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>
53 #include <machine/clock.h>
54 #include <machine/cpu.h>
55 #include <machine/intr_machdep.h>
57 #include <machine/pcb.h>
58 #include <machine/specialreg.h>
59 #include <machine/md_var.h>
62 #include <x86/apicreg.h>
63 #include <x86/apicvar.h>
66 #include <machine/smp.h>
67 #include <machine/vmparam.h>
70 #include <contrib/dev/acpica/include/acpi.h>
72 #include <dev/acpica/acpivar.h>
74 #include "acpi_wakecode.h"
75 #include "acpi_wakedata.h"
77 /* Make sure the code is less than a page and leave room for the stack. */
78 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
80 extern int acpi_resume_beep;
81 extern int acpi_reset_video;
82 extern int acpi_susp_bounce;
85 extern struct susppcb **susppcbs;
86 static cpuset_t suspcpus;
88 static struct susppcb **susppcbs;
91 static void *acpi_alloc_wakeup_handler(void **);
92 static void acpi_stop_beep(void *);
95 static int acpi_wakeup_ap(struct acpi_softc *, int);
96 static void acpi_wakeup_cpus(struct acpi_softc *);
100 #define ACPI_WAKEPAGES 4
102 #define ACPI_WAKEPAGES 1
105 #define WAKECODE_FIXUP(offset, type, val) do { \
107 addr = (type *)(sc->acpi_wakeaddr + (offset)); \
112 acpi_stop_beep(void *arg)
115 if (acpi_resume_beep != 0)
116 timer_spkr_release();
121 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
124 int vector = (sc->acpi_wakephys >> 12) & 0xff;
125 int apic_id = cpu_apic_ids[cpu];
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);
133 ipi_startup(apic_id, vector);
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 */
141 return (0); /* return FAILURE */
144 #define WARMBOOT_TARGET 0
146 #define WARMBOOT_OFF (KERNBASE + 0x0467)
147 #define WARMBOOT_SEG (KERNBASE + 0x0469)
149 #define WARMBOOT_OFF (PMAP_MAP_LOW + 0x0467)
150 #define WARMBOOT_SEG (PMAP_MAP_LOW + 0x0469)
153 #define CMOS_REG (0x70)
154 #define CMOS_DATA (0x71)
155 #define BIOS_RESET (0x0f)
156 #define BIOS_WARM (0x0a)
159 acpi_wakeup_cpus(struct acpi_softc *sc)
161 uint32_t mpbioswarmvec;
165 /* save the current value of the warm-start vector */
166 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
167 outb(CMOS_REG, BIOS_RESET);
168 mpbiosreason = inb(CMOS_DATA);
170 /* setup a vector to our boot code */
171 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
172 *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4;
173 outb(CMOS_REG, BIOS_RESET);
174 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
176 /* Wake up each AP. */
177 for (cpu = 1; cpu < mp_ncpus; cpu++) {
178 if (!CPU_ISSET(cpu, &suspcpus))
180 if (acpi_wakeup_ap(sc, cpu) == 0) {
181 /* restore the warmstart vector */
182 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
183 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
184 cpu, cpu_apic_ids[cpu]);
190 * Remove the identity mapping of low memory for all CPUs and sync
191 * the TLB for the BSP. The APs are now spinning in
192 * cpususpend_handler() and we will release them soon. Then each
193 * will invalidate its TLB.
199 /* restore the warmstart vector */
200 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
202 outb(CMOS_REG, BIOS_RESET);
203 outb(CMOS_DATA, mpbiosreason);
208 acpi_sleep_machdep(struct acpi_softc *sc, int state)
217 if (sc->acpi_wakeaddr == 0ul)
218 return (-1); /* couldn't alloc wake memory */
222 CPU_CLR(PCPU_GET(cpuid), &suspcpus);
225 if (acpi_resume_beep != 0)
226 timer_spkr_acquire();
228 AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0);
232 pcb = &susppcbs[0]->sp_pcb;
235 fpususpend(susppcbs[0]->sp_fpususpend);
237 npxsuspend(susppcbs[0]->sp_fpususpend);
240 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
241 device_printf(sc->acpi_dev, "Failed to suspend APs\n");
242 return (0); /* couldn't sleep */
248 cpu_stdext_feature3 = 0;
255 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
256 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
259 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER) &
262 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4);
264 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb);
265 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit);
266 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base);
270 * Map some low memory with virt == phys for ACPI wakecode
271 * to use to jump to high memory after enabling paging. This
272 * is the same as for similar jump in locore, except the
273 * jump is a single instruction, and we know its address
274 * more precisely so only need a single PTD, and we have to
275 * be careful to use the kernel map (PTD[0] is for curthread
276 * which may be a user thread in deprecated APIs).
