1 /* $NetBSD: bus_space.c,v 1.6 2002/09/27 15:36:02 provos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Implementation of bus_space mapping for the hp300. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.6 2002/09/27 15:36:02 provos Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/extent.h> 49 50 #include <machine/autoconf.h> 51 #include <machine/bus.h> 52 53 #include <uvm/uvm_extern.h> 54 55 extern char *extiobase; 56 extern int *nofault; 57 58 /* ARGSUSED */ 59 int 60 bus_space_map(t, bpa, size, flags, bshp) 61 bus_space_tag_t t; 62 bus_addr_t bpa; 63 bus_size_t size; 64 int flags; 65 bus_space_handle_t *bshp; 66 { 67 u_long kva; 68 int error; 69 70 if (t == HP300_BUS_SPACE_INTIO) { 71 /* 72 * Intio space is direct-mapped in pmap_bootstrap(); just 73 * do the translation. 74 */ 75 *bshp = (bus_space_handle_t)IIOV(INTIOBASE + bpa); 76 return (0); 77 } 78 79 if (t != HP300_BUS_SPACE_DIO) 80 panic("bus_space_map: bad space tag"); 81 82 /* 83 * Allocate virtual address space from the extio extent map. 84 */ 85 size = m68k_round_page(size); 86 error = extent_alloc(extio_ex, size, PAGE_SIZE, 0, 87 EX_FAST | EX_NOWAIT | (extio_ex_malloc_safe ? EX_MALLOCOK : 0), 88 &kva); 89 if (error) 90 return (error); 91 92 /* 93 * Map the range. The range is always cache-inhibited on the hp300. 94 */ 95 physaccess((caddr_t)kva, (caddr_t)bpa, size, PG_RW|PG_CI); 96 97 /* 98 * All done. 99 */ 100 *bshp = (bus_space_handle_t)kva; 101 return (0); 102 } 103 104 /* ARGSUSED */ 105 int 106 bus_space_alloc(t, rstart, rend, size, alignment, boundary, flags, 107 bpap, bshp) 108 bus_space_tag_t t; 109 bus_addr_t rstart, rend; 110 bus_size_t size, alignment, boundary; 111 int flags; 112 bus_addr_t *bpap; 113 bus_space_handle_t *bshp; 114 { 115 116 /* 117 * Not meaningful on any currently-supported hp300 bus. 118 */ 119 return (EINVAL); 120 } 121 122 /* ARGSUSED */ 123 void 124 bus_space_free(t, bsh, size) 125 bus_space_tag_t t; 126 bus_space_handle_t bsh; 127 bus_size_t size; 128 { 129 130 /* 131 * Not meaningful on any currently-supported hp300 bus. 132 */ 133 panic("bus_space_free: shouldn't be here"); 134 } 135 136 void 137 bus_space_unmap(t, bsh, size) 138 bus_space_tag_t t; 139 bus_space_handle_t bsh; 140 bus_size_t size; 141 { 142 143 if (t == HP300_BUS_SPACE_INTIO) { 144 /* 145 * Intio space is direct-mapped in pmap_bootstrap(); nothing 146 * to do 147 */ 148 return; 149 } 150 151 if (t != HP300_BUS_SPACE_DIO) 152 panic("bus_space_map: bad space tag"); 153 154 size = m68k_round_page(size); 155 156 #ifdef DIAGNOSTIC 157 if (bsh & PGOFSET) 158 panic("bus_space_unmap: unaligned"); 159 if ((caddr_t)bsh < extiobase || 160 (caddr_t)bsh >= (extiobase + ptoa(EIOMAPSIZE))) 161 panic("bus_space_unmap: bad bus space handle"); 162 #endif 163 164 /* 165 * Unmap the range. 166 */ 167 physunaccess((caddr_t)bsh, size); 168 169 /* 170 * Free it from the extio extent map. 171 */ 172 if (extent_free(extio_ex, (u_long) bsh, size, 173 EX_NOWAIT | (extio_ex_malloc_safe ? EX_MALLOCOK : 0))) 174 printf("bus_space_unmap: kva 0x%lx size 0x%lx: " 175 "can't free region\n", (u_long) bsh, size); 176 } 177 178 /* ARGSUSED */ 179 int 180 bus_space_subregion(t, bsh, offset, size, nbshp) 181 bus_space_tag_t t; 182 bus_space_handle_t bsh; 183 bus_size_t offset, size; 184 bus_space_handle_t *nbshp; 185 { 186 187 *nbshp = bsh + offset; 188 return (0); 189 } 190 191 /* ARGSUSED */ 192 int 193 hp300_bus_space_probe(t, bsh, offset, sz) 194 bus_space_tag_t t; 195 bus_space_handle_t bsh; 196 bus_size_t offset; 197 int sz; 198 { 199 label_t faultbuf; 200 int i; 201 202 nofault = (int *)&faultbuf; 203 if (setjmp((label_t *)nofault)) { 204 nofault = NULL; 205 return (0); 206 } 207 208 switch (sz) { 209 case 1: 210 i = bus_space_read_1(t, bsh, offset); 211 break; 212 213 case 2: 214 i = bus_space_read_2(t, bsh, offset); 215 break; 216 217 case 4: 218 i = bus_space_read_4(t, bsh, offset); 219 break; 220 221 default: 222 panic("bus_space_probe: unupported data size %d", sz); 223 /* NOTREACHED */ 224 } 225 226 nofault = NULL; 227 return (1); 228 } 229