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- /*
- * Copyright (c) 1982, 1986 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)ubavar.h 7.7 (Berkeley) 6/28/90
- */
-
- /*
- * 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
- /*
- * 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 uh_type; /* type of adaptor */
- struct uba_regs *uh_uba; /* virt addr of uba adaptor regs */
- struct uba_regs *uh_physuba; /* phys addr of uba adaptor regs */
- struct pte *uh_mr; /* start of page map */
- int uh_memsize; /* size of uba memory, pages */
- caddr_t uh_mem; /* start of uba memory address space */
- caddr_t uh_iopage; /* start of uba io page */
- 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 recent 0 vectors */
- long uh_zvtime; /* time over which zvcnt accumulated */
- int uh_zvtotal; /* total number of 0 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! */
- int uh_lastmem; /* limit of any unibus memory */
- #define UAMSIZ 100
- struct map *uh_map; /* register free map */
- };
-
- /* given a pointer to uba_regs, find DWBUA registers */
- /* this should be replaced with a union in uba_hd */
- #define BUA(uba) ((struct dwbua_regs *)(uba))
-
- /*
- * 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;
- short um_ctlr; /* controller index in driver */
- short um_ubanum; /* the uba it is on */
- short um_alive; /* controller exists */
- int (**um_intr)(); /* interrupt handler(s) */
- caddr_t um_addr; /* address of device in i/o space */
- struct uba_hd *um_hd;
- /* the driver saves the prototype command here for use in its go routine */
- int um_cmd; /* communication to dgo() */
- int um_ubinfo; /* save unibus registers, etc */
- int um_bdp; /* for controllers that hang on to bdp's */
- struct buf um_tab; /* queue of devices for this controller */
- };
-
- /*
- * Per ``device'' structure.
- * (A controller has devices or uses and releases buffered data paths).
- * (Everything else is a ``device''.)
- *
- * If a controller has many drives attached, then there will
- * be several uba_device structures associated with a single uba_ctlr
- * structure.
- *
- * This structure contains all the information necessary to run
- * a unibus device such as a dz or a dh. It also contains information
- * for slaves of unibus controllers as to which device on the slave
- * this is. A flags field here can also be given in the system specification
- * and is used to tell which dz lines are hard wired or other device
- * specific parameters.
- */
- struct uba_device {
- struct uba_driver *ui_driver;
- short ui_unit; /* unit number on the system */
- short ui_ctlr; /* mass ctlr number; -1 if none */
- short ui_ubanum; /* the uba it is on */
- short ui_slave; /* slave on controller */
- int (**ui_intr)(); /* interrupt handler(s) */
- caddr_t ui_addr; /* address of device in i/o space */
- short ui_dk; /* if init 1 set to number for iostat */
- int ui_flags; /* parameter from system specification */
- short ui_alive; /* device exists */
- short ui_type; /* driver specific type information */
- caddr_t ui_physaddr; /* phys addr, for standalone (dump) code */
- /* this is the forward link in a list of devices on a controller */
- struct uba_device *ui_forw;
- /* if the device is connected to a controller, this is the controller */
- struct uba_ctlr *ui_mi;
- struct uba_hd *ui_hd;
- };
-
- /*
- * Per-driver structure.
- *
- * Each unibus driver defines entries for a set of routines
- * as well as an array of types which are acceptable to it.
- * These are used at boot time by the configuration program.
- */
- struct uba_driver {
- int (*ud_probe)(); /* see if a driver is really there */
- int (*ud_slave)(); /* see if a slave is there */
- int (*ud_attach)(); /* setup driver for a slave */
- int (*ud_dgo)(); /* fill csr/ba to start transfer */
- u_short *ud_addr; /* device csr addresses */
- char *ud_dname; /* name of a device */
- struct uba_device **ud_dinfo; /* backpointers to ubdinit structs */
- char *ud_mname; /* name of a controller */
- struct uba_ctlr **ud_minfo; /* backpointers to ubminit structs */
- short ud_xclu; /* want exclusive use of bdp's */
- short ud_keepbdp; /* hang on to bdp's once allocated */
- int (*ud_ubamem)(); /* see if dedicated memory is present */
- };
- #endif
-
- /*
- * Flags to UBA map/bdp allocation routines
- */
- #define UBA_NEEDBDP 0x01 /* transfer needs a bdp */
- #define UBA_CANTWAIT 0x02 /* don't block me */
- #define UBA_NEED16 0x04 /* need 16 bit addresses only */
- #define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */
-
- /*
- * Macros to bust return word from map allocation routines.
- * SHOULD USE STRUCTURE TO STORE UBA RESOURCE ALLOCATION:
- */
- #ifdef notyet
- struct ubinfo {
- long ub_addr; /* unibus address: mr + boff */
- int ub_nmr; /* number of registers, 0 if empty */
- int ub_bdp; /* bdp number, 0 if none */
- };
- #define UBAI_MR(i) (((i) >> 9) & 0x7ff) /* starting map register */
- #define UBAI_BOFF(i) ((i)&0x1ff) /* page offset */
- #else
- #define UBAI_BDP(i) ((int)(((unsigned)(i)) >> 28))
- #define BDPMASK 0xf0000000
- #define UBAI_NMR(i) ((int)((i) >> 20) & 0xff) /* max 255 (=127.5K) */
- #define UBA_MAXNMR 255
- #define UBAI_MR(i) ((int)((i) >> 9) & 0x7ff) /* max 2047 */
- #define UBA_MAXMR 2047
- #define UBAI_BOFF(i) ((int)((i) & 0x1ff))
- #define UBAI_ADDR(i) ((int)((i) & 0xfffff)) /* uba addr (boff+mr) */
- #define UBAI_INFO(off, mr, nmr, bdp) \
- (((bdp) << 28) | ((nmr) << 20) | ((mr) << 9) | (off))
- #endif
-
- #ifndef LOCORE
- #ifdef KERNEL
- #define ubago(ui) ubaqueue(ui, 0)
-
- /*
- * UBA related kernel variables
- */
- int numuba; /* number of uba's */
- struct uba_hd uba_hd[];
-
- /*
- * Ubminit and ubdinit initialize the mass storage controller and
- * device tables specifying possible devices.
- */
- extern struct uba_ctlr ubminit[];
- extern struct uba_device ubdinit[];
-
- /*
- * UNIBUS device address space is mapped by UMEMmap
- * into virtual address umem[][].
- * The IO page is mapped to the last 8K of each.
- * This should be enlarged for the Q22 bus.
- */
- extern struct pte UMEMmap[][512]; /* uba device addr pte's */
- extern char umem[][512*NBPG]; /* uba device addr space */
-
- /*
- * Since some VAXen vector their unibus interrupts
- * just adjacent to the system control block, we must
- * allocate space there when running on ``any'' cpu. This space is
- * used for the vectors for all ubas.
- */
- extern int (*UNIvec[][128])(); /* unibus vec for ubas */
- extern int (*eUNIvec)(); /* end of unibus vec */
-
- #if defined(VAX780) || defined(VAX8600)
- /*
- * On DW780's, we must set the scb vectors for the nexus of the
- * UNIbus adaptors to vector to locore unibus adaptor interrupt dispatchers
- * which make 780's look like the other VAXen.
- */
- extern Xua0int(), Xua1int(), Xua2int(), Xua3int();
- #endif VAX780
- #endif KERNEL
- #endif !LOCORE
-