meson: convert qapi-specific to meson
[qemu.git] / hw / acpi / core.c
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 acpi_table_header {
37 uint16_t _length; /* our length, not actual part of the hdr */
38 /* allows easier parsing for fw_cfg clients */
39 char sig[4]
40 QEMU_NONSTRING; /* ACPI signature (4 ASCII characters) */
41 uint32_t length; /* Length of table, in bytes, including header */
42 uint8_t revision; /* ACPI Specification minor version # */
43 uint8_t checksum; /* To make sum of entire table == 0 */
44 char oem_id[6]
45 QEMU_NONSTRING; /* OEM identification */
46 char oem_table_id[8]
47 QEMU_NONSTRING; /* OEM table identification */
48 uint32_t oem_revision; /* OEM revision number */
49 char asl_compiler_id[4]
50 QEMU_NONSTRING; /* ASL compiler vendor ID */
51 uint32_t asl_compiler_revision; /* 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 has_header,
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 char **pathnames = NULL;
243 char **cur;
244 size_t bloblen = 0;
245 char unsigned *blob = NULL;
246
247 {
248 Visitor *v;
249
250 v = opts_visitor_new(opts);
251 visit_type_AcpiTableOptions(v, NULL, &hdrs, errp);
252 visit_free(v);
253 }
254
255 if (!hdrs) {
256 goto out;
257 }
258 if (hdrs->has_file == hdrs->has_data) {
259 error_setg(errp, "'-acpitable' requires one of 'data' or 'file'");
260 goto out;
261 }
262
263 pathnames = g_strsplit(hdrs->has_file ? hdrs->file : hdrs->data, ":", 0);
264 if (pathnames == NULL || pathnames[0] == NULL) {
265 error_setg(errp, "'-acpitable' requires at least one pathname");
266 goto out;
267 }
268
269 /* now read in the data files, reallocating buffer as needed */
270 for (cur = pathnames; *cur; ++cur) {
271 int fd = open(*cur, O_RDONLY | O_BINARY);
272
273 if (fd < 0) {
274 error_setg(errp, "can't open file %s: %s", *cur, strerror(errno));
275 goto out;
276 }
277
278 for (;;) {
279 char unsigned data[8192];
280 ssize_t r;
281
282 r = read(fd, data, sizeof data);
283 if (r == 0) {
284 break;
285 } else if (r > 0) {
286 blob = g_realloc(blob, bloblen + r);
287 memcpy(blob + bloblen, data, r);
288 bloblen += r;
289 } else if (errno != EINTR) {
290 error_setg(errp, "can't read file %s: %s", *cur,
291 strerror(errno));
292 close(fd);
293 goto out;
294 }
295 }
296
297 close(fd);
298 }
299
300 acpi_table_install(blob, bloblen, hdrs->has_file, hdrs, errp);
301
302 out:
303 g_free(blob);
304 g_strfreev(pathnames);
305 qapi_free_AcpiTableOptions(hdrs);
306 }
307
308 unsigned acpi_table_len(void *current)
309 {
310 struct acpi_table_header *hdr = current - sizeof(hdr->_length);
311 return hdr->_length;
312 }
313
314 static
315 void *acpi_table_hdr(void *h)
316 {
317 struct acpi_table_header *hdr = h;
318 return &hdr->sig;
319 }
320
321 uint8_t *acpi_table_first(void)
322 {
323 if (!acpi_tables) {
324 return NULL;
325 }
326 return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE);
327 }
328
329 uint8_t *acpi_table_next(uint8_t *current)
330 {
331 uint8_t *next = current + acpi_table_len(current);
332
333 if (next - acpi_tables >= acpi_tables_len) {
334 return NULL;
335 } else {
336 return acpi_table_hdr(next);
337 }
338 }
339
340 int acpi_get_slic_oem(AcpiSlicOem *oem)
341 {
342 uint8_t *u;
343
344 for (u = acpi_table_first(); u; u = acpi_table_next(u)) {
345 struct acpi_table_header *hdr = (void *)(u - sizeof(hdr->_length));
346
347 if (memcmp(hdr->sig, "SLIC", 4) == 0) {
348 oem->id = hdr->oem_id;
349 oem->table_id = hdr->oem_table_id;
350 return 0;
351 }
352 }
353 return -1;
354 }
355
