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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
    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 unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: stable/12/sys/mips/atheros/ar71xx_bus_space_reversed.c 326259 2017-11-27 15:07:26Z pfg $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 
   36 #include <machine/bus.h>
   37 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   38 
   39 static bs_r_1_proto(reversed);
   40 static bs_r_2_proto(reversed);
   41 static bs_w_1_proto(reversed);
   42 static bs_w_2_proto(reversed);
   43 
   44 /*
   45  * Bus space that handles offsets in word for 1/2 bytes read/write access.
   46  * Byte order of values is handled by device drivers itself. 
   47  */
   48 static struct bus_space bus_space_reversed = {
   49         /* cookie */
   50         (void *) 0,
   51 
   52         /* mapping/unmapping */
   53         generic_bs_map,
   54         generic_bs_unmap,
   55         generic_bs_subregion,
   56 
   57         /* allocation/deallocation */
   58         NULL,
   59         NULL,
   60 
   61         /* barrier */
   62         generic_bs_barrier,
   63 
   64         /* read (single) */
   65         reversed_bs_r_1,
   66         reversed_bs_r_2,
   67         generic_bs_r_4,
   68         NULL,
   69 
   70         /* read multiple */
   71         generic_bs_rm_1,
   72         generic_bs_rm_2,
   73         generic_bs_rm_4,
   74         NULL,
   75 
   76         /* read region */
   77         generic_bs_rr_1,
   78         generic_bs_rr_2,
   79         generic_bs_rr_4,
   80         NULL,
   81 
   82         /* write (single) */
   83         reversed_bs_w_1,
   84         reversed_bs_w_2,
   85         generic_bs_w_4,
   86         NULL,
   87 
   88         /* write multiple */
   89         generic_bs_wm_1,
   90         generic_bs_wm_2,
   91         generic_bs_wm_4,
   92         NULL,
   93 
   94         /* write region */
   95         NULL,
   96         generic_bs_wr_2,
   97         generic_bs_wr_4,
   98         NULL,
   99 
  100         /* set multiple */
  101         NULL,
  102         NULL,
  103         NULL,
  104         NULL,
  105 
  106         /* set region */
  107         NULL,
  108         generic_bs_sr_2,
  109         generic_bs_sr_4,
  110         NULL,
  111 
  112         /* copy */
  113         NULL,
  114         generic_bs_c_2,
  115         NULL,
  116         NULL,
  117 
  118         /* read (single) stream */
  119         generic_bs_r_1,
  120         generic_bs_r_2,
  121         generic_bs_r_4,
  122         NULL,
  123 
  124         /* read multiple stream */
  125         generic_bs_rm_1,
  126         generic_bs_rm_2,
  127         generic_bs_rm_4,
  128         NULL,
  129 
  130         /* read region stream */
  131         generic_bs_rr_1,
  132         generic_bs_rr_2,
  133         generic_bs_rr_4,
  134         NULL,
  135 
  136         /* write (single) stream */
  137         generic_bs_w_1,
  138         generic_bs_w_2,
  139         generic_bs_w_4,
  140         NULL,
  141 
  142         /* write multiple stream */
  143         generic_bs_wm_1,
  144         generic_bs_wm_2,
  145         generic_bs_wm_4,
  146         NULL,
  147 
  148         /* write region stream */
  149         NULL,
  150         generic_bs_wr_2,
  151         generic_bs_wr_4,
  152         NULL,
  153 };
  154 
  155 bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
  156 
  157 static uint8_t
  158 reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
  159 {
  160 
  161         return readb(h + (o &~ 3) + (3 - (o & 3)));
  162 }
  163 
  164 static void
  165 reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
  166 {
  167 
  168         writeb(h + (o &~ 3) + (3 - (o & 3)), v);
  169 }
  170 
  171 static uint16_t
  172 reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
  173 {
  174 
  175         return readw(h + (o &~ 3) + (2 - (o & 3)));
  176 }
  177 
  178 static void
  179 reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
  180 {
  181 
  182         writew(h + (o &~ 3) + (2 - (o & 3)), v);
  183 }

Cache object: 88fd6d04ddf7914a3dc733de3f63988f


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