[aandrejevic] 68001: [NTVDM] 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.

Author: aandrejevic
Date: Tue Jun  2 21:59:19 2015
New Revision: 68001

URL: http://svn.reactos.org/svn/reactos?rev=68001&view=rev
Log:
[NTVDM]
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.

Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
    trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.h

Modified: trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/dos/d...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c	[iso-8859-1] Tue Jun  2 21:59:19 2015
@@ -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 @@
             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());

Modified: trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/dos/d...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.h	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.h	[iso-8859-1] Tue Jun  2 21:59:19 2015
@@ -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
 {