2 * Copyright (c) 1996, by Steve Passe
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. The name of the developer may NOT be used to endorse or promote products
11 * derived from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * $FreeBSD: src/sys/i386/i386/mp_machdep.c,v 1.115.2.15 2003/03/14 21:22:35 jhb Exp $
26 * $DragonFly: src/sys/platform/pc32/i386/mp_machdep.c,v 1.60 2008/06/07 12:03:52 mneumann Exp $
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/sysctl.h>
35 #include <sys/malloc.h>
36 #include <sys/memrange.h>
37 #include <sys/cons.h> /* cngetc() */
38 #include <sys/machintr.h>
40 #include <sys/mplock2.h>
43 #include <vm/vm_param.h>
45 #include <vm/vm_kern.h>
46 #include <vm/vm_extern.h>
48 #include <vm/vm_map.h>
54 #include <machine/smp.h>
55 #include <machine_base/apic/apicreg.h>
56 #include <machine/atomic.h>
57 #include <machine/cpufunc.h>
58 #include <machine_base/apic/mpapic.h>
59 #include <machine/psl.h>
60 #include <machine/segments.h>
61 #include <machine/tss.h>
62 #include <machine/specialreg.h>
63 #include <machine/globaldata.h>
65 #include <machine/md_var.h> /* setidt() */
66 #include <machine_base/icu/icu.h> /* IPIs */
67 #include <machine_base/isa/intr_machdep.h> /* IPIs */
69 #define FIXUP_EXTRA_APIC_INTS 8 /* additional entries we may create */
71 #define WARMBOOT_TARGET 0
72 #define WARMBOOT_OFF (KERNBASE + 0x0467)
73 #define WARMBOOT_SEG (KERNBASE + 0x0469)
75 #define BIOS_BASE (0xf0000)
76 #define BIOS_SIZE (0x10000)
77 #define BIOS_COUNT (BIOS_SIZE/4)
79 #define CMOS_REG (0x70)
80 #define CMOS_DATA (0x71)
81 #define BIOS_RESET (0x0f)
82 #define BIOS_WARM (0x0a)
84 #define PROCENTRY_FLAG_EN 0x01
85 #define PROCENTRY_FLAG_BP 0x02
86 #define IOAPICENTRY_FLAG_EN 0x01
89 /* MP Floating Pointer Structure */
90 typedef struct MPFPS {
103 /* MP Configuration Table Header */
104 typedef struct MPCTH {
106 u_short base_table_length;
110 u_char product_id[12];
111 u_int32_t oem_table_pointer;
112 u_short oem_table_size;
114 u_int32_t apic_address;
115 u_short extended_table_length;
116 u_char extended_table_checksum;
121 typedef struct PROCENTRY {
126 u_int32_t cpu_signature;
127 u_int32_t feature_flags;
132 typedef struct BUSENTRY {
138 typedef struct IOAPICENTRY {
143 u_int32_t apic_address;
144 } *io_apic_entry_ptr;
146 typedef struct INTENTRY {
156 /* descriptions of MP basetable entries */
157 typedef struct BASETABLE_ENTRY {
166 vm_size_t mp_cth_mapsz;
170 * this code MUST be enabled here and in mpboot.s.
171 * it follows the very early stages of AP boot by placing values in CMOS ram.
172 * it NORMALLY will never be needed and thus the primitive method for enabling.
175 #if defined(CHECK_POINTS)
176 #define CHECK_READ(A) (outb(CMOS_REG, (A)), inb(CMOS_DATA))
177 #define CHECK_WRITE(A,D) (outb(CMOS_REG, (A)), outb(CMOS_DATA, (D)))
179 #define CHECK_INIT(D); \
180 CHECK_WRITE(0x34, (D)); \
181 CHECK_WRITE(0x35, (D)); \
182 CHECK_WRITE(0x36, (D)); \
183 CHECK_WRITE(0x37, (D)); \
184 CHECK_WRITE(0x38, (D)); \
185 CHECK_WRITE(0x39, (D));
187 #define CHECK_PRINT(S); \
188 kprintf("%s: %d, %d, %d, %d, %d, %d\n", \
197 #else /* CHECK_POINTS */
199 #define CHECK_INIT(D)
200 #define CHECK_PRINT(S)
202 #endif /* CHECK_POINTS */
205 * Values to send to the POST hardware.
