| 1 | /* |
| 2 | * ACPI implementation |
| 3 | * |
| 4 | * Copyright (c) 2006 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License version 2.1 as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, see <http://www.gnu.org/licenses/> |
| 17 | * |
| 18 | * Contributions after 2012-01-13 are licensed under the terms of the |
| 19 | * GNU GPL, version 2 or (at your option) any later version. |
| 20 | */ |
| 21 | |
| 22 | #include "qemu/osdep.h" |
| 23 | #include "hw/core/irq.h" |
| 24 | #include "hw/acpi/acpi.h" |
| 25 | #include "hw/acpi/acpi_dev_interface.h" |
| 26 | #include "hw/nvram/fw_cfg.h" |
| 27 | #include "qemu/config-file.h" |
| 28 | #include "qapi/error.h" |
| 29 | #include "qapi/opts-visitor.h" |
| 30 | #include "qapi/qapi-events-run-state.h" |
| 31 | #include "qapi/qapi-visit-acpi.h" |
| 32 | #include "qemu/error-report.h" |
| 33 | #include "qemu/module.h" |
| 34 | #include "qemu/option.h" |
| 35 | #include "system/runstate.h" |
| 36 | #include "trace.h" |
| 37 | |
| 38 | struct acpi_table_header { |
| 39 | uint16_t _length; /* our length, not actual part of the hdr */ |
| 40 | /* allows easier parsing for fw_cfg clients */ |
| 41 | char sig[4] |
| 42 | QEMU_NONSTRING; /* ACPI signature (4 ASCII characters) */ |
| 43 | uint32_t length; /* Length of table, in bytes, including header */ |
| 44 | uint8_t revision; /* ACPI Specification minor version # */ |
| 45 | uint8_t checksum; /* To make sum of entire table == 0 */ |
| 46 | char oem_id[6] |
| 47 | QEMU_NONSTRING; /* OEM identification */ |
| 48 | char oem_table_id[8] |
| 49 | QEMU_NONSTRING; /* OEM table identification */ |
| 50 | uint32_t oem_revision; /* OEM revision number */ |
| 51 | char asl_compiler_id[4] |
| 52 | QEMU_NONSTRING; /* ASL compiler vendor ID */ |
| 53 | uint32_t asl_compiler_revision; /* ASL compiler revision number */ |
| 54 | } QEMU_PACKED; |
| 55 | |
| 56 | #define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header) |
| 57 | #define ACPI_TABLE_PFX_SIZE sizeof(uint16_t) /* size of the extra prefix */ |
| 58 | |
| 59 | static const char unsigned dfl_hdr[ACPI_TABLE_HDR_SIZE - ACPI_TABLE_PFX_SIZE] = |
| 60 | "QEMU\0\0\0\0\1\0" /* sig (4), len(4), revno (1), csum (1) */ |
| 61 | "QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */ |
| 62 | "QEMU\1\0\0\0" /* ASL compiler ID (4), version (4) */ |
| 63 | ; |
| 64 | |
| 65 | char unsigned *acpi_tables; |
| 66 | size_t acpi_tables_len; |
| 67 | |
| 68 | static QemuOptsList qemu_acpi_opts = { |
| 69 | .name = "acpi", |
| 70 | .implied_opt_name = "data", |
| 71 | .head = QTAILQ_HEAD_INITIALIZER(qemu_acpi_opts.head), |
| 72 | .desc = { { 0 } } /* validated with OptsVisitor */ |
| 73 | }; |
| 74 | |
| 75 | static void acpi_register_config(void) |
| 76 | { |
| 77 | qemu_add_opts(&qemu_acpi_opts); |
| 78 | } |
| 79 | |
| 80 | opts_init(acpi_register_config); |
| 81 | |
| 82 | bool acpi_builtin(void) |
| 83 | { |
| 84 | return true; |
| 85 | } |
| 86 | |
| 87 | /* Calculate the ACPI checksum value so that if used in the corresponding |
| 88 | * header field, the ACPI checksum verification will be successful. |
| 89 | */ |
| 90 | int acpi_checksum(const uint8_t *data, int len) |
| 91 | { |
| 92 | int sum, i; |
