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freebsd-nq/sys/kern/subr_smp.c
Steve Passe 4ef5e4e12c Program lint1 to handle NMIs. 
Till now NMIs would be ignored.  Now an NMI is caught by the BSP.
APs still ignore NMI, am working on code to allow a CPU to stop other CPUs
via an IPI.
1997-06-27 22:27:18 +00:00

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/*
* Copyright (c) 1996, by Steve Passe
* 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. 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.
*
* $Id: mp_machdep.c,v 1.22 1997/06/25 21:01:52 fsmp Exp $
*/
#include "opt_smp.h"
#include <sys/param.h> /* for KERNBASE */
#include <sys/types.h>
#include <sys/sysproto.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <vm/vm.h> /* for KERNBASE */
#include <vm/vm_param.h> /* for KERNBASE */
#include <vm/pmap.h> /* for KERNBASE */
#include <machine/pmap.h> /* for KERNBASE */
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
#include <machine/smp.h>
#include <machine/apic.h>
#include <machine/mpapic.h>
#include <machine/cpufunc.h>
#include <machine/segments.h>
#include <machine/smptests.h> /** TEST_DEFAULT_CONFIG */
#include <machine/tss.h>
#include <machine/specialreg.h>
#include <i386/i386/cons.h> /* cngetc() */
#if defined(APIC_IO)
#include <machine/md_var.h> /* setidt() */
#include <i386/isa/icu.h> /* Xinvltlb() */
#include <i386/isa/intr_machdep.h> /* Xinvltlb() */
#endif /* APIC_IO */
#define WARMBOOT_TARGET 0
#define WARMBOOT_OFF (KERNBASE + 0x0467)
#define WARMBOOT_SEG (KERNBASE + 0x0469)
#define BIOS_BASE (0xf0000)
#define BIOS_SIZE (0x10000)
#define BIOS_COUNT (BIOS_SIZE/4)
#define CMOS_REG (0x70)
#define CMOS_DATA (0x71)
#define BIOS_RESET (0x0f)
#define BIOS_WARM (0x0a)
#define PROCENTRY_FLAG_EN 0x01
#define PROCENTRY_FLAG_BP 0x02
#define IOAPICENTRY_FLAG_EN 0x01
/* MP Floating Pointer Structure */
typedef struct MPFPS {
char signature[4];
void *pap;
u_char length;
u_char spec_rev;
u_char checksum;
u_char mpfb1;
u_char mpfb2;
u_char mpfb3;
u_char mpfb4;
u_char mpfb5;
} *mpfps_t;
/* MP Configuration Table Header */
typedef struct MPCTH {
char signature[4];
u_short base_table_length;
u_char spec_rev;
u_char checksum;
u_char oem_id[8];
u_char product_id[12];
void *oem_table_pointer;
u_short oem_table_size;
u_short entry_count;
void *apic_address;
u_short extended_table_length;
u_char extended_table_checksum;
u_char reserved;
} *mpcth_t;
typedef struct PROCENTRY {
u_char type;
u_char apic_id;
u_char apic_version;
u_char cpu_flags;
u_long cpu_signature;
u_long feature_flags;
u_long reserved1;
u_long reserved2;
} *proc_entry_ptr;
typedef struct BUSENTRY {
u_char type;
u_char bus_id;
char bus_type[6];
} *bus_entry_ptr;
typedef struct IOAPICENTRY {
u_char type;
u_char apic_id;
u_char apic_version;
u_char apic_flags;
void *apic_address;
} *io_apic_entry_ptr;
typedef struct INTENTRY {
u_char type;
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;
} *int_entry_ptr;
/* descriptions of MP basetable entries */
typedef struct BASETABLE_ENTRY {
u_char type;
u_char length;
char name[16];
} basetable_entry;
/*
* this code MUST be enabled here and in mpboot.s.
* it follows the very early stages of AP boot by placing values in CMOS ram.
* it NORMALLY will never be needed and thus the primitive method for enabling.
*
#define CHECK_POINTS
*/
#if defined(CHECK_POINTS)
#define CHECK_READ(A) (outb(CMOS_REG, (A)), inb(CMOS_DATA))
#define CHECK_WRITE(A,D) (outb(CMOS_REG, (A)), outb(CMOS_DATA, (D)))
#define CHECK_INIT(D); \
CHECK_WRITE(0x34, (D)); \
CHECK_WRITE(0x35, (D)); \
CHECK_WRITE(0x36, (D)); \
CHECK_WRITE(0x37, (D)); \
CHECK_WRITE(0x38, (D)); \
CHECK_WRITE(0x39, (D));
#define CHECK_PRINT(S); \
printf("%s: %d, %d, %d, %d, %d, %d\n", \
(S), \
CHECK_READ(0x34), \
CHECK_READ(0x35), \
CHECK_READ(0x36), \
CHECK_READ(0x37), \
CHECK_READ(0x38), \
CHECK_READ(0x39));
#else /* CHECK_POINTS */
#define CHECK_INIT(D)
#define CHECK_PRINT(S)
#endif /* CHECK_POINTS */
/** FIXME: what system files declare these??? */
extern struct region_descriptor r_gdt, r_idt;
int mp_ncpus; /* # of CPUs, including BSP */
int mp_naps; /* # of Applications processors */
int mp_nbusses; /* # of busses */
int mp_napics; /* # of IO APICs */
int boot_cpu_id; /* designated BSP */
vm_offset_t cpu_apic_address;
vm_offset_t io_apic_address[NAPICID]; /* NAPICID is more than enough */
u_int32_t cpu_apic_versions[NCPU];
u_int32_t io_apic_versions[NAPIC];
/*
* APIC ID logical/physical mapping structures.
* We oversize these to simplify boot-time config.
