Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...

[reactos.git] / subsystems / mvdm / ntvdm / dos / dos32krnl / emsdrv.h

diff --git a/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.h b/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.h
new file mode 100644 (file)
index 0000000..0d3f1f6
--- /dev/null
+++ b/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.h
@@ -0,0 +1,103 @@
+/*
+ * COPYRIGHT:       GPLv2+ - See COPYING in the top level directory
+ * PROJECT:         ReactOS Virtual DOS Machine
+ * FILE:            subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.h
+ * PURPOSE:         DOS EMS Driver
+ * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ */
+
+#ifndef _EMSDRV_H_
+#define _EMSDRV_H_
+
+/* DEFINITIONS ****************************************************************/
+
+#define EMS_VERSION_NUM     0x40
+#define EMS_INTERRUPT_NUM   0x67
+#define EMS_SEGMENT         0xD000  // Default segment
+// Specification: Operating system handle 0x0000; user handles from 0x0001 to 0x00FE
+#define EMS_MAX_HANDLES     255
+#define EMS_PAGE_BITS       14
+#define EMS_PAGE_SIZE       (1 << EMS_PAGE_BITS)
+#define EMS_PHYSICAL_PAGES  4
+
+/* 16 MB of EMS memory */
+#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
+
+typedef struct _EMS_HANDLE
+{
+    BOOLEAN Allocated;
+    USHORT PageCount;
+    LIST_ENTRY PageList;
+    UCHAR Name[8];
+} EMS_HANDLE, *PEMS_HANDLE;
+
+typedef struct _EMS_PAGE
+{
+    LIST_ENTRY Entry;
+    USHORT Handle;
+} EMS_PAGE, *PEMS_PAGE;
+
+#pragma pack(push, 1)
+
+typedef struct _EMS_HANDLE_PAGE_INFO
+{
+    USHORT Handle;
+    USHORT PageCount;
+} EMS_HANDLE_PAGE_INFO, *PEMS_HANDLE_PAGE_INFO;
+
+typedef struct _EMS_HANDLE_DIR_ENTRY
+{
+    USHORT Handle;
+    UCHAR  Name[8];
+} EMS_HANDLE_DIR_ENTRY, *PEMS_HANDLE_DIR_ENTRY;
+
+typedef struct _EMS_COPY_DATA
+{
+    ULONG RegionLength;
+    UCHAR SourceType;
+    USHORT SourceHandle;
+    USHORT SourceOffset;
+    USHORT SourceSegment;
+    UCHAR DestType;
+    USHORT DestHandle;
+    USHORT DestOffset;
+    USHORT DestSegment;
+} EMS_COPY_DATA, *PEMS_COPY_DATA;
+
+typedef struct _EMS_MAPPABLE_PHYS_PAGE
+{
+    USHORT PageSegment;
+    USHORT PageNumber;
+} EMS_MAPPABLE_PHYS_PAGE, *PEMS_MAPPABLE_PHYS_PAGE;
+
+typedef struct _EMS_HARDWARE_INFO
+{
+    WORD RawPageSize;
+    WORD AlternateRegSets;
+    WORD ContextAreaSize;
+    WORD DmaRegisterSets;
+    WORD DmaChannelOperation;
+} EMS_HARDWARE_INFO, *PEMS_HARDWARE_INFO;
+
+#pragma pack(pop)
+
+/* FUNCTIONS ******************************************************************/
+
+BOOLEAN EmsDrvInitialize(USHORT Segment, ULONG TotalPages);
+VOID EmsDrvCleanup(VOID);
+
+#endif /* _EMSDRV_H_ */