| 93 | sum = 0; |
| 94 | for (i = 0; i < len; i++) { |
| 95 | sum += data[i]; |
| 96 | } |
| 97 | return (-sum) & 0xff; |
| 98 | } |
| 99 | |
| 100 | |
| 101 | /* Install a copy of the ACPI table specified in @blob. |
| 102 | * |
| 103 | * If @has_header is set, @blob starts with the System Description Table Header |
| 104 | * structure. Otherwise, "dfl_hdr" is prepended. In any case, each header field |
| 105 | * is optionally overwritten from @hdrs. |
| 106 | * |
| 107 | * It is valid to call this function with |
| 108 | * (@blob == NULL && bloblen == 0 && !has_header). |
| 109 | * |
| 110 | * @hdrs->file and @hdrs->data are ignored. |
| 111 | * |
| 112 | * SIZE_MAX is considered "infinity" in this function. |
| 113 | * |
| 114 | * The number of tables that can be installed is not limited, but the 16-bit |
| 115 | * counter at the beginning of "acpi_tables" wraps around after UINT16_MAX. |
| 116 | */ |
| 117 | static void acpi_table_install(const char unsigned *blob, size_t bloblen, |
| 118 | bool has_header, |
| 119 | const struct AcpiTableOptions *hdrs, |
| 120 | Error **errp) |
| 121 | { |
| 122 | size_t body_start; |
| 123 | const char unsigned *hdr_src; |
| 124 | size_t body_size, acpi_payload_size; |
| 125 | struct acpi_table_header *ext_hdr; |
| 126 | unsigned changed_fields; |
| 127 | |
| 128 | /* Calculate where the ACPI table body starts within the blob, plus where |
| 129 | * to copy the ACPI table header from. |
| 130 | */ |
| 131 | if (has_header) { |
| 132 | /* _length | ACPI header in blob | blob body |
| 133 | * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^ |
| 134 | * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size |
| 135 | * == body_start |
| 136 | * |
| 137 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| 138 | * acpi_payload_size == bloblen |
| 139 | */ |
| 140 | body_start = sizeof dfl_hdr; |
| 141 | |
| 142 | if (bloblen < body_start) { |
| 143 | error_setg(errp, "ACPI table claiming to have header is too " |
| 144 | "short, available: %zu, expected: %zu", bloblen, |
| 145 | body_start); |
| 146 | return; |
| 147 | } |
| 148 | hdr_src = blob; |
| 149 | } else { |
| 150 | /* _length | ACPI header in template | blob body |
| 151 | * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^ |
| 152 | * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size |
| 153 | * == bloblen |
| 154 | * |
| 155 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| 156 | * acpi_payload_size |
| 157 | */ |
| 158 | body_start = 0; |
| 159 | hdr_src = dfl_hdr; |
| 160 | } |
| 161 | body_size = bloblen - body_start; |
| 162 | acpi_payload_size = sizeof dfl_hdr + body_size; |
| 163 | |
| 164 | if (acpi_payload_size > UINT16_MAX) { |
| 165 | error_setg(errp, "ACPI table too big, requested: %zu, max: %u", |
| 166 | acpi_payload_size, (unsigned)UINT16_MAX); |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | /* We won't fail from here on. Initialize / extend the globals. */ |
| 171 | if (acpi_tables == NULL) { |
| 172 | acpi_tables_len = sizeof(uint16_t); |
| 173 | acpi_tables = g_malloc0(acpi_tables_len); |
| 174 | } |
| 175 | |
| 176 | acpi_tables = g_realloc(acpi_tables, acpi_tables_len + |
| 177 | ACPI_TABLE_PFX_SIZE + |
