239 lines
9.4 KiB
C
239 lines
9.4 KiB
C
/* $NetBSD: ubavar.h,v 1.7 1995/11/10 19:25:51 ragge Exp $ */
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/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ubavar.h 7.7 (Berkeley) 6/28/90
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*/
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/*
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* This file contains definitions related to the kernel structures
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* for dealing with the unibus adapters.
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*
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* Each uba has a uba_softc structure.
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* Each unibus controller which is not a device has a uba_ctlr structure.
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* Each unibus device has a uba_device structure.
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*/
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#ifndef LOCORE
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#include "sys/buf.h"
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#include "sys/device.h"
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/*
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* Per-uba structure.
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*
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* This structure holds the interrupt vector for the uba,
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* and its address in physical and virtual space. At boot time
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* we determine the devices attached to the uba's and their
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* interrupt vectors, filling in uh_vec. We free the map
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* register and bdp resources of the uba into the structures
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* defined here.
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*
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* During normal operation, resources are allocated and returned
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* to the structures here. We watch the number of passive releases
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* on each uba, and if the number is excessive may reset the uba.
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*
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* When uba resources are needed and not available, or if a device
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* which can tolerate no other uba activity (rk07) gets on the bus,
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* then device drivers may have to wait to get to the bus and are
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* queued here. It is also possible for processes to block in
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* the unibus driver in resource wait (mrwant, bdpwant); these
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* wait states are also recorded here.
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*/
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struct uba_softc {
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struct device uh_dev; /* Device struct, autoconfig */
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int uh_type; /* type of adaptor */
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struct uba_regs *uh_uba; /* virt addr of uba adaptor regs */
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struct uba_regs *uh_physuba; /* phys addr of uba adaptor regs */
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struct pte *uh_mr; /* start of page map */
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int uh_memsize; /* size of uba memory, pages */
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caddr_t uh_mem; /* start of uba memory address space */
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caddr_t uh_iopage; /* start of uba io page */
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void (**Nuh_vec)(); /* interrupt vector */
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struct ivec_dsp *uh_idsp; /* Interrupt dispatch area */
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u_int *uh_iarea; /* Interrupt vector array */
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struct uba_device *uh_actf; /* head of queue to transfer */
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struct uba_device *uh_actl; /* tail of queue to transfer */
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short uh_mrwant; /* someone is waiting for map reg */
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short uh_bdpwant; /* someone awaits bdp's */
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int uh_bdpfree; /* free bdp's */
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int uh_hangcnt; /* number of ticks hung */
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int uh_zvcnt; /* number of recent 0 vectors */
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long uh_zvtime; /* time over which zvcnt accumulated */
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int uh_zvtotal; /* total number of 0 vectors */
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int uh_errcnt; /* number of errors */
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int uh_lastiv; /* last free interrupt vector */
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short uh_users; /* transient bdp use count */
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short uh_xclu; /* an rk07 is using this uba! */
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int uh_lastmem; /* limit of any unibus memory */
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#define UAMSIZ 100
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struct map *uh_map; /* register free map */
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};
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/* given a pointer to uba_regs, find DWBUA registers */
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/* this should be replaced with a union in uba_softc */
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#define BUA(uba) ((struct dwbua_regs *)(uba))
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/*
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* Per-controller structure.
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* (E.g. one for each disk and tape controller, and other things
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* which use and release buffered data paths.)
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*
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* If a controller has devices attached, then there are
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* cross-referenced uba_drive structures.
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* This structure is the one which is queued in unibus resource wait,
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* and saves the information about unibus resources which are used.
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* The queue of devices waiting to transfer is also attached here.
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*/
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struct uba_ctlr {
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struct uba_driver *um_driver;
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short um_ctlr; /* controller index in driver */
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short um_ubanum; /* the uba it is on */
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short um_alive; /* controller exists */
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void (*um_intr)(); /* interrupt handler(s) */
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caddr_t um_addr; /* address of device in i/o space */
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struct uba_softc *um_hd;
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/* the driver saves the prototype command here for use in its go routine */
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int um_cmd; /* communication to dgo() */
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int um_ubinfo; /* save unibus registers, etc */
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int um_bdp; /* for controllers that hang on to bdp's */
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struct buf um_tab; /* queue of devices for this controller */
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};
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/*
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* Per ``device'' structure.
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* (A controller has devices or uses and releases buffered data paths).
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* (Everything else is a ``device''.)
