2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
5 * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
6 * Copyright (c) 2003 Peter Wemm
7 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #if defined(__amd64__)
41 #include <sys/param.h>
43 #include <sys/eventhandler.h>
44 #include <sys/kernel.h>
45 #include <sys/malloc.h>
46 #include <sys/memrange.h>
48 #include <sys/systm.h>
54 #include <machine/clock.h>
55 #include <machine/cpu.h>
56 #include <machine/intr_machdep.h>
57 #include <machine/md_var.h>
59 #include <machine/pcb.h>
60 #include <machine/specialreg.h>
61 #include <x86/ucode.h>
64 #include <x86/apicreg.h>
65 #include <x86/apicvar.h>
68 #include <machine/smp.h>
69 #include <machine/vmparam.h>
72 #include <contrib/dev/acpica/include/acpi.h>
74 #include <dev/acpica/acpivar.h>
76 #include "acpi_wakecode.h"
77 #include "acpi_wakedata.h"
79 /* Make sure the code is less than a page and leave room for the stack. */
80 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
82 extern int acpi_resume_beep;
83 extern int acpi_reset_video;
84 extern int acpi_susp_bounce;
87 extern struct susppcb **susppcbs;
88 static cpuset_t suspcpus;
90 static struct susppcb **susppcbs;
93 static void *acpi_alloc_wakeup_handler(void **);
94 static void acpi_stop_beep(void *);
97 static int acpi_wakeup_ap(struct acpi_softc *, int);
98 static void acpi_wakeup_cpus(struct acpi_softc *);
102 #define ACPI_WAKEPAGES 4
104 #define ACPI_WAKEPAGES 1
107 #define WAKECODE_FIXUP(offset, type, val) do { \
109 addr = (type *)(sc->acpi_wakeaddr + (offset)); \
114 acpi_stop_beep(void *arg)
117 if (acpi_resume_beep != 0)
118 timer_spkr_release();
123 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
126 int vector = (sc->acpi_wakephys >> 12) & 0xff;
127 int apic_id = cpu_apic_ids[cpu];
130 pcb = &susppcbs[cpu]->sp_pcb;
131 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
132 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
133 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
135 ipi_startup(apic_id, vector);
137 /* Wait up to 5 seconds for it to resume. */
138 for (ms = 0; ms < 5000; ms++) {
139 if (!CPU_ISSET(cpu, &suspended_cpus))
140 return (1); /* return SUCCESS */
143 return (0); /* return FAILURE */
146 #define WARMBOOT_TARGET 0
148 #define WARMBOOT_OFF (KERNBASE + 0x0467)
149 #define WARMBOOT_SEG (KERNBASE + 0x0469)
151 #define WARMBOOT_OFF (PMAP_MAP_LOW + 0x0467)
152 #define WARMBOOT_SEG (PMAP_MAP_LOW + 0x0469)
155 #define CMOS_REG (0x70)
156 #define CMOS_DATA (0x71)
157 #define BIOS_RESET (0x0f)
158 #define BIOS_WARM (0x0a)
161 acpi_wakeup_cpus(struct acpi_softc *sc)
163 uint32_t mpbioswarmvec;
167 /* save the current value of the warm-start vector */
168 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
169 outb(CMOS_REG, BIOS_RESET);
170 mpbiosreason = inb(CMOS_DATA);
172 /* setup a vector to our boot code */
173 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
174 *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4;
175 outb(CMOS_REG, BIOS_RESET);
176 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
178 /* Wake up each AP. */
179 for (cpu = 1; cpu < mp_ncpus; cpu++) {
180 if (!CPU_ISSET(cpu, &suspcpus))
182 if (acpi_wakeup_ap(sc, cpu) == 0) {
183 /* restore the warmstart vector */
184 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
185 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
186 cpu, cpu_apic_ids[cpu]);
192 * Remove the identity mapping of low memory for all CPUs and sync
193 * the TLB for the BSP. The APs are now spinning in
194 * cpususpend_handler() and we will release them soon. Then each
195 * will invalidate its TLB.
201 /* restore the warmstart vector */
202 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
204 outb(CMOS_REG, BIOS_RESET);
205 outb(CMOS_DATA, mpbiosreason);
210 acpi_sleep_machdep(struct acpi_softc *sc, int state)
219 if (sc->acpi_wakeaddr == 0ul)
220 return (-1); /* couldn't alloc wake memory */
224 CPU_CLR(PCPU_GET(cpuid), &suspcpus);
227 if (acpi_resume_beep != 0)
228 timer_spkr_acquire();
230 AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0);
234 pcb = &susppcbs[0]->sp_pcb;
237 fpususpend(susppcbs[0]->sp_fpususpend);
239 npxsuspend(susppcbs[0]->sp_fpususpend);
242 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
243 device_printf(sc->acpi_dev, "Failed to suspend APs\n");
244 return (0); /* couldn't sleep */
250 cpu_stdext_feature3 = 0;
257 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
258 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
261 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER) &
264 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4);
266 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
267 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
268 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
272 * Map some low memory with virt == phys for ACPI wakecode
273 * to use to jump to high memory after enabling paging. This
274 * is the same as for similar jump in locore, except the
275 * jump is a single instruction, and we know its address
276 * more precisely so only need a single PTD, and we have to
277 * be careful to use the kernel map (PTD[0] is for curthread
278 * which may be a user thread in deprecated APIs).