| 178 | sizeof dfl_hdr + body_size); |
| 179 | |
| 180 | ext_hdr = (struct acpi_table_header *)(acpi_tables + acpi_tables_len); |
| 181 | acpi_tables_len += ACPI_TABLE_PFX_SIZE; |
| 182 | |
| 183 | memcpy(acpi_tables + acpi_tables_len, hdr_src, sizeof dfl_hdr); |
| 184 | acpi_tables_len += sizeof dfl_hdr; |
| 185 | |
| 186 | if (blob != NULL) { |
| 187 | memcpy(acpi_tables + acpi_tables_len, blob + body_start, body_size); |
| 188 | acpi_tables_len += body_size; |
| 189 | } |
| 190 | |
| 191 | /* increase number of tables */ |
| 192 | stw_le_p(acpi_tables, lduw_le_p(acpi_tables) + 1u); |
| 193 | |
| 194 | /* Update the header fields. The strings need not be NUL-terminated. */ |
| 195 | changed_fields = 0; |
| 196 | ext_hdr->_length = cpu_to_le16(acpi_payload_size); |
| 197 | |
| 198 | if (hdrs->sig) { |
| 199 | strncpy(ext_hdr->sig, hdrs->sig, sizeof ext_hdr->sig); |
| 200 | ++changed_fields; |
| 201 | } |
| 202 | |
| 203 | if (has_header && le32_to_cpu(ext_hdr->length) != acpi_payload_size) { |
| 204 | warn_report("ACPI table has wrong length, header says " |
| 205 | "%" PRIu32 ", actual size %zu bytes", |
| 206 | le32_to_cpu(ext_hdr->length), acpi_payload_size); |
| 207 | } |
| 208 | ext_hdr->length = cpu_to_le32(acpi_payload_size); |
| 209 | |
| 210 | if (hdrs->has_rev) { |
| 211 | ext_hdr->revision = hdrs->rev; |
| 212 | ++changed_fields; |
| 213 | } |
| 214 | |
| 215 | ext_hdr->checksum = 0; |
| 216 | |
| 217 | if (hdrs->oem_id) { |
| 218 | strncpy(ext_hdr->oem_id, hdrs->oem_id, sizeof ext_hdr->oem_id); |
| 219 | ++changed_fields; |
| 220 | } |
| 221 | if (hdrs->oem_table_id) { |
| 222 | strncpy(ext_hdr->oem_table_id, hdrs->oem_table_id, |
| 223 | sizeof ext_hdr->oem_table_id); |
| 224 | ++changed_fields; |
| 225 | } |
| 226 | if (hdrs->has_oem_rev) { |
| 227 | ext_hdr->oem_revision = cpu_to_le32(hdrs->oem_rev); |
| 228 | ++changed_fields; |
| 229 | } |
| 230 | if (hdrs->asl_compiler_id) { |
| 231 | strncpy(ext_hdr->asl_compiler_id, hdrs->asl_compiler_id, |
| 232 | sizeof ext_hdr->asl_compiler_id); |
| 233 | ++changed_fields; |
| 234 | } |
| 235 | if (hdrs->has_asl_compiler_rev) { |
| 236 | ext_hdr->asl_compiler_revision = cpu_to_le32(hdrs->asl_compiler_rev); |
| 237 | ++changed_fields; |
| 238 | } |
| 239 | |
| 240 | if (!has_header && changed_fields == 0) { |
| 241 | warn_report("ACPI table: no headers are specified"); |
| 242 | } |
| 243 | |
| 244 | /* recalculate checksum */ |
| 245 | ext_hdr->checksum = acpi_checksum((const char unsigned *)ext_hdr + |
| 246 | ACPI_TABLE_PFX_SIZE, acpi_payload_size); |
| 247 | } |
| 248 | |
| 249 | void acpi_table_add(const QemuOpts *opts, Error **errp) |
| 250 | { |
| 251 | AcpiTableOptions *hdrs = NULL; |
| 252 | char **pathnames = NULL; |
| 253 | char **cur; |
| 254 | size_t bloblen = 0; |
| 255 | char unsigned *blob = NULL; |
| 256 | |
| 257 | { |
| 258 | Visitor *v; |
| 259 | |
| 260 | v = opts_visitor_new(opts); |
| 261 | visit_type_AcpiTableOptions(v, NULL, &hdrs, errp); |
| 262 | visit_free(v); |
| 263 | } |
| 264 | |
| 265 | if (!hdrs) { |
| 266 | goto out; |
| 267 | } |
| 268 | if (!hdrs->file == !hdrs->data) { |
| 269 | error_setg(errp, "'-acpitable' requires one of 'data' or 'file'"); |
| 270 | goto out; |
| 271 | } |
