acpi_wakeup.c revision 237037
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 237037 2012-06-13 22:53:56Z jkim $"); 32 33#include <sys/param.h> 34#include <sys/bus.h> 35#include <sys/eventhandler.h> 36#include <sys/kernel.h> 37#include <sys/malloc.h> 38#include <sys/memrange.h> 39#include <sys/smp.h> 40 41#include <vm/vm.h> 42#include <vm/pmap.h> 43 44#include <machine/clock.h> 45#include <machine/intr_machdep.h> 46#include <x86/mca.h> 47#include <machine/pcb.h> 48#include <machine/pmap.h> 49#include <machine/specialreg.h> 50#include <machine/md_var.h> 51 52#ifdef SMP 53#include <x86/apicreg.h> 54#include <machine/smp.h> 55#include <machine/vmparam.h> 56#endif 57 58#include <contrib/dev/acpica/include/acpi.h> 59 60#include <dev/acpica/acpivar.h> 61 62#include "acpi_wakecode.h" 63#include "acpi_wakedata.h" 64 65/* Make sure the code is less than a page and leave room for the stack. */ 66CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 67 68extern int acpi_resume_beep; 69extern int acpi_reset_video; 70 71#ifdef SMP 72extern struct pcb **susppcbs; 73static cpuset_t suspcpus; 74#else 75static struct pcb **susppcbs; 76#endif 77 78static void *acpi_alloc_wakeup_handler(void); 79static void acpi_stop_beep(void *); 80 81#ifdef SMP 82static int acpi_wakeup_ap(struct acpi_softc *, int); 83static void acpi_wakeup_cpus(struct acpi_softc *); 84#endif 85 86#ifdef __amd64__ 87#define ACPI_PAGETABLES 3 88#else 89#define ACPI_PAGETABLES 0 90#endif 91 92#define WAKECODE_VADDR(sc) \ 93 ((sc)->acpi_wakeaddr + (ACPI_PAGETABLES * PAGE_SIZE)) 94#define WAKECODE_PADDR(sc) \ 95 ((sc)->acpi_wakephys + (ACPI_PAGETABLES * PAGE_SIZE)) 96#define WAKECODE_FIXUP(offset, type, val) do { \ 97 type *addr; \ 98 addr = (type *)(WAKECODE_VADDR(sc) + offset); \ 99 *addr = val; \ 100} while (0) 101 102static void 103acpi_stop_beep(void *arg) 104{ 105 106 if (acpi_resume_beep != 0) 107 timer_spkr_release(); 108} 109 110#ifdef SMP 111static int 112acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 113{ 114 int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff; 115 int apic_id = cpu_apic_ids[cpu]; 116 int ms; 117 118 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]); 119 WAKECODE_FIXUP(wakeup_gdt, uint16_t, susppcbs[cpu]->pcb_gdt.rd_limit); 120 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, 121 susppcbs[cpu]->pcb_gdt.rd_base); 122 123 ipi_startup(apic_id, vector); 124 125 /* Wait up to 5 seconds for it to resume. */ 126 for (ms = 0; ms < 5000; ms++) { 127 if (!CPU_ISSET(cpu, &suspended_cpus)) 128 return (1); /* return SUCCESS */ 129 DELAY(1000); 130 } 131 return (0); /* return FAILURE */ 132} 133 134#define WARMBOOT_TARGET 0 135#define WARMBOOT_OFF (KERNBASE + 0x0467) 136#define WARMBOOT_SEG (KERNBASE + 0x0469) 137 138#define CMOS_REG (0x70) 139#define CMOS_DATA (0x71) 140#define BIOS_RESET (0x0f) 141#define BIOS_WARM (0x0a) 142 143static void 144acpi_wakeup_cpus(struct acpi_softc *sc) 145{ 146 uint32_t mpbioswarmvec; 147 int cpu; 148 u_char mpbiosreason; 149 150 /* save the current value of the warm-start vector */ 151 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); 152 outb(CMOS_REG, BIOS_RESET); 153 mpbiosreason = inb(CMOS_DATA); 154 155 /* setup a vector to our boot code */ 156 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; 157 *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4; 158 outb(CMOS_REG, BIOS_RESET); 159 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ 160 161 /* Wake up each AP. */ 162 for (cpu = 1; cpu < mp_ncpus; cpu++) { 163 if (!CPU_ISSET(cpu, &suspcpus)) 164 continue; 165 if (acpi_wakeup_ap(sc, cpu) == 0) { 166 /* restore the warmstart vector */ 167 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 168 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", 169 cpu, cpu_apic_ids[cpu]); 170 } 171 } 172 173 /* restore the warmstart vector */ 174 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 175 176 outb(CMOS_REG, BIOS_RESET); 177 outb(CMOS_DATA, mpbiosreason); 178} 179#endif 180 181int 182acpi_sleep_machdep(struct acpi_softc *sc, int state) 183{ 184 ACPI_STATUS status; 185 186 if (sc->acpi_wakeaddr == 0ul) 187 return (-1); /* couldn't alloc wake memory */ 188 189#ifdef SMP 190 suspcpus = all_cpus; 191 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 192#endif 193 194 if (acpi_resume_beep != 0) 195 timer_spkr_acquire(); 196 197 AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc)); 198 199 intr_suspend(); 200 201 if (savectx(susppcbs[0])) { 202#ifdef __amd64__ 203 ctx_fpusave(susppcbs[0]->pcb_fpususpend); 204#endif 205#ifdef SMP 206 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { 207 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 208 return (0); /* couldn't sleep */ 209 } 210#endif 211 212 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 213 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 214 215#ifndef __amd64__ 216 WAKECODE_FIXUP(wakeup_cr4, register_t, susppcbs[0]->pcb_cr4); 217#endif 218 