i386/libsaio/bootstruct.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright 1993 NeXT, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #include "libsaio.h"
  30
  31 // CMOS access ports in I/O space.
  32 //
  33 #define CMOSADDR    0x70
  34 #define CMOSDATA    0x71
  35 #define HDTYPE      0x12
  36
  37 /*==========================================================================
  38  * Returns the number of active ATA drives since these will increment the
  39  * bios device numbers of SCSI drives.
  40  */
  41 static int countIDEDisks()
  42 {
  43     int            count = 0;
  44     unsigned short hdtype;
  45
  46 #if DEBUG
  47     struct driveParameters param;
  48
  49     printf("Reading drive parameters...\n");
  50     readDriveParameters(0x80, &param);
  51     printf("%d fixed disk drive(s) installed\n", param.totalDrives);
  52     for (count = 0; count < 256; count++)
  53     {
  54         if (readDriveParameters(count + 0x80, &param))
  55             break;
  56         else
  57         {
  58             printf("Drive %d: %d cyls, %d heads, %d sectors\n",
  59                    count, param.cylinders, param.heads, param.sectors);
  60         }
  61     }
  62     outb(CMOSADDR, 0x11);
  63     printf("CMOS addr 0x11 = %x\n",inb(CMOSDATA));
  64     outb(CMOSADDR, 0x12);
  65     printf("CMOS addr 0x12 = %x\n",inb(CMOSDATA));
  66     return count;
  67 #endif
  68
  69     outb( CMOSADDR, HDTYPE );
  70     hdtype = (unsigned short) inb( CMOSDATA );
  71
  72     if (hdtype & 0xF0) count++;
  73     if (hdtype & 0x0F) count++;
  74     return count;
  75 }
  76
  77 /*==========================================================================
  78  * Initialize the 'kernBootStruct'. A structure of parameters passed to
  79  * the kernel by the booter.
  80  */
  81
  82 KERNBOOTSTRUCT * kernBootStruct = (KERNBOOTSTRUCT *) KERNSTRUCT_ADDR;
  83
  84 void initKernBootStruct( int biosdev )
  85 {
  86     static int init_done = 0;
  87     unsigned char i;
  88
  89     if ( !init_done )
  90     {
  91         bzero( (char *) kernBootStruct, sizeof(*kernBootStruct) );
  92
  93         // Get size of conventional memory.
  94
  95         kernBootStruct->convmem = memsize(0);
  96
  97         // Get size of extended memory.
  98
  99         kernBootStruct->extmem  = memsize(1);
 100
 101         kernBootStruct->magicCookie  = KERNBOOTMAGIC;
 102         kernBootStruct->configEnd    = kernBootStruct->config;
 103         kernBootStruct->graphicsMode = TEXT_MODE;
 104
 105         init_done = 1;
 106     }
 107
 108     // Get number of ATA devices.
 109
 110     kernBootStruct->numIDEs = countIDEDisks();
 111
 112     // Get disk info from BIOS.
 113
 114     for ( i = 0; i < 4; i++ )
 115     {
 116         kernBootStruct->diskInfo[i] = get_diskinfo(0x80 + i);
 117     }
 118
 119     // Update kernDev from biosdev.
 120
 121     switch ( BIOS_DEV_TYPE( biosdev ) )
 122     {
 123         case kBIOSDevTypeNetwork:
 124             kernBootStruct->kernDev = B_TYPE(DEV_EN); break;
 125         case kBIOSDevTypeHardDrive:
 126             kernBootStruct->kernDev = B_TYPE(DEV_HD); break;
 127         case kBIOSDevTypeFloppy:
 128             kernBootStruct->kernDev = B_TYPE(DEV_FD); break;
 129     }
 130 }