diff options
Diffstat (limited to 'sys/i386/acpica/acpi_wakeup.c')
| -rw-r--r-- | sys/i386/acpica/acpi_wakeup.c | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/sys/i386/acpica/acpi_wakeup.c b/sys/i386/acpica/acpi_wakeup.c new file mode 100644 index 000000000000..682e9613962f --- /dev/null +++ b/sys/i386/acpica/acpi_wakeup.c @@ -0,0 +1,391 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2001 Takanori Watanabe <takawata@jp.freebsd.org> + * Copyright (c) 2001-2012 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> + * Copyright (c) 2003 Peter Wemm + * Copyright (c) 2008-2012 Jung-uk Kim <jkim@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_apic.h" + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/eventhandler.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/memrange.h> +#include <sys/smp.h> +#include <sys/systm.h> +#include <sys/cons.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <machine/clock.h> +#include <machine/cpu.h> +#include <machine/intr_machdep.h> +#include <machine/md_var.h> +#include <x86/mca.h> +#include <machine/pcb.h> +#include <machine/specialreg.h> +#include <x86/ucode.h> + +#ifdef DEV_APIC +#include <x86/apicreg.h> +#include <x86/apicvar.h> +#endif +#ifdef SMP +#include <machine/smp.h> +#include <machine/vmparam.h> +#endif + +#include <contrib/dev/acpica/include/acpi.h> + +#include <dev/acpica/acpivar.h> + +#include "acpi_wakecode.h" +#include "acpi_wakedata.h" + +/* Make sure the code is less than a page and leave room for the stack. */ +CTASSERT(sizeof(wakecode) < PAGE_SIZE - 1024); + +extern int acpi_resume_beep; +extern int acpi_reset_video; +extern int acpi_susp_bounce; + +#ifdef SMP +extern struct susppcb **susppcbs; +static cpuset_t suspcpus; +#else +static struct susppcb **susppcbs; +#endif + +static void *acpi_alloc_wakeup_handler(void **); +static void acpi_stop_beep(void *); + +#ifdef SMP +static int acpi_wakeup_ap(struct acpi_softc *, int); +static void acpi_wakeup_cpus(struct acpi_softc *); +#endif + +#define ACPI_WAKEPAGES 1 + +#define WAKECODE_FIXUP(offset, type, val) do { \ + type *addr; \ + addr = (type *)(sc->acpi_wakeaddr + (offset)); \ + *addr = val; \ +} while (0) + +static void +acpi_stop_beep(void *arg) +{ + + if (acpi_resume_beep != 0) + timer_spkr_release(); +} + +#ifdef SMP +static int +acpi_wakeup_ap(struct acpi_softc *sc, int cpu) +{ + struct pcb *pcb; + int vector = (sc->acpi_wakephys >> 12) & 0xff; + int apic_id = cpu_apic_ids[cpu]; + int ms; + + pcb = &susppcbs[cpu]->sp_pcb; + WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); + WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); + WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); + + ipi_startup(apic_id, vector); + + /* Wait up to 5 seconds for it to resume. */ + for (ms = 0; ms < 5000; ms++) { + if (!CPU_ISSET(cpu, &suspended_cpus)) + return (1); /* return SUCCESS */ + DELAY(1000); + } + return (0); /* return FAILURE */ +} + +#define WARMBOOT_TARGET 0 +#define WARMBOOT_OFF (PMAP_MAP_LOW + 0x0467) +#define WARMBOOT_SEG (PMAP_MAP_LOW + 0x0469) + +#define CMOS_REG (0x70) +#define CMOS_DATA (0x71) +#define BIOS_RESET (0x0f) +#define BIOS_WARM (0x0a) + +static void +acpi_wakeup_cpus(struct acpi_softc *sc) +{ + uint32_t mpbioswarmvec; + int cpu; + u_char mpbiosreason; + + /* save the current value