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]); 219 WAKECODE_FIXUP(wakeup_gdt, uint16_t, 220 susppcbs[0]->pcb_gdt.rd_limit); 221 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, 222 susppcbs[0]->pcb_gdt.rd_base); 223 224 /* Call ACPICA to enter the desired sleep state */ 225 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 226 status = AcpiEnterSleepStateS4bios(); 227 else 228 status = AcpiEnterSleepState(state, acpi_sleep_flags); 229 if (ACPI_FAILURE(status)) { 230 device_printf(sc->acpi_dev, 231 "AcpiEnterSleepState failed - %s\n", 232 AcpiFormatException(status)); 233 return (0); /* couldn't sleep */ 234 } 235 236 for (;;) 237 ia32_pause(); 238 } 239 240 return (1); /* wakeup successfully */ 241} 242 243int 244acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 245 int intr_enabled) 246{ 247 248 if (sleep_result == -1) 249 return (sleep_result); 250 251 if (!intr_enabled) { 252 /* Wakeup MD procedures in interrupt disabled context */ 253 if (sleep_result == 1) { 254 pmap_init_pat(); 255 initializecpu(); 256 PCPU_SET(switchtime, 0); 257 PCPU_SET(switchticks, ticks); 258#ifdef SMP 259 if (!CPU_EMPTY(&suspcpus)) 260 acpi_wakeup_cpus(sc); 261#endif 262 } 263 264#ifdef SMP 265 if (!CPU_EMPTY(&suspcpus)) 266 restart_cpus(suspcpus); 267#endif 268 mca_resume(); 269 intr_resume(); 270 271 AcpiSetFirmwareWakingVector(0); 272 } else { 273 /* Wakeup MD procedures in interrupt enabled context */ 274 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 275 mem_range_softc.mr_op->reinit != NULL) 276 mem_range_softc.mr_op->reinit(&mem_range_softc); 277 } 278 279 return (sleep_result); 280} 281 282static void * 283acpi_alloc_wakeup_handler(void) 284{ 285 void *wakeaddr; 286 int i; 287 288 /* 289 * Specify the region for our wakeup code. We want it in the low 1 MB 290 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 291 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 292 * and ROM area (0xa0000 and above). The temporary page tables must be 293 * page-aligned. 294 */ 295 wakeaddr = contigmalloc((ACPI_PAGETABLES + 1) * PAGE_SIZE, M_DEVBUF, 296 M_WAITOK, 0x500, 0xa0000, PAGE_SIZE, 0ul); 297 if (wakeaddr == NULL) { 298 printf("%s: can't alloc wake memory\n", __func__); 299 return (NULL); 300 } 301 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 302 EVENTHANDLER_PRI_LAST) == NULL) { 303 printf("%s: can't register event handler\n", __func__); 304 contigfree(wakeaddr, (ACPI_PAGETABLES + 1) * PAGE_SIZE, 305 M_DEVBUF); 306 return (NULL); 307 } 308 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 309 for (i = 0; i < mp_ncpus; i++) { 310 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 311#ifdef __amd64__ 312 susppcbs[i]->pcb_fpususpend = alloc_fpusave(M_WAITOK); 313#endif 314 } 315 316 return (wakeaddr); 317} 318 319void 320acpi_install_wakeup_handler(struct acpi_softc *sc) 321{ 322 static void *wakeaddr = NULL; 323#ifdef __amd64__ 324 uint64_t *pt4, *pt3, *pt2; 325 int i; 326#endif 327 328 if (wakeaddr != NULL) 329 return; 330 331 wakeaddr = acpi_alloc_wakeup_handler(); 332 if (wakeaddr == NULL) 333 return; 334 335 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 336 sc->acpi_wakephys = vtophys(wakeaddr); 337 338 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode)); 339 340 /* Patch GDT base address, ljmp targets. */ 341 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 342 WAKECODE_PADDR(sc) + bootgdt); 343 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 344 WAKECODE_PADDR(sc) + wakeup_32); 345#ifdef __amd64__ 346 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, 347 WAKECODE_PADDR(sc) + wakeup_64); 348 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys); 349#endif 350 351 /* Save pointers to some global data. */ 352 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 353#ifndef __amd64__ 354#ifdef PAE 355 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdpt)); 356#else 357 WAKECODE_FIXUP(wakeup_cr3, register_t, vtophys(kernel_pmap->pm_pdir)); 358#endif 359 360#else 361 /* Build temporary page tables below realmode code. */ 362 pt4 = wakeaddr; 363 pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t); 364 pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t); 365 366 /* Create the initial 1GB replicated page tables */ 367 for (i = 0; i < 512; i++) { 368 /* 369 * Each slot of the level 4 pages points 370 * to the same level 3 page 371 */ 372 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE); 373 pt4[i] |= PG_V | PG_RW | PG_U; 374 375 /* 376 * Each slot of the level 3 pages points 377 * to the same level 2 page 378 */ 379 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE)); 380 pt3[i] |= PG_V | PG_RW | PG_U; 381 382 /* The level 2 page slots are mapped with 2MB pages for 1GB. */ 383 pt2[i] = i * (2 * 1024 * 1024); 384 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; 385 } 386#endif 387 388 if (bootverbose) 389 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", 390 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); 391} 392