sys/arch/arm/gemini/gemini_space.c

   1 /*      $NetBSD: gemini_space.c,v 1.1 2008/10/24 04:23:18 matt Exp $    */
   2
   3 /* adapted from:
   4  *      NetBSD: pxa2x0_space.c,v 1.8 2005/11/24 13:08:32 yamt Exp
   5  */
   6
   7 /*
   8  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
   9  * All rights reserved.
  10  *
  11  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed for the NetBSD Project by
  24  *      Wasabi Systems, Inc.
  25  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  26  *    or promote products derived from this software without specific prior
  27  *    written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  31  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  32  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  33  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  36  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  37  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  39  * POSSIBILITY OF SUCH DAMAGE.
  40  */
  41 /*
  42  * Copyright (c) 1997 Mark Brinicombe.
  43  * Copyright (c) 1997 Causality Limited.
  44  * All rights reserved.
  45  *
  46  * This code is derived from software contributed to The NetBSD Foundation
  47  * by Ichiro FUKUHARA.
  48  *
  49  * Redistribution and use in source and binary forms, with or without
  50  * modification, are permitted provided that the following conditions
  51  * are met:
  52  * 1. Redistributions of source code must retain the above copyright
  53  *    notice, this list of conditions and the following disclaimer.
  54  * 2. Redistributions in binary form must reproduce the above copyright
  55  *    notice, this list of conditions and the following disclaimer in the
  56  *    documentation and/or other materials provided with the distribution.
  57  * 3. All advertising materials mentioning features or use of this software
  58  *    must display the following acknowledgement:
  59  *      This product includes software developed by Mark Brinicombe.
  60  * 4. The name of the company nor the name of the author may be used to
  61  *    endorse or promote products derived from this software without specific
  62  *    prior written permission.
  63  *
  64  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  65  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  66  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  67  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  68  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  69  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  70  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  71  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  72  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  73  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  74  * SUCH DAMAGE.
  75  */
  76
  77 /*
  78  * bus_space functions for Gemini processor.
  79  */
  80
  81 #include <sys/cdefs.h>
  82 __KERNEL_RCSID(0, "$NetBSD: gemini_space.c,v 1.1 2008/10/24 04:23:18 matt Exp $");
  83
  84 #include <sys/param.h>
  85 #include <sys/systm.h>
  86
  87 #include <uvm/uvm_extern.h>
  88
  89 #include <machine/bus.h>
  90
  91 /* Prototypes for all the bus_space structure functions */
  92 bs_protos(gemini);
  93 bs_protos(generic);
  94 bs_protos(generic_armv4);
  95 bs_protos(bs_notimpl);
  96
  97 struct bus_space gemini_bs_tag = {
  98         /* cookie */
  99         (void *) 0,
 100
 101         /* mapping/unmapping */
 102         gemini_bs_map,
 103         gemini_bs_unmap,
 104         gemini_bs_subregion,
 105
 106         /* allocation/deallocation */
 107         gemini_bs_alloc,        /* not implemented */
 108         gemini_bs_free,         /* not implemented */
 109
 110         /* get kernel virtual address */
 111         gemini_bs_vaddr,
 112
 113         /* mmap */
 114         bs_notimpl_bs_mmap,
 115
 116         /* barrier */
 117         gemini_bs_barrier,
 118
 119         /* read (single) */
 120         generic_bs_r_1,
 121         generic_armv4_bs_r_2,
 122         generic_bs_r_4,
 123         bs_notimpl_bs_r_8,
 124
 125         /* read multiple */
 126         generic_bs_rm_1,
 127         generic_armv4_bs_rm_2,
 128         generic_bs_rm_4,
 129         bs_notimpl_bs_rm_8,
 130
