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[FreeBSD/FreeBSD.git] / sys / x86 / acpica / acpi_wakeup.c
1 /*-
2  * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
3  * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4  * Copyright (c) 2003 Peter Wemm
5  * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #if defined(__amd64__)
34 #define DEV_APIC
35 #else
36 #include "opt_apic.h"
37 #endif
38
39 #include <sys/param.h>
40 #include <sys/bus.h>
41 #include <sys/eventhandler.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/memrange.h>
45 #include <sys/smp.h>
46 #include <sys/systm.h>
47
48 #include <vm/vm.h>
49 #include <vm/pmap.h>
50
51 #include <machine/clock.h>
52 #include <machine/cpu.h>
53 #include <machine/intr_machdep.h>
54 #include <x86/mca.h>
55 #include <machine/pcb.h>
56 #include <machine/specialreg.h>
57 #include <machine/md_var.h>
58
59 #ifdef DEV_APIC
60 #include <x86/apicreg.h>
61 #include <x86/apicvar.h>
62 #endif
63 #ifdef SMP
64 #include <machine/smp.h>
65 #include <machine/vmparam.h>
66 #endif
67
68 #include <contrib/dev/acpica/include/acpi.h>
69
70 #include <dev/acpica/acpivar.h>
71
72 #include "acpi_wakecode.h"
73 #include "acpi_wakedata.h"
74
75 /* Make sure the code is less than a page and leave room for the stack. */
76 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
77
78 extern int              acpi_resume_beep;
79 extern int              acpi_reset_video;
80
81 #ifdef SMP
82 extern struct susppcb   **susppcbs;
83 static cpuset_t         suspcpus;
84 #else
85 static struct susppcb   **susppcbs;
86 #endif
87
88 static void             *acpi_alloc_wakeup_handler(void **);
89 static void             acpi_stop_beep(void *);
90
91 #ifdef SMP
92 static int              acpi_wakeup_ap(struct acpi_softc *, int);
93 static void             acpi_wakeup_cpus(struct acpi_softc *);
94 #endif
95
96 #ifdef __amd64__
97 #define ACPI_WAKEPAGES  4
98 #else
99 #define ACPI_WAKEPAGES  1
100 #endif
101
102 #define WAKECODE_FIXUP(offset, type, val)       do {    \
103         type    *addr;                                  \
104         addr = (type *)(sc->acpi_wakeaddr + (offset));  \
105         *addr = val;                                    \
106 } while (0)
107
108 static void
109 acpi_stop_beep(void *arg)
110 {
111
112         if (acpi_resume_beep != 0)
113                 timer_spkr_release();
114 }
115
116 #ifdef SMP
117 static int
118 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
119 {
120         struct pcb *pcb;
121         int             vector = (sc->acpi_wakephys >> 12) & 0xff;
122         int             apic_id = cpu_apic_ids[cpu];
123         int             ms;
124
125         pcb = &susppcbs[cpu]->sp_pcb;
126         WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
127         WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
128         WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
129
130         ipi_startup(apic_id, vector);
131
132         /* Wait up to 5 seconds for it to resume. */
133         for (ms = 0; ms < 5000; ms++) {
134                 if (!CPU_ISSET(cpu, &suspended_cpus))
135                         return (1);     /* return SUCCESS */
136                 DELAY(1000);
137         }
138         return (0);             /* return FAILURE */
139 }
140
141 #define WARMBOOT_TARGET         0
142 #define WARMBOOT_OFF            (KERNBASE + 0x0467)
143 #define WARMBOOT_SEG            (KERNBASE + 0x0469)
144
145 #define CMOS_REG                (0x70)
146 #define CMOS_DATA               (0x71)
147 #define BIOS_RESET              (0x0f)
148 #define BIOS_WARM               (0x0a)
149
150 static void
151 acpi_wakeup_cpus(struct acpi_softc *sc)
152 {
153         uint32_t        mpbioswarmvec;
154         int             cpu;
155         u_char          mpbiosreason;
156
157         /* save the current value of the warm-start vector */
158         mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
159         outb(CMOS_REG, BIOS_RESET);
160         mpbiosreason = inb(CMOS_DATA);
161
162         /* setup a vector to our boot code */
163         *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
164         *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4;
165         outb(CMOS_REG, BIOS_RESET);
166         outb(CMOS_DATA, BIOS_WARM);     /* 'warm-start' */
167
168         /* Wake up each AP. */
169         for (cpu = 1; cpu < mp_ncpus; cpu++) {
170                 if (!CPU_ISSET(cpu, &suspcpus))
171                         continue;
172                 if (acpi_wakeup_ap(sc, cpu) == 0) {
173                         /* restore the warmstart vector */
174                         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
175                         panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
176                             cpu, cpu_apic_ids[cpu]);
177                 }