207 #define MP_BOOTADDRESS_POST 0x10
208 #define MP_PROBE_POST 0x11
209 #define MPTABLE_PASS1_POST 0x12
211 #define MP_START_POST 0x13
212 #define MP_ENABLE_POST 0x14
213 #define MPTABLE_PASS2_POST 0x15
215 #define START_ALL_APS_POST 0x16
216 #define INSTALL_AP_TRAMP_POST 0x17
217 #define START_AP_POST 0x18
219 #define MP_ANNOUNCE_POST 0x19
221 static int need_hyperthreading_fixup;
222 static u_int logical_cpus;
223 u_int logical_cpus_mask;
225 static int madt_probe_test;
226 TUNABLE_INT("hw.madt_probe_test", &madt_probe_test);
228 /** XXX FIXME: where does this really belong, isa.h/isa.c perhaps? */
229 int current_postcode;
231 /** XXX FIXME: what system files declare these??? */
232 extern struct region_descriptor r_gdt, r_idt;
234 int bsp_apic_ready = 0; /* flags useability of BSP apic */
235 int mp_naps; /* # of Applications processors */
236 int mp_nbusses; /* # of busses */
238 int mp_napics; /* # of IO APICs */
240 vm_offset_t cpu_apic_address;
242 vm_offset_t io_apic_address[NAPICID]; /* NAPICID is more than enough */
243 u_int32_t *io_apic_versions;
247 u_int32_t cpu_apic_versions[MAXCPU];
249 extern int64_t tsc_offsets[];
251 extern u_long ebda_addr;
254 struct apic_intmapinfo int_to_apicintpin[APIC_INTMAPSIZE];
258 * APIC ID logical/physical mapping structures.
259 * We oversize these to simplify boot-time config.
261 int cpu_num_to_apic_id[NAPICID];
263 int io_num_to_apic_id[NAPICID];
265 int apic_id_to_logical[NAPICID];
267 /* AP uses this during bootstrap. Do not staticize. */
272 * SMP page table page. Setup by locore to point to a page table
273 * page from which we allocate per-cpu privatespace areas io_apics,
277 #define IO_MAPPING_START_INDEX \
278 (SMP_MAXCPU * sizeof(struct privatespace) / PAGE_SIZE)
280 extern pt_entry_t *SMPpt;
282 struct pcb stoppcbs[MAXCPU];
284 extern inthand_t IDTVEC(fast_syscall), IDTVEC(fast_syscall32);
287 * Local data and functions.
290 static u_int boot_address;
291 static u_int base_memory;
292 static int mp_finish;
294 static void mp_enable(u_int boot_addr);
296 static int mptable_probe(void);
297 static long mptable_search_sig(u_int32_t target, int count);
298 static void mptable_hyperthread_fixup(u_int id_mask);
299 static void mptable_pass1(struct mptable_pos *);
300 static int mptable_pass2(struct mptable_pos *);
301 static void mptable_default(int type);
302 static void mptable_fix(void);
303 static void mptable_map(struct mptable_pos *, vm_paddr_t);
304 static void mptable_unmap(struct mptable_pos *);
307 static void setup_apic_irq_mapping(void);
308 static int apic_int_is_bus_type(int intr, int bus_type);
310 static int start_all_aps(u_int boot_addr);
312 static void install_ap_tramp(u_int boot_addr);
314 static int start_ap(struct mdglobaldata *gd, u_int boot_addr, int smibest);
315 static int smitest(void);
317 static cpumask_t smp_startup_mask = 1; /* which cpus have been started */
318 cpumask_t smp_active_mask = 1; /* which cpus are ready for IPIs etc? */
319 SYSCTL_INT(_machdep, OID_AUTO, smp_active, CTLFLAG_RD, &smp_active_mask, 0, "");
320 static u_int bootMP_size;
323 * Calculate usable address in base memory for AP trampoline code.
