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
bus_space_barrier(bus_space_tag_t space,bus_space_handle_t handle,bus_size_t offset,bus_size_t length,int flags)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
bus_space_mmap(bus_space_tag_t t,bus_addr_t addr,off_t off,int prot,int flags)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 *
bus_space_vaddr(bus_space_tag_t space,bus_space_handle_t handle)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