1 /* $NetBSD: footbridge_com_io.c,v 1.10 2021/08/13 11:40:43 skrll Exp $ */
2
3 /*
4 * Copyright (c) 1997 Mark Brinicombe.
5 * Copyright (c) 1997 Causality Limited.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Mark Brinicombe
19 * for the NetBSD Project.
20 * 4. The name of the company nor the name of the author may be used to
21 * endorse or promote products derived from this software without specific
22 * prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 /*
38 * This file provides the bus space tag for the footbridge serial console
39 */
40
41 /*
42 * bus_space I/O functions for mainbus
43 */
44
45 #include <sys/cdefs.h>
46 __KERNEL_RCSID(0, "$NetBSD: footbridge_com_io.c,v 1.10 2021/08/13 11:40:43 skrll Exp $");
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/bus.h>
51
52 /* Proto types for all the bus_space structure functions */
53
54 bs_protos(fcomcons);
55 bs_protos(generic);
56 bs_protos(bs_notimpl);
57
58 /* Declare the fcomcons bus space tag */
59
60 struct bus_space fcomcons_bs_tag = {
61 /* cookie */
62 .bs_cookie = NULL,
63
64 /* mapping/unmapping */
65 .bs_map = fcomcons_bs_map,
66 .bs_unmap = fcomcons_bs_unmap,
67 .bs_subregion = fcomcons_bs_subregion,
68
69 /* allocation/deallocation */
70 .bs_alloc = fcomcons_bs_alloc,
71 .bs_free = fcomcons_bs_free,
72
73 /* get kernel virtual address */
74 .bs_vaddr = 0, /* never used */
75
76 /* Mmap bus space for user */
77 .bs_mmap = bs_notimpl_bs_mmap,
78
79 /* barrier */
80 .bs_barrier = fcomcons_bs_barrier,
81
82 /* read (single) */
83 .bs_r_1 = bs_notimpl_bs_r_1,
84 .bs_r_2 = bs_notimpl_bs_r_2,
85 .bs_r_4 = generic_bs_r_4,
86 .bs_r_8 = bs_notimpl_bs_r_8,
87
88 /* read multiple */
89 .bs_rm_1 = bs_notimpl_bs_rm_1,
90 .bs_rm_2 = bs_notimpl_bs_rm_2,
91 .bs_rm_4 = bs_notimpl_bs_rm_4,
92 .bs_rm_8 = bs_notimpl_bs_rm_8,
93
94 /* read region */
95 .bs_rr_1 = bs_notimpl_bs_rr_1,
96 .bs_rr_2 = bs_notimpl_bs_rr_2,
97 .bs_rr_4 = bs_notimpl_bs_rr_4,
98 .bs_rr_8 = bs_notimpl_bs_rr_8,
99
100 /* write (single) */
101 .bs_w_1 = bs_notimpl_bs_w_1,
102 .bs_w_2 = bs_notimpl_bs_w_2,
103 .bs_w_4 = generic_bs_w_4,
104 .bs_w_8 = bs_notimpl_bs_w_8,
105
106 /* write multiple */
107 .bs_wm_1 = bs_notimpl_bs_wm_1,
108 .bs_wm_2 = bs_notimpl_bs_wm_2,
109 .bs_wm_4 = bs_notimpl_bs_wm_4,
110 .bs_wm_8 = bs_notimpl_bs_wm_8,
111
112 /* write region */
113 .bs_wr_1 = bs_notimpl_bs_wr_1,
114 .bs_wr_2 = bs_notimpl_bs_wr_2,
115 .bs_wr_4 = bs_notimpl_bs_wr_4,
116 .bs_wr_8 = bs_notimpl_bs_wr_8,
117
118 .bs_sm_1 = bs_notimpl_bs_sm_1,
119 .bs_sm_2 = bs_notimpl_bs_sm_2,
120 .bs_sm_4 = bs_notimpl_bs_sm_4,
121 .bs_sm_8 = bs_notimpl_bs_sm_8,
122
123 /* set region */
124 .bs_sr_1 = bs_notimpl_bs_sr_1,
125 .bs_sr_2 = bs_notimpl_bs_sr_2,
126 .bs_sr_4 = bs_notimpl_bs_sr_4,
127 .bs_sr_8 = bs_notimpl_bs_sr_8,
128
129 /* copy */
130 .bs_c_1 = bs_notimpl_bs_c_1,
131 .bs_c_2 = bs_notimpl_bs_c_2,
132 .bs_c_4 = bs_notimpl_bs_c_4,
133 .bs_c_8 = bs_notimpl_bs_c_8,
134 };
135
136 /* bus space functions */
137
138 int
fcomcons_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int cacheable,bus_space_handle_t * bshp)139 fcomcons_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, bus_space_handle_t *bshp)
140 {
141 /*
142 * Temporary implementation as all I/O is already mapped etc.
143 *
144 * Eventually this function will do the mapping check for multiple maps
145 */
146 *bshp = bpa;
147 return(0);
148 }
149
150 int
fcomcons_bs_alloc(void * t,bus_addr_t rstart,bus_addr_t rend,bus_size_t size,bus_size_t alignment,bus_size_t boundary,int cacheable,bus_addr_t * bpap,bus_space_handle_t * bshp)151 fcomcons_bs_alloc(
152 void *t,
153 bus_addr_t rstart,
154 bus_addr_t rend,
155 bus_size_t size,
156 bus_size_t alignment,
157 bus_size_t boundary,
158 int cacheable,
159 bus_addr_t *bpap,
160 bus_space_handle_t *bshp)
161 {
162 panic("fcomcons_alloc(): Help!");
163 }
164
165
166 void
fcomcons_bs_unmap(void * t,bus_space_handle_t bsh,bus_size_t size)167 fcomcons_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
168 {
169 /*
170 * Temporary implementation
171 */
172 }
173
174 void
fcomcons_bs_free(void * t,bus_space_handle_t bsh,bus_size_t size)175 fcomcons_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
176 {
177
178 panic("fcomcons_free(): Help!");
179 /* fcomcons_unmap() does all that we need to do. */
180 /* fcomcons_unmap(t, bsh, size);*/
181 }
182
183 int
fcomcons_bs_subregion(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)184 fcomcons_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
185 {
186
187 *nbshp = bsh + offset;
188 return (0);
189 }
190
191 void
fcomcons_bs_barrier(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)192 fcomcons_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags)
193 {
194 }
195
196 /* End of footbridge_com_io.c */
197