f48223fad2
Split a portion of the code in madt_parse_interrupt_override to a separate function, that is public and can be used from other code. This will be needed by the Xen port, since FreeBSD needs to parse the interrupt overrides and notify Xen about them. This commit should not introduce any functional change. Sponsored by: Citrix Systems R&D Reviewed by: jhb, gibbs x86/acpica/madt.c: - Introduce madt_parse_interrupt_values() that parses the intr information from ACPI and returns the triggering and the polarity. This is a subset of the functionality that used to be part of madt_parse_interrupt_override(). - Make madt_found_sci_override a global variable that can be used from other files. x86/include/acpica_machdep.h: - Prototype of madt_parse_interrupt_values. - Extern declaration of madt_found_sci_override.
591 lines
16 KiB
C
591 lines
16 KiB
C
/*-
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* Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <x86/apicreg.h>
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#include <machine/intr_machdep.h>
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#include <x86/apicvar.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/actables.h>
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#include <dev/acpica/acpivar.h>
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#include <dev/pci/pcivar.h>
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/* These two arrays are indexed by APIC IDs. */
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static struct {
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void *io_apic;
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UINT32 io_vector;
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} *ioapics;
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static struct lapic_info {
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u_int la_enabled:1;
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u_int la_acpi_id:8;
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} lapics[MAX_APIC_ID + 1];
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int madt_found_sci_override;
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static ACPI_TABLE_MADT *madt;
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static vm_paddr_t madt_physaddr;
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static vm_offset_t madt_length;
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static MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items");
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static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source);
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static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source);
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static int madt_find_cpu(u_int acpi_id, u_int *apic_id);
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static int madt_find_interrupt(int intr, void **apic, u_int *pin);
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static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg);
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static void madt_parse_interrupt_override(
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ACPI_MADT_INTERRUPT_OVERRIDE *intr);
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static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry,
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void *arg __unused);
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static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi);
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static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi);
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static int madt_probe(void);
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static int madt_probe_cpus(void);
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static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry,
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void *arg __unused);
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static void madt_register(void *dummy);
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static int madt_setup_local(void);
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static int madt_setup_io(void);
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static void madt_walk_table(acpi_subtable_handler *handler, void *arg);
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static struct apic_enumerator madt_enumerator = {
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"MADT",
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madt_probe,
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madt_probe_cpus,
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madt_setup_local,
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madt_setup_io
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};
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/*
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* Look for an ACPI Multiple APIC Description Table ("APIC")
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*/
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static int
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madt_probe(void)
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{
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madt_physaddr = acpi_find_table(ACPI_SIG_MADT);
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if (madt_physaddr == 0)
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return (ENXIO);
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return (-50);
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}
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/*
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* Run through the MP table enumerating CPUs.
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*/
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static int
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madt_probe_cpus(void)
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{
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madt = acpi_map_table(madt_physaddr, ACPI_SIG_MADT);
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madt_length = madt->Header.Length;
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KASSERT(madt != NULL, ("Unable to re-map MADT"));
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madt_walk_table(madt_probe_cpus_handler, NULL);
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acpi_unmap_table(madt);
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madt = NULL;
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return (0);
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}
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/*
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* Initialize the local APIC on the BSP.
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*/
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static int
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madt_setup_local(void)
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{
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madt = pmap_mapbios(madt_physaddr, madt_length);
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lapic_init(madt->Address);
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printf("ACPI APIC Table: <%.*s %.*s>\n",
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(int)sizeof(madt->Header.OemId), madt->Header.OemId,
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(int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId);
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/*
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* We ignore 64-bit local APIC override entries. Should we
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* perhaps emit a warning here if we find one?
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*/
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return (0);
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}
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/*
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* Enumerate I/O APICs and setup interrupt sources.
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*/
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static int
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madt_setup_io(void)
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{
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void *ioapic;
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u_int pin;
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int i;
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/* Try to initialize ACPI so that we can access the FADT. */
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i = acpi_Startup();
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if (ACPI_FAILURE(i)) {
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printf("MADT: ACPI Startup failed with %s\n",
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AcpiFormatException(i));
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printf("Try disabling either ACPI or apic support.\n");
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panic("Using MADT but ACPI doesn't work");
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}
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ioapics = malloc(sizeof(*ioapics) * (MAX_APIC_ID + 1), M_MADT,
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M_WAITOK | M_ZERO);
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/* First, we run through adding I/O APIC's. */
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madt_walk_table(madt_parse_apics, NULL);
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/* Second, we run through the table tweaking interrupt sources. */
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madt_walk_table(madt_parse_ints, NULL);
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/*
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* If there was not an explicit override entry for the SCI,
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* force it to use level trigger and active-low polarity.
