sa11x0_io.c

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    1 /*      $NetBSD: sa11x0_io.c,v 1.12 2003/07/15 00:24:51 lukem Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1997 Mark Brinicombe.
    5  * Copyright (c) 1997 Causality Limited.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Ichiro FUKUHARA.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by Mark Brinicombe.
   22  * 4. The name of the company nor the name of the author may be used to
   23  *    endorse or promote products derived from this software without specific
   24  *    prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   27  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   28  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   29  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   30  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   31  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   32  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36  * SUCH DAMAGE.
   37  */
   38 
   39 /*
   40  * bus_space I/O functions for sa11x0
   41  */
   42 
   43 #include <sys/cdefs.h>
   44 __FBSDID("$FreeBSD: releng/6.0/sys/arm/sa11x0/sa11x0_io.c 145017 2005-04-13 16:02:03Z cognet $");
   45 #include <sys/param.h>
   46 #include <sys/systm.h>
   47 #include <sys/queue.h>
   48 #include <sys/types.h>
   49 #include <sys/lock.h>
   50 #include <sys/mutex.h>
   51 
   52 #include <vm/vm.h>
   53 #include <vm/pmap.h>
   54 #include <vm/vm_extern.h>
   55 #include <vm/vm_kern.h>
   56 
   57 #include <machine/bus.h>
   58 #include <machine/pmap.h>
   59 
   60 /* Proto types for all the bus_space structure functions */
   61 
   62 bs_protos(sa11x0);
   63 
   64 /* Declare the sa11x0 bus space tag */
   65 
   66 struct bus_space sa11x0_bs_tag = {
   67         /* cookie */
   68         NULL,
   69 
   70         /* mapping/unmapping */
   71         sa11x0_bs_map,
   72         sa11x0_bs_unmap,
   73         sa11x0_bs_subregion,
   74 
   75         /* allocation/deallocation */
   76         sa11x0_bs_alloc,
   77         sa11x0_bs_free,
   78 
   79         /* barrier */
   80         sa11x0_bs_barrier,
   81 
   82         /* read (single) */
   83         sa11x0_bs_r_1,
   84         sa11x0_bs_r_2,
   85         sa11x0_bs_r_4,
   86         NULL,
   87 
   88         /* read multiple */
   89         sa11x0_bs_rm_1,
   90         sa11x0_bs_rm_2,
   91         sa11x0_bs_rm_4,
   92         NULL,
   93 
   94         /* read region */
   95         NULL,
   96         sa11x0_bs_rr_2,
   97         NULL,
   98         NULL,
   99         /* write (single) */
  100         sa11x0_bs_w_1,
  101         sa11x0_bs_w_2,
  102         sa11x0_bs_w_4,
  103         NULL,
  104 
  105         /* write multiple */
  106         sa11x0_bs_wm_1,
  107         sa11x0_bs_wm_2,
  108         sa11x0_bs_wm_4,
  109         NULL,
  110 
  111         /* write region */
  112         NULL,
  113         sa11x0_bs_wr_2,
  114         NULL,
  115         NULL,   
  116 
  117         /* set multiple */
  118         NULL,
  119         NULL,
  120         NULL,
  121         NULL,
  122 
  123         /* set region */
  124         NULL,
  125         sa11x0_bs_sr_2,
  126         NULL,
  127         NULL,
  128 
  129         /* copy */
  130         NULL,
  131         sa11x0_bs_c_2,
  132         NULL,
  133         NULL,
  134 };
  135 
  136 /* bus space functions */
  137 
  138 int
  139 sa11x0_bs_map(t, bpa, size, cacheable, bshp)
  140         void *t;
  141         bus_addr_t bpa;
  142         bus_size_t size;
  143         int cacheable;
  144         bus_space_handle_t *bshp;
  145 {
  146         u_long startpa, endpa, pa;
  147         vm_offset_t va;
  148         pt_entry_t *pte;
  149 
  150         startpa = trunc_page(bpa);
  151         endpa = round_page(bpa + size);
  152 
  153         /* XXX use extent manager to check duplicate mapping */
  154 
  155         va = kmem_alloc(kernel_map, endpa - startpa);
  156         if (! va)
  157                 return(ENOMEM);
  158 
  159         *bshp = (bus_space_handle_t)(va + (bpa - startpa));
  160 
  161         for(pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
  162                 pmap_kenter(va, pa);
  163                 pte = vtopte(va);
  164                 if (cacheable == 0) {
  165                         *pte &= ~L2_S_CACHE_MASK;
  166                         PTE_SYNC(pte);
  167                 }
  168         }
  169         return(0);
  170 }
  171 
  172 int
  173 sa11x0_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
  174     bpap, bshp)
  175         void *t;
  176         bus_addr_t rstart, rend;
  177         bus_size_t size, alignment, boundary;
  178         int cacheable;
  179         bus_addr_t *bpap;
  180         bus_space_handle_t *bshp;
  181 {
  182         panic("sa11x0_alloc(): Help!");
  183 }
  184 
  185 
  186 void
  187 sa11x0_bs_unmap(t, size)
  188         void *t;
  189         bus_size_t size;
  190 {
  191         /*
  192          * Temporary implementation
  193          */
  194 }
  195 
  196 void    
  197 sa11x0_bs_free(t, bsh, size)
  198         void *t;
  199         bus_space_handle_t bsh;
  200         bus_size_t size;
  201 {
  202 
  203         panic("sa11x0_free(): Help!");
  204         /* sa11x0_unmap() does all that we need to do. */
  205 /*      sa11x0_unmap(t, bsh, size);*/
  206 }
  207 
  208 int
  209 sa11x0_bs_subregion(t, bsh, offset, size, nbshp)
  210         void *t;
  211         bus_space_handle_t bsh;
  212         bus_size_t offset, size;
  213         bus_space_handle_t *nbshp;
  214 {
  215 
  216         *nbshp = bsh + offset;
  217         return (0);
  218 }
  219 
  220 void
  221 sa11x0_bs_barrier(t, bsh, offset, len, flags)
  222         void *t;
  223         bus_space_handle_t bsh;
  224         bus_size_t offset, len;
  225         int flags;
  226 {
  227 /* NULL */
  228 }       
  229 
  230 /* End of sa11x0_io.c */

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FreeBSD/Linux Kernel Cross Reference sys/arm/sa11x0/sa11x0_io.c

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sys/arm/sa11x0/sa11x0_io.c