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bus_defs.h revision 1.2 
      1 /*	$NetBSD: bus_defs.h,v 1.2 2011/07/25 15:58:44 dyoung Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Leo Weppelman.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef _AMIGAPPC_BUS_DEFS_H_
     28 #define _AMIGAPPC_BUS_DEFS_H_
     29 
     30 #include <sys/types.h>
     31 
     32 /* for public use: */
     33 
     34 /*
     35  * Memory addresses (in bus space)
     36  */
     37 
     38 typedef uint32_t bus_addr_t;
     39 typedef uint32_t bus_size_t;
     40 
     41 /*
     42  * Access methods for bus resources and address space.
     43  */
     44 typedef struct bus_space_tag *bus_space_tag_t;
     45 typedef u_long	bus_space_handle_t;
     46 
     47 /* unpublic, but needed by method implementors */
     48 
     49 /*
     50  * Lazyness macros for function declarations.
     51  */
     52 
     53 #define bsr(what, typ) \
     54 	typ (what)(bus_space_handle_t, bus_addr_t)
     55 
     56 #define bsw(what, typ) \
     57 	void (what)(bus_space_handle_t, bus_addr_t, unsigned)
     58 
     59 #define bsrm(what, typ) \
     60 	void (what)(bus_space_handle_t, bus_size_t, typ *, bus_size_t)
     61 
     62 #define bswm(what, typ) \
     63 	void (what)(bus_space_handle_t, bus_size_t, const typ *, bus_size_t)
     64 
     65 #define bssr(what, typ) \
     66 	void (what)(bus_space_handle_t, bus_size_t, unsigned, bus_size_t)
     67 
     68 #define bscr(what, typ) \
     69 	void (what)(bus_space_handle_t, bus_size_t, \
     70 		    bus_space_handle_t, bus_size_t, bus_size_t)
     71 
     72 /*
     73  * Implementation specific structures.
     74  * XXX Don't use outside of bus_space definitions!
     75  * XXX maybe this should be encapsuled in a non-global .h file?
     76  */
     77 
     78 struct bus_space_tag {
     79 	bus_addr_t	base;
     80 	const struct amiga_bus_space_methods *absm;
     81 };
     82 
     83 struct amiga_bus_space_methods {
     84 
     85 	/* map, unmap, etc */
     86 
     87 	int (*bsm)(bus_space_tag_t,
     88 		bus_addr_t, bus_size_t, int, bus_space_handle_t *);
     89 
     90 	int (*bsms)(bus_space_handle_t,
     91 		bus_size_t, bus_size_t, bus_space_handle_t *);
     92 
     93 	void (*bsu)(bus_space_handle_t, bus_size_t);
     94 
     95 	/* placeholders for currently not implemented alloc and free */
     96 
     97 	void *bsa;
     98 	void *bsf;
     99 
    100 	/* 8 bit methods */
    101 
    102 	bsr(*bsr1, uint8_t);
    103 	bsw(*bsw1, uint8_t);
    104 	bsrm(*bsrm1, uint8_t);
    105 	bswm(*bswm1, uint8_t);
    106 	bsrm(*bsrr1, uint8_t);
    107 	bswm(*bswr1, uint8_t);
    108 	bssr(*bssr1, uint8_t);
    109 	bscr(*bscr1, uint8_t);
    110 
    111 	/* 16bit methods */
    112 
    113 	bsr(*bsr2, uint16_t);
    114 	bsw(*bsw2, uint16_t);
    115 	bsr(*bsrs2, uint16_t);
    116 	bsw(*bsws2, uint16_t);
    117 	bsrm(*bsrm2, uint16_t);
    118 	bswm(*bswm2, uint16_t);
    119 	bsrm(*bsrms2, uint16_t);
    120 	bswm(*bswms2, uint16_t);
    121 	bsrm(*bsrr2, uint16_t);
    122 	bswm(*bswr2, uint16_t);
    123 	bsrm(*bsrrs2, uint16_t);
    124 	bswm(*bswrs2, uint16_t);
    125 	bssr(*bssr2, uint16_t);
    126 	bscr(*bscr2, uint16_t);
    127 
    128 	/* add 32bit methods here */
    129 };
    130 
    131 #define BUS_SPACE_BARRIER_READ  0x01            /* force read barrier */
    132 #define BUS_SPACE_BARRIER_WRITE 0x02            /* force write barrier */
    133 
    134 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
    135 
    136 #define __BUS_SPACE_HAS_STREAM_METHODS
    137 
    138 extern const struct amiga_bus_space_methods amiga_bus_stride_1;
    139 extern const struct amiga_bus_space_methods amiga_bus_stride_2;
    140 extern const struct amiga_bus_space_methods amiga_bus_stride_4;
    141 extern const struct amiga_bus_space_methods amiga_bus_stride_4swap;
    142 extern const struct amiga_bus_space_methods amiga_bus_stride_16;
    143 
    144 #endif /* _AMIGAPPC_BUS_DEFS_H_ */
    145