Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/acpi_wakeup.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> 5 * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 6 * Copyright (c) 2003 Peter Wemm 7 * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org> 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_apic.h" 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 #include <sys/cons.h> 46 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 50 #include <machine/clock.h> 51 #include <machine/cpu.h> 52 #include <machine/intr_machdep.h> 53 #include <machine/md_var.h> 54 #include <x86/mca.h> 55 #include <machine/pcb.h> 56 #include <machine/specialreg.h> 57 #include <x86/ucode.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 extern int acpi_susp_bounce; 81 82 #ifdef SMP 83 extern struct susppcb **susppcbs; 84 static cpuset_t suspcpus; 85 #else 86 static struct susppcb **susppcbs; 87 #endif 88 89 static void *acpi_alloc_wakeup_handler(void **); 90 static void acpi_stop_beep(void *); 91 92 #ifdef SMP 93 static int acpi_wakeup_ap(struct acpi_softc *, int); 94 static void acpi_wakeup_cpus(struct acpi_softc *); 95 #endif 96 97 #define ACPI_WAKEPAGES 1 98 99 #define WAKECODE_FIXUP(offset, type, val) do { \ 100 type *addr; \ 101 addr = (type *)(sc->acpi_wakeaddr + (offset)); \ 102 *addr = val; \ 103 } while (0) 104 105 static void 106 acpi_stop_beep(void *arg) 107 { 108 109 if (acpi_resume_beep != 0) 110 timer_spkr_release(); 111 } 112 113 #ifdef SMP 114 static int 115 acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 116 { 117 struct pcb *pcb; 118 int vector = (sc->acpi_wakephys >> 12) & 0xff; 119 int apic_id = cpu_apic_ids[cpu]; 120 int ms; 121 122 pcb = &susppcbs[cpu]->sp_pcb; 123 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 124 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 125 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 126 127 ipi_startup(apic_id, vector); 128 129 /* Wait up to 5 seconds for it to resume. */ 130 for (ms = 0; ms < 5000; ms++) { 131 if (!CPU_ISSET(cpu, &suspended_cpus)) 132 return (1); /* return SUCCESS */ 133 DELAY(1000); 134 } 135 return (0); /* return FAILURE */ 136 } 137 138 #define WARMBOOT_TARGET 0 139 #define WARMBOOT_OFF (PMAP_MAP_LOW + 0x0467) 140 #define WARMBOOT_SEG (PMAP_MAP_LOW + 0x0469) 141 142 #define CMOS_REG (0x70) 143 #define CMOS_DATA (0x71) 144 #define BIOS_RESET (0x0f) 145 #define BIOS_WARM (0x0a) 146 147 static void 148 acpi_wakeup_cpus(struct acpi_softc *sc) 149 { 150 uint32_t mpbioswarmvec; 151 int cpu; 152 u_char mpbiosreason; 153 154 /* save the current value of the warm-start vector */ 155 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); 156 outb(CMOS_REG, BIOS_RESET); 157 mpbiosreason = inb(CMOS_DATA); 158 159 /* setup a vector to our boot code */ 160 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; 161 *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4; 162 outb(CMOS_REG, BIOS_RESET); 163 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ 164 165 /* Wake up each AP. */ 166 for (cpu = 1; cpu < mp_ncpus; cpu++) { 167 if (!CPU_ISSET(cpu, &suspcpus)) 168 continue; 169 if (acpi_wakeup_ap(sc, cpu) == 0) { 170 /* restore the warmstart vector */ 171 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 172 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", 173 cpu, cpu_apic_ids[cpu]); 174 } 175 } 176 177 /* 178 * Remove the identity mapping of low memory for all CPUs and sync 179 * the TLB for the BSP. The APs are now spinning in 180 * cpususpend_handler() and we will release them soon. Then each 181 * will invalidate its TLB. 182 */ 183 pmap_remap_lowptdi(false); 184 185 /* restore the warmstart vector */ 186 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 187 188 outb(CMOS_REG, BIOS_RESET); 189 outb(CMOS_DATA, mpbiosreason); 190 } 191 #endif 192 193 int 194 acpi_sleep_machdep(struct acpi_softc *sc, int state) 195 { 196 ACPI_STATUS status; 197 struct pcb *pcb; 198 199 if (sc->acpi_wakeaddr == 0ul) 200 return (-1); /* couldn't alloc wake memory */ 201 202 #ifdef SMP 203 suspcpus = all_cpus; 204 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 205 #endif 206 207 if (acpi_resume_beep != 0) 208 timer_spkr_acquire(); 209 210 AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0); 211 212 intr_suspend(); 213 214 pcb = &susppcbs[0]->sp_pcb; 215 if (savectx(pcb)) { 216 npxsuspend(susppcbs[0]->sp_fpususpend); 217 #ifdef SMP 218 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { 219 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 220 return (0); /* couldn't sleep */ 221 } 222 #endif 223 224 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 225 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 226 227 if ((amd_feature & AMDID_NX) != 0) 228 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER)); 229 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); 230 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 231 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 232 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 233 234 /* 235 * Map some low memory with virt == phys for ACPI wakecode 236 * to use to jump to high memory after enabling paging. This 237 * is the same as for similar jump in locore, except the 238 * jump is a single instruction, and we know its address 239 * more precisely so only need a single PTD, and we have to 240 * be careful to use the kernel map (PTD[0] is for curthread 241 * which may be a user thread in deprecated APIs). 