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f-stack/freebsd/x86/x86/mptable.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1996, by Steve Passe
* All rights reserved.
* Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
*
* 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. The name of the developer may NOT be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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_mptable_force_htt.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/smp.h>
#ifdef NEW_PCIB
#include <sys/rman.h>
#endif
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <dev/pci/pcivar.h>
#ifdef NEW_PCIB
#include <dev/pci/pcib_private.h>
#endif
#include <x86/apicreg.h>
#include <x86/mptable.h>
#include <machine/frame.h>
#include <machine/intr_machdep.h>
#include <x86/apicvar.h>
#include <machine/md_var.h>
#include <machine/pc/bios.h>
#ifdef NEW_PCIB
#include <machine/resource.h>
#endif
#include <machine/specialreg.h>
/* string defined by the Intel MP Spec as identifying the MP table */
#define MP_SIG 0x5f504d5f /* _MP_ */
#ifdef __amd64__
#define MAX_LAPIC_ID 63 /* Max local APIC ID for HTT fixup */
#else
#define MAX_LAPIC_ID 31 /* Max local APIC ID for HTT fixup */
#endif
#define BIOS_BASE (0xf0000)
#define BIOS_SIZE (0x10000)
#define BIOS_COUNT (BIOS_SIZE/4)
typedef void mptable_entry_handler(u_char *entry, void *arg);
typedef void mptable_extended_entry_handler(ext_entry_ptr entry, void *arg);
/* descriptions of MP table entries */
typedef struct BASETABLE_ENTRY {
uint8_t type;
uint8_t length;
uint8_t name[16];
} basetable_entry;
static basetable_entry basetable_entry_types[] =
{
{0, 20, "Processor"},
{1, 8, "Bus"},
{2, 8, "I/O APIC"},
{3, 8, "I/O INT"},
{4, 8, "Local INT"}
};
typedef struct BUSDATA {
u_char bus_id;
enum busTypes bus_type;
} bus_datum;
typedef struct INTDATA {
u_char int_type;
u_short int_flags;
u_char src_bus_id;
u_char src_bus_irq;
u_char dst_apic_id;
u_char dst_apic_int;
u_char int_vector;
} io_int, local_int;
typedef struct BUSTYPENAME {
u_char type;
char name[7];
} bus_type_name;
/* From MP spec v1.4, table 4-8. */
static bus_type_name bus_type_table[] =
{
{UNKNOWN_BUSTYPE, "CBUS "},
{UNKNOWN_BUSTYPE, "CBUSII"},
{EISA, "EISA "},
{UNKNOWN_BUSTYPE, "FUTURE"},
{UNKNOWN_BUSTYPE, "INTERN"},
{ISA, "ISA "},
{UNKNOWN_BUSTYPE, "MBI "},
{UNKNOWN_BUSTYPE, "MBII "},
{MCA, "MCA "},
{UNKNOWN_BUSTYPE, "MPI "},
{UNKNOWN_BUSTYPE, "MPSA "},
{UNKNOWN_BUSTYPE, "NUBUS "},
{PCI, "PCI "},
{UNKNOWN_BUSTYPE, "PCMCIA"},
{UNKNOWN_BUSTYPE, "TC "},
{UNKNOWN_BUSTYPE, "VL "},
{UNKNOWN_BUSTYPE, "VME "},
{UNKNOWN_BUSTYPE, "XPRESS"}
};
/* From MP spec v1.4, table 5-1. */
static int default_data[7][5] =
{
/* nbus, id0, type0, id1, type1 */
{1, 0, ISA, 255, NOBUS},
{1, 0, EISA, 255, NOBUS},
{1, 0, EISA, 255, NOBUS},
{1, 0, MCA, 255, NOBUS},
{2, 0, ISA, 1, PCI},
{2, 0, EISA, 1, PCI},
{2, 0, MCA, 1, PCI}
};
struct pci_probe_table_args {
u_char bus;
u_char found;
};
struct pci_route_interrupt_args {
u_char bus; /* Source bus. */
u_char irq; /* Source slot:pin. */
int vector; /* Return value. */
};
static mpfps_t mpfps;
static mpcth_t mpct;
static ext_entry_ptr mpet;
static void *ioapics[IOAPIC_MAX_ID + 1];
static bus_datum *busses;
static int mptable_nioapics, mptable_nbusses, mptable_maxbusid;
static int pci0 = -1;
static MALLOC_DEFINE(M_MPTABLE, "mptable", "MP Table Items");
static enum intr_polarity conforming_polarity(u_char src_bus,
u_char src_bus_irq);
static enum intr_trigger conforming_trigger(u_char src_bus, u_char src_bus_irq);
static enum intr_polarity intentry_polarity(int_entry_ptr intr);
static enum intr_trigger intentry_trigger(int_entry_ptr intr);
static int lookup_bus_type(char *name);
static void mptable_count_items(void);
static void mptable_count_items_handler(u_char *entry, void *arg);
#ifdef MPTABLE_FORCE_HTT
static void mptable_hyperthread_fixup(u_int id_mask);
#endif
static void mptable_parse_apics_and_busses(void);
