1 /* $NetBSD: gemini_space.c,v 1.6 2023/04/21 15:00:48 skrll Exp $ */
2
3 /* adapted from:
4 * NetBSD: pxa2x0_space.c,v 1.8 2005/11/24 13:08:32 yamt Exp
5 */
6
7 /*
8 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
9 * All rights reserved.
10 *
11 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed for the NetBSD Project by
24 * Wasabi Systems, Inc.
25 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
26 * or promote products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 * POSSIBILITY OF SUCH DAMAGE.
40 */
41 /*
42 * Copyright (c) 1997 Mark Brinicombe.
43 * Copyright (c) 1997 Causality Limited.
44 * All rights reserved.
45 *
46 * This code is derived from software contributed to The NetBSD Foundation
47 * by Ichiro FUKUHARA.
48 *
49 * Redistribution and use in source and binary forms, with or without
50 * modification, are permitted provided that the following conditions
51 * are met:
52 * 1. Redistributions of source code must retain the above copyright
53 * notice, this list of conditions and the following disclaimer.
54 * 2. Redistributions in binary form must reproduce the above copyright
55 * notice, this list of conditions and the following disclaimer in the
56 * documentation and/or other materials provided with the distribution.
57 * 3. All advertising materials mentioning features or use of this software
58 * must display the following acknowledgement:
59 * This product includes software developed by Mark Brinicombe.
60 * 4. The name of the company nor the name of the author may be used to
61 * endorse or promote products derived from this software without specific
62 * prior written permission.
63 *
64 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
65 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
66 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
67 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
68 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
69 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
70 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
74 * SUCH DAMAGE.
75 */
76
77 /*
78 * bus_space functions for Gemini processor.
79 */
80
81 #include <sys/cdefs.h>
82 __KERNEL_RCSID(0, "$NetBSD: gemini_space.c,v 1.6 2023/04/21 15:00:48 skrll Exp $");
83
84 #include <sys/param.h>
85 #include <sys/systm.h>
86
87 #include <uvm/uvm_extern.h>
88
89 #include <sys/bus.h>
90
91 /* Prototypes for all the bus_space structure functions */
92 bs_protos(gemini);
93 bs_protos(generic);
94 bs_protos(generic_armv4);
95 bs_protos(bs_notimpl);
96
97 struct bus_space gemini_bs_tag = {
98 /* cookie */
99 .bs_cookie = (void *) 0,
100
101 /* mapping/unmapping */
102 .bs_map = gemini_bs_map,
103 .bs_unmap = gemini_bs_unmap,
104 .bs_subregion = gemini_bs_subregion,
105
106 /* allocation/deallocation */
107 .bs_alloc = gemini_bs_alloc, /* not implemented */
108 .bs_free = gemini_bs_free, /* not implemented */
109
110 /* get kernel virtual address */
111 .bs_vaddr = gemini_bs_vaddr,
112
113 /* mmap */
114 .bs_mmap = bs_notimpl_bs_mmap,
115
116 /* barrier */
117 .bs_barrier = gemini_bs_barrier,
118
119 /* read (single) */
120 .bs_r_1 = generic_bs_r_1,
121 .bs_r_2 = generic_armv4_bs_r_2,
122 .bs_r_4 = generic_bs_r_4,
123 .bs_r_8 = bs_notimpl_bs_r_8,
124
125 /* read multiple */
126 .bs_rm_1 = generic_bs_rm_1,
127 .bs_rm_2 = generic_armv4_bs_rm_2,
128 .bs_rm_4 = generic_bs_rm_4,
129 .bs_rm_8 = bs_notimpl_bs_rm_8,
130
131 /* read region */
132 .bs_rr_1 = generic_bs_rr_1,
133 .bs_rr_2 = generic_armv4_bs_rr_2,
134 .bs_rr_4 = generic_bs_rr_4,
135 .bs_rr_8 = bs_notimpl_bs_rr_8,
136
137 /* write (single) */
138 .bs_w_1 = generic_bs_w_1,
139 .bs_w_2 = generic_armv4_bs_w_2,
140 .bs_w_4 = generic_bs_w_4,
