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/arm64/arm64/bus_machdep.c

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    1 /*-
    2  * Copyright (c) 2014 Andrew Turner
    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, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include "opt_platform.h"
   29 
   30 #include <sys/param.h>
   31 __FBSDID("$FreeBSD: releng/11.2/sys/arm64/arm64/bus_machdep.c 286768 2015-08-14 09:55:25Z andrew $");
   32 
   33 #include <vm/vm.h>
   34 #include <vm/pmap.h>
   35 
   36 #include <machine/bus.h>
   37 
   38 uint8_t  generic_bs_r_1(void *, bus_space_handle_t, bus_size_t);
   39 uint16_t generic_bs_r_2(void *, bus_space_handle_t, bus_size_t);
   40 uint32_t generic_bs_r_4(void *, bus_space_handle_t, bus_size_t);
   41 uint64_t generic_bs_r_8(void *, bus_space_handle_t, bus_size_t);
   42 
   43 void generic_bs_rm_1(void *, bus_space_handle_t, bus_size_t, uint8_t *,
   44     bus_size_t);
   45 void generic_bs_rm_2(void *, bus_space_handle_t, bus_size_t, uint16_t *,
   46     bus_size_t);
   47 void generic_bs_rm_4(void *, bus_space_handle_t, bus_size_t, uint32_t *,
   48     bus_size_t);
   49 void generic_bs_rm_8(void *, bus_space_handle_t, bus_size_t, uint64_t *,
   50     bus_size_t);
   51 
   52 void generic_bs_rr_1(void *, bus_space_handle_t, bus_size_t, uint8_t *,
   53     bus_size_t);
   54 void generic_bs_rr_2(void *, bus_space_handle_t, bus_size_t, uint16_t *,
   55     bus_size_t);
   56 void generic_bs_rr_4(void *, bus_space_handle_t, bus_size_t, uint32_t *,
   57     bus_size_t);
   58 void generic_bs_rr_8(void *, bus_space_handle_t, bus_size_t, uint64_t *,
   59     bus_size_t);
   60 
   61 void generic_bs_w_1(void *, bus_space_handle_t, bus_size_t, uint8_t);
   62 void generic_bs_w_2(void *, bus_space_handle_t, bus_size_t, uint16_t);
   63 void generic_bs_w_4(void *, bus_space_handle_t, bus_size_t, uint32_t);
   64 void generic_bs_w_8(void *, bus_space_handle_t, bus_size_t, uint64_t);
   65 
   66 void generic_bs_wm_1(void *, bus_space_handle_t, bus_size_t, const uint8_t *,
   67     bus_size_t);
   68 void generic_bs_wm_2(void *, bus_space_handle_t, bus_size_t, const uint16_t *,
   69     bus_size_t);
   70 void generic_bs_wm_4(void *, bus_space_handle_t, bus_size_t, const uint32_t *,
   71     bus_size_t);
   72 void generic_bs_wm_8(void *, bus_space_handle_t, bus_size_t, const uint64_t *,
   73     bus_size_t);
   74 
   75 void generic_bs_wr_1(void *, bus_space_handle_t, bus_size_t, const uint8_t *,
   76     bus_size_t);
   77 void generic_bs_wr_2(void *, bus_space_handle_t, bus_size_t, const uint16_t *,
   78     bus_size_t);
   79 void generic_bs_wr_4(void *, bus_space_handle_t, bus_size_t, const uint32_t *,
   80     bus_size_t);
   81 void generic_bs_wr_8(void *, bus_space_handle_t, bus_size_t, const uint64_t *,
   82     bus_size_t);
   83 
   84 static int
   85 generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
   86     bus_space_handle_t *bshp)
   87 {
   88         void *va;
   89 
   90         va = pmap_mapdev(bpa, size);
   91         if (va == NULL)
   92                 return (ENOMEM);
   93         *bshp = (bus_space_handle_t)va;
   94         return (0);
   95 }
   96 
   97 static void
   98 generic_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
   99 {
  100 
  101         pmap_unmapdev(bsh, size);
  102 }
  103 
  104 static void
  105 generic_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
  106     bus_size_t size, int flags)
  107 {
  108 }
  109 
  110 static int
  111 generic_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
