sys/arch/acorn32/podulebus/podulebus_io.c

   1 /*      $NetBSD: podulebus_io.c,v 1.5 2009/03/14 21:04:01 dsl Exp $     */
   2
   3 /*
   4  * Copyright (c) 1997 Mark Brinicombe.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Mark Brinicombe.
  18  * 4. The name of the company nor the name of the author may be used to
  19  *    endorse or promote products derived from this software without specific
  20  *    prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /*
  36  * bus_space I/O functions for podulebus
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __KERNEL_RCSID(0, "$NetBSD: podulebus_io.c,v 1.5 2009/03/14 21:04:01 dsl Exp $");
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <machine/bus.h>
  45
  46 /* Proto types for all the bus_space structure functions */
  47
  48 bs_protos(podulebus);
  49 bs_protos(bs_notimpl);
  50
  51 /* Declare the podulebus bus space tag */
  52
  53 struct bus_space podulebus_bs_tag = {
  54         /* cookie */
  55         (void *) 2,                     /* Shift to apply to registers */
  56
  57         /* mapping/unmapping */
  58         podulebus_bs_map,
  59         podulebus_bs_unmap,
  60         podulebus_bs_subregion,
  61
  62         /* allocation/deallocation */
  63         podulebus_bs_alloc,
  64         podulebus_bs_free,
  65
  66         /* get kernel virtual address */
  67         0, /* there is no linear mapping */
  68
  69         /* mmap bus space for userland */
  70         bs_notimpl_bs_mmap, /* there is no bus mapping ... well maybe EASI space? */
  71
  72         /* barrier */
  73         podulebus_bs_barrier,
  74
  75         /* read (single) */
  76         podulebus_bs_r_1,
  77         podulebus_bs_r_2,
  78         podulebus_bs_r_4,
  79         bs_notimpl_bs_r_8,
  80
  81         /* read multiple */
  82         podulebus_bs_rm_1,
  83         podulebus_bs_rm_2,
  84         bs_notimpl_bs_rm_4,
  85         bs_notimpl_bs_rm_8,
  86
  87         /* read region */
  88         podulebus_bs_rr_1,
  89         podulebus_bs_rr_2,
  90         bs_notimpl_bs_rr_4,
  91         bs_notimpl_bs_rr_8,
  92
  93         /* write (single) */
  94         podulebus_bs_w_1,
  95         podulebus_bs_w_2,
  96         podulebus_bs_w_4,
  97         bs_notimpl_bs_w_8,
  98
  99         /* write multiple */
 100         podulebus_bs_wm_1,
 101         podulebus_bs_wm_2,
 102         bs_notimpl_bs_wm_4,
 103         bs_notimpl_bs_wm_8,
 104
 105         /* write region */
 106         podulebus_bs_wr_1,
 107         podulebus_bs_wr_2,
 108         bs_notimpl_bs_wr_4,
 109         bs_notimpl_bs_wr_8,
 110
 111         /* set multiple */
 112         bs_notimpl_bs_sm_1,
 113         bs_notimpl_bs_sm_2,
 114         bs_notimpl_bs_sm_4,
 115         bs_notimpl_bs_sm_8,
 116
 117         /* set region */
 118         podulebus_bs_sr_1,
 119         podulebus_bs_sr_2,
 120         bs_notimpl_bs_sr_4,
 121         bs_notimpl_bs_sr_8,
 122
 123         /* copy */
 124         bs_notimpl_bs_c_1,
 125         bs_notimpl_bs_c_2,
 126         bs_notimpl_bs_c_4,
 127         bs_notimpl_bs_c_8,
 128 };
 129
 130 /* bus space functions */
 131
 132 int
 133 podulebus_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, bus_space_handle_t *bshp)
 134 {
 135         /*
 136          * Temporary implementation as all I/O is already mapped etc.
 137          *
 138          * Eventually this function will do the mapping check for multiple maps
 139          */
 140         *bshp = bpa;
 141         return(0);
 142         }
 143
 144 int
 145 podulebus_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
 146     bus_size_t size, bus_size_t alignment, bus_size_t boundary,
 147     int cacheable, bus_addr_t *bpap, bus_space_handle_t *bshp)
 148 {
 149         panic("podulebus_bs_alloc(): Help!");
 150 }
 151
 152
 153 void
 154 podulebus_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
 155 {
 156         /*
 157          * Temporary implementation
 158          */
 159 }
 160
 161 void
 162 podulebus_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
 163 {
 164
 165         panic("podulebus_bs_free(): Help!");
 166         /* podulebus_bs_unmap() does all that we need to do. */
 167 /*      podulebus_bs_unmap(t, bsh, size);*/
 168 }
 169
 170 int
 171 podulebus_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
 172 {
 173
 174         *nbshp = bsh + (offset << ((int)t));
 175         return (0);
 176 }
 177
 178 void
 179 podulebus_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags)
 180 {
 181 }
 182
 183 /* Rough-and-ready implementations from arm26 */
 184
 185 void
 186 podulebus_bs_rr_1(void *cookie, bus_space_handle_t bsh,
 187                         bus_size_t offset, u_int8_t *datap, bus_size_t count)
 188 {
 189         int i;
 190
 191         for (i = 0; i < count; i++)
 192                 datap[i] = podulebus_bs_r_1(cookie, bsh, offset + i);
 193 }
 194
 195 void
 196 podulebus_bs_rr_2(void *cookie, bus_space_handle_t bsh,
 197                         bus_size_t offset, u_int16_t *datap, bus_size_t count)
 198 {
 199         int i;
 200
 201         for (i = 0; i < count; i++)
 202                 datap[i] = podulebus_bs_r_2(cookie, bsh, offset + i);
 203 }
 204
 205 void
 206 podulebus_bs_wr_1(void *cookie, bus_space_handle_t bsh,
 207                          bus_size_t offset, u_int8_t const *datap,
 208                          bus_size_t count)
 209 {
 210         int i;
 211
 212         for (i = 0; i < count; i++)
 213                 podulebus_bs_w_1(cookie, bsh, offset + i, datap[i]);
 214 }
 215
 216 void
 217 podulebus_bs_wr_2(void *cookie, bus_space_handle_t bsh,
 218                          bus_size_t offset, u_int16_t const *datap,
 219                          bus_size_t count)
 220 {
 221         int i;
 222
 223         for (i = 0; i < count; i++)
 224                 podulebus_bs_w_2(cookie, bsh, offset + i, datap[i]);
 225 }
 226
 227 void
 228 podulebus_bs_sr_1(void *cookie, bus_space_handle_t bsh,
 229                        bus_size_t offset, u_int8_t value, bus_size_t count)
 230 {
 231         int i;
 232
 233         for (i = 0; i < count; i++)
 234                 podulebus_bs_w_1(cookie, bsh, offset + i, value);
 235 }
 236
 237 void
 238 podulebus_bs_sr_2(void *cookie, bus_space_handle_t bsh,
 239                        bus_size_t offset, u_int16_t value, bus_size_t count)
 240 {
 241         int i;
 242
 243         for (i = 0; i < count; i++)
 244                 podulebus_bs_w_2(cookie, bsh, offset + i, value);
 245 }