1 /*	$NetBSD: footbridge_com_io.c,v 1.4 2002/09/27 15:35:44 provos 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/param.h>
46 #include <sys/systm.h>
47 #include <machine/bus.h>
48 
49 /* Proto types for all the bus_space structure functions */
50 
51 bs_protos(fcomcons);
52 bs_protos(generic);
53 bs_protos(bs_notimpl);
54 
55 /* Declare the fcomcons bus space tag */
56 
57 struct bus_space fcomcons_bs_tag = {
58 	/* cookie */
59 	NULL,
60 
61 	/* mapping/unmapping */
62 	fcomcons_bs_map,
63 	fcomcons_bs_unmap,
64 	fcomcons_bs_subregion,
65 
66 	/* allocation/deallocation */
67 	fcomcons_bs_alloc,
68 	fcomcons_bs_free,
69 
70 	/* get kernel virtual address */
71 	0, /* never used */
72 
73 	/* Mmap bus space for user */
74 	bs_notimpl_bs_mmap,
75 
76 	/* barrier */
77 	fcomcons_bs_barrier,
78 
79 	/* read (single) */
80 	bs_notimpl_bs_r_1,
81 	bs_notimpl_bs_r_2,
82 	generic_bs_r_4,
83 	bs_notimpl_bs_r_8,
84 
85 	/* read multiple */
86 	bs_notimpl_bs_rm_1,
87 	bs_notimpl_bs_rm_2,
88 	bs_notimpl_bs_rm_4,
89 	bs_notimpl_bs_rm_8,
90 
91 	/* read region */
92 	bs_notimpl_bs_rr_1,
93 	bs_notimpl_bs_rr_2,
94 	bs_notimpl_bs_rr_4,
95 	bs_notimpl_bs_rr_8,
96 
97 	/* write (single) */
98 	bs_notimpl_bs_w_1,
99 	bs_notimpl_bs_w_2,
100 	generic_bs_w_4,
101 	bs_notimpl_bs_w_8,
102 
103 	/* write multiple */
104 	bs_notimpl_bs_wm_1,
105 	bs_notimpl_bs_wm_2,
106 	bs_notimpl_bs_wm_4,
107 	bs_notimpl_bs_wm_8,
108 
109 	/* write region */
110 	bs_notimpl_bs_wr_1,
111 	bs_notimpl_bs_wr_2,
112 	bs_notimpl_bs_wr_4,
113 	bs_notimpl_bs_wr_8,
114 
115 	bs_notimpl_bs_sm_1,
116 	bs_notimpl_bs_sm_2,
117 	bs_notimpl_bs_sm_4,
118 	bs_notimpl_bs_sm_8,
119 
120 	/* set region */
121 	bs_notimpl_bs_sr_1,
122 	bs_notimpl_bs_sr_2,
123 	bs_notimpl_bs_sr_4,
124 	bs_notimpl_bs_sr_8,
125 
126 	/* copy */
127 	bs_notimpl_bs_c_1,
128 	bs_notimpl_bs_c_2,
129 	bs_notimpl_bs_c_4,
130 	bs_notimpl_bs_c_8,
131 };
132 
133 /* bus space functions */
134 
135 int
136 fcomcons_bs_map(t, bpa, size, cacheable, bshp)
137 	void *t;
138 	bus_addr_t bpa;
139 	bus_size_t size;
140 	int cacheable;
141 	bus_space_handle_t *bshp;
142 {
143 	/*
144 	 * Temporary implementation as all I/O is already mapped etc.
145 	 *
146 	 * Eventually this function will do the mapping check for multiple maps
147 	 */
148 	*bshp = bpa;
149 	return(0);
150 	}
151 
152 int
153 fcomcons_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
154     bpap, bshp)
155 	void *t;
156 	bus_addr_t rstart, rend;
157 	bus_size_t size, alignment, 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
167 fcomcons_bs_unmap(t, bsh, size)
168 	void *t;
169 	bus_space_handle_t bsh;
170 	bus_size_t size;
171 {
172 	/*
173 	 * Temporary implementation
174 	 */
175 }
176 
177 void
178 fcomcons_bs_free(t, bsh, size)
179 	void *t;
180 	bus_space_handle_t bsh;
181 	bus_size_t size;
182 {
183 
184 	panic("fcomcons_free(): Help!");
185 	/* fcomcons_unmap() does all that we need to do. */
186 /*	fcomcons_unmap(t, bsh, size);*/
187 }
188 
189 int
190 fcomcons_bs_subregion(t, bsh, offset, size, nbshp)
191 	void *t;
192 	bus_space_handle_t bsh;
193 	bus_size_t offset, size;
194 	bus_space_handle_t *nbshp;
195 {
196 
197 	*nbshp = bsh + offset;
198 	return (0);
199 }
200 
201 void
202 fcomcons_bs_barrier(t, bsh, offset, len, flags)
203 	void *t;
204 	bus_space_handle_t bsh;
205 	bus_size_t offset, len;
206 	int flags;
207 {
208 }
209 
210 /* End of footbridge_com_io.c */
211