static void mptable_parse_apics_and_busses_handler(u_char *entry,
void *arg);
static void mptable_parse_default_config_ints(void);
static void mptable_parse_ints(void);
static void mptable_parse_ints_handler(u_char *entry, void *arg);
static void mptable_parse_io_int(int_entry_ptr intr);
static void mptable_parse_local_int(int_entry_ptr intr);
static void mptable_pci_probe_table_handler(u_char *entry, void *arg);
static void mptable_pci_route_interrupt_handler(u_char *entry, void *arg);
static void mptable_pci_setup(void);
static int mptable_probe(void);
static int mptable_probe_cpus(void);
static void mptable_probe_cpus_handler(u_char *entry, void *arg __unused);
static void mptable_setup_cpus_handler(u_char *entry, void *arg __unused);
static void mptable_register(void *dummy);
static int mptable_setup_local(void);
static int mptable_setup_io(void);
#ifdef NEW_PCIB
static void mptable_walk_extended_table(
mptable_extended_entry_handler *handler, void *arg);
#endif
static void mptable_walk_table(mptable_entry_handler *handler, void *arg);
static int search_for_sig(u_int32_t target, int count);
static struct apic_enumerator mptable_enumerator = {
.apic_name = "MPTable",
.apic_probe = mptable_probe,
.apic_probe_cpus = mptable_probe_cpus,
.apic_setup_local = mptable_setup_local,
.apic_setup_io = mptable_setup_io
};
/*
* look for the MP spec signature
*/
static int
search_for_sig(u_int32_t target, int count)
{
int x;
u_int32_t *addr;
addr = (u_int32_t *)BIOS_PADDRTOVADDR(target);
for (x = 0; x < count; x += 4)
if (addr[x] == MP_SIG)
/* make array index a byte index */
return (target + (x * sizeof(u_int32_t)));
return (-1);
}
static int
lookup_bus_type(char *name)
{
int x;
for (x = 0; x < MAX_BUSTYPE; ++x)
if (strncmp(bus_type_table[x].name, name, 6) == 0)
return (bus_type_table[x].type);
return (UNKNOWN_BUSTYPE);
}
/*
* Look for an Intel MP spec table (ie, SMP capable hardware).
*/
static int
mptable_probe(void)
{
int x;
u_long segment;
u_int32_t target;
/* see if EBDA exists */
if ((segment = *(u_short *)BIOS_PADDRTOVADDR(0x40e)) != 0) {
/* search first 1K of EBDA */
target = (u_int32_t) (segment << 4);
if ((x = search_for_sig(target, 1024 / 4)) >= 0)
goto found;
} else {
/* last 1K of base memory, effective 'top of base' passed in */
target = (u_int32_t) ((basemem * 1024) - 0x400);
if ((x = search_for_sig(target, 1024 / 4)) >= 0)
goto found;
}
/* search the BIOS */
target = (u_int32_t) BIOS_BASE;
if ((x = search_for_sig(target, BIOS_COUNT)) >= 0)
goto found;
/* nothing found */
return (ENXIO);
found:
mpfps = (mpfps_t)BIOS_PADDRTOVADDR(x);
/* Map in the configuration table if it exists. */
if (mpfps->config_type != 0) {
if (bootverbose)
printf(
"MP Table version 1.%d found using Default Configuration %d\n",
mpfps->spec_rev, mpfps->config_type);
if (mpfps->config_type != 5 && mpfps->config_type != 6) {
printf(
"MP Table Default Configuration %d is unsupported\n",
mpfps->config_type);
return (ENXIO);
}
mpct = NULL;
} else {
if ((uintptr_t)mpfps->pap >= 1024 * 1024) {
printf("%s: Unable to map MP Configuration Table\n",
__func__);
return (ENXIO);
}
mpct = (mpcth_t)BIOS_PADDRTOVADDR((uintptr_t)mpfps->pap);
if (mpct->base_table_length + (uintptr_t)mpfps->pap >=
1024 * 1024) {
printf("%s: Unable to map end of MP Config Table\n",
__func__);
return (ENXIO);
}
if (mpct->extended_table_length != 0 &&
mpct->extended_table_length + mpct->base_table_length +
(uintptr_t)mpfps->pap < 1024 * 1024)
mpet = (ext_entry_ptr)((char *)mpct +
mpct->base_table_length);
if (mpct->signature[0] != 'P' || mpct->signature[1] != 'C' ||
mpct->signature[2] != 'M' || mpct->signature[3] != 'P') {
printf("%s: MP Config Table has bad signature: %c%c%c%c\n",
__func__, mpct->signature[0], mpct->signature[1],
mpct->signature[2], mpct->signature[3]);
return (ENXIO);
}
if (bootverbose)
printf(
"MP Configuration Table version 1.%d found at %p\n",
mpct->spec_rev, mpct);
}
return (-100);
}
/*
* Run through the MP table enumerating CPUs.
