1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25 /*
26 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
27 */
28
29 /*
30 * PSMI 1.1 extensions are supported only in 2.6 and later versions.
31 * PSMI 1.2 extensions are supported only in 2.7 and later versions.
32 * PSMI 1.3 and 1.4 extensions are supported in Solaris 10.
33 * PSMI 1.5 extensions are supported in Solaris Nevada.
34 * PSMI 1.6 extensions are supported in Solaris Nevada.
35 * PSMI 1.7 extensions are supported in Solaris Nevada.
36 */
37 #define PSMI_1_7
38
39 #include <sys/processor.h>
40 #include <sys/time.h>
41 #include <sys/psm.h>
42 #include <sys/smp_impldefs.h>
43 #include <sys/cram.h>
44 #include <sys/acpi/acpi.h>
45 #include <sys/acpica.h>
46 #include <sys/psm_common.h>
47 #include <sys/apic.h>
48 #include <sys/pit.h>
49 #include <sys/ddi.h>
50 #include <sys/sunddi.h>
51 #include <sys/ddi_impldefs.h>
52 #include <sys/pci.h>
53 #include <sys/promif.h>
54 #include <sys/x86_archext.h>
55 #include <sys/cpc_impl.h>
56 #include <sys/uadmin.h>
57 #include <sys/panic.h>
58 #include <sys/debug.h>
59 #include <sys/archsystm.h>
60 #include <sys/trap.h>
61 #include <sys/machsystm.h>
62 #include <sys/sysmacros.h>
63 #include <sys/cpuvar.h>
64 #include <sys/rm_platter.h>
65 #include <sys/privregs.h>
66 #include <sys/note.h>
67 #include <sys/pci_intr_lib.h>
68 #include <sys/spl.h>
69 #include <sys/clock.h>
70 #include <sys/dditypes.h>
71 #include <sys/sunddi.h>
72 #include <sys/x_call.h>
73 #include <sys/reboot.h>
74 #include <sys/hpet.h>
75 #include <sys/apic_common.h>
76 #include <sys/apic_timer.h>
77
78 static void apic_record_ioapic_rdt(void *intrmap_private,
79 ioapic_rdt_t *irdt);
80 static void apic_record_msi(void *intrmap_private, msi_regs_t *mregs);
81
82 /*
83 * Common routines between pcplusmp & apix (taken from apic.c).
84 */
85
86 int apic_clkinit(int);
87 hrtime_t apic_gethrtime(void);
88 void apic_send_ipi(int, int);
89 void apic_set_idlecpu(processorid_t);
90 void apic_unset_idlecpu(processorid_t);
91 void apic_shutdown(int, int);
92 void apic_preshutdown(int, int);
93 processorid_t apic_get_next_processorid(processorid_t);
94
95 hrtime_t apic_gettime();
96
97 enum apic_ioapic_method_type apix_mul_ioapic_method = APIC_MUL_IOAPIC_PCPLUSMP;
98
99 /* Now the ones for Dynamic Interrupt distribution */
100 int apic_enable_dynamic_migration = 0;
101
102 /* maximum loop count when sending Start IPIs. */
103 int apic_sipi_max_loop_count = 0x1000;
104
105 /*
106 * These variables are frequently accessed in apic_intr_enter(),
107 * apic_intr_exit and apic_setspl, so group them together
108 */
109 volatile uint32_t *apicadr = NULL; /* virtual addr of local APIC */
110 int apic_setspl_delay = 1; /* apic_setspl - delay enable */
111 int apic_clkvect;
112
113 /* vector at which error interrupts come in */
114 int apic_errvect;
115 int apic_enable_error_intr = 1;
116 int apic_error_display_delay = 100;
117
118 /* vector at which performance counter overflow interrupts come in */
119 int apic_cpcovf_vect;
120 int apic_enable_cpcovf_intr = 1;
121
122 /* vector at which CMCI interrupts come in */
123 int apic_cmci_vect;
124 extern int cmi_enable_cmci;
125 extern void cmi_cmci_trap(void);
126
127 kmutex_t cmci_cpu_setup_lock; /* protects cmci_cpu_setup_registered */
128 int cmci_cpu_setup_registered;
129
130 /* number of CPUs in power-on transition state */
131 static int apic_poweron_cnt = 0;
132 lock_t apic_mode_switch_lock;
133
134 /*
135 * Patchable global variables.
136 */
137 int apic_forceload = 0;
138
139 int apic_coarse_hrtime = 1; /* 0 - use accurate slow gethrtime() */
140
141 int apic_flat_model = 0; /* 0 - clustered. 1 - flat */
142 int apic_panic_on_nmi = 0;
143 int apic_panic_on_apic_error = 0;
144
145 int apic_verbose = 0; /* 0x1ff */
146
147 #ifdef DEBUG
148 int apic_debug = 0;
149 int apic_restrict_vector = 0;
150
151 int apic_debug_msgbuf[APIC_DEBUG_MSGBUFSIZE];
152 int apic_debug_msgbufindex = 0;
153
154 #endif /* DEBUG */
155
156 uint_t apic_nticks = 0;
157 uint_t apic_skipped_redistribute = 0;
158
159 uint_t last_count_read = 0;
160 lock_t apic_gethrtime_lock;
161 volatile int apic_hrtime_stamp = 0;
162 volatile hrtime_t apic_nsec_since_boot = 0;
163
164 static hrtime_t apic_last_hrtime = 0;
165 int apic_hrtime_error = 0;
166 int apic_remote_hrterr = 0;
167 int apic_num_nmis = 0;
168 int apic_apic_error = 0;
169 int apic_num_apic_errors = 0;
170 int apic_num_cksum_errors = 0;
171
172 int apic_error = 0;
173
174 static int apic_cmos_ssb_set = 0;
175
176 /* use to make sure only one cpu handles the nmi */
177 lock_t apic_nmi_lock;
178 /* use to make sure only one cpu handles the error interrupt */
179 lock_t apic_error_lock;
180
181 static struct {
182 uchar_t cntl;
183 uchar_t data;
184 } aspen_bmc[] = {
185 { CC_SMS_WR_START, 0x18 }, /* NetFn/LUN */
186 { CC_SMS_WR_NEXT, 0x24 }, /* Cmd SET_WATCHDOG_TIMER */
187 { CC_SMS_WR_NEXT, 0x84 }, /* DataByte 1: SMS/OS no log */
188 { CC_SMS_WR_NEXT, 0x2 }, /* DataByte 2: Power Down */
189 { CC_SMS_WR_NEXT, 0x0 }, /* DataByte 3: no pre-timeout */
190 { CC_SMS_WR_NEXT, 0x0 }, /* DataByte 4: timer expir. */
191 { CC_SMS_WR_NEXT, 0xa }, /* DataByte 5: init countdown */
192 { CC_SMS_WR_END, 0x0 }, /* DataByte 6: init countdown */
193
194 { CC_SMS_WR_START, 0x18 }, /* NetFn/LUN */
195 { CC_SMS_WR_END, 0x22 } /* Cmd RESET_WATCHDOG_TIMER */
196 };
197
198 static struct {
199 int port;
200 uchar_t data;
201 } sitka_bmc[] = {
202 { SMS_COMMAND_REGISTER, SMS_WRITE_START },
203 { SMS_DATA_REGISTER, 0x18 }, /* NetFn/LUN */
204 { SMS_DATA_REGISTER, 0x24 }, /* Cmd SET_WATCHDOG_TIMER */
205 { SMS_DATA_REGISTER, 0x84 }, /* DataByte 1: SMS/OS no log */
206 { SMS_DATA_REGISTER, 0x2 }, /* DataByte 2: Power Down */
207 { SMS_DATA_REGISTER, 0x0 }, /* DataByte 3: no pre-timeout */
208 { SMS_DATA_REGISTER, 0x0 }, /* DataByte 4: timer expir. */
209 { SMS_DATA_REGISTER, 0xa }, /* DataByte 5: init countdown */
210 { SMS_COMMAND_REGISTER, SMS_WRITE_END },
211 { SMS_DATA_REGISTER, 0x0 }, /* DataByte 6: init countdown */
212
213 { SMS_COMMAND_REGISTER, SMS_WRITE_START },
214 { SMS_DATA_REGISTER, 0x18 }, /* NetFn/LUN */
215 { SMS_COMMAND_REGISTER, SMS_WRITE_END },
216 { SMS_DATA_REGISTER, 0x22 } /* Cmd RESET_WATCHDOG_TIMER */
217 };
218
219 /* Patchable global variables. */
220 int apic_kmdb_on_nmi = 0; /* 0 - no, 1 - yes enter kmdb */
221 uint32_t apic_divide_reg_init = 0; /* 0 - divide by 2 */
222
223 /* default apic ops without interrupt remapping */
224 static apic_intrmap_ops_t apic_nointrmap_ops = {
225 (int (*)(int))return_instr,
226 (void (*)(int))return_instr,
227 (void (*)(void **, dev_info_t *, uint16_t, int, uchar_t))return_instr,
228 (void (*)(void *, void *, uint16_t, int))return_instr,
229 (void (*)(void **))return_instr,
230 apic_record_ioapic_rdt,
231 apic_record_msi,
232 };
233
234 apic_intrmap_ops_t *apic_vt_ops = &apic_nointrmap_ops;
235 apic_cpus_info_t *apic_cpus = NULL;
236 cpuset_t apic_cpumask;
237 uint_t apic_picinit_called;
238
239 /* Flag to indicate that we need to shut down all processors */
240 static uint_t apic_shutdown_processors;
241
242 /*
243 * Probe the ioapic method for apix module. Called in apic_probe_common()
244 */
245 int
246 apic_ioapic_method_probe()
247 {
248 if (apix_enable == 0)
249 return (PSM_SUCCESS);
250
251 /*
252 * Set IOAPIC EOI handling method. The priority from low to high is:
253 * 1. IOxAPIC: with EOI register
254 * 2. IOMMU interrupt mapping
255 * 3. Mask-Before-EOI method for systems without boot
256 * interrupt routing, such as systems with only one IOAPIC;
257 * NVIDIA CK8-04/MCP55 systems; systems with bridge solution
258 * which disables the boot interrupt routing already.
