2 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2003 Peter Wemm
5 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
35 #include <sys/eventhandler.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/memrange.h>
44 #include <machine/clock.h>
45 #include <machine/intr_machdep.h>
47 #include <machine/pcb.h>
48 #include <machine/pmap.h>
49 #include <machine/specialreg.h>
50 #include <machine/md_var.h>
53 #include <x86/apicreg.h>
54 #include <machine/smp.h>
55 #include <machine/vmparam.h>
58 #include <contrib/dev/acpica/include/acpi.h>
60 #include <dev/acpica/acpivar.h>
62 #include "acpi_wakecode.h"
63 #include "acpi_wakedata.h"
65 /* Make sure the code is less than a page and leave room for the stack. */
66 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024);
68 extern int acpi_resume_beep;
69 extern int acpi_reset_video;
72 extern struct pcb **susppcbs;
73 extern void **suspfpusave;
74 static cpuset_t suspcpus;
76 static struct pcb **susppcbs;
77 static void **suspfpusave;
80 int acpi_restorecpu(uint64_t, vm_offset_t);
82 static void *acpi_alloc_wakeup_handler(void);
83 static void acpi_stop_beep(void *);
86 static int acpi_wakeup_ap(struct acpi_softc *, int);
87 static void acpi_wakeup_cpus(struct acpi_softc *);
90 #define WAKECODE_VADDR(sc) ((sc)->acpi_wakeaddr + (3 * PAGE_SIZE))
91 #define WAKECODE_PADDR(sc) ((sc)->acpi_wakephys + (3 * PAGE_SIZE))
92 #define WAKECODE_FIXUP(offset, type, val) do { \
94 addr = (type *)(WAKECODE_VADDR(sc) + offset); \
99 acpi_stop_beep(void *arg)
102 if (acpi_resume_beep != 0)
103 timer_spkr_release();
108 acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
110 int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
111 int apic_id = cpu_apic_ids[cpu];
114 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]);
115 WAKECODE_FIXUP(wakeup_fpusave, void *, suspfpusave[cpu]);
116 WAKECODE_FIXUP(wakeup_gdt, uint16_t, susppcbs[cpu]->pcb_gdt.rd_limit);
117 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
118 susppcbs[cpu]->pcb_gdt.rd_base);
119 WAKECODE_FIXUP(wakeup_cpu, int, cpu);
121 /* do an INIT IPI: assert RESET */
122 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
123 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id);
125 /* wait for pending status end */
128 /* do an INIT IPI: deassert RESET */
129 lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL |
130 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0);
132 /* wait for pending status end */
133 DELAY(10000); /* wait ~10mS */
137 * next we do a STARTUP IPI: the previous INIT IPI might still be
138 * latched, (P5 bug) this 1st STARTUP would then terminate
139 * immediately, and the previously started INIT IPI would continue. OR
140 * the previous INIT IPI has already run. and this STARTUP IPI will
141 * run. OR the previous INIT IPI was ignored. and this STARTUP IPI
145 /* do a STARTUP IPI */
146 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
147 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
150 DELAY(200); /* wait ~200uS */
153 * finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
154 * the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
155 * this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
156 * recognized after hardware RESET or INIT IPI.
159 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
160 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
163 DELAY(200); /* wait ~200uS */
165 /* Wait up to 5 seconds for it to start. */
166 for (ms = 0; ms < 5000; ms++) {
167 if (*(int *)(WAKECODE_VADDR(sc) + wakeup_cpu) == 0)
168 return (1); /* return SUCCESS */
171 return (0); /* return FAILURE */
174 #define WARMBOOT_TARGET 0
175 #define WARMBOOT_OFF (KERNBASE + 0x0467)
176 #define WARMBOOT_SEG (KERNBASE + 0x0469)
178 #define CMOS_REG (0x70)
179 #define CMOS_DATA (0x71)
180 #define BIOS_RESET (0x0f)
181 #define BIOS_WARM (0x0a)
184 acpi_wakeup_cpus(struct acpi_softc *sc)
186 uint32_t mpbioswarmvec;
190 /* save the current value of the warm-start vector */
191 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
192 outb(CMOS_REG, BIOS_RESET);
193 mpbiosreason = inb(CMOS_DATA);
195 /* setup a vector to our boot code */
196 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
197 *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4;
198 outb(CMOS_REG, BIOS_RESET);
199 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
201 /* Wake up each AP. */
202 for (cpu = 1; cpu < mp_ncpus; cpu++) {
203 if (!CPU_ISSET(cpu, &suspcpus))
205 if (acpi_wakeup_ap(sc, cpu) == 0) {
206 /* restore the warmstart vector */
207 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
208 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)",
209 cpu, cpu_apic_ids[cpu]);
213 /* restore the warmstart vector */
214 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
216 outb(CMOS_REG, BIOS_RESET);
217 outb(CMOS_DATA, mpbiosreason);
222 acpi_sleep_machdep(struct acpi_softc *sc, int state)
226 if (sc->acpi_wakeaddr == 0ul)
227 return (-1); /* couldn't alloc wake memory */
231 CPU_CLR(PCPU_GET(cpuid), &suspcpus);
234 if (acpi_resume_beep != 0)
235 timer_spkr_acquire();
