obio_space.c

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    1 /*      $NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * bus_space functions for IQ80321 on-board devices
   40  */
   41 
   42 #include <sys/cdefs.h>
   43 __FBSDID("$FreeBSD$");
   44 
   45 #include <sys/param.h>
   46 #include <sys/systm.h>
   47 #include <sys/bus.h>
   48 
   49 #include <machine/pcb.h>
   50 
   51 #include <vm/vm.h>
   52 #include <vm/pmap.h>
   53 #include <vm/vm_kern.h>
   54 #include <vm/vm_extern.h>
   55 
   56 #include <machine/bus.h>
   57 
   58 /* Prototypes for all the bus_space structure functions */
   59 bs_protos(obio);
   60 bs_protos(generic);
   61 bs_protos(generic_armv4);
   62 
   63 /*
   64  * The obio bus space tag.  This is constant for all instances, so
   65  * we never have to explicitly "create" it.
   66  */
   67 struct bus_space obio_bs_tag = {
   68         /* cookie */
   69         (void *) 0,
   70 
   71         /* mapping/unmapping */
   72         obio_bs_map,
   73         obio_bs_unmap,
   74         obio_bs_subregion,
   75 
   76         /* allocation/deallocation */
   77         obio_bs_alloc,
   78         obio_bs_free,
   79 
   80         /* barrier */
   81         obio_bs_barrier,
   82 
   83         /* read (single) */
   84         generic_bs_r_1,
   85         generic_armv4_bs_r_2,
   86         generic_bs_r_4,
   87         NULL,
   88 
   89         /* read multiple */
   90         generic_bs_rm_1,
   91         NULL,
   92         NULL,
   93         NULL,
   94 
   95         /* read region */
   96         generic_bs_rr_1,
   97         NULL,
   98         NULL,
   99         NULL,
  100 
  101         /* write (single) */
  102         generic_bs_w_1,
  103         generic_armv4_bs_w_2,
  104         generic_bs_w_4,
  105         NULL,
  106 
  107         /* write multiple */
  108         generic_bs_wm_1,
  109         NULL,
  110         NULL,
  111         NULL,
  112 
  113         /* write region */
  114         NULL,
  115         NULL,
  116         NULL,
  117         NULL,
  118 
  119         /* set multiple */
  120         NULL,
  121         NULL,
  122         NULL,
  123         NULL,
  124 
  125         /* set region */
  126         NULL,
  127         NULL,
  128         NULL,
  129         NULL,
  130 
  131         /* copy */
  132         NULL,
  133         NULL,
  134         NULL,
  135         NULL,
  136 };
  137 
  138 int
  139 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
  140     bus_space_handle_t *bshp)
  141 {
  142         const struct pmap_devmap *pd;
  143         vm_paddr_t startpa, endpa, pa, offset;
  144         vm_offset_t va;
  145         pt_entry_t *pte;
  146 
  147         if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
  148                 /* Device was statically mapped. */
  149                 *bshp = pd->pd_va + (bpa - pd->pd_pa);
  150                 return (0);
  151         }
  152 
  153         endpa = round_page(bpa + size);
  154         offset = bpa & PAGE_MASK;
  155         startpa = trunc_page(bpa);
  156                 
  157         va = kmem_alloc(kernel_map, endpa - startpa);
  158         if (va == 0)
  159                 return (ENOMEM);
  160 
  161         *bshp = va + offset;
  162 
  163         for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
  164                 pmap_kenter(va, pa);
  165                 pte = vtopte(va);
  166                 *pte &= ~L2_S_CACHE_MASK;
  167                 PTE_SYNC(pte);
  168         }
  169 
  170         return (0);
  171 }
  172 
  173 int
  174 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
  175     bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
  176     bus_space_handle_t *bshp)
  177 {
  178 
  179         panic("obio_bs_alloc(): not implemented");
  180 }
  181 
  182 
  183 void
  184 obio_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
  185 {
  186         vm_offset_t va, endva;
  187 
  188         if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) {
  189                 /* Device was statically mapped; nothing to do. */
  190                 return;
  191         }
  192 
  193         endva = round_page((vm_offset_t)t + size);
  194         va = trunc_page((vm_offset_t)t);
  195 
  196         while (va < endva) {
  197                 pmap_kremove(va);
  198                 va += PAGE_SIZE;
  199         }
  200         kmem_free(kernel_map, va, endva - va);
  201 }
  202 
  203 void    
  204 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
  205 {
  206 
  207         panic("obio_bs_free(): not implemented");
  208 }
  209 
  210 int
  211 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
  212     bus_size_t size, bus_space_handle_t *nbshp)
  213 {
  214 
  215         *nbshp = bsh + offset;
  216         return (0);
  217 }
  218 
  219 void
  220 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
  221     bus_size_t len, int flags)
  222 {
  223 
  224         /* Nothing to do. */
  225 }

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FreeBSD/Linux Kernel Cross Reference sys/arm/xscale/i8134x/obio_space.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/i8134x/obio_space.c