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      1 /*	$NetBSD: bus.c,v 1.3 2022/02/16 23:49:26 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Radoslaw Kujawa.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /* See simple_busfuncs.c for implementation of bus_space_read/write. */
     33 
     34 #include <sys/param.h>
     35 #include <sys/bus.h>
     36 
     37 void
     38 bus_space_barrier(bus_space_tag_t space, bus_space_handle_t handle,
     39 			bus_size_t offset, bus_size_t length, int flags)
     40 {
     41 /* Only amigappc needs barrier. */
     42 #if defined(__powerpc__)
     43 	asm volatile("eieio" ::: "memory");
     44 #endif
     45 }
     46 
     47 paddr_t
     48 bus_space_mmap(bus_space_tag_t t, bus_addr_t addr, off_t off, int prot,
     49 	int flags)
     50 {
     51 	return MD_BTOP(addr + off);
     52 }
     53 
     54 void *
     55 bus_space_vaddr(bus_space_tag_t space, bus_space_handle_t handle)
     56 {
     57 	void* va;
     58 	va = (void*) handle;
     59 
     60 	return va;
     61 }
     62