1 /* $OpenBSD: bus_space.c,v 1.2 2014/05/24 21:11:01 miod Exp $ */
2
3 /*
4 * Copyright (c) 2001-2003 Opsycon AB (www.opsycon.se / www.opsycon.com)
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29 /*
30 * Simple generic bus access primitives.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35
36 #include <machine/bus.h>
37
38 uint8_t
generic_space_read_1(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o)39 generic_space_read_1(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o)
40 {
41 return *(volatile uint8_t *)(h + o);
42 }
43
44 uint16_t
generic_space_read_2(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o)45 generic_space_read_2(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o)
46 {
47 return *(volatile uint16_t *)(h + o);
48 }
49
50 uint32_t
generic_space_read_4(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o)51 generic_space_read_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o)
52 {
53 return *(volatile uint32_t *)(h + o);
54 }
55
56 uint64_t
generic_space_read_8(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o)57 generic_space_read_8(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o)
58 {
59 return *(volatile uint64_t *)(h + o);
60 }
61
62 void
generic_space_write_1(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o,uint8_t v)63 generic_space_write_1(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o,
64 uint8_t v)
65 {
66 *(volatile uint8_t *)(h + o) = v;
67 }
68
69 void
generic_space_write_2(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o,uint16_t v)70 generic_space_write_2(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o,
71 uint16_t v)
72 {
73 *(volatile uint16_t *)(h + o) = v;
74 }
75
76 void
generic_space_write_4(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o,uint32_t v)77 generic_space_write_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o,
78 uint32_t v)
79 {
80 *(volatile uint32_t *)(h + o) = v;
81 }
82
83 void
generic_space_write_8(bus_space_tag_t t,bus_space_handle_t h,bus_size_t o,uint64_t v)84 generic_space_write_8(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o,
85 uint64_t v)
86 {
87 *(volatile uint64_t *)(h + o) = v;
88 }
89
90 void
generic_space_read_raw_2(bus_space_tag_t t,bus_space_handle_t h,bus_addr_t o,uint8_t * buf,bus_size_t len)91 generic_space_read_raw_2(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o,
92 uint8_t *buf, bus_size_t len)
93 {
94 volatile uint16_t *addr = (volatile uint16_t *)(h + o);
95 len >>= 1;
96 while (len-- != 0) {
97 *(uint16_t *)buf = *addr;
98 buf += 2;
99 }
100 }
101
102 void
generic_space_write_raw_2(bus_space_tag_t t,bus_space_handle_t h,bus_addr_t o,const uint8_t * buf,bus_size_t len)103 generic_space_write_raw_2(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o,
104 const uint8_t *buf, bus_size_t len)
105 {
106 volatile uint16_t *addr = (volatile uint16_t *)(h + o);
107 len >>= 1;
108 while (len-- != 0) {
109 *addr = *(uint16_t *)buf;
110 buf += 2;
111 }
112 }
113
114 void
generic_space_read_raw_4(bus_space_tag_t t,bus_space_handle_t h,bus_addr_t o,uint8_t * buf,bus_size_t len)115 generic_space_read_raw_4(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o,
116 uint8_t *buf, bus_size_t len)
117 {
118 volatile uint32_t *addr = (volatile uint32_t *)(h + o);
119 len >>= 2;
120 while (len-- != 0) {
121 *(uint32_t *)buf = *addr;
122 buf += 4;
123 }
124 }
125
126 void
generic_space_write_raw_4(bus_space_tag_t t,bus_space_handle_t h,bus_addr_t o,const uint8_t * buf,bus_size_t len)127 generic_space_write_raw_4(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o,
128 const uint8_t *buf, bus_size_t len)
129 {
130 volatile uint32_t *addr = (volatile uint32_t *)(h + o);
131 len >>= 2;
132 while (len-- != 0) {
133 *addr = *(uint32_t *)buf;
134 buf += 4;
135 }
136 }
137
138 void
generic_space_read_raw_8(bus_space_tag_t t,bus_space_handle_t h,bus_addr_t o,uint8_t * buf,bus_size_t len)139 generic_space_read_raw_8(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o,
140 uint8_t *buf, bus_size_t len)
141 {
142 volatile uint64_t *addr = (volatile uint64_t *)(h + o);
143 len >>= 3;
144 while (len-- != 0) {
145 *(uint64_t *)buf = *addr;
146 buf += 8;
147 }
148 }
149
150 void
generic_space_write_raw_8(bus_space_tag_t t,bus_space_handle_t h,bus_addr_t o,const uint8_t * buf,bus_size_t len)151 generic_space_write_raw_8(bus_space_tag_t t, bus_space_handle_t h, bus_addr_t o,
152 const uint8_t *buf, bus_size_t len)
153 {
154 volatile uint64_t *addr = (volatile uint64_t *)(h + o);
155 len >>= 3;
156 while (len-- != 0) {
157 *addr = *(uint64_t *)buf;
158 buf += 8;
159 }
160 }
161
162 int
generic_space_map(bus_space_tag_t t,bus_addr_t offs,bus_size_t size,int flags,bus_space_handle_t * bshp)163 generic_space_map(bus_space_tag_t t, bus_addr_t offs, bus_size_t size,
164 int flags, bus_space_handle_t *bshp)
165 {
166 *bshp = t->bus_base + offs;
167 return 0;
168 }
169
170 void
generic_space_unmap(bus_space_tag_t t,bus_space_handle_t bsh,bus_size_t size)171 generic_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size)
172 {
173 }
174
175 int
generic_space_region(bus_space_tag_t t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)176 generic_space_region(bus_space_tag_t t, bus_space_handle_t bsh,
177 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
178 {
179 *nbshp = bsh + offset;
180 return 0;
181 }
182
183 void *
generic_space_vaddr(bus_space_tag_t t,bus_space_handle_t h)184 generic_space_vaddr(bus_space_tag_t t, bus_space_handle_t h)
185 {
186 return (void *)h;
187 }
188
189 paddr_t
generic_space_mmap(bus_space_tag_t t,bus_addr_t addr,off_t off,int prot,int flags)190 generic_space_mmap(bus_space_tag_t t, bus_addr_t addr, off_t off, int prot,
191 int flags)
192 {
193 return (paddr_t)-1;
194 }
195