ReactOS  0.4.15-dev-2979-gfd8baca
Classes | Macros | Typedefs | Functions
emsdrv.h File Reference
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Classes

struct  _EMS_HANDLE
 
struct  _EMS_PAGE
 
struct  _EMS_HANDLE_PAGE_INFO
 
struct  _EMS_HANDLE_DIR_ENTRY
 
struct  _EMS_COPY_DATA
 
struct  _EMS_MAPPABLE_PHYS_PAGE
 
struct  _EMS_HARDWARE_INFO
 

Macros

#define EMS_VERSION_NUM   0x40
 
#define EMS_INTERRUPT_NUM   0x67
 
#define EMS_SEGMENT   0xD000
 
#define EMS_MAX_HANDLES   255
 
#define EMS_PAGE_BITS   14
 
#define EMS_PAGE_SIZE   (1 << EMS_PAGE_BITS)
 
#define EMS_PHYSICAL_PAGES   4
 
#define EMS_TOTAL_PAGES   1024
 
#define EMS_STATUS_SUCCESS   0x00
 
#define EMS_STATUS_INTERNAL_ERROR   0x80
 
#define EMS_STATUS_INVALID_HANDLE   0x83
 
#define EMS_STATUS_UNKNOWN_FUNCTION   0x84
 
#define EMS_STATUS_NO_MORE_HANDLES   0x85
 
#define EMS_STATUS_INSUFFICIENT_PAGES   0x88
 
#define EMS_STATUS_ZERO_PAGES   0x89
 
#define EMS_STATUS_INV_LOGICAL_PAGE   0x8A
 
#define EMS_STATUS_INV_PHYSICAL_PAGE   0x8B
 
#define EMS_STATUS_INVALID_SUBFUNCTION   0x8F
 
#define EMS_STATUS_HANDLE_NOT_FOUND   0xA0
 
#define EMS_STATUS_UNNAMED_HANDLE   0xA1
 
#define EMS_STATUS_HANDLE_ALREADY_EXISTS   0xA1
 

Typedefs

typedef struct _EMS_HANDLE EMS_HANDLE
 
typedef struct _EMS_HANDLE * PEMS_HANDLE
 
typedef struct _EMS_PAGE EMS_PAGE
 
typedef struct _EMS_PAGE * PEMS_PAGE
 
typedef struct _EMS_HANDLE_PAGE_INFO EMS_HANDLE_PAGE_INFO
 
typedef struct _EMS_HANDLE_PAGE_INFO * PEMS_HANDLE_PAGE_INFO
 
typedef struct _EMS_HANDLE_DIR_ENTRY EMS_HANDLE_DIR_ENTRY
 
typedef struct _EMS_HANDLE_DIR_ENTRY * PEMS_HANDLE_DIR_ENTRY
 
typedef struct _EMS_COPY_DATA EMS_COPY_DATA
 
typedef struct _EMS_COPY_DATA * PEMS_COPY_DATA
 
typedef struct _EMS_MAPPABLE_PHYS_PAGE EMS_MAPPABLE_PHYS_PAGE
 
typedef struct _EMS_MAPPABLE_PHYS_PAGE * PEMS_MAPPABLE_PHYS_PAGE
 
typedef struct _EMS_HARDWARE_INFO EMS_HARDWARE_INFO
 
typedef struct _EMS_HARDWARE_INFO * PEMS_HARDWARE_INFO
 

Functions

BOOLEAN EmsDrvInitialize (USHORT Segment, ULONG TotalPages)
 
VOID EmsDrvCleanup (VOID)
 

Macro Definition Documentation

◆ EMS_INTERRUPT_NUM

#define EMS_INTERRUPT_NUM   0x67

Definition at line 15 of file emsdrv.h.

◆ EMS_MAX_HANDLES

#define EMS_MAX_HANDLES   255

Definition at line 18 of file emsdrv.h.

◆ EMS_PAGE_BITS

#define EMS_PAGE_BITS   14

Definition at line 19 of file emsdrv.h.

◆ EMS_PAGE_SIZE

#define EMS_PAGE_SIZE   (1 << EMS_PAGE_BITS)

Definition at line 20 of file emsdrv.h.

