Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/amd64/acpica/acpi_wakeup.c
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1 /*- 2 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2001 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("$FreeBSD$"); 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. */ 66 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 67 68 extern int acpi_resume_beep; 69 extern int acpi_reset_video; 70 71 #ifdef SMP 72 extern struct pcb **susppcbs; 73 extern void **suspfpusave; 74 #else 75 static struct pcb **susppcbs; 76 static void **suspfpusave; 77 #endif 78 79 #ifdef SMP 80 static cpuset_t suspcpus; 81 #endif 82 83 int acpi_restorecpu(uint64_t, vm_offset_t); 84 85 static void *acpi_alloc_wakeup_handler(void); 86 static void acpi_stop_beep(void *); 87 88 #ifdef SMP 89 static int acpi_wakeup_ap(struct acpi_softc *, int); 90 static void acpi_wakeup_cpus(struct acpi_softc *, const cpuset_t *); 91 #endif 92 93 #define WAKECODE_VADDR(sc) ((sc)->acpi_wakeaddr + (3 * PAGE_SIZE)) 94 #define WAKECODE_PADDR(sc) ((sc)->acpi_wakephys + (3 * PAGE_SIZE)) 95 #define WAKECODE_FIXUP(offset, type, val) do { \ 96 type *addr; \ 97 addr = (type *)(WAKECODE_VADDR(sc) + offset); \ 98 *addr = val; \ 99 } while (0) 100 101 static void 102 acpi_stop_beep(void *arg) 103 { 104 105 if (acpi_resume_beep != 0) 106 timer_spkr_release(); 107 } 108 109 #ifdef SMP 110 static int 111 acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 112 { 113 int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff; 114 int apic_id = cpu_apic_ids[cpu]; 115 int ms; 116 117 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[cpu]); 118 WAKECODE_FIXUP(wakeup_fpusave, void *, suspfpusave[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 WAKECODE_FIXUP(wakeup_cpu, int, cpu); 123 124 /* do an INIT IPI: assert RESET */ 125 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE | 126 APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id); 127 128 /* wait for pending status end */ 129 lapic_ipi_wait(-1); 130 131 /* do an INIT IPI: deassert RESET */ 132 lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL | 133 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0); 134 135 /* wait for pending status end */ 136 DELAY(10000); /* wait ~10mS */ 137 lapic_ipi_wait(-1); 138 139 /* 140 * next we do a STARTUP IPI: the previous INIT IPI might still be 141 * latched, (P5 bug) this 1st STARTUP would then terminate 142 * immediately, and the previously started INIT IPI would continue. OR 143 * the previous INIT IPI has already run. and this STARTUP IPI will 144 * run. OR the previous INIT IPI was ignored. and this STARTUP IPI 145 * will run. 146 */ 147 148 /* do a STARTUP IPI */ 149 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE | 150 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP | 151 vector, apic_id); 152 lapic_ipi_wait(-1); 153 DELAY(200); /* wait ~200uS */ 154 155 /* 156 * finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF 157 * the previous STARTUP IPI was cancelled by a latched INIT IPI. OR 158 * this STARTUP IPI will be ignored, as only ONE STARTUP IPI is 159 * recognized after hardware RESET or INIT IPI. 160 */ 161 162 lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE | 163 APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP | 164 vector, apic_id); 165 lapic_ipi_wait(-1); 166 DELAY(200); /* wait ~200uS */ 167 168 /* Wait up to 5 seconds for it to start. */ 169 for (ms = 0; ms < 5000; ms++) { 170 if (*(int *)(WAKECODE_VADDR(sc) + wakeup_cpu) == 0) 171 return (1); /* return SUCCESS */ 172 DELAY(1000); 173 } 174 return (0); /* return FAILURE */ 175 } 176 177 #define WARMBOOT_TARGET 0 178 #define WARMBOOT_OFF (KERNBASE + 0x0467) 179 #define WARMBOOT_SEG (KERNBASE + 0x0469) 180 181 #define CMOS_REG (0x70) 182 #define CMOS_DATA (0x71) 183 #define BIOS_RESET (0x0f) 184 #define BIOS_WARM (0x0a) 185 186 static void 187 acpi_wakeup_cpus(struct acpi_softc *sc, const cpuset_t *wakeup_cpus) 188 { 189 uint32_t mpbioswarmvec; 190 int cpu; 191 u_char mpbiosreason; 192 193 /* save the current value of the warm-start vector */ 194 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); 195 outb(CMOS_REG, BIOS_RESET); 196 mpbiosreason = inb(CMOS_DATA); 197 198 /* setup a vector to our boot code */ 199 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; 200 *((volatile u_short *)WARMBOOT_SEG) = WAKECODE_PADDR(sc) >> 4; 201 outb(CMOS_REG, BIOS_RESET); 202 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ 203 204 /* Wake up each AP. */ 205 for (cpu = 1; cpu < mp_ncpus; cpu++) { 206 if (!CPU_ISSET(cpu, wakeup_cpus)) 207 continue; 208 if (acpi_wakeup_ap(sc, cpu) == 0) { 209 /* restore the warmstart vector */ 210 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 211 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", 212 cpu, cpu_apic_ids[cpu]); 213 } 214 } 215 216 /* restore the warmstart vector */ 217 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 218 219 outb(CMOS_REG, BIOS_RESET); 220 outb(CMOS_DATA, mpbiosreason); 221 } 222 #endif 223 224 int 225 acpi_sleep_machdep(struct acpi_softc *sc, int state) 226 { 227 ACPI_STATUS status; 228 229 if (sc->acpi_wakeaddr == 0ul) 230 return (-1); /* couldn't alloc wake memory */ 231 232 #ifdef SMP 233 suspcpus = all_cpus; 234 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 235 #endif 236 237 if (acpi_resume_beep != 0) 238 timer_spkr_acquire(); 239 240 AcpiSetFirmwareWakingVector(WAKECODE_PADDR(sc)); 241 242 intr_suspend(); 243 244 if (savectx(susppcbs[0])) { 245 fpususpend(suspfpusave[0]); 246 #ifdef SMP 247 if (!CPU_EMPTY(&suspcpus) && 248 suspend_cpus(suspcpus) == 0) { 249 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 250 return (0); /* couldn't sleep */ 251 } 252 #endif 253 254 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 255 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 256 257 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, susppcbs[0]); 258 WAKECODE_FIXUP(wakeup_fpusave, void *, suspfpusave[0]); 259 WAKECODE_FIXUP(wakeup_gdt, uint16_t, 260 susppcbs[0]->pcb_gdt.rd_limit); 261 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, 262 susppcbs[0]->pcb_gdt.rd_base); 263 WAKECODE_FIXUP(wakeup_cpu, int, 0); 264 265 /* Call ACPICA to enter the desired sleep state */ 266 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 267 status = AcpiEnterSleepStateS4bios(); 268 else 269 status = AcpiEnterSleepState(state); 270 271 if (status != AE_OK) { 272 device_printf(sc->acpi_dev, 273 "AcpiEnterSleepState failed - %s\n", 274 AcpiFormatException(status)); 275 return (0); /* couldn't sleep */ 276 } 277 278 for (;;) 279 ia32_pause(); 280 } 281 282 return (1); /* wakeup successfully */ 283 } 284 285 int 286 acpi_wakeup_machdep(struct acpi_softc *sc, int state, 287 int sleep_result, int intr_enabled) 288 { 289 290 if (sleep_result == -1) 291 return (sleep_result); 292 293 if (intr_enabled == 0) { 294 /* Wakeup MD procedures in interrupt disabled context */ 295 if (sleep_result == 1) { 296 pmap_init_pat(); 297 load_cr3(susppcbs[0]->pcb_cr3); 298 initializecpu(); 299 PCPU_SET(switchtime, 0); 300 PCPU_SET(switchticks, ticks); 301 #ifdef SMP 302 if (!CPU_EMPTY(&suspcpus)) 303 acpi_wakeup_cpus(sc, &suspcpus); 304 #endif 305 } 306 307 #ifdef SMP 308 if (!CPU_EMPTY(&suspcpus)) 309 restart_cpus(suspcpus); 310 #endif 311 mca_resume(); 312 intr_resume(); 313 } else { 314 /* Wakeup MD procedures in interrupt enabled context */ 315 AcpiSetFirmwareWakingVector(0); 316 317 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 318 mem_range_softc.mr_op->reinit != NULL) 319 mem_range_softc.mr_op->reinit(&mem_range_softc); 320 } 321 322 return (sleep_result); 323 } 324 325 static void * 326 acpi_alloc_wakeup_handler(void) 327 { 328 void *wakeaddr; 329 int i; 330 331 /* 332 * Specify the region for our wakeup code. We want it in the low 1 MB 333 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 334 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 335 * and ROM area (0xa0000 and above). The temporary page tables must be 336 * page-aligned. 