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 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/irq.h" |
24 | #include "hw/acpi/acpi.h" |
25 | #include "hw/nvram/fw_cfg.h" |
26 | #include "qemu/config-file.h" |
27 | #include "qapi/error.h" |
28 | #include "qapi/opts-visitor.h" |
29 | #include "qapi/qapi-events-run-state.h" |
30 | #include "qapi/qapi-visit-misc.h" |
31 | #include "qemu/error-report.h" |
32 | #include "qemu/module.h" |
33 | #include "qemu/option.h" |
34 | #include "sysemu/runstate.h" |
35 | |
36 | struct { |
37 | uint16_t ; /* our length, not actual part of the hdr */ |
38 | /* allows easier parsing for fw_cfg clients */ |
39 | char [4] |
40 | QEMU_NONSTRING; /* ACPI signature (4 ASCII characters) */ |
41 | uint32_t ; /* Length of table, in bytes, including header */ |
42 | uint8_t ; /* ACPI Specification minor version # */ |
43 | uint8_t ; /* To make sum of entire table == 0 */ |
44 | char [6] |
45 | QEMU_NONSTRING; /* OEM identification */ |
46 | char [8] |
47 | QEMU_NONSTRING; /* OEM table identification */ |
48 | uint32_t ; /* OEM revision number */ |
49 | char [4] |
50 | QEMU_NONSTRING; /* ASL compiler vendor ID */ |
51 | uint32_t ; /* ASL compiler revision number */ |
52 | } QEMU_PACKED; |
53 | |
54 | #define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header) |
55 | #define ACPI_TABLE_PFX_SIZE sizeof(uint16_t) /* size of the extra prefix */ |
56 | |
57 | static const char unsigned dfl_hdr[ACPI_TABLE_HDR_SIZE - ACPI_TABLE_PFX_SIZE] = |
58 | "QEMU\0\0\0\0\1\0" /* sig (4), len(4), revno (1), csum (1) */ |
59 | "QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */ |
60 | "QEMU\1\0\0\0" /* ASL compiler ID (4), version (4) */ |
61 | ; |
62 | |
63 | char unsigned *acpi_tables; |
64 | size_t acpi_tables_len; |
65 | |
66 | static QemuOptsList qemu_acpi_opts = { |
67 | .name = "acpi" , |
68 | .implied_opt_name = "data" , |
69 | .head = QTAILQ_HEAD_INITIALIZER(qemu_acpi_opts.head), |
70 | .desc = { { 0 } } /* validated with OptsVisitor */ |
71 | }; |
72 | |
73 | static void acpi_register_config(void) |
74 | { |
75 | qemu_add_opts(&qemu_acpi_opts); |
76 | } |
77 | |
78 | opts_init(acpi_register_config); |
79 | |
80 | static int acpi_checksum(const uint8_t *data, int len) |
81 | { |
82 | int sum, i; |
83 | sum = 0; |
84 | for (i = 0; i < len; i++) { |
85 | sum += data[i]; |
86 | } |
87 | return (-sum) & 0xff; |
88 | } |
89 | |
90 | |
91 | /* Install a copy of the ACPI table specified in @blob. |
92 | * |
93 | * If @has_header is set, @blob starts with the System Description Table Header |
94 | * structure. Otherwise, "dfl_hdr" is prepended. In any case, each header field |
95 | * is optionally overwritten from @hdrs. |
96 | * |
97 | * It is valid to call this function with |
98 | * (@blob == NULL && bloblen == 0 && !has_header). |
99 | * |
100 | * @hdrs->file and @hdrs->data are ignored. |
101 | * |
102 | * SIZE_MAX is considered "infinity" in this function. |
103 | * |
104 | * The number of tables that can be installed is not limited, but the 16-bit |
105 | * counter at the beginning of "acpi_tables" wraps around after UINT16_MAX. |
106 | */ |
107 | static void acpi_table_install(const char unsigned *blob, size_t bloblen, |