259 * 4. Directed EOI
260 */
261 if (apic_io_ver[0] >= 0x20)
262 apix_mul_ioapic_method = APIC_MUL_IOAPIC_IOXAPIC;
263 if ((apic_io_max == 1) || (apic_nvidia_io_max == apic_io_max))
264 apix_mul_ioapic_method = APIC_MUL_IOAPIC_MASK;
265 if (apic_directed_EOI_supported())
266 apix_mul_ioapic_method = APIC_MUL_IOAPIC_DEOI;
267
268 /* fall back to pcplusmp */
269 if (apix_mul_ioapic_method == APIC_MUL_IOAPIC_PCPLUSMP) {
270 /* make sure apix is after pcplusmp in /etc/mach */
271 apix_enable = 0; /* go ahead with pcplusmp install next */
272 return (PSM_FAILURE);
273 }
274
275 return (PSM_SUCCESS);
276 }
277
278 /*
279 * handler for APIC Error interrupt. Just print a warning and continue
280 */
281 int
282 apic_error_intr()
283 {
284 uint_t error0, error1, error;
285 uint_t i;
286
287 /*
288 * We need to write before read as per 7.4.17 of system prog manual.
289 * We do both and or the results to be safe
290 */
291 error0 = apic_reg_ops->apic_read(APIC_ERROR_STATUS);
292 apic_reg_ops->apic_write(APIC_ERROR_STATUS, 0);
293 error1 = apic_reg_ops->apic_read(APIC_ERROR_STATUS);
294 error = error0 | error1;
295
296 /*
297 * Clear the APIC error status (do this on all cpus that enter here)
298 * (two writes are required due to the semantics of accessing the
299 * error status register.)
300 */
301 apic_reg_ops->apic_write(APIC_ERROR_STATUS, 0);
302 apic_reg_ops->apic_write(APIC_ERROR_STATUS, 0);
303
304 /*
305 * Prevent more than 1 CPU from handling error interrupt causing
306 * double printing (interleave of characters from multiple
307 * CPU's when using prom_printf)
308 */
309 if (lock_try(&apic_error_lock) == 0)
310 return (error ? DDI_INTR_CLAIMED : DDI_INTR_UNCLAIMED);
311 if (error) {
312 #if DEBUG
313 if (apic_debug)
314 debug_enter("pcplusmp: APIC Error interrupt received");
315 #endif /* DEBUG */
316 if (apic_panic_on_apic_error)
317 cmn_err(CE_PANIC,
318 "APIC Error interrupt on CPU %d. Status = %x",
319 psm_get_cpu_id(), error);
320 else {
321 if ((error & ~APIC_CS_ERRORS) == 0) {
322 /* cksum error only */
323 apic_error |= APIC_ERR_APIC_ERROR;
324 apic_apic_error |= error;
325 apic_num_apic_errors++;
326 apic_num_cksum_errors++;
327 } else {
328 /*
329 * prom_printf is the best shot we have of
330 * something which is problem free from
331 * high level/NMI type of interrupts
332 */
333 prom_printf("APIC Error interrupt on CPU %d. "
334 "Status 0 = %x, Status 1 = %x\n",
335 psm_get_cpu_id(), error0, error1);
336 apic_error |= APIC_ERR_APIC_ERROR;
337 apic_apic_error |= error;
338 apic_num_apic_errors++;
339 for (i = 0; i < apic_error_display_delay; i++) {
340 tenmicrosec();
341 }
342 /*
343 * provide more delay next time limited to
344 * roughly 1 clock tick time
345 */
346 if (apic_error_display_delay < 500)
347 apic_error_display_delay *= 2;
348 }
349 }
350 lock_clear(&apic_error_lock);
351 return (DDI_INTR_CLAIMED);
352 } else {
353 lock_clear(&apic_error_lock);
354 return (DDI_INTR_UNCLAIMED);
355 }
356 }
357
358 /*
359 * Turn off the mask bit in the performance counter Local Vector Table entry.
360 */
361 void
362 apic_cpcovf_mask_clear(void)
363 {
364 apic_reg_ops->apic_write(APIC_PCINT_VECT,
365 (apic_reg_ops->apic_read(APIC_PCINT_VECT) & ~APIC_LVT_MASK));
366 }
367
368 /*ARGSUSED*/
369 static int
370 apic_cmci_enable(xc_arg_t arg1, xc_arg_t arg2, xc_arg_t arg3)
371 {
372 apic_reg_ops->apic_write(APIC_CMCI_VECT, apic_cmci_vect);
373 return (0);
374 }
375
376 /*ARGSUSED*/
377 static int
378 apic_cmci_disable(xc_arg_t arg1, xc_arg_t arg2, xc_arg_t arg3)
379 {
380 apic_reg_ops->apic_write(APIC_CMCI_VECT, apic_cmci_vect | AV_MASK);
381 return (0);
382 }
383
384 /*ARGSUSED*/
385 int
386 cmci_cpu_setup(cpu_setup_t what, int cpuid, void *arg)
387 {
388 cpuset_t cpu_set;
389
390 CPUSET_ONLY(cpu_set, cpuid);
391
392 switch (what) {
393 case CPU_ON:
394 xc_call(NULL, NULL, NULL, CPUSET2BV(cpu_set),
395 (xc_func_t)apic_cmci_enable);
396 break;
397
398 case CPU_OFF:
399 xc_call(NULL, NULL, NULL, CPUSET2BV(cpu_set),
400 (xc_func_t)apic_cmci_disable);
401 break;
402
403 default:
404 break;
405 }
406
407 return (0);
408 }
409
410 static void
411 apic_disable_local_apic(void)
412 {
413 apic_reg_ops->apic_write_task_reg(APIC_MASK_ALL);
414 apic_reg_ops->apic_write(APIC_LOCAL_TIMER, AV_MASK);
415
416 /* local intr reg 0 */
417 apic_reg_ops->apic_write(APIC_INT_VECT0, AV_MASK);
418
419 /* disable NMI */
420 apic_reg_ops->apic_write(APIC_INT_VECT1, AV_MASK);
421
422 /* and error interrupt */
423 apic_reg_ops->apic_write(APIC_ERR_VECT, AV_MASK);
424
425 /* and perf counter intr */
426 apic_reg_ops->apic_write(APIC_PCINT_VECT, AV_MASK);
427
428 apic_reg_ops->apic_write(APIC_SPUR_INT_REG, APIC_SPUR_INTR);
429 }
430
431 static void
432 apic_cpu_send_SIPI(processorid_t cpun, boolean_t start)
433 {
434 int loop_count;
435 uint32_t vector;
436 uint_t apicid;
437 ulong_t iflag;
438
439 apicid = apic_cpus[cpun].aci_local_id;
440
441 /*
442 * Interrupts on current CPU will be disabled during the
443 * steps in order to avoid unwanted side effects from
444 * executing interrupt handlers on a problematic BIOS.