*/
static int
mptable_probe_cpus(void)
{
u_int cpu_mask;
/* Is this a pre-defined config? */
if (mpfps->config_type != 0) {
#ifdef SMP
mp_ncpus = 2;
mp_maxid = 1;
#endif
max_apic_id = 1;
} else {
mptable_walk_table(mptable_probe_cpus_handler, &cpu_mask);
}
return (0);
}
/*
* Initialize the local APIC on the BSP.
*/
static int
mptable_setup_local(void)
{
vm_paddr_t addr;
u_int cpu_mask;
/* Is this a pre-defined config? */
printf("MPTable: <");
if (mpfps->config_type != 0) {
lapic_create(0, 1);
lapic_create(1, 0);
addr = DEFAULT_APIC_BASE;
printf("Default Configuration %d", mpfps->config_type);
} else {
cpu_mask = 0;
mptable_walk_table(mptable_setup_cpus_handler, &cpu_mask);
#ifdef MPTABLE_FORCE_HTT
mptable_hyperthread_fixup(cpu_mask);
#endif
addr = mpct->apic_address;
printf("%.*s %.*s", (int)sizeof(mpct->oem_id), mpct->oem_id,
(int)sizeof(mpct->product_id), mpct->product_id);
}
printf(">\n");
lapic_init(addr);
return (0);
}
/*
* Run through the MP table enumerating I/O APICs.
*/
static int
mptable_setup_io(void)
{
int i;
u_char byte;
/* First, we count individual items and allocate arrays. */
mptable_count_items();
busses = malloc((mptable_maxbusid + 1) * sizeof(bus_datum), M_MPTABLE,
M_WAITOK);
for (i = 0; i <= mptable_maxbusid; i++)
busses[i].bus_type = NOBUS;
/* Second, we run through adding I/O APIC's and buses. */
mptable_parse_apics_and_busses();
/* Third, we run through the table tweaking interrupt sources. */
mptable_parse_ints();
/* Fourth, we register all the I/O APIC's. */
for (i = 0; i <= IOAPIC_MAX_ID; i++)
if (ioapics[i] != NULL)
ioapic_register(ioapics[i]);
/* Fifth, we setup data structures to handle PCI interrupt routing. */
mptable_pci_setup();
/* Finally, we throw the switch to enable the I/O APIC's. */
if (mpfps->mpfb2 & MPFB2_IMCR_PRESENT) {
outb(0x22, 0x70); /* select IMCR */
byte = inb(0x23); /* current contents */
byte |= 0x01; /* mask external INTR */
outb(0x23, byte); /* disconnect 8259s/NMI */
}
return (0);
}
static void
mptable_register(void *dummy __unused)
{
apic_register_enumerator(&mptable_enumerator);
}
SYSINIT(mptable_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, mptable_register,
NULL);
/*
* Call the handler routine for each entry in the MP config base table.
*/
static void
mptable_walk_table(mptable_entry_handler *handler, void *arg)
{
u_int i;
u_char *entry;
entry = (u_char *)(mpct + 1);
for (i = 0; i < mpct->entry_count; i++) {
switch (*entry) {
case MPCT_ENTRY_PROCESSOR:
case MPCT_ENTRY_IOAPIC:
case MPCT_ENTRY_BUS:
case MPCT_ENTRY_INT:
case MPCT_ENTRY_LOCAL_INT:
break;
default:
panic("%s: Unknown MP Config Entry %d\n", __func__,
(int)*entry);
}
handler(entry, arg);
entry += basetable_entry_types[*entry].length;
}
}
#ifdef NEW_PCIB
/*
* Call the handler routine for each entry in the MP config extended
* table.
