usr.bin/doscmd/xms.h

   1 /*-
   2  * Copyright (c) 1997 Helmut Wirth <hfwirth@ping.at>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice immediately at the beginning of the file, witout modification,
  10  *    this list of conditions, and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/usr.bin/doscmd/xms.h,v 1.2 1999/08/28 01:00:27 peter Exp $
  29  * $DragonFly: src/usr.bin/doscmd/xms.h,v 1.3 2008/10/03 19:56:11 swildner Exp $
  30  */
  31
  32 #ifndef XMS_H
  33 #define XMS_H
  34
  35 #define XMS_VERSION   0x0300  /* version 3.00 */
  36 #define XMS_REVISION  0x0100  /* driver revision 1.0 */
  37
  38 #define NUM_HANDLES     64      /* number of available handles */
  39 #define FIRST_HANDLE    1       /* number of firts valid handle */
  40 #define PARAGRAPH       16      /* bytes in a paragraph */
  41 #define MAX_BLOCK_LOCKS 256     /* number of locks on a block */
  42 #define DEFAULT_EMM_SIZE 512 * 1024    /* default EMM size */
  43
  44 /* Register AH codes for XMS functions */
  45 #define  XMS_GET_VERSION                        0x00
  46 #define  XMS_ALLOCATE_HIGH_MEMORY               0x01
  47 #define  XMS_FREE_HIGH_MEMORY                   0x02
  48 #define  XMS_GLOBAL_ENABLE_A20                  0x03
  49 #define  XMS_GLOBAL_DISABLE_A20                 0x04
  50 #define  XMS_LOCAL_ENABLE_A20                   0x05
  51 #define  XMS_LOCAL_DISABLE_A20                  0x06
  52 #define  XMS_QUERY_A20                          0x07
  53 #define  XMS_QUERY_FREE_EXTENDED_MEMORY         0x08
  54 #define  XMS_ALLOCATE_EXTENDED_MEMORY           0x09
  55 #define  XMS_FREE_EXTENDED_MEMORY               0x0a
  56 #define  XMS_MOVE_EXTENDED_MEMORY_BLOCK         0x0b
  57 #define  XMS_LOCK_EXTENDED_MEMORY_BLOCK         0x0c
  58 #define  XMS_UNLOCK_EXTENDED_MEMORY_BLOCK       0x0d
  59 #define  XMS_GET_EMB_HANDLE_INFORMATION         0x0e
  60 #define  XMS_RESIZE_EXTENDED_MEMORY_BLOCK       0x0f
  61 #define  XMS_ALLOCATE_UMB                       0x10
  62 #define  XMS_DEALLOCATE_UMB                     0x11
  63 #define  XMS_REALLOCATE_UMB                     0x12
  64 /* New functions for values bigger than 65MB, not implented yet */
  65 #define  XMS_QUERY_FREE_EXTENDED_MEMORY_LARGE   0x88
  66 #define  XMS_ALLOCATE_EXTENDED_MEMORY_LARGE     0x89
  67 #define  XMS_FREE_EXTENDED_MEMORY_LARGE         0x8a
  68
  69
  70 /* XMS error return codes */
  71 #define XMS_SUCCESS                     0x0
  72 #define XMS_NOT_IMPLEMENTED             0x80
  73 #define XMS_VDISK                       0x81   /* If vdisk.sys is present */
  74 #define XMS_A20_ERROR                   0x82
  75 #define XMS_GENERAL_ERROR               0x8e
  76 #define XMS_HMA_NOT_MANAGED             0x90
  77 #define XMS_HMA_ALREADY_USED            0x91
  78 #define XMS_HMA_NOT_ALLOCATED           0x93
  79 #define XMS_A20_STILL_ENABLED           0x94
  80 #define XMS_FULL                        0xa0
  81 #define XMS_OUT_OF_HANDLES              0xa1
  82 #define XMS_INVALID_HANDLE              0xa2
  83 #define XMS_INVALID_SOURCE_HANDLE       0xa3
  84 #define XMS_INVALID_SOURCE_OFFSET       0xa4
  85 #define XMS_INVALID_DESTINATION_HANDLE  0xa5
  86 #define XMS_INVALID_DESTINATION_OFFSET  0xa6
  87 #define XMS_INVALID_LENGTH              0xa7
  88 #define XMS_BLOCK_NOT_LOCKED            0xaa
  89 #define XMS_BLOCK_IS_LOCKED             0xab
  90 #define XMS_BLOCK_LOCKCOUNT_OVERFLOW    0xac
  91 #define XMS_REQUESTED_UMB_TOO_BIG       0xb0
  92 #define XMS_NO_UMBS_AVAILABLE           0xb1
  93 #define XMS_INVALID_UMB_SEGMENT         0xb2
  94
  95
  96 /*
  97  * EMM structure for data exchange with DOS caller, hence the
  98  * packed format
  99  */
 100
 101 struct EMM {
 102    u_long  nbytes;
 103    u_short src_handle __attribute__ ((packed));
 104    u_long  src_offset __attribute__ ((packed));
 105    u_short dst_handle __attribute__ ((packed));
 106    u_long  dst_offset __attribute__ ((packed));
 107 } ;
 108
 109 /*
 110  * XMS info structure, only used to pass information to and from
 111  * DOS
 112  */
 113
 114 struct XMSinfo {
 115    u_char handle;                               /* the handle */
 116    u_char num_locks;                            /* number of locks */
 117    u_long size;                                 /* size of memory */
 118    u_long phys_addr;                            /* "physical" address */
 119 } __packed;
 120
 121 /*
 122  * Handle management inside the emulator for extendend memory pages,
 123  * invisible to DOS
 124  */
 125
 126 typedef struct {
 127    u_long addr;         /* address inside emulator, from malloc() */
 128    u_long size;         /* size in bytes */
 129    u_char num_locks;    /* lock count for this handle */
 130 } XMS_handle;
 131
 132 /*
 133  * Managment of UMB memory paragraphs (16 bytes). UMB blocks are
 134  * directly accessible by VM86 applications and lie between 0xd0000 and
 135  * 0xefff0 in VM86 memory space.
 136  */
 137
 138 struct _UMB_block {
 139    u_long addr;                 /* Start address of block */
 140    u_long size;                 /* Size in bytes */
 141    struct _UMB_block *next;
 142 };
 143
 144 typedef struct _UMB_block UMB_block;
 145
 146 #endif /* XMS_H */