*/
int cpu_num_to_apic_id[NAPICID];
int io_num_to_apic_id[NAPICID];
int apic_id_to_logical[NAPICID];
/* Boot of AP uses this PTD */
u_int *bootPTD;
/* Hotwire a 0->4MB V==P mapping */
extern pt_entry_t KPTphys;
/* virtual address of per-cpu common_tss */
extern struct i386tss common_tss;
/*
* look for MP compliant motherboard.
*/
static int mp_capable;
static u_int boot_address;
static u_int base_memory;
static int picmode; /* 0: virtual wire mode, 1: PIC mode */
static mpfps_t mpfps;
static int search_for_sig(u_int32_t target, int count);
static void mp_enable(u_int boot_addr);
static int mptable_pass1(void);
static int mptable_pass2(void);
static void default_mp_table(int type);
static int start_all_aps(u_int boot_addr);
static void install_ap_tramp(u_int boot_addr);
static int start_ap(int logicalCpu, u_int boot_addr);
/*
* calculate usable address in base memory for AP trampoline code
*/
u_int
mp_bootaddress(u_int basemem)
{
base_memory = basemem * 1024; /* convert to bytes */
boot_address = base_memory & ~0xfff; /* round down to 4k boundary */
if ((base_memory - boot_address) < bootMP_size)
boot_address -= 4096; /* not enough, lower by 4k */
return boot_address;
}
int
mp_probe(void)
{
int x;
u_long segment;
u_int32_t target;
/* see if EBDA exists */
if (segment = (u_long) * (u_short *) (KERNBASE + 0x40e)) {
/* 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) (base_memory - 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 */
mpfps = (mpfps_t)0;
mp_capable = 0;
return 0;
found: /* please forgive the 'goto'! */
/* calculate needed resources */
mpfps = (mpfps_t)x;
if (mptable_pass1())
panic("you must reconfigure your kernel");
/* flag fact that we are running multiple processors */
mp_capable = 1;
return 1;
}
/*
* startup the SMP processors
*/
void
mp_start(void)
{
/* look for MP capable motherboard */
if (mp_capable)
mp_enable(boot_address);
else
panic("MP hardware not found!");
}
/*
* print various information about the SMP system hardware and setup
*/
void
mp_announce(void)
{
int x;
printf("FreeBSD/SMP: Multiprocessor motherboard\n");
printf(" cpu0 (BSP): apic id: %d", CPU_TO_ID(0));
printf(", version: 0x%08x", cpu_apic_versions[0]);
printf(", at 0x%08x\n", cpu_apic_address);
for (x = 1; x <= mp_naps; ++x) {
printf(" cpu%d (AP): apic id: %d", x, CPU_TO_ID(x));
printf(", version: 0x%08x", cpu_apic_versions[x]);
printf(", at 0x%08x\n", cpu_apic_address);
}
#if defined(APIC_IO)
for (x = 0; x < mp_napics; ++x) {
printf(" io%d (APIC): apic id: %d", x, IO_TO_ID(x));
printf(", version: 0x%08x", io_apic_versions[x]);
printf(", at 0x%08x\n", io_apic_address[x]);
}
#else
printf(" Warning: APIC I/O disabled\n");
#endif /* APIC_IO */
}
/*
* AP cpu's call this to sync up protected mode.
*/
void
init_secondary(void)
{
int gsel_tss, slot;
r_gdt.rd_limit = sizeof(gdt[0]) * (NGDT + NCPU) - 1;
r_gdt.rd_base = (int) gdt;
lgdt(&r_gdt); /* does magic intra-segment return */
lidt(&r_idt);
lldt(_default_ldt);
slot = NGDT + cpuid;
gsel_tss = GSEL(slot, SEL_KPL);
gdt[slot].sd.sd_type = SDT_SYS386TSS;
common_tss.tss_esp0 = 0; /* not used until after switch */
common_tss.tss_ss0 = GSEL(GDATA_SEL, SEL_KPL);
common_tss.tss_ioopt = (sizeof common_tss) << 16;
ltr(gsel_tss);
load_cr0(0x8005003b); /* XXX! */
PTD[0] = 0;
invltlb();
}
#if defined(APIC_IO)
void
configure_local_apic(void)
{
u_char byte;
u_int32_t temp;
if (picmode) {
outb(0x22, 0x70); /* select IMCR */
byte = inb(0x23); /* current contents */
byte |= 0x01; /* mask external INTR */
outb(0x23, byte); /* disconnect 8259s/NMI */
}
/* mask lint0 (the 8259 'virtual wire' connection) */
temp = lapic.lvt_lint0;
temp |= APIC_LVT_M;
lapic.lvt_lint0 = temp;
/* setup lint1 to handle NMI */
#if 1
/** XXX FIXME:
* should we arrange for ALL CPUs to catch NMI???
* it would probably crash, so for now only the BSP
* will catch it
*/
if (cpuid != 0)
return;
#endif /* 0/1 */
temp = lapic.lvt_lint1;
/* clear fields of interest, preserve undefined fields */
temp &= ~(0x1f000 | APIC_LVT_DM | APIC_LVT_VECTOR);
/* setup for NMI, edge trigger, active hi */
temp |= (APIC_LVT_DM_NMI | APIC_LVT_IIPP_INTAHI);
lapic.lvt_lint1 = temp;
}
#endif /* APIC_IO */
/*******************************************************************
* local functions and data
*/
/*
* start the SMP system
*/
static void
mp_enable(u_int boot_addr)
{
int x;
#if defined(APIC_IO)
int apic;
u_int ux;
#endif /* APIC_IO */
/* Turn on 4MB of V == P addressing so we can get to MP table */
*(int *)PTD = PG_V | PG_RW | ((u_long)KPTphys & PG_FRAME);
invltlb();
/* examine the MP table for needed info, uses physical addresses */
x = mptable_pass2();
*(int *)PTD = 0;
invltlb();
/* can't process default configs till the CPU APIC is pmapped */
if (x)
default_mp_table(x);
#if defined(APIC_IO)
/* fill the LOGICAL io_apic_versions table */
for (apic = 0; apic < mp_napics; ++apic) {
ux = io_apic_read(apic, IOAPIC_VER);
io_apic_versions[apic] = ux;
}
/* program each IO APIC in the system */
for (apic = 0; apic < mp_napics; ++apic)
if (io_apic_setup(apic) < 0)
panic("IO APIC setup failure");
/* install an inter-CPU IPI for TLB invalidation */
setidt(ICU_OFFSET + XINVLTLB_OFFSET, Xinvltlb,
SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
#endif /* APIC_IO */
/* start each Application Processor */
start_all_aps(boot_addr);
/*
* The init process might be started on a different CPU now,
* and the boot CPU might not call prepare_usermode to get
* cr0 correctly configured. Thus we initialize cr0 here.
