ubavar.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
 *	@(#)ubavar.h	4.1	(ULTRIX)	7/2/90	
 */


/************************************************************************
 *									*
 *			Copyright (c) 1984, 85, 86, 87, 88 by		*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   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.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   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.	*
 *									*
 ************************************************************************/
/*
 * Modification history:
 *
 * 23-Feb-90	Mark Parenti (map)
 *	Added structure for bus head structures.
 *	Added interrupt parameter field.
 *	Added defines for bus number.
 *
 * 20-Dec-89    Paul Grist
 *      Added VMEbus support (vba adapters). Had to add four new fields
 *      to the uba_ctlr and uba_device structures for the support of VMEbus 
 *      devices:
 *           1. addr2: address of the second csr
 *           2. bus_priority: VME device priority level 
 *           3. ivnum: 1st configured VMEbus device interrupt vector
 *           4. priority: the main bus request level of the VMEbus device
 *      The first three are initalized by config, the last is left to be
 *      initalized when the devices are auto-configured at boot time.
 *
 * 24-Jul-89    robin
 *	made tty_ubinfo and uba_hd be of size 1.  This will need to be changed
 *	to extern of size 0 when the "OTHER" code is merged into the V4.0 pool.
 *
 * 20-Jul-89	Mark A. Parenti
 *	Add define for UBAXMI for new SSP port.
 *
 * 26-Apr-89	Kong
 *	Changed some variables to have "volatile" attributes when
 *	compiled on a mips.
 *
 * 08-Jun-88	darrell for Ali
 *	Added VAX60 (Firefox LEGSS) support.
 *
 * 19-May-88    Fred Canter
 *	PTE maps for SCSI driver and extended I/O mode on CVAXstar/PVAX.
 *
 * 15-Feb-88	Fred Canter
 *	Added defines for VAX420 (CVAXstar/PVAX) cache size and address.
 *
 * 12-11-87	Robin L. and Larry C.
 *	Added portclass support to the system.
 *
 *  3-Aug-87 -- rafiey (Ali Rafieymehr)
 *	Added sgsys and SGSYSmap for VAXstation 2000.
 *
 * 23-Apr-87 -- darrell
 *	Added a vsdev (vaxstar device) structure and changed constant
 *	definitions in order to make vs_bufctl() in uba.c accept 
 *	a pointer to the routine to be called.
 *
 * 20-Apr-87 -- afd
 *	Moved Mayfair externals to ka650.h
 *
 * 06-Mar-87 -- afd
 *	Added external definitions for map names (& correponding virtual
 *	address names) for Mayfair/CVAX local register space, as per
 *	definitions in spt.s.
 *
 *  13-Dec-86 -- fred (Fred Canter)
 *	Added shmem and SHMEMmap for MicroVAX 2000 8 line SLU.
 *
 *   5-Aug-86 -- darrell (Darrell Dunnuck)
 *	Added definitions for VAXstar disk and TZK50 drivers
 *	sharing common disk buffer.
 *
 *   2-Jul-86 -- fred (Fred Canter)
 *	Added mapping for TEAMmate 8 line SLU registers.
 *
 * 18-Jun-86 -- fred (Fred Canter)
 *	Changes for VAXstar kernel support.
 *
 * 13-Jun-86   -- jaw 	fix to uba reset and drivers.
 *
 * 5-Jun-86   -- jaw 	changes to config.
 *
 * 18-mar-86  -- jaw     br/cvec changed to NOT use registers.
 *
 * 05-Mar-86 -- jaw  VAXBI device and controller config code added.
 *		     todr code put in cpusw.
 *
 * 08-Aug-85 -- darrell
 *	Add constants for zero vector timer fix, and an integer
 *	definition.
 *
 * 11-jul-85 -- jaw
 *	fix bua/bda map registers.
 *
 * 19-Jun-85 -- jaw
 *	VAX8200 name change.
 *
 * 06-Jun-85 -jaw
 *	added support for BDA.
 *
 * 13-Mar-85 -jaw
 *	Changes for support of the VAX8200 were merged in.
 *
 * 27-Feb-85 -tresvik
 *	Changes for support of the VAX8600 were merged in.
 *
 */
/*
 * This file contains definitions related to the kernel structures
 * for dealing with the unibus adapters.
 *
 * Each uba has a uba_hd structure.
 * Each unibus controller which is not a device has a uba_ctlr structure.
 * Each unibus device has a uba_device structure.
 */

