/* $NetBSD: ubavar.h,v 1.39 2008/03/11 05:34:02 matt Exp $ */
/*
* 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. 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
*/
#ifndef _QBUS_UBAVAR_H
#define _QBUS_UBAVAR_H
/*
* This file contains definitions related to the kernel structures
* for dealing with the unibus adapters.
*
* Each uba has a uba_softc structure.
* Each unibus controller which is not a device has a uba_ctlr structure.
* Each unibus device has a uba_device structure.
*/
/*
* 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_softc {
device_t uh_dev; /* Device struct, autoconfig */
struct evcnt uh_intrcnt; /* interrupt counting */
SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */
SIMPLEQ_HEAD(, uba_reset) uh_resetq; /* ubareset queue */
int uh_lastiv; /* last free interrupt vector */
int (*uh_errchk)(struct uba_softc *);
void (*uh_beforescan)(struct uba_softc *);
void (*uh_afterscan)(struct uba_softc *);
void (*uh_ubainit)(struct uba_softc *);
void (*uh_ubapurge)(struct uba_softc *, int);
short uh_nr; /* Unibus sequential number */
short uh_type; /* Type of bus */
bus_space_tag_t uh_iot; /* Tag for this Unibus */
bus_space_handle_t uh_ioh; /* Handle for I/O space */
bus_dma_tag_t uh_dmat;
char *uh_used; /* I/O addresses used */
};
/*
* Per-controller structure.
* The unit struct is common to both the adapter and the controller
* to which it belongs. It is only used on controllers that handles
* BDP's, and calls the adapter queueing subroutines.
*/
struct uba_unit {
SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
device_t uu_dev; /* unit's device_t */
int uu_bdp; /* for controllers that hang on to bdp's */
int (*uu_ready)(struct uba_unit *);
void *uu_ref; /* Buffer this is related to */
short uu_xclu; /* want exclusive use of bdp's */
short uu_keepbdp; /* hang on to bdp's once allocated */
};
/*
* Reset structure. All devices that needs to be reinitialized
* after an ubareset registers with this struct.
*/
struct uba_reset {
SIMPLEQ_ENTRY(uba_reset) ur_resetq;
void (*ur_reset)(device_t);
device_t ur_dev;
};
/*
* uba_attach_args is used during autoconfiguration. It is sent
* from ubascan() to each (possible) device.
*/
struct uba_attach_args {
bus_space_tag_t ua_iot; /* Tag for this bus I/O-space */
bus_addr_t ua_ioh; /* I/O regs addr */
bus_dma_tag_t ua_dmat; /* DMA tag for this bus'es dma */
struct evcnt *ua_evcnt;
void *ua_icookie; /* Cookie for interrupt establish */
int ua_iaddr; /* Full CSR address of device */
int ua_br; /* IPL this dev interrupted on */
int ua_cvec; /* Vector for this device */
};
/*
* 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 */
#define UBA_DONTQUE 0x10 /* Do not enqueue xfer */
/*
* Type of adapter.
*/
#define UBA_UBA 0 /* Traditional unibus adapter */
#define UBA_MVI 1 /* MVI direct-mapped unibus */
#define UBA_QBUS 2 /* Qbus with map registers */
/*
* Struct for unibus allocation.
*/
struct ubinfo {
bus_dmamap_t ui_dmam;
bus_dma_segment_t ui_seg;
int ui_rseg;
void *ui_vaddr;
bus_addr_t ui_baddr;
bus_size_t ui_size;
};
/*
* Some common defines for all subtypes of U/Q-buses/adapters.
*/
#define MAXUBAXFER (63*1024) /* Max transfer size in bytes */
#define ubdevreg(addr) ((addr) & 017777)