| 272 | |
| 273 | pathnames = g_strsplit(hdrs->file ?: hdrs->data, ":", 0); |
| 274 | if (pathnames == NULL || pathnames[0] == NULL) { |
| 275 | error_setg(errp, "'-acpitable' requires at least one pathname"); |
| 276 | goto out; |
| 277 | } |
| 278 | |
| 279 | /* now read in the data files, reallocating buffer as needed */ |
| 280 | for (cur = pathnames; *cur; ++cur) { |
| 281 | int fd = open(*cur, O_RDONLY | O_BINARY); |
| 282 | |
| 283 | if (fd < 0) { |
| 284 | error_setg_file_open(errp, errno, *cur); |
| 285 | goto out; |
| 286 | } |
| 287 | |
| 288 | for (;;) { |
| 289 | char unsigned data[8192]; |
| 290 | ssize_t r; |
| 291 | |
| 292 | r = read(fd, data, sizeof data); |
| 293 | if (r == 0) { |
| 294 | break; |
| 295 | } else if (r > 0) { |
| 296 | blob = g_realloc(blob, bloblen + r); |
| 297 | memcpy(blob + bloblen, data, r); |
| 298 | bloblen += r; |
| 299 | } else if (errno != EINTR) { |
| 300 | error_setg_errno(errp, errno, "can't read file %s", *cur); |
| 301 | close(fd); |
| 302 | goto out; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | close(fd); |
| 307 | } |
| 308 | |
| 309 | acpi_table_install(blob, bloblen, !!hdrs->file, hdrs, errp); |
| 310 | |
| 311 | out: |
| 312 | g_free(blob); |
| 313 | g_strfreev(pathnames); |
| 314 | qapi_free_AcpiTableOptions(hdrs); |
| 315 | } |
| 316 | |
| 317 | unsigned acpi_table_len(void *current) |
| 318 | { |
| 319 | struct acpi_table_header *hdr = current - sizeof(hdr->_length); |
| 320 | return hdr->_length; |
| 321 | } |
| 322 | |
| 323 | static |
| 324 | void *acpi_table_hdr(void *h) |
| 325 | { |
| 326 | struct acpi_table_header *hdr = h; |
| 327 | return &hdr->sig; |
| 328 | } |
| 329 | |
| 330 | uint8_t *acpi_table_first(void) |
| 331 | { |
| 332 | if (!acpi_tables) { |
| 333 | return NULL; |
| 334 | } |
| 335 | return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE); |
| 336 | } |
| 337 | |
| 338 | uint8_t *acpi_table_next(uint8_t *current) |
| 339 | { |
| 340 | uint8_t *next = current + acpi_table_len(current); |
| 341 | |
| 342 | if (next - acpi_tables >= acpi_tables_len) { |
| 343 | return NULL; |
| 344 | } else { |
| 345 | return acpi_table_hdr(next); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | int acpi_get_slic_oem(AcpiSlicOem *oem) |
| 350 | { |
| 351 | uint8_t *u; |
| 352 | |
| 353 | for (u = acpi_table_first(); u; u = acpi_table_next(u)) { |
| 354 | struct acpi_table_header *hdr = (void *)(u - sizeof(hdr->_length)); |
| 355 | |
| 356 | if (memcmp(hdr->sig, "SLIC", 4) == 0) { |
| 357 | oem->id = g_strndup(hdr->oem_id, 6); |
| 358 | oem->table_id = g_strndup(hdr->oem_table_id, 8); |
| 359 | return 0; |
| 360 | } |
| 361 | } |
| 362 | return -1; |
| 363 | } |
| 364 | |
| 365 | static void acpi_notify_wakeup(Notifier *notifier, void *data) |
| 366 | { |
| 367 | ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup); |
| 368 | WakeupReason *reason = data; |
| 369 | |
| 370 | switch (*reason) { |
| 371 | case QEMU_WAKEUP_REASON_RTC: |
| 372 | ar->pm1.evt.sts |= |
| 373 | (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS); |
| 374 | break; |
| 375 | case QEMU_WAKEUP_REASON_PMTIMER: |
| 376 | ar->pm1.evt.sts |= |
| 377 | (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS); |
