acpi_wakeup.c revision 276084
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/10/sys/x86/acpica/acpi_wakeup.c 276084 2014-12-22 21:32:39Z jhb $"); 32 33#ifdef __i386__ 34#include "opt_npx.h" 35#endif 36 37#include <sys/param.h> 38#include <sys/bus.h> 39#include <sys/eventhandler.h> 40#include <sys/kernel.h> 41#include <sys/malloc.h> 42#include <sys/memrange.h> 43#include <sys/smp.h> 44#include <sys/systm.h> 45 46#include <vm/vm.h> 47#include <vm/pmap.h> 48 49#include <machine/clock.h> 50#include <machine/cpu.h> 51#include <machine/intr_machdep.h> 52#include <x86/mca.h> 53#include <machine/pcb.h> 54#include <machine/pmap.h> 55#include <machine/specialreg.h> 56#include <machine/md_var.h> 57 58#ifdef SMP 59#include <x86/apicreg.h> 60#include <machine/smp.h> 61#include <machine/vmparam.h> 62#endif 63 64#include <contrib/dev/acpica/include/acpi.h> 65 66#include <dev/acpica/acpivar.h> 67 68#include "acpi_wakecode.h" 69#include "acpi_wakedata.h" 70 71/* Make sure the code is less than a page and leave room for the stack. */ 72CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 73 74extern int acpi_resume_beep; 75extern int acpi_reset_video; 76 77#ifdef SMP 78extern struct susppcb **susppcbs; 79static cpuset_t suspcpus; 80#else 81static struct susppcb **susppcbs; 82#endif 83 84static void *acpi_alloc_wakeup_handler(void); 85static void acpi_stop_beep(void *); 86 87#ifdef SMP 88static int acpi_wakeup_ap(struct acpi_softc *, int); 89static void acpi_wakeup_cpus(struct acpi_softc *); 90#endif 91 92#ifdef __amd64__ 93#define ACPI_PAGETABLES 3 94#else 95#define ACPI_PAGETABLES 0 96#endif 97 98#define WAKECODE_VADDR(sc) \ 99 ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE)) 100#define WAKECODE_PADDR(sc) \ 101 ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE)) 102#define WAKECODE_FIXUP(offset, type, val) do { \ 103 type *addr; \ 104 addr = (type *)(WAKECODE_VADDR(sc) + 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 = (WAKECODE_PADDR(sc) >> 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) = WAKECODE_PADDR(sc) >> 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(WAKECODE_PADDR(sc)); 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#elif defined(DEV_NPX) 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#ifndef __amd64__ 227 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); 228#endif 229 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 230 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 231 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 232 233 /* Call ACPICA to enter the desired sleep state */ 234 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 235 status = AcpiEnterSleepStateS4bios(); 236 else 237 status = AcpiEnterSleepState(state); 238 if (ACPI_FAILURE(status)) { 239 device_printf(sc->acpi_dev, 240 "AcpiEnterSleepState failed - %s\n", 241 AcpiFormatException(status)); 242 return (0); /* couldn't sleep */ 243 } 244 245 for (;;) 246 ia32_pause(); 247 } else { 248#ifdef __amd64__ 249 fpuresume(susppcbs[0]->sp_fpususpend); 250#elif defined(DEV_NPX) 251 npxresume(susppcbs[0]->sp_fpususpend); 252#endif 253 } 254 255 return (1); /* wakeup successfully */ 256} 257 258int 259acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 260 int intr_enabled) 261{ 262 263 if (sleep_result == -1) 264 return (sleep_result); 265 266 if (!intr_enabled) { 267 /* Wakeup MD procedures in interrupt disabled context */ 268 if (sleep_result == 1) { 269 pmap_init_pat(); 270 initializecpu(); 271 PCPU_SET(switchtime, 0); 272 PCPU_SET(switchticks, ticks); 273#ifdef SMP 274 if (!CPU_EMPTY(&suspcpus)) 275 acpi_wakeup_cpus(sc); 276#endif 277 } 278 279#ifdef SMP 280 if (!CPU_EMPTY(&suspcpus)) 281 restart_cpus(suspcpus); 282#endif 283 mca_resume(); 284#ifdef __amd64__ 285 if (vmm_resume_p != NULL) 286 vmm_resume_p(); 287#endif 288 intr_resume(/*suspend_cancelled*/false); 289 290 AcpiSetFirmwareWakingVector(0); 291 } else { 292 /* Wakeup MD procedures in interrupt enabled context */ 293 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 294 mem_range_softc.mr_op->reinit != NULL) 295 mem_range_softc.mr_op->reinit(&mem_range_softc); 296 } 297 298 return (sleep_result); 299} 300 301static void * 302acpi_alloc_wakeup_handler(void) 303{ 304 void *wakeaddr; 305 int i; 306 307 /* 308 * Specify the region for our wakeup code. We want it in the low 1 MB 309 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 310 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 311 * and ROM area (0xa0000 and above). The temporary page tables must be 312 * page-aligned. 313 */ 314 wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF, 315 M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul); 316 if (wakeaddr == NULL) { 317 printf("%s: can't alloc wake memory\n", __func__); 318 return (NULL); 319 } 320 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 321 EVENTHANDLER_PRI_LAST) == NULL) { 322 printf("%s: can't register event handler\n", __func__); 323 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE, 324 M_DEVBUF); 325 return (NULL); 326 } 327 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 328 for (i = 0; i < mp_ncpus; i++) { 329 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 330 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); 331 } 332 333 return (wakeaddr); 334} 335 336void 337acpi_install_wakeup_handler(struct acpi_softc *sc) 338{ 339 static void *wakeaddr = NULL; 340#ifdef __amd64__ 341 uint64_t *pt4, *pt3, *pt2; 342 int i; 343#endif 344 345 if (wakeaddr != NULL) 346 return; 347 348 wakeaddr = acpi_alloc_wakeup_handler(); 349 if (wakeaddr == NULL) 350 return; 351 352 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 353 sc->acpi_wakephys = vtophys(wakeaddr); 354 355 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode)); 356 357 /* Patch GDT base address, ljmp targets. */ 358 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 359 WAKECODE_PADDR(sc) + bootgdt); 360 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 361 WAKECODE_PADDR(sc) + wakeup_32); 362#ifdef __amd64__ 363 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, 364 WAKECODE_PADDR(sc) + wakeup_64); 365 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys); 366#endif 367 368 /* Save pointers to some global data. */ 369 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 370#ifndef __amd64__ 371#ifdef PAE 372 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt)); 373#else 374 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir)); 375#endif 376 377#else 378 /* Build temporary page tables below realmode code. */ 379 pt4 = wakeaddr; 380 pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t); 381 pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t); 382 383 /* Create the initial 1GB replicated page tables */ 384 for (i = 0; i < 512; i++) { 385 /* 386 * Each slot of the level 4 pages points 387 * to the same level 3 page 388 */ 389 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE); 390 pt4[i] |= PG_V | PG_RW | PG_U; 391 392 /* 393 * Each slot of the level 3 pages points 394 * to the same level 2 page 395 */ 396 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE)); 397 pt3[i] |= PG_V | PG_RW | PG_U; 398 399 /* The level 2 page slots are mapped with 2MB pages for 1GB. */ 400 pt2[i] = i * (2 * 1024 * 1024); 401 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; 402 } 403#endif 404 405 if (bootverbose) 406 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", 407 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); 408} 409