*/
static void
mptable_walk_extended_table(mptable_extended_entry_handler *handler, void *arg)
{
ext_entry_ptr end, entry;
if (mpet == NULL)
return;
entry = mpet;
end = (ext_entry_ptr)((char *)mpet + mpct->extended_table_length);
while (entry < end) {
handler(entry, arg);
entry = (ext_entry_ptr)((char *)entry + entry->length);
}
}
#endif
static void
mptable_probe_cpus_handler(u_char *entry, void *arg)
{
proc_entry_ptr proc;
switch (*entry) {
case MPCT_ENTRY_PROCESSOR:
proc = (proc_entry_ptr)entry;
if (proc->cpu_flags & PROCENTRY_FLAG_EN &&
proc->apic_id < MAX_LAPIC_ID && mp_ncpus < MAXCPU) {
#ifdef SMP
mp_ncpus++;
mp_maxid = mp_ncpus - 1;
#endif
max_apic_id = max(max_apic_id, proc->apic_id);
}
break;
}
}
static void
mptable_setup_cpus_handler(u_char *entry, void *arg)
{
proc_entry_ptr proc;
u_int *cpu_mask;
switch (*entry) {
case MPCT_ENTRY_PROCESSOR:
proc = (proc_entry_ptr)entry;
if (proc->cpu_flags & PROCENTRY_FLAG_EN) {
lapic_create(proc->apic_id, proc->cpu_flags &
PROCENTRY_FLAG_BP);
if (proc->apic_id < MAX_LAPIC_ID) {
cpu_mask = (u_int *)arg;
*cpu_mask |= (1ul << proc->apic_id);
}
}
break;
}
}
static void
mptable_count_items_handler(u_char *entry, void *arg __unused)
{
io_apic_entry_ptr apic;
bus_entry_ptr bus;
switch (*entry) {
case MPCT_ENTRY_BUS:
bus = (bus_entry_ptr)entry;
mptable_nbusses++;
if (bus->bus_id > mptable_maxbusid)
mptable_maxbusid = bus->bus_id;
break;
case MPCT_ENTRY_IOAPIC:
apic = (io_apic_entry_ptr)entry;
if (apic->apic_flags & IOAPICENTRY_FLAG_EN)
mptable_nioapics++;
break;
}
}
/*
* Count items in the table.
*/
static void
mptable_count_items(void)
{
/* Is this a pre-defined config? */
if (mpfps->config_type != 0) {
mptable_nioapics = 1;
switch (mpfps->config_type) {
case 1:
case 2:
case 3:
case 4:
mptable_nbusses = 1;
break;
case 5:
case 6:
case 7:
mptable_nbusses = 2;
break;
default:
panic("Unknown pre-defined MP Table config type %d",
mpfps->config_type);
}
mptable_maxbusid = mptable_nbusses - 1;
} else
mptable_walk_table(mptable_count_items_handler, NULL);
}
/*
* Add a bus or I/O APIC from an entry in the table.
*/
static void
mptable_parse_apics_and_busses_handler(u_char *entry, void *arg __unused)
{
io_apic_entry_ptr apic;
bus_entry_ptr bus;
enum busTypes bus_type;
int i;
switch (*entry) {
case MPCT_ENTRY_BUS:
bus = (bus_entry_ptr)entry;
bus_type = lookup_bus_type(bus->bus_type);
if (bus_type == UNKNOWN_BUSTYPE) {
printf("MPTable: Unknown bus %d type \"", bus->bus_id);
for (i = 0; i < 6; i++)
printf("%c", bus->bus_type[i]);
printf("\"\n");
}
busses[bus->bus_id].bus_id = bus->bus_id;
busses[bus->bus_id].bus_type = bus_type;
break;
case MPCT_ENTRY_IOAPIC:
apic = (io_apic_entry_ptr)entry;
if (!(apic->apic_flags & IOAPICENTRY_FLAG_EN))
break;
if (apic->apic_id > IOAPIC_MAX_ID)
panic("%s: I/O APIC ID %d too high", __func__,
apic->apic_id);
if (ioapics[apic->apic_id] != NULL)
panic("%s: Double APIC ID %d", __func__,
apic->apic_id);
ioapics[apic->apic_id] = ioapic_create(apic->apic_address,
apic->apic_id, -1);
break;
default:
break;
}
}
/*
* Enumerate I/O APIC's and buses.
*/
static void
mptable_parse_apics_and_busses(void)
{
/* Is this a pre-defined config? */
if (mpfps->config_type != 0) {
ioapics[2] = ioapic_create(DEFAULT_IO_APIC_BASE, 2, 0);
busses[0].bus_id = 0;
busses[0].bus_type = default_data[mpfps->config_type - 1][2];
if (mptable_nbusses > 1) {
busses[1].bus_id = 1;
busses[1].bus_type =
default_data[mpfps->config_type - 1][4];
}
} else
mptable_walk_table(mptable_parse_apics_and_busses_handler,
NULL);
}
/*
* Determine conforming polarity for a given bus type.
*/
static enum intr_polarity
conforming_polarity(u_char src_bus, u_char src_bus_irq)
{
KASSERT(src_bus <= mptable_maxbusid, ("bus id %d too large", src_bus));
switch (busses[src_bus].bus_type) {
case ISA:
case EISA:
return (INTR_POLARITY_HIGH);
case PCI:
return (INTR_POLARITY_LOW);
default:
panic("%s: unknown bus type %d", __func__,
busses[src_bus].bus_type);
}
}
/*
* Determine conforming trigger for a given bus type.
