1 /* $NetBSD: obio_space.c,v 1.17 2023/04/21 14:58:34 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002, 2003 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 /*
39 * bus_space functions for IQ80310 on-board devices
40 */
41
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: obio_space.c,v 1.17 2023/04/21 14:58:34 skrll Exp $");
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47
48 #include <uvm/uvm_extern.h>
49
50 #include <sys/bus.h>
51
52 /* Prototypes for all the bus_space structure functions */
53 bs_protos(obio);
54 bs_protos(generic);
55 bs_protos(bs_notimpl);
56
57 /*
58 * The obio bus space tag. This is constant for all instances, so
59 * we never have to explicitly "create" it.
60 */
61 struct bus_space obio_bs_tag = {
62 /* cookie */
63 .bs_cookie = (void *) 0,
64
65 /* mapping/unmapping */
66 .bs_map = obio_bs_map,
67 .bs_unmap = obio_bs_unmap,
68 .bs_subregion = obio_bs_subregion,
69
70 /* allocation/deallocation */
71 .bs_alloc = obio_bs_alloc,
72 .bs_free = obio_bs_free,
73
74 /* get kernel virtual address */
75 .bs_vaddr = obio_bs_vaddr,
76
77 /* mmap */
78 .bs_mmap = bs_notimpl_bs_mmap,
79
80 /* barrier */
81 .bs_barrier = obio_bs_barrier,
82
83 /* read (single) */
84 .bs_r_1 = generic_bs_r_1,
85 .bs_r_2 = bs_notimpl_bs_r_2,
86 .bs_r_4 = generic_bs_r_4,
87 .bs_r_8 = bs_notimpl_bs_r_8,
88
89 /* read multiple */
90 .bs_rm_1 = generic_bs_rm_1,
91 .bs_rm_2 = bs_notimpl_bs_rm_2,
92 .bs_rm_4 = bs_notimpl_bs_rm_4,
93 .bs_rm_8 = bs_notimpl_bs_rm_8,
94
95 /* read region */
96 .bs_rr_1 = generic_bs_rr_1,
97 .bs_rr_2 = bs_notimpl_bs_rr_2,
98 .bs_rr_4 = bs_notimpl_bs_rr_4,
99 .bs_rr_8 = bs_notimpl_bs_rr_8,
100
101 /* write (single) */
102 .bs_w_1 = generic_bs_w_1,
103 .bs_w_2 = bs_notimpl_bs_w_2,
104 .bs_w_4 = generic_bs_w_4,
105 .bs_w_8 = bs_notimpl_bs_w_8,
106
107 /* write multiple */
108 .bs_wm_1 = generic_bs_wm_1,
109 .bs_wm_2 = bs_notimpl_bs_wm_2,
110 .bs_wm_4 = bs_notimpl_bs_wm_4,
111 .bs_wm_8 = bs_notimpl_bs_wm_8,
112
113 /* write region */
114 .bs_wr_1 = bs_notimpl_bs_wr_1,
115 .bs_wr_2 = bs_notimpl_bs_wr_2,
116 .bs_wr_4 = bs_notimpl_bs_wr_4,
117 .bs_wr_8 = bs_notimpl_bs_wr_8,
118
119 /* set multiple */
120 .bs_sm_1 = bs_notimpl_bs_sm_1,
121 .bs_sm_2 = bs_notimpl_bs_sm_2,
122 .bs_sm_4 = bs_notimpl_bs_sm_4,
123 .bs_sm_8 = bs_notimpl_bs_sm_8,
124
125 /* set region */
126 .bs_sr_1 = bs_notimpl_bs_sr_1,
127 .bs_sr_2 = bs_notimpl_bs_sr_2,
128 .bs_sr_4 = bs_notimpl_bs_sr_4,
129 .bs_sr_8 = bs_notimpl_bs_sr_8,
130
131 /* copy */
132 .bs_c_1 = bs_notimpl_bs_c_1,
133 .bs_c_2 = bs_notimpl_bs_c_2,
134 .bs_c_4 = bs_notimpl_bs_c_4,
135 .bs_c_8 = bs_notimpl_bs_c_8,
136 };
137
138 int
obio_bs_map(void * t,bus_addr_t bpa,bus_size_t size,int flag,bus_space_handle_t * bshp)139 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
140 bus_space_handle_t *bshp)
141 {
142 const struct pmap_devmap *pd;
143 paddr_t startpa, endpa, pa, offset;
144 vaddr_t va;
145
146 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
147 /* Device was statically mapped. */
148 *bshp = pd->pd_va + (bpa - pd->pd_pa);
149 return (0);
150 }
151
152 endpa = round_page(bpa + size);
153 offset = bpa & PAGE_MASK;
154 startpa = trunc_page(bpa);
155
156 va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
157 UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
158 if (va == 0)
159 return(ENOMEM);
160
161 *bshp = va + offset;
162
163 const int pmapflags =
164 (flag & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE))
165 ? 0
166 : PMAP_NOCACHE;
167 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
168 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags);
169 }
170 pmap_update(pmap_kernel());
171
172 return (0);
173 }
174
175 int
obio_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)176 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
177 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
178 bus_space_handle_t *bshp)
179 {
180
181 panic("obio_bs_alloc(): not implemented");
182 }
183
184
185 void
obio_bs_unmap(void * t,bus_space_handle_t bsh,bus_size_t size)186 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
187 {
188 vaddr_t va, endva;
189
190 if (pmap_devmap_find_va(bsh, size) != NULL) {
191 /* Device was statically mapped; nothing to do. */
192 return;
193 }
194
195 endva = round_page(bsh + size);
196 va = trunc_page(bsh);
197
198 pmap_kremove(va, endva - va);
199 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
200 }
201
202 void
obio_bs_free(void * t,bus_space_handle_t bsh,bus_size_t size)203 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
204 {
205
206 panic("obio_bs_free(): not implemented");
207 }
208
209 int
obio_bs_subregion(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t size,bus_space_handle_t * nbshp)210 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
211 bus_size_t size, bus_space_handle_t *nbshp)
212 {
213
214 *nbshp = bsh + offset;
215 return (0);
216 }
217
218 void *
obio_bs_vaddr(void * t,bus_space_handle_t bsh)219 obio_bs_vaddr(void *t, bus_space_handle_t bsh)
220 {
221
222 return ((void *)bsh);
223 }
224
225 void
obio_bs_barrier(void * t,bus_space_handle_t bsh,bus_size_t offset,bus_size_t len,int flags)226 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
227 bus_size_t len, int flags)
228 {
229
230 /* Nothing to do. */
231 }
232