| 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | /* |
| 25 | * split out ioport related stuffs from vl.c. |
| 26 | */ |
| 27 | |
| 28 | #include "qemu/osdep.h" |
| 29 | #include "system/ioport.h" |
| 30 | #include "system/memory.h" |
| 31 | #include "system/address-spaces.h" |
| 32 | #include "hw/core/qdev.h" |
| 33 | #include "trace.h" |
| 34 | |
| 35 | struct MemoryRegionPortioList { |
| 36 | Object obj; |
| 37 | |
| 38 | MemoryRegion mr; |
| 39 | void *portio_opaque; |
| 40 | MemoryRegionPortio *ports; |
| 41 | }; |
| 42 | |
| 43 | #define TYPE_MEMORY_REGION_PORTIO_LIST "memory-region-portio-list" |
| 44 | OBJECT_DECLARE_SIMPLE_TYPE(MemoryRegionPortioList, MEMORY_REGION_PORTIO_LIST) |
| 45 | |
| 46 | static uint64_t unassigned_io_read(void *opaque, hwaddr addr, unsigned size) |
| 47 | { |
| 48 | return -1ULL; |
| 49 | } |
| 50 | |
| 51 | static void unassigned_io_write(void *opaque, hwaddr addr, uint64_t val, |
| 52 | unsigned size) |
| 53 | { |
| 54 | } |
| 55 | |
| 56 | const MemoryRegionOps unassigned_io_ops = { |
| 57 | .read = unassigned_io_read, |
| 58 | .write = unassigned_io_write, |
| 59 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 60 | }; |
| 61 | |
| 62 | void cpu_outb(uint32_t addr, uint8_t val) |
| 63 | { |
| 64 | trace_cpu_out(addr, 'b', val); |
| 65 | address_space_stb(&address_space_io, addr, val, |
| 66 | MEMTXATTRS_UNSPECIFIED, NULL); |
| 67 | } |
| 68 | |
| 69 | void cpu_outw(uint32_t addr, uint16_t val) |
| 70 | { |
| 71 | trace_cpu_out(addr, 'w', val); |
| 72 | address_space_stw_le(&address_space_io, addr, val, |
| 73 | MEMTXATTRS_UNSPECIFIED, NULL); |
| 74 | } |
| 75 | |
| 76 | void cpu_outl(uint32_t addr, uint32_t val) |
| 77 | { |
| 78 | trace_cpu_out(addr, 'l', val); |
| 79 | address_space_stl_le(&address_space_io, addr, val, |
| 80 | MEMTXATTRS_UNSPECIFIED, NULL); |
| 81 | } |
| 82 | |
| 83 | uint8_t cpu_inb(uint32_t addr) |
| 84 | { |
| 85 | uint8_t val; |
| 86 | |
| 87 | val = address_space_ldub(&address_space_io, addr, |
| 88 | MEMTXATTRS_UNSPECIFIED, NULL); |
| 89 | trace_cpu_in(addr, 'b', val); |
| 90 | return val; |
| 91 | } |
| 92 | |
| 93 | uint16_t cpu_inw(uint32_t addr) |
| 94 | { |
| 95 | uint16_t val; |
| 96 | |
| 97 | val = address_space_lduw_le(&address_space_io, addr, |
| 98 | MEMTXATTRS_UNSPECIFIED, NULL); |
| 99 | trace_cpu_in(addr, 'w', val); |
| 100 | return val; |
| 101 | } |
| 102 | |
| 103 | uint32_t cpu_inl(uint32_t addr) |
| 104 | { |
| 105 | uint32_t val; |
| 106 | |
| 107 | val = address_space_ldl_le(&address_space_io, addr, |
| 108 | MEMTXATTRS_UNSPECIFIED, NULL); |
| 109 | trace_cpu_in(addr, 'l', val); |
| 110 | return val; |
| 111 | } |
| 112 | |
| 113 | void portio_list_init(PortioList *piolist, |
| 114 | Object *owner, |
| 115 | const MemoryRegionPortio *callbacks, |
| 116 | void *opaque, const char *name) |
| 117 | { |
| 118 | unsigned n = 0; |
| 119 | |
| 120 | while (callbacks[n].size) { |
| 121 | ++n; |
| 122 | } |
| 123 | |
| 124 | piolist->ports = callbacks; |
| 125 | piolist->nr = 0; |
| 126 | piolist->regions = g_new0(MemoryRegion *, n); |
| 127 | piolist->address_space = NULL; |
| 128 | piolist->addr = 0; |
| 129 | piolist->opaque = opaque; |
| 130 | piolist->owner = owner; |
| 131 | piolist->name = name; |
| 132 | piolist->flush_coalesced_mmio = false; |
| 133 | } |
| 134 | |
| 135 | void portio_list_set_flush_coalesced(PortioList *piolist) |
| 136 | { |
| 137 | piolist->flush_coalesced_mmio = true; |
| 138 | } |
| 139 | |
| 140 | void portio_list_destroy(PortioList *piolist) |
| 141 | { |
| 142 | MemoryRegionPortioList *mrpio; |
| 143 | unsigned i; |
| 144 | |
| 145 | for (i = 0; i < piolist->nr; ++i) { |
| 146 | mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); |
| 147 | object_unparent(OBJECT(&mrpio->mr)); |
| 148 | object_unref(mrpio); |
| 149 | } |
| 150 | g_free(piolist->regions); |
| 151 | } |
| 152 | |
| 153 | static const MemoryRegionPortio *find_portio(MemoryRegionPortioList *mrpio, |