*/
static enum intr_trigger
conforming_trigger(u_char src_bus, u_char src_bus_irq)
{
KASSERT(src_bus <= mptable_maxbusid, ("bus id %d too large", src_bus));
switch (busses[src_bus].bus_type) {
case ISA:
if (elcr_found)
return (elcr_read_trigger(src_bus_irq));
else
return (INTR_TRIGGER_EDGE);
case PCI:
return (INTR_TRIGGER_LEVEL);
case EISA:
KASSERT(src_bus_irq < 16, ("Invalid EISA IRQ %d", src_bus_irq));
KASSERT(elcr_found, ("Missing ELCR"));
return (elcr_read_trigger(src_bus_irq));
default:
panic("%s: unknown bus type %d", __func__,
busses[src_bus].bus_type);
}
}
static enum intr_polarity
intentry_polarity(int_entry_ptr intr)
{
switch (intr->int_flags & INTENTRY_FLAGS_POLARITY) {
case INTENTRY_FLAGS_POLARITY_CONFORM:
return (conforming_polarity(intr->src_bus_id,
intr->src_bus_irq));
case INTENTRY_FLAGS_POLARITY_ACTIVEHI:
return (INTR_POLARITY_HIGH);
case INTENTRY_FLAGS_POLARITY_ACTIVELO:
return (INTR_POLARITY_LOW);
default:
panic("Bogus interrupt flags");
}
}
static enum intr_trigger
intentry_trigger(int_entry_ptr intr)
{
switch (intr->int_flags & INTENTRY_FLAGS_TRIGGER) {
case INTENTRY_FLAGS_TRIGGER_CONFORM:
return (conforming_trigger(intr->src_bus_id,
intr->src_bus_irq));
case INTENTRY_FLAGS_TRIGGER_EDGE:
return (INTR_TRIGGER_EDGE);
case INTENTRY_FLAGS_TRIGGER_LEVEL:
return (INTR_TRIGGER_LEVEL);
default:
panic("Bogus interrupt flags");
}
}
/*
* Parse an interrupt entry for an I/O interrupt routed to a pin on an I/O APIC.
*/
static void
mptable_parse_io_int(int_entry_ptr intr)
{
void *ioapic;
u_int pin, apic_id;
apic_id = intr->dst_apic_id;
if (intr->dst_apic_id == 0xff) {
/*
* An APIC ID of 0xff means that the interrupt is connected
* to the specified pin on all I/O APICs in the system. If
* there is only one I/O APIC, then use that APIC to route
* the interrupts. If there is more than one I/O APIC, then
* punt.
*/
if (mptable_nioapics == 1) {
apic_id = 0;
while (ioapics[apic_id] == NULL)
apic_id++;
} else {
printf(
"MPTable: Ignoring global interrupt entry for pin %d\n",
intr->dst_apic_int);
return;
}
}
if (apic_id > IOAPIC_MAX_ID) {
printf("MPTable: Ignoring interrupt entry for ioapic%d\n",
intr->dst_apic_id);
return;
}
ioapic = ioapics[apic_id];
if (ioapic == NULL) {
printf(
"MPTable: Ignoring interrupt entry for missing ioapic%d\n",
apic_id);
return;
}
pin = intr->dst_apic_int;
switch (intr->int_type) {
case INTENTRY_TYPE_INT:
switch (busses[intr->src_bus_id].bus_type) {
case NOBUS:
panic("interrupt from missing bus");
case ISA:
case EISA:
if (busses[intr->src_bus_id].bus_type == ISA)
ioapic_set_bus(ioapic, pin, APIC_BUS_ISA);
else
ioapic_set_bus(ioapic, pin, APIC_BUS_EISA);
if (intr->src_bus_irq == pin)
break;
ioapic_remap_vector(ioapic, pin, intr->src_bus_irq);
if (ioapic_get_vector(ioapic, intr->src_bus_irq) ==
intr->src_bus_irq)
ioapic_disable_pin(ioapic, intr->src_bus_irq);
break;
case PCI:
ioapic_set_bus(ioapic, pin, APIC_BUS_PCI);
break;
default:
ioapic_set_bus(ioapic, pin, APIC_BUS_UNKNOWN);
break;
}
break;
case INTENTRY_TYPE_NMI:
ioapic_set_nmi(ioapic, pin);
break;
case INTENTRY_TYPE_SMI:
ioapic_set_smi(ioapic, pin);
break;
case INTENTRY_TYPE_EXTINT:
ioapic_set_extint(ioapic, pin);
break;
default:
panic("%s: invalid interrupt entry type %d\n", __func__,
intr->int_type);
}
if (intr->int_type == INTENTRY_TYPE_INT ||
(intr->int_flags & INTENTRY_FLAGS_TRIGGER) !=
INTENTRY_FLAGS_TRIGGER_CONFORM)
ioapic_set_triggermode(ioapic, pin, intentry_trigger(intr));
if (intr->int_type == INTENTRY_TYPE_INT ||
(intr->int_flags & INTENTRY_FLAGS_POLARITY) !=
INTENTRY_FLAGS_POLARITY_CONFORM)
ioapic_set_polarity(ioapic, pin, intentry_polarity(intr));
}
/*
* Parse an interrupt entry for a local APIC LVT pin.