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*/
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if (!madt_found_sci_override) {
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if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic,
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&pin) != 0)
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printf("MADT: Could not find APIC for SCI IRQ %u\n",
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AcpiGbl_FADT.SciInterrupt);
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else {
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printf(
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"MADT: Forcing active-low polarity and level trigger for SCI\n");
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ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
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ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
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}
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}
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/* Third, we register all the I/O APIC's. */
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for (i = 0; i <= MAX_APIC_ID; i++)
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if (ioapics[i].io_apic != NULL)
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ioapic_register(ioapics[i].io_apic);
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/* Finally, we throw the switch to enable the I/O APIC's. */
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acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
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free(ioapics, M_MADT);
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ioapics = NULL;
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return (0);
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}
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static void
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madt_register(void *dummy __unused)
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{
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apic_register_enumerator(&madt_enumerator);
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}
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SYSINIT(madt_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, madt_register, NULL);
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/*
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* Call the handler routine for each entry in the MADT table.
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*/
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static void
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madt_walk_table(acpi_subtable_handler *handler, void *arg)
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{
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acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
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handler, arg);
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}
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static void
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madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
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{
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ACPI_MADT_LOCAL_APIC *proc;
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struct lapic_info *la;
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switch (entry->Type) {
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case ACPI_MADT_TYPE_LOCAL_APIC:
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/*
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* The MADT does not include a BSP flag, so we have to
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* let the MP code figure out which CPU is the BSP on
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* its own.
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*/
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proc = (ACPI_MADT_LOCAL_APIC *)entry;
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if (bootverbose)
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printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n",
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proc->Id, proc->ProcessorId,
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(proc->LapicFlags & ACPI_MADT_ENABLED) ?
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"enabled" : "disabled");
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if (!(proc->LapicFlags & ACPI_MADT_ENABLED))
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break;
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if (proc->Id > MAX_APIC_ID)
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panic("%s: CPU ID %u too high", __func__, proc->Id);
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la = &lapics[proc->Id];
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KASSERT(la->la_enabled == 0,
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("Duplicate local APIC ID %u", proc->Id));
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la->la_enabled = 1;
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la->la_acpi_id = proc->ProcessorId;
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lapic_create(proc->Id, 0);
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break;
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}
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}
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/*
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* Add an I/O APIC from an entry in the table.
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*/
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static void
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madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
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{
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ACPI_MADT_IO_APIC *apic;
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switch (entry->Type) {
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case ACPI_MADT_TYPE_IO_APIC:
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apic = (ACPI_MADT_IO_APIC *)entry;
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if (bootverbose)
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printf(
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"MADT: Found IO APIC ID %u, Interrupt %u at %p\n",
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apic->Id, apic->GlobalIrqBase,
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(void *)(uintptr_t)apic->Address);
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if (apic->Id > MAX_APIC_ID)
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panic("%s: I/O APIC ID %u too high", __func__,
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apic->Id);
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if (ioapics[apic->Id].io_apic != NULL)
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panic("%s: Double APIC ID %u", __func__, apic->Id);
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if (apic->GlobalIrqBase >= FIRST_MSI_INT) {
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printf("MADT: Ignoring bogus I/O APIC ID %u", apic->Id);
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break;
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}
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ioapics[apic->Id].io_apic = ioapic_create(apic->Address,
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apic->Id, apic->GlobalIrqBase);
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ioapics[apic->Id].io_vector = apic->GlobalIrqBase;
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break;
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default:
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break;
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}
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}
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/*
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* Determine properties of an interrupt source. Note that for ACPI these
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* functions are only used for ISA interrupts, so we assume ISA bus values
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* (Active Hi, Edge Triggered) for conforming values except for the ACPI
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* SCI for which we use Active Lo, Level Triggered.