356 static void acpi_notify_wakeup(Notifier *notifier, void *data)
357 {
358 ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);
359 WakeupReason *reason = data;
360
361 switch (*reason) {
362 case QEMU_WAKEUP_REASON_RTC:
363 ar->pm1.evt.sts |=
364 (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS);
365 break;
366 case QEMU_WAKEUP_REASON_PMTIMER:
367 ar->pm1.evt.sts |=
368 (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS);
369 break;
370 case QEMU_WAKEUP_REASON_OTHER:
371 /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
372 Pretend that resume was caused by power button */
373 ar->pm1.evt.sts |=
374 (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS);
375 break;
376 default:
377 break;
378 }
379 }
380
381 /* ACPI PM1a EVT */
382 uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar)
383 {
384 /* Compare ns-clock, not PM timer ticks, because
385 acpi_pm_tmr_update function uses ns for setting the timer. */
386 int64_t d = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
387 if (d >= muldiv64(ar->tmr.overflow_time,
388 NANOSECONDS_PER_SECOND, PM_TIMER_FREQUENCY)) {
389 ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS;
390 }
391 return ar->pm1.evt.sts;
392 }
393
394 static void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val)
395 {
396 uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar);
397 if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
398 /* if TMRSTS is reset, then compute the new overflow time */
399 acpi_pm_tmr_calc_overflow_time(ar);
400 }
401 ar->pm1.evt.sts &= ~val;
402 }
403
404 static void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val)
405 {
406 ar->pm1.evt.en = val;
407 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC,
408 val & ACPI_BITMASK_RT_CLOCK_ENABLE);
409 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER,
410 val & ACPI_BITMASK_TIMER_ENABLE);
411 }
412
413 void acpi_pm1_evt_power_down(ACPIREGS *ar)
414 {
415 if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
416 ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
417 ar->tmr.update_sci(ar);
418 }
419 }
420
421 void acpi_pm1_evt_reset(ACPIREGS *ar)
422 {
423 ar->pm1.evt.sts = 0;
424 ar->pm1.evt.en = 0;
425 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0);
426 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0);
427 }
428
429 static uint64_t acpi_pm_evt_read(void *opaque, hwaddr addr, unsigned width)
430 {
431 ACPIREGS *ar = opaque;
432 switch (addr) {
433 case 0:
434 return acpi_pm1_evt_get_sts(ar);
435 case 2:
436 return ar->pm1.evt.en;
437 default:
438 return 0;
439 }
440 }
441
442 static void acpi_pm_evt_write(void *opaque, hwaddr addr, uint64_t val,
443 unsigned width)
444 {
445 ACPIREGS *ar = opaque;
446 switch (addr) {
447 case 0:
448 acpi_pm1_evt_write_sts(ar, val);
449 ar->pm1.evt.update_sci(ar);
450 break;
451 case 2:
452 acpi_pm1_evt_write_en(ar, val);
453 ar->pm1.evt.update_sci(ar);
454 break;
455 }
456 }
457
458 static const MemoryRegionOps acpi_pm_evt_ops = {
459 .read = acpi_pm_evt_read,
460 .write = acpi_pm_evt_write,
461 .impl.min_access_size = 2,
462 .valid.min_access_size = 1,
463 .valid.max_access_size = 2,
464 .endianness = DEVICE_LITTLE_ENDIAN,
465 };
466
467 void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
468 MemoryRegion *parent)
469 {
470 ar->pm1.evt.update_sci = update_sci;
471 memory_region_init_io(&ar->pm1.evt.io, memory_region_owner(parent),
472 &acpi_pm_evt_ops, ar, "acpi-evt", 4);
473 memory_region_add_subregion(parent, 0, &ar->pm1.evt.io);
474 }
475
476 /* ACPI PM_TMR */
