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bus.h revision 1.29.30.1 
      1 /*	$NetBSD: bus.h,v 1.29.30.1 2020/04/13 08:03:31 martin 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 _AMIGA_BUS_H_
     28 #define _AMIGA_BUS_H_
     29 
     30 #include <sys/types.h>
     31 
     32 /* for public use: */
     33 
     34 /*
     35  * Memory addresses (in bus space)
     36  */
     37 
     38 typedef u_int32_t bus_addr_t;
     39 typedef u_int32_t bus_size_t;
     40 
     41 #define PRIxBUSADDR	"x"
     42 #define PRIxBUSSIZE	"x"
     43 #define PRIuBUSSIZE	"u"
     44 
     45 /*
     46  * Access methods for bus resources and address space.
     47  */
     48 typedef struct bus_space_tag *bus_space_tag_t;
     49 typedef u_long	bus_space_handle_t;
     50 
     51 #define PRIxBSH		"lx"
     52 
     53 /* unpublic, but needed by method implementors */
     54 
     55 /*
     56  * Lazyness macros for function declarations.
     57  */
     58 
     59 #define bsr(what, typ) \
     60 	typ (what)(bus_space_handle_t, bus_addr_t)
     61 
     62 #define bsw(what, typ) \
     63 	void (what)(bus_space_handle_t, bus_addr_t, unsigned)
     64 
     65 #define bsrm(what, typ) \
     66 	void (what)(bus_space_handle_t, bus_size_t, typ *, bus_size_t)
     67 
     68 #define bswm(what, typ) \
     69 	void (what)(bus_space_handle_t, bus_size_t, const typ *, bus_size_t)
     70 
     71 #define bssr(what, typ) \
     72 	void (what)(bus_space_handle_t, bus_size_t, unsigned, bus_size_t)
     73 
     74 #define bscr(what, typ) \
     75 	void (what)(bus_space_handle_t, bus_size_t, \
     76 		    bus_space_handle_t, bus_size_t, bus_size_t)
     77 
     78 /*
     79  * Implementation specific structures.
     80  * XXX Don't use outside of bus_space definitions!
     81  * XXX maybe this should be encapsuled in a non-global .h file?
     82  */
     83 
     84 struct bus_space_tag {
     85 	bus_addr_t	base;
     86 	const struct amiga_bus_space_methods *absm;
     87 };
     88 
     89 struct amiga_bus_space_methods {
     90 
     91 	/* map, unmap, etc */
     92 
     93 	int (*bsm)(bus_space_tag_t,
     94 		bus_addr_t, bus_size_t, int, bus_space_handle_t *);
     95 
     96 	int (*bsms)(bus_space_handle_t,
     97 		bus_size_t, bus_size_t, bus_space_handle_t *);
     98 
     99 	void (*bsu)(bus_space_handle_t, bus_size_t);
    100 
    101 	/* placeholders for currently not implemented alloc and free */
    102 
    103 	void *bsa;
    104 	void *bsf;
    105 
    106 	/* 8 bit methods */
    107 
    108 	bsr(*bsr1, u_int8_t);
    109 	bsw(*bsw1, u_int8_t);
    110 	bsrm(*bsrm1, u_int8_t);
    111 	bswm(*bswm1, u_int8_t);
    112 	bsrm(*bsrr1, u_int8_t);
    113 	bswm(*bswr1, u_int8_t);
    114 	bssr(*bssr1, u_int8_t);
    115 	bscr(*bscr1, u_int8_t);
    116 
    117 	/* 16bit methods */
    118 
    119 	bsr(*bsr2, u_int16_t);
    120 	bsw(*bsw2, u_int16_t);
    121 	bsr(*bsrs2, u_int16_t);
    122 	bsw(*bsws2, u_int16_t);
    123 	bsrm(*bsrm2, u_int16_t);
    124 	bswm(*bswm2, u_int16_t);
    125 	bsrm(*bsrms2, u_int16_t);
    126 	bswm(*bswms2, u_int16_t);
    127 	bsrm(*bsrr2, u_int16_t);
    128 	bswm(*bswr2, u_int16_t);
    129 	bsrm(*bsrrs2, u_int16_t);
    130 	bswm(*bswrs2, u_int16_t);
    131 	bssr(*bssr2, u_int16_t);
    132 	bscr(*bscr2, u_int16_t);
    133 
    134 	/* 32bit methods */
    135 
    136 	bsr(*bsr4, u_int32_t);
    137 	bsw(*bsw4, u_int32_t);
    138 	bsr(*bsrs4, u_int32_t);
    139 	bsw(*bsws4, u_int32_t);
    140 	bsrm(*bsrm4, u_int32_t);
    141 	bswm(*bswm4, u_int32_t);
    142 	bsrm(*bsrms4, u_int32_t);
    143 	bswm(*bswms4, u_int32_t);
    144 	bsrm(*bsrr4, u_int32_t);
    145 	bswm(*bswr4, u_int32_t);
    146 	bsrm(*bsrrs4, u_int32_t);
    147 	bswm(*bswrs4, u_int32_t);
    148 	bssr(*bssr4, u_int32_t);
    149 	bscr(*bscr4, u_int32_t);
    150 
    151 };
    152 
    153 /*
    154  * Macro definition of map, unmap, etc.
