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footbridge_com_io.c revision 1.2 
      1 /*	$NetBSD: footbridge_com_io.c,v 1.2 2001/09/10 23:05:19 chris 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  *	for the NetBSD Project.
     20  * 4. The name of the company nor the name of the author may be used to
     21  *    endorse or promote products derived from this software without specific
     22  *    prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     25  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     27  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     28  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     29  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 /*
     38  * This file provides the bus space tag for the footbridge serial console
     39  */
     40 
     41 /*
     42  * bus_space I/O functions for mainbus
     43  */
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <machine/bus.h>
     48 
     49 /* Proto types for all the bus_space structure functions */
     50 
     51 bs_protos(fcomcons);
     52 bs_protos(bs_notimpl);
     53 
     54 /* Declare the fcomcons bus space tag */
     55 
     56 struct bus_space fcomcons_bs_tag = {
     57 	/* cookie */
     58 	NULL,
     59 
     60 	/* mapping/unmapping */
     61 	fcomcons_bs_map,
     62 	fcomcons_bs_unmap,
     63 	fcomcons_bs_subregion,
     64 
     65 	/* allocation/deallocation */
     66 	fcomcons_bs_alloc,
     67 	fcomcons_bs_free,
     68 
     69 	/* get kernel virtual address */
     70 	0, /* never used */
     71 
     72 	/* Mmap bus space for user */
     73 	bs_notimpl_bs_mmap,
     74 
     75 	/* barrier */
     76 	fcomcons_bs_barrier,
     77 
     78 	/* read (single) */
     79 	bs_notimpl_bs_r_1,
     80 	bs_notimpl_bs_r_2,
     81 	fcomcons_bs_r_4,
     82 	bs_notimpl_bs_r_8,
     83 
     84 	/* read multiple */
     85 	bs_notimpl_bs_rm_1,
     86 	bs_notimpl_bs_rm_2,
     87 	bs_notimpl_bs_rm_4,
     88 	bs_notimpl_bs_rm_8,
     89 
     90 	/* read region */
     91 	bs_notimpl_bs_rr_1,
     92 	bs_notimpl_bs_rr_2,
     93 	bs_notimpl_bs_rr_4,
     94 	bs_notimpl_bs_rr_8,
     95 
     96 	/* write (single) */
     97 	bs_notimpl_bs_w_1,
     98 	bs_notimpl_bs_w_2,
     99 	fcomcons_bs_w_4,
    100 	bs_notimpl_bs_w_8,
    101 
    102 	/* write multiple */
    103 	bs_notimpl_bs_wm_1,
    104 	bs_notimpl_bs_wm_2,
    105 	bs_notimpl_bs_wm_4,
    106 	bs_notimpl_bs_wm_8,
    107 
    108 	/* write region */
    109 	bs_notimpl_bs_wr_1,
    110 	bs_notimpl_bs_wr_2,
    111 	bs_notimpl_bs_wr_4,
    112 	bs_notimpl_bs_wr_8,
    113 
    114 	bs_notimpl_bs_sm_1,
    115 	bs_notimpl_bs_sm_2,
    116 	bs_notimpl_bs_sm_4,
    117 	bs_notimpl_bs_sm_8,
    118 
    119 	/* set region */
    120 	bs_notimpl_bs_sr_1,
    121 	bs_notimpl_bs_sr_2,
    122 	bs_notimpl_bs_sr_4,
    123 	bs_notimpl_bs_sr_8,
    124 
    125 	/* copy */
    126 	bs_notimpl_bs_c_1,
    127 	bs_notimpl_bs_c_2,
    128 	bs_notimpl_bs_c_4,
    129 	bs_notimpl_bs_c_8,
    130 };
    131 
    132 /* bus space functions */
    133 
    134 int
    135 fcomcons_bs_map(t, bpa, size, cacheable, bshp)
    136 	void *t;
    137 	bus_addr_t bpa;
    138 	bus_size_t size;
    139 	int cacheable;
    140 	bus_space_handle_t *bshp;
    141 {
    142 	/*
    143 	 * Temporary implementation as all I/O is already mapped etc.
    144 	 *
    145 	 * Eventually this function will do the mapping check for multiple maps
    146 	 */
    147 	*bshp = bpa;
    148 	return(0);
    149 	}
    150 
    151 int
    152 fcomcons_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
    153     bpap, bshp)
    154 	void *t;
    155 	bus_addr_t rstart, rend;
    156 	bus_size_t size, alignment, boundary;
    157 	int cacheable;
    158 	bus_addr_t *bpap;
    159 	bus_space_handle_t *bshp;
    160 {
    161 	panic("fcomcons_alloc(): Help!\n");
    162 }
    163 
    164 
    165 void
    166 fcomcons_bs_unmap(t, bsh, size)
    167 	void *t;
    168 	bus_space_handle_t bsh;
    169 	bus_size_t size;
    170 {
    171 	/*
    172 	 * Temporary implementation
    173 	 */
    174 }
    175 
    176 void
    177 fcomcons_bs_free(t, bsh, size)
    178 	void *t;
    179 	bus_space_handle_t bsh;
    180 	bus_size_t size;
    181 {
    182 
    183 	panic("fcomcons_free(): Help!\n");
    184 	/* fcomcons_unmap() does all that we need to do. */
    185 /*	fcomcons_unmap(t, bsh, size);*/
    186 }
    187 
    188 int
    189 fcomcons_bs_subregion(t, bsh, offset, size, nbshp)
    190 	void *t;
    191 	bus_space_handle_t bsh;
    192 	bus_size_t offset, size;
    193 	bus_space_handle_t *nbshp;
    194 {
    195 
    196 	*nbshp = bsh + offset;
    197 	return (0);
    198 }
    199 
    200 void
    201 fcomcons_bs_barrier(t, bsh, offset, len, flags)
    202 	void *t;
    203 	bus_space_handle_t bsh;
    204 	bus_size_t offset, len;
    205 	int flags;
    206 {
    207 }
    208 
    209 /* End of footbridge_com_io.c */
    210