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GuruMeditation
Docs » Include » libraries » configregs.h / .i
#ifndef LIBRARIES_CONFIGREGS_H
#define LIBRARIES_CONFIGREGS_H
/*
**	$VER: configregs.h 36.13 (15.2.1991)
**	Includes Release 45.1
**
**	AutoConfig (tm) hardware register and bit definitions
**
**	(C) Copyright 1985-2001 Amiga, Inc.
**	    All Rights Reserved
*/


#ifndef EXEC_TYPES_H
#include <exec/types.h>
#endif	/* EXEC_TYPES_H */


/*
** AutoConfig (tm) boards each contain a 32 byte "ExpansionRom" area that is
** read by the system software at configuration time.  Configuration of each
** board starts when the ConfigIn* signal is passed from the previous board
** (or from the system for the first board).  Each board will present it's
** ExpansionRom structure at location $00E80000 to be read by the system.
** This file defines the appearance of the ExpansionRom area.
**
** Expansion boards are actually organized such that only one nybble per
** 16 bit word contains valid information.  The low nybbles of each
** word are combined to fill the structure below. (This table is structured
** as LOGICAL information.  This means that it never corresponds exactly
** with a physical implementation.)
**
** The ExpansionRom space is further split into two regions:  The first 16
** bytes are read-only.  Except for the er_type field, this area is inverted
** by the system software when read in.  The second 16 bytes contain the
** control portion, where all read/write registers are located.
**
** The system builds one "ConfigDev" structure for each board found.  The
** list of boards can be examined using the expansion.library/FindConfigDev
** function.
**
** A special "hacker" Manufacturer ID number is reserved for test use:
** 2011 ($7DB).  When inverted this will look like $F824.
*/

struct ExpansionRom {		/* -First 16 bytes of the expansion ROM */
    UBYTE	er_Type;	/* Board type, size and flags */
    UBYTE	er_Product;	/* Product number, assigned by manufacturer */
    UBYTE	er_Flags;	/* Flags */
    UBYTE	er_Reserved03;	/* Must be zero ($ff inverted) */
    UWORD	er_Manufacturer; /* Unique ID,ASSIGNED BY AMIGA, INC.! */
    ULONG	er_SerialNumber; /* Available for use by manufacturer */
    UWORD	er_InitDiagVec; /* Offset to optional "DiagArea" structure */
    UBYTE	er_Reserved0c;
    UBYTE	er_Reserved0d;
    UBYTE	er_Reserved0e;
    UBYTE	er_Reserved0f;
};


/*
** Note that use of the ec_BaseAddress register is tricky.  The system
** will actually write twice.  First the low order nybble is written
** to the ec_BaseAddress register+2 (D15-D12).	Then the entire byte is
** written to ec_BaseAddress (D15-D8).	This allows writing of a byte-wide
** address to nybble size registers.
*/

struct ExpansionControl {	/* -Second 16 bytes of the expansion ROM */
    UBYTE	ec_Interrupt;	/* Optional interrupt control register */
    UBYTE	ec_Z3_HighBase; /* Zorro III   : Config address bits 24-31 */
    UBYTE	ec_BaseAddress; /* Zorro II/III: Config address bits 16-23 */
    UBYTE	ec_Shutup;	/* The system writes here to shut up a board */
    UBYTE	ec_Reserved14;
    UBYTE	ec_Reserved15;
    UBYTE	ec_Reserved16;
    UBYTE	ec_Reserved17;
    UBYTE	ec_Reserved18;
    UBYTE	ec_Reserved19;
    UBYTE	ec_Reserved1a;
    UBYTE	ec_Reserved1b;
    UBYTE	ec_Reserved1c;
    UBYTE	ec_Reserved1d;
    UBYTE	ec_Reserved1e;
    UBYTE	ec_Reserved1f;
};