108 | bool , |
109 | const struct AcpiTableOptions *hdrs, |
110 | Error **errp) |
111 | { |
112 | size_t body_start; |
113 | const char unsigned *hdr_src; |
114 | size_t body_size, acpi_payload_size; |
115 | struct acpi_table_header *ext_hdr; |
116 | unsigned changed_fields; |
117 | |
118 | /* Calculate where the ACPI table body starts within the blob, plus where |
119 | * to copy the ACPI table header from. |
120 | */ |
121 | if (has_header) { |
122 | /* _length | ACPI header in blob | blob body |
123 | * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^ |
124 | * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size |
125 | * == body_start |
126 | * |
127 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
128 | * acpi_payload_size == bloblen |
129 | */ |
130 | body_start = sizeof dfl_hdr; |
131 | |
132 | if (bloblen < body_start) { |
133 | error_setg(errp, "ACPI table claiming to have header is too " |
134 | "short, available: %zu, expected: %zu" , bloblen, |
135 | body_start); |
136 | return; |
137 | } |
138 | hdr_src = blob; |
139 | } else { |
140 | /* _length | ACPI header in template | blob body |
141 | * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^ |
142 | * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size |
143 | * == bloblen |
144 | * |
145 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
146 | * acpi_payload_size |
147 | */ |
148 | body_start = 0; |
149 | hdr_src = dfl_hdr; |
150 | } |
151 | body_size = bloblen - body_start; |
152 | acpi_payload_size = sizeof dfl_hdr + body_size; |
153 | |
154 | if (acpi_payload_size > UINT16_MAX) { |
155 | error_setg(errp, "ACPI table too big, requested: %zu, max: %u" , |
156 | acpi_payload_size, (unsigned)UINT16_MAX); |
157 | return; |
158 | } |
159 | |
160 | /* We won't fail from here on. Initialize / extend the globals. */ |
161 | if (acpi_tables == NULL) { |
162 | acpi_tables_len = sizeof(uint16_t); |
163 | acpi_tables = g_malloc0(acpi_tables_len); |
164 | } |
165 | |
166 | acpi_tables = g_realloc(acpi_tables, acpi_tables_len + |
167 | ACPI_TABLE_PFX_SIZE + |
168 | sizeof dfl_hdr + body_size); |
169 | |
170 | ext_hdr = (struct acpi_table_header *)(acpi_tables + acpi_tables_len); |
171 | acpi_tables_len += ACPI_TABLE_PFX_SIZE; |
172 | |
173 | memcpy(acpi_tables + acpi_tables_len, hdr_src, sizeof dfl_hdr); |
174 | acpi_tables_len += sizeof dfl_hdr; |
175 | |
176 | if (blob != NULL) { |
177 | memcpy(acpi_tables + acpi_tables_len, blob + body_start, body_size); |
178 | acpi_tables_len += body_size; |
179 | } |
180 | |
181 | /* increase number of tables */ |
182 | stw_le_p(acpi_tables, lduw_le_p(acpi_tables) + 1u); |
183 | |
184 | /* Update the header fields. The strings need not be NUL-terminated. */ |
185 | changed_fields = 0; |
186 | ext_hdr->_length = cpu_to_le16(acpi_payload_size); |
187 | |
188 | if (hdrs->has_sig) { |
189 | strncpy(ext_hdr->sig, hdrs->sig, sizeof ext_hdr->sig); |
190 | ++changed_fields; |
191 | } |
192 | |
193 | if (has_header && le32_to_cpu(ext_hdr->length) != acpi_payload_size) { |
194 | warn_report("ACPI table has wrong length, header says " |
195 | "%" PRIu32 ", actual size %zu bytes" , |
196 | le32_to_cpu(ext_hdr->length), acpi_payload_size); |
197 | } |