*/
load_cr0(rcr0() | CR0_WP | CR0_AM);
}
/*
* look for the MP spec signature
*/
/* string defined by the Intel MP Spec as identifying the MP table */
#define MP_SIG 0x5f504d5f /* _MP_ */
#define NEXT(X) ((X) += 4)
static int
search_for_sig(u_int32_t target, int count)
{
int x;
u_int32_t *addr = (u_int32_t *) (KERNBASE + target);
for (x = 0; x < count; NEXT(x))
if (addr[x] == MP_SIG)
/* make array index a byte index */
return (target + (x * sizeof(u_int32_t)));
return -1;
}
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;
} io_int, local_int;
typedef struct BUSTYPENAME {
u_char type;
char name[7];
} bus_type_name;
static bus_type_name bus_type_table[] =
{
{CBUS, "CBUS"},
{CBUSII, "CBUSII"},
{EISA, "EISA"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{ISA, "ISA"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{PCI, "PCI"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{UNKNOWN_BUSTYPE, "---"},
{XPRESS, "XPRESS"},
{UNKNOWN_BUSTYPE, "---"}
};
/* from MP spec v1.4, table 5-1 */
static int default_data[7][5] =
{
/* nbus, id0, type0, id1, type1 */
{1, 0, ISA, 255, 255},
{1, 0, EISA, 255, 255},
{1, 0, EISA, 255, 255},
{0, 255, 255, 255, 255},/* MCA not supported */
{2, 0, ISA, 1, PCI},
{2, 0, EISA, 1, PCI},
{0, 255, 255, 255, 255} /* MCA not supported */
};
/* the bus data */
bus_datum bus_data[NBUS];
/* the IO INT data, one entry per possible APIC INTerrupt */
io_int io_apic_ints[NINTR];
static int nintrs;
static void fix_mp_table __P((void));
static int processor_entry __P((proc_entry_ptr entry, int cpu));
static int bus_entry __P((bus_entry_ptr entry, int bus));
static int io_apic_entry __P((io_apic_entry_ptr entry, int apic));
static int int_entry __P((int_entry_ptr entry, int intr));
static int lookup_bus_type __P((char *name));
/*
* 1st pass on motherboard's Intel MP specification table.
*
* initializes:
* mp_ncpus = 1
*
* determines:
* cpu_apic_address (common to all CPUs)
* io_apic_address[N]
* mp_naps
* mp_nbusses
* mp_napics
* nintrs
*/
static int
mptable_pass1(void)
{
int x;
mpcth_t cth;
int totalSize;
void* position;
int count;
int type;
int mustpanic;
mustpanic = 0;
/* clear various tables */
for (x = 0; x < NAPICID; ++x) {
io_apic_address[x] = ~0; /* IO APIC address table */
}
/* init everything to empty */
mp_naps = 0;
mp_nbusses = 0;
mp_napics = 0;
nintrs = 0;
/* check for use of 'default' configuration */
if (mpfps->mpfb1 != 0) {
/* use default addresses */
cpu_apic_address = DEFAULT_APIC_BASE;
io_apic_address[0] = DEFAULT_IO_APIC_BASE;
/* fill in with defaults */
mp_naps = 2; /* includes BSP */
mp_nbusses = default_data[mpfps->mpfb1 - 1][0];
#if defined(APIC_IO)
mp_napics = 1;
nintrs = 16;
#endif /* APIC_IO */
}
else {
if ((cth = mpfps->pap) == 0)
panic("MP Configuration Table Header MISSING!");
cpu_apic_address = (vm_offset_t) cth->apic_address;
/* walk the table, recording info of interest */
totalSize = cth->base_table_length - sizeof(struct MPCTH);
position = (u_char *) cth + sizeof(struct MPCTH);
count = cth->entry_count;
while (count--) {
switch (type = *(u_char *) position) {
case 0: /* processor_entry */
if (((proc_entry_ptr)position)->cpu_flags
& PROCENTRY_FLAG_EN)
++mp_naps;
break;
case 1: /* bus_entry */
++mp_nbusses;
break;
case 2: /* io_apic_entry */
if (((io_apic_entry_ptr)position)->apic_flags
& IOAPICENTRY_FLAG_EN)
io_apic_address[mp_napics++] =
(vm_offset_t)((io_apic_entry_ptr)
position)->apic_address;
break;
case 3: /* int_entry */
++nintrs;
break;
case 4: /* int_entry */
break;
default:
panic("mpfps Base Table HOSED!");
/* NOTREACHED */
}
totalSize -= basetable_entry_types[type].length;
(u_char*)position += basetable_entry_types[type].length;
}
}
/* qualify the numbers */
if (mp_naps > NCPU)
printf("Warning: only using %d of %d available CPUs!\n",
NCPU, mp_naps);
#if 0
/** XXX we consider this legal now (but should we?) */
mustpanic = 1;
#endif
if (mp_nbusses > NBUS) {
printf("found %d busses, increase NBUS\n", mp_nbusses);
mustpanic = 1;
}
if (mp_napics > NAPIC) {
printf("found %d apics, increase NAPIC\n", mp_napics);
mustpanic = 1;
}
if (nintrs > NINTR) {
printf("found %d intrs, increase NINTR\n", nintrs);
mustpanic = 1;
}
/*
* Count the BSP.