237 AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc));
241 if (savectx(susppcbs[0])) {
242 ctx_fpusave(suspfpusave[0]);
244 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) {
245 device_printf(sc->acpi_dev, "Failed to suspend APs\n");
246 return (0); /* couldn't sleep */
250 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0));
251 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0));
253 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]);
254 WAKECODE_FIXUP(wakeup_fpusave, void *, suspfpusave[0]);
255 WAKECODE_FIXUP(wakeup_gdt, uint16_t,
256 susppcbs[0]->pcb_gdt.rd_limit);
257 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
258 susppcbs[0]->pcb_gdt.rd_base);
259 WAKECODE_FIXUP(wakeup_cpu, int, 0);
261 /* Call ACPICA to enter the desired sleep state */
262 if (state == ACPI_STATE_S4 && sc->acpi_s4bios)
263 status = AcpiEnterSleepStateS4bios();
265 status = AcpiEnterSleepState(state, acpi_sleep_flags);
266 if (ACPI_FAILURE(status)) {
267 device_printf(sc->acpi_dev,
268 "AcpiEnterSleepState failed - %s\n",
269 AcpiFormatException(status));
270 return (0); /* couldn't sleep */
277 return (1); /* wakeup successfully */
281 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result,
285 if (sleep_result == -1)
286 return (sleep_result);
289 /* Wakeup MD procedures in interrupt disabled context */
290 if (sleep_result == 1) {
292 load_cr3(susppcbs[0]->pcb_cr3);
294 PCPU_SET(switchtime, 0);
295 PCPU_SET(switchticks, ticks);
297 if (!CPU_EMPTY(&suspcpus))
298 acpi_wakeup_cpus(sc);
303 if (!CPU_EMPTY(&suspcpus))
304 restart_cpus(suspcpus);
309 AcpiSetFirmwareWakingVector(0);
311 /* Wakeup MD procedures in interrupt enabled context */
312 if (sleep_result == 1 && mem_range_softc.mr_op != NULL &&
313 mem_range_softc.mr_op->reinit != NULL)
314 mem_range_softc.mr_op->reinit(&mem_range_softc);
317 return (sleep_result);
321 acpi_alloc_wakeup_handler(void)
327 * Specify the region for our wakeup code. We want it in the low 1 MB
328 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA
329 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT),
330 * and ROM area (0xa0000 and above). The temporary page tables must be
333 wakeaddr = contigmalloc(4 * PAGE_SIZE, M_DEVBUF, M_WAITOK, 0x500,
334 0xa0000, PAGE_SIZE, 0ul);
335 if (wakeaddr == NULL) {
336 printf("%s: can't alloc wake memory\n", __func__);
339 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL,
340 EVENTHANDLER_PRI_LAST) == NULL) {
341 printf("%s: can't register event handler\n", __func__);
342 contigfree(wakeaddr, 4 * PAGE_SIZE, M_DEVBUF);
345 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK);
346 suspfpusave = malloc(mp_ncpus * sizeof(void *), M_DEVBUF, M_WAITOK);
347 for (i = 0; i < mp_ncpus; i++) {
348 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK);
349 suspfpusave[i] = alloc_fpusave(M_WAITOK);
356 acpi_install_wakeup_handler(struct acpi_softc *sc)
358 static void *wakeaddr = NULL;
359 uint64_t *pt4, *pt3, *pt2;
362 if (wakeaddr != NULL)
365 wakeaddr = acpi_alloc_wakeup_handler();
366 if (wakeaddr == NULL)
369 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr;
370 sc->acpi_wakephys = vtophys(wakeaddr);
372 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode));
374 /* Patch GDT base address, ljmp targets and page table base address. */
375 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t,
376 WAKECODE_PADDR(sc) + bootgdt);
377 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t,
378 WAKECODE_PADDR(sc) + wakeup_32);
379 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t,
380 WAKECODE_PADDR(sc) + wakeup_64);
381 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys);
383 /* Save pointers to some global data. */
384 WAKECODE_FIXUP(wakeup_retaddr, void *, acpi_restorecpu);
385 WAKECODE_FIXUP(wakeup_kpml4, uint64_t, KPML4phys);
386 WAKECODE_FIXUP(wakeup_ctx, vm_offset_t,
387 WAKECODE_VADDR(sc) + wakeup_ctx);
388 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER));
389 WAKECODE_FIXUP(wakeup_star, uint64_t, rdmsr(MSR_STAR));
390 WAKECODE_FIXUP(wakeup_lstar, uint64_t, rdmsr(MSR_LSTAR));
391 WAKECODE_FIXUP(wakeup_cstar, uint64_t, rdmsr(MSR_CSTAR));
392 WAKECODE_FIXUP(wakeup_sfmask, uint64_t, rdmsr(MSR_SF_MASK));
393 WAKECODE_FIXUP(wakeup_xsmask, uint64_t, xsave_mask);
395 /* Build temporary page tables below realmode code. */
397 pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t);
398 pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t);
400 /* Create the initial 1GB replicated page tables */
401 for (i = 0; i < 512; i++) {
403 * Each slot of the level 4 pages points
404 * to the same level 3 page
406 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE);
407 pt4[i] |= PG_V | PG_RW | PG_U;
410 * Each slot of the level 3 pages points
411 * to the same level 2 page
413 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE));
414 pt3[i] |= PG_V | PG_RW | PG_U;
416 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
417 pt2[i] = i * (2 * 1024 * 1024);
418 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
422 device_printf(sc->acpi_dev, "wakeup code va %p pa %p\n",
423 (void *)sc->acpi_wakeaddr, (void *)sc->acpi_wakephys);