198 | ext_hdr->length = cpu_to_le32(acpi_payload_size); |
199 | |
200 | if (hdrs->has_rev) { |
201 | ext_hdr->revision = hdrs->rev; |
202 | ++changed_fields; |
203 | } |
204 | |
205 | ext_hdr->checksum = 0; |
206 | |
207 | if (hdrs->has_oem_id) { |
208 | strncpy(ext_hdr->oem_id, hdrs->oem_id, sizeof ext_hdr->oem_id); |
209 | ++changed_fields; |
210 | } |
211 | if (hdrs->has_oem_table_id) { |
212 | strncpy(ext_hdr->oem_table_id, hdrs->oem_table_id, |
213 | sizeof ext_hdr->oem_table_id); |
214 | ++changed_fields; |
215 | } |
216 | if (hdrs->has_oem_rev) { |
217 | ext_hdr->oem_revision = cpu_to_le32(hdrs->oem_rev); |
218 | ++changed_fields; |
219 | } |
220 | if (hdrs->has_asl_compiler_id) { |
221 | strncpy(ext_hdr->asl_compiler_id, hdrs->asl_compiler_id, |
222 | sizeof ext_hdr->asl_compiler_id); |
223 | ++changed_fields; |
224 | } |
225 | if (hdrs->has_asl_compiler_rev) { |
226 | ext_hdr->asl_compiler_revision = cpu_to_le32(hdrs->asl_compiler_rev); |
227 | ++changed_fields; |
228 | } |
229 | |
230 | if (!has_header && changed_fields == 0) { |
231 | warn_report("ACPI table: no headers are specified" ); |
232 | } |
233 | |
234 | /* recalculate checksum */ |
235 | ext_hdr->checksum = acpi_checksum((const char unsigned *)ext_hdr + |
236 | ACPI_TABLE_PFX_SIZE, acpi_payload_size); |
237 | } |
238 | |
239 | void acpi_table_add(const QemuOpts *opts, Error **errp) |
240 | { |
241 | AcpiTableOptions *hdrs = NULL; |
242 | Error *err = NULL; |
243 | char **pathnames = NULL; |
244 | char **cur; |
245 | size_t bloblen = 0; |
246 | char unsigned *blob = NULL; |
247 | |
248 | { |
249 | Visitor *v; |
250 | |
251 | v = opts_visitor_new(opts); |
252 | visit_type_AcpiTableOptions(v, NULL, &hdrs, &err); |
253 | visit_free(v); |
254 | } |
255 | |
256 | if (err) { |
257 | goto out; |
258 | } |
259 | if (hdrs->has_file == hdrs->has_data) { |
260 | error_setg(&err, "'-acpitable' requires one of 'data' or 'file'" ); |
261 | goto out; |
262 | } |
263 | |
264 | pathnames = g_strsplit(hdrs->has_file ? hdrs->file : hdrs->data, ":" , 0); |
265 | if (pathnames == NULL || pathnames[0] == NULL) { |
266 | error_setg(&err, "'-acpitable' requires at least one pathname" ); |
267 | goto out; |
268 | } |
269 | |
270 | /* now read in the data files, reallocating buffer as needed */ |
271 | for (cur = pathnames; *cur; ++cur) { |
272 | int fd = open(*cur, O_RDONLY | O_BINARY); |
273 | |
274 | if (fd < 0) { |
275 | error_setg(&err, "can't open file %s: %s" , *cur, strerror(errno)); |
276 | goto out; |
277 | } |
278 | |
279 | for (;;) { |
280 | char unsigned data[8192]; |
281 | ssize_t r; |
282 | |
283 | r = read(fd, data, sizeof data); |
284 | if (r == 0) { |
285 | break; |
286 | } else if (r > 0) { |
287 | blob = g_realloc(blob, bloblen + r); |
288 | memcpy(blob + bloblen, data, r); |
289 | bloblen += r; |
290 | } else if (errno != EINTR) { |
291 | error_setg(&err, "can't read file %s: %s" , |
292 | *cur, strerror(errno)); |
293 | close(fd); |
294 | goto out; |
295 | } |
296 | } |
297 | |
298 | close(fd); |
299 | } |
300 | |
301 | acpi_table_install(blob, bloblen, hdrs->has_file, hdrs, &err); |
302 | |
303 | out: |
304 | g_free(blob); |
305 | g_strfreev(pathnames); |
306 | qapi_free_AcpiTableOptions(hdrs); |