* This is also used as a counter while starting the APs.
*/
mp_ncpus = 1;
--mp_naps; /* subtract the BSP */
return mustpanic;
}
/*
* 2nd pass on motherboard's Intel MP specification table.
*
* sets:
* boot_cpu_id
* ID_TO_IO(N), phy APIC ID to log CPU/IO table
* CPU_TO_ID(N), logical CPU to APIC ID table
* IO_TO_ID(N), logical IO to APIC ID table
* bus_data[N]
* io_apic_ints[N]
*/
static int
mptable_pass2(void)
{
int x;
mpcth_t cth;
int totalSize;
void* position;
int count;
int type;
int apic, bus, cpu, intr;
/* clear various tables */
for (x = 0; x < NAPICID; ++x) {
ID_TO_IO(x) = -1; /* phy APIC ID to log CPU/IO table */
CPU_TO_ID(x) = -1; /* logical CPU to APIC ID table */
IO_TO_ID(x) = -1; /* logical IO to APIC ID table */
}
/* clear bus data table */
for (x = 0; x < NBUS; ++x)
bus_data[x].bus_id = 0xff;
/* clear IO APIC INT table */
for (x = 0; x < NINTR; ++x)
io_apic_ints[x].int_type = 0xff;
/* setup the cpu/apic mapping arrays */
boot_cpu_id = -1;
/* record whether PIC or virtual-wire mode */
picmode = (mpfps->mpfb2 & 0x80) ? 1 : 0;
/* check for use of 'default' configuration */
#if defined(TEST_DEFAULT_CONFIG)
return TEST_DEFAULT_CONFIG;
#else
if (mpfps->mpfb1 != 0)
return mpfps->mpfb1; /* return default configuration type */
#endif /* TEST_DEFAULT_CONFIG */
if ((cth = mpfps->pap) == 0)
panic("MP Configuration Table Header MISSING!");
/* walk the table, recording info of interest */
totalSize = cth->base_table_length - sizeof(struct MPCTH);
position = (u_char *) cth + sizeof(struct MPCTH);
count = cth->entry_count;
apic = bus = intr = 0;
cpu = 1; /* pre-count the BSP */
while (count--) {
switch (type = *(u_char *) position) {
case 0:
if (processor_entry(position, cpu))
++cpu;
break;
case 1:
if (bus_entry(position, bus))
++bus;
break;
case 2:
if (io_apic_entry(position, apic))
++apic;
break;
case 3:
if (int_entry(position, intr))
++intr;
break;
case 4:
/* int_entry(position); */
break;
default:
panic("mpfps Base Table HOSED!");
/* NOTREACHED */
}
totalSize -= basetable_entry_types[type].length;
(u_char *) position += basetable_entry_types[type].length;
}
if (boot_cpu_id == -1)
panic("NO BSP found!");
/* post scan cleanup */
fix_mp_table();
/* report fact that its NOT a default configuration */
return 0;
}
/*
* parse an Intel MP specification table
*/
static void
fix_mp_table(void)
{
int x;
int id;
int bus_0;
int bus_pci;
int num_pci_bus;
/*
* Fix mis-numbering of the PCI bus and its INT entries if the BIOS
* did it wrong. The MP spec says that when more than 1 PCI bus
* exists the BIOS must begin with bus entries for the PCI bus and use
* actual PCI bus numbering. This implies that when only 1 PCI bus
* exists the BIOS can choose to ignore this ordering, and indeed many
* MP motherboards do ignore it. This causes a problem when the PCI
* sub-system makes requests of the MP sub-system based on PCI bus
* numbers. So here we look for the situation and renumber the
* busses and associated INTs in an effort to "make it right".