/*
** many of the constants below consist of a triplet of equivalent
** definitions: xxMASK is a bit mask of those bits that matter.
** xxBIT is the starting bit number of the field.  xxSIZE is the
** number of bits that make up the definition.	This method is
** used when the field is larger than one bit.
**
** If the field is only one bit wide then the xxB_xx and xxF_xx convention
** is used (xxB_xx is the bit number, and xxF_xx is mask of the bit).
*/

/* manifest constants */
#define E_SLOTSIZE		0x10000
#define E_SLOTMASK		0xffff
#define E_SLOTSHIFT		16

/* these define the free regions of Zorro memory space.
** THESE MAY WELL CHANGE FOR FUTURE PRODUCTS!
*/
#define E_EXPANSIONBASE	0x00e80000	/* Zorro II  config address */
#define EZ3_EXPANSIONBASE	0xff000000	/* Zorro III config address */

#define E_EXPANSIONSIZE	0x00080000	/* Zorro II  I/O type cards */
#define E_EXPANSIONSLOTS	8

#define E_MEMORYBASE		0x00200000	/* Zorro II  8MB space */
#define E_MEMORYSIZE		0x00800000
#define E_MEMORYSLOTS		128

#define EZ3_CONFIGAREA		0x40000000	/* Zorro III space */
#define EZ3_CONFIGAREAEND	0x7FFFFFFF	/* Zorro III space */
#define EZ3_SIZEGRANULARITY	0x00080000	/* 512K increments */



/**** er_Type definitions (ttldcmmm) ***************************************/

/* er_Type board type bits -- the OS ignores "old style" boards */
#define ERT_TYPEMASK		0xc0	/* Bits 7-6 */
#define ERT_TYPEBIT		6
#define ERT_TYPESIZE		2
#define ERT_NEWBOARD		0xc0
#define ERT_ZORROII		ERT_NEWBOARD
#define ERT_ZORROIII		0x80

/* other bits defined in er_Type */
#define ERTB_MEMLIST		5   /* Link RAM into free memory list */
#define ERTB_DIAGVALID		4   /* ROM vector is valid */
#define ERTB_CHAINEDCONFIG	3   /* Next config is part of the same card */

#define ERTF_MEMLIST		(1<<5)
#define ERTF_DIAGVALID		(1<<4)
#define ERTF_CHAINEDCONFIG	(1<<3)

/* er_Type field memory size bits */
#define ERT_MEMMASK		0x07	/* Bits 2-0 */
#define ERT_MEMBIT		0
#define ERT_MEMSIZE		3



/**** er_Flags byte -- for those things that didn't fit into the type byte ****/
/**** the hardware stores this byte in inverted form			   ****/
#define ERFF_MEMSPACE		(1<<7)	/* Wants to be in 8 meg space. */
#define ERFB_MEMSPACE		7	/* (NOT IMPLEMENTED) */

#define ERFF_NOSHUTUP		(1<<6)	/* Board can't be shut up */
#define ERFB_NOSHUTUP		6

#define ERFF_EXTENDED		(1<<5)	/* Zorro III: Use extended size table */
#define ERFB_EXTENDED		5	/*	      for bits 0-2 of er_Type */
					/* Zorro II : Must be 0 */

#define ERFF_ZORRO_III		(1<<4)	/* Zorro III: must be 1 */
#define ERFB_ZORRO_III		4	/* Zorro II : must be 0 */

#define ERT_Z3_SSMASK		0x0F	/* Bits 3-0.  Zorro III Sub-Size.  How */
#define ERT_Z3_SSBIT		0	/* much space the card actually uses   */
#define ERT_Z3_SSSIZE		4	/* (regardless of config granularity)  */
					/* Zorro II : must be 0	       */


/* ec_Interrupt register (unused) ********************************************/
#define ECIB_INTENA		1
#define ECIB_RESET		3
#define ECIB_INT2PEND		4
#define ECIB_INT6PEND		5
#define ECIB_INT7PEND		6
#define ECIB_INTERRUPTING	7

