1 /* $NetBSD: bus_space.c,v 1.22 2023/04/21 23:01:59 tsutsui 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 * 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 /* 33 * Implementation of bus_space mapping for the hp300. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.22 2023/04/21 23:01:59 tsutsui Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/extent.h> 42 43 #include <machine/autoconf.h> 44 #include <machine/bus.h> 45 46 #include <uvm/uvm_extern.h> 47 48 extern int *nofault; 49 50 int 51 bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, int flags, 52 bus_space_handle_t *bshp) 53 { 54 vaddr_t kva; 55 vsize_t offset; 56 int error; 57 58 if (t->bustype == HP300_BUS_SPACE_INTIO) { 59 /* 60 * Intio space is direct-mapped in pmap_bootstrap(); just 61 * do the translation. 62 */ 63 *bshp = (bus_space_handle_t)IIOV(INTIOBASE + bpa); 64 return 0; 65 } 66 67 if (t->bustype != HP300_BUS_SPACE_DIO && 68 t->bustype != HP300_BUS_SPACE_SGC) 69 panic("%s: bad space tag", __func__); 70 71 /* 72 * Allocate virtual address space from the extio extent map. 73 */ 74 offset = m68k_page_offset(bpa); 75 size = m68k_round_page(offset + size); 76 error = extent_alloc(extio_ex, size, PAGE_SIZE, 0, 77 EX_FAST | EX_NOWAIT | (extio_ex_malloc_safe ? EX_MALLOCOK : 0), 78 &kva); 79 if (error) 80 return error; 81 82 /* 83 * Map the range. The range is always cache-inhibited on the hp300. 84 */ 85 physaccess((void *)kva, (void *)bpa, size, PG_RW|PG_CI); 86 87 /* 88 * All done. 89 */ 90 *bshp = (bus_space_handle_t)(kva + offset); 91 return 0; 92 } 93 94 int 95 bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart, bus_addr_t rend, 96 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 97 bus_addr_t *bpap, bus_space_handle_t *bshp) 98 { 99 100 /* 101 * Not meaningful on any currently-supported hp300 bus. 102 */ 103 return EINVAL; 104 } 105 106 void 107 bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) 108 { 109 110 /* 111 * Not meaningful on any currently-supported hp300 bus. 112 */ 113 panic("%s: shouldn't be here", __func__); 114 } 115 116 void 117 bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) 118 { 119 vaddr_t kva; 120 vsize_t offset; 121 122 if (t->bustype == HP300_BUS_SPACE_INTIO) { 123 /* 124 * Intio space is direct-mapped in pmap_bootstrap(); nothing 125 * to do 126 */ 127 return; 128 } 129 130 if (t->bustype != HP300_BUS_SPACE_DIO && 131 t->bustype != HP300_BUS_SPACE_SGC) 132 panic("%s: bad space tag", __func__); 133 134 kva = m68k_trunc_page(bsh); 135 offset = m68k_page_offset(bsh); 136 size = m68k_round_page(offset + size); 137 138 #ifdef DIAGNOSTIC 139 if (bsh < (vaddr_t)extiobase || 140 bsh >= ((vaddr_t)extiobase + ptoa(EIOMAPSIZE))) 141 panic("%s: bad bus space handle", __func__); 142 #endif 143 144 /* 145 * Unmap the range. 146 */ 147 physunaccess((void *)kva, size); 148 149 /* 150 * Free it from the extio extent map. 151 */ 152 if (extent_free(extio_ex, kva, size, 153 EX_NOWAIT | (extio_ex_malloc_safe ? EX_MALLOCOK : 0))) 154 printf("%s: kva 0x%lx size 0x%lx: " 155 "can't free region\n", __func__, (u_long)bsh, size); 156 } 157 158 int 159 bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 160 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 161 { 162 163 *nbshp = bsh + offset; 164 return 0; 165 } 166 167 int 168 hp300_bus_space_probe(bus_space_tag_t t, bus_space_handle_t bsh, 169 bus_size_t offset, int sz) 170 { 171 label_t faultbuf; 172 int i; 173 174 nofault = (int *)&faultbuf; 175 if (setjmp((label_t *)nofault)) { 176 nofault = NULL; 177 return 0; 178 } 179 180 switch (sz) { 181 case 1: 182 i = bus_space_read_1(t, bsh, offset); 183 break; 184 185 case 2: 186 i = bus_space_read_2(t, bsh, offset); 187 break; 188 189 case 4: 190 i = bus_space_read_4(t, bsh, offset); 191 break; 192 193 default: 194 panic("%s: unupported data size %d", __func__, sz); 195 /* NOTREACHED */ 196 } 197 __USE(i); 198 nofault = NULL; 199 return 1; 200 } 201
Indexes created Tue Sep 30 11:09:46 GMT 2025