of the warm-start vector */ + mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF); + outb(CMOS_REG, BIOS_RESET); + mpbiosreason = inb(CMOS_DATA); + + /* setup a vector to our boot code */ + *((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET; + *((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4; + outb(CMOS_REG, BIOS_RESET); + outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ + + /* Wake up each AP. */ + for (cpu = 1; cpu < mp_ncpus; cpu++) { + if (!CPU_ISSET(cpu, &suspcpus)) + continue; + if (acpi_wakeup_ap(sc, cpu) == 0) { + /* restore the warmstart vector */ + *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; + panic("acpi_wakeup: failed to resume AP #%d (PHY #%d)", + cpu, cpu_apic_ids[cpu]); + } + } + + /* + * Remove the identity mapping of low memory for all CPUs and sync + * the TLB for the BSP. The APs are now spinning in + * cpususpend_handler() and we will release them soon. Then each + * will invalidate its TLB. + */ + pmap_remap_lowptdi(false); + + /* restore the warmstart vector */ + *(uint32_t *)WARMBOOT_OFF = mpbioswarmvec; + + outb(CMOS_REG, BIOS_RESET); + outb(CMOS_DATA, mpbiosreason); +} +#endif + +int +acpi_sleep_machdep(struct acpi_softc *sc, int state) +{ + ACPI_STATUS status; + struct pcb *pcb; + + if (sc->acpi_wakeaddr == 0ul) + return (-1); /* couldn't alloc wake memory */ + +#ifdef SMP + suspcpus = all_cpus; + CPU_CLR(PCPU_GET(cpuid), &suspcpus); +#endif + + if (acpi_resume_beep != 0) + timer_spkr_acquire(); + + AcpiSetFirmwareWakingVector(sc->acpi_wakephys, 0); + + intr_suspend(); + + pcb = &susppcbs[0]->sp_pcb; + if (savectx(pcb)) { + npxsuspend(susppcbs[0]->sp_fpususpend); +#ifdef SMP + if (!CPU_EMPTY(&suspcpus) && suspend_cpus(suspcpus) == 0) { + device_printf(sc->acpi_dev, "Failed to suspend APs\n"); + return (0); /* couldn't sleep */ + } +#endif + + WAKECODE_FIXUP(resume_beep, uint8_t, (acpi_resume_beep != 0)); + WAKECODE_FIXUP(reset_video, uint8_t, (acpi_reset_video != 0)); + + if ((amd_feature & AMDID_NX) != 0) + WAKECODE_FIXUP(wakeup_efer, uint64_t, rdmsr(MSR_EFER)); + WAKECODE_FIXUP(wakeup_cr4, register_t, pcb->pcb_cr4); + WAKECODE_FIXUP(wakeup_pcb, struct pcb *, pcb); + WAKECODE_FIXUP(wakeup_gdt, uint16_t, pcb->pcb_gdt.rd_limit); + WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t, pcb->pcb_gdt.rd_base); + + /* + * Map some low memory with virt == phys for ACPI wakecode + * to use to jump to high memory after enabling paging. This + * is the same as for similar jump in locore, except the + * jump is a single instruction, and we know its address + * more precisely so only need a single PTD, and we have to + * be careful to use the kernel map (PTD[0] is for curthread + * which may be a user thread in deprecated APIs). + */ + pmap_remap_lowptdi(true); + + /* Call ACPICA to enter the desired sleep state */ + if (state == ACPI_STATE_S4 && sc->acpi_s4bios) + status = AcpiEnterSleepStateS4bios(); + else + status = AcpiEnterSleepState(state); + if (ACPI_FAILURE(status)) { + device_printf(sc->acpi_dev, + "AcpiEnterSleepState failed - %s\n", + AcpiFormatException(status)); + return (0); /* couldn't sleep */ + } + + if (acpi_susp_bounce) + resumectx(pcb); + + for (;;) + ia32_pause(); + } else { + /* + * Re-initialize console hardware as soon as possibe. + * No console output (e.g. printf) is