1 /* $NetBSD: pxa2x0_space.c,v 1.14 2023/04/21 15:00:48 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37 /*
38 * Copyright (c) 1997 Mark Brinicombe.
39 * Copyright (c) 1997 Causality Limited.
40 * All rights reserved.
41 *
42 * This code is derived from software contributed to The NetBSD Foundation
43 * by Ichiro FUKUHARA.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. All advertising materials mentioning features or use of this software
54 * must display the following acknowledgement:
55 * This product includes software developed by Mark Brinicombe.
56 * 4. The name of the company nor the name of the author may be used to
57 * endorse or promote products derived from this software without specific
58 * prior written permission.
59 *
60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
61 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
62 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
63 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
64 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
65 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
66 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * SUCH DAMAGE.
71 */
72
73 /*
74 * bus_space functions for Intel PXA2[51]0 application processor.
75 * Derived from i80321_space.c.
76 */
77
78 #include <sys/cdefs.h>
79 __KERNEL_RCSID(0, "$NetBSD: pxa2x0_space.c,v 1.14 2023/04/21 15:00:48 skrll Exp $");
80
81 #include <sys/param.h>
82 #include <sys/systm.h>
83
84 #include <uvm/uvm_extern.h>
85
86 #include <sys/bus.h>
87
88 /* Prototypes for all the bus_space structure functions */
89 bs_protos(pxa2x0);
90 bs_protos(generic);
91 bs_protos(generic_armv4);
92 bs_protos(bs_notimpl);
93
94 struct bus_space pxa2x0_bs_tag = {
95 /* cookie */
96 .bs_cookie = (void *) 0,
97
98 /* mapping/unmapping */
99 .bs_map = pxa2x0_bs_map,
100 .bs_unmap = pxa2x0_bs_unmap,
101 .bs_subregion = pxa2x0_bs_subregion,
102
103 /* allocation/deallocation */
104 .bs_alloc = pxa2x0_bs_alloc, /* not implemented */
105 .bs_free = pxa2x0_bs_free, /* not implemented */
106
107 /* get kernel virtual address */
108 .bs_vaddr = pxa2x0_bs_vaddr,
109
110 /* mmap */
111 .bs_mmap = bs_notimpl_bs_mmap,
112
113 /* barrier */
114 .bs_barrier = pxa2x0_bs_barrier,
115
116 /* read (single) */
117 .bs_r_1 = generic_bs_r_1,
118 .bs_r_2 = generic_armv4_bs_r_2,
119 .bs_r_4 = generic_bs_r_4,
120 .bs_r_8 = bs_notimpl_bs_r_8,
121
122 /* read multiple */
123 .bs_rm_1 = generic_bs_rm_1,
124 .bs_rm_2 = generic_armv4_bs_rm_2,
125 .bs_rm_4 = generic_bs_rm_4,
126 .bs_rm_8 = bs_notimpl_bs_rm_8,
127
128 /* read region */
129 .bs_rr_1 = generic_bs_rr_1,
130 .bs_rr_2 = generic_armv4_bs_rr_2,
131 .bs_rr_4 = generic_bs_rr_4,
132 .bs_rr_8 = bs_notimpl_bs_rr_8,
133
134 /* write (single) */
135 .bs_w_1 = generic_bs_w_1,
136 .bs_w_2 = generic_armv4_bs_w_2,
137 .bs_w_4 = generic_bs_w_4,
138 .bs_w_8 = bs_notimpl_bs_w_8,
139
140 /* write multiple */
141 .bs_wm_1 = generic_bs_wm_1,
142 .bs_wm_2 = generic_armv4_bs_wm_2,
143 .bs_wm_4 = generic_bs_wm_4,
144 .bs_wm_8 = bs_notimpl_bs_wm_8,
145
146 /* write region */
147 .bs_wr_1 = generic_bs_wr_1,
148 .bs_wr_2 = generic_armv4_bs_wr_2,
149 .bs_wr_4 = generic_bs_wr_4,
150 .bs_wr_8 = bs_notimpl_bs_wr_8,
151
152 /* set multiple */
153 .bs_sm_1 = bs_notimpl_bs_sm_1,
154 .bs_sm_2 = bs_notimpl_bs_sm_2,
155 .bs_sm_4 = bs_notimpl_bs_sm_4,
156 .bs_sm_8 = bs_notimpl_bs_sm_8,
157
158 /* set region */
159 .bs_sr_1 = generic_bs_sr_1,
160 .bs_sr_2 = generic_armv4_bs_sr_2,
161 .bs_sr_4 = bs_notimpl_bs_sr_4,
162 .bs_sr_8 = bs_notimpl_bs_sr_8,
163
164 /* copy */
165 .bs_c_1 = bs_notimpl_bs_c_1,
166 .bs_c_2 = generic_armv4_bs_c_2,
167 .bs_c_4 = bs_notimpl_bs_c_4,
168 .bs_c_8 = bs_notimpl_bs_c_8,
169 };
170
171 int
pxa2x0_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int flag,bus_space_handle_t * bshp)172 pxa2x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
173 int flag, bus_space_handle_t *bshp)
174 {
175 u_long startpa, endpa, pa;
176 vaddr_t va;
177 const struct pmap_devmap *pd;
178
179 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
180 /* Device was statically mapped. */
181 *bshp = pd->pd_va + (bpa - pd->pd_pa);
182 return 0;
183 }
184
185 startpa = trunc_page(bpa);
186 endpa = round_page(bpa + size);
187
188 /* XXX use extent manager to check duplicate mapping */
189
190 va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
191 UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
192 if (! va)
193 return(ENOMEM);
194
195 *bshp = (bus_space_handle_t)(va + (bpa - startpa));
196
197 const int pmapflags =
198 (flag & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE))
199 ? 0
200 : PMAP_NOCACHE;
201
202 for (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
pxa2x0_bs_unmap(void * t,bus_space_handle_t bsh,bus_size_t size)211 pxa2x0_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
pxa2x0_bs_subregion(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)231 pxa2x0_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
pxa2x0_bs_barrier(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)240 pxa2x0_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 *
pxa2x0_bs_vaddr(void * t,bus_space_handle_t bsh)248 pxa2x0_bs_vaddr(void *t, bus_space_handle_t bsh)
249 {
250
251 return ((void *)bsh);
252 }
253
254
255 int
pxa2x0_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 pxa2x0_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("pxa2x0_io_bs_alloc(): not implemented\n");
262 }
263
264 void
pxa2x0_bs_free(void * t,bus_space_handle_t bsh,bus_size_t size)265 pxa2x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
266 {
267
268 panic("pxa2x0_io_bs_free(): not implemented\n");
269 }
270
271