| 154 | uint64_t offset, unsigned size, |
| 155 | bool write) |
| 156 | { |
| 157 | const MemoryRegionPortio *mrp; |
| 158 | |
| 159 | for (mrp = mrpio->ports; mrp->size; ++mrp) { |
| 160 | if (offset >= mrp->offset && offset < mrp->offset + mrp->len && |
| 161 | size == mrp->size && |
| 162 | (write ? (bool)mrp->write : (bool)mrp->read)) { |
| 163 | return mrp; |
| 164 | } |
| 165 | } |
| 166 | return NULL; |
| 167 | } |
| 168 | |
| 169 | static uint64_t portio_read(void *opaque, hwaddr addr, unsigned size) |
| 170 | { |
| 171 | MemoryRegionPortioList *mrpio = opaque; |
| 172 | const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, false); |
| 173 | uint64_t data; |
| 174 | |
| 175 | data = ((uint64_t)1 << (size * 8)) - 1; |
| 176 | if (mrp) { |
| 177 | data = mrp->read(mrpio->portio_opaque, mrpio->mr.addr + addr); |
| 178 | } else if (size == 2) { |
| 179 | mrp = find_portio(mrpio, addr, 1, false); |
| 180 | if (mrp) { |
| 181 | data = mrp->read(mrpio->portio_opaque, mrpio->mr.addr + addr); |
| 182 | if (addr + 1 < mrp->offset + mrp->len) { |
| 183 | data |= mrp->read(mrpio->portio_opaque, mrpio->mr.addr + addr + 1) << 8; |
| 184 | } else { |
| 185 | data |= 0xff00; |
| 186 | } |
| 187 | } |
| 188 | } |
| 189 | return data; |
| 190 | } |
| 191 | |
| 192 | static void portio_write(void *opaque, hwaddr addr, uint64_t data, |
| 193 | unsigned size) |
| 194 | { |
| 195 | MemoryRegionPortioList *mrpio = opaque; |
| 196 | const MemoryRegionPortio *mrp = find_portio(mrpio, addr, size, true); |
| 197 | |
| 198 | if (mrp) { |
| 199 | mrp->write(mrpio->portio_opaque, mrpio->mr.addr + addr, data); |
| 200 | } else if (size == 2) { |
| 201 | mrp = find_portio(mrpio, addr, 1, true); |
| 202 | if (mrp) { |
| 203 | mrp->write(mrpio->portio_opaque, mrpio->mr.addr + addr, data & 0xff); |
| 204 | if (addr + 1 < mrp->offset + mrp->len) { |
| 205 | mrp->write(mrpio->portio_opaque, mrpio->mr.addr + addr + 1, data >> 8); |
| 206 | } |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static const MemoryRegionOps portio_ops = { |
| 212 | .read = portio_read, |
| 213 | .write = portio_write, |
| 214 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 215 | .valid.unaligned = true, |
| 216 | .impl.unaligned = true, |
| 217 | }; |
| 218 | |
| 219 | static void portio_list_add_1(PortioList *piolist, |
| 220 | const MemoryRegionPortio *pio_init, |
| 221 | unsigned count, unsigned start, |
| 222 | unsigned off_low, unsigned off_high) |
| 223 | { |
| 224 | MemoryRegionPortioList *mrpio; |
| 225 | Object *owner; |
| 226 | char *name; |
| 227 | unsigned i; |
| 228 | |
| 229 | /* Copy the sub-list and null-terminate it. */ |
| 230 | mrpio = MEMORY_REGION_PORTIO_LIST( |
| 231 | object_new(TYPE_MEMORY_REGION_PORTIO_LIST)); |
| 232 | mrpio->portio_opaque = piolist->opaque; |
| 233 | mrpio->ports = g_new0(MemoryRegionPortio, count + 1); |
| 234 | memcpy(mrpio->ports, pio_init, sizeof(MemoryRegionPortio) * count); |
| 235 | |
| 236 | /* Adjust the offsets to all be zero-based for the region. */ |
| 237 | for (i = 0; i < count; ++i) { |
| 238 | mrpio->ports[i].offset -= off_low; |
| 239 | } |
| 240 | |
| 241 | /* |
| 242 | * The MemoryRegion owner is the MemoryRegionPortioList since that manages |
| 243 | * the lifecycle via the refcount |
| 244 | */ |
| 245 | memory_region_init_io(&mrpio->mr, OBJECT(mrpio), &portio_ops, mrpio, |
| 246 | piolist->name, off_high - off_low); |
| 247 | |
| 248 | /* Reparent the MemoryRegion to the piolist owner */ |
| 249 | object_ref(&mrpio->mr); |
| 250 | object_unparent(OBJECT(&mrpio->mr)); |
| 251 | if (!piolist->owner) { |
| 252 | owner = machine_get_container("unattached"); |
| 253 | } else { |
| 254 | owner = piolist->owner; |
| 255 | } |
| 256 | name = g_strdup_printf("%s[*]", piolist->name); |
| 257 | object_property_add_child(owner, name, OBJECT(&mrpio->mr)); |
| 258 | g_free(name); |
| 259 | |
| 260 | if (piolist->flush_coalesced_mmio) { |
| 261 | memory_region_set_flush_coalesced(&mrpio->mr); |