*/
/* find bus 0, PCI bus, count the number of PCI busses */
for (num_pci_bus = 0, x = 0; x < mp_nbusses; ++x) {
if (bus_data[x].bus_id == 0) {
bus_0 = x;
}
if (bus_data[x].bus_type == PCI) {
++num_pci_bus;
bus_pci = x;
}
}
/*
* bus_0 == slot of bus with ID of 0
* bus_pci == slot of last PCI bus encountered
*/
/* check the 1 PCI bus case for sanity */
if (num_pci_bus == 1) {
/* if it is number 0 all is well */
if (bus_data[bus_pci].bus_id == 0)
return;
/* mis-numbered, swap with whichever bus uses slot 0 */
/* swap the bus entry types */
bus_data[bus_pci].bus_type = bus_data[bus_0].bus_type;
bus_data[bus_0].bus_type = PCI;
/* swap each relavant INTerrupt entry */
id = bus_data[bus_pci].bus_id;
for (x = 0; x < nintrs; ++x) {
if (io_apic_ints[x].src_bus_id == id) {
io_apic_ints[x].src_bus_id = 0;
}
else if (io_apic_ints[x].src_bus_id == 0) {
io_apic_ints[x].src_bus_id = id;
}
}
}
/* sanity check if more than 1 PCI bus */
else if (num_pci_bus > 1) {
for (x = 0; x < mp_nbusses; ++x) {
if (bus_data[x].bus_type != PCI)
continue;
if (bus_data[x].bus_id >= num_pci_bus)
panic("bad PCI bus numbering");
}
}
}
static int
processor_entry(proc_entry_ptr entry, int cpu)
{
/* check for usability */
if ((cpu >= NCPU) || !(entry->cpu_flags & PROCENTRY_FLAG_EN))
return 0;
/* check for BSP flag */
if (entry->cpu_flags & PROCENTRY_FLAG_BP) {
boot_cpu_id = entry->apic_id;
CPU_TO_ID(0) = entry->apic_id;
ID_TO_CPU(entry->apic_id) = 0;
return 0; /* its already been counted */
}
/* add another AP to list, if less than max number of CPUs */
else {
CPU_TO_ID(cpu) = entry->apic_id;
ID_TO_CPU(entry->apic_id) = cpu;
return 1;
}
}
static int
bus_entry(bus_entry_ptr entry, int bus)
{
int x;
char c, name[8];
/* encode the name into an index */
for (x = 0; x < 6; ++x) {
if ((c = entry->bus_type[x]) == ' ')
break;
name[x] = c;
}
name[x] = '\0';
if ((x = lookup_bus_type(name)) == UNKNOWN_BUSTYPE)
panic("unknown bus type: '%s'", name);
bus_data[bus].bus_id = entry->bus_id;
bus_data[bus].bus_type = x;
return 1;
}
static int
io_apic_entry(io_apic_entry_ptr entry, int apic)
{
if (!(entry->apic_flags & IOAPICENTRY_FLAG_EN))
return 0;
IO_TO_ID(apic) = entry->apic_id;
ID_TO_IO(entry->apic_id) = apic;
return 1;
}
static int
lookup_bus_type(char *name)
{
int x;
for (x = 0; x < MAX_BUSTYPE; ++x)
if (strcmp(bus_type_table[x].name, name) == 0)
return bus_type_table[x].type;
return UNKNOWN_BUSTYPE;
}
static int
int_entry(int_entry_ptr entry, int intr)
{
io_apic_ints[intr].int_type = entry->int_type;
io_apic_ints[intr].int_flags = entry->int_flags;
io_apic_ints[intr].src_bus_id = entry->src_bus_id;
io_apic_ints[intr].src_bus_irq = entry->src_bus_irq;
io_apic_ints[intr].dst_apic_id = entry->dst_apic_id;
io_apic_ints[intr].dst_apic_int = entry->dst_apic_int;
return 1;
}
static int
apic_int_is_bus_type(int intr, int bus_type)
{
int bus;
for (bus = 0; bus < mp_nbusses; ++bus)
if ((bus_data[bus].bus_id == io_apic_ints[intr].src_bus_id)
&& ((int) bus_data[bus].bus_type == bus_type))
return 1;
return 0;
}
/*
* Given a traditional ISA INT mask, return an APIC mask.
*/
u_int
isa_apic_mask(u_int isa_mask)
{
int isa_irq;
int apic_pin;
isa_irq = ffs(isa_mask); /* find its bit position */
if (isa_irq == 0) /* doesn't exist */
return 0;
--isa_irq; /* make it zero based */
apic_pin = isa_apic_pin(isa_irq); /* look for APIC connection */
if (apic_pin == -1)
return 0;
return (1 << apic_pin); /* convert pin# to a mask */
}
/*
* Determine which APIC pin an ISA/EISA INT is attached to.
*/
#define INTTYPE(I) (io_apic_ints[(I)].int_type)
#define INTPIN(I) (io_apic_ints[(I)].dst_apic_int)
#define SRCBUSIRQ(I) (io_apic_ints[(I)].src_bus_irq)
int
isa_apic_pin(int isa_irq)
{
int intr;
#if defined(SMP_TIMER_NC)
if (isa_irq == 0)
return -1;
#endif /* SMP_TIMER_NC */
for (intr = 0; intr < nintrs; ++intr) { /* check each record */
if (INTTYPE(intr) == 0) { /* standard INT */
if (SRCBUSIRQ(intr) == isa_irq) {
if (apic_int_is_bus_type(intr, ISA) ||
apic_int_is_bus_type(intr, EISA))
return INTPIN(intr); /* found */
}
}
}
return -1; /* NOT found */
}
#undef SRCBUSIRQ
/*
* Determine which APIC pin a PCI INT is attached to.
*/
#define SRCBUSID(I) (io_apic_ints[(I)].src_bus_id)
#define SRCBUSDEVICE(I) ((io_apic_ints[(I)].src_bus_irq >> 2) & 0x1f)
#define SRCBUSLINE(I) (io_apic_ints[(I)].src_bus_irq & 0x03)
int
pci_apic_pin(int pciBus, int pciDevice, int pciInt)
{
int intr;
--pciInt; /* zero based */
for (intr = 0; intr < nintrs; ++intr) /* check each record */
if ((INTTYPE(intr) == 0) /* standard INT */
&& (SRCBUSID(intr) == pciBus)
&& (SRCBUSDEVICE(intr) == pciDevice)
&& (SRCBUSLINE(intr) == pciInt)) /* a candidate IRQ */
if (apic_int_is_bus_type(intr, PCI))
return INTPIN(intr); /* exact match */
return -1; /* NOT found */
}
#undef SRCBUSLINE
#undef SRCBUSDEVICE
#undef SRCBUSID
#undef INTPIN
#undef INTTYPE
/*
* Reprogram the MB chipset to NOT redirect an ISA INTerrupt.
*
* XXX FIXME:
* Exactly what this means is unclear at this point. It is a solution
* for motherboards that redirect the MBIRQ0 pin. Generically a motherboard
* could route any of the ISA INTs to upper (>15) IRQ values. But most would
* NOT be redirected via MBIRQ0, thus "undirect()ing" them would NOT be an
* option.