445 */
446 iflag = intr_clear();
447
448 if (start) {
449 outb(CMOS_ADDR, SSB);
450 outb(CMOS_DATA, BIOS_SHUTDOWN);
451 }
452
453 /*
454 * According to X2APIC specification in section '2.3.5.1' of
455 * Interrupt Command Register Semantics, the semantics of
456 * programming the Interrupt Command Register to dispatch an interrupt
457 * is simplified. A single MSR write to the 64-bit ICR is required
458 * for dispatching an interrupt. Specifically, with the 64-bit MSR
459 * interface to ICR, system software is not required to check the
460 * status of the delivery status bit prior to writing to the ICR
461 * to send an IPI. With the removal of the Delivery Status bit,
462 * system software no longer has a reason to read the ICR. It remains
463 * readable only to aid in debugging.
464 */
465 #ifdef DEBUG
466 APIC_AV_PENDING_SET();
467 #else
468 if (apic_mode == LOCAL_APIC) {
469 APIC_AV_PENDING_SET();
470 }
471 #endif /* DEBUG */
472
473 /* for integrated - make sure there is one INIT IPI in buffer */
474 /* for external - it will wake up the cpu */
475 apic_reg_ops->apic_write_int_cmd(apicid, AV_ASSERT | AV_RESET);
476
477 /* If only 1 CPU is installed, PENDING bit will not go low */
478 for (loop_count = apic_sipi_max_loop_count; loop_count; loop_count--) {
479 if (apic_mode == LOCAL_APIC &&
480 apic_reg_ops->apic_read(APIC_INT_CMD1) & AV_PENDING)
481 apic_ret();
482 else
483 break;
484 }
485
486 apic_reg_ops->apic_write_int_cmd(apicid, AV_DEASSERT | AV_RESET);
487 drv_usecwait(20000); /* 20 milli sec */
488
489 if (apic_cpus[cpun].aci_local_ver >= APIC_INTEGRATED_VERS) {
490 /* integrated apic */
491
492 vector = (rm_platter_pa >> MMU_PAGESHIFT) &
493 (APIC_VECTOR_MASK | APIC_IPL_MASK);
494
495 /* to offset the INIT IPI queue up in the buffer */
496 apic_reg_ops->apic_write_int_cmd(apicid, vector | AV_STARTUP);
497 drv_usecwait(200); /* 20 micro sec */
498
499 /*
500 * send the second SIPI (Startup IPI) as recommended by Intel
501 * software development manual.
502 */
503 apic_reg_ops->apic_write_int_cmd(apicid, vector | AV_STARTUP);
504 drv_usecwait(200); /* 20 micro sec */
505 }
506
507 intr_restore(iflag);
508 }
509
510 /*ARGSUSED1*/
511 int
512 apic_cpu_start(processorid_t cpun, caddr_t arg)
513 {
514 ASSERT(MUTEX_HELD(&cpu_lock));
515
516 if (!apic_cpu_in_range(cpun)) {
517 return (EINVAL);
518 }
519
520 /*
521 * Switch to apic_common_send_ipi for safety during starting other CPUs.
522 */
523 if (apic_mode == LOCAL_X2APIC) {
524 apic_switch_ipi_callback(B_TRUE);
525 }
526
527 apic_cmos_ssb_set = 1;
528 apic_cpu_send_SIPI(cpun, B_TRUE);
529
530 return (0);
531 }
532
533 /*
534 * Put CPU into halted state with interrupts disabled.
535 */
536 /*ARGSUSED1*/
537 int
538 apic_cpu_stop(processorid_t cpun, caddr_t arg)
539 {
540 int rc;
541 cpu_t *cp;
542 extern cpuset_t cpu_ready_set;
543 extern void cpu_idle_intercept_cpu(cpu_t *cp);
544
545 ASSERT(MUTEX_HELD(&cpu_lock));
546
547 if (!apic_cpu_in_range(cpun)) {
548 return (EINVAL);
549 }
550 if (apic_cpus[cpun].aci_local_ver < APIC_INTEGRATED_VERS) {
551 return (ENOTSUP);
552 }
553
554 cp = cpu_get(cpun);
555 ASSERT(cp != NULL);
556 ASSERT((cp->cpu_flags & CPU_OFFLINE) != 0);
557 ASSERT((cp->cpu_flags & CPU_QUIESCED) != 0);
558 ASSERT((cp->cpu_flags & CPU_ENABLE) == 0);
559
560 /* Clear CPU_READY flag to disable cross calls. */
561 cp->cpu_flags &= ~CPU_READY;
562 CPUSET_ATOMIC_DEL(cpu_ready_set, cpun);
563 rc = xc_flush_cpu(cp);
564 if (rc != 0) {
565 CPUSET_ATOMIC_ADD(cpu_ready_set, cpun);
566 cp->cpu_flags |= CPU_READY;
567 return (rc);
568 }
569
570 /* Intercept target CPU at a safe point before powering it off. */
571 cpu_idle_intercept_cpu(cp);
572
573 apic_cpu_send_SIPI(cpun, B_FALSE);
574 cp->cpu_flags &= ~CPU_RUNNING;
575
576 return (0);
577 }
578
579 int
580 apic_cpu_ops(psm_cpu_request_t *reqp)
581 {
582 if (reqp == NULL) {
583 return (EINVAL);
584 }
585
586 switch (reqp->pcr_cmd) {
587 case PSM_CPU_ADD:
588 return (apic_cpu_add(reqp));
589
590 case PSM_CPU_REMOVE:
591 return (apic_cpu_remove(reqp));
592
593 case PSM_CPU_STOP:
594 return (apic_cpu_stop(reqp->req.cpu_stop.cpuid,
595 reqp->req.cpu_stop.ctx));
596
597 default:
598 return (ENOTSUP);
599 }
600 }
601
602 #ifdef DEBUG
603 int apic_break_on_cpu = 9;
604 int apic_stretch_interrupts = 0;
605 int apic_stretch_ISR = 1 << 3; /* IPL of 3 matches nothing now */
606 #endif /* DEBUG */
607
608 /*
609 * generates an interprocessor interrupt to another CPU. Any changes made to
610 * this routine must be accompanied by similar changes to
611 * apic_common_send_ipi().
612 */
613 void
614 apic_send_ipi(int cpun, int ipl)
615 {
616 int vector;
617 ulong_t flag;
618
619 vector = apic_resv_vector[ipl];
620
621 ASSERT((vector >= APIC_BASE_VECT) && (vector <= APIC_SPUR_INTR));
622
623 flag = intr_clear();
624
625 APIC_AV_PENDING_SET();
626
627 apic_reg_ops->apic_write_int_cmd(apic_cpus[cpun].aci_local_id,
628 vector);
629
630 intr_restore(flag);
631 }
632
633
634 /*ARGSUSED*/
635 void
636 apic_set_idlecpu(processorid_t cpun)
637 {
638 }
639
640 /*ARGSUSED*/
641 void
642 apic_unset_idlecpu(processorid_t cpun)
643 {
644 }
645
646
647 void
648 apic_ret()
649 {
650 }
651
652 /*
653 * If apic_coarse_time == 1, then apic_gettime() is used instead of
654 * apic_gethrtime(). This is used for performance instead of accuracy.
655 */
656
657 hrtime_t
658 apic_gettime()
659 {
660 int old_hrtime_stamp;
661 hrtime_t temp;
662
663 /*
664 * In one-shot mode, we do not keep time, so if anyone
665 * calls psm_gettime() directly, we vector over to
666 * gethrtime().