◆ EMS_PHYSICAL_PAGES

#define EMS_PHYSICAL_PAGES   4

Definition at line 21 of file emsdrv.h.

◆ EMS_SEGMENT

#define EMS_SEGMENT   0xD000

Definition at line 16 of file emsdrv.h.

◆ EMS_STATUS_HANDLE_ALREADY_EXISTS

#define EMS_STATUS_HANDLE_ALREADY_EXISTS   0xA1

Definition at line 38 of file emsdrv.h.

◆ EMS_STATUS_HANDLE_NOT_FOUND

#define EMS_STATUS_HANDLE_NOT_FOUND   0xA0

Definition at line 36 of file emsdrv.h.

◆ EMS_STATUS_INSUFFICIENT_PAGES

#define EMS_STATUS_INSUFFICIENT_PAGES   0x88

Definition at line 31 of file emsdrv.h.

◆ EMS_STATUS_INTERNAL_ERROR

#define EMS_STATUS_INTERNAL_ERROR   0x80

Definition at line 27 of file emsdrv.h.

◆ EMS_STATUS_INV_LOGICAL_PAGE

#define EMS_STATUS_INV_LOGICAL_PAGE   0x8A

Definition at line 33 of file emsdrv.h.

◆ EMS_STATUS_INV_PHYSICAL_PAGE

#define EMS_STATUS_INV_PHYSICAL_PAGE   0x8B

Definition at line 34 of file emsdrv.h.

◆ EMS_STATUS_INVALID_HANDLE

#define EMS_STATUS_INVALID_HANDLE   0x83

Definition at line 28 of file emsdrv.h.

◆ EMS_STATUS_INVALID_SUBFUNCTION

#define EMS_STATUS_INVALID_SUBFUNCTION   0x8F

Definition at line 35 of file emsdrv.h.

◆ EMS_STATUS_NO_MORE_HANDLES

#define EMS_STATUS_NO_MORE_HANDLES   0x85

Definition at line 30 of file emsdrv.h.

◆ EMS_STATUS_SUCCESS

#define EMS_STATUS_SUCCESS   0x00

Definition at line 26 of file emsdrv.h.

◆ EMS_STATUS_UNKNOWN_FUNCTION

#define EMS_STATUS_UNKNOWN_FUNCTION   0x84

Definition at line 29 of file emsdrv.h.

◆ EMS_STATUS_UNNAMED_HANDLE

#define EMS_STATUS_UNNAMED_HANDLE   0xA1

Definition at line 37 of file emsdrv.h.

◆ EMS_STATUS_ZERO_PAGES

#define EMS_STATUS_ZERO_PAGES   0x89

Definition at line 32 of file emsdrv.h.

◆ EMS_TOTAL_PAGES

#define EMS_TOTAL_PAGES   1024

Definition at line 24 of file emsdrv.h.

◆ EMS_VERSION_NUM

#define EMS_VERSION_NUM   0x40

Definition at line 14 of file emsdrv.h.

