sys/arch/arm/iomd/iomd_io.c

   1 /*      $NetBSD: iomd_io.c,v 1.4 2005/12/11 12:16:47 christos Exp $     */
   2
   3 /*
   4  * Copyright (c) 1997 Mark Brinicombe.
   5  * Copyright (c) 1997 Causality Limited.
   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 Mark Brinicombe.
  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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  29  * 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 /*
  37  * bus_space I/O functions for iomd
  38  */
  39
  40 #include <sys/cdefs.h>
  41 __KERNEL_RCSID(0, "$NetBSD: iomd_io.c,v 1.4 2005/12/11 12:16:47 christos Exp $");
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <machine/bus.h>
  46
  47 /* Proto types for all the bus_space structure functions */
  48
  49 bs_protos(iomd);
  50 bs_protos(bs_notimpl);
  51
  52 /* Declare the iomd bus space tag */
  53
  54 struct bus_space iomd_bs_tag = {
  55         /* cookie */
  56         NULL,
  57
  58         /* mapping/unmapping */
  59         iomd_bs_map,
  60         iomd_bs_unmap,
  61         iomd_bs_subregion,
  62
  63         /* allocation/deallocation */
  64         iomd_bs_alloc,
  65         iomd_bs_free,
  66
  67         /* get kernel virtual address */
  68         0, /* there is no linear mapping */
  69
  70         /* mmap bus space for userland */
  71         bs_notimpl_bs_mmap,     /* XXX correct? XXX */
  72
  73         /* barrier */
  74         iomd_bs_barrier,
  75
  76         /* read (single) */
  77         iomd_bs_r_1,
  78         iomd_bs_r_2,
  79         iomd_bs_r_4,
  80         bs_notimpl_bs_r_8,
  81
  82         /* read multiple */
  83         bs_notimpl_bs_rm_1,
  84         iomd_bs_rm_2,
  85         bs_notimpl_bs_rm_4,
  86         bs_notimpl_bs_rm_8,
  87
  88         /* read region */
  89         bs_notimpl_bs_rr_1,
  90         bs_notimpl_bs_rr_2,
  91         bs_notimpl_bs_rr_4,
  92         bs_notimpl_bs_rr_8,
  93
  94         /* write (single) */
  95         iomd_bs_w_1,
  96         iomd_bs_w_2,
  97         iomd_bs_w_4,
  98         bs_notimpl_bs_w_8,
  99
 100         /* write multiple */
 101         bs_notimpl_bs_wm_1,
 102         iomd_bs_wm_2,
 103         bs_notimpl_bs_wm_4,
 104         bs_notimpl_bs_wm_8,
 105
 106         /* write region */
 107         bs_notimpl_bs_wr_1,
 108         bs_notimpl_bs_wr_2,
 109         bs_notimpl_bs_wr_4,
 110         bs_notimpl_bs_wr_8,
 111
 112         /* set multiple */
 113         bs_notimpl_bs_sm_1,
 114         bs_notimpl_bs_sm_2,
 115         bs_notimpl_bs_sm_4,
 116         bs_notimpl_bs_sm_8,
 117
 118         /* set region */
 119         bs_notimpl_bs_sr_1,
 120         bs_notimpl_bs_sr_2,
 121         bs_notimpl_bs_sr_4,
 122         bs_notimpl_bs_sr_8,
 123
 124         /* copy */
 125         bs_notimpl_bs_c_1,
 126         bs_notimpl_bs_c_2,
 127         bs_notimpl_bs_c_4,
 128         bs_notimpl_bs_c_8,
 129 };
 130
 131 /* bus space functions */
 132
 133 int
 134 iomd_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable,
 135     bus_space_handle_t *bshp)
 136 {
 137
 138         /*
 139          * Temporary implementation as all I/O is already mapped etc.
 140          *
 141          * Eventually this function will do the mapping check for multiple maps
 142          */
 143         *bshp = bpa;
 144         return 0;
 145 }
 146
 147 int
 148 iomd_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
 149     bus_size_t alignment, bus_size_t boundary, int cacheable, bus_addr_t *bpap,
 150     bus_space_handle_t *bshp)
 151 {
 152
 153         panic("iomd_alloc(): Help!");
 154 }
 155
 156
 157 void
 158 iomd_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
 159 {
 160
 161         /*
 162          * Temporary implementation
 163          */
 164 }
 165
 166 void
 167 iomd_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
 168 {
 169
 170         panic("iomd_free(): Help!");
 171         /* iomd_unmap() does all that we need to do. */
 172 /*      iomd_unmap(t, bsh, size);*/
 173 }
 174
 175 int
 176 iomd_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
 177     bus_size_t size, bus_space_handle_t *nbshp)
 178 {
 179
 180         *nbshp = bsh + (offset << 2);
 181         return 0;
 182 }
 183
 184 void
 185 iomd_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
 186     bus_size_t len, int flags)
 187 {
 188
 189 }
 190
 191 /* End of iomd_io.c */