]> CyberLeo.Net >> Repos - FreeBSD/stable/10.git/blob - sys/x86/acpica/acpi_wakeup.c
MFC 259782:
[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
41 #include <vm/vm.h>
42 #include <vm/pmap.h>
43
44 #include <machine/clock.h>
45 #include <machine/cpu.h>
46 #include <machine/intr_machdep.h>
47 #include <x86/mca.h>
48 #include <machine/pcb.h>
49 #include <machine/pmap.h>
50 #include <machine/specialreg.h>
51 #include <machine/md_var.h>
52
53 #ifdef SMP
54 #include <x86/apicreg.h>
55 #include <machine/smp.h>
56 #include <machine/vmparam.h>
57 #endif
58
59 #include <contrib/dev/acpica/include/acpi.h>
60
61 #include <dev/acpica/acpivar.h>
62
63 #include "acpi_wakecode.h"
64 #include "acpi_wakedata.h"
65
66 /* Make sure the code is less than a page and leave room for the stack. */
67 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
68
69 extern int              acpi_resume_beep;
70 extern int              acpi_reset_video;
71
72 #ifdef SMP
73 extern struct pcb       **susppcbs;
74 static cpuset_t         suspcpus;
75 #else
76 static struct pcb       **susppcbs;
77 #endif
78
79 static void             *acpi_alloc_wakeup_handler(void);
80 static void             acpi_stop_beep(void *);
81
82 #ifdef SMP
83 static int              acpi_wakeup_ap(struct acpi_softc *, int);
84 static void             acpi_wakeup_cpus(struct acpi_softc *);
85 #endif
86
87 #ifdef __amd64__
88 #define ACPI_PAGETABLES 3
89 #else
90 #define ACPI_PAGETABLES 0
91 #endif
92
93 #define WAKECODE_VADDR(sc)                              \
94     ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE))
95 #define WAKECODE_PADDR(sc)                              \
96     ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE))
97 #define WAKECODE_FIXUP(offset, type, val)       do {    \
98         type    *addr;                                  \
99         addr = (type *)(WAKECODE_VADDR(sc) + offset);   \
100         *addr = val;                                    \
101 } while (0)
102
103 static void
104 acpi_stop_beep(void *arg)
105 {
106
107         if (acpi_resume_beep != 0)
108                 timer_spkr_release();
109 }
110
111 #ifdef SMP
112 static int
113 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
114 {
115         int             vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
116         int             apic_id = cpu_apic_ids[cpu];
117         int             ms;
118
119         WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]);
120         WAKECODE_FIXUP(wakeup_gdt, uint16_t, susppcbs[cpu]->pcb_gdt.rd_limit);
121         WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
122             susppcbs[cpu]->pcb_gdt.rd_base);
123
124         ipi_startup(apic_id, vector);
125
126         /* Wait up to 5 seconds for it to resume. */
127         for (ms = 0; ms < 5000; ms++) {
128                 if (!CPU_ISSET(cpu, &suspended_cpus))
129                         return (1);     /* return SUCCESS */
130                 DELAY(1000);
131         }
132         return (0);             /* return FAILURE */
133 }
134
135 #define WARMBOOT_TARGET         0
136 #define WARMBOOT_OFF            (KERNBASE + 0x0467)
137 #define WARMBOOT_SEG            (KERNBASE + 0x0469)
138
139 #define CMOS_REG                (0x70)
140 #define CMOS_DATA               (0x71)
141 #define BIOS_RESET              (0x0f)
142 #define BIOS_WARM               (0x0a)
143
144 static void
145 acpi_wakeup_cpus(struct acpi_softc *sc)
146 {
147         uint32_t        mpbioswarmvec;
148         int             cpu;
149         u_char          mpbiosreason;
150
151         /* save the current value of the warm-start vector */
152         mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
153         outb(CMOS_REG, BIOS_RESET);
154         mpbiosreason = inb(CMOS_DATA);
155
156         /* setup a vector to our boot code */
157         *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
158         *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4;
159         outb(CMOS_REG, BIOS_RESET);
160         outb(CMOS_DATA, BIOS_WARM);     /* 'warm-start' */
161
162         /* Wake up each AP. */
163         for (cpu = 1; cpu < mp_ncpus; cpu++) {
164                 if (!CPU_ISSET(cpu, &suspcpus))
165                         continue;
166                 if (acpi_wakeup_ap(sc, cpu) == 0) {
167                         /* restore the warmstart vector */
168                         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
169                         panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
170                             cpu, cpu_apic_ids[cpu]);
171                 }
172         }
173
174         /* restore the warmstart vector */
175         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
176
177         outb(CMOS_REG, BIOS_RESET);
178         outb(CMOS_DATA, mpbiosreason);
179 }
180 #endif
181
182 int
183 acpi_sleep_machdep(struct acpi_softc *sc, int state)
184 {
185         ACPI_STATUS     status;
186
187         if (sc->acpi_wakeaddr == 0ul)
188                 return (-1);    /* couldn't alloc wake memory */
189
190 #ifdef SMP
191         suspcpus = all_cpus;
192         CPU_CLR(PCPU_GET(cpuid), &suspcpus);
193 #endif
194
195         if (acpi_resume_beep != 0)
196                 timer_spkr_acquire();
197
198         AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc));
199
200         intr_suspend();
201
202         if (savectx(susppcbs[0])) {
203 #ifdef __amd64__
204                 ctx_fpusave(susppcbs[0]->pcb_fpususpend);
205 #endif
206 #ifdef SMP
207                 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
208                         device_printf(sc->acpi_dev, "Failed to suspend APs\n");
209                         return (0);     /* couldn't sleep */
210                 }
211 #endif
212
213                 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
214                 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
215
216 #ifndef __amd64__
217                 WAKECODE_FIXUP(wakeup_cr4, register_t, susppcbs[0]->pcb_cr4);
218 #endif
219                 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]);
220                 WAKECODE_FIXUP(wakeup_gdt, uint16_t,
221                     susppcbs[0]->pcb_gdt.rd_limit);
222                 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
223                     susppcbs[0]->pcb_gdt.rd_base);
224
225                 /* Call ACPICA to enter the desired sleep state */