Typedef Documentation

◆ EMS_COPY_DATA

typedef struct _EMS_COPY_DATA EMS_COPY_DATA

◆ EMS_HANDLE

typedef struct _EMS_HANDLE EMS_HANDLE

◆ EMS_HANDLE_DIR_ENTRY

typedef struct _EMS_HANDLE_DIR_ENTRY EMS_HANDLE_DIR_ENTRY

◆ EMS_HANDLE_PAGE_INFO

typedef struct _EMS_HANDLE_PAGE_INFO EMS_HANDLE_PAGE_INFO

◆ EMS_HARDWARE_INFO

typedef struct _EMS_HARDWARE_INFO EMS_HARDWARE_INFO

◆ EMS_MAPPABLE_PHYS_PAGE

typedef struct _EMS_MAPPABLE_PHYS_PAGE EMS_MAPPABLE_PHYS_PAGE

◆ EMS_PAGE

typedef struct _EMS_PAGE EMS_PAGE

◆ PEMS_COPY_DATA

typedef struct _EMS_COPY_DATA * PEMS_COPY_DATA

◆ PEMS_HANDLE

typedef struct _EMS_HANDLE * PEMS_HANDLE

◆ PEMS_HANDLE_DIR_ENTRY

typedef struct _EMS_HANDLE_DIR_ENTRY * PEMS_HANDLE_DIR_ENTRY

◆ PEMS_HANDLE_PAGE_INFO

typedef struct _EMS_HANDLE_PAGE_INFO * PEMS_HANDLE_PAGE_INFO

◆ PEMS_HARDWARE_INFO

typedef struct _EMS_HARDWARE_INFO * PEMS_HARDWARE_INFO

◆ PEMS_MAPPABLE_PHYS_PAGE

typedef struct _EMS_MAPPABLE_PHYS_PAGE * PEMS_MAPPABLE_PHYS_PAGE

◆ PEMS_PAGE

typedef struct _EMS_PAGE * PEMS_PAGE

Function Documentation

◆ EmsDrvCleanup()

VOID EmsDrvCleanup ( VOID  )

Definition at line 850 of file emsdrv.c.

851 {
852  /* Delete the device */
853  DosDeleteDevice(Node);
854 
855  MemRemoveFastMemoryHook(UlongToPtr(TO_LINEAR(EmsSegment, 0)),
856  EMS_PHYSICAL_PAGES * EMS_PAGE_SIZE);
857 
858  if (EmsMemory)
859  {
860  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsMemory);
861  EmsMemory = NULL;
862  }
863 
864  if (EmsPageTable)
865  {
866  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsPageTable);
867  EmsPageTable = NULL;
868  }
869 
870  if (EmsBitmapBuffer)
871  {
872  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsBitmapBuffer);
873  EmsBitmapBuffer = NULL;
874  }
875 
876  UmaDescRelease(EmsSegment);
877 }
EmsSegment
static USHORT EmsSegment
Definition: emsdrv.c:45
RtlFreeHeap
BOOLEAN NTAPI RtlFreeHeap(IN PVOID HeapHandle, IN ULONG Flags, IN PVOID HeapBase)
Definition: heap.c:606
MemRemoveFastMemoryHook
BOOL MemRemoveFastMemoryHook(PVOID Address, ULONG Size)
Definition: memory.c:350
EMS_PHYSICAL_PAGES
#define EMS_PHYSICAL_PAGES
Definition: emsdrv.h:21
EmsPageTable
static PEMS_PAGE EmsPageTable
Definition: emsdrv.c:39
DosDeleteDevice
VOID DosDeleteDevice(PDOS_DEVICE_NODE DeviceNode)
Definition: device.c:419
UlongToPtr
#define UlongToPtr(u)
Definition: config.h:106
UmaDescRelease
BOOLEAN UmaDescRelease(IN USHORT Segment)
Definition: umamgr.c:207
EmsBitmapBuffer
static PULONG EmsBitmapBuffer
Definition: emsdrv.c:38
TO_LINEAR
#define TO_LINEAR(seg, off)
Definition: emulator.h:22
EMS_PAGE_SIZE
#define EMS_PAGE_SIZE
Definition: emsdrv.h:20
NULL
#define NULL
Definition: types.h:112
EmsMemory
static PVOID EmsMemory
Definition: emsdrv.c:44
node
Definition: dlist.c:348

◆ EmsDrvInitialize()

BOOLEAN EmsDrvInitialize ( USHORT  Segment,
ULONG  TotalPages 
)

Definition at line 767 of file emsdrv.c.

