144 lines
5.8 KiB
C
144 lines
5.8 KiB
C
/* $NetBSD: ubavar.h,v 1.25 1999/06/06 19:14:49 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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/*
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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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SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */
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void (**uh_reset) __P((int));/* UBA reset function array */
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int *uh_resarg; /* array of ubareset args */
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int uh_resno; /* Number of devices to reset */
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int uh_lastiv; /* last free interrupt vector */
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int (*uh_errchk) __P((struct uba_softc *));
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void (*uh_beforescan) __P((struct uba_softc *));
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void (*uh_afterscan) __P((struct uba_softc *));
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void (*uh_ubainit) __P((struct uba_softc *));
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void (*uh_ubapurge) __P((struct uba_softc *, int));
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short uh_nr; /* Unibus sequential number */
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bus_space_tag_t uh_iot; /* Tag for this Unibus */
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bus_space_handle_t uh_ioh; /* Handle for I/O space */
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bus_dma_tag_t uh_dmat;
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};
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/*
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* Per-controller structure.
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* The unit struct is common to both the adapter and the controller
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* to which it belongs. It is only used on controllers that handles
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* BDP's, and calls the adapter queueing subroutines.
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*/
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struct uba_unit {
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SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
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void *uu_softc; /* Pointer to units softc */
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int uu_bdp; /* for controllers that hang on to bdp's */
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int (*uu_ready) __P((struct uba_unit *));
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void *uu_ref; /* Buffer this is related to */
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short uu_xclu; /* want exclusive use of bdp's */
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short uu_keepbdp; /* hang on to bdp's once allocated */
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};
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/*
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* uba_attach_args is used during autoconfiguration. It is sent
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* from ubascan() to each (possible) device.
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*/
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struct uba_attach_args {
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bus_space_tag_t ua_iot; /* Tag for this bus I/O-space */
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bus_addr_t ua_ioh; /* I/O regs addr */
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bus_dma_tag_t ua_dmat;
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/* Pointer to int routine, filled in by probe*/
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void (*ua_ivec) __P((int));
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/* UBA reset routine, filled in by probe */
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void (*ua_reset) __P((int));
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int ua_iaddr; /* Full CSR address of device */
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int ua_br; /* IPL this dev interrupted on */
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int ua_cvec; /* Vector for this device */
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};
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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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#define UBA_DONTQUE 0x10 /* Do not enqueue xfer */
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/*
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* Some common defines for all subtypes of U/Q-buses/adapters.
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*/
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#define MAXUBAXFER (63*1024) /* Max transfer size in bytes */
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#define UBAIOSIZE (8*1024) /* 8K I/O space */
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#define ubdevreg(addr) ((addr) & 017777)
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#ifdef _KERNEL
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#define b_forw b_hash.le_next /* Nice to have when handling uba queues */
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void uba_attach __P((struct uba_softc *, unsigned long));
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void uba_enqueue __P((struct uba_unit *));
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void uba_done __P((struct uba_softc *));
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void ubareset __P((int));
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#endif /* _KERNEL */
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