326 mp_bootaddress(u_int basemem)
328 POSTCODE(MP_BOOTADDRESS_POST);
330 base_memory = basemem;
332 bootMP_size = mptramp_end - mptramp_start;
333 boot_address = trunc_page(basemem * 1024); /* round down to 4k boundary */
334 if (((basemem * 1024) - boot_address) < bootMP_size)
335 boot_address -= PAGE_SIZE; /* not enough, lower by 4k */
336 /* 3 levels of page table pages */
337 mptramp_pagetables = boot_address - (PAGE_SIZE * 3);
339 return mptramp_pagetables;
344 * Look for an Intel MP spec table (ie, SMP capable hardware).
353 * Make sure our SMPpt[] page table is big enough to hold all the
356 KKASSERT(IO_MAPPING_START_INDEX < NPTEPG - 2);
358 POSTCODE(MP_PROBE_POST);
360 /* see if EBDA exists */
361 if (ebda_addr != 0) {
362 /* search first 1K of EBDA */
363 target = (u_int32_t)ebda_addr;
364 if ((x = mptable_search_sig(target, 1024 / 4)) > 0)
367 /* last 1K of base memory, effective 'top of base' passed in */
368 target = (u_int32_t)(base_memory - 0x400);
369 if ((x = mptable_search_sig(target, 1024 / 4)) > 0)
373 /* search the BIOS */
374 target = (u_int32_t)BIOS_BASE;
375 if ((x = mptable_search_sig(target, BIOS_COUNT)) > 0)
384 * Startup the SMP processors.
389 POSTCODE(MP_START_POST);
390 mp_enable(boot_address);
395 * Print various information about the SMP system hardware and setup.
402 POSTCODE(MP_ANNOUNCE_POST);
404 kprintf("DragonFly/MP: Multiprocessor motherboard\n");
405 kprintf(" cpu0 (BSP): apic id: %2d", CPU_TO_ID(0));
406 kprintf(", version: 0x%08x", cpu_apic_versions[0]);
407 kprintf(", at 0x%08jx\n", (intmax_t)cpu_apic_address);
408 for (x = 1; x <= mp_naps; ++x) {
409 kprintf(" cpu%d (AP): apic id: %2d", x, CPU_TO_ID(x));
410 kprintf(", version: 0x%08x", cpu_apic_versions[x]);
411 kprintf(", at 0x%08jx\n", (intmax_t)cpu_apic_address);
415 for (x = 0; x < mp_napics; ++x) {
416 kprintf(" io%d (APIC): apic id: %2d", x, IO_TO_ID(x));
417 kprintf(", version: 0x%08x", io_apic_versions[x]);
418 kprintf(", at 0x%08lx\n", io_apic_address[x]);
421 kprintf(" Warning: APIC I/O disabled\n");
426 * AP cpu's call this to sync up protected mode.
428 * WARNING! %gs is not set up on entry. This routine sets up %gs.
