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 "io_inline.h"
  30 #include "libsaio.h"
  31 #include "kernBootStruct.h"
  32
  33 // CMOS access ports in I/O space.
  34 //
  35 #define CMOSADDR    0x70
  36 #define CMOSDATA    0x71
  37 #define HDTYPE      0x12
  38
  39 /*==========================================================================
  40  * Returns the number of active ATA drives since these will increment the
  41  * bios device numbers of SCSI drives.
  42  */
  43 static int
  44 countIDEDisks()
  45 {
  46     int            count = 0;
  47     unsigned short hdtype;
  48
  49 #if DEBUG
  50     struct driveParameters param;
  51
  52     printf("Reading drive parameters...\n");
  53     readDriveParameters(0x80, &param);
  54     printf("%d fixed disk drive(s) installed\n", param.totalDrives);
  55     for (count = 0; count < 256; count++)
  56     {
  57         if (readDriveParameters(count + 0x80, &param))
  58             break;
  59         else
  60         {
  61             printf("Drive %d: %d cyls, %d heads, %d sectors\n",
  62                    count, param.cylinders, param.heads, param.sectors);
  63         }
  64     }
  65     outb(CMOSADDR, 0x11);
  66     printf("CMOS addr 0x11 = %x\n",inb(CMOSDATA));
  67     outb(CMOSADDR, 0x12);
  68     printf("CMOS addr 0x12 = %x\n",inb(CMOSDATA));
  69     return count;
  70 #endif
  71
  72     outb( CMOSADDR, HDTYPE );
  73     hdtype = (unsigned short) inb( CMOSDATA );
  74
  75     if (hdtype & 0xF0) count++;
  76     if (hdtype & 0x0F) count++;
  77     return count;
  78 }
  79
  80 /*==========================================================================
  81  * Initialize the 'kernBootStruct'. A structure of parameters passed to
  82  * the kernel by the booter.
  83  */
  84
  85 KERNBOOTSTRUCT * kernBootStruct = (KERNBOOTSTRUCT *) KERNSTRUCT_ADDR;
  86
  87 void
  88 initKernBootStruct()
  89 {
  90     unsigned char i;
  91
  92     bzero( (char *) kernBootStruct, sizeof(*kernBootStruct) );
  93
  94     // Get size of conventional memory.
  95
  96     kernBootStruct->convmem = memsize(0);
  97
  98     // Get size of extended memory.
  99
 100     kernBootStruct->extmem  = memsize(1);
 101
 102     // Get number of ATA devices.
 103
 104     kernBootStruct->numIDEs = countIDEDisks();
 105
 106     // Get disk info from BIOS.
 107
 108     for ( i = 0; i < 4; i++ )
 109     {
 110         kernBootStruct->diskInfo[i] = get_diskinfo(0x80 + i);
 111     }
 112
 113     kernBootStruct->magicCookie  = KERNBOOTMAGIC;
 114     kernBootStruct->configEnd    = kernBootStruct->config;
 115     kernBootStruct->graphicsMode = GRAPHICS_MODE;
 116 }