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*
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* If a controller has many drives attached, then there will
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* be several uba_device structures associated with a single uba_ctlr
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* structure.
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*
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* This structure contains all the information necessary to run
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* a unibus device such as a dz or a dh. It also contains information
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* for slaves of unibus controllers as to which device on the slave
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* this is. A flags field here can also be given in the system specification
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* and is used to tell which dz lines are hard wired or other device
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* specific parameters.
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*/
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struct uba_device {
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struct uba_driver *ui_driver;
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short ui_unit; /* unit number on the system */
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short ui_ctlr; /* mass ctlr number; -1 if none */
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short ui_ubanum; /* the uba it is on */
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short ui_slave; /* slave on controller */
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void (*ui_intr)(); /* interrupt handler(s) */
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caddr_t ui_addr; /* address of device in i/o space */
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short ui_dk; /* if init 1 set to number for iostat */
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int ui_flags; /* parameter from system specification */
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short ui_alive; /* device exists */
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short ui_type; /* driver specific type information */
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caddr_t ui_physaddr; /* phys addr, for standalone (dump) code */
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/* this is the forward link in a list of devices on a controller */
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struct uba_device *ui_forw;
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/* if the device is connected to a controller, this is the controller */
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struct uba_ctlr *ui_mi;
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struct uba_softc *ui_hd;
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};
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/*
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* Per-driver structure.
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*
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* Each unibus driver defines entries for a set of routines
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* as well as an array of types which are acceptable to it.
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* These are used at boot time by the configuration program.
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*/
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struct uba_driver {
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int (*ud_probe)(); /* see if a driver is really there */
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int (*ud_slave)(); /* see if a slave is there */
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int (*ud_attach)(); /* setup driver for a slave */
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int (*ud_dgo)(); /* fill csr/ba to start transfer */
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u_short *ud_addr; /* device csr addresses */
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char *ud_dname; /* name of a device */
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struct uba_device **ud_dinfo; /* backpointers to ubdinit structs */
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char *ud_mname; /* name of a controller */
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struct uba_ctlr **ud_minfo; /* backpointers to ubminit structs */
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short ud_xclu; /* want exclusive use of bdp's */
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short ud_keepbdp; /* hang on to bdp's once allocated */
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int (*ud_ubamem)(); /* see if dedicated memory is present */
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};
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#endif
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/*
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* Flags to UBA map/bdp allocation routines
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*/
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#define UBA_NEEDBDP 0x01 /* transfer needs a bdp */
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#define UBA_CANTWAIT 0x02 /* don't block me */
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#define UBA_NEED16 0x04 /* need 16 bit addresses only */
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#define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */
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/*
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* Macros to bust return word from map allocation routines.
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* SHOULD USE STRUCTURE TO STORE UBA RESOURCE ALLOCATION:
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*/
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#ifdef notyet
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struct ubinfo {
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long ub_addr; /* unibus address: mr + boff */
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int ub_nmr; /* number of registers, 0 if empty */
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int ub_bdp; /* bdp number, 0 if none */
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};
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#define UBAI_MR(i) (((i) >> 9) & 0x7ff) /* starting map register */
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#define UBAI_BOFF(i) ((i)&0x1ff) /* page offset */
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#else
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#define UBAI_BDP(i) ((int)(((unsigned)(i)) >> 28))
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#define BDPMASK 0xf0000000
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#define UBAI_NMR(i) ((int)((i) >> 20) & 0xff) /* max 255 (=127.5K) */
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#define UBA_MAXNMR 255
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#define UBAI_MR(i) ((int)((i) >> 9) & 0x7ff) /* max 2047 */
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#define UBA_MAXMR 2047
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#define UBAI_BOFF(i) ((int)((i) & 0x1ff))
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#define UBAI_ADDR(i) ((int)((i) & 0xfffff)) /* uba addr (boff+mr) */
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#define UBAI_INFO(off, mr, nmr, bdp) \
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(((bdp) << 28) | ((nmr) << 20) | ((mr) << 9) | (off))
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#endif
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#ifndef LOCORE
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#ifdef _KERNEL
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#define ubago(ui) ubaqueue(ui, 0)
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/*
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* Ubminit and ubdinit initialize the mass storage controller and
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* device tables specifying possible devices.
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*/
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extern struct uba_ctlr ubminit[];
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extern struct uba_device ubdinit[];
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extern struct cfdriver ubacd;
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#endif /* _KERNEL */
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#endif !LOCORE
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