768 {
769  USHORT Size;
770 
771  /* Try to allocate our page table in UMA at the given segment */
772  EmsSegment = (Segment != 0 ? Segment : EMS_SEGMENT);
773  Size = EMS_SEGMENT_SIZE; // Size in paragraphs
774  if (!UmaDescReserve(&EmsSegment, &Size)) return FALSE;
775 
776  EmsTotalPages = TotalPages;
777  EmsBitmapBuffer = RtlAllocateHeap(RtlGetProcessHeap(),
778  HEAP_ZERO_MEMORY,
779  ((TotalPages + 31) / 32) * sizeof(ULONG));
780  if (EmsBitmapBuffer == NULL)
781  {
782  UmaDescRelease(EmsSegment);
783  return FALSE;
784  }
785 
786  RtlInitializeBitMap(&AllocBitmap, EmsBitmapBuffer, TotalPages);
787 
788  EmsPageTable = (PEMS_PAGE)RtlAllocateHeap(RtlGetProcessHeap(),
789  HEAP_ZERO_MEMORY,
790  TotalPages * sizeof(EMS_PAGE));
791  if (EmsPageTable == NULL)
792  {
793  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsBitmapBuffer);
794  EmsBitmapBuffer = NULL;
795 
796  UmaDescRelease(EmsSegment);
797  return FALSE;
798  }
799 
800  EmsMemory = (PVOID)RtlAllocateHeap(RtlGetProcessHeap(), 0, TotalPages * EMS_PAGE_SIZE);
801  if (EmsMemory == NULL)
802  {
803  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsPageTable);
804  EmsPageTable = NULL;
805  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsBitmapBuffer);
806  EmsBitmapBuffer = NULL;
807 
808  UmaDescRelease(EmsSegment);
809  return FALSE;
810  }
811 
812  InitHandlesTable();
813  /*
814  * FIXME: We should ensure that the system handle is associated
815  * with mapped pages from conventional memory. DosEmu seems to do
816  * it correctly. 384kB of memory mapped.
817  */
818  if (InitSystemHandle(384/16) != EMS_STATUS_SUCCESS)
819  {
820  DPRINT1("Impossible to allocate pages for the system handle!\n");
821 
822  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsMemory);
823  EmsMemory = NULL;
824  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsPageTable);
825  EmsPageTable = NULL;
826  RtlFreeHeap(RtlGetProcessHeap(), 0, EmsBitmapBuffer);
827  EmsBitmapBuffer = NULL;
828 
829  UmaDescRelease(EmsSegment);
830  return FALSE;
831  }
832 
833  MemInstallFastMemoryHook(UlongToPtr(TO_LINEAR(EmsSegment, 0)),
834  EMS_PHYSICAL_PAGES * EMS_PAGE_SIZE,
835  EmsReadMemory,
836  EmsWriteMemory);
837 
838  /* Create the device */
839  Node = DosCreateDeviceEx(DOS_DEVATTR_IOCTL | DOS_DEVATTR_CHARACTER,
840  EMS_DEVICE_NAME,
841  Int16To32StubSize);
842  Node->IoctlReadRoutine = EmsDrvDispatchIoctlRead;
843 
844  RegisterInt32(DEVICE_PRIVATE_AREA(Node->Driver),
845  EMS_INTERRUPT_NUM, EmsIntHandler, NULL);
846 
847  return TRUE;
848 }
UmaDescReserve
BOOLEAN UmaDescReserve(IN OUT PUSHORT Segment, IN OUT PUSHORT Size)
Definition: umamgr.c:84
EmsTotalPages
static ULONG EmsTotalPages
Definition: emsdrv.c:43
TRUE
#define TRUE
Definition: types.h:120
EmsSegment
static USHORT EmsSegment
Definition: emsdrv.c:45
AllocBitmap
static RTL_BITMAP AllocBitmap
Definition: emsdrv.c:37
RtlInitializeBitMap
NTSYSAPI void WINAPI RtlInitializeBitMap(PRTL_BITMAP, PULONG, ULONG)
DOS_DEVATTR_IOCTL
#define DOS_DEVATTR_IOCTL