    155  */
    156 
    157 #define bus_space_map(t, o, s, f, hp) \
    158 	((t)->absm->bsm)((t), (o), (s), (f), (hp))
    159 
    160 #define bus_space_subregion(t, h, o, s, hp) \
    161 	((t)->absm->bsms)((h), (o), (s), (hp))
    162 
    163 #define bus_space_unmap(t, h, s) \
    164 	((t)->absm->bsu)((h), (s))
    165 
    166 /*
    167  * Macro definition of _2 functions as indirect method array calls
    168  */
    169 
    170 /* 0: Helper macros */
    171 
    172 #define dbsdr(n, t, h, o)	((t)->absm->n)((h), (o))
    173 #define dbsdw(n, t, h, o, v)	((t)->absm->n)((h), (o), (v))
    174 #define dbsm(n, t, h, o, p, c)	((t)->absm->n)((h), (o), (p), (c))
    175 #define dbss(n, t, h, o, v, c)	((t)->absm->n)((h), (o), (v), (c))
    176 #define dbsc(n, t, h, o, v, c)	((t)->absm->n)((h), (o), (v), (c))
    177 
    178 /* 1: byte-wide "functions" */
    179 
    180 #define bus_space_read_1(t, h, o)		  dbsdr(bsr1, t, h, o)
    181 #define bus_space_write_1(t, h, o, v)		  dbsdw(bsw1, t, h, o, v)
    182 
    183 #define bus_space_read_multi_1(t, h, o, p, c)	  dbsm(bsrm1, t, h, o, p, c)
    184 #define bus_space_write_multi_1(t, h, o, p, c)	  dbsm(bswm1, t, h, o, p, c)
    185 
    186 #define bus_space_read_region_1(t, h, o, p, c)	  dbsm(bsrr1, t, h, o, p, c)
    187 #define bus_space_write_region_1(t, h, o, p, c)	  dbsm(bswr1, t, h, o, p, c)
    188 
    189 #define bus_space_set_region_1(t, h, o, v, c)	  dbss(bssr1, t, h, o, v, c)
    190 #define bus_space_copy_region_1(t, h, o, g, q, c) dbss(bscr1, t, h, o, g, q, c)
    191 
    192 
    193 /* 2: word-wide "functions" */
    194 
    195 #define bus_space_read_2(t, h, o)		  dbsdr(bsr2, t, h, o)
    196 #define bus_space_write_2(t, h, o, v)		  dbsdw(bsw2, t, h, o, v)
    197 #define bus_space_read_stream_2(t, h, o)	  dbsdr(bsrs2, t, h, o)
    198 #define bus_space_write_stream_2(t, h, o, v)	  dbsdw(bsws2, t, h, o, v)
    199 
    200 #define bus_space_read_multi_2(t, h, o, p, c)	  dbsm(bsrm2, t, h, o, p, c)
    201 #define bus_space_write_multi_2(t, h, o, p, c)	  dbsm(bswm2, t, h, o, p, c)
    202 
    203 #define bus_space_read_multi_stream_2(t, h, o, p, c) \
    204 						  dbsm(bsrms2, t, h, o, p, c)
    205 
    206 #define bus_space_write_multi_stream_2(t, h, o, p, c) \
    207 						  dbsm(bswms2, t, h, o, p, c)
    208 
    209 #define bus_space_read_region_2(t, h, o, p, c)	  dbsm(bsrr2, t, h, o, p, c)
    210 #define bus_space_write_region_2(t, h, o, p, c)	  dbsm(bswr2, t, h, o, p, c)
    211 
    212 #define bus_space_read_region_stream_2(t, h, o, p, c) \
    213 						  dbsm(bsrrs2, t, h, o, p, c)
    214 
    215 #define bus_space_write_region_stream_2(t, h, o, p, c) \
    216 						  dbsm(bswrs2, t, h, o, p, c)
    217 
    218 #define bus_space_set_region_2(t, h, o, v, c)	  dbss(bssr2, t, h, o, v, c)
    219 #define bus_space_copy_region_2(t, h, o, g, q, c) dbss(bscr2, t, h, o, g, q, c)
    220 
    221 /* 4: long-wide "functions" */
    222 
    223 #define bus_space_read_4(t, h, o)                 dbsdr(bsr4, t, h, o)
    224 #define bus_space_write_4(t, h, o, v)             dbsdw(bsw4, t, h, o, v)
    225 #define bus_space_read_stream_4(t, h, o)          dbsdr(bsrs4, t, h, o)
    226 #define bus_space_write_stream_4(t, h, o, v)      dbsdw(bsws4, t, h, o, v)
    227 
    228 #define bus_space_read_multi_4(t, h, o, p, c)     dbsm(bsrm4, t, h, o, p, c)
