Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/x86/acpica/acpi_wakeup.c
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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: releng/11.2/sys/x86/acpica/acpi_wakeup.c 334152 2018-05-24 13:17:24Z kib $"); 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. */ 76 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 77 78 extern int acpi_resume_beep; 79 extern int acpi_reset_video; 80 81 #ifdef SMP 82 extern struct susppcb **susppcbs; 83 static cpuset_t suspcpus; 84 #else 85 static struct susppcb **susppcbs; 86 #endif 87 88 static void *acpi_alloc_wakeup_handler(void **); 89 static void acpi_stop_beep(void *); 90 91 #ifdef SMP 92 static int acpi_wakeup_ap(struct acpi_softc *, int); 93 static 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) 107 108 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 = (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) 149 150 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) = 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 187 188 int 189 acpi_sleep_machdep(struct acpi_softc *sc, int state) 190 { 191 ACPI_STATUS status; 192 struct pcb *pcb; 193 #ifdef __amd64__ 194 struct pcpu *pc; 195 int i; 196 #endif 197 198 if (sc->acpi_wakeaddr == 0ul) 199 return (-1); /* couldn't alloc wake memory */ 200 201 #ifdef SMP 202 suspcpus = all_cpus; 203 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 204 #endif 205 206 if (acpi_resume_beep != 0) 207 timer_spkr_acquire(); 208 209 AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0); 210 211 intr_suspend(); 212 213 pcb = &susppcbs[0]->sp_pcb; 214 if (savectx(pcb)) { 215 #ifdef __amd64__ 216 fpususpend(susppcbs[0]->sp_fpususpend); 217 #else 218 npxsuspend(susppcbs[0]->sp_fpususpend); 219 #endif 220 #ifdef SMP 221 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { 222 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 223 return (0); /* couldn't sleep */ 224 } 225 #endif 226 #ifdef __amd64__ 227 hw_ibrs_active = 0; 228 hw_ssb_active = 0; 229 cpu_stdext_feature3 = 0; 230 CPU_FOREACH(i) { 231 pc = pcpu_find(i); 232 pc->pc_ibpb_set = 0; 233 } 234 #endif 235 236 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 237 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 238 239 #ifdef __amd64__ 240 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER) & 241 ~(EFER_LMA)); 242 #else 243 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); 244 #endif 245 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 246 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 247 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 248 249 /* Call ACPICA to enter the desired sleep state */ 250 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 251 status = AcpiEnterSleepStateS4bios(); 252 else 253 status = AcpiEnterSleepState(state); 254 if (ACPI_FAILURE(status)) { 255 device_printf(sc->acpi_dev, 256 "AcpiEnterSleepState failed - %s\n", 257 AcpiFormatException(status)); 258 return (0); /* couldn't sleep */ 259 } 260 261 for (;;) 262 ia32_pause(); 263 } else { 264 #ifdef __amd64__ 265 fpuresume(susppcbs[0]->sp_fpususpend); 266 #else 267 npxresume(susppcbs[0]->sp_fpususpend); 268 #endif 269 } 270 271 return (1); /* wakeup successfully */ 272 } 273 274 int 275 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 276 int intr_enabled) 277 { 278 279 if (sleep_result == -1) 280 return (sleep_result); 281 282 if (!intr_enabled) { 283 /* Wakeup MD procedures in interrupt disabled context */ 284 if (sleep_result == 1) { 285 pmap_init_pat(); 286 initializecpu(); 287 PCPU_SET(switchtime, 0); 288 PCPU_SET(switchticks, ticks); 289 #ifdef DEV_APIC 290 lapic_xapic_mode(); 291 #endif 292 #ifdef SMP 293 if (!CPU_EMPTY(&suspcpus)) 294 acpi_wakeup_cpus(sc); 295 #endif 296 } 297 298 #ifdef SMP 299 if (!CPU_EMPTY(&suspcpus)) 300 resume_cpus(suspcpus); 301 #endif 302 mca_resume(); 303 #ifdef __amd64__ 304 if (vmm_resume_p != NULL) 305 vmm_resume_p(); 306 #endif 307 intr_resume(/*suspend_cancelled*/false); 308 309 AcpiSetFirmwareWakingVector(0, 0); 310 } else { 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); 315 } 316 317 return (sleep_result); 318 } 319 320 static void * 321 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES]) 322 { 323 int i; 324 325 memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages)); 326 327 /* 328 * Specify the region for our wakeup code. We want it in the low 1 MB 329 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 330 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 331 * and ROM area (0xa0000 and above). The temporary page tables must be 332 * page-aligned. 333 */ 334 for (i = 0; i < ACPI_WAKEPAGES; i++) { 335 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT, 336 0x500, 0xa0000, PAGE_SIZE, 0ul); 337 if (wakepages[i] == NULL) { 338 printf("%s: can't alloc wake memory\n", __func__); 339 goto freepages; 340 } 341 } 342 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 343 EVENTHANDLER_PRI_LAST) == NULL) { 344 printf("%s: can't register event handler\n", __func__); 345 goto freepages; 346 } 347 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 348 for (i = 0; i < mp_ncpus; i++) { 349 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 350 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); 351 } 352 353 return (wakepages); 354 355 freepages: 356 for (i = 0; i < ACPI_WAKEPAGES; i++) 357 if (wakepages[i] != NULL) 358 contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF); 359 return (NULL); 360 } 361 362 void 363 acpi_install_wakeup_handler(struct acpi_softc *sc) 364 { 365 static void *wakeaddr; 366 void *wakepages[ACPI_WAKEPAGES]; 367 #ifdef __amd64__ 368 uint64_t *pt4, *pt3, *pt2; 369 vm_paddr_t pt4pa, pt3pa, pt2pa; 370 int i; 371 #endif 372 373 if (wakeaddr != NULL) 374 return; 375 376 if (acpi_alloc_wakeup_handler(wakepages) == NULL) 377 return; 378 379 wakeaddr = wakepages[0]; 380 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 381 sc->acpi_wakephys = vtophys(wakeaddr); 382 383 #ifdef __amd64__ 384 pt4 = wakepages[1]; 385 pt3 = wakepages[2]; 386 pt2 = wakepages[3]; 387 pt4pa = vtophys(pt4); 388 pt3pa = vtophys(pt3); 389 pt2pa = vtophys(pt2); 390 #endif 391 392 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 393 394 /* Patch GDT base address, ljmp targets. */ 395 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 396 sc->acpi_wakephys + bootgdt); 397 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 398 sc->acpi_wakephys + wakeup_32); 399 #ifdef __amd64__ 400 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, 401 sc->acpi_wakephys + wakeup_64); 402 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, pt4pa); 403 #endif 404 405 /* Save pointers to some global data. */ 406 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 407 #ifndef __amd64__ 408 #if defined(PAE) || defined(PAE_TABLES) 409 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt)); 410 #else 411 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir)); 412 #endif 413 414 #else /* __amd64__ */ 415 /* Create the initial 1GB replicated page tables */ 416 for (i = 0; i < 512; i++) { 417 /* 418 * Each slot of the level 4 pages points 419 * to the same level 3 page 420 */ 421 pt4[i] = (uint64_t)pt3pa; 422 pt4[i] |= PG_V | PG_RW | PG_U; 423 424 /* 425 * Each slot of the level 3 pages points 426 * to the same level 2 page 427 */ 428 pt3[i] = (uint64_t)pt2pa; 429 pt3[i] |= PG_V | PG_RW | PG_U; 430 431 /* The level 2 page slots are mapped with 2MB pages for 1GB. */ 432 pt2[i] = i * (2 * 1024 * 1024); 433 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; 434 } 435 #endif /* !__amd64__ */ 436 437 if (bootverbose) 438 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", 439 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); 440 }
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