rumpdev_bus_space.c revision 1.4
1 /* $NetBSD: rumpdev_bus_space.c,v 1.4 2015/05/17 13:45:37 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 Antti Kantee. 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 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/atomic.h> 30 31 #include <sys/param.h> 32 33 #include <dev/pci/pcivar.h> 34 35 #include "pci_user.h" 36 37 #if defined(RUMP_PCI_IOSPACE) && (defined(__i386__) || defined(__x86_64__)) 38 #define IOSPACE_SUPPORTED 39 #endif 40 41 int 42 bus_space_map(bus_space_tag_t bst, bus_addr_t address, bus_size_t size, 43 int flags, bus_space_handle_t *handlep) 44 { 45 int rv; 46 47 /* 48 * I/O space we just "let it bli" in case someone wants to 49 * map it (e.g. on Xen) 50 * 51 * Memory space needs to be mapped into our guest, so we 52 * make a hypercall to request it. 53 */ 54 if (bst == 0) { 55 #ifdef IOSPACE_SUPPORTED 56 *handlep = address; 57 rv = 0; 58 #else 59 rv = ENOTSUP; 60 #endif 61 } else { 62 *handlep = (bus_space_handle_t)rumpcomp_pci_map(address, size); 63 rv = *handlep ? 0 : EINVAL; 64 } 65 66 return rv; 67 } 68 69 uint8_t 70 bus_space_read_1(bus_space_tag_t bst, bus_space_handle_t bsh, 71 bus_size_t offset) 72 { 73 uint8_t rv; 74 75 if (bst == 0) { 76 #ifdef IOSPACE_SUPPORTED 77 unsigned short addr = bsh + offset; 78 __asm__ __volatile__("inb %1, %0" : "=a"(rv) : "d"(addr)); 79 #else 80 panic("IO space not supported"); 81 #endif 82 } else { 83 rv = *(volatile uint8_t *)(bsh + offset); 84 } 85 86 return rv; 87 } 88 89 uint16_t 90 bus_space_read_2(bus_space_tag_t bst, bus_space_handle_t bsh, 91 bus_size_t offset) 92 { 93 uint16_t rv; 94 95 if (bst == 0) { 96 #ifdef IOSPACE_SUPPORTED 97 unsigned short addr = bsh + offset; 98 __asm__ __volatile__("in %1, %0" : "=a"(rv) : "d"(addr)); 99 #else 100 panic("IO space not supported"); 101 #endif 102 } else { 103 rv = *(volatile uint16_t *)(bsh + offset); 104 } 105 106 return rv; 107 } 108 109 uint32_t 110 bus_space_read_4(bus_space_tag_t bst, bus_space_handle_t bsh, 111 bus_size_t offset) 112 { 113 uint32_t rv; 114 115 if (bst == 0) { 116 #ifdef IOSPACE_SUPPORTED 117 unsigned short addr = bsh + offset; 118 __asm__ __volatile__("inl %1, %0" : "=a"(rv) : "d"(addr)); 119 #else 120 panic("IO space not supported"); 121 #endif 122 } else { 123 rv = *(volatile uint32_t *)(bsh + offset); 124 } 125 126 return rv; 127 } 128 129 void 130 bus_space_read_multi_1(bus_space_tag_t bst, bus_space_handle_t bsh, 131 bus_size_t offset, uint8_t *datap, bus_size_t count) 132 { 133 134 while (count--) { 135 *datap++ = bus_space_read_1(bst, bsh, offset); 136 bus_space_barrier(bst, bst, offset, 1, BUS_SPACE_BARRIER_READ); 137 } 138 } 139 140 void 141 bus_space_read_multi_2(bus_space_tag_t bst, bus_space_handle_t bsh, 142 bus_size_t offset, uint16_t *datap, bus_size_t count) 143 { 144 145 while (count--) { 146 *datap++ = bus_space_read_2(bst, bsh, offset); 147 bus_space_barrier(bst, bst, offset, 2, BUS_SPACE_BARRIER_READ); 148 } 149 } 150 151 void 152 bus_space_read_multi_4(bus_space_tag_t bst, bus_space_handle_t bsh, 153 bus_size_t offset, uint32_t *datap, bus_size_t count) 154 { 155 156 while (count--) { 157 *datap++ = bus_space_read_4(bst, bsh, offset); 158 bus_space_barrier(bst, bst, offset, 4, BUS_SPACE_BARRIER_READ); 159 } 160 } 161 162 void 163 bus_space_write_1(bus_space_tag_t bst, bus_space_handle_t bsh, 164 bus_size_t offset, uint8_t v) 165 { 166 167 if (bst == 0) { 168 #ifdef IOSPACE_SUPPORTED 169 unsigned short addr = bsh + offset; 170 __asm__ __volatile__("outb %0, %1" :: "a"(v), "d"(addr)); 171 #else 172 panic("IO space not supported"); 173 #endif 174 } else { 175 *(volatile uint8_t *)(bsh + offset) = v; 176 } 177 } 178 179 void 180 bus_space_write_2(bus_space_tag_t bst, bus_space_handle_t bsh, 181 bus_size_t offset, uint16_t v) 182 { 183 184 if (bst == 0) { 185 #ifdef IOSPACE_SUPPORTED 186 unsigned short addr = bsh + offset; 187 __asm__ __volatile__("out %0, %1" :: "a"(v), "d"(addr)); 188 #else 189 panic("IO space not supported"); 190 #endif 191 } else { 192 *(volatile uint16_t *)(bsh + offset) = v; 193 } 194 } 195 196 void 197 bus_space_write_4(bus_space_tag_t bst, bus_space_handle_t bsh, 198 bus_size_t offset, uint32_t v) 199 { 200 201 if (bst == 0) { 202 #ifdef IOSPACE_SUPPORTED 203 unsigned short addr = bsh + offset; 204 __asm__ __volatile__("outl %0, %1" :: "a"(v), "d"(addr)); 205 #else 206 panic("IO space not supported"); 207 #endif 208 } else { 209 *(volatile uint32_t *)(bsh + offset) = v; 210 } 211 } 212 213 void 214 bus_space_write_multi_1(bus_space_tag_t bst, bus_space_handle_t bsh, 215 bus_size_t offset, const uint8_t *datap, bus_size_t count) 216 { 217 218 while (count--) { 219 const uint8_t value = *datap++; 220 221 bus_space_write_1(bst, bsh, offset, value); 222 bus_space_barrier(bst, bst, offset, 1, BUS_SPACE_BARRIER_WRITE); 223 } 224 } 225 226 void 227 bus_space_write_multi_2(bus_space_tag_t bst, bus_space_handle_t bsh, 228 bus_size_t offset, const uint16_t *datap, bus_size_t count) 229 { 230 231 while (count--) { 232 const uint16_t value = *datap++; 233 234 bus_space_write_2(bst, bsh, offset, value); 235 bus_space_barrier(bst, bst, offset, 2, BUS_SPACE_BARRIER_WRITE); 236 } 237 } 238 239 void 240 bus_space_write_multi_4(bus_space_tag_t bst, bus_space_handle_t bsh, 241 bus_size_t offset, const uint32_t *datap, bus_size_t count) 242 { 243 244 while (count--) { 245 const uint32_t value = *datap++; 246 247 bus_space_write_4(bst, bsh, offset, value); 248 bus_space_barrier(bst, bst, offset, 4, BUS_SPACE_BARRIER_WRITE); 249 } 250 } 251 252 paddr_t 253 bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t off, 254 int prot, int flags) 255 { 256 257 panic("%s: unimplemented", __func__); 258 } 259 260 int 261 bus_space_subregion(bus_space_tag_t bst, bus_space_handle_t bsh, 262 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep) 263 { 264 265 *nhandlep = bsh + offset; 266 return 0; 267 } 268 269 void 270 bus_space_unmap(bus_space_tag_t bst, bus_space_handle_t bsh, 271 bus_size_t size) 272 { 273 274 panic("%s: unimplemented", __func__); 275 } 276 277 void 278 bus_space_barrier(bus_space_tag_t bst, bus_space_handle_t bsh, 279 bus_size_t offset, bus_size_t len, int flags) 280 { 281 282 /* weelll ... */ 283 membar_sync(); 284 } 285
Indexes created Mon Sep 22 05:09:51 GMT 2025