freeldr/freeldr/miscboot.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2002  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20
  21 #include "freeldr.h"
  22 #include "arch.h"
  23 #include "miscboot.h"
  24 #include "rtl.h"
  25 #include "fs.h"
  26 #include "ui.h"
  27 #include "parseini.h"
  28 #include "disk.h"
  29
  30 VOID LoadAndBootBootSector(PUCHAR OperatingSystemName)
  31 {
  32         PFILE   FilePointer;
  33         UCHAR   SettingName[80];
  34         UCHAR   SettingValue[80];
  35         ULONG   SectionId;
  36         UCHAR   FileName[260];
  37         ULONG   BytesRead;
  38
  39         // Find all the message box settings and run them
  40         ShowMessageBoxesInSection(OperatingSystemName);
  41
  42         // Try to open the operating system section in the .ini file
  43         if (!OpenSection(OperatingSystemName, &SectionId))
  44         {
  45                 sprintf(SettingName, "Section [%s] not found in freeldr.ini.\n", OperatingSystemName);
  46                 MessageBox(SettingName);
  47                 return;
  48         }
  49
  50         if (!ReadSectionSettingByName(SectionId, "BootDrive", SettingValue, 80))
  51         {
  52                 MessageBox("Boot drive not specified for selected OS!");
  53                 return;
  54         }
  55
  56         BootDrive = atoi(SettingValue);
  57
  58         BootPartition = 0;
  59         if (ReadSectionSettingByName(SectionId, "BootPartition", SettingValue, 80))
  60         {
  61                 BootPartition = atoi(SettingValue);
  62         }
  63
  64         if (!ReadSectionSettingByName(SectionId, "BootSectorFile", FileName, 260))
  65         {
  66                 MessageBox("Boot sector file not specified for selected OS!");
  67                 return;
  68         }
  69
  70         if (!OpenDiskDrive(BootDrive, BootPartition))
  71         {
  72                 MessageBox("Failed to open boot drive.");
  73                 return;
  74         }
  75
  76         FilePointer = OpenFile(FileName);
  77         if (FilePointer == NULL)
  78         {
  79                 strcat(FileName, " not found.");
  80                 MessageBox(FileName);
  81                 return;
  82         }
  83
  84         // Read boot sector
  85         if (!ReadFile(FilePointer, 512, &BytesRead, (void*)0x7c00) || (BytesRead != 512))
  86         {
  87                 DiskError("Disk read error.");
  88                 return;
  89         }
  90
  91         // Check for validity
  92         if (*((WORD*)(0x7c00 + 0x1fe)) != 0xaa55)
  93         {
  94                 MessageBox("Invalid boot sector magic (0xaa55)");
  95                 return;
  96         }
  97
  98         clrscr();
  99         showcursor();
 100         stop_floppy();
 101         JumpToBootCode();
 102 }
 103
 104 VOID LoadAndBootPartition(PUCHAR OperatingSystemName)
 105 {
 106         char    name[260];
 107         char    value[260];
 108         int             head, sector, cylinder;
 109         int             offset;
 110         int             i;
 111
 112         // Find all the message box settings and run them
 113         /*for (i=1; i<=GetNumSectionItems(OSList[nOSToBoot].name); i++)
 114         {
 115                 ReadSectionSettingByNumber(OSList[nOSToBoot].name, i, name, value);
 116                 if (stricmp(name, "MessageBox") == 0)
 117                         MessageBox(value);
 118                 if (stricmp(name, "MessageLine") == 0)
 119                         MessageLine(value);
 120         }
 121
 122         if (!ReadSectionSettingByName(OSList[nOSToBoot].name, "BootDrive", value))
 123         {
 124                 MessageBox("Boot drive not specified for selected OS!");
 125                 return;
 126         }
 127
 128         BootDrive = atoi(value);
 129
 130         if (!ReadSectionSettingByName(OSList[nOSToBoot].name, "BootPartition", value))
 131         {
 132                 MessageBox("Boot partition not specified for selected OS!");
 133                 return;
 134         }
 135
 136         BootPartition = atoi(value);
 137
 138         if (!BiosInt13Read(BootDrive, 0, 0, 1, 1, DISKREADBUFFER))
 139         {
 140                 MessageBox("Disk Read Error");
 141                 return;
 142         }
 143
 144         // Check for validity
 145         if (*((WORD*)(DISKREADBUFFER + 0x1fe)) != 0xaa55)
 146         {
 147                 MessageBox("Invalid partition table magic (0xaa55)");
 148                 return;
 149         }
 150
 151         offset = 0x1BE + ((BootPartition-1) * 0x10);
 152
 153         // Check for valid partition
 154         if (SectorBuffer[offset + 4] == 0)
 155         {
 156                 MessageBox("Invalid boot partition");
 157                 return;
 158         }
 159
 160         head = SectorBuffer[offset + 1];
 161         sector = (SectorBuffer[offset + 2] & 0x3F);
 162         cylinder = SectorBuffer[offset + 3];
 163         if (SectorBuffer[offset + 2] & 0x80)
 164                 cylinder += 0x200;
 165         if (SectorBuffer[offset + 2] & 0x40)
 166                 cylinder += 0x100;
 167
 168         // Read partition boot sector
 169         if (!biosdisk(_DISK_READ, BootDrive, head, cylinder, sector, 1, (void*)0x7c00))
 170         {
 171                 MessageBox("Disk Read Error");
 172                 return;
 173         }
 174
 175         // Check for validity
 176         if (*((WORD*)(0x7c00 + 0x1fe)) != 0xaa55)
 177         {
 178                 MessageBox("Invalid boot sector magic (0xaa55)");
 179                 return;
 180         }
 181
 182         RestoreScreen(ScreenBuffer);
 183         showcursor();
 184         gotoxy(CursorXPos, CursorYPos);
 185
 186         stop_floppy();
 187         JumpToBootCode();*/
 188 }
 189
 190 VOID LoadAndBootDrive(PUCHAR OperatingSystemName)
 191 {
 192         UCHAR   SettingName[80];
 193         UCHAR   SettingValue[80];
 194         ULONG   SectionId;
 195
 196         // Find all the message box settings and run them
 197         ShowMessageBoxesInSection(OperatingSystemName);
 198
 199         // Try to open the operating system section in the .ini file
 200         if (!OpenSection(OperatingSystemName, &SectionId))
 201         {
 202                 sprintf(SettingName, "Section [%s] not found in freeldr.ini.\n", OperatingSystemName);
 203                 MessageBox(SettingName);
 204                 return;
 205         }
 206
 207         if (!ReadSectionSettingByName(SectionId, "BootDrive", SettingValue, 80))
 208         {
 209                 MessageBox("Boot drive not specified for selected OS!");
 210                 return;
 211         }
 212
 213         BootDrive = atoi(SettingValue);
 214
 215         if (!BiosInt13Read(BootDrive, 0, 0, 1, 1, (PVOID)0x7C00))
 216         {
 217                 DiskError("Disk read error.");
 218                 return;
 219         }
 220
 221         // Check for validity
 222         if (*((WORD*)(0x7c00 + 0x1fe)) != 0xaa55)
 223         {
 224                 MessageBox("Invalid boot sector magic (0xaa55)");
 225                 return;
 226         }
 227
 228         clrscr();
 229         showcursor();
 230         stop_floppy();
 231         JumpToBootCode();
 232 }