| 378 | break; |
| 379 | case QEMU_WAKEUP_REASON_OTHER: |
| 380 | /* ACPI_BITMASK_WAKE_STATUS should be set on resume. |
| 381 | Pretend that resume was caused by power button */ |
| 382 | ar->pm1.evt.sts |= |
| 383 | (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS); |
| 384 | break; |
| 385 | default: |
| 386 | break; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | /* ACPI PM1a EVT */ |
| 391 | uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar) |
| 392 | { |
| 393 | /* Compare ns-clock, not PM timer ticks, because |
| 394 | acpi_pm_tmr_update function uses ns for setting the timer. */ |
| 395 | int64_t d = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| 396 | if (d >= muldiv64(ar->tmr.overflow_time, |
| 397 | NANOSECONDS_PER_SECOND, PM_TIMER_FREQUENCY)) { |
| 398 | ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS; |
| 399 | } |
| 400 | return ar->pm1.evt.sts; |
| 401 | } |
| 402 | |
| 403 | static void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val) |
| 404 | { |
| 405 | uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar); |
| 406 | if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) { |
| 407 | /* if TMRSTS is reset, then compute the new overflow time */ |
| 408 | acpi_pm_tmr_calc_overflow_time(ar); |
| 409 | } |
| 410 | ar->pm1.evt.sts &= ~val; |
| 411 | } |
| 412 | |
| 413 | static void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val) |
| 414 | { |
| 415 | ar->pm1.evt.en = val; |
| 416 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, |
| 417 | val & ACPI_BITMASK_RT_CLOCK_ENABLE); |
| 418 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, |
| 419 | val & ACPI_BITMASK_TIMER_ENABLE); |
| 420 | } |
| 421 | |
| 422 | void acpi_pm1_evt_power_down(ACPIREGS *ar) |
| 423 | { |
| 424 | if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) { |
| 425 | ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS; |
| 426 | ar->tmr.update_sci(ar); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | void acpi_pm1_evt_reset(ACPIREGS *ar) |
| 431 | { |
| 432 | ar->pm1.evt.sts = 0; |
| 433 | ar->pm1.evt.en = 0; |
| 434 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0); |
| 435 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0); |
| 436 | } |
| 437 | |
| 438 | static uint64_t acpi_pm_evt_read(void *opaque, hwaddr addr, unsigned width) |
| 439 | { |
| 440 | ACPIREGS *ar = opaque; |
| 441 | switch (addr) { |
| 442 | case 0: |
| 443 | return acpi_pm1_evt_get_sts(ar); |
| 444 | case 2: |
| 445 | return ar->pm1.evt.en; |
| 446 | default: |
| 447 | return 0; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | static void acpi_pm_evt_write(void *opaque, hwaddr addr, uint64_t val, |
| 452 | unsigned width) |
| 453 | { |
| 454 | ACPIREGS *ar = opaque; |
| 455 | switch (addr) { |
| 456 | case 0: |
| 457 | acpi_pm1_evt_write_sts(ar, val); |
| 458 | ar->pm1.evt.update_sci(ar); |
| 459 | break; |
| 460 | case 2: |
| 461 | acpi_pm1_evt_write_en(ar, val); |
| 462 | ar->pm1.evt.update_sci(ar); |
| 463 | break; |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | static const MemoryRegionOps acpi_pm_evt_ops = { |
| 468 | .read = acpi_pm_evt_read, |
| 469 | .write = acpi_pm_evt_write, |