434 int x, myid = bootAP;
436 struct mdglobaldata *md;
437 struct privatespace *ps;
439 ps = &CPU_prvspace[myid];
441 gdt_segs[GPROC0_SEL].ssd_base =
442 (long) &ps->mdglobaldata.gd_common_tss;
443 ps->mdglobaldata.mi.gd_prvspace = ps;
445 /* We fill the 32-bit segment descriptors */
446 for (x = 0; x < NGDT; x++) {
447 if (x != GPROC0_SEL && x != (GPROC0_SEL + 1))
448 ssdtosd(&gdt_segs[x], &gdt[myid * NGDT + x]);
450 /* And now a 64-bit one */
451 ssdtosyssd(&gdt_segs[GPROC0_SEL],
452 (struct system_segment_descriptor *)&gdt[myid * NGDT + GPROC0_SEL]);
454 r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1;
455 r_gdt.rd_base = (long) &gdt[myid * NGDT];
456 lgdt(&r_gdt); /* does magic intra-segment return */
458 /* lgdt() destroys the GSBASE value, so we load GSBASE after lgdt() */
459 wrmsr(MSR_FSBASE, 0); /* User value */
460 wrmsr(MSR_GSBASE, (u_int64_t)ps);
461 wrmsr(MSR_KGSBASE, 0); /* XXX User value while we're in the kernel */
467 mdcpu->gd_currentldt = _default_ldt;
470 gsel_tss = GSEL(GPROC0_SEL, SEL_KPL);
471 gdt[myid * NGDT + GPROC0_SEL].sd_type = SDT_SYSTSS;
473 md = mdcpu; /* loaded through %gs:0 (mdglobaldata.mi.gd_prvspace)*/
475 md->gd_common_tss.tss_rsp0 = 0; /* not used until after switch */
477 md->gd_common_tss.tss_ioopt = (sizeof md->gd_common_tss) << 16;
479 md->gd_tss_gdt = &gdt[myid * NGDT + GPROC0_SEL];
480 md->gd_common_tssd = *md->gd_tss_gdt;
482 md->gd_common_tss.tss_ist1 = (long)&doublefault_stack[PAGE_SIZE];
487 * Set to a known state:
488 * Set by mpboot.s: CR0_PG, CR0_PE
489 * Set by cpu_setregs: CR0_NE, CR0_MP, CR0_TS, CR0_WP, CR0_AM
492 cr0 &= ~(CR0_CD | CR0_NW | CR0_EM);
495 /* Set up the fast syscall stuff */
496 msr = rdmsr(MSR_EFER) | EFER_SCE;
497 wrmsr(MSR_EFER, msr);
498 wrmsr(MSR_LSTAR, (u_int64_t)IDTVEC(fast_syscall));
499 wrmsr(MSR_CSTAR, (u_int64_t)IDTVEC(fast_syscall32));
500 msr = ((u_int64_t)GSEL(GCODE_SEL, SEL_KPL) << 32) |
501 ((u_int64_t)GSEL(GUCODE32_SEL, SEL_UPL) << 48);
502 wrmsr(MSR_STAR, msr);
503 wrmsr(MSR_SF_MASK, PSL_NT|PSL_T|PSL_I|PSL_C|PSL_D);
505 pmap_set_opt(); /* PSE/4MB pages, etc */
507 /* Initialize the PAT MSR. */
511 /* set up CPU registers and state */
514 /* set up SSE/NX registers */
517 /* set up FPU state on the AP */
518 npxinit(__INITIAL_NPXCW__);
520 /* disable the APIC, just to be SURE */
521 lapic->svr &= ~APIC_SVR_ENABLE;
523 /* data returned to BSP */
524 cpu_apic_versions[0] = lapic->version;
527 /*******************************************************************
528 * local functions and data
532 * start the SMP system
535 mp_enable(u_int boot_addr)
542 vm_paddr_t mpfps_paddr;
544 POSTCODE(MP_ENABLE_POST);
549 mpfps_paddr = mptable_probe();
552 struct mptable_pos mpt;
554 mptable_map(&mpt, mpfps_paddr);
557 * We can safely map physical memory into SMPpt after
558 * mptable_pass1() completes.