178         }
179
180         /* restore the warmstart vector */
181         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
182
183         outb(CMOS_REG, BIOS_RESET);
184         outb(CMOS_DATA, mpbiosreason);
185 }
186 #endif
187
188 int
189 acpi_sleep_machdep(struct acpi_softc *sc, int state)
190 {
191         ACPI_STATUS     status;
192         struct pcb      *pcb;
193
194         if (sc->acpi_wakeaddr == 0ul)
195                 return (-1);    /* couldn't alloc wake memory */
196
197 #ifdef SMP
198         suspcpus = all_cpus;
199         CPU_CLR(PCPU_GET(cpuid), &suspcpus);
200 #endif
201
202         if (acpi_resume_beep != 0)
203                 timer_spkr_acquire();
204
205         AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0);
206
207         intr_suspend();
208
209         pcb = &susppcbs[0]->sp_pcb;
210         if (savectx(pcb)) {
211 #ifdef __amd64__
212                 fpususpend(susppcbs[0]->sp_fpususpend);
213 #else
214                 npxsuspend(susppcbs[0]->sp_fpususpend);
215 #endif
216 #ifdef SMP
217                 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
218                         device_printf(sc->acpi_dev, "Failed to suspend APs\n");
219                         return (0);     /* couldn't sleep */
220                 }
221 #endif
222
223                 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
224                 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
225
226 #ifndef __amd64__
227                 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4);
228 #endif
229                 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
230                 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
231                 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
232
233                 /* Call ACPICA to enter the desired sleep state */
234                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
235                         status = AcpiEnterSleepStateS4bios();
236                 else
237                         status = AcpiEnterSleepState(state);
238                 if (ACPI_FAILURE(status)) {
239                         device_printf(sc->acpi_dev,
240                             "AcpiEnterSleepState failed - %s\n",
241                             AcpiFormatException(status));
242                         return (0);     /* couldn't sleep */
243                 }
244
245                 for (;;)
246                         ia32_pause();
247         } else {
248 #ifdef __amd64__
249                 fpuresume(susppcbs[0]->sp_fpususpend);
250 #else
251                 npxresume(susppcbs[0]->sp_fpususpend);
252 #endif
253         }
254
255         return (1);     /* wakeup successfully */
256 }
257
258 int
259 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
260     int intr_enabled)
261 {
262
263         if (sleep_result == -1)
264                 return (sleep_result);
265
266         if (!intr_enabled) {
267                 /* Wakeup MD procedures in interrupt disabled context */
268                 if (sleep_result == 1) {
269                         pmap_init_pat();
270                         initializecpu();
271                         PCPU_SET(switchtime, 0);
272                         PCPU_SET(switchticks, ticks);
273 #ifdef DEV_APIC
274                         lapic_xapic_mode();
275 #endif
276 #ifdef SMP
277                         if (!CPU_EMPTY(&suspcpus))
278                                 acpi_wakeup_cpus(sc);
279 #endif
280                 }
281
282 #ifdef SMP
283                 if (!CPU_EMPTY(&suspcpus))
284                         restart_cpus(suspcpus);
285 #endif
286                 mca_resume();
287 #ifdef __amd64__
288                 if (vmm_resume_p != NULL)
289                         vmm_resume_p();
290 #endif
291                 intr_resume(/*suspend_cancelled*/false);
292
293                 AcpiSetFirmwareWakingVector(0, 0);
294         } else {
295                 /* Wakeup MD procedures in interrupt enabled context */
296                 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
297                     mem_range_softc.mr_op->reinit != NULL)
298                         mem_range_softc.mr_op->reinit(&mem_range_softc);
299         }
300
301         return (sleep_result);
302 }
303
304 static void *
305 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES])
306 {
307         int             i;
308
309         memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages));
310
311         /*
312          * Specify the region for our wakeup code.  We want it in the low 1 MB
313          * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
314          * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
315          * and ROM area (0xa0000 and above).  The temporary page tables must be
316          * page-aligned.
