osfmk/i386/AT386/kernBootStruct.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * kernBootStruct.h
  27  * What the booter leaves behind for the kernel.
  28  */
  29
  30 /*
  31  * Maximum number of boot drivers that can be loaded.
  32  */
  33 #define NDRIVERS  500
  34
  35 /*
  36  * Types of boot driver that may be loaded by the booter.
  37  */
  38 enum {
  39     kBootDriverTypeInvalid = 0,
  40     kBootDriverTypeKEXT    = 1,
  41     kBootDriverTypeMKEXT   = 2
  42 };
  43
  44 typedef struct {
  45     unsigned long address;  // address where driver was loaded
  46     unsigned long size;     // number of bytes
  47     unsigned long type;     // driver type
  48 } driver_config_t;
  49
  50 /*
  51  * APM BIOS information.
  52  */
  53 typedef struct {
  54     unsigned short major_vers;    // == 0 if not present
  55     unsigned short minor_vers;
  56     unsigned long  cs32_base;
  57     unsigned long  cs16_base;
  58     unsigned long  ds_base;
  59     unsigned long  cs_length;
  60     unsigned long  ds_length;
  61     unsigned long  entry_offset;
  62     union {
  63         struct {
  64             unsigned long mode_16        :1;
  65             unsigned long mode_32        :1;
  66             unsigned long idle_slows_cpu :1;
  67             unsigned long reserved       :29;
  68         } f;
  69         unsigned long data;
  70     } flags;
  71     unsigned long connected;
  72 } APM_config_t;
  73
  74 /*
  75  * PCI bus information.
  76  */
  77 typedef struct _PCI_bus_info_t {
  78     union {
  79         struct {
  80             unsigned char configMethod1 :1;
  81             unsigned char configMethod2 :1;
  82             unsigned char               :2;
  83             unsigned char specialCycle1 :1;
  84             unsigned char specialCycle2 :1;
  85         } s;
  86         unsigned char d;
  87     } u_bus;
  88     unsigned char maxBusNum;
  89     unsigned char majorVersion;
  90     unsigned char minorVersion;
  91     unsigned char BIOSPresent;
  92 } PCI_bus_info_t;
  93
  94 /*
  95  * Video information.
  96  */
  97 struct boot_video {
  98     unsigned long v_baseAddr;   // Base address of video memory
  99     unsigned long v_display;    // Display Code (if Applicable
 100     unsigned long v_rowBytes;   // Number of bytes per pixel row
 101     unsigned long v_width;      // Width
 102     unsigned long v_height;     // Height
 103     unsigned long v_depth;      // Pixel Depth
 104 };
 105
 106 typedef struct boot_video  boot_video;
 107
 108 #define GRAPHICS_MODE     1
 109 #define TEXT_MODE         0
 110
 111 #define BOOT_STRING_LEN   160
 112 #define CONFIG_SIZE       (12 * 4096)
 113
 114 typedef struct {
 115     short            version;
 116     char             bootString[BOOT_STRING_LEN];  // boot arguments
 117     int              magicCookie;                  // KERNBOOTMAGIC
 118     int              numIDEs;                      // number of IDE drives
 119     int              rootdev;                      // root device
 120     int              convmem;                      // conventional memory
 121     int              extmem;                       // extended memory
 122     char             bootFile[128];                // kernel file name
 123     int              firstAddr0;                   // first address for kern convmem
 124     int              diskInfo[4];                  // info for bios dev 80-83
 125     int              graphicsMode;                 // booted in graphics mode?
 126     int              kernDev;                      // device kernel was fetched from
 127     int              numBootDrivers;               // number of drivers loaded
 128     char *           configEnd;                    // pointer to end of config files
 129     int              kaddr;                        // kernel load address
 130     int              ksize;                        // size of kernel
 131     driver_config_t  driverConfig[NDRIVERS];
 132     char             _reserved[2052];
 133     boot_video       video;
 134     PCI_bus_info_t   pciInfo;
 135     APM_config_t     apmConfig;
 136     char             config[CONFIG_SIZE];
 137 } KERNBOOTSTRUCT;
 138
 139 #define KERNSTRUCT_ADDR   ((KERNBOOTSTRUCT *) 0x11000)
 140 #define KERNBOOTMAGIC     0xa7a7a7a7
 141
 142 #ifndef KERNEL
 143 extern KERNBOOTSTRUCT *   kernBootStruct;
 144 #endif