*/
static void
mptable_parse_local_int(int_entry_ptr intr)
{
u_int apic_id, pin;
if (intr->dst_apic_id == 0xff)
apic_id = APIC_ID_ALL;
else
apic_id = intr->dst_apic_id;
if (intr->dst_apic_int == 0)
pin = APIC_LVT_LINT0;
else
pin = APIC_LVT_LINT1;
switch (intr->int_type) {
case INTENTRY_TYPE_INT:
#if 1
printf(
"MPTable: Ignoring vectored local interrupt for LINTIN%d vector %d\n",
intr->dst_apic_int, intr->src_bus_irq);
return;
#else
lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_FIXED);
break;
#endif
case INTENTRY_TYPE_NMI:
lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
break;
case INTENTRY_TYPE_SMI:
lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_SMI);
break;
case INTENTRY_TYPE_EXTINT:
lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_EXTINT);
break;
default:
panic("%s: invalid interrupt entry type %d\n", __func__,
intr->int_type);
}
if ((intr->int_flags & INTENTRY_FLAGS_TRIGGER) !=
INTENTRY_FLAGS_TRIGGER_CONFORM)
lapic_set_lvt_triggermode(apic_id, pin,
intentry_trigger(intr));
if ((intr->int_flags & INTENTRY_FLAGS_POLARITY) !=
INTENTRY_FLAGS_POLARITY_CONFORM)
lapic_set_lvt_polarity(apic_id, pin, intentry_polarity(intr));
}
/*
* Parse interrupt entries.
*/
static void
mptable_parse_ints_handler(u_char *entry, void *arg __unused)
{
int_entry_ptr intr;
intr = (int_entry_ptr)entry;
switch (*entry) {
case MPCT_ENTRY_INT:
mptable_parse_io_int(intr);
break;
case MPCT_ENTRY_LOCAL_INT:
mptable_parse_local_int(intr);
break;
}
}
/*
* Configure interrupt pins for a default configuration. For details see
* Table 5-2 in Section 5 of the MP Table specification.
*/
static void
mptable_parse_default_config_ints(void)
{
struct INTENTRY entry;
int pin;
/*
* All default configs route IRQs from bus 0 to the first 16 pins
* of the first I/O APIC with an APIC ID of 2.
*/
entry.type = MPCT_ENTRY_INT;
entry.int_flags = INTENTRY_FLAGS_POLARITY_CONFORM |
INTENTRY_FLAGS_TRIGGER_CONFORM;
entry.src_bus_id = 0;
entry.dst_apic_id = 2;
/* Run through all 16 pins. */
for (pin = 0; pin < 16; pin++) {
entry.dst_apic_int = pin;
switch (pin) {
case 0:
/* Pin 0 is an ExtINT pin. */
entry.int_type = INTENTRY_TYPE_EXTINT;
break;
case 2:
/* IRQ 0 is routed to pin 2. */
entry.int_type = INTENTRY_TYPE_INT;
entry.src_bus_irq = 0;
break;
default:
/* All other pins are identity mapped. */
entry.int_type = INTENTRY_TYPE_INT;
entry.src_bus_irq = pin;
break;
}
mptable_parse_io_int(&entry);
}
/* Certain configs disable certain pins. */
if (mpfps->config_type == 7)
ioapic_disable_pin(ioapics[2], 0);
if (mpfps->config_type == 2) {
ioapic_disable_pin(ioapics[2], 2);
ioapic_disable_pin(ioapics[2], 13);
}
}
/*
* Configure the interrupt pins
*/
static void
mptable_parse_ints(void)
{
/* Is this a pre-defined config? */
if (mpfps->config_type != 0) {
/* Configure LINT pins. */
lapic_set_lvt_mode(APIC_ID_ALL, APIC_LVT_LINT0,
APIC_LVT_DM_EXTINT);
lapic_set_lvt_mode(APIC_ID_ALL, APIC_LVT_LINT1, APIC_LVT_DM_NMI);
/* Configure I/O APIC pins. */
mptable_parse_default_config_ints();
} else
mptable_walk_table(mptable_parse_ints_handler, NULL);
}
#ifdef MPTABLE_FORCE_HTT
/*
* Perform a hyperthreading "fix-up" to enumerate any logical CPU's
* that aren't already listed in the table.