*/
int
undirect_isa_irq(int rirq)
{
#if defined(READY)
printf("Freeing redirected ISA irq %d.\n", rirq);
/** FIXME: tickle the MB redirector chip */
return ???;
#else
printf("Freeing (NOT implemented) redirected ISA irq %d.\n", rirq);
return 0;
#endif /* READY */
}
/*
* Reprogram the MB chipset to NOT redirect a PCI INTerrupt
*/
int
undirect_pci_irq(int rirq)
{
#if defined(READY)
if (bootverbose)
printf("Freeing redirected PCI irq %d.\n", rirq);
/** FIXME: tickle the MB redirector chip */
return ???;
#else
if (bootverbose)
printf("Freeing (NOT implemented) redirected PCI irq %d.\n",
rirq);
return 0;
#endif /* READY */
}
/*
* given a bus ID, return:
* the bus type if found
* -1 if NOT found
*/
int
apic_bus_type(int id)
{
int x;
for (x = 0; x < mp_nbusses; ++x)
if (bus_data[x].bus_id == id)
return bus_data[x].bus_type;
return -1;
}
/*
* given a LOGICAL APIC# and pin#, return:
* the associated src bus ID if found
* -1 if NOT found
*/
int
apic_src_bus_id(int apic, int pin)
{
int x;
/* search each of the possible INTerrupt sources */
for (x = 0; x < nintrs; ++x)
if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
(pin == io_apic_ints[x].dst_apic_int))
return (io_apic_ints[x].src_bus_id);
return -1; /* NOT found */
}
/*
* given a LOGICAL APIC# and pin#, return:
* the associated src bus IRQ if found
* -1 if NOT found
*/
int
apic_src_bus_irq(int apic, int pin)
{
int x;
for (x = 0; x < nintrs; x++)
if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
(pin == io_apic_ints[x].dst_apic_int))
return (io_apic_ints[x].src_bus_irq);
return -1; /* NOT found */
}
/*
* given a LOGICAL APIC# and pin#, return:
* the associated INTerrupt type if found
* -1 if NOT found
*/
int
apic_int_type(int apic, int pin)
{
int x;
/* search each of the possible INTerrupt sources */
for (x = 0; x < nintrs; ++x)
if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
(pin == io_apic_ints[x].dst_apic_int))
return (io_apic_ints[x].int_type);
return -1; /* NOT found */
}
/*
* given a LOGICAL APIC# and pin#, return:
* the associated trigger mode if found
* -1 if NOT found
*/
int
apic_trigger(int apic, int pin)
{
int x;
/* search each of the possible INTerrupt sources */
for (x = 0; x < nintrs; ++x)
if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
(pin == io_apic_ints[x].dst_apic_int))
return ((io_apic_ints[x].int_flags >> 2) & 0x03);
return -1; /* NOT found */
}
/*
* given a LOGICAL APIC# and pin#, return:
* the associated 'active' level if found
* -1 if NOT found
*/
int
apic_polarity(int apic, int pin)
{
int x;
/* search each of the possible INTerrupt sources */
for (x = 0; x < nintrs; ++x)
if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
(pin == io_apic_ints[x].dst_apic_int))
return (io_apic_ints[x].int_flags & 0x03);
return -1; /* NOT found */
}
/*
* set data according to MP defaults
* FIXME: probably not complete yet...
*/
static void
default_mp_table(int type)
{
int ap_cpu_id;
#if defined(APIC_IO)
u_int32_t ux;
int io_apic_id;
int pin;
#endif /* APIC_IO */
#if 0
printf(" MP default config type: %d\n", type);
switch (type) {
case 1:
printf(" bus: ISA, APIC: 82489DX\n");
break;
case 2:
printf(" bus: EISA, APIC: 82489DX\n");
break;
case 3:
printf(" bus: EISA, APIC: 82489DX\n");
break;
case 4:
printf(" bus: MCA, APIC: 82489DX\n");
break;
case 5:
printf(" bus: ISA+PCI, APIC: Integrated\n");
break;
case 6:
printf(" bus: EISA+PCI, APIC: Integrated\n");
break;
case 7:
printf(" bus: MCA+PCI, APIC: Integrated\n");
break;
default:
printf(" future type\n");
break;
/* NOTREACHED */
}
#endif /* 0 */
boot_cpu_id = (lapic.id & APIC_ID_MASK) >> 24;
ap_cpu_id = (boot_cpu_id == 0) ? 1 : 0;
/* BSP */
CPU_TO_ID(0) = boot_cpu_id;
ID_TO_CPU(boot_cpu_id) = 0;
/* one and only AP */
CPU_TO_ID(1) = ap_cpu_id;
ID_TO_CPU(ap_cpu_id) = 1;
#if defined(APIC_IO)
/* one and only IO APIC */
io_apic_id = (io_apic_read(0, IOAPIC_ID) & APIC_ID_MASK) >> 24;
/*
* sanity check, refer to MP spec section 3.6.6, last paragraph
* necessary as some hardware isn't properly setting up the IO APIC
*/
#if defined(REALLY_ANAL_IOAPICID_VALUE)
if (io_apic_id != 2) {
#else
if ((io_apic_id == 0) || (io_apic_id == 1) || (io_apic_id == 15)) {
#endif /* REALLY_ANAL_IOAPICID_VALUE */
ux = io_apic_read(0, IOAPIC_ID); /* get current contents */
ux &= ~APIC_ID_MASK; /* clear the ID field */
ux |= 0x02000000; /* set it to '2' */
io_apic_write(0, IOAPIC_ID, ux); /* write new value */
ux = io_apic_read(0, IOAPIC_ID); /* re-read && test */
if ((ux & APIC_ID_MASK) != 0x02000000)
panic("can't control IO APIC ID, reg: 0x%08x", ux);
