--
--****************************************************************************
--*                                                                          *
--*  Copyright (c) 2001                                                      *
--*  by DIGITAL Equipment Corporation, Maynard, Mass.                        *
--*                                                                          *
--*  This software is furnished under a license and may be used and  copied  *
--*  only  in  accordance  with  the  terms  of  such  license and with the  *
--*  inclusion of the above copyright notice.  This software or  any  other  *
--*  copies  thereof may not be provided or otherwise made available to any  *
--*  other person.  No title to and ownership of  the  software  is  hereby  *
--*  transferred.                                                            *
--*                                                                          *
--*  The information in this software is subject to change  without  notice  *
--*  and  should  not  be  construed  as  a commitment by DIGITAL Equipment  *
--*  Corporation.                                                            *
--*                                                                          *
--*  DIGITAL assumes no responsibility for the use or  reliability  of  its  *
--*  software on equipment which is not supplied by DIGITAL.                 *
--*                                                                          *
--****************************************************************************
--********************************************************************************************************************
-- Created: 15-MAR-2001 22:51:00 by OpenVMS SDL EV1-33     
-- Source:   2-SEP-1989 10:37:50 $11$DUA933:[LIB_ADA.LIS]DDBDEF.SDL;1 
--********************************************************************************************************************
with SYSTEM; use SYSTEM;
with STARLET; use STARLET;
with CONDITION_HANDLING; use CONDITION_HANDLING;
 
package DDBDEF is
 
--  module $DDBDEF
 
--+
-- DDB - DEVICE DATA BLOCK
--
-- THERE IS ONE DEVICE DATA BLOCK FOR EACH CONTROLLER IN A SYSTEM.
--+
 
    DDB_K_PACK			: constant := 1;			-- LARGE DISK PACKS 
    DDB_K_CART			: constant := 2;			-- DISK CARTRIDGES 
    DDB_K_SLOW			: constant := 3;			-- SLOW (CHEAP) DISKS (E.G., FLOPPY) 
    DDB_K_TAPE			: constant := 4;			-- BLOCK STRUCTURED TAPE (E.G., TU58) 
    DDB_K_LENGTH		: constant := 68;			-- LENGTH OF STANDARD DDB 
    DDB_C_LENGTH		: constant := 68;			-- LENGTH OF STANDARD DDB 
 
    type DDB_ACPD_TYPE is						-- NAME OF DEFAULT ACP FOR DEVICE UNITS 
	record
	    FILLER_1	: UNSIGNED_BYTE_ARRAY (1 .. 3);
	    ACPCLASS	: UNSIGNED_BYTE;				-- CLASS CODE OF DEFAULT ACP 
									-- ACP CLASS CODE FOR DISKS 
	end record;
 
	    for DDB_ACPD_TYPE use 
		record
		    FILLER_1	at 0 range 0 .. 23;
		    ACPCLASS	at 3 range 0 .. 7;
		end record;
	    for DDB_ACPD_TYPE'SIZE use 32;
 
    DDB_ACPD_TYPE_INIT : constant DDB_ACPD_TYPE := 
	    (FILLER_1	=> (others => 0),
	    ACPCLASS	=> 0);
 
    type DDB_NAME_TYPE is						--    OF THE DEVICE 
	record
	    NAME_LEN	: UNSIGNED_BYTE;				--  	CHARACTER COUNT
	    NAME_STR	: STRING(1 .. 15);				--  	CHARACTER STRING
	end record;
 
	    for DDB_NAME_TYPE use 
		record
		    NAME_LEN	at 0 range 0 .. 7;
		    NAME_STR	at 1 range 0 .. 119;
		end record;
	    for DDB_NAME_TYPE'SIZE use 128;
 
    DDB_NAME_TYPE_INIT : constant DDB_NAME_TYPE := 
	    (NAME_LEN	=> 0,
	    NAME_STR	=> (others => ASCII.NUL));
 
    type DDB_DRVNAME_TYPE is						-- 
	record
	    DRVNAM_LEN	: UNSIGNED_BYTE;				--  	CHARACTER COUNT
	    DRVNAM_STR	: STRING(1 .. 15);				--  	CHARACTER STRING
	end record;
 
	    for DDB_DRVNAME_TYPE use 
		record
		    DRVNAM_LEN	at 0 range 0 .. 7;
		    DRVNAM_STR	at 1 range 0 .. 119;
		end record;
	    for DDB_DRVNAME_TYPE'SIZE use 128;
 
