sys/arch/arm/xscale/pxa2x0_space.c

   1 /*      $NetBSD: pxa2x0_space.c,v 1.8 2005/11/24 13:08:32 yamt Exp $ */
   2
   3 /*
   4  * Copyright (c) 2001, 2002 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  * Copyright (c) 1997 Mark Brinicombe.
  39  * Copyright (c) 1997 Causality Limited.
  40  * All rights reserved.
  41  *
  42  * This code is derived from software contributed to The NetBSD Foundation
  43  * by Ichiro FUKUHARA.
  44  *
  45  * Redistribution and use in source and binary forms, with or without
  46  * modification, are permitted provided that the following conditions
  47  * are met:
  48  * 1. Redistributions of source code must retain the above copyright
  49  *    notice, this list of conditions and the following disclaimer.
  50  * 2. Redistributions in binary form must reproduce the above copyright
  51  *    notice, this list of conditions and the following disclaimer in the
  52  *    documentation and/or other materials provided with the distribution.
  53  * 3. All advertising materials mentioning features or use of this software
  54  *    must display the following acknowledgement:
  55  *      This product includes software developed by Mark Brinicombe.
  56  * 4. The name of the company nor the name of the author may be used to
  57  *    endorse or promote products derived from this software without specific
  58  *    prior written permission.
  59  *
  60  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  61  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  62  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  63  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  64  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  65  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  66  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  67  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  68  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  69  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  70  * SUCH DAMAGE.
  71  */
  72
  73 /*
  74  * bus_space functions for Intel PXA2[51]0 application processor.
  75  * Derived from i80321_space.c.
  76  */
  77
  78 #include <sys/cdefs.h>
  79 __KERNEL_RCSID(0, "$NetBSD: pxa2x0_space.c,v 1.8 2005/11/24 13:08:32 yamt Exp $");
  80
  81 #include <sys/param.h>
  82 #include <sys/systm.h>
  83
  84 #include <uvm/uvm_extern.h>
  85
  86 #include <machine/bus.h>
  87
  88 /* Prototypes for all the bus_space structure functions */
  89 bs_protos(pxa2x0);
  90 bs_protos(generic);
  91 bs_protos(generic_armv4);
  92 bs_protos(bs_notimpl);
  93
  94 struct bus_space pxa2x0_bs_tag = {
  95         /* cookie */
  96         (void *) 0,
  97
  98         /* mapping/unmapping */
  99         pxa2x0_bs_map,
 100         pxa2x0_bs_unmap,
 101         pxa2x0_bs_subregion,
 102
 103         /* allocation/deallocation */
 104         pxa2x0_bs_alloc,        /* not implemented */
 105         pxa2x0_bs_free,         /* not implemented */
 106
 107         /* get kernel virtual address */
 108         pxa2x0_bs_vaddr,
 109
 110         /* mmap */
 111         bs_notimpl_bs_mmap,
 112
 113         /* barrier */
 114         pxa2x0_bs_barrier,
 115
 116         /* read (single) */
 117         generic_bs_r_1,
 118         generic_armv4_bs_r_2,
 119         generic_bs_r_4,
 120         bs_notimpl_bs_r_8,
 121
 122         /* read multiple */
 123         generic_bs_rm_1,
 124         generic_armv4_bs_rm_2,
 125         generic_bs_rm_4,
 126         bs_notimpl_bs_rm_8,
 127
 128         /* read region */
 129         generic_bs_rr_1,
 130         generic_armv4_bs_rr_2,
 131         generic_bs_rr_4,
 132         bs_notimpl_bs_rr_8,
 133
 134         /* write (single) */
 135         generic_bs_w_1,
 136         generic_armv4_bs_w_2,
 137         generic_bs_w_4,
 138         bs_notimpl_bs_w_8,
 139
 140         /* write multiple */
 141         generic_bs_wm_1,
 142         generic_armv4_bs_wm_2,
 143         generic_bs_wm_4,
 144         bs_notimpl_bs_wm_8,
 145
 146         /* write region */
 147         generic_bs_wr_1,
 148         generic_armv4_bs_wr_2,
 149         generic_bs_wr_4,
 150         bs_notimpl_bs_wr_8,
 151
 152         /* set multiple */
 153         bs_notimpl_bs_sm_1,
 154         bs_notimpl_bs_sm_2,
 155         bs_notimpl_bs_sm_4,
 156         bs_notimpl_bs_sm_8,
 157
 158         /* set region */
 159         generic_bs_sr_1,
 160         generic_armv4_bs_sr_2,
 161         bs_notimpl_bs_sr_4,
 162         bs_notimpl_bs_sr_8,
 163
 164         /* copy */
 165         bs_notimpl_bs_c_1,
 166         generic_armv4_bs_c_2,
 167         bs_notimpl_bs_c_4,
 168         bs_notimpl_bs_c_8,
 169 };
 170
 171 int
 172 pxa2x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
 173               int flag, bus_space_handle_t *bshp)
 174 {
 175         u_long startpa, endpa, pa;
 176         vaddr_t va;
 177         pt_entry_t *pte;
 178         const struct pmap_devmap        *pd;
 179
 180         if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
 181                 /* Device was statically mapped. */
 182                 *bshp = pd->pd_va + (bpa - pd->pd_pa);
 183                 return 0;
 184         }
 185
 186         startpa = trunc_page(bpa);
 187         endpa = round_page(bpa + size);
 188
 189         /* XXX use extent manager to check duplicate mapping */
 190
 191         va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
 192             UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
 193         if (! va)
 194                 return(ENOMEM);
 195
 196         *bshp = (bus_space_handle_t)(va + (bpa - startpa));
 197
 198         for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
 199                 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0);
 200                 if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
 201                         pte = vtopte(va);
 202                         *pte &= ~L2_S_CACHE_MASK;
 203                         PTE_SYNC(pte);
 204                         /* XXX: pmap_kenter_pa() also does PTE_SYNC(). a bit of
 205                          *      waste.
 206                          */
 207                 }
 208         }
 209         pmap_update(pmap_kernel());
 210
 211         return(0);
 212 }
 213
 214 void
 215 pxa2x0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
 216 {
 217         vaddr_t va;
 218         vsize_t sz;
 219
 220         if (pmap_devmap_find_va(bsh, size) != NULL) {
 221                 /* Device was statically mapped; nothing to do. */
 222                 return;
 223         }
 224
 225         va = trunc_page(bsh);
 226         sz = round_page(bsh + size) - va;
 227
 228         pmap_kremove(va, sz);
 229         pmap_update(pmap_kernel());
 230         uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY);
 231 }
 232
 233
 234 int
 235 pxa2x0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
 236     bus_size_t size, bus_space_handle_t *nbshp)
 237 {
 238
 239         *nbshp = bsh + offset;
 240         return (0);
 241 }
 242
 243 void
 244 pxa2x0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
 245     bus_size_t len, int flags)
 246 {
 247
 248         /* Nothing to do. */
 249 }
 250
 251 void *
 252 pxa2x0_bs_vaddr(void *t, bus_space_handle_t bsh)
 253 {
 254
 255         return ((void *)bsh);
 256 }
 257
 258
 259 int
 260 pxa2x0_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
 261     bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
 262     bus_addr_t *bpap, bus_space_handle_t *bshp)
 263 {
 264
 265         panic("pxa2x0_io_bs_alloc(): not implemented\n");
 266 }
 267
 268 void
 269 pxa2x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
 270 {
 271
 272         panic("pxa2x0_io_bs_free(): not implemented\n");
 273 }
 274