| 470 | .impl.min_access_size = 2, |
| 471 | .valid.min_access_size = 1, |
| 472 | .valid.max_access_size = 2, |
| 473 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 474 | }; |
| 475 | |
| 476 | void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn update_sci, |
| 477 | MemoryRegion *parent) |
| 478 | { |
| 479 | ar->pm1.evt.update_sci = update_sci; |
| 480 | memory_region_init_io(&ar->pm1.evt.io, memory_region_owner(parent), |
| 481 | &acpi_pm_evt_ops, ar, "acpi-evt", 4); |
| 482 | memory_region_add_subregion(parent, 0, &ar->pm1.evt.io); |
| 483 | } |
| 484 | |
| 485 | /* ACPI PM_TMR */ |
| 486 | void acpi_pm_tmr_update(ACPIREGS *ar, bool enable) |
| 487 | { |
| 488 | int64_t expire_time; |
| 489 | |
| 490 | /* schedule a timer interruption if needed */ |
| 491 | if (enable) { |
| 492 | expire_time = muldiv64(ar->tmr.overflow_time, NANOSECONDS_PER_SECOND, |
| 493 | PM_TIMER_FREQUENCY); |
| 494 | timer_mod(ar->tmr.timer, expire_time); |
| 495 | } else { |
| 496 | timer_del(ar->tmr.timer); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | static inline int64_t acpi_pm_tmr_get_clock(void) |
| 501 | { |
| 502 | return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), PM_TIMER_FREQUENCY, |
| 503 | NANOSECONDS_PER_SECOND); |
| 504 | } |
| 505 | |
| 506 | void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar) |
| 507 | { |
| 508 | int64_t d = acpi_pm_tmr_get_clock(); |
| 509 | ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL; |
| 510 | } |
| 511 | |
| 512 | static uint32_t acpi_pm_tmr_get(ACPIREGS *ar) |
| 513 | { |
| 514 | uint32_t d = acpi_pm_tmr_get_clock(); |
| 515 | return d & 0xffffff; |
| 516 | } |
| 517 | |
| 518 | static void acpi_pm_tmr_timer(void *opaque) |
| 519 | { |
| 520 | ACPIREGS *ar = opaque; |
| 521 | |
| 522 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER, NULL); |
| 523 | ar->tmr.update_sci(ar); |
| 524 | } |
| 525 | |
| 526 | static uint64_t acpi_pm_tmr_read(void *opaque, hwaddr addr, unsigned width) |
| 527 | { |
| 528 | return acpi_pm_tmr_get(opaque); |
| 529 | } |
| 530 | |
| 531 | static void acpi_pm_tmr_write(void *opaque, hwaddr addr, uint64_t val, |
| 532 | unsigned width) |
| 533 | { |
| 534 | /* nothing */ |
| 535 | } |
| 536 | |
| 537 | static const MemoryRegionOps acpi_pm_tmr_ops = { |
| 538 | .read = acpi_pm_tmr_read, |
| 539 | .write = acpi_pm_tmr_write, |
| 540 | .impl.min_access_size = 4, |
| 541 | .valid.min_access_size = 1, |
| 542 | .valid.max_access_size = 4, |
| 543 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 544 | }; |
| 545 | |
| 546 | void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci, |
| 547 | MemoryRegion *parent) |
| 548 | { |
| 549 | ar->tmr.update_sci = update_sci; |
| 550 | ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar); |
| 551 | memory_region_init_io(&ar->tmr.io, memory_region_owner(parent), |
| 552 | &acpi_pm_tmr_ops, ar, "acpi-tmr", 4); |
| 553 | memory_region_enable_lockless_io(&ar->tmr.io); |
| 554 | memory_region_add_subregion(parent, 8, &ar->tmr.io); |
| 555 | } |
| 556 | |
| 557 | void acpi_pm_tmr_reset(ACPIREGS *ar) |
| 558 | { |
| 559 | ar->tmr.overflow_time = 0; |
| 560 | timer_del(ar->tmr.timer); |
| 561 | } |
| 562 | |
