osfmk/i386/AT386/kernBootStruct.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * kernBootStruct.h
  24  * What the booter leaves behind for the kernel.
  25  */
  26
  27 /*
  28  * Maximum number of boot drivers that can be loaded.
  29  */
  30 #define NDRIVERS  500
  31
  32 /*
  33  * Types of boot driver that may be loaded by the booter.
  34  */
  35 enum {
  36     kBootDriverTypeInvalid = 0,
  37     kBootDriverTypeKEXT    = 1,
  38     kBootDriverTypeMKEXT   = 2
  39 };
  40
  41 typedef struct {
  42     unsigned long address;  // address where driver was loaded
  43     unsigned long size;     // number of bytes
  44     unsigned long type;     // driver type
  45 } driver_config_t;
  46
  47 /*
  48  * APM BIOS information.
  49  */
  50 typedef struct {
  51     unsigned short major_vers;    // == 0 if not present
  52     unsigned short minor_vers;
  53     unsigned long  cs32_base;
  54     unsigned long  cs16_base;
  55     unsigned long  ds_base;
  56     unsigned long  cs_length;
  57     unsigned long  ds_length;
  58     unsigned long  entry_offset;
  59     union {
  60         struct {
  61             unsigned long mode_16        :1;
  62             unsigned long mode_32        :1;
  63             unsigned long idle_slows_cpu :1;
  64             unsigned long reserved       :29;
  65         } f;
  66         unsigned long data;
  67     } flags;
  68     unsigned long connected;
  69 } APM_config_t;
  70
  71 /*
  72  * PCI bus information.
  73  */
  74 typedef struct _PCI_bus_info_t {
  75     union {
  76         struct {
  77             unsigned char configMethod1 :1;
  78             unsigned char configMethod2 :1;
  79             unsigned char               :2;
  80             unsigned char specialCycle1 :1;
  81             unsigned char specialCycle2 :1;
  82         } s;
  83         unsigned char d;
  84     } u_bus;
  85     unsigned char maxBusNum;
  86     unsigned char majorVersion;
  87     unsigned char minorVersion;
  88     unsigned char BIOSPresent;
  89 } PCI_bus_info_t;
  90
  91 /*
  92  * Video information.
  93  */
  94 struct boot_video {
  95     unsigned long v_baseAddr;   // Base address of video memory
  96     unsigned long v_display;    // Display Code (if Applicable
  97     unsigned long v_rowBytes;   // Number of bytes per pixel row
  98     unsigned long v_width;      // Width
  99     unsigned long v_height;     // Height
 100     unsigned long v_depth;      // Pixel Depth
 101 };
 102
 103 typedef struct boot_video  boot_video;
 104
 105 #define GRAPHICS_MODE     1
 106 #define TEXT_MODE         0
 107
 108 #define BOOT_STRING_LEN   160
 109 #define CONFIG_SIZE       (12 * 4096)
 110
 111 typedef struct {
 112     short            version;
 113     char             bootString[BOOT_STRING_LEN];  // boot arguments
 114     int              magicCookie;                  // KERNBOOTMAGIC
 115     int              numIDEs;                      // number of IDE drives
 116     int              rootdev;                      // root device
 117     int              convmem;                      // conventional memory
 118     int              extmem;                       // extended memory
 119     char             bootFile[128];                // kernel file name
 120     int              firstAddr0;                   // first address for kern convmem
 121     int              diskInfo[4];                  // info for bios dev 80-83
 122     int              graphicsMode;                 // booted in graphics mode?
 123     int              kernDev;                      // device kernel was fetched from
 124     int              numBootDrivers;               // number of drivers loaded
 125     char *           configEnd;                    // pointer to end of config files
 126     int              kaddr;                        // kernel load address
 127     int              ksize;                        // size of kernel
 128     driver_config_t  driverConfig[NDRIVERS];
 129     char             _reserved[2052];
 130     boot_video       video;
 131     PCI_bus_info_t   pciInfo;
 132     APM_config_t     apmConfig;
 133     char             config[CONFIG_SIZE];
 134 } KERNBOOTSTRUCT;
 135
 136 #define KERNSTRUCT_ADDR   ((KERNBOOTSTRUCT *) 0x11000)
 137 #define KERNBOOTMAGIC     0xa7a7a7a7
 138
 139 #ifndef KERNEL
 140 extern KERNBOOTSTRUCT *   kernBootStruct;
 141 #endif