667 * one-shot mode MUST NOT be enabled if this psm is the source of
668 * hrtime.
669 */
670
671 if (apic_oneshot)
672 return (gethrtime());
673
674
675 gettime_again:
676 while ((old_hrtime_stamp = apic_hrtime_stamp) & 1)
677 apic_ret();
678
679 temp = apic_nsec_since_boot;
680
681 if (apic_hrtime_stamp != old_hrtime_stamp) { /* got an interrupt */
682 goto gettime_again;
683 }
684 return (temp);
685 }
686
687 /*
688 * Here we return the number of nanoseconds since booting. Note every
689 * clock interrupt increments apic_nsec_since_boot by the appropriate
690 * amount.
691 */
692 hrtime_t
693 apic_gethrtime(void)
694 {
695 int curr_timeval, countval, elapsed_ticks;
696 int old_hrtime_stamp, status;
697 hrtime_t temp;
698 uint32_t cpun;
699 ulong_t oflags;
700
701 /*
702 * In one-shot mode, we do not keep time, so if anyone
703 * calls psm_gethrtime() directly, we vector over to
704 * gethrtime().
705 * one-shot mode MUST NOT be enabled if this psm is the source of
706 * hrtime.
707 */
708
709 if (apic_oneshot)
710 return (gethrtime());
711
712 oflags = intr_clear(); /* prevent migration */
713
714 cpun = apic_reg_ops->apic_read(APIC_LID_REG);
715 if (apic_mode == LOCAL_APIC)
716 cpun >>= APIC_ID_BIT_OFFSET;
717
718 lock_set(&apic_gethrtime_lock);
719
720 gethrtime_again:
721 while ((old_hrtime_stamp = apic_hrtime_stamp) & 1)
722 apic_ret();
723
724 /*
725 * Check to see which CPU we are on. Note the time is kept on
726 * the local APIC of CPU 0. If on CPU 0, simply read the current
727 * counter. If on another CPU, issue a remote read command to CPU 0.
728 */
729 if (cpun == apic_cpus[0].aci_local_id) {
730 countval = apic_reg_ops->apic_read(APIC_CURR_COUNT);
731 } else {
732 #ifdef DEBUG
733 APIC_AV_PENDING_SET();
734 #else
735 if (apic_mode == LOCAL_APIC)
736 APIC_AV_PENDING_SET();
737 #endif /* DEBUG */
738
739 apic_reg_ops->apic_write_int_cmd(
740 apic_cpus[0].aci_local_id, APIC_CURR_ADD | AV_REMOTE);
741
742 while ((status = apic_reg_ops->apic_read(APIC_INT_CMD1))
743 & AV_READ_PENDING) {
744 apic_ret();
745 }
746
747 if (status & AV_REMOTE_STATUS) /* 1 = valid */
748 countval = apic_reg_ops->apic_read(APIC_REMOTE_READ);
749 else { /* 0 = invalid */
750 apic_remote_hrterr++;
751 /*
752 * return last hrtime right now, will need more
753 * testing if change to retry
754 */
755 temp = apic_last_hrtime;
756
757 lock_clear(&apic_gethrtime_lock);
758
759 intr_restore(oflags);
760
761 return (temp);
762 }
763 }
764 if (countval > last_count_read)
765 countval = 0;
766 else
767 last_count_read = countval;
768
769 elapsed_ticks = apic_hertz_count - countval;
770
771 curr_timeval = APIC_TICKS_TO_NSECS(elapsed_ticks);
772 temp = apic_nsec_since_boot + curr_timeval;
773
774 if (apic_hrtime_stamp != old_hrtime_stamp) { /* got an interrupt */
775 /* we might have clobbered last_count_read. Restore it */
776 last_count_read = apic_hertz_count;
777 goto gethrtime_again;
778 }
779
780 if (temp < apic_last_hrtime) {
781 /* return last hrtime if error occurs */
782 apic_hrtime_error++;
783 temp = apic_last_hrtime;
784 }
785 else
786 apic_last_hrtime = temp;
787
788 lock_clear(&apic_gethrtime_lock);
789 intr_restore(oflags);
790
791 return (temp);
792 }
793
794 /* apic NMI handler */
795 /*ARGSUSED*/
796 void
797 apic_nmi_intr(caddr_t arg, struct regs *rp)
798 {
799 if (apic_shutdown_processors) {
800 apic_disable_local_apic();
801 return;
802 }
803
804 apic_error |= APIC_ERR_NMI;
805
806 if (!lock_try(&apic_nmi_lock))
807 return;
808 apic_num_nmis++;
809
810 if (apic_kmdb_on_nmi && psm_debugger()) {
811 debug_enter("NMI received: entering kmdb\n");
812 } else if (apic_panic_on_nmi) {
813 /* Keep panic from entering kmdb. */
814 nopanicdebug = 1;
815 panic("NMI received\n");
816 } else {
817 /*
818 * prom_printf is the best shot we have of something which is
819 * problem free from high level/NMI type of interrupts
820 */
821 prom_printf("NMI received\n");
822 }
823
824 lock_clear(&apic_nmi_lock);
825 }
826
827 processorid_t
828 apic_get_next_processorid(processorid_t cpu_id)
829 {
830
831 int i;
832
833 if (cpu_id == -1)
834 return ((processorid_t)0);
835
836 for (i = cpu_id + 1; i < NCPU; i++) {
837 if (apic_cpu_in_range(i))
838 return (i);
839 }
840
841 return ((processorid_t)-1);
842 }
843
844 int
845 apic_cpu_add(psm_cpu_request_t *reqp)
846 {
847 int i, rv = 0;
848 ulong_t iflag;
849 boolean_t first = B_TRUE;
850 uchar_t localver;
851 uint32_t localid, procid;
852 processorid_t cpuid = (processorid_t)-1;
853 mach_cpu_add_arg_t *ap;
854
855 ASSERT(reqp != NULL);
856 reqp->req.cpu_add.cpuid = (processorid_t)-1;
857
858 /* Check whether CPU hotplug is supported. */
859 if (!plat_dr_support_cpu() || apic_max_nproc == -1) {
860 return (ENOTSUP);
861 }
862
863 ap = (mach_cpu_add_arg_t *)reqp->req.cpu_add.argp;
864 switch (ap->type) {
865 case MACH_CPU_ARG_LOCAL_APIC:
866 localid = ap->arg.apic.apic_id;
867 procid = ap->arg.apic.proc_id;
868 if (localid >= 255 || procid > 255) {
869 cmn_err(CE_WARN,
870 "!apic: apicid(%u) or procid(%u) is invalid.",
871 localid, procid);
872 return (EINVAL);
873 }
874 break;
875
876 case MACH_CPU_ARG_LOCAL_X2APIC:
877 localid = ap->arg.apic.apic_id;
878 procid = ap->arg.apic.proc_id;
879 if (localid >= UINT32_MAX) {
880 cmn_err(CE_WARN,
881 "!apic: x2apicid(%u) is invalid.", localid);
882 return (EINVAL);
883 } else if (localid >= 255 && apic_mode == LOCAL_APIC) {
884 cmn_err(CE_WARN, "!apic: system is in APIC mode, "
885 "can't support x2APIC processor.");
886 return (ENOTSUP);
887 }
888 break;
889
890 default:
891 cmn_err(CE_WARN,
892 "!apic: unknown argument type %d to apic_cpu_add().",
893 ap->type);
894 return (EINVAL);
895 }
896
897 /* Use apic_ioapic_lock to sync with apic_get_next_bind_cpu. */
898 iflag = intr_clear();
899 lock_set(&apic_ioapic_lock);
900
901 /* Check whether local APIC id already exists. */
902 for (i = 0; i < apic_nproc; i++) {
903 if (!CPU_IN_SET(apic_cpumask, i))
904 continue;
905 if (apic_cpus[i].aci_local_id == localid) {
906 lock_clear(&apic_ioapic_lock);
907 intr_restore(iflag);
908 cmn_err(CE_WARN,
909 "!apic: local apic id %u already exists.",
910 localid);
911 return (EEXIST);
912 } else if (apic_cpus[i].aci_processor_id == procid) {
913 lock_clear(&apic_ioapic_lock);
914 intr_restore(iflag);
915 cmn_err(CE_WARN,
916 "!apic: processor id %u already exists.",
917 (int)procid);
918 return (EEXIST);
919 }
920
921 /*
922 * There's no local APIC version number available in MADT table,
923 * so assume that all CPUs are homogeneous and use local APIC
924 * version number of the first existing CPU.