*
* XXX: We assume that all of the physical CPUs in the
* system have the same number of logical CPUs.
*
* XXX: We assume that APIC ID's are allocated such that
* the APIC ID's for a physical processor are aligned
* with the number of logical CPU's in the processor.
*/
static void
mptable_hyperthread_fixup(u_int id_mask)
{
u_int i, id, logical_cpus;
/* Nothing to do if there is no HTT support. */
if ((cpu_feature & CPUID_HTT) == 0)
return;
logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
if (logical_cpus <= 1)
return;
/*
* For each APIC ID of a CPU that is set in the mask,
* scan the other candidate APIC ID's for this
* physical processor. If any of those ID's are
* already in the table, then kill the fixup.
*/
for (id = 0; id <= MAX_LAPIC_ID; id++) {
if ((id_mask & 1 << id) == 0)
continue;
/* First, make sure we are on a logical_cpus boundary. */
if (id % logical_cpus != 0)
return;
for (i = id + 1; i < id + logical_cpus; i++)
if ((id_mask & 1 << i) != 0)
return;
}
/*
* Ok, the ID's checked out, so perform the fixup by
* adding the logical CPUs.
*/
while ((id = ffs(id_mask)) != 0) {
id--;
for (i = id + 1; i < id + logical_cpus; i++) {
if (bootverbose)
printf(
"MPTable: Adding logical CPU %d from main CPU %d\n",
i, id);
lapic_create(i, 0);
}
id_mask &= ~(1 << id);
}
}
#endif /* MPTABLE_FORCE_HTT */
/*
* Support code for routing PCI interrupts using the MP Table.
*/
static void
mptable_pci_setup(void)
{
int i;
/*
* Find the first pci bus and call it 0. Panic if pci0 is not
* bus zero and there are multiple PCI buses.
*/
for (i = 0; i <= mptable_maxbusid; i++)
if (busses[i].bus_type == PCI) {
if (pci0 == -1)
pci0 = i;
else if (pci0 != 0)
panic(
"MPTable contains multiple PCI buses but no PCI bus 0");
}
}
static void
mptable_pci_probe_table_handler(u_char *entry, void *arg)
{
struct pci_probe_table_args *args;
int_entry_ptr intr;
if (*entry != MPCT_ENTRY_INT)
return;
intr = (int_entry_ptr)entry;
args = (struct pci_probe_table_args *)arg;
KASSERT(args->bus <= mptable_maxbusid,
("bus %d is too big", args->bus));
KASSERT(busses[args->bus].bus_type == PCI, ("probing for non-PCI bus"));
if (intr->src_bus_id == args->bus)
args->found = 1;
}
int
mptable_pci_probe_table(int bus)
{
struct pci_probe_table_args args;
if (bus < 0)
return (EINVAL);
if (mpct == NULL || pci0 == -1 || pci0 + bus > mptable_maxbusid)
return (ENXIO);
if (busses[pci0 + bus].bus_type != PCI)
return (ENXIO);
args.bus = pci0 + bus;
args.found = 0;
mptable_walk_table(mptable_pci_probe_table_handler, &args);
if (args.found == 0)
return (ENXIO);
return (0);
}
static void
mptable_pci_route_interrupt_handler(u_char *entry, void *arg)
{
struct pci_route_interrupt_args *args;
int_entry_ptr intr;
int vector;
if (*entry != MPCT_ENTRY_INT)
return;
intr = (int_entry_ptr)entry;
args = (struct pci_route_interrupt_args *)arg;
if (intr->src_bus_id != args->bus || intr->src_bus_irq != args->irq)
return;
/* Make sure the APIC maps to a known APIC. */
KASSERT(ioapics[intr->dst_apic_id] != NULL,
("No I/O APIC %d to route interrupt to", intr->dst_apic_id));
/*
* Look up the vector for this APIC / pin combination. If we
* have previously matched an entry for this PCI IRQ but it
* has the same vector as this entry, just return. Otherwise,
* we use the vector for this APIC / pin combination.
*/
vector = ioapic_get_vector(ioapics[intr->dst_apic_id],
intr->dst_apic_int);
if (args->vector == vector)
return;
KASSERT(args->vector == -1,
("Multiple IRQs for PCI interrupt %d.%d.INT%c: %d and %d\n",
args->bus, args->irq >> 2, 'A' + (args->irq & 0x3), args->vector,
vector));
args->vector = vector;
}
int
mptable_pci_route_interrupt(device_t pcib, device_t dev, int pin)
{
struct pci_route_interrupt_args args;
int slot;
/* Like ACPI, pin numbers are 0-3, not 1-4. */
pin--;
KASSERT(pci0 != -1, ("do not know how to route PCI interrupts"));
args.bus = pci_get_bus(dev) + pci0;
slot = pci_get_slot(dev);
/*
* PCI interrupt entries in the MP Table encode both the slot and
* pin into the IRQ with the pin being the two least significant
* bits, the slot being the next five bits, and the most significant
* bit being reserved.