allowed before + * this point. + */ + cnresume(); + npxresume(susppcbs[0]->sp_fpususpend); + } + + return (1); /* wakeup successfully */ +} + +int +acpi_wakeup_machdep(struct acpi_softc *sc, int state, int sleep_result, + int intr_enabled) +{ + + if (sleep_result == -1) + return (sleep_result); + + if (!intr_enabled) { + /* Wakeup MD procedures in interrupt disabled context */ + if (sleep_result == 1) { + ucode_reload(); + pmap_init_pat(); + initializecpu(); + PCPU_SET(switchtime, 0); + PCPU_SET(switchticks, ticks); +#ifdef DEV_APIC + lapic_xapic_mode(); +#endif +#ifdef SMP + if (!CPU_EMPTY(&suspcpus)) + acpi_wakeup_cpus(sc); +#endif + } + +#ifdef SMP + if (!CPU_EMPTY(&suspcpus)) + resume_cpus(suspcpus); +#endif + mca_resume(); + intr_resume(/*suspend_cancelled*/false); + + AcpiSetFirmwareWakingVector(0, 0); + } else { + /* Wakeup MD procedures in interrupt enabled context */ + if (sleep_result == 1 && mem_range_softc.mr_op != NULL && + mem_range_softc.mr_op->reinit != NULL) + mem_range_softc.mr_op->reinit(&mem_range_softc); + } + + return (sleep_result); +} + +static void * +acpi_alloc_wakeup_handler(void *wakepages[ACPI_WAKEPAGES]) +{ + int i; + + memset(wakepages, 0, ACPI_WAKEPAGES * sizeof(*wakepages)); + + /* + * Specify the region for our wakeup code. We want it in the low 1 MB + * region, excluding real mode IVT (0-0x3ff), BDA (0x400-0x4ff), EBDA + * (less than 128KB, below 0xa0000, must be excluded by SMAP and DSDT), + * and ROM area (0xa0000 and above). The temporary page tables must be + * page-aligned. + */ + for (i = 0; i < ACPI_WAKEPAGES; i++) { + wakepages[i] = contigmalloc(PAGE_SIZE, M_DEVBUF, + M_NOWAIT | M_EXEC, 0x500, 0xa0000, PAGE_SIZE, 0ul); + if (wakepages[i] == NULL) { + printf("%s: can't alloc wake memory\n", __func__); + goto freepages; + } + } + if (EVENTHANDLER_REGISTER(power_resume, acpi_stop_beep, NULL, + EVENTHANDLER_PRI_LAST) == NULL) { + printf("%s: can't register event handler\n", __func__); + goto freepages; + } + susppcbs = malloc(mp_ncpus * sizeof(*susppcbs), M_DEVBUF, M_WAITOK); + for (i = 0; i < mp_ncpus; i++) { + susppcbs[i] = malloc(sizeof(**susppcbs), M_DEVBUF, M_WAITOK); + susppcbs[i]->sp_fpususpend = alloc_fpusave(M_WAITOK); + } + + return (wakepages); + +freepages: + for (i = 0; i < ACPI_WAKEPAGES; i++) + if (wakepages[i] != NULL) + contigfree(wakepages[i], PAGE_SIZE, M_DEVBUF); + return (NULL); +} + +void +acpi_install_wakeup_handler(struct acpi_softc *sc) +{ + static void *wakeaddr; + void *wakepages[ACPI_WAKEPAGES]; + + if (wakeaddr != NULL) + return; + + if (acpi_alloc_wakeup_handler(wakepages) == NULL) + return; + + wakeaddr = wakepages[0]; + sc->acpi_wakeaddr = (vm_offset_t)wakeaddr; + sc->acpi_wakephys = vtophys(wakeaddr); + + bcopy(wakecode, (void *)sc->acpi_wakeaddr, sizeof(wakecode)); + + /* Patch GDT base address, ljmp targets. */ + WAKECODE_FIXUP((bootgdtdesc + 2), uint32_t, + sc->acpi_wakephys + bootgdt); + WAKECODE_FIXUP((wakeup_sw32 + 2), uint32_t, + sc->acpi_wakephys + wakeup_32); + + /* Save pointers to some global data. */ + WAKECODE_FIXUP(wakeup_ret, void *, resumectx); + WAKECODE_FIXUP(wakeup_cr3, register_t, pmap_get_kcr3()); + + if (bootverbose) + device_printf(sc->acpi_dev, "wakeup code va %#jx pa %#jx\n", + (uintmax_t)sc->acpi_wakeaddr, (uintmax_t)sc->acpi_wakephys); +} |