1 /* $NetBSD: bus_space.c,v 1.2 2019/12/15 16:48:26 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
9 * Simulation Facility, NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.2 2019/12/15 16:48:26 tsutsui Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38
39 #include <machine/bus.h>
40
41
42 int
ia64_bus_space_map(bus_space_tag_t t,bus_addr_t addr,bus_size_t size,int flags,bus_space_handle_t * bshp)43 ia64_bus_space_map(bus_space_tag_t t, bus_addr_t addr,
44 bus_size_t size, int flags, bus_space_handle_t *bshp)
45 {
46 if (t == IA64_BUS_SPACE_IO) {
47 if (addr > 0xffff)
48 return 1;
49 *bshp = addr;
50 } else {
51 /* t == IA64_BUS_SPACE_MEM */
52
53 if (flags & BUS_SPACE_MAP_CACHEABLE)
54 *bshp = addr + IA64_RR_BASE(7);
55 else
56 *bshp = addr + IA64_RR_BASE(6);
57 }
58
59 return 0;
60 }
61
62 void
ia64_bus_space_unmap(bus_space_tag_t t,bus_space_handle_t bsh,bus_size_t size)63 ia64_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
64 bus_size_t size)
65 {
66 /* nop */
67 }
68
69 int
ia64_bus_space_subregion(bus_space_tag_t t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * bshp)70 ia64_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
71 bus_size_t offset, bus_size_t size, bus_space_handle_t *bshp)
72 {
73 *bshp = bsh + offset;
74 return 0;
75 }
76
77 paddr_t
ia64_bus_space_mmap(bus_space_tag_t t,bus_addr_t addr,off_t offset,int prot,int flags)78 ia64_bus_space_mmap(bus_space_tag_t t, bus_addr_t addr, off_t offset,
79 int prot, int flags)
80 {
81 /* Can't mmap I/O space */
82 if (t == IA64_BUS_SPACE_IO)
83 return -1;
84
85 return addr + offset;
86 }
87
88 int
ia64_bus_space_alloc(bus_space_tag_t t,bus_addr_t reg_start,bus_addr_t reg_end,bus_size_t size,bus_size_t alignment,bus_size_t boundary,int flags,bus_addr_t * addrp,bus_space_handle_t * bshp)89 ia64_bus_space_alloc(bus_space_tag_t t, bus_addr_t reg_start,
90 bus_addr_t reg_end, bus_size_t size, bus_size_t alignment,
91 bus_size_t boundary, int flags, bus_addr_t *addrp, bus_space_handle_t *bshp)
92 {
93 bus_addr_t addr;
94
95 addr = (reg_start + PAGE_SIZE - 1) & ~PAGE_MASK;
96
97 if ((addr % alignment) == 0) {
98 *addrp = addr;
99 *bshp = (bus_space_handle_t)addr;
100 return 0;
101 } else {
102 return 1;
103 }
104 }
105
106 void
ia64_bus_space_free(bus_space_tag_t t,bus_space_handle_t handle,bus_size_t size)107 ia64_bus_space_free(bus_space_tag_t t, bus_space_handle_t handle,
108 bus_size_t size)
109 {
110 /* nop */
111 }
112