  112     bus_size_t size, bus_space_handle_t *nbshp)
  113 {
  114 
  115         *nbshp = bsh + offset;
  116         return (0);
  117 }
  118 
  119 struct bus_space memmap_bus = {
  120         /* cookie */
  121         .bs_cookie = NULL,
  122 
  123         /* mapping/unmapping */
  124         .bs_map = generic_bs_map,
  125         .bs_unmap = generic_bs_unmap,
  126         .bs_subregion = generic_bs_subregion,
  127 
  128         /* allocation/deallocation */
  129         .bs_alloc = NULL,
  130         .bs_free = NULL,
  131 
  132         /* barrier */
  133         .bs_barrier = generic_bs_barrier,
  134 
  135         /* read single */
  136         .bs_r_1 = generic_bs_r_1,
  137         .bs_r_2 = generic_bs_r_2,
  138         .bs_r_4 = generic_bs_r_4,
  139         .bs_r_8 = generic_bs_r_8,
  140 
  141         /* read multiple */
  142         .bs_rm_1 = generic_bs_rm_1,
  143         .bs_rm_2 = generic_bs_rm_2,
  144         .bs_rm_4 = generic_bs_rm_4,
  145         .bs_rm_8 = generic_bs_rm_8,
  146 
  147         /* read region */
  148         .bs_rr_1 = generic_bs_rr_1,
  149         .bs_rr_2 = generic_bs_rr_2,
  150         .bs_rr_4 = generic_bs_rr_4,
  151         .bs_rr_8 = generic_bs_rr_8,
  152 
  153         /* write single */
  154         .bs_w_1 = generic_bs_w_1,
  155         .bs_w_2 = generic_bs_w_2,
  156         .bs_w_4 = generic_bs_w_4,
  157         .bs_w_8 = generic_bs_w_8,
  158 
  159         /* write multiple */
  160         .bs_wm_1 = generic_bs_wm_1,
  161         .bs_wm_2 = generic_bs_wm_2,
  162         .bs_wm_4 = generic_bs_wm_4,
  163         .bs_wm_8 = generic_bs_wm_8,
  164 
  165         /* write region */
  166         .bs_wr_1 = generic_bs_wr_1,
  167         .bs_wr_2 = generic_bs_wr_2,
  168         .bs_wr_4 = generic_bs_wr_4,
  169         .bs_wr_8 = generic_bs_wr_8,
  170 
  171         /* set multiple */
  172         .bs_sm_1 = NULL,
  173         .bs_sm_2 = NULL,
  174         .bs_sm_4 = NULL,
  175         .bs_sm_8 = NULL,
  176 
  177         /* set region */
  178         .bs_sr_1 = NULL,
  179         .bs_sr_2 = NULL,
  180         .bs_sr_4 = NULL,
  181         .bs_sr_8 = NULL,
  182 
  183         /* copy */
  184         .bs_c_1 = NULL,
  185         .bs_c_2 = NULL,
  186         .bs_c_4 = NULL,
  187         .bs_c_8 = NULL,
  188 
  189         /* read single stream */
  190         .bs_r_1_s = NULL,
  191         .bs_r_2_s = NULL,
  192         .bs_r_4_s = NULL,
  193         .bs_r_8_s = NULL,
  194 
  195         /* read multiple stream */
  196         .bs_rm_1_s = generic_bs_rm_1,
  197         .bs_rm_2_s = generic_bs_rm_2,
  198         .bs_rm_4_s = generic_bs_rm_4,
  199         .bs_rm_8_s = generic_bs_rm_8,
  200 
  201         /* read region stream */
  202         .bs_rr_1_s = NULL,
  203         .bs_rr_2_s = NULL,
  204         .bs_rr_4_s = NULL,
  205         .bs_rr_8_s = NULL,
  206 
  207         /* write single stream */
  208         .bs_w_1_s = NULL,
  209         .bs_w_2_s = NULL,
  210         .bs_w_4_s = NULL,
  211         .bs_w_8_s = NULL,
  212 
  213         /* write multiple stream */
  214         .bs_wm_1_s = generic_bs_wm_1,
  215         .bs_wm_2_s = generic_bs_wm_2,
  216         .bs_wm_4_s = generic_bs_wm_4,
  217         .bs_wm_8_s = generic_bs_wm_8,
  218 
  219         /* write region stream */
  220         .bs_wr_1_s = NULL,
  221         .bs_wr_2_s = NULL,
  222         .bs_wr_4_s = NULL,
  223         .bs_wr_8_s = NULL,
  224 };
  225 
  226 #ifdef FDT
  227 bus_space_tag_t fdtbus_bs_tag = &memmap_bus;
  228 #endif

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