| 563 | /* ACPI PM1aCNT */ |
| 564 | void acpi_pm1_cnt_update(ACPIREGS *ar, |
| 565 | bool sci_enable, bool sci_disable) |
| 566 | { |
| 567 | /* ACPI specs 3.0, 4.7.2.5 */ |
| 568 | if (ar->pm1.cnt.acpi_only) { |
| 569 | return; |
| 570 | } |
| 571 | |
| 572 | if (sci_enable) { |
| 573 | ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE; |
| 574 | } else if (sci_disable) { |
| 575 | ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | static uint64_t acpi_pm_cnt_read(void *opaque, hwaddr addr, unsigned width) |
| 580 | { |
| 581 | ACPIREGS *ar = opaque; |
| 582 | return ar->pm1.cnt.cnt >> addr * 8; |
| 583 | } |
| 584 | |
| 585 | static void acpi_pm_cnt_write(void *opaque, hwaddr addr, uint64_t val, |
| 586 | unsigned width) |
| 587 | { |
| 588 | ACPIREGS *ar = opaque; |
| 589 | |
| 590 | if (addr == 1) { |
| 591 | val = val << 8 | (ar->pm1.cnt.cnt & 0xff); |
| 592 | } |
| 593 | ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE); |
| 594 | |
| 595 | if (val & ACPI_BITMASK_SLEEP_ENABLE) { |
| 596 | /* change suspend type */ |
| 597 | uint16_t sus_typ = (val >> 10) & 7; |
| 598 | switch (sus_typ) { |
| 599 | case 0: /* soft power off */ |
| 600 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
| 601 | break; |
| 602 | case 1: |
| 603 | qemu_system_suspend_request(); |
| 604 | break; |
| 605 | default: |
| 606 | if (sus_typ == ar->pm1.cnt.s4_val) { /* S4 request */ |
| 607 | qapi_event_send_suspend_disk(); |
| 608 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
| 609 | } |
| 610 | break; |
| 611 | } |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | static const MemoryRegionOps acpi_pm_cnt_ops = { |
| 616 | .read = acpi_pm_cnt_read, |
| 617 | .write = acpi_pm_cnt_write, |
| 618 | .impl.min_access_size = 2, |
| 619 | .valid.min_access_size = 1, |
| 620 | .valid.max_access_size = 2, |
| 621 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 622 | }; |
| 623 | |
| 624 | void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent, |
| 625 | bool disable_s3, bool disable_s4, uint8_t s4_val, |
| 626 | bool acpi_only) |
| 627 | { |
| 628 | FWCfgState *fw_cfg; |
| 629 | |
| 630 | ar->pm1.cnt.s4_val = s4_val; |
| 631 | ar->pm1.cnt.acpi_only = acpi_only; |
| 632 | ar->wakeup.notify = acpi_notify_wakeup; |
| 633 | qemu_register_wakeup_notifier(&ar->wakeup); |
| 634 | |
| 635 | /* |
| 636 | * Register wake-up support in QMP query-current-machine API |
| 637 | */ |
| 638 | qemu_register_wakeup_support(); |
| 639 | |
| 640 | memory_region_init_io(&ar->pm1.cnt.io, memory_region_owner(parent), |
| 641 | &acpi_pm_cnt_ops, ar, "acpi-cnt", 2); |
| 642 | memory_region_add_subregion(parent, 4, &ar->pm1.cnt.io); |
| 643 | |
| 644 | fw_cfg = fw_cfg_find(); |
| 645 | if (fw_cfg) { |
| 646 | uint8_t suspend[6] = {128, 0, 0, 129, 128, 128}; |
| 647 | suspend[3] = 1 | ((!disable_s3) << 7); |
| 648 | suspend[4] = s4_val | ((!disable_s4) << 7); |
| 649 | |
| 650 | fw_cfg_add_file(fw_cfg, "etc/system-states", g_memdup(suspend, 6), 6); |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | void acpi_pm1_cnt_reset(ACPIREGS *ar) |
| 655 | { |
| 656 | ar->pm1.cnt.cnt = 0; |
| 657 | if (ar->pm1.cnt.acpi_only) { |
| 658 | ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | /* ACPI GPE */ |
