1 /* $NetBSD: bcmgen_space.c,v 1.8 2023/04/21 15:00:48 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Nick Hudson
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: bcmgen_space.c,v 1.8 2023/04/21 15:00:48 skrll Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38
39 #include <uvm/uvm_extern.h>
40
41 #include <sys/bus.h>
42 #include <sys/endian.h>
43
44 /* Prototypes for all the bus_space structure functions */
45 bs_protos(bcmgen);
46 bs_protos(generic);
47 bs_protos(generic_armv4);
48 bs_protos(bs_notimpl);
49
50 #if BYTE_ORDER == BIG_ENDIAN
51 #define NSWAP(n) n ## _swap
52 #else
53 #define NSWAP(n) n
54 #endif
55
56 struct bus_space bcmgen_bs_tag = {
57 /* cookie */
58 .bs_cookie = (void *) 0,
59
60 /* mapping/unmapping */
61 .bs_map = bcmgen_bs_map,
62 .bs_unmap = bcmgen_bs_unmap,
63 .bs_subregion = bcmgen_bs_subregion,
64
65 /* allocation/deallocation */
66 .bs_alloc = bcmgen_bs_alloc, /* not implemented */
67 .bs_free = bcmgen_bs_free, /* not implemented */
68
69 /* get kernel virtual address */
70 .bs_vaddr = bcmgen_bs_vaddr,
71
72 /* mmap */
73 .bs_mmap = bs_notimpl_bs_mmap,
74
75 /* barrier */
76 .bs_barrier = bcmgen_bs_barrier,
77
78 /* read (single) */
79 .bs_r_1 = generic_bs_r_1,
80 .bs_r_2 = NSWAP(generic_armv4_bs_r_2),
81 .bs_r_4 = NSWAP(generic_bs_r_4),
82 .bs_r_8 = bs_notimpl_bs_r_8,
83
84 /* read multiple */
85 .bs_rm_1 = generic_bs_rm_1,
86 .bs_rm_2 = NSWAP(generic_armv4_bs_rm_2),
87 .bs_rm_4 = NSWAP(generic_bs_rm_4),
88 .bs_rm_8 = bs_notimpl_bs_rm_8,
89
90 /* read region */
91 .bs_rr_1 = generic_bs_rr_1,
92 .bs_rr_2 = NSWAP(generic_armv4_bs_rr_2),
93 .bs_rr_4 = NSWAP(generic_bs_rr_4),
94 .bs_rr_8 = bs_notimpl_bs_rr_8,
95
96 /* write (single) */
97 .bs_w_1 = generic_bs_w_1,
98 .bs_w_2 = NSWAP(generic_armv4_bs_w_2),
99 .bs_w_4 = NSWAP(generic_bs_w_4),
100 .bs_w_8 = bs_notimpl_bs_w_8,
101
102 /* write multiple */
103 .bs_wm_1 = generic_bs_wm_1,
104 .bs_wm_2 = NSWAP(generic_armv4_bs_wm_2),
105 .bs_wm_4 = NSWAP(generic_bs_wm_4),
106 .bs_wm_8 = bs_notimpl_bs_wm_8,
107
108 /* write region */
109 .bs_wr_1 = generic_bs_wr_1,
110 .bs_wr_2 = NSWAP(generic_armv4_bs_wr_2),
111 .bs_wr_4 = NSWAP(generic_bs_wr_4),
112 .bs_wr_8 = bs_notimpl_bs_wr_8,
113
114 /* set multiple */
115 .bs_sm_1 = bs_notimpl_bs_sm_1,
116 .bs_sm_2 = bs_notimpl_bs_sm_2,
117 .bs_sm_4 = bs_notimpl_bs_sm_4,
118 .bs_sm_8 = bs_notimpl_bs_sm_8,
119
120 /* set region */
121 .bs_sr_1 = generic_bs_sr_1,
122 .bs_sr_2 = NSWAP(generic_armv4_bs_sr_2),
123 .bs_sr_4 = bs_notimpl_bs_sr_4,
124 .bs_sr_8 = bs_notimpl_bs_sr_8,
125
126 /* copy */
127 .bs_c_1 = bs_notimpl_bs_c_1,
128 .bs_c_2 = generic_armv4_bs_c_2,
129 .bs_c_4 = bs_notimpl_bs_c_4,
130 .bs_c_8 = bs_notimpl_bs_c_8,
131
132 #ifdef __BUS_SPACE_HAS_STREAM_METHODS
133 /* read (single) */
134 .bs_r_1_s = generic_bs_r_1,
135 .bs_r_2_s = NSWAP(generic_armv4_bs_r_2),
136 .bs_r_4_s = NSWAP(generic_bs_r_4),
137 .bs_r_8_s = bs_notimpl_bs_r_8,
138
139 /* read multiple */
140 .bs_rm_1_s = generic_bs_rm_1,
141 .bs_rm_2_s = NSWAP(generic_armv4_bs_rm_2),
142 .bs_rm_4_s = NSWAP(generic_bs_rm_4),
143 .bs_rm_8_s = bs_notimpl_bs_rm_8,
144
145 /* read region */
146 .bs_rr_1_s = generic_bs_rr_1,
147 .bs_rr_2_s = NSWAP(generic_armv4_bs_rr_2),
148 .bs_rr_4_s = NSWAP(generic_bs_rr_4),
149 .bs_rr_8_s = bs_notimpl_bs_rr_8,
