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      1 /* $NetBSD: amiga_bus_simple_4.c,v 1.10 2011/10/30 08:33:43 rkujawa Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Ignatios Souvatzis.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(1, "$NetBSD: amiga_bus_simple_4.c,v 1.10 2011/10/30 08:33:43 rkujawa Exp $");
     34 
     35 #define AMIGA_SIMPLE_BUS_STRIDE 4		/* 1 byte per long */
     36 #define AMIGA_SIMPLE_BUS_WORD_METHODS
     37 #define AMIGA_SIMPLE_BUS_LONGWORD_METHODS
     38 
     39 #include "simple_busfuncs.c"
     40 
     41 /*
     42  * Little-endian word methods.
     43  * Stream access does not swap, used for 16-bit and 32-bit wide transfers
     44  * of byte streams. Non-stream access swaps bytes.
     45  * XXX Only *_multi_2 and *_multi_4 transfers currently swap bytes XXX
     46  */
     47 
     48 bsrm(oabs(bsrm2_swap_), u_int16_t);
     49 bswm(oabs(bswm2_swap_), u_int16_t);
     50 bsrm(oabs(bsrm4_swap_), u_int32_t);
     51 bswm(oabs(bswm4_swap_), u_int32_t);
     52 
     53 void
     54 oabs(bsrm2_swap_)(bus_space_handle_t handle, bus_size_t offset,
     55 		  u_int16_t *pointer, bus_size_t count)
     56 {
     57 	volatile u_int16_t *p;
     58 
     59 	p = (volatile u_int16_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
     60 
     61 	while (count > 0) {
     62 		*pointer++ = bswap16(*p);
     63 		amiga_bus_reorder_protect();
     64 		--count;
     65 	}
     66 }
     67 
     68 void
     69 oabs(bswm2_swap_)(bus_space_handle_t handle, bus_size_t offset,
     70 		  const u_int16_t *pointer, bus_size_t count)
     71 {
     72 	volatile u_int16_t *p;
     73 
     74 	p = (volatile u_int16_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
     75 
     76 	while (count > 0) {
     77 		*p = bswap16(*pointer);
     78 		amiga_bus_reorder_protect();
     79 		++pointer;
     80 		--count;
     81 	}
     82 }
     83 
     84 void
     85 oabs(bsrm4_swap_)(bus_space_handle_t handle, bus_size_t offset,
     86 		  u_int32_t *pointer, bus_size_t count)
     87 {
     88 	volatile u_int32_t *p;
     89 
     90 	p = (volatile u_int32_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
     91 
     92 	while (count > 0) {
     93 		*pointer++ = bswap32(*p);
     94 		amiga_bus_reorder_protect();
     95 		--count;
     96 	}
     97 }
     98 
     99 void
    100 oabs(bswm4_swap_)(bus_space_handle_t handle, bus_size_t offset,
    101 		  const u_int32_t *pointer, bus_size_t count)
    102 {
    103 	volatile u_int32_t *p;
    104 
    105 	p = (volatile u_int32_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
    106 
    107 	while (count > 0) {
    108 		*p = bswap32(*pointer);
    109 		amiga_bus_reorder_protect();
    110 		++pointer;
    111 		--count;
    112 	}
    113 }
    114 
    115 const struct amiga_bus_space_methods amiga_bus_stride_4swap = {
    116 
    117 	.bsm =		oabs(bsm_),
    118 	.bsms =		oabs(bsms_),
    119 	.bsu =		oabs(bsu_),
    120 	.bsa =		NULL,
    121 	.bsf =		NULL,
    122 
    123 	.bsr1 =		oabs(bsr1_),
    124 	.bsw1 =		oabs(bsw1_),
    125 	.bsrm1 =	oabs(bsrm1_),
    126 	.bswm1 =	oabs(bswm1_),
    127 	.bsrr1 =	oabs(bsrr1_),
    128 	.bswr1 =	oabs(bswr1_),
    129 	.bssr1 =	oabs(bssr1_),
    130 	.bscr1 =	oabs(bscr1_),
    131 
    132 	.bsr2 =		oabs(bsr2_),		/* XXX swap? */
    133 	.bsw2 =		oabs(bsw2_),		/* XXX swap? */
    134 	.bsrs2 =	oabs(bsr2_),
    135 	.bsws2 =	oabs(bsw2_),
    136 	.bsrm2 =	oabs(bsrm2_swap_),
    137 	.bswm2 =	oabs(bswm2_swap_),
    138 	.bsrms2 =	oabs(bsrm2_),
    139 	.bswms2 =	oabs(bswm2_),
    140 	.bsrr2 =	oabs(bsrr2_),		/* XXX swap? */
    141 	.bswr2 =	oabs(bswr2_),		/* XXX swap? */
    142 	.bsrrs2 =	oabs(bsrr2_),
    143 	.bswrs2 =	oabs(bswr2_),
    144 	.bssr2 =	oabs(bssr2_),		/* XXX swap? */
    145 	.bscr2 =	oabs(bscr2_),		/* XXX swap? */
    146 
    147 	.bsr4 =		oabs(bsr4_),		/* XXX swap? */
    148 	.bsw4 =		oabs(bsw4_),		/* XXX swap? */
    149 	.bsrs4 =	oabs(bsr4_),
    150 	.bsws4 =	oabs(bsw4_),
    151 	.bsrm4 =	oabs(bsrm4_swap_),
    152 	.bswm4 =	oabs(bswm4_swap_),
    153 	.bsrms4 =	oabs(bsrm4_),
    154 	.bswms4 =	oabs(bswm4_),
    155 	.bsrr4 =	oabs(bsrr4_),		/* XXX swap? */
    156 	.bswr4 =	oabs(bswr4_),		/* XXX swap? */
    157 	.bsrrs4 =	oabs(bsrr4_),
    158 	.bswrs4 =	oabs(bswr4_),
    159 	.bssr4 =	oabs(bssr4_),		/* XXX swap? */
    160 	.bscr4 =	oabs(bscr4_)		/* XXX swap? */
    161 };
    162 
    163