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[FreeBSD/stable/10.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 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/eventhandler.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/memrange.h>
39 #include <sys/smp.h>
40 #include <sys/systm.h>
41
42 #include <vm/vm.h>
43 #include <vm/pmap.h>
44
45 #include <machine/clock.h>
46 #include <machine/cpu.h>
47 #include <machine/intr_machdep.h>
48 #include <x86/mca.h>
49 #include <machine/pcb.h>
50 #include <machine/pmap.h>
51 #include <machine/specialreg.h>
52 #include <machine/md_var.h>
53
54 #ifdef SMP
55 #include <x86/apicreg.h>
56 #include <machine/smp.h>
57 #include <machine/vmparam.h>
58 #endif
59
60 #include <contrib/dev/acpica/include/acpi.h>
61
62 #include <dev/acpica/acpivar.h>
63
64 #include "acpi_wakecode.h"
65 #include "acpi_wakedata.h"
66
67 /* Make sure the code is less than a page and leave room for the stack. */
68 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
69
70 extern int              acpi_resume_beep;
71 extern int              acpi_reset_video;
72
73 #ifdef SMP
74 extern struct pcb       **susppcbs;
75 static cpuset_t         suspcpus;
76 #else
77 static struct pcb       **susppcbs;
78 #endif
79
80 static void             *acpi_alloc_wakeup_handler(void);
81 static void             acpi_stop_beep(void *);
82
83 #ifdef SMP
84 static int              acpi_wakeup_ap(struct acpi_softc *, int);
85 static void             acpi_wakeup_cpus(struct acpi_softc *);
86 #endif
87
88 #ifdef __amd64__
89 #define ACPI_PAGETABLES 3
90 #else
91 #define ACPI_PAGETABLES 0
92 #endif
93
94 #define WAKECODE_VADDR(sc)                              \
95     ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE))
96 #define WAKECODE_PADDR(sc)                              \
97     ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE))
98 #define WAKECODE_FIXUP(offset, type, val)       do {    \
99         type    *addr;                                  \
100         addr = (type *)(WAKECODE_VADDR(sc) + offset);   \
101         *addr = val;                                    \
102 } while (0)
103
104 static void
105 acpi_stop_beep(void *arg)
106 {
107
108         if (acpi_resume_beep != 0)
109                 timer_spkr_release();
110 }
111
112 #ifdef SMP
113 static int
114 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
115 {
116         int             vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
117         int             apic_id = cpu_apic_ids[cpu];
118         int             ms;
119
120         WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]);
121         WAKECODE_FIXUP(wakeup_gdt, uint16_t, susppcbs[cpu]->pcb_gdt.rd_limit);
122         WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
123             susppcbs[cpu]->pcb_gdt.rd_base);
124
125         ipi_startup(apic_id, vector);
126
127         /* Wait up to 5 seconds for it to resume. */
128         for (ms = 0; ms < 5000; ms++) {
129                 if (!CPU_ISSET(cpu, &suspended_cpus))
130                         return (1);     /* return SUCCESS */
131                 DELAY(1000);
132         }
133         return (0);             /* return FAILURE */
134 }
135
136 #define WARMBOOT_TARGET         0
137 #define WARMBOOT_OFF            (KERNBASE + 0x0467)
138 #define WARMBOOT_SEG            (KERNBASE + 0x0469)
139
140 #define CMOS_REG                (0x70)
141 #define CMOS_DATA               (0x71)
142 #define BIOS_RESET              (0x0f)
143 #define BIOS_WARM               (0x0a)
144
145 static void
146 acpi_wakeup_cpus(struct acpi_softc *sc)
147 {
148         uint32_t        mpbioswarmvec;
149         int             cpu;
150         u_char          mpbiosreason;
151
152         /* save the current value of the warm-start vector */
153         mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
154         outb(CMOS_REG, BIOS_RESET);
155         mpbiosreason = inb(CMOS_DATA);
156
157         /* setup a vector to our boot code */
158         *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
159         *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4;
160         outb(CMOS_REG, BIOS_RESET);
161         outb(CMOS_DATA, BIOS_WARM);     /* 'warm-start' */
162
163         /* Wake up each AP. */
164         for (cpu = 1; cpu < mp_ncpus; cpu++) {
165                 if (!CPU_ISSET(cpu, &suspcpus))
166                         continue;
167                 if (acpi_wakeup_ap(sc, cpu) == 0) {
168                         /* restore the warmstart vector */
169                         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
170                         panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
171                             cpu, cpu_apic_ids[cpu]);
172                 }
173         }
174
175         /* restore the warmstart vector */
176         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
177
178         outb(CMOS_REG, BIOS_RESET);
179         outb(CMOS_DATA, mpbiosreason);
180 }
181 #endif
182
183 int
184 acpi_sleep_machdep(struct acpi_softc *sc, int state)
185 {
186         ACPI_STATUS     status;
187
188         if (sc->acpi_wakeaddr == 0ul)
189                 return (-1);    /* couldn't alloc wake memory */
190
191 #ifdef SMP
192         suspcpus = all_cpus;
193         CPU_CLR(PCPU_GET(cpuid), &suspcpus);
194 #endif
195
196         if (acpi_resume_beep != 0)
197                 timer_spkr_acquire();
198
199         AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc));
200
201         intr_suspend();
202
203         if (savectx(susppcbs[0])) {
204 #ifdef __amd64__
205                 ctx_fpusave(susppcbs[0]->pcb_fpususpend);
206 #endif
207 #ifdef SMP
208                 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
209                         device_printf(sc->acpi_dev, "Failed to suspend APs\n");
210                         return (0);     /* couldn't sleep */
211                 }
212 #endif
213
214                 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
215                 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
216
217 #ifndef __amd64__
218                 WAKECODE_FIXUP(wakeup_cr4, register_t, susppcbs[0]->pcb_cr4);
219 #endif
220                 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]);
221                 WAKECODE_FIXUP(wakeup_gdt, uint16_t,
222                     susppcbs[0]->pcb_gdt.rd_limit);
223                 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
224                     susppcbs[0]->pcb_gdt.rd_base);
