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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 #ifdef __i386__
39 #include "opt_npx.h"
40 #endif
41
42 #include <sys/param.h>
43 #include <sys/bus.h>
44 #include <sys/eventhandler.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/memrange.h>
48 #include <sys/smp.h>
49 #include <sys/systm.h>
50
51 #include <vm/vm.h>
52 #include <vm/pmap.h>
53
54 #include <machine/clock.h>
55 #include <machine/cpu.h>
56 #include <machine/intr_machdep.h>
57 #include <x86/mca.h>
58 #include <machine/pcb.h>
59 #include <machine/specialreg.h>
60 #include <machine/md_var.h>
61
62 #ifdef DEV_APIC
63 #include <x86/apicreg.h>
64 #include <x86/apicvar.h>
65 #endif
66 #ifdef SMP
67 #include <machine/smp.h>
68 #include <machine/vmparam.h>
69 #endif
70
71 #include <contrib/dev/acpica/include/acpi.h>
72
73 #include <dev/acpica/acpivar.h>
74
75 #include "acpi_wakecode.h"
76 #include "acpi_wakedata.h"
77
78 /* Make sure the code is less than a page and leave room for the stack. */
79 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
80
81 extern int              acpi_resume_beep;
82 extern int              acpi_reset_video;
83
84 #ifdef SMP
85 extern struct susppcb   **susppcbs;
86 static cpuset_t         suspcpus;
87 #else
88 static struct susppcb   **susppcbs;
89 #endif
90
91 static void             *acpi_alloc_wakeup_handler(void **);
92 static void             acpi_stop_beep(void *);
93
94 #ifdef SMP
95 static int              acpi_wakeup_ap(struct acpi_softc *, int);
96 static void             acpi_wakeup_cpus(struct acpi_softc *);
97 #endif
98
99 #ifdef __amd64__
100 #define ACPI_WAKEPAGES  4
101 #else
102 #define ACPI_WAKEPAGES  1
103 #endif
104
105 #define WAKECODE_FIXUP(offset, type, val)       do {    \
106         type    *addr;                                  \
107         addr = (type *)(sc->acpi_wakeaddr + (offset));  \
108         *addr = val;                                    \
109 } while (0)
110
111 static void
112 acpi_stop_beep(void *arg)
113 {
114
115         if (acpi_resume_beep != 0)
116                 timer_spkr_release();
117 }
118
119 #ifdef SMP
120 static int
121 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
122 {
123         struct pcb *pcb;
124         int             vector = (sc->acpi_wakephys >> 12) & 0xff;
125         int             apic_id = cpu_apic_ids[cpu];
126         int             ms;
127
128         pcb = &susppcbs[cpu]->sp_pcb;
129         WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
130         WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
131         WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
132
133         ipi_startup(apic_id, vector);
134
135         /* Wait up to 5 seconds for it to resume. */
136         for (ms = 0; ms < 5000; ms++) {
137                 if (!CPU_ISSET(cpu, &suspended_cpus))
138                         return (1);     /* return SUCCESS */
139                 DELAY(1000);
140         }
141         return (0);             /* return FAILURE */
142 }
143
144 #define WARMBOOT_TARGET         0
145 #define WARMBOOT_OFF            (KERNBASE + 0x0467)
146 #define WARMBOOT_SEG            (KERNBASE + 0x0469)
147
148 #define CMOS_REG                (0x70)
149 #define CMOS_DATA               (0x71)
150 #define BIOS_RESET              (0x0f)
151 #define BIOS_WARM               (0x0a)
152
153 static void
154 acpi_wakeup_cpus(struct acpi_softc *sc)
155 {
156         uint32_t        mpbioswarmvec;
157         int             cpu;
158         u_char          mpbiosreason;
159
160         /* save the current value of the warm-start vector */
161         mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
162         outb(CMOS_REG, BIOS_RESET);
163         mpbiosreason = inb(CMOS_DATA);
164
165         /* setup a vector to our boot code */
166         *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
167         *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4;
168         outb(CMOS_REG, BIOS_RESET);
169         outb(CMOS_DATA, BIOS_WARM);     /* 'warm-start' */
170
171         /* Wake up each AP. */
172         for (cpu = 1; cpu < mp_ncpus; cpu++) {
173                 if (!CPU_ISSET(cpu, &suspcpus))
174                         continue;
175                 if (acpi_wakeup_ap(sc, cpu) == 0) {
176                         /* restore the warmstart vector */
177                         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
178                         panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
179                             cpu, cpu_apic_ids[cpu]);
180                 }
181         }
182
183         /* restore the warmstart vector */
184         *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
185