278 PTD[KPTDI] = PTD[LOWPTDI];
281 /* Call ACPICA to enter the desired sleep state */
282 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
283 status = AcpiEnterSleepStateS4bios();
285 status = AcpiEnterSleepState(state);
286 if (ACPI_FAILURE(status)) {
287 device_printf(sc->acpi_dev,
288 "AcpiEnterSleepState failed - %s\n",
289 AcpiFormatException(status));
290 return (0); /* couldn't sleep */
293 if (acpi_susp_bounce)
300 fpuresume(susppcbs[0]->sp_fpususpend);
302 npxresume(susppcbs[0]->sp_fpususpend);
306 return (1); /* wakeup successfully */
310 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
314 if (sleep_result == -1)
315 return (sleep_result);
318 /* Wakeup MD procedures in interrupt disabled context */
319 if (sleep_result == 1) {
322 PCPU_SET(switchtime, 0);
323 PCPU_SET(switchticks, ticks);
328 if (!CPU_EMPTY(&suspcpus))
329 acpi_wakeup_cpus(sc);
334 if (!CPU_EMPTY(&suspcpus))
335 resume_cpus(suspcpus);
339 if (vmm_resume_p != NULL)
342 intr_resume(/*suspend_cancelled*/false);
344 AcpiSetFirmwareWakingVector(0, 0);
346 /* Wakeup MD procedures in interrupt enabled context */
347 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
348 mem_range_softc.mr_op->reinit != NULL)
349 mem_range_softc.mr_op->reinit(&mem_range_softc);
352 return (sleep_result);
356 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES])
360 memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages));
363 * Specify the region for our wakeup code. We want it in the low 1 MB
364 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
365 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
366 * and ROM area (0xa0000 and above). The temporary page tables must be
369 for (i = 0; i < ACPI_WAKEPAGES; i++) {
370 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT,
371 0x500, 0xa0000, PAGE_SIZE, 0ul);
372 if (wakepages[i] == NULL) {
373 printf("%s: can't alloc wake memory\n", __func__);
377 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
378 EVENTHANDLER_PRI_LAST) == NULL) {
379 printf("%s: can't register event handler\n", __func__);
382 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
383 for (i = 0; i < mp_ncpus; i++) {
384 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
385 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK);
391 for (i = 0; i < ACPI_WAKEPAGES; i++)
392 if (wakepages[i] != NULL)
393 contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF);
398 acpi_install_wakeup_handler(struct acpi_softc *sc)
400 static void *wakeaddr;
401 void *wakepages[ACPI_WAKEPAGES];
403 uint64_t *pt4, *pt3, *pt2;
404 vm_paddr_t pt4pa, pt3pa, pt2pa;
408 if (wakeaddr != NULL)
411 if (acpi_alloc_wakeup_handler(wakepages) == NULL)
414 wakeaddr = wakepages[0];
415 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
416 sc->acpi_wakephys = vtophys(wakeaddr);
422 pt4pa = vtophys(pt4);
423 pt3pa = vtophys(pt3);
424 pt2pa = vtophys(pt2);
427 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode));
429 /* Patch GDT base address, ljmp targets. */
430 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
431 sc->acpi_wakephys + bootgdt);
432 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
433 sc->acpi_wakephys + wakeup_32);
435 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
436 sc->acpi_wakephys + wakeup_64);
437 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, pt4pa);
440 /* Save pointers to some global data. */
441 WAKECODE_FIXUP(wakeup_ret, void *, resumectx);
443 #if defined(PAE) || defined(PAE_TABLES)
444 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt));
446 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir));
449 #else /* __amd64__ */
450 /* Create the initial 1GB replicated page tables */
451 for (i = 0; i < 512; i++) {
453 * Each slot of the level 4 pages points
454 * to the same level 3 page
456 pt4[i] = (uint64_t)pt3pa;
457 pt4[i] |= PG_V | PG_RW | PG_U;
460 * Each slot of the level 3 pages points
461 * to the same level 2 page
463 pt3[i] = (uint64_t)pt2pa;
464 pt3[i] |= PG_V | PG_RW | PG_U;
466 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
467 pt2[i] = i * (2 * 1024 * 1024);
468 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
470 #endif /* !__amd64__ */
473 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n",
474 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys);