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299 lines
13 KiB
C
299 lines
13 KiB
C
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/*
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File: BootItt.h
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Contains: Definitions and Structures for booting with the new SCSI Manager
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Entry points:
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Written by: Clinton Bauder
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Copyright: © 1992-1994 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<SM15> 1/13/94 chp Lose the local redefinitions of dNeedLock and dRAMBased.
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<SM14> 11/22/93 pdw Rolling in from <MCxx>.
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<MC3> 11/9/93 pdw Fixed problem with almost-bootable floppies where, after they
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failed, we booted from a non-default volume.
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<SM13> 10/14/93 pdw <MC> roll-in.
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<MC2> 9/26/93 pdw Changed some pbs.
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<SM12> 8/23/93 pdw Adding function prototypes for the two new Ck4<pram> functions.
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<SM11> 5/29/93 PW Fixing up ipl_rec_area typedefs.
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<SM10> 5/29/93 PW Temporarily added IPLRecord.h contents here. I will make a new
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.h when we finalize what will be in it.
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<SM9> 5/5/93 PW Converted names to meanies-friendly names. Updated with latest
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from Ludwig stuff.
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<LW7> 4/14/93 DCB Removed definitions of SCSIAtomic and Uniplemented
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<LW6> 3/8/93 PW Removing Lo-mem definitions. (Included SysEqu instead in the
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including files instead).
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<LW5> 3/1/93 DCB Changed startup PRAM to match slot drivers.
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<LW4> 2/13/93 PW Moved SetLoadFlag macro to a routine in BootItt.c for SCSIDrvrs
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lo-mem support. Rolled in some of the PDM changes to make it
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easier to remain sane.
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<SM6> 2/4/93 PW Added unused short to BootInfo structure to make it native
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aligned.
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<SM5> 2/1/93 PW Update from the latest of Ludwig. Also changes required for PDM
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(will update Ludwig with these as needed myself).
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<LW3> 1/27/93 DCB Added defines for CmdOptShiftDel startup sequence to fix Radar
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Bug 1051033.
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<LW2> 1/27/93 PW Converted to 16-bit LUN and back again.
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<SM4> 10/30/92 DCB Changed to reflect new acam.h
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<SM3> 9/16/92 CB Fixed a minor boot problem with HD SC Setup wherein async
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drivers didn't load because the mount flag value contained
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garbage. This might have also caused problems with some third
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party disk drivers.
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<SM2> 7/28/92 PW First real check-in.
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<0> 6/24/92 DCB New Today
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*/
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#ifndef __BOOTITT__
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#define __BOOTITT__
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#ifndef __XPTPRIV__
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#include "XPTpriv.h"
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#endif
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/* Structure definitions */
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typedef struct {
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ulong ddBlock;
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ushort ddSize;
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ushort ddType;
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} ddMap;
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typedef struct {
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DeviceIdent DevIdent;
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SCSI_IO *ioPB;
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Boolean IdentMsg;
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} DevInfo;
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typedef struct {
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DefStartRec startPRAM; // long word
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ushort BusCount;
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ushort defltDrvrRefNum; // ref num of driver for default boot device
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ulong IDmasks[];
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} BootInfo;
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/* Function Prototypes */
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Boolean ISITT();
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void INITSCSIBOOT( void );
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short ITTBOOT( ulong onlyStartup, Boolean * forceBootPtr );
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short ScRead( DevInfo *, ulong, ulong, ushort, Ptr);
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ulong CheckSumDrvr( Ptr driver,ushort length );
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OSErr SOpenDriver(SpBlockPtr sp);
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Boolean Ck4IgnoreCmdShOptDel( void);
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Boolean Ck4OnlyLoadFromDefault( void);
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/* Useful Macros */
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#define TestLoadFlag(a,b) ((1 << b.targetID) & a->IDmasks[b.bus]) // <SM4>
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short JmpToDrvr( long devIDorTargID, Ptr theDriver, Ptr DrvrDescMap, Ptr HFSPartBlock);
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#define CmdShiftOptDel 0x8805 // command, shift, option and delete keys down bits
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#define lm_KeyMap 0x174 // bitmap of the keyboard [2 longs]
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#define SCSIDrvrs (*(uchar *)0xb2e)
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/* slot category and type values, values were established by DTS */
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#define CatIntBus 0xC /* Intelligent bus sRsrc_Type from DTS */
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#define TypXPT 0x000B /* official XPT type */
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#define TypSIM 0x000C /* official SIM type */
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#define DrvrSwScsi43 0x1 /* official software protocol */
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/*****************************************************************************
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Here is the C structure that describes the AIX format block 0.
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int's are 4 bytes, short's are 2. The type unique_id_t is 4 int's long.
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What you have to to is look for the value IPLRECID in the first 4 bytes and if
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it matches, look in the boot_lv_start field. This will point you to a block
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that looks like an Apple driver descriptor block (block 0 on an apple drive).
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The next block will be the start of the partition map.
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My assumption is that you'll use the information out of that Apple partition
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map to load our secondary loader as an Apple_driver. We'll specify (using the
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CPU type field) whether we want to be launched as emulated 68K code or as
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native PowerPC code.
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One question... do you want the block numbers in the driver partition entry to
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specify real physical block numbers or block numbers offset by boot_lv_start?
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We can do either, but if we offset the block numbers is it a problem if the
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block number is negative?
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One other question... I assume your code will ignore the drive if the block
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pointed to by boot_lv_start doesn't look like an Apple block 0. This is the
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behavior we would like so PDM won't try to boot IBM RS/6000 drives.
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If you have any questions, give my a call at 2-6202 or drop me e-mail (Quick
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mail prefered).
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Thanks,
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Jeff
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*****************************************************************************/
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#ifndef _H_BOOTRECORD
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#define _H_BOOTRECORD
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/*
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* COMPONENT_NAME: (KBOOT) bootrecord.h header file
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*
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* ORIGINS: 27
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*
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* (C) COPYRIGHT International Business Machines Corp. 1988, 1989
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* All Rights Reserved
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* Licensed Materials - Property of IBM
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*
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* US Government Users Restricted Rights - Use, duplication or
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* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
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*/
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/*****************************************************************************/
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/* */
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/* This file defines the IPL Record template. The IPL Record information is */
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/* contained on one sector. */
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/* */
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/* Acronyms used in this file: */
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/* PSN Physical Sector Number */
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/* IPL Initial Program Load */
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/* BLV Boot Logical Volume */
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/* SLV Service Logical Volume */
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/* */
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/* General notes: */
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/* Fragmentation implies that code which is loaded into memory may not be */
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/* loaded in one completely contiguous area and inherently refers to memory*/
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/* above the first megabyte bound of memory since the processor environment*/
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/* requires the first meg to be good. That is, code which crosses or is */
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/* completely contained above the first meg of memory may need to be */
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/* fragmented. This is reflected in the value of the "boot_frag" flag which*/
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/* is defined below. */
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/* */
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/* Usage examples for this file: */
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/* */
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/* IPL_REC_PTR my_rec_ptr defines my_rec_ptr as a pointer to the */
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/* struct "ipl_rec_area". */
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/* */
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/* IPL_REC my_rec can be used to define memory space for */
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/* an ipl record. */
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/* */
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/* sizeof(IPL_REC) will return the size (in bytes) of */
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/* ipl_rec_area */
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/* */
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/* my_rec.field_name either of these can be used to access */
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/* my_rec_ptr->field_name an element of the ipl record (shown */
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/* here as "field_name"). */
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/* */
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/*****************************************************************************/
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typedef long unique_id_t[4];
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typedef struct ipl_rec_area
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{
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unsigned long IPL_record_id; /* This physical volume contains a */
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/* valid IPL record if and only if */
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/* this field contains IPLRECID */
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#define IPLRECID 0xc9c2d4c1
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char reserved1[20];
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unsigned long formatted_cap; /* Formatted capacity. The number of */
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/* sectors available after formatting*/
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/* The presence or absence of bad */
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/* blocks does not alter this value. */
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char last_head; /* THIS IS DISKETTE INFORMATION */
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/* The number of heads minus 1. Heads*/
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/* are number from 0 to last_head. */
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char last_sector; /* THIS IS DISKETTE INFORMATION */
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/* The number of sectors per track. */
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/* Sectors are numbered from 1 to */
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/* last_sector. */
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char reserved2[6];
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unsigned long boot_code_length; /* Boot code length in sectors. A 0 */
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/* value implies no boot code present*/
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unsigned long boot_code_offset; /* Boot code offset. Must be 0 if no */
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/* boot code present, else contains */
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/* byte offset from start of boot */
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/* code to first instruction. */
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unsigned long boot_lv_start; /* Contains the PSN of the start of */
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/* the BLV. */
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unsigned long boot_prg_start; /* Boot code start. Must be 0 if no */
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/* boot code present, else contains */
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/* the PSN of the start of boot code.*/
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unsigned long boot_lv_length; /* BLV length in sectors. */
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unsigned long boot_load_add; /* 512 byte boundary load address for*/
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/* boot code. */
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char boot_frag; /* Boot code fragmentation flag. Must*/
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/* be 0 if no fragmentation allowed, */
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/* else must be 0x01. */
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char reserved3[3];
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unsigned short basecn_length; /* Number of sectors for base */
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/* customization. Normal mode. */
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unsigned short basecs_length; /* Number of sectors for base */
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/* customization. Service mode. */
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unsigned long basecn_start; /* Starting PSN value for base */
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/* customization. Normal mode. */
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unsigned long basecs_start; /* Starting PSN value for base */
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/* customization. Service mode. */
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char reserved4[24];
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unsigned long L_length; /* Service code length in sectors. */
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/* A 0 value implies no service code */
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/* present. */
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unsigned long ser_code_offset; /* Service code offset. Must be 0 if */
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/* no service code is present, else */
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/* contains byte offset from start of*/
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/* service code to first instruction.*/
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unsigned long ser_lv_start; /* Contains the PSN of the start of */
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/* the SLV. */
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unsigned long ser_prg_start; /* Service code start. Must be 0 if */
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/* service code is not present, else */
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/* contains the PSN of the start of */
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/* service code. */
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unsigned long ser_lv_length; /* SLV length in sectors. */
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unsigned long ser_load_add; /* 512 byte boundary load address for*/
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/* service code. */
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char ser_frag; /* Service code fragmentation flag. */
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/* Must be 0 if no fragmentation */
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/* allowed, else must be 0x01. */
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char reserved5[3];
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unique_id_t pv_id; /* The unique identifier for this */
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/* physical volume. */
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char dummy[512 - 128 - sizeof(unique_id_t)];
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} ipl_rec_area;
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#endif /* _H_BOOTRECORD */
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#endif __BOOTITT__
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