#ifndef LOCORE
/* 

 */

struct bus_dispatch {
	int bus_num;
	int bus_vec;

};
/*
 * Per-uba structure.
 *
 * This structure holds the interrupt vector for the uba,
 * and its address in physical and virtual space.  At boot time
 * we determine the devices attached to the uba's and their
 * interrupt vectors, filling in uh_vec.  We free the map
 * register and bdp resources of the uba into the structures
 * defined here.
 *
 * During normal operation, resources are allocated and returned
 * to the structures here.  We watch the number of passive releases
 * on each uba, and if the number is excessive may reset the uba.
 * 
 * When uba resources are needed and not available, or if a device
 * which can tolerate no other uba activity (rk07) gets on the bus,
 * then device drivers may have to wait to get to the bus and are
 * queued here.  It is also possible for processes to block in
 * the unibus driver in resource wait (mrwant, bdpwant); these
 * wait states are also recorded here.
 */
struct	uba_hd {
	int	uba_type;		/* see defines below. */
	struct	uba_regs *uh_uba;	/* virt addr of uba */
	struct	uba_regs *uh_physuba;	/* phys addr of uba */
	int	(**uh_vec)();		/* interrupt vector */
	struct	uba_device *uh_actf;	/* head of queue to transfer */
	struct	uba_device *uh_actl;	/* tail of queue to transfer */
	short	uh_mrwant;		/* someone is waiting for map reg */
	short	uh_bdpwant;		/* someone awaits bdp's */
	int	uh_bdpfree;		/* free bdp's */
	int	uh_hangcnt;		/* number of ticks hung */
	int	uh_zvcnt;		/* number of 0 vectors */
	int	uh_zvflg;		/* flag for timing zero vectors */
	int	uh_errcnt;		/* number of errors */
	int	uh_lastiv;		/* last free interrupt vector */
	short	uh_users;		/* transient bdp use count */
	short	uh_xclu;		/* an rk07 is using this uba! */
#define	UAMSIZ	100
	struct	map *uh_map;		/* buffered data path regs free */
#define	QAMSIZ	1000
	struct	map *uq_map;		/* Q22 bus data path regs free */
};
#define UBA780	0x1
#define UBA750	0x2
#define UBA730	0x4
#define UBAUVI	0x8
#define UBAUVII	0x10
#define UBABUA	0x20
#define UBABDA	0x40
#define UBABLA	0x80
#define UBAXMI	0x100


#ifndef LOCORE
/*
 * Per-controller structure.
 * (E.g. one for each disk and tape controller, and other things
 * which use and release buffered data paths.)
 *
 * If a controller has devices attached, then there are
 * cross-referenced uba_drive structures.
 * This structure is the one which is queued in unibus resource wait,
 * and saves the information about unibus resources which are used.
 * The queue of devices waiting to transfer is also attached here.
 */
struct uba_ctlr {
	struct	uba_driver *um_driver;
	char	*um_ctlrname;	/* name of the controller */
	short	um_ctlr;	/* controller index in driver */
	caddr_t	ui_parent;
	int	um_adpt;	/* which i/o bus it is on */
	short	um_nexus;	/* which nexus on i/o bus */
	short	um_rctlr;	/* remote controller number */
	short	um_ubanum;	/* the uba it is on */
#define	um_vbanum	um_ubanum
	short	um_alive;	/* controller exists */
	int	(**um_intr)();	/* interrupt handler(s) */
	caddr_t	um_addr;	/* address of device in i/o space */
	caddr_t	um_addr2;	/* address of second csr */
	int     um_bus_priority;/* i/o bus specific priority */
	int     um_ivnum;       /* first interrupt vector number */
	int     um_priority;    /* main bus request level of ctrl */ 
	caddr_t	um_physaddr;	/* phys address of device in i/o space */
	union {
		struct	uba_hd *uba;
		struct	vba_hd *vba;
	}bus_head;
#define	um_hd		bus_head.uba
#define	um_vbahd	bus_head.vba
/* the driver saves the prototype command here for use in its go routine */
	int	um_cmd;		/* communication to dgo() */