307 | |
308 | error_propagate(errp, err); |
309 | } |
310 | |
311 | unsigned acpi_table_len(void *current) |
312 | { |
313 | struct acpi_table_header *hdr = current - sizeof(hdr->_length); |
314 | return hdr->_length; |
315 | } |
316 | |
317 | static |
318 | void *acpi_table_hdr(void *h) |
319 | { |
320 | struct acpi_table_header *hdr = h; |
321 | return &hdr->sig; |
322 | } |
323 | |
324 | uint8_t *acpi_table_first(void) |
325 | { |
326 | if (!acpi_tables) { |
327 | return NULL; |
328 | } |
329 | return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE); |
330 | } |
331 | |
332 | uint8_t *acpi_table_next(uint8_t *current) |
333 | { |
334 | uint8_t *next = current + acpi_table_len(current); |
335 | |
336 | if (next - acpi_tables >= acpi_tables_len) { |
337 | return NULL; |
338 | } else { |
339 | return acpi_table_hdr(next); |
340 | } |
341 | } |
342 | |
343 | int acpi_get_slic_oem(AcpiSlicOem *oem) |
344 | { |
345 | uint8_t *u; |
346 | |
347 | for (u = acpi_table_first(); u; u = acpi_table_next(u)) { |
348 | struct acpi_table_header *hdr = (void *)(u - sizeof(hdr->_length)); |
349 | |
350 | if (memcmp(hdr->sig, "SLIC" , 4) == 0) { |
351 | oem->id = hdr->oem_id; |
352 | oem->table_id = hdr->oem_table_id; |
353 | return 0; |
354 | } |
355 | } |
356 | return -1; |
357 | } |
358 | |
359 | static void acpi_notify_wakeup(Notifier *notifier, void *data) |
360 | { |
361 | ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup); |
362 | WakeupReason *reason = data; |
363 | |
364 | switch (*reason) { |
365 | case QEMU_WAKEUP_REASON_RTC: |
366 | ar->pm1.evt.sts |= |
367 | (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS); |
368 | break; |
369 | case QEMU_WAKEUP_REASON_PMTIMER: |
370 | ar->pm1.evt.sts |= |
371 | (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS); |
372 | break; |
373 | case QEMU_WAKEUP_REASON_OTHER: |
374 | /* ACPI_BITMASK_WAKE_STATUS should be set on resume. |
375 | Pretend that resume was caused by power button */ |
376 | ar->pm1.evt.sts |= |
377 | (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS); |
378 | break; |
379 | default: |
380 | break; |
381 | } |
382 | } |
383 | |
384 | /* ACPI PM1a EVT */ |
385 | uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar) |
386 | { |
387 | /* Compare ns-clock, not PM timer ticks, because |
388 | acpi_pm_tmr_update function uses ns for setting the timer. */ |
389 | int64_t d = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
390 | if (d >= muldiv64(ar->tmr.overflow_time, |
391 | NANOSECONDS_PER_SECOND, PM_TIMER_FREQUENCY)) { |
392 | ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS; |
393 | } |
394 | return ar->pm1.evt.sts; |
395 | } |
396 | |
397 | static void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val) |
398 | { |
399 | uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar); |
400 | if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) { |
401 | /* if TMRSTS is reset, then compute the new overflow time */ |
402 | acpi_pm_tmr_calc_overflow_time(ar); |
403 | } |
404 | ar->pm1.evt.sts &= ~val; |
405 | } |
406 | |
407 | static void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val) |
408 | { |
409 | ar->pm1.evt.en = val; |
410 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, |