*/
args.irq = slot << 2 | pin;
args.vector = -1;
mptable_walk_table(mptable_pci_route_interrupt_handler, &args);
if (args.vector < 0) {
device_printf(pcib, "unable to route slot %d INT%c\n", slot,
'A' + pin);
return (PCI_INVALID_IRQ);
}
if (bootverbose)
device_printf(pcib, "slot %d INT%c routed to irq %d\n", slot,
'A' + pin, args.vector);
return (args.vector);
}
#ifdef NEW_PCIB
struct host_res_args {
struct mptable_hostb_softc *sc;
device_t dev;
u_char bus;
};
/*
* Initialize a Host-PCI bridge so it can restrict resource allocation
* requests to the resources it actually decodes according to MP
* config table extended entries.
*/
static void
mptable_host_res_handler(ext_entry_ptr entry, void *arg)
{
struct host_res_args *args;
cbasm_entry_ptr cbasm;
sas_entry_ptr sas;
const char *name;
uint64_t start, end;
int error, *flagp, flags, type;
args = arg;
switch (entry->type) {
case MPCT_EXTENTRY_SAS:
sas = (sas_entry_ptr)entry;
if (sas->bus_id != args->bus)
break;
switch (sas->address_type) {
case SASENTRY_TYPE_IO:
type = SYS_RES_IOPORT;
flags = 0;
break;
case SASENTRY_TYPE_MEMORY:
type = SYS_RES_MEMORY;
flags = 0;
break;
case SASENTRY_TYPE_PREFETCH:
type = SYS_RES_MEMORY;
flags = RF_PREFETCHABLE;
break;
default:
printf(
"MPTable: Unknown systems address space type for bus %u: %d\n",
sas->bus_id, sas->address_type);
return;
}
start = sas->address_base;
end = sas->address_base + sas->address_length - 1;
#ifdef __i386__
if (start > ULONG_MAX) {
device_printf(args->dev,
"Ignoring %d range above 4GB (%#jx-%#jx)\n",
type, (uintmax_t)start, (uintmax_t)end);
break;
}
if (end > ULONG_MAX) {
device_printf(args->dev,
"Truncating end of %d range above 4GB (%#jx-%#jx)\n",
type, (uintmax_t)start, (uintmax_t)end);
end = ULONG_MAX;
}
#endif
error = pcib_host_res_decodes(&args->sc->sc_host_res, type,
start, end, flags);
if (error)
panic("Failed to manage %d range (%#jx-%#jx): %d",
type, (uintmax_t)start, (uintmax_t)end, error);
break;
case MPCT_EXTENTRY_CBASM:
cbasm = (cbasm_entry_ptr)entry;
if (cbasm->bus_id != args->bus)
break;
switch (cbasm->predefined_range) {
case CBASMENTRY_RANGE_ISA_IO:
flagp = &args->sc->sc_decodes_isa_io;
name = "ISA I/O";
break;
case CBASMENTRY_RANGE_VGA_IO:
flagp = &args->sc->sc_decodes_vga_io;
name = "VGA I/O";
break;
default:
printf(
"MPTable: Unknown compatiblity address space range for bus %u: %d\n",
cbasm->bus_id, cbasm->predefined_range);
return;
}
if (*flagp != 0)
printf(
"MPTable: Duplicate compatibility %s range for bus %u\n",
name, cbasm->bus_id);
switch (cbasm->address_mod) {
case CBASMENTRY_ADDRESS_MOD_ADD:
*flagp = 1;
if (bootverbose)
device_printf(args->dev, "decoding %s ports\n",
name);
break;
case CBASMENTRY_ADDRESS_MOD_SUBTRACT:
*flagp = -1;
if (bootverbose)
device_printf(args->dev,
"not decoding %s ports\n", name);
break;
default:
printf(
"MPTable: Unknown compatibility address space modifier: %u\n",
cbasm->address_mod);
break;
}
break;
}
}
void
mptable_pci_host_res_init(device_t pcib)
{
struct host_res_args args;
KASSERT(pci0 != -1, ("do not know how to map PCI bus IDs"));
args.bus = pci_get_bus(pcib) + pci0;
args.dev = pcib;
args.sc = device_get_softc(pcib);
if (pcib_host_res_init(pcib, &args.sc->sc_host_res) != 0)
panic("failed to init hostb resources");
mptable_walk_extended_table(mptable_host_res_handler, &args);
}
#endif
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