acpi_wakeup.c revision 281495
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: head/sys/x86/acpica/acpi_wakeup.c 281495 2015-04-13 15:22:45Z kib $"); 32 33#if defined(__amd64__) 34#define DEV_APIC 35#else 36#include "opt_apic.h" 37#endif 38#ifdef __i386__ 39#include "opt_npx.h" 40#endif 41 42#include <sys/param.h> 43#include <sys/bus.h> 44#include <sys/eventhandler.h> 45#include <sys/kernel.h> 46#include <sys/malloc.h> 47#include <sys/memrange.h> 48#include <sys/smp.h> 49#include <sys/systm.h> 50 51#include <vm/vm.h> 52#include <vm/pmap.h> 53 54#include <machine/clock.h> 55#include <machine/cpu.h> 56#include <machine/intr_machdep.h> 57#include <x86/mca.h> 58#include <machine/pcb.h> 59#include <machine/pmap.h> 60#include <machine/specialreg.h> 61#include <machine/md_var.h> 62 63#ifdef DEV_APIC 64#include <x86/apicreg.h> 65#include <x86/apicvar.h> 66#endif 67#ifdef SMP 68#include <machine/smp.h> 69#include <machine/vmparam.h> 70#endif 71 72#include <contrib/dev/acpica/include/acpi.h> 73 74#include <dev/acpica/acpivar.h> 75 76#include "acpi_wakecode.h" 77#include "acpi_wakedata.h" 78 79/* Make sure the code is less than a page and leave room for the stack. */ 80CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 81 82extern int acpi_resume_beep; 83extern int acpi_reset_video; 84 85#ifdef SMP 86extern struct susppcb **susppcbs; 87static cpuset_t suspcpus; 88#else 89static struct susppcb **susppcbs; 90#endif 91 92static void *acpi_alloc_wakeup_handler(void); 93static void acpi_stop_beep(void *); 94 95#ifdef SMP 96static int acpi_wakeup_ap(struct acpi_softc *, int); 97static void acpi_wakeup_cpus(struct acpi_softc *); 98#endif 99 100#ifdef __amd64__ 101#define ACPI_PAGETABLES 3 102#else 103#define ACPI_PAGETABLES 0 104#endif 105 106#define WAKECODE_VADDR(sc) \ 107 ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE)) 108#define WAKECODE_PADDR(sc) \ 109 ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE)) 110#define WAKECODE_FIXUP(offset, type, val) do { \ 111 type *addr; \ 112 addr = (type *)(WAKECODE_VADDR(sc) + offset); \ 113 *addr = val; \ 114} while (0) 115 116static void 117acpi_stop_beep(void *arg) 118{ 119 120 if (acpi_resume_beep != 0) 121 timer_spkr_release(); 122} 123 124#ifdef SMP 125static int 126acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 127{ 128 struct pcb *pcb; 129 int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff; 130 int apic_id = cpu_apic_ids[cpu]; 131 int ms; 132 133 pcb = &susppcbs[cpu]->sp_pcb; 134 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 135 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 136 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 137 138 ipi_startup(apic_id, vector); 139 140 /* Wait up to 5 seconds for it to resume. */ 141 for (ms = 0; ms < 5000; ms++) { 142 if (!CPU_ISSET(cpu, &suspended_cpus)) 143 return (1); /* return SUCCESS */ 144 DELAY(1000); 145 } 146 return (0); /* return FAILURE */ 147} 148 149#define WARMBOOT_TARGET 0 150#define WARMBOOT_OFF (KERNBASE + 0x0467) 151#define WARMBOOT_SEG (KERNBASE + 0x0469) 152 153#define CMOS_REG (0x70) 154#define CMOS_DATA (0x71) 155#define BIOS_RESET (0x0f) 156#define BIOS_WARM (0x0a) 157 158static void 159acpi_wakeup_cpus(struct acpi_softc *sc) 160{ 161 uint32_t mpbioswarmvec; 162 int cpu; 163 u_char mpbiosreason; 164 165 /* 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); 169 170 /* setup a vector to our boot code */ 171 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; 172 *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4; 173 outb(CMOS_REG, BIOS_RESET); 174 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ 175 176 /* Wake up each AP. */ 177 for (cpu = 1; cpu < mp_ncpus; cpu++) { 178 if (!CPU_ISSET(cpu, &suspcpus)) 179 continue; 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]); 185 } 186 } 187 188 /* restore the warmstart vector */ 189 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 190 191 outb(CMOS_REG, BIOS_RESET); 192 outb(CMOS_DATA, mpbiosreason); 193} 194#endif 195 196int 197acpi_sleep_machdep(struct acpi_softc *sc, int state) 198{ 199 ACPI_STATUS status; 200 struct pcb *pcb; 201 202 if (sc->acpi_wakeaddr == 0ul) 203 return (-1); /* couldn't alloc wake memory */ 204 205#ifdef SMP 206 suspcpus = all_cpus; 207 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 208#endif 209 210 if (acpi_resume_beep != 0) 211 timer_spkr_acquire(); 212 213 AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc)); 214 215 intr_suspend(); 216 217 pcb = &susppcbs[0]->sp_pcb; 218 if (savectx(pcb)) { 219#ifdef __amd64__ 220 fpususpend(susppcbs[0]->sp_fpususpend); 221#elif defined(DEV_NPX) 222 npxsuspend(susppcbs[0]->sp_fpususpend); 223#endif 224#ifdef SMP 225 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { 226 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 227 return (0); /* couldn't sleep */ 228 } 229#endif 230 231 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 232 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 233 234#ifndef __amd64__ 235 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); 236#endif 237 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 238 