411 | val & ACPI_BITMASK_RT_CLOCK_ENABLE); |
412 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, |
413 | val & ACPI_BITMASK_TIMER_ENABLE); |
414 | } |
415 | |
416 | void acpi_pm1_evt_power_down(ACPIREGS *ar) |
417 | { |
418 | if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) { |
419 | ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS; |
420 | ar->tmr.update_sci(ar); |
421 | } |
422 | } |
423 | |
424 | void acpi_pm1_evt_reset(ACPIREGS *ar) |
425 | { |
426 | ar->pm1.evt.sts = 0; |
427 | ar->pm1.evt.en = 0; |
428 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0); |
429 | qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0); |
430 | } |
431 | |
432 | static uint64_t acpi_pm_evt_read(void *opaque, hwaddr addr, unsigned width) |
433 | { |
434 | ACPIREGS *ar = opaque; |
435 | switch (addr) { |
436 | case 0: |
437 | return acpi_pm1_evt_get_sts(ar); |
438 | case 2: |
439 | return ar->pm1.evt.en; |
440 | default: |
441 | return 0; |
442 | } |
443 | } |
444 | |
445 | static void acpi_pm_evt_write(void *opaque, hwaddr addr, uint64_t val, |
446 | unsigned width) |
447 | { |
448 | ACPIREGS *ar = opaque; |
449 | switch (addr) { |
450 | case 0: |
451 | acpi_pm1_evt_write_sts(ar, val); |
452 | ar->pm1.evt.update_sci(ar); |
453 | break; |
454 | case 2: |
455 | acpi_pm1_evt_write_en(ar, val); |
456 | ar->pm1.evt.update_sci(ar); |
457 | break; |
458 | } |
459 | } |
460 | |
461 | static const MemoryRegionOps acpi_pm_evt_ops = { |
462 | .read = acpi_pm_evt_read, |
463 | .write = acpi_pm_evt_write, |
464 | .valid.min_access_size = 2, |
465 | .valid.max_access_size = 2, |
466 | .endianness = DEVICE_LITTLE_ENDIAN, |
467 | }; |
468 | |
469 | void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn update_sci, |
470 | MemoryRegion *parent) |
471 | { |
472 | ar->pm1.evt.update_sci = update_sci; |
473 | memory_region_init_io(&ar->pm1.evt.io, memory_region_owner(parent), |
474 | &acpi_pm_evt_ops, ar, "acpi-evt" , 4); |
475 | memory_region_add_subregion(parent, 0, &ar->pm1.evt.io); |
476 | } |
477 | |
478 | /* ACPI PM_TMR */ |
479 | void acpi_pm_tmr_update(ACPIREGS *ar, bool enable) |
480 | { |
481 | int64_t expire_time; |
482 | |
483 | /* schedule a timer interruption if needed */ |
484 | if (enable) { |
485 | expire_time = muldiv64(ar->tmr.overflow_time, NANOSECONDS_PER_SECOND, |
486 | PM_TIMER_FREQUENCY); |
487 | timer_mod(ar->tmr.timer, expire_time); |
488 | } else { |
489 | timer_del(ar->tmr.timer); |
490 | } |
491 | } |
492 | |
493 | static inline int64_t acpi_pm_tmr_get_clock(void) |
494 | { |
495 | return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), PM_TIMER_FREQUENCY, |
496 | NANOSECONDS_PER_SECOND); |
497 | } |
498 | |
499 | void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar) |
500 | { |
501 | int64_t d = acpi_pm_tmr_get_clock(); |
502 | ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL; |
503 | } |
504 | |
505 | static uint32_t acpi_pm_tmr_get(ACPIREGS *ar) |
506 | { |
507 | uint32_t d = acpi_pm_tmr_get_clock(); |
508 | return d & 0xffffff; |
509 | } |
510 | |
511 | static void acpi_pm_tmr_timer(void *opaque) |
512 | { |
513 | ACPIREGS *ar = opaque; |
514 | |
515 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER, NULL); |