141 .bs_w_8 = bs_notimpl_bs_w_8,
142
143 /* write multiple */
144 .bs_wm_1 = generic_bs_wm_1,
145 .bs_wm_2 = generic_armv4_bs_wm_2,
146 .bs_wm_4 = generic_bs_wm_4,
147 .bs_wm_8 = bs_notimpl_bs_wm_8,
148
149 /* write region */
150 .bs_wr_1 = generic_bs_wr_1,
151 .bs_wr_2 = generic_armv4_bs_wr_2,
152 .bs_wr_4 = generic_bs_wr_4,
153 .bs_wr_8 = bs_notimpl_bs_wr_8,
154
155 /* set multiple */
156 .bs_sm_1 = bs_notimpl_bs_sm_1,
157 .bs_sm_2 = bs_notimpl_bs_sm_2,
158 .bs_sm_4 = bs_notimpl_bs_sm_4,
159 .bs_sm_8 = bs_notimpl_bs_sm_8,
160
161 /* set region */
162 .bs_sr_1 = generic_bs_sr_1,
163 .bs_sr_2 = generic_armv4_bs_sr_2,
164 .bs_sr_4 = bs_notimpl_bs_sr_4,
165 .bs_sr_8 = bs_notimpl_bs_sr_8,
166
167 /* copy */
168 .bs_c_1 = bs_notimpl_bs_c_1,
169 .bs_c_2 = generic_armv4_bs_c_2,
170 .bs_c_4 = bs_notimpl_bs_c_4,
171 .bs_c_8 = bs_notimpl_bs_c_8,
172 };
173
174 int
gemini_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int flag,bus_space_handle_t * bshp)175 gemini_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
176 int flag, bus_space_handle_t *bshp)
177 {
178 const struct pmap_devmap *pd;
179
180 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
181 /* Device was statically mapped. */
182 *bshp = pd->pd_va + (bpa - pd->pd_pa);
183 return 0;
184 }
185
186 paddr_t startpa = trunc_page(bpa);
187 paddr_t endpa = round_page(bpa + size);
188
189 /* XXX use extent manager to check duplicate mapping */
190
191 vaddr_t va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
192 UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
193 if (! va)
194 return(ENOMEM);
195
196 *bshp = (bus_space_handle_t)(va + (bpa - startpa));
197
198 const int pmapflags =
199 (flag & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE))
200 ? 0
201 : PMAP_NOCACHE;
202 for (paddr_t pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
203 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags);
204 }
205 pmap_update(pmap_kernel());
206
207 return(0);
208 }
209
210 void
gemini_bs_unmap(void * t,bus_space_handle_t bsh,bus_size_t size)211 gemini_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
212 {
213 vaddr_t va;
214 vsize_t sz;
215
216 if (pmap_devmap_find_va(bsh, size) != NULL) {
217 /* Device was statically mapped; nothing to do. */
218 return;
219 }
220
221 va = trunc_page(bsh);
222 sz = round_page(bsh + size) - va;
223
224 pmap_kremove(va, sz);
225 pmap_update(pmap_kernel());
226 uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY);
227 }
228
229
230 int
gemini_bs_subregion(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)231 gemini_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
232 bus_size_t size, bus_space_handle_t *nbshp)
233 {
234
235 *nbshp = bsh + offset;
236 return (0);
237 }
238
239 void
gemini_bs_barrier(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)240 gemini_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
241 bus_size_t len, int flags)
242 {
243
244 /* Nothing to do. */
245 }
246
247 void *
gemini_bs_vaddr(void * t,bus_space_handle_t bsh)248 gemini_bs_vaddr(void *t, bus_space_handle_t bsh)
249 {
250
251 return ((void *)bsh);
252 }
253
254
255 int
gemini_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 flags,bus_addr_t * bpap,bus_space_handle_t * bshp)256 gemini_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
257 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
258 bus_addr_t *bpap, bus_space_handle_t *bshp)
259 {
260
261 panic("gemini_io_bs_alloc(): not implemented\n");
262 }
263
264 void
gemini_bs_free(void * t,bus_space_handle_t bsh,bus_size_t size)265 gemini_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
266 {
267
268 panic("gemini_io_bs_free(): not implemented\n");
269 }
270
271