1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include "opt_apic.h" 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/eventhandler.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/memrange.h> 41 #include <sys/smp.h> 42 #include <sys/systm.h> 43 #include <sys/cons.h> 44 45 #include <vm/vm.h> 46 #include <vm/pmap.h> 47 48 #include <machine/clock.h> 49 #include <machine/cpu.h> 50 #include <machine/intr_machdep.h> 51 #include <machine/md_var.h> 52 #include <x86/mca.h> 53 #include <machine/pcb.h> 54 #include <machine/specialreg.h> 55 #include <x86/ucode.h> 56 57 #ifdef DEV_APIC 58 #include <x86/apicreg.h> 59 #include <x86/apicvar.h> 60 #endif 61 #ifdef SMP 62 #include <machine/smp.h> 63 #include <machine/vmparam.h> 64 #endif 65 66 #include <contrib/dev/acpica/include/acpi.h> 67 68 #include <dev/acpica/acpivar.h> 69 70 #include "acpi_wakecode.h" 71 #include "acpi_wakedata.h" 72 73 /* Make sure the code is less than a page and leave room for the stack. */ 74 CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); 75 76 extern int acpi_resume_beep; 77 extern int acpi_reset_video; 78 extern int acpi_susp_bounce; 79 80 #ifdef SMP 81 extern struct susppcb **susppcbs; 82 static cpuset_t suspcpus; 83 #else 84 static struct susppcb **susppcbs; 85 #endif 86 87 static void acpi_stop_beep(void *); 88 89 #ifdef SMP 90 static int acpi_wakeup_ap(struct acpi_softc *, int); 91 static void acpi_wakeup_cpus(struct acpi_softc *); 92 #endif 93 94 #define ACPI_WAKEPAGES 1 95 96 #define WAKECODE_FIXUP(offset, type, val) do { \ 97 type *addr; \ 98 addr = (type *)(sc->acpi_wakeaddr + (offset)); \ 99 *addr = val; \ 100 } while (0) 101 102 static void 103 acpi_stop_beep(void *arg) 104 { 105 106 if (acpi_resume_beep != 0) 107 timer_spkr_release(); 108 } 109 110 #ifdef SMP 111 static int 112 acpi_wakeup_ap(struct acpi_softc *sc, int cpu) 113 { 114 struct pcb *pcb; 115 int vector = (sc->acpi_wakephys >> 12) & 0xff; 116 int apic_id = cpu_apic_ids[cpu]; 117 int ms; 118 119 pcb = &susppcbs[cpu]->sp_pcb; 120 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 121 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 122 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 123 124 ipi_startup(apic_id, vector); 125 126 /* Wait up to 5 seconds for it to resume. */ 127 for (ms = 0; ms < 5000; ms++) { 128 if (!CPU_ISSET(cpu, &suspended_cpus)) 129 return (1); /* return SUCCESS */ 130 DELAY(1000); 131 } 132 return (0); /* return FAILURE */ 133 } 134 135 #define WARMBOOT_TARGET 0 136 #define WARMBOOT_OFF (PMAP_MAP_LOW + 0x0467) 137 #define WARMBOOT_SEG (PMAP_MAP_LOW + 0x0469) 138 139 #define CMOS_REG (0x70) 140 #define CMOS_DATA (0x71) 141 #define BIOS_RESET (0x0f) 142 #define BIOS_WARM (0x0a) 143 144 static void 145 acpi_wakeup_cpus(struct acpi_softc *sc) 146 { 147 uint32_t mpbioswarmvec; 148 int cpu; 149 u_char mpbiosreason; 150 151 /* save the current value of the warm-start vector */ 152 mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); 153 outb(CMOS_REG, BIOS_RESET); 154 mpbiosreason = inb(CMOS_DATA); 155 156 /* setup a vector to our boot code */ 157 *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; 158 *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4; 159 outb(CMOS_REG, BIOS_RESET); 160 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ 161 162 /* Wake up each AP. */ 163 for (cpu = 1; cpu < mp_ncpus; cpu++) { 164 if (!CPU_ISSET(cpu, &suspcpus)) 165 continue; 166 if (acpi_wakeup_ap(sc, cpu) == 0) { 167 /* restore the warmstart vector */ 168 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 169 panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", 170 cpu, cpu_apic_ids[cpu]); 171 } 172 } 173 174 /* 175 * Remove the identity mapping of low memory for all CPUs and sync 176 * the TLB for the BSP. The APs are now spinning in 177 * cpususpend_handler() and we will release them soon. Then each 178 * will invalidate its TLB. 179 */ 180 pmap_remap_lowptdi(false); 181 182 /* restore the warmstart vector */ 183 *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; 184 185 outb(CMOS_REG, BIOS_RESET); 186 outb(CMOS_DATA, mpbiosreason); 187 } 188 #endif 189 190 int 191 acpi_sleep_machdep(struct acpi_softc *sc, int state) 192 { 193 ACPI_STATUS status; 194 struct pcb *pcb; 195 196 if (sc->acpi_wakeaddr == 0ul) 197 return (-1); /* couldn't alloc wake memory */ 198 199 #ifdef SMP 200 suspcpus = all_cpus; 201 CPU_CLR(PCPU_GET(cpuid), &suspcpus); 202 #endif 203 204 if (acpi_resume_beep != 0) 205 timer_spkr_acquire(); 206 207 AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0); 208 209 intr_suspend(); 210 211 pcb = &susppcbs[0]->sp_pcb; 212 if (savectx(pcb)) { 213 npxsuspend(susppcbs[0]->sp_fpususpend); 214 #ifdef SMP 215 if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { 216 device_printf(sc->acpi_dev, "Failed to suspend APs\n"); 217 return (0); /* couldn't sleep */ 218 } 219 #endif 220 221 WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); 222 WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); 223 224 if ((amd_feature & AMDID_NX) != 0) 225 WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER)); 226 WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); 227 WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); 228 WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); 229 WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); 230 231 /* 232 * Map some low memory with virt == phys for ACPI wakecode 233 * to use to jump to high memory after enabling paging. This 234 * is the same as for similar jump in locore, except the 235 * jump is a single instruction, and we know its address 236 * more precisely so only need a single PTD, and we have to 237 * be careful to use the kernel map (PTD[0] is for curthread 238 * which may be a user thread in deprecated APIs). 239 */ 240 pmap_remap_lowptdi(true); 241 242 /* Call ACPICA to enter the desired sleep state */ 243 if (state == ACPI_STATE_S4 && sc->acpi_s4bios) 244 status = AcpiEnterSleepStateS4bios(); 245 else 246 status = AcpiEnterSleepState(state); 247 if (ACPI_FAILURE(status)) { 248 device_printf(sc->acpi_dev, 249 "AcpiEnterSleepState failed - %s\n", 250 AcpiFormatException(status)); 251 return (0); /* couldn't sleep */ 252 } 253 254 if (acpi_susp_bounce) 255 resumectx(pcb); 256 257 for (;;) 258 ia32_pause(); 259 } else { 260 /* 261 * Re-initialize console hardware as soon as possibe. 262 * No console output (e.g. printf) is allowed before 263 * this point. 264 */ 265 cnresume(); 266 npxresume(susppcbs[0]->sp_fpususpend); 267 } 268 269 return (1); /* wakeup successfully */ 270 } 271 272 int 273 acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, 274 int intr_enabled) 275 { 276 277 if (sleep_result == -1) 278 return (sleep_result); 279 280 if (!intr_enabled) { 281 /* Wakeup MD procedures in interrupt disabled context */ 282 if (sleep_result == 1) { 283 ucode_reload(); 284 pmap_init_pat(); 285 initializecpu(); 286 PCPU_SET(switchtime, 0); 287 PCPU_SET(switchticks, ticks); 288 #ifdef DEV_APIC 289 lapic_xapic_mode(); 290 #endif 291 #ifdef SMP 292 if (!CPU_EMPTY(&suspcpus)) 293 acpi_wakeup_cpus(sc); 294 #endif 295 } 296 297 #ifdef SMP 298 if (!CPU_EMPTY(&suspcpus)) 299 resume_cpus(suspcpus); 300 #endif 301 mca_resume(); 302 intr_resume(/*suspend_cancelled*/false); 303 304 AcpiSetFirmwareWakingVector(0, 0); 305 } else { 306 /* Wakeup MD procedures in interrupt enabled context */ 307 if (sleep_result == 1 && mem_range_softc.mr_op != NULL && 308 mem_range_softc.mr_op->reinit != NULL) 309 mem_range_softc.mr_op->reinit(&mem_range_softc); 310 } 311 312 return (sleep_result); 313 } 314 315 static void * 316 acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES]) 317 { 318 int i; 319 320 memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages)); 321 322 /* 323 * Specify the region for our wakeup code. We want it in the low 1 MB 324 * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA 325 * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), 326 * and ROM area (0xa0000 and above). The temporary page tables must be 327 * page-aligned. 328 */ 329 for (i = 0; i < ACPI_WAKEPAGES; i++) { 330 wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, 331 M_NOWAIT | M_EXEC, 0x500, 0xa0000, PAGE_SIZE, 0ul); 332 if (wakepages[i] == NULL) { 333 printf("%s: can't alloc wake memory\n", __func__); 334 goto freepages; 335 } 336 } 337 if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, 338 EVENTHANDLER_PRI_LAST) == NULL) { 339 printf("%s: can't register event handler\n", __func__); 340 goto freepages; 341 } 342 susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); 343 for (i = 0; i < mp_ncpus; i++) { 344 susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); 345 susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); 346 } 347 348 return (wakepages); 349 350 freepages: 351 for (i = 0; i < ACPI_WAKEPAGES; i++) 352 free(wakepages[i], M_DEVBUF); 353 return (NULL); 354 } 355 356 void 357 acpi_install_wakeup_handler(struct acpi_softc *sc) 358 { 359 static void *wakeaddr; 360 void *wakepages[ACPI_WAKEPAGES]; 361 362 if (wakeaddr != NULL) 363 return; 364 365 if (acpi_alloc_wakeup_handler(wakepages) == NULL) 366 return; 367 368 wakeaddr = wakepages[0]; 369 sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; 370 sc->acpi_wakephys = vtophys(wakeaddr); 371 372 bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); 373 374 /* Patch GDT base address, ljmp targets. */ 375 WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, 376 sc->acpi_wakephys + bootgdt); 377 WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, 378 sc->acpi_wakephys + wakeup_32); 379 380 /* Save pointers to some global data. */ 381 WAKECODE_FIXUP(wakeup_ret, void *, resumectx); 382 WAKECODE_FIXUP(wakeup_cr3, register_t, pmap_get_kcr3()); 383 384 if (bootverbose) 385 device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", 386 (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); 387 } 388