516 | ar->tmr.update_sci(ar); |
517 | } |
518 | |
519 | static uint64_t acpi_pm_tmr_read(void *opaque, hwaddr addr, unsigned width) |
520 | { |
521 | return acpi_pm_tmr_get(opaque); |
522 | } |
523 | |
524 | static void acpi_pm_tmr_write(void *opaque, hwaddr addr, uint64_t val, |
525 | unsigned width) |
526 | { |
527 | /* nothing */ |
528 | } |
529 | |
530 | static const MemoryRegionOps acpi_pm_tmr_ops = { |
531 | .read = acpi_pm_tmr_read, |
532 | .write = acpi_pm_tmr_write, |
533 | .valid.min_access_size = 4, |
534 | .valid.max_access_size = 4, |
535 | .endianness = DEVICE_LITTLE_ENDIAN, |
536 | }; |
537 | |
538 | void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci, |
539 | MemoryRegion *parent) |
540 | { |
541 | ar->tmr.update_sci = update_sci; |
542 | ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar); |
543 | memory_region_init_io(&ar->tmr.io, memory_region_owner(parent), |
544 | &acpi_pm_tmr_ops, ar, "acpi-tmr" , 4); |
545 | memory_region_add_subregion(parent, 8, &ar->tmr.io); |
546 | } |
547 | |
548 | void acpi_pm_tmr_reset(ACPIREGS *ar) |
549 | { |
550 | ar->tmr.overflow_time = 0; |
551 | timer_del(ar->tmr.timer); |
552 | } |
553 | |
554 | /* ACPI PM1aCNT */ |
555 | static void acpi_pm1_cnt_write(ACPIREGS *ar, uint16_t val) |
556 | { |
557 | ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE); |
558 | |
559 | if (val & ACPI_BITMASK_SLEEP_ENABLE) { |
560 | /* change suspend type */ |
561 | uint16_t sus_typ = (val >> 10) & 7; |
562 | switch(sus_typ) { |
563 | case 0: /* soft power off */ |
564 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
565 | break; |
566 | case 1: |
567 | qemu_system_suspend_request(); |
568 | break; |
569 | default: |
570 | if (sus_typ == ar->pm1.cnt.s4_val) { /* S4 request */ |
571 | qapi_event_send_suspend_disk(); |
572 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
573 | } |
574 | break; |
575 | } |
576 | } |
577 | } |
578 | |
579 | void acpi_pm1_cnt_update(ACPIREGS *ar, |
580 | bool sci_enable, bool sci_disable) |
581 | { |
582 | /* ACPI specs 3.0, 4.7.2.5 */ |
583 | if (sci_enable) { |
584 | ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE; |
585 | } else if (sci_disable) { |
586 | ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE; |
587 | } |
588 | } |
589 | |
590 | static uint64_t acpi_pm_cnt_read(void *opaque, hwaddr addr, unsigned width) |
591 | { |
592 | ACPIREGS *ar = opaque; |
593 | return ar->pm1.cnt.cnt; |
594 | } |
595 | |
596 | static void acpi_pm_cnt_write(void *opaque, hwaddr addr, uint64_t val, |
597 | unsigned width) |
598 | { |
599 | acpi_pm1_cnt_write(opaque, val); |
600 | } |
601 | |
602 | static const MemoryRegionOps acpi_pm_cnt_ops = { |
603 | .read = acpi_pm_cnt_read, |
604 | .write = acpi_pm_cnt_write, |
605 | .valid.min_access_size = 2, |
606 | .valid.max_access_size = 2, |
607 | .endianness = DEVICE_LITTLE_ENDIAN, |
608 | }; |
609 | |
610 | void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent, |
611 | bool disable_s3, bool disable_s4, uint8_t s4_val) |
612 | { |
613 | FWCfgState *fw_cfg; |
614 | |
615 | ar->pm1.cnt.s4_val = s4_val; |
616 | ar->wakeup.notify = acpi_notify_wakeup; |
617 | qemu_register_wakeup_notifier(&ar->wakeup); |
