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+/* $OpenBSD: ubavar.h,v 1.1 2000/04/27 03:14:49 bjc Exp $ */
+/* $NetBSD: ubavar.h,v 1.26 2000/01/24 02:40:30 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. 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
+ */
+#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 {
+ struct device uh_dev; /* Device struct, autoconfig */
+ SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */
+ void (**uh_reset) __P((int));/* UBA reset function array */
+ int *uh_resarg; /* array of ubareset args */
+ int uh_resno; /* Number of devices to reset */
+ int uh_lastiv; /* last free interrupt vector */
+ int (*uh_errchk) __P((struct uba_softc *));
+ void (*uh_beforescan) __P((struct uba_softc *));
+ void (*uh_afterscan) __P((struct uba_softc *));
+ void (*uh_ubainit) __P((struct uba_softc *));
+ void (*uh_ubapurge) __P((struct uba_softc *, int));
+ short uh_nr; /* Unibus sequential number */
+ 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;
+};
+
+/*
+ * 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 */
+ void *uu_softc; /* Pointer to units softc */
+ int uu_bdp; /* for controllers that hang on to bdp's */
+ int (*uu_ready) __P((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 */
+};
+
+/*
+ * 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;
+ void *ua_icookie; /* Cookie for interrupt establish */
+ /* UBA reset routine, filled in by probe */
+ void (*ua_reset) __P((int));
+ 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 */
+
+/*
+ * Some common defines for all subtypes of U/Q-buses/adapters.
+ */
+#define MAXUBAXFER (63*1024) /* Max transfer size in bytes */
+#define UBAIOSIZE (8*1024) /* 8K I/O space */
+#define ubdevreg(addr) ((addr) & 017777)
+
+#ifdef _KERNEL
+#define b_forw b_hash.le_next /* Nice to have when handling uba queues */
+
+void uba_intr_establish __P((void *, int, void (*)(void *), void *));
+void uba_attach __P((struct uba_softc *, unsigned long));
+void uba_enqueue __P((struct uba_unit *));
+void uba_done __P((struct uba_softc *));
+void ubareset __P((int));
+
+#endif /* _KERNEL */
+
+#endif /* _QBUS_UBAVAR_H */