The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_bus_space_reversed.c

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    1 /*-
    2  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: stable/8/sys/mips/atheros/ar71xx_bus_space_reversed.c 215938 2010-11-27 12:26:40Z jchandra $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 
   34 #include <machine/bus.h>
   35 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   36 
   37 static bs_r_1_proto(reversed);
   38 static bs_r_2_proto(reversed);
   39 static bs_w_1_proto(reversed);
   40 static bs_w_2_proto(reversed);
   41 
   42 /*
   43  * Bus space that handles offsets in word for 1/2 bytes read/write access.
   44  * Byte order of values is handled by device drivers itself. 
   45  */
   46 static struct bus_space bus_space_reversed = {
   47         /* cookie */
   48         (void *) 0,
   49 
   50         /* mapping/unmapping */
   51         generic_bs_map,
   52         generic_bs_unmap,
   53         generic_bs_subregion,
   54 
   55         /* allocation/deallocation */
   56         NULL,
   57         NULL,
   58 
   59         /* barrier */
   60         generic_bs_barrier,
   61 
   62         /* read (single) */
   63         reversed_bs_r_1,
   64         reversed_bs_r_2,
   65         generic_bs_r_4,
   66         NULL,
   67 
   68         /* read multiple */
   69         generic_bs_rm_1,
   70         generic_bs_rm_2,
   71         generic_bs_rm_4,
   72         NULL,
   73 
   74         /* read region */
   75         generic_bs_rr_1,
   76         generic_bs_rr_2,
   77         generic_bs_rr_4,
   78         NULL,
   79 
   80         /* write (single) */
   81         reversed_bs_w_1,
   82         reversed_bs_w_2,
   83         generic_bs_w_4,
   84         NULL,
   85 
   86         /* write multiple */
   87         generic_bs_wm_1,
   88         generic_bs_wm_2,
   89         generic_bs_wm_4,
   90         NULL,
   91 
   92         /* write region */
   93         NULL,
   94         generic_bs_wr_2,
   95         generic_bs_wr_4,
   96         NULL,
   97 
   98         /* set multiple */
   99         NULL,
  100         NULL,
  101         NULL,
  102         NULL,
  103 
  104         /* set region */
  105         NULL,
  106         generic_bs_sr_2,
  107         generic_bs_sr_4,
  108         NULL,
  109 
  110         /* copy */
  111         NULL,
  112         generic_bs_c_2,
  113         NULL,
  114         NULL,
  115 
  116         /* read (single) stream */
  117         generic_bs_r_1,
  118         generic_bs_r_2,
  119         generic_bs_r_4,
  120         NULL,
  121 
  122         /* read multiple stream */
  123         generic_bs_rm_1,
  124         generic_bs_rm_2,
  125         generic_bs_rm_4,
  126         NULL,
  127 
  128         /* read region stream */
  129         generic_bs_rr_1,
  130         generic_bs_rr_2,
  131         generic_bs_rr_4,
  132         NULL,
  133 
  134         /* write (single) stream */
  135         generic_bs_w_1,
  136         generic_bs_w_2,
  137         generic_bs_w_4,
  138         NULL,
  139 
  140         /* write multiple stream */
  141         generic_bs_wm_1,
  142         generic_bs_wm_2,
  143         generic_bs_wm_4,
  144         NULL,
  145 
  146         /* write region stream */
  147         NULL,
  148         generic_bs_wr_2,
  149         generic_bs_wr_4,
  150         NULL,
  151 };
  152 
  153 bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
  154 
  155 static uint8_t
  156 reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
  157 {
  158 
  159         return readb(h + (o &~ 3) + (3 - (o & 3)));
  160 }
  161 
  162 static void
  163 reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
  164 {
  165 
  166         writeb(h + (o &~ 3) + (3 - (o & 3)), v);
  167 }
  168 
  169 static uint16_t
  170 reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
  171 {
  172 
  173         return readw(h + (o &~ 3) + (2 - (o & 3)));
  174 }
  175 
  176 static void
  177 reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
  178 {
  179 
  180         writew(h + (o &~ 3) + (2 - (o & 3)), v);
  181 }

Cache object: 23b1eaa18202ac91f8db9be49092d1b1


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