io_apic_id = 2;
}
IO_TO_ID(0) = io_apic_id;
ID_TO_IO(io_apic_id) = 0;
#endif /* APIC_IO */
/* fill out bus entries */
switch (type) {
case 1:
case 2:
case 3:
case 5:
case 6:
bus_data[0].bus_id = default_data[type - 1][1];
bus_data[0].bus_type = default_data[type - 1][2];
bus_data[1].bus_id = default_data[type - 1][3];
bus_data[1].bus_type = default_data[type - 1][4];
break;
/* case 4: case 7: MCA NOT supported */
default: /* illegal/reserved */
panic("BAD default MP config: %d", type);
/* NOTREACHED */
}
#if defined(APIC_IO)
/* general cases from MP v1.4, table 5-2 */
for (pin = 0; pin < 16; ++pin) {
io_apic_ints[pin].int_type = 0;
io_apic_ints[pin].int_flags = 0x05; /* edge-triggered/active-hi */
io_apic_ints[pin].src_bus_id = 0;
io_apic_ints[pin].src_bus_irq = pin; /* IRQ2 is caught below */
io_apic_ints[pin].dst_apic_id = io_apic_id;
io_apic_ints[pin].dst_apic_int = pin; /* 1-to-1 correspondence */
}
/* special cases from MP v1.4, table 5-2 */
if (type == 2) {
io_apic_ints[2].int_type = 0xff; /* N/C */
io_apic_ints[13].int_type = 0xff; /* N/C */
#if !defined(APIC_MIXED_MODE)
/** FIXME: ??? */
panic("sorry, can't support type 2 default yet");
#endif /* APIC_MIXED_MODE */
}
else
io_apic_ints[2].src_bus_irq = 0; /* ISA IRQ0 is on APIC INT 2 */
if (type == 7)
io_apic_ints[0].int_type = 0xff; /* N/C */
else
io_apic_ints[0].int_type = 3; /* vectored 8259 */
#endif /* APIC_IO */
}
/*
* start each AP in our list
*/
static int
start_all_aps(u_int boot_addr)
{
int x, i;
u_char mpbiosreason;
u_long mpbioswarmvec;
pd_entry_t newptd;
pt_entry_t newpt;
int *newpp;
/**
* NOTE: this needs further thought:
* where does it get released?
* should it be set to empy?
*
* get the initial mp_lock with a count of 1 for the BSP
*/
mp_lock = 1; /* this uses a LOGICAL cpu ID, ie BSP == 0 */
/* initialize BSP's local APIC */
apic_initialize(1);
/* install the AP 1st level boot code */
install_ap_tramp(boot_addr);
/* save the current value of the warm-start vector */
mpbioswarmvec = *((u_long *) WARMBOOT_OFF);
outb(CMOS_REG, BIOS_RESET);
mpbiosreason = inb(CMOS_DATA);
/* start each AP */
for (x = 1; x <= mp_naps; ++x) {
/* HACK HACK HACK !!! */
/* alloc new page table directory */
newptd = (pd_entry_t)(kmem_alloc(kernel_map, PAGE_SIZE));
/* clone currently active one (ie: IdlePTD) */
bcopy(PTD, newptd, PAGE_SIZE); /* inc prv page pde */
/* set up 0 -> 4MB P==V mapping for AP boot */
newptd[0] = PG_V | PG_RW | ((u_long)KPTphys & PG_FRAME);
/* store PTD for this AP */
bootPTD = (pd_entry_t)vtophys(newptd);
/* alloc new page table page */
newpt = (pt_entry_t)(kmem_alloc(kernel_map, PAGE_SIZE));
/* set the new PTD's private page to point there */
newptd[MPPTDI] = PG_V | PG_RW | vtophys(newpt);
/* install self referential entry */
newptd[PTDPTDI] = PG_V | PG_RW | vtophys(newptd);
/* get a new private data page */
newpp = (int *)kmem_alloc(kernel_map, PAGE_SIZE);
/* wire it into the private page table page */
newpt[0] = PG_V | PG_RW | vtophys(newpp);
/* wire the ptp into itself for access */
newpt[1] = PG_V | PG_RW | vtophys(newpt);
/* and the local apic */
newpt[2] = SMP_prvpt[2];
/* and the IO apic mapping[s] */
for (i = 16; i < 32; i++)
newpt[i] = SMP_prvpt[i];
/* prime data page for it to use */
newpp[0] = x; /* cpuid */
newpp[1] = 0; /* curproc */
newpp[2] = 0; /* curpcb */
newpp[3] = 0; /* npxproc */
newpp[4] = 0; /* runtime.tv_sec */
newpp[5] = 0; /* runtime.tv_usec */
newpp[6] = x << 24; /* cpu_lockid */
/* XXX NOTE: ABANDON bootPTD for now!!!! */
/* END REVOLTING HACKERY */
/* setup a vector to our boot code */
*((volatile u_short *) WARMBOOT_OFF) = WARMBOOT_TARGET;
*((volatile u_short *) WARMBOOT_SEG) = (boot_addr >> 4);
outb(CMOS_REG, BIOS_RESET);
outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
/* attempt to start the Application Processor */
CHECK_INIT(99); /* setup checkpoints */
if (!start_ap(x, boot_addr)) {
printf("AP #%d (PHY# %d) failed!\n", x, CPU_TO_ID(x));
CHECK_PRINT("trace"); /* show checkpoints */
/* better panic as the AP may be running loose */
printf("panic y/n? [y] ");
if (cngetc() != 'n')
panic("bye-bye");
}
CHECK_PRINT("trace"); /* show checkpoints */
/* record its version info */
cpu_apic_versions[x] = cpu_apic_versions[0];
}
/* fill in our (BSP) APIC version */
cpu_apic_versions[0] = lapic.version;
/* restore the warmstart vector */
*(u_long *) WARMBOOT_OFF = mpbioswarmvec;
outb(CMOS_REG, BIOS_RESET);
outb(CMOS_DATA, mpbiosreason);
/* number of APs actually started */
return mp_ncpus - 1;
}
/*
* load the 1st level AP boot code into base memory.
