/* Copyright 1984 by the Massachusetts Institute of Technology */

/* Structure definitions for system datatypes.
 */

#ifdef mc68000
# include	"../q68/68.h"
#endif
#ifdef vax
# include	"../vax/vax.h"
#endif
 

/* I/O request block */

#define	iorb	struct	iorbstr
#define	dct	struct	dctstr

iorb {	iorb	*i_link;	/* 00  Link to next iorb */
	dct	*i_devp;	/* 04   */
	void	(*i_cmp)();	/* 08  I/O completion routine */
	byte	*i_addr;	/* 0c  Start of data */
	byte	i_usr1;		/* 10   */
	unss	i_breq;		/* 12  Bytes requested */
	bits	i_stat;		/* 14  Status */
	unss	i_bxfr;		/* 16  Bytes transfered */
	word	i_usr2;		/* 18  netp */
	word	i_usr3;		/* 1c   */
	word	i_usr4;		/* 20  time pkt was rcvd (not used) */
	word	i_usr5;		/* 24   */
	word	i_usr6;		/* 28   */
	};

#define	mkiorb(x)	((iorb *) (x))

/* IORB Status bits */
#define	I_ERR	0x000f		/* the low 4 bits can be used to pass
				 * an error code if desired */
#define	I_BRD	0x10		/* set if pkt was broadcast */
#define	I_DONE	0x80

/* Device control table */

dct {	md_ihx	d_ihx;
	void	(* d_iha)();
	iorb	*d_qhd;
	iorb	*d_qtl;
	dct	*d_lnk;
	word	*d_iva;
	void	(* d_ina)();
	word	d_csr;
	word	d_buf;
	void	(* d_strt)();
	bits	d_flg;
	byte	*d_addr;
	unss	d_breq;
	word	d_dev1;		/* Used by the DEQNA for its buffer
				 * list and statistics, used by VII
				 * for statistics. */
	word	d_dev2;		/* Used for statistics copy routine. */
	word	d_dev3;
	unsb	d_crf;
	byte	d_null;
	unsw	d_rc;
	byte	*d_rfnt;
	byte	*d_rend;
	byte	*d_rhd;
	byte	*d_rtl;
	byte	d_rbuf[20];
	};

#define	mkdct(x)	((dct *) (x))
/*
 * inth		interrupt handler
 * init		device initialization routine
 * start	driver xfer start routine
 * csr		device control/status register
 * iva		device interrupt vector address
 * link		link to associated device
 */
#define	DCTMAC(inth, init, start, csr, iva, link) \
  { MD_IHD, inth, 0, 0, link, (word *)iva, init, csr, 0, start }

#define	D_HLD	01
#define	D_STP	02
#define	D_DWN	04
#define	D_RUN	040
#define	D_ACT	0100
#define	D_DV1	01000
#define	D_DV2	02000
#define	D_INI	040000
#define	D_OFL	0100000

#define NO_IVEC ((word *)-1)

/* Initialization list definition. */
struct inittbl	{
	int	(*init_routine)();
	word	init_data;
};

#define	tskblk	struct	tskstr

tskblk	{	tskblk	*tsk_link;
		unsb	tsk_pri;
		unsb	tsk_spare;
		word	tsk_data;
		void	(* tsk_hndlr)();
	};		


#define	hndlre	struct	hndstr

hndlre	{	tskblk	*h_twait;
		tskblk	*h_tfree;		
	};