dlls/krnl386.exe16/int13.c

   1 /*
   2  * BIOS interrupt 13h handler
   3  *
   4  * Copyright 1997 Andreas Mohr
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <sys/types.h>
  25 #ifdef HAVE_UNISTD_H
  26 # include <unistd.h>
  27 #endif
  28
  29 #ifdef HAVE_SYS_IOCTL_H
  30 # include <sys/ioctl.h>
  31 #endif
  32 #include <fcntl.h>
  33 #ifdef linux
  34 #ifdef HAVE_LINUX_COMPILER_H
  35 #include <linux/compiler.h>
  36 #endif
  37 # include <linux/fd.h>
  38 #endif
  39
  40 #include "dosexe.h"
  41 #include "wine/server.h"
  42 #include "wine/debug.h"
  43
  44 WINE_DEFAULT_DEBUG_CHANNEL(int);
  45
  46
  47 /*
  48  * Status of last int13 operation.
  49  */
  50 static BYTE INT13_last_status;
  51
  52
  53 /**********************************************************************
  54  *         INT13_SetStatus
  55  *
  56  * Write status to AH register and set carry flag on error (AH != 0).
  57  *
  58  * Despite what Ralf Brown says, at least functions 0x06 and 0x07
  59  * seem to set carry, too.
  60  */
  61 static void INT13_SetStatus( CONTEXT *context, BYTE status )
  62 {
  63     INT13_last_status = status;
  64
  65     SET_AH( context, status );
  66
  67     if (status)
  68         SET_CFLAG( context );
  69     else
  70         RESET_CFLAG( context );
  71 }
  72
  73
  74 /**********************************************************************
  75  *          INT13_ReadFloppyParams
  76  *
  77  * Read floppy disk parameters.
  78  */
  79 static void INT13_ReadFloppyParams( CONTEXT *context )
  80 {
  81 #ifdef linux
  82     static const BYTE floppy_params[2][13] =
  83     {
  84         { 0xaf, 0x02, 0x25, 0x02, 0x12, 0x1b, 0xff, 0x6c, 0xf6, 0x0f, 0x08 },
  85         { 0xaf, 0x02, 0x25, 0x02, 0x12, 0x1b, 0xff, 0x6c, 0xf6, 0x0f, 0x08 }
  86     };
  87
  88     static const DWORD drive_type_info[7]={
  89         0x0000, /* none */
  90         0x2709, /* 360 K */
  91         0x4f0f, /* 1.2 M */
  92         0x4f09, /* 720 K */
  93         0x4f12, /* 1.44 M */
  94         0x4f24, /* 2.88 M */
  95         0x4f24  /* 2.88 M */
  96     };
  97
  98     unsigned int i;
  99     unsigned int nr_of_drives = 0;
 100     BYTE drive_nr = DL_reg( context );
 101     int floppy_fd;
 102     int r;
 103     struct floppy_drive_params floppy_parm;
 104     WCHAR root[] = {'A',':','\\',0}, drive_root[] = {'\\','\\','.','\\','A',':',0};
 105     HANDLE h;
 106
 107     TRACE("in  [ EDX=%08x ]\n", context->Edx );
 108
 109     SET_AL( context, 0 );
 110     SET_BX( context, 0 );
 111     SET_CX( context, 0 );
 112     SET_DH( context, 0 );
 113
 114     for (i = 0; i < MAX_DOS_DRIVES; i++, root[0]++)
 115         if (GetDriveTypeW(root) == DRIVE_REMOVABLE) nr_of_drives++;
 116     SET_DL( context, nr_of_drives );
 117
 118     if (drive_nr > 1) {
 119         /* invalid drive ? */
 120         INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
 121         return;
 122     }
 123
 124     drive_root[4] = 'A' + drive_nr;
 125     h = CreateFileW(drive_root, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
 126                     FILE_FLAG_BACKUP_SEMANTICS, NULL);
 127     if (h == INVALID_HANDLE_VALUE ||
 128         wine_server_handle_to_fd(h, FILE_READ_DATA, &floppy_fd, NULL))
 129     {
 130         WARN("Can't determine floppy geometry !\n");
 131         INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
 132         return;
 133     }
 134     r = ioctl(floppy_fd, FDGETDRVPRM, &floppy_parm);
 135     wine_server_release_fd( h, floppy_fd );
 136     CloseHandle(h);
 137
 138     if(r<0)
 139     {
 140         INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
 141         return;
 142     }
 143
 144     SET_BL( context, floppy_parm.cmos );
 145
 146     /*
 147      * CH = low eight bits of max cyl
 148      * CL = max sec nr (bits 5-0),
 149      *      hi two bits of max cyl (bits 7-6)
 150      * DH = max head nr
 151      */
 152     if(BL_reg( context ) && BL_reg( context ) < 7)
 153     {
 154         SET_DH( context, 0x01 );
 155         SET_CX( context, drive_type_info[BL_reg( context )] );
 156     }
 157
 158     context->Edi = (DWORD)floppy_params[drive_nr];
 159
 160     if(!context->Edi)
 161     {
 162         ERR("Get floppy params failed for drive %d\n", drive_nr);
 163         INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
 164         return;
 165     }
 166
 167     TRACE("out [ EAX=%08x EBX=%08x ECX=%08x EDX=%08x EDI=%08x ]\n",
 168           context->Eax, context->Ebx, context->Ecx, context->Edx, context->Edi);
 169
 170     INT13_SetStatus( context, 0x00 ); /* success */
 171
 172     /* FIXME: Word exits quietly if we return with no error. Why? */
 173     FIXME("Returned ERROR!\n");
 174     SET_CFLAG( context );
 175
 176 #else
 177     INT13_SetStatus( context, 0x01 ); /* invalid function */
 178 #endif
 179 }
 180
 181
 182 /**********************************************************************
 183  *         DOSVM_Int13Handler
 184  *
 185  * Handler for int 13h (disk I/O).