337 */ 338 wakeaddr = contigmalloc(4 * PAGE_SIZE, M_DEVBUF, M_WAITOK, 0x500, 339 0xa0000, PAGE_SIZE, 0ul); 340 if (wakeaddr == NULL) { 341 printf("%s: can't alloc wake memory\n", __func__); 342 return (NULL); 343 } 344 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 345 EVENTHANDLER_PRI_LAST) == NULL) { 346 printf("%s: can't register event handler\n", __func__); 347 contigfree(wakeaddr, 4 * PAGE_SIZE, M_DEVBUF); 348 return (NULL); 349 } 350 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 351 suspfpusave = malloc(mp_ncpus * sizeof(void *), M_DEVBUF, M_WAITOK); 352 for (i = 0; i < mp_ncpus; i++) { 353 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 354 suspfpusave[i] = alloc_fpusave(M_WAITOK); 355 } 356 357 return (wakeaddr); 358 } 359 360 void 361 acpi_install_wakeup_handler(struct acpi_softc *sc) 362 { 363 static void *wakeaddr = NULL; 364 uint64_t *pt4, *pt3, *pt2; 365 int i; 366 367 if (wakeaddr != NULL) 368 return; 369 370 wakeaddr = acpi_alloc_wakeup_handler(); 371 if (wakeaddr == NULL) 372 return; 373 374 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 375 sc->acpi_wakephys = vtophys(wakeaddr); 376 377 bcopy(wakecode, (void *)WAKECODE_VADDR(sc), sizeof(wakecode)); 378 379 /* Patch GDT base address, ljmp targets and page table base address. */ 380 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 381 WAKECODE_PADDR(sc) + bootgdt); 382 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 383 WAKECODE_PADDR(sc) + wakeup_32); 384 WAKECODE_FIXUP((wakeup_sw64 + 1), uint32_t, 385 WAKECODE_PADDR(sc) + wakeup_64); 386 WAKECODE_FIXUP(wakeup_pagetables, uint32_t, sc->acpi_wakephys); 387 388 /* Save pointers to some global data. */ 389 WAKECODE_FIXUP(wakeup_retaddr, void *, acpi_restorecpu); 390 WAKECODE_FIXUP(wakeup_kpml4, uint64_t, KPML4phys); 391 WAKECODE_FIXUP(wakeup_ctx, vm_offset_t, 392 WAKECODE_VADDR(sc) + wakeup_ctx); 393 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER)); 394 WAKECODE_FIXUP(wakeup_star, uint64_t, rdmsr(MSR_STAR)); 395 WAKECODE_FIXUP(wakeup_lstar, uint64_t, rdmsr(MSR_LSTAR)); 396 WAKECODE_FIXUP(wakeup_cstar, uint64_t, rdmsr(MSR_CSTAR)); 397 WAKECODE_FIXUP(wakeup_sfmask, uint64_t, rdmsr(MSR_SF_MASK)); 398 WAKECODE_FIXUP(wakeup_xsmask, uint64_t, xsave_mask); 399 400 /* Build temporary page tables below realmode code. */ 401 pt4 = wakeaddr; 402 pt3 = pt4 + (PAGE_SIZE) / sizeof(uint64_t); 403 pt2 = pt3 + (PAGE_SIZE) / sizeof(uint64_t); 404 405 /* Create the initial 1GB replicated page tables */ 406 for (i = 0; i < 512; i++) { 407 /* 408 * Each slot of the level 4 pages points 409 * to the same level 3 page 410 */ 411 pt4[i] = (uint64_t)(sc->acpi_wakephys + PAGE_SIZE); 412 pt4[i] |= PG_V | PG_RW | PG_U; 413 414 /* 415 * Each slot of the level 3 pages points 416 * to the same level 2 page 417 */ 418 pt3[i] = (uint64_t)(sc->acpi_wakephys + (2 * PAGE_SIZE)); 419 pt3[i] |= PG_V | PG_RW | PG_U; 420 421 /* The level 2 page slots are mapped with 2MB pages for 1GB. */ 422 pt2[i] = i * (2 * 1024 * 1024); 423 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; 424 } 425 426 if (bootverbose) 427 device_printf(sc->acpi_dev, "wakeup code va %p pa %p\n", 428 (void *)sc->acpi_wakeaddr, (void *)sc->acpi_wakephys); 429 }
Cache object: 04114042acd0bbe52b166614498db4a0
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