225
226                 /* Call ACPICA to enter the desired sleep state */
227                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
228                         status = AcpiEnterSleepStateS4bios();
229                 else
230                         status = AcpiEnterSleepState(state);
231                 if (ACPI_FAILURE(status)) {
232                         device_printf(sc->acpi_dev,
233                             "AcpiEnterSleepState failed - %s\n",
234                             AcpiFormatException(status));
235                         return (0);     /* couldn't sleep */
236                 }
237
238                 for (;;)
239                         ia32_pause();
240         }
241
242         return (1);     /* wakeup successfully */
243 }
244
245 int
246 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
247     int intr_enabled)
248 {
249
250         if (sleep_result == -1)
251                 return (sleep_result);
252
253         if (!intr_enabled) {
254                 /* Wakeup MD procedures in interrupt disabled context */
255                 if (sleep_result == 1) {
256                         pmap_init_pat();
257                         initializecpu();
258                         PCPU_SET(switchtime, 0);
259                         PCPU_SET(switchticks, ticks);
260 #ifdef SMP
261                         if (!CPU_EMPTY(&suspcpus))
262                                 acpi_wakeup_cpus(sc);
263 #endif
264                 }
265
266 #ifdef SMP
267                 if (!CPU_EMPTY(&suspcpus))
268                         restart_cpus(suspcpus);
269 #endif
270                 mca_resume();
271 #ifdef __amd64__
272                 if (vmm_resume_p != NULL)
273                         vmm_resume_p();
274 #endif
275                 intr_resume(/*suspend_cancelled*/false);
276
277                 AcpiSetFirmwareWakingVector(0);
278         } else {
279                 /* Wakeup MD procedures in interrupt enabled context */
280                 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
281                     mem_range_softc.mr_op->reinit != NULL)
282                         mem_range_softc.mr_op->reinit(&mem_range_softc);
283         }
284
285         return (sleep_result);
286 }
287
288 static void *
289 acpi_alloc_wakeup_handler(void)
290 {
291         void            *wakeaddr;
292         int             i;
293
294         /*
295          * Specify the region for our wakeup code.  We want it in the low 1 MB
296          * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
297          * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
298          * and ROM area (0xa0000 and above).  The temporary page tables must be
299          * page-aligned.
300          */
301         wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF,
302             M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul);
303         if (wakeaddr == NULL) {
304                 printf("%s: can't alloc wake memory\n", __func__);
305                 return (NULL);
306         }
307         if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
308             EVENTHANDLER_PRI_LAST) == NULL) {
309                 printf("%s: can't register event handler\n", __func__);
310                 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE,
311                     M_DEVBUF);
312                 return (NULL);
313         }
314         susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
315         for (i = 0; i < mp_ncpus; i++) {
316                 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
317 #ifdef __amd64__
318                 susppcbs[i]->pcb_fpususpend = alloc_fpusave(M_WAITOK);
319 #endif
320         }
321
322         return (wakeaddr);
323 }
324
325 void
326 acpi_install_wakeup_handler(struct acpi_softc *sc)
327 {
328         static void     *wakeaddr = NULL;
329 #ifdef __amd64__
330         uint64_t        *pt4, *pt3, *pt2;
331         int             i;
332 #endif
333
334         if (wakeaddr != NULL)
335                 return;
336
337         wakeaddr = acpi_alloc_wakeup_handler();
338         if (wakeaddr == NULL)
339                 return;
340
341         sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
342         sc->acpi_wakephys = vtophys(wakeaddr);
343
344         bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
345
346         /* Patch GDT base address, ljmp targets. */
347         WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
348             WAKECODE_PADDR(sc) + bootgdt);
349         WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
350             WAKECODE_PADDR(sc) + wakeup_32);
351 #ifdef __amd64__
352         WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
353             WAKECODE_PADDR(sc) + wakeup_64);
354         WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys);
355 #endif
356
357         /* Save pointers to some global data. */
358         WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
359 #ifndef __amd64__
360 #ifdef PAE
361         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
362 #else
363         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
364 #endif
365
366 #else
367         /* Build temporary page tables below realmode code. */
368         pt4 = wakeaddr;
369         pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t);
370         pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t);
371
372         /* Create the initial 1GB replicated page tables */
373         for (i = 0; i < 512; i++) {
374                 /*
375                  * Each slot of the level 4 pages points
376                  * to the same level 3 page
377                  */
378                 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE);
379                 pt4[i] |= PG_V | PG_RW | PG_U;
380
381                 /*
382                  * Each slot of the level 3 pages points
383                  * to the same level 2 page
384                  */
385                 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE));
386                 pt3[i] |= PG_V | PG_RW | PG_U;
387
388                 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
389                 pt2[i] = i * (2 * 1024 * 1024);
390                 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
391         }
392 #endif
393
394         if (bootverbose)
395                 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
396                     (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
397 }