186         outb(CMOS_REG, BIOS_RESET);
187         outb(CMOS_DATA, mpbiosreason);
188 }
189 #endif
190
191 int
192 acpi_sleep_machdep(struct acpi_softc *sc, int state)
193 {
194         ACPI_STATUS     status;
195         struct pcb      *pcb;
196
197         if (sc->acpi_wakeaddr == 0ul)
198                 return (-1);    /* couldn't alloc wake memory */
199
200 #ifdef SMP
201         suspcpus = all_cpus;
202         CPU_CLR(PCPU_GET(cpuid), &suspcpus);
203 #endif
204
205         if (acpi_resume_beep != 0)
206                 timer_spkr_acquire();
207
208         AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0);
209
210         intr_suspend();
211
212         pcb = &susppcbs[0]->sp_pcb;
213         if (savectx(pcb)) {
214 #ifdef __amd64__
215                 fpususpend(susppcbs[0]->sp_fpususpend);
216 #elif defined(DEV_NPX)
217                 npxsuspend(susppcbs[0]->sp_fpususpend);
218 #endif
219 #ifdef SMP
220                 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
221                         device_printf(sc->acpi_dev, "Failed to suspend APs\n");
222                         return (0);     /* couldn't sleep */
223                 }
224 #endif
225
226                 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
227                 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
228
229 #ifndef __amd64__
230                 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4);
231 #endif
232                 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
233                 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
234                 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
235
236                 /* Call ACPICA to enter the desired sleep state */
237                 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
238                         status = AcpiEnterSleepStateS4bios();
239                 else
240                         status = AcpiEnterSleepState(state);
241                 if (ACPI_FAILURE(status)) {
242                         device_printf(sc->acpi_dev,
243                             "AcpiEnterSleepState failed - %s\n",
244                             AcpiFormatException(status));
245                         return (0);     /* couldn't sleep */
246                 }
247
248                 for (;;)
249                         ia32_pause();
250         } else {
251 #ifdef __amd64__
252                 fpuresume(susppcbs[0]->sp_fpususpend);
253 #elif defined(DEV_NPX)
254                 npxresume(susppcbs[0]->sp_fpususpend);
255 #endif
256         }
257
258         return (1);     /* wakeup successfully */
259 }
260
261 int
262 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
263     int intr_enabled)
264 {
265
266         if (sleep_result == -1)
267                 return (sleep_result);
268
269         if (!intr_enabled) {
270                 /* Wakeup MD procedures in interrupt disabled context */
271                 if (sleep_result == 1) {
272                         pmap_init_pat();
273                         initializecpu();
274                         PCPU_SET(switchtime, 0);
275                         PCPU_SET(switchticks, ticks);
276 #ifdef DEV_APIC
277                         lapic_xapic_mode();
278 #endif
279 #ifdef SMP
280                         if (!CPU_EMPTY(&suspcpus))
281                                 acpi_wakeup_cpus(sc);
282 #endif
283                 }
284
285 #ifdef SMP
286                 if (!CPU_EMPTY(&suspcpus))
287                         restart_cpus(suspcpus);
288 #endif
289                 mca_resume();
290 #ifdef __amd64__
291                 if (vmm_resume_p != NULL)
292                         vmm_resume_p();
293 #endif
294                 intr_resume(/*suspend_cancelled*/false);
295
296                 AcpiSetFirmwareWakingVector(0, 0);
297         } else {
298                 /* Wakeup MD procedures in interrupt enabled context */
299                 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
300                     mem_range_softc.mr_op->reinit != NULL)
301                         mem_range_softc.mr_op->reinit(&mem_range_softc);
302         }
303
304         return (sleep_result);
305 }
306
307 static void *
308 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES])
309 {
310         int             i;
311
312         memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages));
313
314         /*
315          * Specify the region for our wakeup code.  We want it in the low 1 MB
316          * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
317          * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
318          * and ROM area (0xa0000 and above).  The temporary page tables must be
319          * page-aligned.
