/*      $NetBSD: tc_machdep.h,v 1.3 2008/03/11 05:34:02 matt Exp $      */

/*
 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Jonathan Stone, Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

/*
 * Machine-specific definitions for TURBOchannel support.
 *
 * This file must typedef the following types:
 *
 *      tc_addr_t       TURBOchannel bus address
 *      tc_offset_t     TURBOchannel bus address difference (offset)
 *
 * This file must prototype or define the following functions
 * or macros (one or more of which may be no-ops):
 *
 *      tc_mb()         read/write memory barrier (any CPU<->memory
 *                      reads/writes before must complete before any
 *                      CPU<->memory reads/writes after).
 *      tc_wmb()        write memory barrier (any CPU<->memory writes
 *                      before must complete before any CPU<->memory
 *                      writes after).
 *      tc_syncbus()    sync TC bus; make sure CPU writes are
 *                      propagated across the TURBOchannel bus.
 *      tc_badaddr()    return non-zero if the given address is invalid.
 *      TC_DENSE_TO_SPARSE()
 *                      convert the given physical address in
 *                      TURBOchannel dense space to the corresponding
 *                      address in TURBOchannel sparse space.
 *      TC_PHYS_TO_UNCACHED()
 *                      convert the given system memory physical address
 *                      to the physical address of the corresponding
 *                      region that is not cached.
 */

#ifndef _VAX_TC_MACHDEP_H_
#define _VAX_TC_MACHDEP_H_

#include <machine/cpu.h>                /* for badaddr */

typedef uint32_t        tc_addr_t;
typedef uint32_t        tc_offset_t;

#define tc_mb()         do { } while (/*CONSTCOND*/ 0)
#define tc_wmb()        do { } while (/*CONSTCOND*/ 0)
#define tc_syncbus()    do { } while (/*CONSTCOND*/ 0)

#define tc_badaddr(tcaddr) badaddr((void *)(tcaddr), sizeof (uint32_t))

#define TC_DENSE_TO_SPARSE(addr)  (addr)
#define TC_PHYS_TO_UNCACHED(addr) (addr)
#define VAX_PHYS_TO_S0(addr)      ((addr) | KERNBASE)

/*
 * Use the following macros to compare device names on a vax, as
 * the autoconfig structs are in a state of flux.
 */
#define TC_BUS_MATCHNAME(ta, name) \
        (strncmp( (ta)->ta_modname, (name), TC_ROM_LLEN+1) == 0)

#endif /* _VAX_TC_MACHDEP_H_ */