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*/
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static enum intr_polarity
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interrupt_polarity(UINT16 IntiFlags, UINT8 Source)
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{
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switch (IntiFlags & ACPI_MADT_POLARITY_MASK) {
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default:
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printf("WARNING: Bogus Interrupt Polarity. Assume CONFORMS\n");
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/* FALLTHROUGH*/
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case ACPI_MADT_POLARITY_CONFORMS:
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if (Source == AcpiGbl_FADT.SciInterrupt)
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return (INTR_POLARITY_LOW);
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else
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return (INTR_POLARITY_HIGH);
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case ACPI_MADT_POLARITY_ACTIVE_HIGH:
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return (INTR_POLARITY_HIGH);
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case ACPI_MADT_POLARITY_ACTIVE_LOW:
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return (INTR_POLARITY_LOW);
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}
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}
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static enum intr_trigger
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interrupt_trigger(UINT16 IntiFlags, UINT8 Source)
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{
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switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) {
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default:
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printf("WARNING: Bogus Interrupt Trigger Mode. Assume CONFORMS.\n");
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/*FALLTHROUGH*/
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case ACPI_MADT_TRIGGER_CONFORMS:
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if (Source == AcpiGbl_FADT.SciInterrupt)
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return (INTR_TRIGGER_LEVEL);
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else
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return (INTR_TRIGGER_EDGE);
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case ACPI_MADT_TRIGGER_EDGE:
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return (INTR_TRIGGER_EDGE);
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case ACPI_MADT_TRIGGER_LEVEL:
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return (INTR_TRIGGER_LEVEL);
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}
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}
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/*
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* Find the local APIC ID associated with a given ACPI Processor ID.
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*/
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static int
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madt_find_cpu(u_int acpi_id, u_int *apic_id)
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{
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int i;
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for (i = 0; i <= MAX_APIC_ID; i++) {
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if (!lapics[i].la_enabled)
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continue;
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if (lapics[i].la_acpi_id != acpi_id)
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continue;
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*apic_id = i;
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return (0);
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}
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return (ENOENT);
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}
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/*
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* Find the IO APIC and pin on that APIC associated with a given global
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* interrupt.
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*/
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static int
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madt_find_interrupt(int intr, void **apic, u_int *pin)
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{
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int i, best;
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best = -1;
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for (i = 0; i <= MAX_APIC_ID; i++) {
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if (ioapics[i].io_apic == NULL ||
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ioapics[i].io_vector > intr)
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continue;
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if (best == -1 ||
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ioapics[best].io_vector < ioapics[i].io_vector)
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best = i;
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}
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if (best == -1)
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return (ENOENT);
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*apic = ioapics[best].io_apic;
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*pin = intr - ioapics[best].io_vector;
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if (*pin > 32)
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printf("WARNING: Found intpin of %u for vector %d\n", *pin,
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intr);
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return (0);
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}
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void
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madt_parse_interrupt_values(void *entry,
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enum intr_trigger *trig, enum intr_polarity *pol)
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{
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ACPI_MADT_INTERRUPT_OVERRIDE *intr;
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char buf[64];
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intr = entry;
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if (bootverbose)
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printf("MADT: Interrupt override: source %u, irq %u\n",
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intr->SourceIrq, intr->GlobalIrq);
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KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
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/*
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* Lookup the appropriate trigger and polarity modes for this
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* entry.
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*/
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*trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq);
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*pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq);
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/*
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* If the SCI is identity mapped but has edge trigger and
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* active-hi polarity or the force_sci_lo tunable is set,
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* force it to use level/lo.
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*/
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if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) {
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madt_found_sci_override = 1;
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if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
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if (tolower(buf[0]) == 'e')
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*trig = INTR_TRIGGER_EDGE;
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else if (tolower(buf[0]) == 'l')
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*trig = INTR_TRIGGER_LEVEL;
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else
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panic(
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"Invalid trigger %s: must be 'edge' or 'level'",
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buf);
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printf("MADT: Forcing SCI to %s trigger\n",
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*trig == INTR_TRIGGER_EDGE ? "edge" : "level");
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}
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if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
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if (tolower(buf[0]) == 'h')
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*pol = INTR_POLARITY_HIGH;
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else if (tolower(buf[0]) == 'l')
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*pol = INTR_POLARITY_LOW;
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else
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panic(
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"Invalid polarity %s: must be 'high' or 'low'",
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buf);
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printf("MADT: Forcing SCI to active %s polarity\n",
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*pol == INTR_POLARITY_HIGH ? "high" : "low");
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}
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}
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}
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/*
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* Parse an interrupt source override for an ISA interrupt.
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*/
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static void
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madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr)
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{
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void *new_ioapic, *old_ioapic;
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u_int new_pin, old_pin;
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enum intr_trigger trig;
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enum intr_polarity pol;
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if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 &&
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intr->GlobalIrq == 2) {
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if (bootverbose)
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printf("MADT: Skipping timer override\n");
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return;
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}
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if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) {
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printf("MADT: Could not find APIC for vector %u (IRQ %u)\n",
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intr->GlobalIrq, intr->SourceIrq);
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return;
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}
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madt_parse_interrupt_values(intr, &trig, &pol);
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/* Remap the IRQ if it is mapped to a different interrupt vector. */
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if (intr->SourceIrq != intr->GlobalIrq) {
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/*
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* If the SCI is remapped to a non-ISA global interrupt,
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* then override the vector we use to setup and allocate
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* the interrupt.
