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[NTVDM]

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Implement XMS functions 10h, 11h and 12h by forwarding them to the
VDM DOS memory manager.
CORE-9651 CORE-9741 #resolve #comment Fixed in revision 68001.


svn path=/trunk/; revision=68001
This commit is contained in:
Aleksandar Andrejevic 2015-06-02 21:59:19 +00:00
parent 132e058f65
commit 3c167d248f
2 changed files with 72 additions and 0 deletions
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69
reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
View file

@ -20,6 +20,7 @@
#include "dos/dem.h"
#include "device.h"
#include "himem.h"
#include "memory.h"
#define XMS_DEVICE_NAME "XMSXXXX0"
@ -564,6 +565,74 @@ static VOID WINAPI XmsBopProcedure(LPWORD Stack)
break;
}
/* Allocate UMB */
case 0x10:
{
WORD Segment;
WORD MaxAvailable;
BYTE OldAllocStrategy = Sda->AllocStrategy;
BOOLEAN OldLinkState = DosUmbLinked;
DosLinkUmb();
Sda->AllocStrategy = DOS_ALLOC_HIGH | DOS_ALLOC_BEST_FIT;
Segment = DosAllocateMemory(getDX(), &MaxAvailable);
if (Segment)
{
setAX(1);
setBX(Segment);
}
else
{
setAX(0);
setBL(MaxAvailable ? XMS_STATUS_SMALLER_UMB : XMS_STATUS_OUT_OF_UMBS);
setDX(MaxAvailable);
}
Sda->AllocStrategy = OldAllocStrategy;
if (!OldLinkState) DosUnlinkUmb();
break;
}
/* Free UMB */
case 0x11:
{
if (DosFreeMemory(getDX()))
{
setAX(1);
}
else
{
setAX(0);
setBL(XMS_STATUS_INVALID_UMB);
}
break;
}
/* Reallocate UMB */
case 0x12:
{
WORD Segment;
WORD MaxAvailable;
Segment = DosResizeMemory(getDX(), getBX(), &MaxAvailable);
if (Segment)
{
setAX(1);
}
else
{
setAX(0);
setBL(Sda->LastErrorCode == ERROR_INVALID_HANDLE
? XMS_STATUS_INVALID_UMB : XMS_STATUS_SMALLER_UMB);
setDX(MaxAvailable);
}
break;
}
default:
{
DPRINT1("XMS command AH = 0x%02X NOT IMPLEMENTED\n", getAH());

3
reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.h
View file

@ -28,6 +28,9 @@
#define XMS_STATUS_LOCKED 0xAB
#define XMS_STATUS_LOCK_OVERFLOW 0xAC
#define XMS_STATUS_CANNOT_LOCK 0xAD
#define XMS_STATUS_SMALLER_UMB 0xB0
#define XMS_STATUS_OUT_OF_UMBS 0xB1
#define XMS_STATUS_INVALID_UMB 0xB2
typedef struct _XMS_HANDLE
{