| 262 | } |
| 263 | memory_region_add_subregion(piolist->address_space, |
| 264 | start + off_low, &mrpio->mr); |
| 265 | piolist->regions[piolist->nr] = &mrpio->mr; |
| 266 | ++piolist->nr; |
| 267 | } |
| 268 | |
| 269 | void portio_list_add(PortioList *piolist, |
| 270 | MemoryRegion *address_space, |
| 271 | uint32_t start) |
| 272 | { |
| 273 | const MemoryRegionPortio *pio, *pio_start = piolist->ports; |
| 274 | unsigned int off_low, off_high, off_last, count; |
| 275 | |
| 276 | piolist->address_space = address_space; |
| 277 | piolist->addr = start; |
| 278 | |
| 279 | /* Handle the first entry specially. */ |
| 280 | off_last = off_low = pio_start->offset; |
| 281 | off_high = off_low + pio_start->len + pio_start->size - 1; |
| 282 | count = 1; |
| 283 | |
| 284 | for (pio = pio_start + 1; pio->size != 0; pio++, count++) { |
| 285 | /* All entries must be sorted by offset. */ |
| 286 | assert(pio->offset >= off_last); |
| 287 | off_last = pio->offset; |
| 288 | |
| 289 | /* If we see a hole, break the region. */ |
| 290 | if (off_last > off_high) { |
| 291 | portio_list_add_1(piolist, pio_start, count, start, off_low, |
| 292 | off_high); |
| 293 | /* ... and start collecting anew. */ |
| 294 | pio_start = pio; |
| 295 | off_low = off_last; |
| 296 | off_high = off_low + pio->len + pio_start->size - 1; |
| 297 | count = 0; |
| 298 | } else if (off_last + pio->len > off_high) { |
| 299 | off_high = off_last + pio->len + pio_start->size - 1; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | /* There will always be an open sub-list. */ |
| 304 | portio_list_add_1(piolist, pio_start, count, start, off_low, off_high); |
| 305 | } |
| 306 | |
| 307 | void portio_list_del(PortioList *piolist) |
| 308 | { |
| 309 | MemoryRegionPortioList *mrpio; |
| 310 | unsigned i; |
| 311 | |
| 312 | for (i = 0; i < piolist->nr; ++i) { |
| 313 | mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); |
| 314 | memory_region_del_subregion(piolist->address_space, &mrpio->mr); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | void portio_list_set_enabled(PortioList *piolist, bool enabled) |
| 319 | { |
| 320 | unsigned i; |
| 321 | |
| 322 | for (i = 0; i < piolist->nr; ++i) { |
| 323 | memory_region_set_enabled(piolist->regions[i], enabled); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | void portio_list_set_address(PortioList *piolist, uint32_t addr) |
| 328 | { |
| 329 | MemoryRegionPortioList *mrpio; |
| 330 | unsigned i, j; |
| 331 | |
| 332 | for (i = 0; i < piolist->nr; ++i) { |
| 333 | mrpio = container_of(piolist->regions[i], MemoryRegionPortioList, mr); |
| 334 | memory_region_set_address(&mrpio->mr, |
| 335 | mrpio->mr.addr - piolist->addr + addr); |
| 336 | for (j = 0; mrpio->ports[j].size; ++j) { |
| 337 | mrpio->ports[j].offset += addr - piolist->addr; |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | piolist->addr = addr; |
| 342 | } |
| 343 | |
| 344 | static void memory_region_portio_list_finalize(Object *obj) |
| 345 | { |
| 346 | MemoryRegionPortioList *mrpio = MEMORY_REGION_PORTIO_LIST(obj); |
| 347 | |
| 348 | /* |
| 349 | * This check makes sure any random object_new() (without doing the |
| 350 | * rest inits in portio_list_add_1()) will not crash when finalizing. |
| 351 | * One example is QMP command qom-list-properties. |
| 352 | */ |
| 353 | if (mrpio->ports) { |
| 354 | object_unref(&mrpio->mr); |
| 355 | g_free(mrpio->ports); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | static const TypeInfo memory_region_portio_list_info = { |
| 360 | .parent = TYPE_OBJECT, |
| 361 | .name = TYPE_MEMORY_REGION_PORTIO_LIST, |
| 362 | .instance_size = sizeof(MemoryRegionPortioList), |
| 363 | .instance_finalize = memory_region_portio_list_finalize, |
| 364 | }; |
| 365 | |
| 366 | static void ioport_register_types(void) |
| 367 | { |
| 368 | type_register_static(&memory_region_portio_list_info); |
| 369 | } |
| 370 | |
| 371 | type_init(ioport_register_types) |