    DDB_DRVNAME_TYPE_INIT : constant DDB_DRVNAME_TYPE := 
	    (DRVNAM_LEN	=> 0,
	    DRVNAM_STR	=> (others => ASCII.NUL));
 
    type DDB_2P_UCB_TYPE is						--  ADDRESS OF FIRST UCB ON SECONDARY PATH
	record
	    DP_UCB	: UNSIGNED_LONGWORD;				--  OLD STYLE SYNONYM FOR ABOVE
	end record;
 
	    for DDB_2P_UCB_TYPE use 
		record
		    DP_UCB	at 0 range 0 .. 31;
		end record;
	    for DDB_2P_UCB_TYPE'SIZE use 32;
 
    DDB_2P_UCB_TYPE_INIT : constant DDB_2P_UCB_TYPE := 
	    (DP_UCB	=> 0);
 
    type DDB_TYPE is
	record
	    LINK	: UNSIGNED_LONGWORD;				-- ADDRESS OF NEXT DDB IN LIST (0=LAST) 
	    UCB		: UNSIGNED_LONGWORD;				-- ADDRESS OF FIRST UCB FOR THIS DDB 
	    SIZE	: UNSIGNED_WORD;				-- SIZE OF DDB IN BYTES 
	    TYP		: UNSIGNED_BYTE;				-- TYPE OF DATA STRUCTURE FOR DDB 
	    FILLER_1	: UNSIGNED_BYTE;				-- SPARE UNUSED BYTE 
	    DDT		: UNSIGNED_LONGWORD;				-- ADDRESS OF THE DRIVER DISPATCH TABLE 
	    ACPD	: DDB_ACPD_TYPE;				-- NAME OF DEFAULT ACP FOR DEVICE UNITS 
	    NAME	: DDB_NAME_TYPE;				--    OF THE DEVICE 
	    DRVNAME	: DDB_DRVNAME_TYPE;				-- 
	    SB		: UNSIGNED_LONGWORD;				-- ADDR OF SYSTEMBLOCK
	    CONLINK	: UNSIGNED_LONGWORD;				-- NEXT DDB IN CONNECTION SUB-CHAIN
	    ALLOCLS	: UNSIGNED_LONGWORD;				-- DEVICE ALLOCATION CLASS
	    DDB_2P_UCB	: DDB_2P_UCB_TYPE;				--  ADDRESS OF FIRST UCB ON SECONDARY PATH
	end record;
 
	    for DDB_TYPE use 
		record
		    LINK	at 0 range 0 .. 31;
		    UCB		at 4 range 0 .. 31;
		    SIZE	at 8 range 0 .. 15;
		    TYP		at 10 range 0 .. 7;
		    FILLER_1	at 11 range 0 .. 7;
		    DDT		at 12 range 0 .. 31;
		    ACPD	at 16 range 0 .. 31;
		    NAME	at 20 range 0 .. 127;
		    DRVNAME	at 36 range 0 .. 127;
		    SB		at 52 range 0 .. 31;
		    CONLINK	at 56 range 0 .. 31;
		    ALLOCLS	at 60 range 0 .. 31;
		    DDB_2P_UCB	at 64 range 0 .. 31;
		end record;
	    for DDB_TYPE'SIZE use 544;
 
    DDB_TYPE_INIT : constant DDB_TYPE := 
	    (LINK	=> 0,
	    UCB		=> 0,
	    SIZE	=> 0,
	    TYP		=> 0,
	    FILLER_1	=> 0,
	    DDT		=> 0,
	    ACPD	=> DDB_ACPD_TYPE_INIT,
	    NAME	=> DDB_NAME_TYPE_INIT,
	    DRVNAME	=> DDB_DRVNAME_TYPE_INIT,
	    SB		=> 0,
	    CONLINK	=> 0,
	    ALLOCLS	=> 0,
	    DDB_2P_UCB	=> DDB_2P_UCB_TYPE_INIT
	    );
 
end DDBDEF;