 131         /* read region */
 132         generic_bs_rr_1,
 133         generic_armv4_bs_rr_2,
 134         generic_bs_rr_4,
 135         bs_notimpl_bs_rr_8,
 136
 137         /* write (single) */
 138         generic_bs_w_1,
 139         generic_armv4_bs_w_2,
 140         generic_bs_w_4,
 141         bs_notimpl_bs_w_8,
 142
 143         /* write multiple */
 144         generic_bs_wm_1,
 145         generic_armv4_bs_wm_2,
 146         generic_bs_wm_4,
 147         bs_notimpl_bs_wm_8,
 148
 149         /* write region */
 150         generic_bs_wr_1,
 151         generic_armv4_bs_wr_2,
 152         generic_bs_wr_4,
 153         bs_notimpl_bs_wr_8,
 154
 155         /* set multiple */
 156         bs_notimpl_bs_sm_1,
 157         bs_notimpl_bs_sm_2,
 158         bs_notimpl_bs_sm_4,
 159         bs_notimpl_bs_sm_8,
 160
 161         /* set region */
 162         generic_bs_sr_1,
 163         generic_armv4_bs_sr_2,
 164         bs_notimpl_bs_sr_4,
 165         bs_notimpl_bs_sr_8,
 166
 167         /* copy */
 168         bs_notimpl_bs_c_1,
 169         generic_armv4_bs_c_2,
 170         bs_notimpl_bs_c_4,
 171         bs_notimpl_bs_c_8,
 172 };
 173
 174 int
 175 gemini_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
 176               int flag, bus_space_handle_t *bshp)
 177 {
 178         u_long startpa, endpa, pa;
 179         vaddr_t va;
 180         pt_entry_t *pte;
 181         const struct pmap_devmap        *pd;
 182
 183         if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
 184                 /* Device was statically mapped. */
 185                 *bshp = pd->pd_va + (bpa - pd->pd_pa);
 186                 return 0;
 187         }
 188
 189         startpa = trunc_page(bpa);
 190         endpa = round_page(bpa + size);
 191
 192         /* XXX use extent manager to check duplicate mapping */
 193
 194         va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
 195             UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
 196         if (! va)
 197                 return(ENOMEM);
 198
 199         *bshp = (bus_space_handle_t)(va + (bpa - startpa));
 200
 201         for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
 202                 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0);
 203                 if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
 204                         pte = vtopte(va);
 205                         *pte &= ~L2_S_CACHE_MASK;
 206                         PTE_SYNC(pte);
 207                         /* XXX: pmap_kenter_pa() also does PTE_SYNC(). a bit of
 208                          *      waste.
 209                          */
 210                 }
 211         }
 212         pmap_update(pmap_kernel());
 213
 214         return(0);
 215 }
 216
 217 void
 218 gemini_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
 219 {
 220         vaddr_t va;
 221         vsize_t sz;
 222
 223         if (pmap_devmap_find_va(bsh, size) != NULL) {
 224                 /* Device was statically mapped; nothing to do. */
 225                 return;
 226         }
 227
 228         va = trunc_page(bsh);
 229         sz = round_page(bsh + size) - va;
 230
 231         pmap_kremove(va, sz);
 232         pmap_update(pmap_kernel());
 233         uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY);
 234 }
 235
 236
 237 int
 238 gemini_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
 239     bus_size_t size, bus_space_handle_t *nbshp)
 240 {
 241
 242         *nbshp = bsh + offset;
 243         return (0);
 244 }
 245
 246 void
 247 gemini_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
 248     bus_size_t len, int flags)
 249 {
 250
 251         /* Nothing to do. */
 252 }
 253
 254 void *
 255 gemini_bs_vaddr(void *t, bus_space_handle_t bsh)
 256 {
 257
 258         return ((void *)bsh);
 259 }
 260
 261
 262 int
 263 gemini_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
 264     bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
 265     bus_addr_t *bpap, bus_space_handle_t *bshp)
 266 {
 267
 268         panic("gemini_io_bs_alloc(): not implemented\n");
 269 }
 270
 271 void
 272 gemini_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
 273 {
 274
 275         panic("gemini_io_bs_free(): not implemented\n");
 276 }
 277