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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 #ifdef __i386__
34 #include "opt_npx.h"
35 #endif
36
37 #include <sys/param.h>
38 #include <sys/bus.h>
39 #include <sys/eventhandler.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/memrange.h>
43 #include <sys/smp.h>
44 #include <sys/systm.h>
45
46 #include <vm/vm.h>
47 #include <vm/pmap.h>
48
49 #include <machine/clock.h>
50 #include <machine/cpu.h>
51 #include <machine/intr_machdep.h>
52 #include <x86/mca.h>
53 #include <machine/pcb.h>
54 #include <machine/pmap.h>
55 #include <machine/specialreg.h>
56 #include <machine/md_var.h>
57
58 #ifdef SMP
59 #include <x86/apicreg.h>
60 #include <machine/smp.h>
61 #include <machine/vmparam.h>
62 #endif
63
64 #include <contrib/dev/acpica/include/acpi.h>
65
66 #include <dev/acpica/acpivar.h>
67
68 #include "acpi_wakecode.h"
69 #include "acpi_wakedata.h"
70
71 /* Make sure the code is less than a page and leave room for the stack. */
72 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
73
74 extern int              acpi_resume_beep;
75 extern int              acpi_reset_video;
76
77 #ifdef SMP
78 extern struct susppcb   **susppcbs;
79 static cpuset_t         suspcpus;
80 #else
81 static struct susppcb   **susppcbs;
82 #endif
83
84 static void             *acpi_alloc_wakeup_handler(void);
85 static void             acpi_stop_beep(void *);
86
87 #ifdef SMP
88 static int              acpi_wakeup_ap(struct acpi_softc *, int);
89 static void             acpi_wakeup_cpus(struct acpi_softc *);
90 #endif
91
92 #ifdef __amd64__
93 #define ACPI_PAGETABLES 3
94 #else
95 #define ACPI_PAGETABLES 0
96 #endif
97
98 #define WAKECODE_VADDR(sc)                              \
99     ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE))
100 #define WAKECODE_PADDR(sc)                              \
101     ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE))
102 #define WAKECODE_FIXUP(offset, type, val)       do {    \
103         type    *addr;                                  \
104         addr = (type *)(WAKECODE_VADDR(sc) + 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 = (WAKECODE_PADDR(sc) >> 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) = WAKECODE_PADDR(sc) >> 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(WAKECODE_PADDR(sc));
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 #elif defined(DEV_NPX)
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 #elif defined(DEV_NPX)
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 SMP
274                         if (!CPU_EMPTY(&suspcpus))
275                                 acpi_wakeup_cpus(sc);
276 #endif
277                 }
278
279 #ifdef SMP
280                 if (!CPU_EMPTY(&suspcpus))
281                         restart_cpus(suspcpus);
282 #endif
283                 mca_resume();
284 #ifdef __amd64__
285                 if (vmm_resume_p != NULL)
286                         vmm_resume_p();
287 #endif
288                 intr_resume(/*suspend_cancelled*/false);
289
290                 AcpiSetFirmwareWakingVector(0);
291         } else {
292                 /* Wakeup MD procedures in interrupt enabled context */
293                 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
294                     mem_range_softc.mr_op->reinit != NULL)
295                         mem_range_softc.mr_op->reinit(&mem_range_softc);
296         }
297
298         return (sleep_result);
299 }
300
301 static void *
302 acpi_alloc_wakeup_handler(void)
303 {
304         void            *wakeaddr;
305         int             i;
306
307         /*
308          * Specify the region for our wakeup code.  We want it in the low 1 MB
309          * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
310          * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
311          * and ROM area (0xa0000 and above).  The temporary page tables must be
312          * page-aligned.
313          */
314         wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF,
315             M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul);
316         if (wakeaddr == NULL) {
317                 printf("%s: can't alloc wake memory\n", __func__);
318                 return (NULL);
319         }
320         if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
321             EVENTHANDLER_PRI_LAST) == NULL) {
322                 printf("%s: can't register event handler\n", __func__);
323                 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE,
324                     M_DEVBUF);
325                 return (NULL);
326         }
327         susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
328         for (i = 0; i < mp_ncpus; i++) {
329                 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
330                 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK);
331         }
332
333         return (wakeaddr);
334 }
335
336 void
337 acpi_install_wakeup_handler(struct acpi_softc *sc)
338 {
339         static void     *wakeaddr = NULL;
340 #ifdef __amd64__
341         uint64_t        *pt4, *pt3, *pt2;
342         int             i;
343 #endif
344
345         if (wakeaddr != NULL)
346                 return;
347
348         wakeaddr = acpi_alloc_wakeup_handler();
349         if (wakeaddr == NULL)
350                 return;
351
352         sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
353         sc->acpi_wakephys = vtophys(wakeaddr);
354
355         bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
356
357         /* Patch GDT base address, ljmp targets. */
358         WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
359             WAKECODE_PADDR(sc) + bootgdt);
360         WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
361             WAKECODE_PADDR(sc) + wakeup_32);
362 #ifdef __amd64__
363         WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
364             WAKECODE_PADDR(sc) + wakeup_64);
365         WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys);
366 #endif
367
368         /* Save pointers to some global data. */
369         WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
370 #ifndef __amd64__
371 #if defined(PAE) || defined(PAE_TABLES)
372         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
373 #else
374         WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
375 #endif
376
377 #else
378         /* Build temporary page tables below realmode code. */
379         pt4 = wakeaddr;
380         pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t);
381         pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t);
382
383         /* Create the initial 1GB replicated page tables */
384         for (i = 0; i < 512; i++) {
385                 /*
386                  * Each slot of the level 4 pages points
387                  * to the same level 3 page
388                  */
389                 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE);
390                 pt4[i] |= PG_V | PG_RW | PG_U;
391
392                 /*
393                  * Each slot of the level 3 pages points
394                  * to the same level 2 page
395                  */
396                 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE));
397                 pt3[i] |= PG_V | PG_RW | PG_U;
398
399                 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
400                 pt2[i] = i * (2 * 1024 * 1024);
401                 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
402         }
403 #endif
404
405         if (bootverbose)
406                 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
407                     (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);
408 }