320          */
321         for (i = 0; i < ACPI_WAKEPAGES; i++) {
322                 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT,
323                     0x500, 0xa0000, PAGE_SIZE, 0ul);
324                 if (wakepages[i] == NULL) {
325                         printf("%s: can't alloc wake memory\n", __func__);
326                         goto freepages;
327                 }
328         }
329         if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
330             EVENTHANDLER_PRI_LAST) == NULL) {
331                 printf("%s: can't register event handler\n", __func__);
332                 goto freepages;
333         }
334         susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
335         for (i = 0; i < mp_ncpus; i++) {
336                 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
337                 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK);
338         }
339
340         return (wakepages);
341
342 freepages:
343         for (i = 0; i < ACPI_WAKEPAGES; i++)
344                 if (wakepages[i] != NULL)
345                         contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF);
346         return (NULL);
347 }
348
349 void
350 acpi_install_wakeup_handler(struct acpi_softc *sc)
351 {
352         static void     *wakeaddr;
353         void            *wakepages[ACPI_WAKEPAGES];
354 #ifdef __amd64__
355         uint64_t        *pt4, *pt3, *pt2;
356         vm_paddr_t      pt4pa, pt3pa, pt2pa;
357         int             i;
358 #endif
359
360         if (wakeaddr != NULL)
361                 return;
362
363         if (acpi_alloc_wakeup_handler(wakepages) == NULL)
364                 return;
365
366         wakeaddr = wakepages[0];
367         sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
368         sc->acpi_wakephys = vtophys(wakeaddr);
369
370 #ifdef __amd64__
371         pt4 = wakepages[1];
372         pt3 = wakepages[2];
373         pt2 = wakepages[3];
374         pt4pa = vtophys(pt4);
375         pt3pa = vtophys(pt3);
376         pt2pa = vtophys(pt2);
377 #endif
378
379         bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
380
381         /* Patch GDT base address, ljmp targets. */
382         WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
383             sc->acpi_wakephys + bootgdt);
384         WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
385             sc->acpi_wakephys + wakeup_32);
386 #ifdef __amd64__
387         WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
388             sc->acpi_wakephys + wakeup_64);
389         WAKECODE_FIXUP(wakeup_pagetables, uint32_t, pt4pa);
390 #endif
391
392         /* Save pointers to some global data. */
393         WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
394 #ifndef __amd64__
395 #if defined(PAE) || defined(PAE_TABLES)
396         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
397 #else
398         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
399 #endif
400
401 #else /* __amd64__ */
402         /* Create the initial 1GB replicated page tables */
403         for (i = 0; i < 512; i++) {
404                 /*
405                  * Each slot of the level 4 pages points
406                  * to the same level 3 page
407                  */
408                 pt4[i] = (uint64_t)pt3pa;
409                 pt4[i] |= PG_V | PG_RW | PG_U;
410
411                 /*
412                  * Each slot of the level 3 pages points
413                  * to the same level 2 page
414                  */
415                 pt3[i] = (uint64_t)pt2pa;
416                 pt3[i] |= PG_V | PG_RW | PG_U;
417
418                 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
419                 pt2[i] = i * (2 * 1024 * 1024);
420                 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
421         }
422 #endif /* !__amd64__ */
423
424         if (bootverbose)
425                 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
426                     (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
427 }