150
151 /* write (single) */
152 .bs_w_1_s = generic_bs_w_1,
153 .bs_w_2_s = NSWAP(generic_armv4_bs_w_2),
154 .bs_w_4_s = NSWAP(generic_bs_w_4),
155 .bs_w_8_s = bs_notimpl_bs_w_8,
156
157 /* write multiple */
158 .bs_wm_1_s = generic_bs_wm_1,
159 .bs_wm_2_s = NSWAP(generic_armv4_bs_wm_2),
160 .bs_wm_4_s = NSWAP(generic_bs_wm_4),
161 .bs_wm_8_s = bs_notimpl_bs_wm_8,
162
163 /* write region */
164 .bs_wr_1_s = generic_bs_wr_1,
165 .bs_wr_2_s = NSWAP(generic_armv4_bs_wr_2),
166 .bs_wr_4_s = NSWAP(generic_bs_wr_4),
167 .bs_wr_8_s = bs_notimpl_bs_wr_8,
168 #endif
169 };
170
171 int
bcmgen_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int flag,bus_space_handle_t * bshp)172 bcmgen_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
173 bus_space_handle_t *bshp)
174 {
175 u_long startpa, endpa, pa;
176 const struct pmap_devmap *pd;
177 vaddr_t va;
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 | UVM_KMF_COLORMATCH);
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 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
202 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags);
203 }
204 pmap_update(pmap_kernel());
205
206 return 0;
207 }
208
209 void
bcmgen_bs_unmap(void * t,bus_space_handle_t bsh,bus_size_t size)210 bcmgen_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
211 {
212 vaddr_t va;
213 vsize_t sz;
214
215 if (pmap_devmap_find_va(bsh, size) != NULL) {
216 /* Device was statically mapped; nothing to do. */
217 return;
218 }
219
220 va = trunc_page(bsh);
221 sz = round_page(bsh + size) - va;
222
223 pmap_kremove(va, sz);
224 pmap_update(pmap_kernel());
225 uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY);
226 }
227
228
229 int
bcmgen_bs_subregion(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)230 bcmgen_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
231 bus_size_t size, bus_space_handle_t *nbshp)
232 {
233
234 *nbshp = bsh + offset;
235 return (0);
236 }
237
238 void
bcmgen_bs_barrier(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)239 bcmgen_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
240 bus_size_t len, int flags)
241 {
242 flags &= BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE;
243
244 if (flags)
245 dsb(sy);
246 }
247
248 void *
bcmgen_bs_vaddr(void * t,bus_space_handle_t bsh)249 bcmgen_bs_vaddr(void *t, bus_space_handle_t bsh)
250 {
251
252 return (void *)bsh;
253 }
254
255 paddr_t
bcmgen_bs_mmap(void * t,bus_addr_t bpa,off_t offset,int prot,int flags)256 bcmgen_bs_mmap(void *t, bus_addr_t bpa, off_t offset, int prot, int flags)
257 {
258 paddr_t bus_flags = 0;
259
260 if (flags & BUS_SPACE_MAP_PREFETCHABLE)
261 bus_flags |= ARM32_MMAP_WRITECOMBINE;
262
263 return (arm_btop(bpa + offset) | bus_flags);
264 }
265
266 int
bcmgen_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)267 bcmgen_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
268 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
269 bus_addr_t *bpap, bus_space_handle_t *bshp)
270 {
271
272 panic("%s(): not implemented\n", __func__);
273 }
274
275 void
bcmgen_bs_free(void * t,bus_space_handle_t bsh,bus_size_t size)276 bcmgen_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
277 {
278
279 panic("%s(): not implemented\n", __func__);
280 }
281