226                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
227                         status = AcpiEnterSleepStateS4bios();
228                 else
229                         status = AcpiEnterSleepState(state);
230                 if (ACPI_FAILURE(status)) {
231                         device_printf(sc->acpi_dev,
232                             "AcpiEnterSleepState failed - %s\n",
233                             AcpiFormatException(status));
234                         return (0);     /* couldn't sleep */
235                 }
236
237                 for (;;)
238                         ia32_pause();
239         }
240
241         return (1);     /* wakeup successfully */
242 }
243
244 int
245 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
246     int intr_enabled)
247 {
248
249         if (sleep_result == -1)
250                 return (sleep_result);
251
252         if (!intr_enabled) {
253                 /* Wakeup MD procedures in interrupt disabled context */
254                 if (sleep_result == 1) {
255                         pmap_init_pat();
256                         initializecpu();
257                         PCPU_SET(switchtime, 0);
258                         PCPU_SET(switchticks, ticks);
259 #ifdef SMP
260                         if (!CPU_EMPTY(&suspcpus))
261                                 acpi_wakeup_cpus(sc);
262 #endif
263                 }
264
265 #ifdef SMP
266                 if (!CPU_EMPTY(&suspcpus))
267                         restart_cpus(suspcpus);
268 #endif
269                 mca_resume();
270 #ifdef __amd64__
271                 if (vmm_resume_p != NULL)
272                         vmm_resume_p();
273 #endif
274                 intr_resume(/*suspend_cancelled*/false);
275
276                 AcpiSetFirmwareWakingVector(0);
277         } else {
278                 /* Wakeup MD procedures in interrupt enabled context */
279                 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
280                     mem_range_softc.mr_op->reinit != NULL)
281                         mem_range_softc.mr_op->reinit(&mem_range_softc);
282         }
283
284         return (sleep_result);
285 }
286
287 static void *
288 acpi_alloc_wakeup_handler(void)
289 {
290         void            *wakeaddr;
291         int             i;
292
293         /*
294          * Specify the region for our wakeup code.  We want it in the low 1 MB
295          * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
296          * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
297          * and ROM area (0xa0000 and above).  The temporary page tables must be
298          * page-aligned.
299          */
300         wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF,
301             M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul);
302         if (wakeaddr == NULL) {
303                 printf("%s: can't alloc wake memory\n", __func__);
304                 return (NULL);
305         }
306         if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
307             EVENTHANDLER_PRI_LAST) == NULL) {
308                 printf("%s: can't register event handler\n", __func__);
309                 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE,
310                     M_DEVBUF);
311                 return (NULL);
312         }
313         susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
314         for (i = 0; i < mp_ncpus; i++) {
315                 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
316 #ifdef __amd64__
317                 susppcbs[i]->pcb_fpususpend = alloc_fpusave(M_WAITOK);
318 #endif
319         }
320
321         return (wakeaddr);
322 }
323
324 void
325 acpi_install_wakeup_handler(struct acpi_softc *sc)
326 {
327         static void     *wakeaddr = NULL;
328 #ifdef __amd64__
329         uint64_t        *pt4, *pt3, *pt2;
330         int             i;
331 #endif
332
333         if (wakeaddr != NULL)
334                 return;
335
336         wakeaddr = acpi_alloc_wakeup_handler();
337         if (wakeaddr == NULL)
338                 return;
339
340         sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
341         sc->acpi_wakephys = vtophys(wakeaddr);
342
343         bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
344
345         /* Patch GDT base address, ljmp targets. */
346         WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
347             WAKECODE_PADDR(sc) + bootgdt);
348         WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
349             WAKECODE_PADDR(sc) + wakeup_32);
350 #ifdef __amd64__
351         WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
352             WAKECODE_PADDR(sc) + wakeup_64);
353         WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys);
354 #endif
355
356         /* Save pointers to some global data. */
357         WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
358 #ifndef __amd64__
359 #ifdef PAE
360         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
361 #else
362         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
363 #endif
364
365 #else
366         /* Build temporary page tables below realmode code. */
367         pt4 = wakeaddr;
368         pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t);
369         pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t);
370
371         /* Create the initial 1GB replicated page tables */
372         for (i = 0; i < 512; i++) {
373                 /*
374                  * Each slot of the level 4 pages points
375                  * to the same level 3 page
376                  */
377                 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE);
378                 pt4[i] |= PG_V | PG_RW | PG_U;
379
380                 /*
381                  * Each slot of the level 3 pages points
382                  * to the same level 2 page
383                  */
384                 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE));
385                 pt3[i] |= PG_V | PG_RW | PG_U;
386
387                 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
388                 pt2[i] = i * (2 * 1024 * 1024);
389                 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
390         }
391 #endif
392
393         if (bootverbose)
394                 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
395                     (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
396 }