sys/arch/evbarm/iq80321/obio_space.c

   1 /*      $NetBSD: obio_space.c,v 1.9 2005/11/24 13:08:33 yamt 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 __KERNEL_RCSID(0, "$NetBSD: obio_space.c,v 1.9 2005/11/24 13:08:33 yamt Exp $");
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47
  48 #include <uvm/uvm_extern.h>
  49
  50 #include <machine/bus.h>
  51
  52 /* Prototypes for all the bus_space structure functions */
  53 bs_protos(obio);
  54 bs_protos(generic);
  55 bs_protos(generic_armv4);
  56 bs_protos(bs_notimpl);
  57
  58 /*
  59  * The obio bus space tag.  This is constant for all instances, so
  60  * we never have to explicitly "create" it.
  61  */
  62 struct bus_space obio_bs_tag = {
  63         /* cookie */
  64         (void *) 0,
  65
  66         /* mapping/unmapping */
  67         obio_bs_map,
  68         obio_bs_unmap,
  69         obio_bs_subregion,
  70
  71         /* allocation/deallocation */
  72         obio_bs_alloc,
  73         obio_bs_free,
  74
  75         /* get kernel virtual address */
  76         obio_bs_vaddr,
  77
  78         /* mmap */
  79         bs_notimpl_bs_mmap,
  80
  81         /* barrier */
  82         obio_bs_barrier,
  83
  84         /* read (single) */
  85         generic_bs_r_1,
  86         generic_armv4_bs_r_2,
  87         generic_bs_r_4,
  88         bs_notimpl_bs_r_8,
  89
  90         /* read multiple */
  91         generic_bs_rm_1,
  92         generic_armv4_bs_rm_2,
  93         bs_notimpl_bs_rm_4,
  94         bs_notimpl_bs_rm_8,
  95
  96         /* read region */
  97         generic_bs_rr_1,
  98         bs_notimpl_bs_rr_2,
  99         bs_notimpl_bs_rr_4,
 100         bs_notimpl_bs_rr_8,
 101
 102         /* write (single) */
 103         generic_bs_w_1,
 104         generic_armv4_bs_w_2,
 105         generic_bs_w_4,
 106         bs_notimpl_bs_w_8,
 107
 108         /* write multiple */
 109         generic_bs_wm_1,
 110         generic_armv4_bs_wm_2,
 111         bs_notimpl_bs_wm_4,
 112         bs_notimpl_bs_wm_8,
 113
 114         /* write region */
 115         bs_notimpl_bs_wr_1,
 116         bs_notimpl_bs_wr_2,
 117         bs_notimpl_bs_wr_4,
 118         bs_notimpl_bs_wr_8,
 119
 120         /* set multiple */
 121         bs_notimpl_bs_sm_1,
 122         bs_notimpl_bs_sm_2,
 123         bs_notimpl_bs_sm_4,
 124         bs_notimpl_bs_sm_8,
 125
 126         /* set region */
 127         bs_notimpl_bs_sr_1,
 128         bs_notimpl_bs_sr_2,
 129         bs_notimpl_bs_sr_4,
 130         bs_notimpl_bs_sr_8,
 131
 132         /* copy */
 133         bs_notimpl_bs_c_1,
 134         bs_notimpl_bs_c_2,
 135         bs_notimpl_bs_c_4,
 136         bs_notimpl_bs_c_8,
 137 };
 138
 139 int
 140 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
 141     bus_space_handle_t *bshp)
 142 {
 143         const struct pmap_devmap *pd;
 144         paddr_t startpa, endpa, pa, offset;
 145         vaddr_t va;
 146         pt_entry_t *pte;
 147
 148         if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
 149                 /* Device was statically mapped. */
 150                 *bshp = pd->pd_va + (bpa - pd->pd_pa);
 151                 return (0);
 152         }
 153
 154         endpa = round_page(bpa + size);
 155         offset = bpa & PAGE_MASK;
 156         startpa = trunc_page(bpa);
 157
 158         va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
 159             UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
 160         if (va == 0)
 161                 return (ENOMEM);
 162
 163         *bshp = va + offset;
 164
 165         for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
 166                 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0);
 167                 pte = vtopte(va);
 168                 *pte &= ~L2_S_CACHE_MASK;
 169                 PTE_SYNC(pte);
 170         }
 171         pmap_update(pmap_kernel());
 172
 173         return (0);
 174 }
 175
 176 int
 177 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
 178     bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
 179     bus_space_handle_t *bshp)
 180 {
 181
 182         panic("obio_bs_alloc(): not implemented");
 183 }
 184
 185
 186 void
 187 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
 188 {
 189         vaddr_t va, endva;
 190
 191         if (pmap_devmap_find_va(bsh, size) != NULL) {
 192                 /* Device was statically mapped; nothing to do. */
 193                 return;
 194         }
 195
 196         endva = round_page(bsh + size);
 197         va = trunc_page(bsh);
 198
 199         pmap_kremove(va, endva - va);
 200         uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
 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_vaddr(void *t, bus_space_handle_t bsh)
 221 {
 222
 223         return ((void *)bsh);
 224 }
 225
 226 void
 227 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
 228     bus_size_t len, int flags)
 229 {
 230
 231         /* Nothing to do. */
 232 }