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      1 /* 	$NetBSD: dcr.c,v 1.4 2025/02/27 08:39:54 andvar Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2006 Jachym Holecek
      5  * All rights reserved.
      6  *
      7  * Written for DFC Design, s.r.o.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  *
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  *
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * DCR bus space size & base addresses are hardcoded and runtime-checked,
     34  * so there's no point in maintaining extents etc -- just provide placebo
     35  * implementations so that we can use bus_space as usual (add more as
     36  * needed).
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: dcr.c,v 1.4 2025/02/27 08:39:54 andvar Exp $");
     41 
     42 #include <sys/types.h>
     43 #include <sys/bus.h>
     44 #include <evbppc/virtex/dcr.h>
     45 
     46 int
     47 dcr_map(bus_space_tag_t bst, bus_addr_t addr, bus_size_t size, int flags,
     48     bus_space_handle_t *bsh)
     49 {
     50 	*bsh = addr;
     51 
     52 	return (0);
     53 }
     54 
     55 void
     56 dcr_unmap(bus_space_tag_t bst, bus_space_handle_t bsh, bus_size_t size)
     57 {
     58 	/* Nothing to do. */
     59 }
     60 
     61 int
     62 dcr_subregion(bus_space_tag_t bst, bus_space_handle_t bsh, bus_size_t offset,
     63     bus_size_t size, bus_space_handle_t *bshp)
     64 {
     65 	*bshp = bsh + offset;
     66 
     67 	return (0);
     68 }
     69 
     70 void
     71 dcr_barrier(bus_space_tag_t bst, bus_space_handle_t bsh, bus_size_t offset,
     72     bus_size_t size, int flags)
     73 {
     74 	/* XXX EIEIO? */
     75 }
     76