 186  */
 187 void WINAPI DOSVM_Int13Handler( CONTEXT *context )
 188 {
 189     TRACE( "AH=%02x\n", AH_reg( context ) );
 190
 191     switch( AH_reg( context ) )
 192     {
 193     case 0x00: /* RESET DISK SYSTEM */
 194         INT13_SetStatus( context, 0x00 ); /* success */
 195         break;
 196
 197     case 0x01: /* STATUS OF DISK SYSTEM */
 198         INT13_SetStatus( context, INT13_last_status );
 199         break;
 200
 201     case 0x02: /* READ SECTORS INTO MEMORY */
 202         SET_AL( context, 0 ); /* number of sectors transferred */
 203         INT13_SetStatus( context, 0x00 ); /* success */
 204         break;
 205
 206     case 0x03: /* WRITE SECTORS FROM MEMORY */
 207         SET_AL( context, 0 ); /* number of sectors transferred */
 208         INT13_SetStatus( context, 0x00 ); /* success */
 209         break;
 210
 211     case 0x04: /* VERIFY DISK SECTOR(S) */
 212         SET_AL( context, 0 ); /* number of sectors verified */
 213         INT13_SetStatus( context, 0x00 ); /* success */
 214         break;
 215
 216     case 0x05: /* FORMAT TRACK */
 217     case 0x06: /* FORMAT TRACK AND SET BAD SECTOR FLAGS */
 218     case 0x07: /* FORMAT DRIVE STARTING AT GIVEN TRACK  */
 219         INT13_SetStatus( context, 0x0c ); /* unsupported track or invalid media */
 220         break;
 221
 222     case 0x08: /* GET DRIVE PARAMETERS  */
 223         if (DL_reg( context ) & 0x80)
 224         {
 225             /* hard disk ? */
 226             INT13_SetStatus( context, 0x07 ); /* drive parameter activity failed */
 227         }
 228         else
 229         {
 230             /* floppy disk */
 231             INT13_ReadFloppyParams( context );
 232         }
 233         break;
 234
 235     case 0x09: /* INITIALIZE CONTROLLER WITH DRIVE PARAMETERS */
 236     case 0x0a: /* FIXED DISK - READ LONG */
 237     case 0x0b: /* FIXED DISK - WRITE LONG */
 238     case 0x0c: /* SEEK TO CYLINDER */
 239     case 0x0d: /* ALTERNATE RESET HARD DISK */
 240         INT13_SetStatus( context, 0x00 ); /* success */
 241         break;
 242
 243     case 0x0e: /* READ SECTOR BUFFER */
 244     case 0x0f: /* WRITE SECTOR BUFFER */
 245         INT13_SetStatus( context, 0x01 ); /* invalid function */
 246         break;
 247
 248     case 0x10: /* CHECK IF DRIVE READY */
 249     case 0x11: /* RECALIBRATE DRIVE */
 250         INT13_SetStatus( context, 0x00 ); /* success */
 251         break;
 252
 253     case 0x12: /* CONTROLLER RAM DIAGNOSTIC */
 254     case 0x13: /* DRIVE DIAGNOSTIC */
 255         INT13_SetStatus( context, 0x01 ); /* invalid function */
 256         break;
 257
 258     case 0x14: /* CONTROLLER INTERNAL DIAGNOSTIC */
 259         INT13_SetStatus( context, 0x00 ); /* success */
 260         break;
 261
 262     case 0x15: /* GET DISK TYPE */
 263         if (DL_reg( context ) & 0x80)
 264         {
 265             /* hard disk ? */
 266             INT13_SetStatus( context, 0x00 ); /* success */
 267             /* type is fixed disk, overwrites status */
 268             SET_AH( context, 0x03 );
 269         }
 270         else
 271         {
 272             /* floppy disk */
 273             INT13_SetStatus( context, 0x00 ); /* success */
 274             /* type is floppy with change detection, overwrites status */
 275             SET_AH( context, 0x02 );
 276         }
 277         break;
 278
 279     case 0x16: /* FLOPPY - CHANGE OF DISK STATUS */
 280         INT13_SetStatus( context, 0x00 ); /* success */
 281         break;
 282
 283     case 0x17: /* SET DISK TYPE FOR FORMAT */
 284         if (DL_reg( context ) < 4)
 285             INT13_SetStatus( context, 0x00 ); /* successful completion */
 286         else
 287             INT13_SetStatus( context, 0x01 ); /* error */
 288         break;
 289
 290     case 0x18: /* SET MEDIA TYPE FOR FORMAT */
 291         if (DL_reg( context ) < 4)
 292             INT13_SetStatus( context, 0x00 ); /* success */
 293         else
 294             INT13_SetStatus( context, 0x01 ); /* error */
 295         break;
 296
 297     case 0x19: /* FIXED DISK - PARK HEADS */
 298         INT13_SetStatus( context, 0x00 ); /* success */
 299         break;
 300
 301     default:
 302         INT_BARF( context, 0x13 );
 303         INT13_SetStatus( context, 0x01 ); /* invalid function */
 304     }
 305 }