618 | |
619 | /* |
620 | * Register wake-up support in QMP query-current-machine API |
621 | */ |
622 | qemu_register_wakeup_support(); |
623 | |
624 | memory_region_init_io(&ar->pm1.cnt.io, memory_region_owner(parent), |
625 | &acpi_pm_cnt_ops, ar, "acpi-cnt" , 2); |
626 | memory_region_add_subregion(parent, 4, &ar->pm1.cnt.io); |
627 | |
628 | fw_cfg = fw_cfg_find(); |
629 | if (fw_cfg) { |
630 | uint8_t suspend[6] = {128, 0, 0, 129, 128, 128}; |
631 | suspend[3] = 1 | ((!disable_s3) << 7); |
632 | suspend[4] = s4_val | ((!disable_s4) << 7); |
633 | |
634 | fw_cfg_add_file(fw_cfg, "etc/system-states" , g_memdup(suspend, 6), 6); |
635 | } |
636 | } |
637 | |
638 | void acpi_pm1_cnt_reset(ACPIREGS *ar) |
639 | { |
640 | ar->pm1.cnt.cnt = 0; |
641 | } |
642 | |
643 | /* ACPI GPE */ |
644 | void acpi_gpe_init(ACPIREGS *ar, uint8_t len) |
645 | { |
646 | ar->gpe.len = len; |
647 | /* Only first len / 2 bytes are ever used, |
648 | * but the caller in ich9.c migrates full len bytes. |
649 | * TODO: fix ich9.c and drop the extra allocation. |
650 | */ |
651 | ar->gpe.sts = g_malloc0(len); |
652 | ar->gpe.en = g_malloc0(len); |
653 | } |
654 | |
655 | void acpi_gpe_reset(ACPIREGS *ar) |
656 | { |
657 | memset(ar->gpe.sts, 0, ar->gpe.len / 2); |
658 | memset(ar->gpe.en, 0, ar->gpe.len / 2); |
659 | } |
660 | |
661 | static uint8_t *acpi_gpe_ioport_get_ptr(ACPIREGS *ar, uint32_t addr) |
662 | { |
663 | uint8_t *cur = NULL; |
664 | |
665 | if (addr < ar->gpe.len / 2) { |
666 | cur = ar->gpe.sts + addr; |
667 | } else if (addr < ar->gpe.len) { |
668 | cur = ar->gpe.en + addr - ar->gpe.len / 2; |
669 | } else { |
670 | abort(); |
671 | } |
672 | |
673 | return cur; |
674 | } |
675 | |
676 | void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val) |
677 | { |
678 | uint8_t *cur; |
679 | |
680 | cur = acpi_gpe_ioport_get_ptr(ar, addr); |
681 | if (addr < ar->gpe.len / 2) { |
682 | /* GPE_STS */ |
683 | *cur = (*cur) & ~val; |
684 | } else if (addr < ar->gpe.len) { |
685 | /* GPE_EN */ |
686 | *cur = val; |
687 | } else { |
688 | abort(); |
689 | } |
690 | } |
691 | |
692 | uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr) |
693 | { |
694 | uint8_t *cur; |
695 | uint32_t val; |
696 | |
697 | cur = acpi_gpe_ioport_get_ptr(ar, addr); |
698 | val = 0; |
699 | if (cur != NULL) { |
700 | val = *cur; |
701 | } |
702 | |
703 | return val; |
704 | } |
705 | |
706 | void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq, |
707 | AcpiEventStatusBits status) |
708 | { |
709 | ar->gpe.sts[0] |= status; |
710 | acpi_update_sci(ar, irq); |
711 | } |
712 | |
713 | void acpi_update_sci(ACPIREGS *regs, qemu_irq irq) |
714 | { |
715 | int sci_level, pm1a_sts; |
716 | |
717 | pm1a_sts = acpi_pm1_evt_get_sts(regs); |
718 | |
719 | sci_level = ((pm1a_sts & |
720 | regs->pm1.evt.en & ACPI_BITMASK_PM1_COMMON_ENABLED) != 0) || |
721 | ((regs->gpe.sts[0] & regs->gpe.en[0]) != 0); |
722 | |
723 | qemu_set_irq(irq, sci_level); |
724 | |
725 | /* schedule a timer interruption if needed */ |
726 | acpi_pm_tmr_update(regs, |
727 | (regs->pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) && |
728 | !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS)); |
729 | } |
730 | |