477 void acpi_pm_tmr_update(ACPIREGS *ar, bool enable)
478 {
479 int64_t expire_time;
480
481 /* schedule a timer interruption if needed */
482 if (enable) {
483 expire_time = muldiv64(ar->tmr.overflow_time, NANOSECONDS_PER_SECOND,
484 PM_TIMER_FREQUENCY);
485 timer_mod(ar->tmr.timer, expire_time);
486 } else {
487 timer_del(ar->tmr.timer);
488 }
489 }
490
491 static inline int64_t acpi_pm_tmr_get_clock(void)
492 {
493 return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), PM_TIMER_FREQUENCY,
494 NANOSECONDS_PER_SECOND);
495 }
496
497 void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar)
498 {
499 int64_t d = acpi_pm_tmr_get_clock();
500 ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
501 }
502
503 static uint32_t acpi_pm_tmr_get(ACPIREGS *ar)
504 {
505 uint32_t d = acpi_pm_tmr_get_clock();
506 return d & 0xffffff;
507 }
508
509 static void acpi_pm_tmr_timer(void *opaque)
510 {
511 ACPIREGS *ar = opaque;
512
513 qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER, NULL);
514 ar->tmr.update_sci(ar);
515 }
516
517 static uint64_t acpi_pm_tmr_read(void *opaque, hwaddr addr, unsigned width)
518 {
519 return acpi_pm_tmr_get(opaque);
520 }
521
522 static void acpi_pm_tmr_write(void *opaque, hwaddr addr, uint64_t val,
523 unsigned width)
524 {
525 /* nothing */
526 }
527
528 static const MemoryRegionOps acpi_pm_tmr_ops = {
529 .read = acpi_pm_tmr_read,
530 .write = acpi_pm_tmr_write,
531 .impl.min_access_size = 4,
532 .valid.min_access_size = 1,
533 .valid.max_access_size = 4,
534 .endianness = DEVICE_LITTLE_ENDIAN,
535 };
536
537 void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
538 MemoryRegion *parent)
539 {
540 ar->tmr.update_sci = update_sci;
541 ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar);
542 memory_region_init_io(&ar->tmr.io, memory_region_owner(parent),
543 &acpi_pm_tmr_ops, ar, "acpi-tmr", 4);
544 memory_region_add_subregion(parent, 8, &ar->tmr.io);
545 }
546
547 void acpi_pm_tmr_reset(ACPIREGS *ar)
548 {
549 ar->tmr.overflow_time = 0;
550 timer_del(ar->tmr.timer);
551 }
552
553 /* ACPI PM1aCNT */
554 static void acpi_pm1_cnt_write(ACPIREGS *ar, uint16_t val)
555 {
556 ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
557
558 if (val & ACPI_BITMASK_SLEEP_ENABLE) {
559 /* change suspend type */
560 uint16_t sus_typ = (val >> 10) & 7;
561 switch(sus_typ) {
562 case 0: /* soft power off */
563 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
564 break;
565 case 1:
566 qemu_system_suspend_request();
567 break;
568 default:
569 if (sus_typ == ar->pm1.cnt.s4_val) { /* S4 request */
570 qapi_event_send_suspend_disk();
571 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
572 }
573 break;
574 }
575 }
576 }
577
578 void acpi_pm1_cnt_update(ACPIREGS *ar,
579 bool sci_enable, bool sci_disable)
580 {
581 /* ACPI specs 3.0, 4.7.2.5 */
582 if (sci_enable) {
583 ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
584 } else if (sci_disable) {
585 ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE;
586 }
587 }
588
589 static uint64_t acpi_pm_cnt_read(void *opaque, hwaddr addr, unsigned width)
590 {
591 ACPIREGS *ar = opaque;
592 return ar->pm1.cnt.cnt;
593 }
594
595 static void acpi_pm_cnt_write(void *opaque, hwaddr addr, uint64_t val,
596 unsigned width)
597 {
598 acpi_pm1_cnt_write(opaque, val);
599 }
600
601 static const MemoryRegionOps acpi_pm_cnt_ops = {
602 .read = acpi_pm_cnt_read,
603 .write = acpi_pm_cnt_write,
604 .impl.min_access_size = 2,
605 .valid.min_access_size = 1,
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 }