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