Definition: device.h:28
RtlFreeHeap
BOOLEAN NTAPI RtlFreeHeap(IN PVOID HeapHandle, IN ULONG Flags, IN PVOID HeapBase)
Definition: heap.c:606
EMS_PHYSICAL_PAGES
#define EMS_PHYSICAL_PAGES
Definition: emsdrv.h:21
Size
IN PVOID IN PVOID IN USHORT IN USHORT Size
Definition: pci.h:361
EMS_SEGMENT
#define EMS_SEGMENT
Definition: emsdrv.h:16
EMS_DEVICE_NAME
#define EMS_DEVICE_NAME
Definition: emsdrv.c:29
EmsPageTable
static PEMS_PAGE EmsPageTable
Definition: emsdrv.c:39
InitSystemHandle
static UCHAR InitSystemHandle(USHORT NumPages)
Definition: emsdrv.c:169
PEMS_PAGE
struct _EMS_PAGE * PEMS_PAGE
EMS_INTERRUPT_NUM
#define EMS_INTERRUPT_NUM
Definition: emsdrv.h:15
FALSE
#define FALSE
Definition: types.h:117
EmsReadMemory
static VOID FASTCALL EmsReadMemory(ULONG Address, PVOID Buffer, ULONG Size)
Definition: emsdrv.c:716
EmsWriteMemory
static BOOLEAN FASTCALL EmsWriteMemory(ULONG Address, PVOID Buffer, ULONG Size)
Definition: emsdrv.c:736
EMS_STATUS_SUCCESS
#define EMS_STATUS_SUCCESS
Definition: emsdrv.h:26
RegisterInt32
ULONG RegisterInt32(IN ULONG FarPtr, IN BYTE IntNumber, IN EMULATOR_INT32_PROC IntHandler, OUT PSIZE_T CodeSize OPTIONAL)
Definition: int32.c:118
EMS_SEGMENT_SIZE
#define EMS_SEGMENT_SIZE
Definition: emsdrv.c:31
Int16To32StubSize
#define Int16To32StubSize
Definition: int32.h:38
PVOID
void * PVOID
Definition: retypes.h:9
UlongToPtr
#define UlongToPtr(u)
Definition: config.h:106
Segment
_Inout_ PVOID Segment
Definition: exfuncs.h:1101
RtlAllocateHeap
PVOID NTAPI RtlAllocateHeap(IN PVOID HeapHandle, IN ULONG Flags, IN SIZE_T Size)
Definition: heap.c:588
EmsDrvDispatchIoctlRead
static WORD NTAPI EmsDrvDispatchIoctlRead(PDOS_DEVICE_NODE Device, DWORD Buffer, PWORD Length)
Definition: emsdrv.c:758
DEVICE_PRIVATE_AREA
#define DEVICE_PRIVATE_AREA(Driver)
Definition: device.h:16
DosCreateDeviceEx
PDOS_DEVICE_NODE DosCreateDeviceEx(WORD Attributes, PCHAR DeviceName, WORD PrivateDataSize)
Definition: device.c:361
MemInstallFastMemoryHook
BOOL MemInstallFastMemoryHook(PVOID Address, ULONG Size, PMEMORY_READ_HANDLER ReadHandler, PMEMORY_WRITE_HANDLER WriteHandler)
Definition: memory.c:296
UmaDescRelease
BOOLEAN UmaDescRelease(IN USHORT Segment)
Definition: umamgr.c:207
EmsBitmapBuffer
static PULONG EmsBitmapBuffer
Definition: emsdrv.c:38
TO_LINEAR
#define TO_LINEAR(seg, off)
Definition: emulator.h:22
EMS_PAGE_SIZE
#define EMS_PAGE_SIZE
Definition: emsdrv.h:20
DOS_DEVATTR_CHARACTER
#define DOS_DEVATTR_CHARACTER
Definition: device.h:29
USHORT
unsigned short USHORT
Definition: pedump.c:61
NULL
#define NULL
Definition: types.h:112
HEAP_ZERO_MEMORY
#define HEAP_ZERO_MEMORY
Definition: compat.h:134
DPRINT1
#define DPRINT1
Definition: precomp.h:8
ULONG
unsigned int ULONG
Definition: retypes.h:1
EmsMemory
static PVOID EmsMemory
Definition: emsdrv.c:44
EmsIntHandler
static VOID WINAPI EmsIntHandler(LPWORD Stack)
Definition: emsdrv.c:260
node
Definition: dlist.c:348
InitHandlesTable
static VOID InitHandlesTable(VOID)
Definition: emsdrv.c:49
EMS_PAGE
struct _EMS_PAGE EMS_PAGE

Referenced by DosKRNLInitialize().