925 */
926 if (first) {
927 first = B_FALSE;
928 localver = apic_cpus[i].aci_local_ver;
929 }
930 }
931 ASSERT(first == B_FALSE);
932
933 /*
934 * Try to assign the same cpuid if APIC id exists in the dirty cache.
935 */
936 for (i = 0; i < apic_max_nproc; i++) {
937 if (CPU_IN_SET(apic_cpumask, i)) {
938 ASSERT((apic_cpus[i].aci_status & APIC_CPU_FREE) == 0);
939 continue;
940 }
941 ASSERT(apic_cpus[i].aci_status & APIC_CPU_FREE);
942 if ((apic_cpus[i].aci_status & APIC_CPU_DIRTY) &&
943 apic_cpus[i].aci_local_id == localid &&
944 apic_cpus[i].aci_processor_id == procid) {
945 cpuid = i;
946 break;
947 }
948 }
949
950 /* Avoid the dirty cache and allocate fresh slot if possible. */
951 if (cpuid == (processorid_t)-1) {
952 for (i = 0; i < apic_max_nproc; i++) {
953 if ((apic_cpus[i].aci_status & APIC_CPU_FREE) &&
954 (apic_cpus[i].aci_status & APIC_CPU_DIRTY) == 0) {
955 cpuid = i;
956 break;
957 }
958 }
959 }
960
961 /* Try to find any free slot as last resort. */
962 if (cpuid == (processorid_t)-1) {
963 for (i = 0; i < apic_max_nproc; i++) {
964 if (apic_cpus[i].aci_status & APIC_CPU_FREE) {
965 cpuid = i;
966 break;
967 }
968 }
969 }
970
971 if (cpuid == (processorid_t)-1) {
972 lock_clear(&apic_ioapic_lock);
973 intr_restore(iflag);
974 cmn_err(CE_NOTE,
975 "!apic: failed to allocate cpu id for processor %u.",
976 procid);
977 rv = EAGAIN;
978 } else if (ACPI_FAILURE(acpica_map_cpu(cpuid, procid))) {
979 lock_clear(&apic_ioapic_lock);
980 intr_restore(iflag);
981 cmn_err(CE_NOTE,
982 "!apic: failed to build mapping for processor %u.",
983 procid);
984 rv = EBUSY;
985 } else {
986 ASSERT(cpuid >= 0 && cpuid < NCPU);
987 ASSERT(cpuid < apic_max_nproc && cpuid < max_ncpus);
988 bzero(&apic_cpus[cpuid], sizeof (apic_cpus[0]));
989 apic_cpus[cpuid].aci_processor_id = procid;
990 apic_cpus[cpuid].aci_local_id = localid;
991 apic_cpus[cpuid].aci_local_ver = localver;
992 CPUSET_ATOMIC_ADD(apic_cpumask, cpuid);
993 if (cpuid >= apic_nproc) {
994 apic_nproc = cpuid + 1;
995 }
996 lock_clear(&apic_ioapic_lock);
997 intr_restore(iflag);
998 reqp->req.cpu_add.cpuid = cpuid;
999 }
1000
1001 return (rv);
1002 }
1003
1004 int
1005 apic_cpu_remove(psm_cpu_request_t *reqp)
1006 {
1007 int i;
1008 ulong_t iflag;
1009 processorid_t cpuid;
1010
1011 /* Check whether CPU hotplug is supported. */
1012 if (!plat_dr_support_cpu() || apic_max_nproc == -1) {
1013 return (ENOTSUP);
1014 }
1015
1016 cpuid = reqp->req.cpu_remove.cpuid;
1017
1018 /* Use apic_ioapic_lock to sync with apic_get_next_bind_cpu. */
1019 iflag = intr_clear();
1020 lock_set(&apic_ioapic_lock);
1021
1022 if (!apic_cpu_in_range(cpuid)) {
1023 lock_clear(&apic_ioapic_lock);
1024 intr_restore(iflag);
1025 cmn_err(CE_WARN,
1026 "!apic: cpuid %d doesn't exist in apic_cpus array.",
1027 cpuid);
1028 return (ENODEV);
1029 }
1030 ASSERT((apic_cpus[cpuid].aci_status & APIC_CPU_FREE) == 0);
1031
1032 if (ACPI_FAILURE(acpica_unmap_cpu(cpuid))) {
1033 lock_clear(&apic_ioapic_lock);
1034 intr_restore(iflag);
1035 return (ENOENT);
1036 }
1037
1038 if (cpuid == apic_nproc - 1) {
1039 /*
1040 * We are removing the highest numbered cpuid so we need to
1041 * find the next highest cpuid as the new value for apic_nproc.
1042 */
1043 for (i = apic_nproc; i > 0; i--) {
1044 if (CPU_IN_SET(apic_cpumask, i - 1)) {
1045 apic_nproc = i;
1046 break;
1047 }
1048 }
1049 /* at least one CPU left */
1050 ASSERT(i > 0);
1051 }
1052 CPUSET_ATOMIC_DEL(apic_cpumask, cpuid);
1053 /* mark slot as free and keep it in the dirty cache */
1054 apic_cpus[cpuid].aci_status = APIC_CPU_FREE | APIC_CPU_DIRTY;
1055
1056 lock_clear(&apic_ioapic_lock);
1057 intr_restore(iflag);
1058
1059 return (0);
1060 }
1061
1062 /*
1063 * Return the number of APIC clock ticks elapsed for 8245 to decrement
1064 * (APIC_TIME_COUNT + pit_ticks_adj) ticks.
1065 */
1066 uint_t
1067 apic_calibrate(volatile uint32_t *addr, uint16_t *pit_ticks_adj)
1068 {
1069 uint8_t pit_tick_lo;
1070 uint16_t pit_tick, target_pit_tick;
1071 uint32_t start_apic_tick, end_apic_tick;
1072 ulong_t iflag;
1073 uint32_t reg;
1074
1075 reg = addr + APIC_CURR_COUNT - apicadr;
1076
1077 iflag = intr_clear();
1078
1079 do {
1080 pit_tick_lo = inb(PITCTR0_PORT);
1081 pit_tick = (inb(PITCTR0_PORT) << 8) | pit_tick_lo;
1082 } while (pit_tick < APIC_TIME_MIN ||
1083 pit_tick_lo <= APIC_LB_MIN || pit_tick_lo >= APIC_LB_MAX);
1084
1085 /*
1086 * Wait for the 8254 to decrement by 5 ticks to ensure
1087 * we didn't start in the middle of a tick.
1088 * Compare with 0x10 for the wrap around case.
1089 */
1090 target_pit_tick = pit_tick - 5;
1091 do {
1092 pit_tick_lo = inb(PITCTR0_PORT);
1093 pit_tick = (inb(PITCTR0_PORT) << 8) | pit_tick_lo;
1094 } while (pit_tick > target_pit_tick || pit_tick_lo < 0x10);
1095
1096 start_apic_tick = apic_reg_ops->apic_read(reg);
1097
1098 /*
1099 * Wait for the 8254 to decrement by
1100 * (APIC_TIME_COUNT + pit_ticks_adj) ticks
1101 */
1102 target_pit_tick = pit_tick - APIC_TIME_COUNT;
1103 do {
1104 pit_tick_lo = inb(PITCTR0_PORT);
1105 pit_tick = (inb(PITCTR0_PORT) << 8) | pit_tick_lo;
1106 } while (pit_tick > target_pit_tick || pit_tick_lo < 0x10);
1107
1108 end_apic_tick = apic_reg_ops->apic_read(reg);
1109
1110 *pit_ticks_adj = target_pit_tick - pit_tick;
1111
1112 intr_restore(iflag);
1113
1114 return (start_apic_tick - end_apic_tick);
1115 }
1116
1117 /*
1118 * Initialise the APIC timer on the local APIC of CPU 0 to the desired
1119 * frequency. Note at this stage in the boot sequence, the boot processor
1120 * is the only active processor.