| 663 | void acpi_gpe_init(ACPIREGS *ar, uint8_t len) |
| 664 | { |
| 665 | ar->gpe.len = len; |
| 666 | /* Only first len / 2 bytes are ever used, |
| 667 | * but the caller in ich9.c migrates full len bytes. |
| 668 | * TODO: fix ich9.c and drop the extra allocation. |
| 669 | */ |
| 670 | ar->gpe.sts = g_malloc0(len); |
| 671 | ar->gpe.en = g_malloc0(len); |
| 672 | } |
| 673 | |
| 674 | void acpi_gpe_reset(ACPIREGS *ar) |
| 675 | { |
| 676 | memset(ar->gpe.sts, 0, ar->gpe.len / 2); |
| 677 | memset(ar->gpe.en, 0, ar->gpe.len / 2); |
| 678 | } |
| 679 | |
| 680 | static uint8_t *acpi_gpe_ioport_get_ptr(ACPIREGS *ar, uint32_t addr) |
| 681 | { |
| 682 | uint8_t *cur = NULL; |
| 683 | |
| 684 | if (addr < ar->gpe.len / 2) { |
| 685 | cur = ar->gpe.sts + addr; |
| 686 | } else if (addr < ar->gpe.len) { |
| 687 | cur = ar->gpe.en + addr - ar->gpe.len / 2; |
| 688 | } else { |
| 689 | abort(); |
| 690 | } |
| 691 | |
| 692 | return cur; |
| 693 | } |
| 694 | |
| 695 | void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val) |
| 696 | { |
| 697 | uint8_t *cur; |
| 698 | |
| 699 | cur = acpi_gpe_ioport_get_ptr(ar, addr); |
| 700 | if (addr < ar->gpe.len / 2) { |
| 701 | trace_acpi_gpe_sts_ioport_writeb(addr, val); |
| 702 | /* GPE_STS */ |
| 703 | *cur = (*cur) & ~val; |
| 704 | } else if (addr < ar->gpe.len) { |
| 705 | trace_acpi_gpe_en_ioport_writeb(addr - (ar->gpe.len / 2), val); |
| 706 | /* GPE_EN */ |
| 707 | *cur = val; |
| 708 | } else { |
| 709 | abort(); |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr) |
| 714 | { |
| 715 | uint8_t *cur; |
| 716 | uint32_t val; |
| 717 | |
| 718 | cur = acpi_gpe_ioport_get_ptr(ar, addr); |
| 719 | val = 0; |
| 720 | if (cur != NULL) { |
| 721 | val = *cur; |
| 722 | } |
| 723 | |
| 724 | if (addr < ar->gpe.len / 2) { |
| 725 | trace_acpi_gpe_sts_ioport_readb(addr, val); |
| 726 | } else { |
| 727 | trace_acpi_gpe_en_ioport_readb(addr - (ar->gpe.len / 2), val); |
| 728 | } |
| 729 | |
| 730 | return val; |
| 731 | } |
| 732 | |
| 733 | void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq, |
| 734 | AcpiEventStatusBits status) |
| 735 | { |
| 736 | ar->gpe.sts[0] |= status; |
| 737 | acpi_update_sci(ar, irq); |
| 738 | } |
| 739 | |
| 740 | void acpi_update_sci(ACPIREGS *regs, qemu_irq irq) |
| 741 | { |
| 742 | int sci_level, pm1a_sts; |
| 743 | |
| 744 | pm1a_sts = acpi_pm1_evt_get_sts(regs); |
| 745 | |
| 746 | sci_level = ((pm1a_sts & |
| 747 | regs->pm1.evt.en & ACPI_BITMASK_PM1_COMMON_ENABLED) != 0) || |
| 748 | ((regs->gpe.sts[0] & regs->gpe.en[0]) != 0); |
| 749 | |
| 750 | qemu_set_irq(irq, sci_level); |
| 751 | |
| 752 | /* schedule a timer interruption if needed */ |
| 753 | acpi_pm_tmr_update(regs, |
| 754 | (regs->pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) && |
| 755 | !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS)); |
| 756 | } |
| 757 | |
| 758 | void acpi_send_event(DeviceState *dev, AcpiEventStatusBits event) |
| 759 | { |
| 760 | AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(dev); |
| 761 | if (adevc->send_event) { |
| 762 | AcpiDeviceIf *adev = ACPI_DEVICE_IF(dev); |
| 763 | adevc->send_event(adev, event); |
| 764 | } |
| 765 | } |