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 239 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 240 241 /* Call ACPICA to enter the desired sleep state */ 242 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 243 status = AcpiEnterSleepStateS4bios(); 244 else 245 status = AcpiEnterSleepState(state); 246 if (ACPI_FAILURE(status)) { 247 device_printf(sc->acpi_dev, 248 "AcpiEnterSleepState failed - %s\n", 249 AcpiFormatException(status)); 250 return (0); /* couldn't sleep */ 251 } 252 253 for (;;) 254 ia32_pause(); 255 } else { 256#ifdef __amd64__ 257 fpuresume(susppcbs[0]->sp_fpususpend); 258#elif defined(DEV_NPX) 259 npxresume(susppcbs[0]->sp_fpususpend); 260#endif 261 } 262 263 return (1); /* wakeup successfully */ 264} 265 266int 267acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 268 int intr_enabled) 269{ 270 271 if (sleep_result == -1) 272 return (sleep_result); 273 274 if (!intr_enabled) { 275 /* Wakeup MD procedures in interrupt disabled context */ 276 if (sleep_result == 1) { 277 pmap_init_pat(); 278 initializecpu(); 279 PCPU_SET(switchtime, 0); 280 PCPU_SET(switchticks, ticks); 281#ifdef DEV_APIC 282 lapic_xapic_mode(); 283#endif 284#ifdef SMP 285 if (!CPU_EMPTY(&suspcpus)) 286 acpi_wakeup_cpus(sc); 287#endif 288 } 289 290#ifdef SMP 291 if (!CPU_EMPTY(&suspcpus)) 292 restart_cpus(suspcpus); 293#endif 294 mca_resume(); 295#ifdef __amd64__ 296 if (vmm_resume_p != NULL) 297 vmm_resume_p(); 298#endif 299 intr_resume(/*suspend_cancelled*/false); 300 301 AcpiSetFirmwareWakingVector(0); 302 } else { 303 /* Wakeup MD procedures in interrupt enabled context */ 304 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 305 mem_range_softc.mr_op->reinit != NULL) 306 mem_range_softc.mr_op->reinit(&mem_range_softc); 307 } 308 309 return (sleep_result); 310} 311 312static void * 313acpi_alloc_wakeup_handler(void) 314{ 315 void *wakeaddr; 316 int i; 317 318 /* 319 * Specify the region for our wakeup code. We want it in the low 1 MB 320 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 321 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 322 * and ROM area (0xa0000 and above). The temporary page tables must be 323 * page-aligned. 324 */ 325 wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF, 326 M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul); 327 if (wakeaddr == NULL) { 328 printf("%s: can't alloc wake memory\n", __func__); 329 return (NULL); 330 } 331 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 332 EVENTHANDLER_PRI_LAST) == NULL) { 333 printf("%s: can't register event handler\n", __func__); 334 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE, 335 M_DEVBUF); 336 return (NULL); 337 } 338 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 339 for (i = 0; i < mp_ncpus; i++) { 340 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 341 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); 342 } 343 344 return (wakeaddr); 345} 346 347void 348acpi_install_wakeup_handler(struct acpi_softc *sc) 349{ 350 static void *wakeaddr = NULL; 351#ifdef __amd64__ 352 uint64_t *pt4, *pt3, *pt2; 353 int i; 354#endif 355 356 if (wakeaddr != NULL) 357 return; 358 359 wakeaddr = acpi_alloc_wakeup_handler(); 360 if (wakeaddr == NULL) 361 return; 362 363 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 364 sc->acpi_wakephys = vtophys(wakeaddr); 365 366 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode)); 367 368 /* Patch GDT base address, ljmp targets. */ 369 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 370 WAKECODE_PADDR(sc) + bootgdt); 371 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 372 WAKECODE_PADDR(sc) + wakeup_32); 373#ifdef __amd64__ 374 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, 375 WAKECODE_PADDR(sc) + wakeup_64); 376 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys); 377#endif 378 379 /* Save pointers to some global data. */ 380 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 381#ifndef __amd64__ 382#if defined(PAE) || defined(PAE_TABLES) 383 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt)); 384#else 385 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir)); 386#endif 387 388#else 389 /* Build temporary page tables below realmode code. */ 390 pt4 = wakeaddr; 391 pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t); 392 pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t); 393 394 /* Create the initial 1GB replicated page tables */ 395 for (i = 0; i < 512; i++) { 396 /* 397 * Each slot of the level 4 pages points 398 * to the same level 3 page 399 */ 400 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE); 401 pt4[i] |= PG_V | PG_RW | PG_U; 402 403 /* 404 * Each slot of the level 3 pages points 405 * to the same level 2 page 406 */ 407 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE)); 408 pt3[i] |= PG_V | PG_RW | PG_U; 409 410 /* The level 2 page slots are mapped with 2MB pages for 1GB. */ 411 pt2[i] = i * (2 * 1024 * 1024); 412 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; 413 } 414#endif 415 416 if (bootverbose) 417 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", 418 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); 419} 420