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*/
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if (intr->GlobalIrq > 15 &&
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intr->SourceIrq == AcpiGbl_FADT.SciInterrupt)
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acpi_OverrideInterruptLevel(intr->GlobalIrq);
|
|
else
|
|
ioapic_remap_vector(new_ioapic, new_pin,
|
|
intr->SourceIrq);
|
|
if (madt_find_interrupt(intr->SourceIrq, &old_ioapic,
|
|
&old_pin) != 0)
|
|
printf("MADT: Could not find APIC for source IRQ %u\n",
|
|
intr->SourceIrq);
|
|
else if (ioapic_get_vector(old_ioapic, old_pin) ==
|
|
intr->SourceIrq)
|
|
ioapic_disable_pin(old_ioapic, old_pin);
|
|
}
|
|
|
|
/* Program the polarity and trigger mode. */
|
|
ioapic_set_triggermode(new_ioapic, new_pin, trig);
|
|
ioapic_set_polarity(new_ioapic, new_pin, pol);
|
|
}
|
|
|
|
/*
|
|
* Parse an entry for an NMI routed to an IO APIC.
|
|
*/
|
|
static void
|
|
madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi)
|
|
{
|
|
void *ioapic;
|
|
u_int pin;
|
|
|
|
if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) {
|
|
printf("MADT: Could not find APIC for vector %u\n",
|
|
nmi->GlobalIrq);
|
|
return;
|
|
}
|
|
|
|
ioapic_set_nmi(ioapic, pin);
|
|
if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
|
|
ioapic_set_triggermode(ioapic, pin,
|
|
interrupt_trigger(nmi->IntiFlags, 0));
|
|
if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
|
|
ioapic_set_polarity(ioapic, pin,
|
|
interrupt_polarity(nmi->IntiFlags, 0));
|
|
}
|
|
|
|
/*
|
|
* Parse an entry for an NMI routed to a local APIC LVT pin.
|
|
*/
|
|
static void
|
|
madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi)
|
|
{
|
|
u_int apic_id, pin;
|
|
|
|
if (nmi->ProcessorId == 0xff)
|
|
apic_id = APIC_ID_ALL;
|
|
else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) {
|
|
if (bootverbose)
|
|
printf("MADT: Ignoring local NMI routed to "
|
|
"ACPI CPU %u\n", nmi->ProcessorId);
|
|
return;
|
|
}
|
|
if (nmi->Lint == 0)
|
|
pin = APIC_LVT_LINT0;
|
|
else
|
|
pin = APIC_LVT_LINT1;
|
|
lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
|
|
if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
|
|
lapic_set_lvt_triggermode(apic_id, pin,
|
|
interrupt_trigger(nmi->IntiFlags, 0));
|
|
if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
|
|
lapic_set_lvt_polarity(apic_id, pin,
|
|
interrupt_polarity(nmi->IntiFlags, 0));
|
|
}
|
|
|
|
/*
|
|
* Parse interrupt entries.
|
|
*/
|
|
static void
|
|
madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
|
|
{
|
|
|
|
switch (entry->Type) {
|
|
case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
|
|
madt_parse_interrupt_override(
|
|
(ACPI_MADT_INTERRUPT_OVERRIDE *)entry);
|
|
break;
|
|
case ACPI_MADT_TYPE_NMI_SOURCE:
|
|
madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry);
|
|
break;
|
|
case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
|
|
madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Setup per-CPU ACPI IDs.
|
|
*/
|
|
static void
|
|
madt_set_ids(void *dummy)
|
|
{
|
|
struct lapic_info *la;
|
|
struct pcpu *pc;
|
|
u_int i;
|
|
|
|
if (madt == NULL)
|
|
return;
|
|
CPU_FOREACH(i) {
|
|
pc = pcpu_find(i);
|
|
KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
|
|
la = &lapics[pc->pc_apic_id];
|
|
if (!la->la_enabled)
|
|
panic("APIC: CPU with APIC ID %u is not enabled",
|
|
pc->pc_apic_id);
|
|
pc->pc_acpi_id = la->la_acpi_id;
|
|
if (bootverbose)
|
|
printf("APIC: CPU %u has ACPI ID %u\n", i,
|
|
la->la_acpi_id);
|
|
}
|
|
}
|
|
SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, madt_set_ids, NULL);
|