1121 * hertz value of 0 indicates a one-shot mode request. In this case
1122 * the function returns the resolution (in nanoseconds) for the hardware
1123 * timer interrupt. If one-shot mode capability is not available,
1124 * the return value will be 0. apic_enable_oneshot is a global switch
1125 * for disabling the functionality.
1126 * A non-zero positive value for hertz indicates a periodic mode request.
1127 * In this case the hardware will be programmed to generate clock interrupts
1128 * at hertz frequency and returns the resolution of interrupts in
1129 * nanosecond.
1130 */
1131
1132 int
1133 apic_clkinit(int hertz)
1134 {
1135 int ret;
1136
1137 apic_int_busy_mark = (apic_int_busy_mark *
1138 apic_sample_factor_redistribution) / 100;
1139 apic_int_free_mark = (apic_int_free_mark *
1140 apic_sample_factor_redistribution) / 100;
1141 apic_diff_for_redistribution = (apic_diff_for_redistribution *
1142 apic_sample_factor_redistribution) / 100;
1143
1144 ret = apic_timer_init(hertz);
1145 return (ret);
1146
1147 }
1148
1149 /*
1150 * apic_preshutdown:
1151 * Called early in shutdown whilst we can still access filesystems to do
1152 * things like loading modules which will be required to complete shutdown
1153 * after filesystems are all unmounted.
1154 */
1155 void
1156 apic_preshutdown(int cmd, int fcn)
1157 {
1158 APIC_VERBOSE_POWEROFF(("apic_preshutdown(%d,%d); m=%d a=%d\n",
1159 cmd, fcn, apic_poweroff_method, apic_enable_acpi));
1160 }
1161
1162 void
1163 apic_shutdown(int cmd, int fcn)
1164 {
1165 int restarts, attempts;
1166 int i;
1167 uchar_t byte;
1168 ulong_t iflag;
1169
1170 hpet_acpi_fini();
1171
1172 /* Send NMI to all CPUs except self to do per processor shutdown */
1173 iflag = intr_clear();
1174 #ifdef DEBUG
1175 APIC_AV_PENDING_SET();
1176 #else
1177 if (apic_mode == LOCAL_APIC)
1178 APIC_AV_PENDING_SET();
1179 #endif /* DEBUG */
1180 apic_shutdown_processors = 1;
1181 apic_reg_ops->apic_write(APIC_INT_CMD1,
1182 AV_NMI | AV_LEVEL | AV_SH_ALL_EXCSELF);
1183
1184 /* restore cmos shutdown byte before reboot */
1185 if (apic_cmos_ssb_set) {
1186 outb(CMOS_ADDR, SSB);
1187 outb(CMOS_DATA, 0);
1188 }
1189
1190 ioapic_disable_redirection();
1191
1192 /* disable apic mode if imcr present */
1193 if (apic_imcrp) {
1194 outb(APIC_IMCR_P1, (uchar_t)APIC_IMCR_SELECT);
1195 outb(APIC_IMCR_P2, (uchar_t)APIC_IMCR_PIC);
1196 }
1197
1198 apic_disable_local_apic();
1199
1200 intr_restore(iflag);
1201
1202 /* remainder of function is for shutdown cases only */
1203 if (cmd != A_SHUTDOWN)
1204 return;
1205
1206 /*
1207 * Switch system back into Legacy-Mode if using ACPI and
1208 * not powering-off. Some BIOSes need to remain in ACPI-mode
1209 * for power-off to succeed (Dell Dimension 4600)
1210 * Do not disable ACPI while doing fastreboot
1211 */
1212 if (apic_enable_acpi && fcn != AD_POWEROFF && fcn != AD_FASTREBOOT)
1213 (void) AcpiDisable();
1214
1215 if (fcn == AD_FASTREBOOT) {
1216 apic_reg_ops->apic_write(APIC_INT_CMD1,
1217 AV_ASSERT | AV_RESET | AV_SH_ALL_EXCSELF);
1218 }
1219
1220 /* remainder of function is for shutdown+poweroff case only */
1221 if (fcn != AD_POWEROFF)
1222 return;
1223
1224 switch (apic_poweroff_method) {
1225 case APIC_POWEROFF_VIA_RTC:
1226
1227 /* select the extended NVRAM bank in the RTC */
1228 outb(CMOS_ADDR, RTC_REGA);
1229 byte = inb(CMOS_DATA);
1230 outb(CMOS_DATA, (byte | EXT_BANK));
1231
1232 outb(CMOS_ADDR, PFR_REG);
1233
1234 /* for Predator must toggle the PAB bit */
1235 byte = inb(CMOS_DATA);
1236
1237 /*
1238 * clear power active bar, wakeup alarm and
1239 * kickstart
1240 */
1241 byte &= ~(PAB_CBIT | WF_FLAG | KS_FLAG);
1242 outb(CMOS_DATA, byte);
1243
1244 /* delay before next write */
1245 drv_usecwait(1000);
1246
1247 /* for S40 the following would suffice */
1248 byte = inb(CMOS_DATA);
1249
1250 /* power active bar control bit */
1251 byte |= PAB_CBIT;
1252 outb(CMOS_DATA, byte);
1253
1254 break;
1255
1256 case APIC_POWEROFF_VIA_ASPEN_BMC:
1257 restarts = 0;
1258 restart_aspen_bmc:
1259 if (++restarts == 3)
1260 break;
1261 attempts = 0;
1262 do {
1263 byte = inb(MISMIC_FLAG_REGISTER);
1264 byte &= MISMIC_BUSY_MASK;
1265 if (byte != 0) {
1266 drv_usecwait(1000);
1267 if (attempts >= 3)
1268 goto restart_aspen_bmc;
1269 ++attempts;
1270 }
1271 } while (byte != 0);
1272 outb(MISMIC_CNTL_REGISTER, CC_SMS_GET_STATUS);
1273 byte = inb(MISMIC_FLAG_REGISTER);
1274 byte |= 0x1;
1275 outb(MISMIC_FLAG_REGISTER, byte);
1276 i = 0;
1277 for (; i < (sizeof (aspen_bmc)/sizeof (aspen_bmc[0]));
1278 i++) {
1279 attempts = 0;
1280 do {
1281 byte = inb(MISMIC_FLAG_REGISTER);
1282 byte &= MISMIC_BUSY_MASK;
1283 if (byte != 0) {
1284 drv_usecwait(1000);
1285 if (attempts >= 3)
1286 goto restart_aspen_bmc;
1287 ++attempts;
1288 }
1289 } while (byte != 0);
1290 outb(MISMIC_CNTL_REGISTER, aspen_bmc[i].cntl);
1291 outb(MISMIC_DATA_REGISTER, aspen_bmc[i].data);
1292 byte = inb(MISMIC_FLAG_REGISTER);
1293 byte |= 0x1;
1294 outb(MISMIC_FLAG_REGISTER, byte);
1295 }
1296 break;
1297
1298 case APIC_POWEROFF_VIA_SITKA_BMC:
1299 restarts = 0;
1300 restart_sitka_bmc:
1301 if (++restarts == 3)
1302 break;
1303 attempts = 0;
1304 do {
1305 byte = inb(SMS_STATUS_REGISTER);
1306 byte &= SMS_STATE_MASK;
1307 if ((byte == SMS_READ_STATE) ||
1308 (byte == SMS_WRITE_STATE)) {
1309 drv_usecwait(1000);
1310 if (attempts >= 3)
1311 goto restart_sitka_bmc;
1312 ++attempts;
1313 }
1314 } while ((byte == SMS_READ_STATE) ||
1315 (byte == SMS_WRITE_STATE));
1316 outb(SMS_COMMAND_REGISTER, SMS_GET_STATUS);
1317 i = 0;
1318 for (; i < (sizeof (sitka_bmc)/sizeof (sitka_bmc[0]));
1319 i++) {
1320 attempts = 0;
1321 do {
1322 byte = inb(SMS_STATUS_REGISTER);
1323 byte &= SMS_IBF_MASK;
1324 if (byte != 0) {
1325 drv_usecwait(1000);
1326 if (attempts >= 3)
1327 goto restart_sitka_bmc;
1328 ++attempts;
1329 }
1330 } while (byte != 0);
1331 outb(sitka_bmc[i].port, sitka_bmc[i].data);
1332 }
1333 break;
1334
1335 case APIC_POWEROFF_NONE:
1336
1337 /* If no APIC direct method, we will try using ACPI */
1338 if (apic_enable_acpi) {
1339 if (acpi_poweroff() == 1)
1340 return;
1341 } else
1342 return;
1343
1344 break;
1345 }
1346 /*
1347 * Wait a limited time here for power to go off.