317          */
318         for (i = 0; i < ACPI_WAKEPAGES; i++) {
319                 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT,
320                     0x500, 0xa0000, PAGE_SIZE, 0ul);
321                 if (wakepages[i] == NULL) {
322                         printf("%s: can't alloc wake memory\n", __func__);
323                         goto freepages;
324                 }
325         }
326         if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
327             EVENTHANDLER_PRI_LAST) == NULL) {
328                 printf("%s: can't register event handler\n", __func__);
329                 goto freepages;
330         }
331         susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
332         for (i = 0; i < mp_ncpus; i++) {
333                 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
334                 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK);
335         }
336
337         return (wakepages);
338
339 freepages:
340         for (i = 0; i < ACPI_WAKEPAGES; i++)
341                 if (wakepages[i] != NULL)
342                         contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF);
343         return (NULL);
344 }
345
346 void
347 acpi_install_wakeup_handler(struct acpi_softc *sc)
348 {
349         static void     *wakeaddr;
350         void            *wakepages[ACPI_WAKEPAGES];
351 #ifdef __amd64__
352         uint64_t        *pt4, *pt3, *pt2;
353         vm_paddr_t      pt4pa, pt3pa, pt2pa;
354         int             i;
355 #endif
356
357         if (wakeaddr != NULL)
358                 return;
359
360         if (acpi_alloc_wakeup_handler(wakepages) == NULL)
361                 return;
362
363         wakeaddr = wakepages[0];
364         sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
365         sc->acpi_wakephys = vtophys(wakeaddr);
366
367 #ifdef __amd64__
368         pt4 = wakepages[1];
369         pt3 = wakepages[2];
370         pt2 = wakepages[3];
371         pt4pa = vtophys(pt4);
372         pt3pa = vtophys(pt3);
373         pt2pa = vtophys(pt2);
374 #endif
375
376         bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
377
378         /* Patch GDT base address, ljmp targets. */
379         WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
380             sc->acpi_wakephys + bootgdt);
381         WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
382             sc->acpi_wakephys + wakeup_32);
383 #ifdef __amd64__
384         WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
385             sc->acpi_wakephys + wakeup_64);
386         WAKECODE_FIXUP(wakeup_pagetables, uint32_t, pt4pa);
387 #endif
388
389         /* Save pointers to some global data. */
390         WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
391 #ifndef __amd64__
392 #if defined(PAE) || defined(PAE_TABLES)
393         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
394 #else
395         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
396 #endif
397
398 #else /* __amd64__ */
399         /* Create the initial 1GB replicated page tables */
400         for (i = 0; i < 512; i++) {
401                 /*
402                  * Each slot of the level 4 pages points
403                  * to the same level 3 page
404                  */
405                 pt4[i] = (uint64_t)pt3pa;
406                 pt4[i] |= PG_V | PG_RW | PG_U;
407
408                 /*
409                  * Each slot of the level 3 pages points
410                  * to the same level 2 page
411                  */
412                 pt3[i] = (uint64_t)pt2pa;
413                 pt3[i] |= PG_V | PG_RW | PG_U;
414
415                 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
416                 pt2[i] = i * (2 * 1024 * 1024);
417                 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
418         }
419 #endif /* !__amd64__ */
420
421         if (bootverbose)
422                 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
423                     (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
424 }