtlMoveMemory(
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(PVOID)((ULONG)Destination + SoftpcBase),
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(PVOID)((ULONG)Source + SoftpcBase),
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Count
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);
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// WARNING!!!! Donot use Sim32FlushVDMPoiner unless you know the exact segment
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// address. In this case, we have no idea what the segment value is, all we
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// know is its "linear address".
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sas_overwrite_memory((PBYTE)Destination, Count);
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}
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