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/arm/xscale/ixp425/ixp425_space.c

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    1 /*      $NetBSD: ixp425_space.c,v 1.6 2006/04/10 03:36:03 simonb Exp $ */
    2 
    3 /*
    4  * Copyright (c) 2003
    5  *      Ichiro FUKUHARA <ichiro@ichiro.org>.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following 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  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Ichiro FUKUHARA.
   19  * 4. The name of the company nor the name of the author may be used to
   20  *    endorse or promote products derived from this software without specific
   21  *    prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
   27  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD: releng/6.3/sys/arm/xscale/ixp425/ixp425_space.c 167038 2007-02-26 23:13:09Z cognet $");
   38 
   39 /*
   40  * bus_space I/O functions for ixp425
   41  */
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/bus.h>
   46 
   47 #include <machine/pcb.h>
   48 
   49 #include <vm/vm.h>
   50 #include <vm/vm_kern.h>
   51 #include <vm/pmap.h>
   52 #include <vm/vm_page.h>
   53 #include <vm/vm_extern.h>
   54 
   55 #include <machine/bus.h>
   56 
   57 #include <arm/xscale/ixp425/ixp425reg.h>
   58 #include <arm/xscale/ixp425/ixp425var.h>
   59 
   60 /* Proto types for all the bus_space structure functions */
   61 bs_protos(ixp425);
   62 bs_protos(generic);
   63 bs_protos(generic_armv4);
   64 
   65 struct bus_space ixp425_bs_tag = {
   66         /* cookie */
   67         .bs_cookie      = (void *) 0,
   68 
   69         /* mapping/unmapping */
   70         .bs_map         = ixp425_bs_map,
   71         .bs_unmap       = ixp425_bs_unmap,
   72         .bs_subregion   = ixp425_bs_subregion,
   73 
   74         /* allocation/deallocation */
   75         .bs_alloc       = ixp425_bs_alloc,
   76         .bs_free        = ixp425_bs_free,
   77 
   78         /* barrier */
   79         .bs_barrier     = ixp425_bs_barrier,
   80 
   81         /* read (single) */
   82         .bs_r_1         = generic_bs_r_1,
   83         .bs_r_2         = generic_armv4_bs_r_2,
   84         .bs_r_4         = generic_bs_r_4,
   85         .bs_r_8         = NULL,
   86 
   87         /* read multiple */
   88         .bs_rm_1        = generic_bs_rm_1,
   89         .bs_rm_2        = generic_armv4_bs_rm_2,
   90         .bs_rm_4        = generic_bs_rm_4,
   91         .bs_rm_8        = NULL,
   92 
   93         /* read region */
   94         .bs_rr_1        = generic_bs_rr_1,
   95         .bs_rr_2        = generic_armv4_bs_rr_2,
   96         .bs_rr_4        = generic_bs_rr_4,
   97         .bs_rr_8        = NULL,
   98 
   99         /* write (single) */
  100         .bs_w_1         = generic_bs_w_1,
  101         .bs_w_2         = generic_armv4_bs_w_2,
  102         .bs_w_4         = generic_bs_w_4,
  103         .bs_w_8         = NULL,
  104 
  105         /* write multiple */
  106         .bs_wm_1        = generic_bs_wm_1,
  107         .bs_wm_2        = generic_armv4_bs_wm_2,
  108         .bs_wm_4        = generic_bs_wm_4,
  109         .bs_wm_8        = NULL,
  110 
  111         /* write region */
  112         .bs_wr_1        = generic_bs_wr_1,
  113         .bs_wr_2        = generic_armv4_bs_wr_2,
  114         .bs_wr_4        = generic_bs_wr_4,
  115         .bs_wr_8        = NULL,
  116 
  117         /* set multiple */
  118         /* XXX not implemented */
  119 
  120         /* set region */
  121         .bs_sr_1        = NULL,
  122         .bs_sr_2        = generic_armv4_bs_sr_2,
  123         .bs_sr_4        = generic_bs_sr_4,
  124         .bs_sr_8        = NULL,
  125 
  126         /* copy */
  127         .bs_c_1         = NULL,
  128         .bs_c_2         = generic_armv4_bs_c_2,
  129         .bs_c_4         = NULL,
  130         .bs_c_8         = NULL,
  131 };
  132 
  133 int
  134 ixp425_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
  135               int cacheable, bus_space_handle_t *bshp)
  136 {
  137         const struct pmap_devmap *pd;
  138         vm_paddr_t startpa, endpa, pa, offset;
  139         vm_offset_t va;
  140         pt_entry_t *pte;
  141 
  142         if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
  143                 /* Device was statically mapped. */
  144                 *bshp = pd->pd_va + (bpa - pd->pd_pa);
  145                 return (0);
  146         }
  147 
  148         endpa = round_page(bpa + size);
  149         offset = bpa & PAGE_MASK;
  150         startpa = trunc_page(bpa);
  151 
  152         va = kmem_alloc(kernel_map, endpa - startpa);
  153         if (va == 0)
  154                 return (ENOMEM);
  155 
  156         *bshp = va + offset;
  157 
  158         for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
  159                 pmap_kenter(va, pa);
  160                 pte = vtopte(va);
  161                 *pte &= ~L2_S_CACHE_MASK;
  162                 PTE_SYNC(pte);
  163         }
  164 
  165         return (0);
  166 }
  167 
  168 void
  169 ixp425_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
  170 {
  171         vm_offset_t va, endva;
  172 
  173         if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) {
  174                 /* Device was statically mapped; nothing to do. */
  175                 return;
  176         }
  177 
  178         endva = round_page((vm_offset_t)t + size);
  179         va = trunc_page((vm_offset_t)t);
  180 
  181         while (va < endva) {
  182                 pmap_kremove(va);
  183                 va += PAGE_SIZE;
  184         }
  185         kmem_free(kernel_map, va, endva - va);
  186 }
  187 
  188 int
  189 ixp425_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
  190         bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
  191         bus_addr_t *bpap, bus_space_handle_t *bshp)
  192 {
  193         panic("ixp425_bs_alloc(): not implemented");
  194 }
  195 
  196 void    
  197 ixp425_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
  198 {
  199         panic("ixp425_bs_free(): not implemented");
  200 }
  201 
  202 int
  203 ixp425_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
  204         bus_size_t size, bus_space_handle_t *nbshp)
  205 {
  206         *nbshp = bsh + offset;
  207         return (0);
  208 }
  209 
  210 void
  211 ixp425_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
  212     bus_size_t len, int flags)
  213 {
  214         /* Nothing to do. */
  215 }       

Cache object: 91f5501ee9fda87655577ad24444759c


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