1 /* $Id: imx23_space.c,v 1.3 2018/03/16 17:56:31 ryo 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 Petri Laakso.
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 * bus_space(9) support for Freescale i.MX23 processor.
34 */
35
36 #include <sys/param.h>
37 #include <sys/bus.h>
38 #include <sys/mutex.h>
39 #include <uvm/uvm_prot.h>
40 #include <machine/pcb.h>
41 #include <uvm/uvm_pmap.h>
42 #include <machine/bus_defs.h>
43 #include <machine/pmap.h>
44
45
46 int imx23_bs_map(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *);
47 void imx23_bs_unmap(void *, bus_space_handle_t, bus_size_t);
48 int imx23_bs_subregion(void *, bus_space_handle_t, bus_size_t, bus_size_t,
49 bus_space_handle_t *);
50 int imx23_bs_alloc(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t,
51 bus_size_t, int, bus_addr_t *, bus_space_handle_t *);
52 void imx23_bs_free(void *, bus_space_handle_t, bus_size_t);
53 void * imx23_bs_vaddr(void *, bus_space_handle_t);
54 paddr_t imx23_bs_mmap(void *, bus_addr_t, off_t, int, int);
55 void imx23_bs_barrier(void *, bus_space_handle_t, bus_size_t,
56 bus_size_t, int);
57
58 bs_protos(bs_notimpl);
59 bs_protos(generic);
60 bs_protos(generic_armv4);
61
62 /* Describes bus space on i.MX23 */
63 struct bus_space imx23_bus_space = {
64 /* cookie */
65 .bs_cookie = (void *) 0,
66
67 /* mapping/unmapping */
68 .bs_map = imx23_bs_map,
69 .bs_unmap = imx23_bs_unmap,
70 .bs_subregion = imx23_bs_subregion,
71
72 /* allocation/deallocation */
73 .bs_alloc = imx23_bs_alloc,
74 .bs_free = imx23_bs_free,
75
76 /* get kernel virtual address */
77 .bs_vaddr = imx23_bs_vaddr,
78
79 /* mmap bus space for user */
80 .bs_mmap = imx23_bs_mmap,
81
82 /* barrier */
83 .bs_barrier = imx23_bs_barrier,
84
85 /* read (single) */
86 .bs_r_1 = generic_bs_r_1,
87 .bs_r_2 = generic_armv4_bs_r_2,
88 .bs_r_4 = generic_bs_r_4,
89 .bs_r_8 = bs_notimpl_bs_r_8,
90
91 /* read multiple */
92 .bs_rm_1 = generic_bs_rm_1,
93 .bs_rm_2 = generic_armv4_bs_rm_2,
94 .bs_rm_4 = generic_bs_rm_4,
95 .bs_rm_8 = bs_notimpl_bs_rm_8,
96
97 /* read region */
98 .bs_rr_1 = generic_bs_rr_1,
99 .bs_rr_2 = generic_armv4_bs_rr_2,
100 .bs_rr_4 = generic_bs_rr_4,
101 .bs_rr_8 = bs_notimpl_bs_rr_8,
102
103 /* write (single) */
104 .bs_w_1 = generic_bs_w_1,
105 .bs_w_2 = generic_armv4_bs_w_2,
106 .bs_w_4 = generic_bs_w_4,
107 .bs_w_8 = bs_notimpl_bs_w_8,
108
109 /* write multiple */
110 .bs_wm_1 = generic_bs_wm_1,
111 .bs_wm_2 = generic_armv4_bs_wm_2,
112 .bs_wm_4 = generic_bs_wm_4,
113 .bs_wm_8 = bs_notimpl_bs_wm_8,
114
115 /* write region */
116 .bs_wr_1 = generic_bs_wr_1,
117 .bs_wr_2 = generic_armv4_bs_wr_2,
118 .bs_wr_4 = generic_bs_wr_4,
119 .bs_wr_8 = bs_notimpl_bs_wr_8,
120
121 /* set multiple */
122 .bs_sm_1 = bs_notimpl_bs_sm_1,
123 .bs_sm_2 = bs_notimpl_bs_sm_2,
124 .bs_sm_4 = bs_notimpl_bs_sm_4,
125 .bs_sm_8 = bs_notimpl_bs_sm_8,
126
127 /* set region */
128 .bs_sr_1 = generic_bs_sr_1,
129 .bs_sr_2 = generic_armv4_bs_sr_2,
130 .bs_sr_4 = generic_bs_sr_4,
131 .bs_sr_8 = bs_notimpl_bs_sr_8,
132
133 /* copy */
134 .bs_c_1 = bs_notimpl_bs_c_1,
135 .bs_c_2 = generic_armv4_bs_c_2,
136 .bs_c_4 = bs_notimpl_bs_c_4,
137 .bs_c_8 = bs_notimpl_bs_c_8
138 };
139
140 int
imx23_bs_map(void * space,bus_addr_t address,bus_size_t size,int flags,bus_space_handle_t * handlep)141 imx23_bs_map(void *space, bus_addr_t address, bus_size_t size,
142 int flags, bus_space_handle_t *handlep)
143 {
144 const struct pmap_devmap *pd;
145
146 if ((pd = pmap_devmap_find_pa(address, size)) != NULL) {
147 /* Device was statically mapped. */
148 *handlep = pd->pd_va + (address - pd->pd_pa);
149 return 0;
150 }
151
152 return 0;
153 }
154
155 void
imx23_bs_unmap(void * space,bus_space_handle_t handle,bus_size_t size)156 imx23_bs_unmap(void *space, bus_space_handle_t handle, bus_size_t size)
157 {
158 if (pmap_devmap_find_va(handle, size) != NULL) {
159 /* Device was statically mapped. */
160 return;
161 }
162
163 return;
164 }
165
166 int
imx23_bs_subregion(void * space,bus_space_handle_t handle,bus_size_t offset,bus_size_t size,bus_space_handle_t * nhandlep)167 imx23_bs_subregion(void *space, bus_space_handle_t handle,
168 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep)
169 {
170 *nhandlep = handle + offset;
171 return 0;
172 }
173
174 int
imx23_bs_alloc(void * space,bus_addr_t reg_start,bus_addr_t reg_end,bus_size_t size,bus_size_t alignment,bus_size_t boundary,int flags,bus_addr_t * addrp,bus_space_handle_t * handlep)175 imx23_bs_alloc(void *space, bus_addr_t reg_start, bus_addr_t reg_end,
176 bus_size_t size, bus_size_t alignment,
177 bus_size_t boundary, int flags, bus_addr_t *addrp,
178 bus_space_handle_t *handlep)
179 {
180 return 0;
181 }
182
183 void
imx23_bs_free(void * space,bus_space_handle_t handle,bus_size_t size)184 imx23_bs_free(void *space, bus_space_handle_t handle, bus_size_t size)
185 {
186 return;
187 }
188
189 void *
imx23_bs_vaddr(void * space,bus_space_handle_t handle)190 imx23_bs_vaddr(void *space, bus_space_handle_t handle)
191 {
192 return (void *)0;
193 }
194
195 paddr_t
imx23_bs_mmap(void * space,bus_addr_t addr,off_t off,int prot,int flags)196 imx23_bs_mmap(void *space, bus_addr_t addr, off_t off, int prot,
197 int flags)
198 {
199 return (paddr_t)0;
200 }
201
202 void
imx23_bs_barrier(void * space,bus_space_handle_t handle,bus_size_t offset,bus_size_t length,int flags)203 imx23_bs_barrier(void *space, bus_space_handle_t handle,
204 bus_size_t offset,
205 bus_size_t length, int flags)
206 {
207 return;
208 }
209