acpi_wakeup.c revision 331909
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: stable/11/sys/x86/acpica/acpi_wakeup.c 331909 2018-04-03 07:31:22Z avg $"); 32 33#if defined(__amd64__) 34#define DEV_APIC 35#else 36#include "opt_apic.h" 37#endif 38 39#include <sys/param.h> 40#include <sys/bus.h> 41#include <sys/eventhandler.h> 42#include <sys/kernel.h> 43#include <sys/malloc.h> 44#include <sys/memrange.h> 45#include <sys/smp.h> 46#include <sys/systm.h> 47 48#include <vm/vm.h> 49#include <vm/pmap.h> 50 51#include <machine/clock.h> 52#include <machine/cpu.h> 53#include <machine/intr_machdep.h> 54#include <x86/mca.h> 55#include <machine/pcb.h> 56#include <machine/specialreg.h> 57#include <machine/md_var.h> 58 59#ifdef DEV_APIC 60#include <x86/apicreg.h> 61#include <x86/apicvar.h> 62#endif 63#ifdef SMP 64#include <machine/smp.h> 65#include <machine/vmparam.h> 66#endif 67 68#include <contrib/dev/acpica/include/acpi.h> 69 70#include <dev/acpica/acpivar.h> 71 72#include "acpi_wakecode.h" 73#include "acpi_wakedata.h" 74 75/* Make sure the code is less than a page and leave room for the stack. */ 76CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 77 78extern int acpi_resume_beep; 79extern int acpi_reset_video; 80 81#ifdef SMP 82extern struct susppcb **susppcbs; 83static cpuset_t suspcpus; 84#else 85static struct susppcb **susppcbs; 86#endif 87 88static void *acpi_alloc_wakeup_handler(void **); 89static void acpi_stop_beep(void *); 90 91#ifdef SMP 92static int acpi_wakeup_ap(struct acpi_softc *, int); 93static void acpi_wakeup_cpus(struct acpi_softc *); 94#endif 95 96#ifdef __amd64__ 97#define ACPI_WAKEPAGES 4 98#else 99#define ACPI_WAKEPAGES 1 100#endif 101 102#define WAKECODE_FIXUP(offset, type, val) do { \ 103 type *addr; \ 104 addr = (type *)(sc->acpi_wakeaddr + (offset)); \ 105 *addr = val; \ 106} while (0) 107 108static void 109acpi_stop_beep(void *arg) 110{ 111 112 if (acpi_resume_beep != 0) 113 timer_spkr_release(); 114} 115 116#ifdef SMP 117static int 118acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 119{ 120 struct pcb *pcb; 121 int vector = (sc->acpi_wakephys >> 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 150static void 151acpi_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) = sc->acpi_wakephys >> 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 188int 189acpi_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(sc->acpi_wakephys, 0); 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#else 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#ifdef __amd64__ 227 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER) & 228 ~(EFER_LMA)); 229#else 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#else 254 npxresume(susppcbs[0]->sp_fpususpend); 255#endif 256 } 257 258 return (1); /* wakeup successfully */ 259} 260 261int 262acpi_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 resume_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 307static void * 308acpi_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 342freepages: 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 349void 350acpi_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} 428