1348 * If the power does not go off, then there was a
1349 * problem and we should continue to the halt which
1350 * prints a message for the user to press a key to
1351 * reboot.
1352 */
1353 drv_usecwait(7000000); /* wait seven seconds */
1354
1355 }
1356
1357 cyclic_id_t apic_cyclic_id;
1358
1359 /*
1360 * The following functions are in the platform specific file so that they
1361 * can be different functions depending on whether we are running on
1362 * bare metal or a hypervisor.
1363 */
1364
1365 /*
1366 * map an apic for memory-mapped access
1367 */
1368 uint32_t *
1369 mapin_apic(uint32_t addr, size_t len, int flags)
1370 {
1371 return ((void *)psm_map_phys(addr, len, flags));
1372 }
1373
1374 uint32_t *
1375 mapin_ioapic(uint32_t addr, size_t len, int flags)
1376 {
1377 return (mapin_apic(addr, len, flags));
1378 }
1379
1380 /*
1381 * unmap an apic
1382 */
1383 void
1384 mapout_apic(caddr_t addr, size_t len)
1385 {
1386 psm_unmap_phys(addr, len);
1387 }
1388
1389 void
1390 mapout_ioapic(caddr_t addr, size_t len)
1391 {
1392 mapout_apic(addr, len);
1393 }
1394
1395 uint32_t
1396 ioapic_read(int ioapic_ix, uint32_t reg)
1397 {
1398 volatile uint32_t *ioapic;
1399
1400 ioapic = apicioadr[ioapic_ix];
1401 ioapic[APIC_IO_REG] = reg;
1402 return (ioapic[APIC_IO_DATA]);
1403 }
1404
1405 void
1406 ioapic_write(int ioapic_ix, uint32_t reg, uint32_t value)
1407 {
1408 volatile uint32_t *ioapic;
1409
1410 ioapic = apicioadr[ioapic_ix];
1411 ioapic[APIC_IO_REG] = reg;
1412 ioapic[APIC_IO_DATA] = value;
1413 }
1414
1415 void
1416 ioapic_write_eoi(int ioapic_ix, uint32_t value)
1417 {
1418 volatile uint32_t *ioapic;
1419
1420 ioapic = apicioadr[ioapic_ix];
1421 ioapic[APIC_IO_EOI] = value;
1422 }
1423
1424 /*
1425 * Round-robin algorithm to find the next CPU with interrupts enabled.
1426 * It can't share the same static variable apic_next_bind_cpu with
1427 * apic_get_next_bind_cpu(), since that will cause all interrupts to be
1428 * bound to CPU1 at boot time. During boot, only CPU0 is online with
1429 * interrupts enabled when apic_get_next_bind_cpu() and apic_find_cpu()
1430 * are called. However, the pcplusmp driver assumes that there will be
1431 * boot_ncpus CPUs configured eventually so it tries to distribute all
1432 * interrupts among CPU0 - CPU[boot_ncpus - 1]. Thus to prevent all
1433 * interrupts being targetted at CPU1, we need to use a dedicated static
1434 * variable for find_next_cpu() instead of sharing apic_next_bind_cpu.
1435 */
1436
1437 processorid_t
1438 apic_find_cpu(int flag)
1439 {
1440 int i;
1441 static processorid_t acid = 0;
1442
1443 /* Find the first CPU with the passed-in flag set */
1444 for (i = 0; i < apic_nproc; i++) {
1445 if (++acid >= apic_nproc) {
1446 acid = 0;
1447 }
1448 if (apic_cpu_in_range(acid) &&
1449 (apic_cpus[acid].aci_status & flag)) {
1450 break;
1451 }
1452 }
1453
1454 ASSERT((apic_cpus[acid].aci_status & flag) != 0);
1455 return (acid);
1456 }
1457
1458 /*
1459 * Switch between safe and x2APIC IPI sending method.
1460 * CPU may power on in xapic mode or x2apic mode. If CPU needs to send IPI to
1461 * other CPUs before entering x2APIC mode, it still needs to xAPIC method.
1462 * Before sending StartIPI to target CPU, psm_send_ipi will be changed to
1463 * apic_common_send_ipi, which detects current local APIC mode and use right
1464 * method to send IPI. If some CPUs fail to start up, apic_poweron_cnt
1465 * won't return to zero, so apic_common_send_ipi will always be used.
1466 * psm_send_ipi can't be simply changed back to x2apic_send_ipi if some CPUs
1467 * failed to start up because those failed CPUs may recover itself later at
1468 * unpredictable time.
1469 */
1470 void
1471 apic_switch_ipi_callback(boolean_t enter)
1472 {
1473 ulong_t iflag;
1474 struct psm_ops *pops = psmops;
1475
1476 iflag = intr_clear();
1477 lock_set(&apic_mode_switch_lock);
1478 if (enter) {
1479 ASSERT(apic_poweron_cnt >= 0);
1480 if (apic_poweron_cnt == 0) {
1481 pops->psm_send_ipi = apic_common_send_ipi;
1482 send_dirintf = pops->psm_send_ipi;
1483 }
1484 apic_poweron_cnt++;
1485 } else {
1486 ASSERT(apic_poweron_cnt > 0);
1487 apic_poweron_cnt--;
1488 if (apic_poweron_cnt == 0) {
1489 pops->psm_send_ipi = x2apic_send_ipi;
1490 send_dirintf = pops->psm_send_ipi;
1491 }
1492 }
1493 lock_clear(&apic_mode_switch_lock);
1494 intr_restore(iflag);
1495 }
1496
1497 void
1498 apic_intrmap_init(int apic_mode)
1499 {
1500 int suppress_brdcst_eoi = 0;
1501
1502 /*
1503 * Intel Software Developer's Manual 3A, 10.12.7:
1504 *
1505 * Routing of device interrupts to local APIC units operating in
1506 * x2APIC mode requires use of the interrupt-remapping architecture
1507 * specified in the Intel Virtualization Technology for Directed
1508 * I/O, Revision 1.3. Because of this, BIOS must enumerate support
1509 * for and software must enable this interrupt remapping with
1510 * Extended Interrupt Mode Enabled before it enabling x2APIC mode in
1511 * the local APIC units.
1512 *
1513 *
1514 * In other words, to use the APIC in x2APIC mode, we need interrupt
1515 * remapping. Since we don't start up the IOMMU by default, we
1516 * won't be able to do any interrupt remapping and therefore have to
1517 * use the APIC in traditional 'local APIC' mode with memory mapped
1518 * I/O.
1519 */
1520
1521 if (psm_vt_ops != NULL) {
1522 if (((apic_intrmap_ops_t *)psm_vt_ops)->
1523 apic_intrmap_init(apic_mode) == DDI_SUCCESS) {
1524
1525 apic_vt_ops = psm_vt_ops;
1526
1527 /*
1528 * We leverage the interrupt remapping engine to
1529 * suppress broadcast EOI; thus we must send the
1530 * directed EOI with the directed-EOI handler.
1531 */
1532 if (apic_directed_EOI_supported() == 0) {
1533 suppress_brdcst_eoi = 1;
1534 }
1535
1536 apic_vt_ops->apic_intrmap_enable(suppress_brdcst_eoi);
1537
1538 if (apic_detect_x2apic()) {
1539 apic_enable_x2apic();
1540 }
1541
1542 if (apic_directed_EOI_supported() == 0) {
1543 apic_set_directed_EOI_handler();
1544 }
1545 }
1546 }
1547 }
1548
1549 /*ARGSUSED*/
1550 static void
1551 apic_record_ioapic_rdt(void *intrmap_private, ioapic_rdt_t *irdt)
1552 {
1553 irdt->ir_hi <<= APIC_ID_BIT_OFFSET;
1554 }
1555
1556 /*ARGSUSED*/
1557 static void
1558 apic_record_msi(void *intrmap_private, msi_regs_t *mregs)
1559 {
1560 mregs->mr_addr = MSI_ADDR_HDR |
1561 (MSI_ADDR_RH_FIXED << MSI_ADDR_RH_SHIFT) |
1562 (MSI_ADDR_DM_PHYSICAL << MSI_ADDR_DM_SHIFT) |
1563 (mregs->mr_addr << MSI_ADDR_DEST_SHIFT);
1564 mregs->mr_data = (MSI_DATA_TM_EDGE << MSI_DATA_TM_SHIFT) |
1565 mregs->mr_data;
1566 }
1567
1568 /*
1569 * Functions from apic_introp.c
1570 *
1571 * Those functions are used by apic_intr_ops().
1572 */
1573
1574 /*
1575 * MSI support flag:
1576 * reflects whether MSI is supported at APIC level
1577 * it can also be patched through /etc/system
1578 *
1579 * 0 = default value - don't know and need to call apic_check_msi_support()
1580 * to find out then set it accordingly
1581 * 1 = supported
1582 * -1 = not supported
1583 */
1584 int apic_support_msi = 0;
1585
1586 /* Multiple vector support for MSI-X */
1587 int apic_msix_enable = 1;
1588
1589 /* Multiple vector support for MSI */
1590 int apic_multi_msi_enable = 1;
1591
1592 /*
1593 * check whether the system supports MSI
1594 *
1595 * If PCI-E capability is found, then this must be a PCI-E system.
1596 * Since MSI is required for PCI-E system, it returns PSM_SUCCESS
1597 * to indicate this system supports MSI.
1598 */
1599 int
1600 apic_check_msi_support()
1601 {
1602 dev_info_t *cdip;
1603 char dev_type[16];
1604 int dev_len;
1605
1606 DDI_INTR_IMPLDBG((CE_CONT, "apic_check_msi_support:\n"));
1607
1608 /*
1609 * check whether the first level children of root_node have
1610 * PCI-E capability
1611 */
1612 for (cdip = ddi_get_child(ddi_root_node()); cdip != NULL;
1613 cdip = ddi_get_next_sibling(cdip)) {
1614
1615 DDI_INTR_IMPLDBG((CE_CONT, "apic_check_msi_support: cdip: 0x%p,"
1616 " driver: %s, binding: %s, nodename: %s\n", (void *)cdip,
1617 ddi_driver_name(cdip), ddi_binding_name(cdip),
1618 ddi_node_name(cdip)));
1619 dev_len = sizeof (dev_type);
1620 if (ddi_getlongprop_buf(DDI_DEV_T_ANY, cdip, DDI_PROP_DONTPASS,
1621 "device_type", (caddr_t)dev_type, &dev_len)
1622 != DDI_PROP_SUCCESS)
1623 continue;
1624 if (strcmp(dev_type, "pciex") == 0)
1625 return (PSM_SUCCESS);
1626 }
1627
1628 /* MSI is not supported on this system */
1629 DDI_INTR_IMPLDBG((CE_CONT, "apic_check_msi_support: no 'pciex' "
1630 "device_type found\n"));
1631 return (PSM_FAILURE);
1632 }
1633
1634 /*
1635 * apic_pci_msi_unconfigure:
1636 *
1637 * This and next two interfaces are copied from pci_intr_lib.c
1638 * Do ensure that these two files stay in sync.
1639 * These needed to be copied over here to avoid a deadlock situation on
1640 * certain mp systems that use MSI interrupts.
1641 *
1642 * IMPORTANT regards next three interfaces:
1643 * i) are called only for MSI/X interrupts.
1644 * ii) called with interrupts disabled, and must not block
1645 */
1646 void
1647 apic_pci_msi_unconfigure(dev_info_t *rdip, int type, int inum)
1648 {
1649 ushort_t msi_ctrl;
1650 int cap_ptr = i_ddi_get_msi_msix_cap_ptr(rdip);
1651 ddi_acc_handle_t handle = i_ddi_get_pci_config_handle(rdip);
1652
1653 ASSERT((handle != NULL) && (cap_ptr != 0));
1654
1655 if (type == DDI_INTR_TYPE_MSI) {
1656 msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);
1657 msi_ctrl &= (~PCI_MSI_MME_MASK);
1658 pci_config_put16(handle, cap_ptr + PCI_MSI_CTRL, msi_ctrl);
1659 pci_config_put32(handle, cap_ptr + PCI_MSI_ADDR_OFFSET, 0);
1660
1661 if (msi_ctrl & PCI_MSI_64BIT_MASK) {
1662 pci_config_put16(handle,
1663 cap_ptr + PCI_MSI_64BIT_DATA, 0);
1664 pci_config_put32(handle,
1665 cap_ptr + PCI_MSI_ADDR_OFFSET + 4, 0);
1666 } else {
1667 pci_config_put16(handle,
1668 cap_ptr + PCI_MSI_32BIT_DATA, 0);
1669 }
1670
1671 } else if (type == DDI_INTR_TYPE_MSIX) {
1672 uintptr_t off;
1673 uint32_t mask;
1674 ddi_intr_msix_t *msix_p = i_ddi_get_msix(rdip);
1675
1676 ASSERT(msix_p != NULL);
1677
1678 /* Offset into "inum"th entry in the MSI-X table & mask it */
1679 off = (uintptr_t)msix_p->msix_tbl_addr + (inum *
1680 PCI_MSIX_VECTOR_SIZE) + PCI_MSIX_VECTOR_CTRL_OFFSET;
1681
1682 mask = ddi_get32(msix_p->msix_tbl_hdl, (uint32_t *)off);
1683
1684 ddi_put32(msix_p->msix_tbl_hdl, (uint32_t *)off, (mask | 1));
1685
1686 /* Offset into the "inum"th entry in the MSI-X table */
1687 off = (uintptr_t)msix_p->msix_tbl_addr +
1688 (inum * PCI_MSIX_VECTOR_SIZE);
1689
1690 /* Reset the "data" and "addr" bits */
1691 ddi_put32(msix_p->msix_tbl_hdl,
1692 (uint32_t *)(off + PCI_MSIX_DATA_OFFSET), 0);
1693 ddi_put64(msix_p->msix_tbl_hdl, (uint64_t *)off, 0);
1694 }
1695 }
1696
1697 /*
1698 * apic_pci_msi_disable_mode:
1699 */
1700 void
1701 apic_pci_msi_disable_mode(dev_info_t *rdip, int type)
1702 {
1703 ushort_t msi_ctrl;
1704 int cap_ptr = i_ddi_get_msi_msix_cap_ptr(rdip);
1705 ddi_acc_handle_t handle = i_ddi_get_pci_config_handle(rdip);
1706
1707 ASSERT((handle != NULL) && (cap_ptr != 0));
1708
1709 if (type == DDI_INTR_TYPE_MSI) {
1710 msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSI_CTRL);
1711 if (!(msi_ctrl & PCI_MSI_ENABLE_BIT))
1712 return;
1713
1714 msi_ctrl &= ~PCI_MSI_ENABLE_BIT; /* MSI disable */
1715 pci_config_put16(handle, cap_ptr + PCI_MSI_CTRL, msi_ctrl);
1716
1717 } else if (type == DDI_INTR_TYPE_MSIX) {
1718 msi_ctrl = pci_config_get16(handle, cap_ptr + PCI_MSIX_CTRL);
1719 if (msi_ctrl & PCI_MSIX_ENABLE_BIT) {
1720 msi_ctrl &= ~PCI_MSIX_ENABLE_BIT;
1721 pci_config_put16(handle, cap_ptr + PCI_MSIX_CTRL,
1722 msi_ctrl);
1723 }
1724 }
1725 }
1726
1727 uint32_t
1728 apic_get_localapicid(uint32_t cpuid)
1729 {
1730 ASSERT(cpuid < apic_nproc && apic_cpus != NULL);
1731
1732 return (apic_cpus[cpuid].aci_local_id);
1733 }
1734
1735 uchar_t
1736 apic_get_ioapicid(uchar_t ioapicindex)
1737 {
1738 ASSERT(ioapicindex < MAX_IO_APIC);
1739
1740 return (apic_io_id[ioapicindex]);
1741 }