    229 #define bus_space_write_multi_4(t, h, o, p, c)    dbsm(bswm4, t, h, o, p, c)
    230 
    231 #define bus_space_read_multi_stream_4(t, h, o, p, c) \
    232                                                   dbsm(bsrms4, t, h, o, p, c)
    233 
    234 #define bus_space_write_multi_stream_4(t, h, o, p, c) \
    235                                                   dbsm(bswms4, t, h, o, p, c)
    236 
    237 #define bus_space_read_region_4(t, h, o, p, c)    dbsm(bsrr4, t, h, o, p, c)
    238 #define bus_space_write_region_4(t, h, o, p, c)   dbsm(bswr4, t, h, o, p, c)
    239 
    240 #define bus_space_read_region_stream_4(t, h, o, p, c) \
    241                                                   dbsm(bsrrs4, t, h, o, p, c)
    242 
    243 #define bus_space_write_region_stream_4(t, h, o, p, c) \
    244                                                   dbsm(bswrs4, t, h, o, p, c)
    245 
    246 #define bus_space_set_region_4(t, h, o, v, c)     dbss(bssr4, t, h, o, v, c)
    247 #define bus_space_copy_region_4(t, h, o, g, q, c) dbss(bscr4, t, h, o, g, q, c)
    248 
    249 /*
    250  * Bus read/write barrier methods.
    251  *
    252  *      void bus_space_barrier(bus_space_tag_t tag,
    253  *          bus_space_handle_t bsh, bus_size_t offset,
    254  *          bus_size_t len, int flags);
    255  *
    256  * Note: the 680x0 does not currently require barriers, but we must
    257  * provide the flags to MI code.
    258  */
    259 void bus_space_barrier(bus_space_tag_t space, bus_space_handle_t handle,
    260 			bus_size_t offset, bus_size_t length, int flags);
    261 
    262 #define BUS_SPACE_BARRIER_READ  0x01            /* force read barrier */
    263 #define BUS_SPACE_BARRIER_WRITE 0x02            /* force write barrier */
    264 
    265 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
    266 
    267 #define __BUS_SPACE_HAS_STREAM_METHODS
    268 
    269 paddr_t bus_space_mmap(bus_space_tag_t t, bus_addr_t addr, off_t off, int prot,
    270 			int flags);
    271 
    272 #define BUS_SPACE_MAP_CACHEABLE		0x01
    273 #define BUS_SPACE_MAP_LINEAR		0x02
    274 #define BUS_SPACE_MAP_PREFETCHABLE	0x04
    275 
    276 /* Instruction for enforcing reorder protection. Nothing for 68k. */
    277 #define amiga_bus_reorder_protect()
    278 
    279 void * bus_space_vaddr(bus_space_tag_t space, bus_space_handle_t handle);
    280 
    281 extern const struct amiga_bus_space_methods amiga_bus_stride_1;
    282 extern const struct amiga_bus_space_methods amiga_bus_stride_1swap;
    283 extern const struct amiga_bus_space_methods amiga_bus_stride_1swap_abs;
    284 extern const struct amiga_bus_space_methods amiga_bus_stride_2;
    285 extern const struct amiga_bus_space_methods amiga_bus_stride_4;
    286 extern const struct amiga_bus_space_methods amiga_bus_stride_4swap;
    287 extern const struct amiga_bus_space_methods amiga_bus_stride_16;
    288 extern const struct amiga_bus_space_methods amiga_bus_stride_0x1000;
    289 extern const struct amiga_bus_space_methods amiga_bus_stride_0x4000;
    290 extern const struct amiga_bus_space_methods empb_bus_swap;
    291 
    292 /*
    293  * XXX
    294  * amiga doesn't have actual bus_dma(9) implementation for PCI devices yet.
    295  */
    296 #include <m68k/bus_dma.h>
    297 
    298 #endif /* _AMIGA_BUS_H_ */
    299 
    300