*/
/* targets for relocation */
extern void bigJump(void);
extern void bootCodeSeg(void);
extern void bootDataSeg(void);
extern void MPentry(void);
extern u_int MP_GDT;
extern u_int mp_gdtbase;
static void
install_ap_tramp(u_int boot_addr)
{
int x;
int size = *(int *) ((u_long) & bootMP_size);
u_char *src = (u_char *) ((u_long) bootMP);
u_char *dst = (u_char *) boot_addr + KERNBASE;
u_int boot_base = (u_int) bootMP;
u_int8_t *dst8;
u_int16_t *dst16;
u_int32_t *dst32;
for (x = 0; x < size; ++x)
*dst++ = *src++;
/*
* modify addresses in code we just moved to basemem. unfortunately we
* need fairly detailed info about mpboot.s for this to work. changes
* to mpboot.s might require changes here.
*/
/* boot code is located in KERNEL space */
dst = (u_char *) boot_addr + KERNBASE;
/* modify the lgdt arg */
dst32 = (u_int32_t *) (dst + ((u_int) & mp_gdtbase - boot_base));
*dst32 = boot_addr + ((u_int) & MP_GDT - boot_base);
/* modify the ljmp target for MPentry() */
dst32 = (u_int32_t *) (dst + ((u_int) bigJump - boot_base) + 1);
*dst32 = ((u_int) MPentry - KERNBASE);
/* modify the target for boot code segment */
dst16 = (u_int16_t *) (dst + ((u_int) bootCodeSeg - boot_base));
dst8 = (u_int8_t *) (dst16 + 1);
*dst16 = (u_int) boot_addr & 0xffff;
*dst8 = ((u_int) boot_addr >> 16) & 0xff;
/* modify the target for boot data segment */
dst16 = (u_int16_t *) (dst + ((u_int) bootDataSeg - boot_base));
dst8 = (u_int8_t *) (dst16 + 1);
*dst16 = (u_int) boot_addr & 0xffff;
*dst8 = ((u_int) boot_addr >> 16) & 0xff;
}
/*
* this function starts the AP (application processor) identified
* by the APIC ID 'physicalCpu'. It does quite a "song and dance"
* to accomplish this. This is necessary because of the nuances
* of the different hardware we might encounter. It ain't pretty,
* but it seems to work.
*/
static int
start_ap(int logical_cpu, u_int boot_addr)
{
int physical_cpu;
int vector;
int cpus;
u_long icr_lo, icr_hi;
/* get the PHYSICAL APIC ID# */
physical_cpu = CPU_TO_ID(logical_cpu);
/* calculate the vector */
vector = (boot_addr >> 12) & 0xff;
/* used as a watchpoint to signal AP startup */
cpus = mp_ncpus;
/*
* first we do an INIT/RESET IPI this INIT IPI might be run, reseting
* and running the target CPU. OR this INIT IPI might be latched (P5
* bug), CPU waiting for STARTUP IPI. OR this INIT IPI might be
* ignored.
*/
/* setup the address for the target AP */
icr_hi = lapic.icr_hi & ~APIC_ID_MASK;
icr_hi |= (physical_cpu << 24);
lapic.icr_hi = icr_hi;
/* do an INIT IPI: assert RESET */
icr_lo = lapic.icr_lo & 0xfff00000;
lapic.icr_lo = icr_lo | 0x0000c500;
/* wait for pending status end */
while (lapic.icr_lo & APIC_DELSTAT_MASK)
/* spin */ ;
/* do an INIT IPI: deassert RESET */
lapic.icr_lo = icr_lo | 0x00008500;
/* wait for pending status end */
u_sleep(10000); /* wait ~10mS */
while (lapic.icr_lo & APIC_DELSTAT_MASK)
/* spin */ ;
/*
* next we do a STARTUP IPI: the previous INIT IPI might still be
* latched, (P5 bug) this 1st STARTUP would then terminate
* immediately, and the previously started INIT IPI would continue. OR
* the previous INIT IPI has already run. and this STARTUP IPI will
* run. OR the previous INIT IPI was ignored. and this STARTUP IPI
* will run.
*/
/* do a STARTUP IPI */
lapic.icr_lo = icr_lo | 0x00000600 | vector;
while (lapic.icr_lo & APIC_DELSTAT_MASK)
/* spin */ ;
u_sleep(200); /* wait ~200uS */
/*
* finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
* the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
* this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
* recognized after hardware RESET or INIT IPI.
*/
lapic.icr_lo = icr_lo | 0x00000600 | vector;
while (lapic.icr_lo & APIC_DELSTAT_MASK)
/* spin */ ;
u_sleep(200); /* wait ~200uS */
/* wait for it to start */
set_apic_timer(5000000);/* == 5 seconds */
while (read_apic_timer())
if (mp_ncpus > cpus)
return 1; /* return SUCCESS */
return 0; /* return FAILURE */
}
/*
* Flush the TLB on all other CPU's
*
* XXX: Needs to handshake and wait for completion before proceding.
*/
void
smp_invltlb(void)
{
#if defined(APIC_IO)
if (smp_active && invltlb_ok)
all_but_self_ipi(ICU_OFFSET + XINVLTLB_OFFSET);
#endif /* APIC_IO */
}
void
invlpg(u_int addr)
{
__asm __volatile("invlpg (%0)"::"r"(addr):"memory");
/* send a message to the other CPUs */
smp_invltlb();
}
void
invltlb(void)
{
u_long temp;
/*
* This should be implemented as load_cr3(rcr3()) when load_cr3() is
* inlined.
*/
__asm __volatile("movl %%cr3, %0; movl %0, %%cr3":"=r"(temp) :: "memory");
/* send a message to the other CPUs */
smp_invltlb();
}
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