#define ECIF_INTENA		(1<<1)
#define ECIF_RESET		(1<<3)
#define ECIF_INT2PEND		(1<<4)
#define ECIF_INT6PEND		(1<<5)
#define ECIF_INT7PEND		(1<<6)
#define ECIF_INTERRUPTING	(1<<7)



/* figure out amount of memory needed by this box/board */
#define ERT_MEMNEEDED(t)	\
	(((t)&ERT_MEMMASK)? 0x10000 << (((t)&ERT_MEMMASK) -1) : 0x800000 )

/* same as ERT_MEMNEEDED, but return number of slots */
#define ERT_SLOTSNEEDED(t)	\
	(((t)&ERT_MEMMASK)? 1 << (((t)&ERT_MEMMASK)-1) : 0x80 )



/* convert a expansion slot number into a memory address */
#define EC_MEMADDR(slot)		((slot) << (E_SLOTSHIFT) )

/* a kludge to get the byte offset of a structure */
#define EROFFSET(er)	((int)&((struct ExpansionRom *)0)->er)
#define ECOFFSET(ec)	\
 (sizeof(struct ExpansionRom)+((int)&((struct ExpansionControl *)0)->ec))



/***************************************************************************
**
** these are the specifications for the diagnostic area.  If the Diagnostic
** Address Valid bit is set in the Board Type byte (the first byte in
** expansion space) then the Diag Init vector contains a valid offset.
**
** The Diag Init vector is actually a word offset from the base of the
** board.  The resulting address points to the base of the DiagArea
** structure.  The structure may be physically implemented either four,
** eight, or sixteen bits wide.  The code will be copied out into
** ram first before being called.
**
** The da_Size field, and both code offsets (da_DiagPoint and da_BootPoint)
** are offsets from the diag area AFTER it has been copied into ram, and
** "de-nibbleized" (if needed).  (In other words, the size is the size of
** the actual information, not how much address space is required to
** store it.)
**
** All bits are encoded with uninverted logic (e.g. 5 volts on the bus
** is a logic one).
**
** If your board is to make use of the boot facility then it must leave
** its config area available even after it has been configured.  Your
** boot vector will be called AFTER your board's final address has been
** set.
**
****************************************************************************/

struct DiagArea {
    UBYTE	da_Config;	/* see below for definitions */
    UBYTE	da_Flags;	/* see below for definitions */
    UWORD	da_Size;	/* the size (in bytes) of the total diag area */
    UWORD	da_DiagPoint;	/* where to start for diagnostics, or zero */
    UWORD	da_BootPoint;	/* where to start for booting */
    UWORD	da_Name;	/* offset in diag area where a string */
				/*   identifier can be found (or zero if no */
				/*   identifier is present). */

    UWORD	da_Reserved01;	/* two words of reserved data.	must be zero. */
    UWORD	da_Reserved02;
};

/* da_Config definitions */
/*
** DAC_BYTEWIDE can be simulated using DAC_NIBBLEWIDE.
*/
#define DAC_BUSWIDTH	0xC0 /* two bits for bus width */
#define DAC_NIBBLEWIDE	0x00
#define DAC_BYTEWIDE	0x40 /* BUG: Will not work under V34 Kickstart! */
#define DAC_WORDWIDE	0x80

#define DAC_BOOTTIME	0x30	/* two bits for when to boot */
#define DAC_NEVER	0x00	/* obvious */
#define DAC_CONFIGTIME	0x10	/* call da_BootPoint when first configing */
				/*   the device */
#define DAC_BINDTIME	0x20	/* run when binding drivers to boards */

/*
**
** These are the calling conventions for the diagnostic callback
** (from da_DiagPoint):
**
** A7 -- points to at least 2K of stack
** A6 -- ExecBase
** A5 -- ExpansionBase
** A3 -- your board's ConfigDev structure
** A2 -- Base of diag/init area that was copied
** A0 -- Base of your board
**
** Your board must return a value in D0.  If this value is NULL, then
** the diag/init area that was copied in will be returned to the free
** memory pool.
*/


#endif /* LIBRARIES_CONFIGREGS_H */

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