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69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
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* COPYRIGHT: GPLv2+ - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/dos/dos32krnl/himem.h
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* PURPOSE: DOS XMS Driver and UMB Provider
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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#ifndef _HIMEM_H_
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#define _HIMEM_H_
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/* DEFINITIONS ****************************************************************/
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#define XMS_ADDRESS 0x110000 // Just above HMA
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#define XMS_BLOCK_SIZE 1024
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#define XMS_BLOCKS ((MAX_ADDRESS - XMS_ADDRESS) / XMS_BLOCK_SIZE)
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#define XMS_MAX_HANDLES 16 // Specification: min 1, max 128, default 32
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#define XMS_STATUS_SUCCESS 0x00
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#define XMS_STATUS_NOT_IMPLEMENTED 0x80
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#define XMS_STATUS_A20_ERROR 0x82
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#define XMS_STATUS_HMA_DOES_NOT_EXIST 0x90
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#define XMS_STATUS_HMA_IN_USE 0x91
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#define XMS_STATUS_HMA_MIN_SIZE 0x92
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#define XMS_STATUS_HMA_NOT_ALLOCATED 0x93
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#define XMS_STATUS_A20_STILL_ENABLED 0x94
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#define XMS_STATUS_OUT_OF_MEMORY 0xA0
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#define XMS_STATUS_OUT_OF_HANDLES 0xA1
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#define XMS_STATUS_INVALID_HANDLE 0xA2
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#define XMS_STATUS_BAD_SRC_HANDLE 0xA3
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#define XMS_STATUS_BAD_DEST_HANDLE 0xA4
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#define XMS_STATUS_BAD_SRC_OFFSET 0xA5
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#define XMS_STATUS_BAD_DEST_OFFSET 0xA6
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#define XMS_STATUS_NOT_LOCKED 0xAA
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#define XMS_STATUS_LOCKED 0xAB
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#define XMS_STATUS_LOCK_OVERFLOW 0xAC
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#define XMS_STATUS_CANNOT_LOCK 0xAD
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#define XMS_STATUS_SMALLER_UMB 0xB0
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#define XMS_STATUS_OUT_OF_UMBS 0xB1
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#define XMS_STATUS_INVALID_UMB 0xB2
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typedef struct _XMS_HANDLE
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{
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BYTE Handle;
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BYTE LockCount;
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WORD Size;
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DWORD Address;
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} XMS_HANDLE, *PXMS_HANDLE;
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#pragma pack(push, 1)
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typedef struct _XMS_COPY_DATA
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{
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DWORD Count;
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WORD SourceHandle;
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DWORD SourceOffset;
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WORD DestHandle;
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DWORD DestOffset;
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} XMS_COPY_DATA, *PXMS_COPY_DATA;
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#pragma pack(pop)
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/* FUNCTIONS ******************************************************************/
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BOOLEAN XmsGetDriverEntry(PDWORD Pointer);
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VOID XmsInitialize(VOID);
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VOID XmsCleanup(VOID);
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#endif /* _HIMEM_H_ */
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