280 PTD[KPTDI] = PTD[LOWPTDI];
283 /* Call ACPICA to enter the desired sleep state */
284 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
285 status = AcpiEnterSleepStateS4bios();
287 status = AcpiEnterSleepState(state);
288 if (ACPI_FAILURE(status)) {
289 device_printf(sc->acpi_dev,
290 "AcpiEnterSleepState failed - %s\n",
291 AcpiFormatException(status));
292 return (0); /* couldn't sleep */
295 if (acpi_susp_bounce)
302 * Re-initialize console hardware as soon as possibe.
303 * No console output (e.g. printf) is allowed before
308 fpuresume(susppcbs[0]->sp_fpususpend);
310 npxresume(susppcbs[0]->sp_fpususpend);
314 return (1); /* wakeup successfully */
318 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
322 if (sleep_result == -1)
323 return (sleep_result);
326 /* Wakeup MD procedures in interrupt disabled context */
327 if (sleep_result == 1) {
331 PCPU_SET(switchtime, 0);
332 PCPU_SET(switchticks, ticks);
337 if (!CPU_EMPTY(&suspcpus))
338 acpi_wakeup_cpus(sc);
343 if (!CPU_EMPTY(&suspcpus))
344 resume_cpus(suspcpus);
348 if (vmm_resume_p != NULL)
351 intr_resume(/*suspend_cancelled*/false);
353 AcpiSetFirmwareWakingVector(0, 0);
355 /* Wakeup MD procedures in interrupt enabled context */
356 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
357 mem_range_softc.mr_op->reinit != NULL)
358 mem_range_softc.mr_op->reinit(&mem_range_softc);
361 return (sleep_result);
365 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES])
369 memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages));
372 * Specify the region for our wakeup code. We want it in the low 1 MB
373 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
374 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
375 * and ROM area (0xa0000 and above). The temporary page tables must be
378 for (i = 0; i < ACPI_WAKEPAGES; i++) {
379 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT,
380 0x500, 0xa0000, PAGE_SIZE, 0ul);
381 if (wakepages[i] == NULL) {
382 printf("%s: can't alloc wake memory\n", __func__);
386 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
387 EVENTHANDLER_PRI_LAST) == NULL) {
388 printf("%s: can't register event handler\n", __func__);
391 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
392 for (i = 0; i < mp_ncpus; i++) {
393 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
394 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK);
400 for (i = 0; i < ACPI_WAKEPAGES; i++)
401 if (wakepages[i] != NULL)
402 contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF);
407 acpi_install_wakeup_handler(struct acpi_softc *sc)
409 static void *wakeaddr;
410 void *wakepages[ACPI_WAKEPAGES];
412 uint64_t *pt4, *pt3, *pt2;
413 vm_paddr_t pt4pa, pt3pa, pt2pa;
417 if (wakeaddr != NULL)
420 if (acpi_alloc_wakeup_handler(wakepages) == NULL)
423 wakeaddr = wakepages[0];
424 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
425 sc->acpi_wakephys = vtophys(wakeaddr);
431 pt4pa = vtophys(pt4);
432 pt3pa = vtophys(pt3);
433 pt2pa = vtophys(pt2);
436 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
438 /* Patch GDT base address, ljmp targets. */
439 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
440 sc->acpi_wakephys + bootgdt);
441 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
442 sc->acpi_wakephys + wakeup_32);
444 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
445 sc->acpi_wakephys + wakeup_64);
446 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, pt4pa);
449 /* Save pointers to some global data. */
450 WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
452 #if defined(PAE) || defined(PAE_TABLES)
453 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
455 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
458 #else /* __amd64__ */
459 /* Create the initial 1GB replicated page tables */
460 for (i = 0; i < 512; i++) {
462 * Each slot of the level 4 pages points
463 * to the same level 3 page
465 pt4[i] = (uint64_t)pt3pa;
466 pt4[i] |= PG_V | PG_RW | PG_U;
469 * Each slot of the level 3 pages points
470 * to the same level 2 page
472 pt3[i] = (uint64_t)pt2pa;
473 pt3[i] |= PG_V | PG_RW | PG_U;
475 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
476 pt2[i] = i * (2 * 1024 * 1024);
477 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
479 #endif /* !__amd64__ */
482 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
483 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);