242 */ 243 pmap_remap_lowptdi(true); 244 245 /* Call ACPICA to enter the desired sleep state */ 246 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 247 status = AcpiEnterSleepStateS4bios(); 248 else 249 status = AcpiEnterSleepState(state); 250 if (ACPI_FAILURE(status)) { 251 device_printf(sc->acpi_dev, 252 "AcpiEnterSleepState failed - %s\n", 253 AcpiFormatException(status)); 254 return (0); /* couldn't sleep */ 255 } 256 257 if (acpi_susp_bounce) 258 resumectx(pcb); 259 260 for (;;) 261 ia32_pause(); 262 } else { 263 /* 264 * Re-initialize console hardware as soon as possibe. 265 * No console output (e.g. printf) is allowed before 266 * this point. 267 */ 268 cnresume(); 269 npxresume(susppcbs[0]->sp_fpususpend); 270 } 271 272 return (1); /* wakeup successfully */ 273 } 274 275 int 276 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 277 int intr_enabled) 278 { 279 280 if (sleep_result == -1) 281 return (sleep_result); 282 283 if (!intr_enabled) { 284 /* Wakeup MD procedures in interrupt disabled context */ 285 if (sleep_result == 1) { 286 ucode_reload(); 287 pmap_init_pat(); 288 initializecpu(); 289 PCPU_SET(switchtime, 0); 290 PCPU_SET(switchticks, ticks); 291 #ifdef DEV_APIC 292 lapic_xapic_mode(); 293 #endif 294 #ifdef SMP 295 if (!CPU_EMPTY(&suspcpus)) 296 acpi_wakeup_cpus(sc); 297 #endif 298 } 299 300 #ifdef SMP 301 if (!CPU_EMPTY(&suspcpus)) 302 resume_cpus(suspcpus); 303 #endif 304 mca_resume(); 305 intr_resume(/*suspend_cancelled*/false); 306 307 AcpiSetFirmwareWakingVector(0, 0); 308 } else { 309 /* Wakeup MD procedures in interrupt enabled context */ 310 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 311 mem_range_softc.mr_op->reinit != NULL) 312 mem_range_softc.mr_op->reinit(&mem_range_softc); 313 } 314 315 return (sleep_result); 316 } 317 318 static void * 319 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES]) 320 { 321 int i; 322 323 memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages)); 324 325 /* 326 * Specify the region for our wakeup code. We want it in the low 1 MB 327 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 328 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 329 * and ROM area (0xa0000 and above). The temporary page tables must be 330 * page-aligned. 331 */ 332 for (i = 0; i < ACPI_WAKEPAGES; i++) { 333 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, 334 M_NOWAIT | M_EXEC, 0x500, 0xa0000, PAGE_SIZE, 0ul); 335 if (wakepages[i] == NULL) { 336 printf("%s: can't alloc wake memory\n", __func__); 337 goto freepages; 338 } 339 } 340 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 341 EVENTHANDLER_PRI_LAST) == NULL) { 342 printf("%s: can't register event handler\n", __func__); 343 goto freepages; 344 } 345 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 346 for (i = 0; i < mp_ncpus; i++) { 347 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 348 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); 349 } 350 351 return (wakepages); 352 353 freepages: 354 for (i = 0; i < ACPI_WAKEPAGES; i++) 355 if (wakepages[i] != NULL) 356 contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF); 357 return (NULL); 358 } 359 360 void 361 acpi_install_wakeup_handler(struct acpi_softc *sc) 362 { 363 static void *wakeaddr; 364 void *wakepages[ACPI_WAKEPAGES]; 365 366 if (wakeaddr != NULL) 367 return; 368 369 if (acpi_alloc_wakeup_handler(wakepages) == NULL) 370 return; 371 372 wakeaddr = wakepages[0]; 373 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 374 sc->acpi_wakephys = vtophys(wakeaddr); 375 376 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 377 378 /* Patch GDT base address, ljmp targets. */ 379 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 380 sc->acpi_wakephys + bootgdt); 381 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 382 sc->acpi_wakephys + wakeup_32); 383 384 /* Save pointers to some global data. */ 385 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 386 WAKECODE_FIXUP(wakeup_cr3, register_t, pmap_get_kcr3()); 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 }
Cache object: b1b24756df2da7bd338ce1922f540459
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