562 if (cpu_apic_address == 0)
563 panic("mp_enable: no local apic!\n");
565 /* examine the MP table for needed info */
566 x = mptable_pass2(&mpt);
571 * can't process default configs till the
572 * CPU APIC is pmapped
577 /* post scan cleanup */
580 vm_paddr_t madt_paddr;
583 madt_paddr = madt_probe();
585 panic("mp_enable: madt_probe failed\n");
587 cpu_apic_address = madt_pass1(madt_paddr);
588 if (cpu_apic_address == 0)
589 panic("mp_enable: no local apic (madt)!\n");
591 bsp_apic_id = (lapic.id & 0xff000000) >> 24;
592 if (madt_pass2(madt_paddr, bsp_apic_id))
593 panic("mp_enable: madt_pass2 failed\n");
598 setup_apic_irq_mapping();
600 /* fill the LOGICAL io_apic_versions table */
601 for (apic = 0; apic < mp_napics; ++apic) {
602 ux = io_apic_read(apic, IOAPIC_VER);
603 io_apic_versions[apic] = ux;
604 io_apic_set_id(apic, IO_TO_ID(apic));
607 /* program each IO APIC in the system */
608 for (apic = 0; apic < mp_napics; ++apic)
609 if (io_apic_setup(apic) < 0)
610 panic("IO APIC setup failure");
615 * These are required for SMP operation
618 /* install a 'Spurious INTerrupt' vector */
619 setidt(XSPURIOUSINT_OFFSET, Xspuriousint,
620 SDT_SYSIGT, SEL_KPL, 0);
622 /* install an inter-CPU IPI for TLB invalidation */
623 setidt(XINVLTLB_OFFSET, Xinvltlb,
624 SDT_SYSIGT, SEL_KPL, 0);
626 /* install an inter-CPU IPI for IPIQ messaging */
627 setidt(XIPIQ_OFFSET, Xipiq,
628 SDT_SYSIGT, SEL_KPL, 0);
630 /* install a timer vector */
631 setidt(XTIMER_OFFSET, Xtimer,
632 SDT_SYSIGT, SEL_KPL, 0);
634 /* install an inter-CPU IPI for CPU stop/restart */
635 setidt(XCPUSTOP_OFFSET, Xcpustop,
636 SDT_SYSIGT, SEL_KPL, 0);
638 /* start each Application Processor */
639 start_all_aps(boot_addr);
644 * look for the MP spec signature
647 /* string defined by the Intel MP Spec as identifying the MP table */
648 #define MP_SIG 0x5f504d5f /* _MP_ */
649 #define NEXT(X) ((X) += 4)
651 mptable_search_sig(u_int32_t target, int count)
657 KKASSERT(target != 0);
659 map_size = count * sizeof(u_int32_t);
660 addr = pmap_mapdev((vm_paddr_t)target, map_size);
663 for (x = 0; x < count; NEXT(x)) {
664 if (addr[x] == MP_SIG) {
665 /* make array index a byte index */
666 ret = target + (x * sizeof(u_int32_t));
671 pmap_unmapdev((vm_offset_t)addr, map_size);
676 static basetable_entry basetable_entry_types[] =
678 {0, 20, "Processor"},
685 typedef struct BUSDATA {
687 enum busTypes bus_type;
690 typedef struct INTDATA {
700 typedef struct BUSTYPENAME {
705 static bus_type_name bus_type_table[] =
711 {UNKNOWN_BUSTYPE, "---"},
714 {UNKNOWN_BUSTYPE, "---"},
715 {UNKNOWN_BUSTYPE, "---"},
716 {UNKNOWN_BUSTYPE, "---"},
717 {UNKNOWN_BUSTYPE, "---"},
718 {UNKNOWN_BUSTYPE, "---"},
720 {UNKNOWN_BUSTYPE, "---"},
721 {UNKNOWN_BUSTYPE, "---"},
722 {UNKNOWN_BUSTYPE, "---"},
723 {UNKNOWN_BUSTYPE, "---"},
725 {UNKNOWN_BUSTYPE, "---"}
727 /* from MP spec v1.4, table 5-1 */
728 static int default_data[7][5] =
730 /* nbus, id0, type0, id1, type1 */
731 {1, 0, ISA, 255, 255},
732 {1, 0, EISA, 255, 255},
733 {1, 0, EISA, 255, 255},
734 {1, 0, MCA, 255, 255},
736 {2, 0, EISA, 1, PCI},
742 static bus_datum *bus_data;
745 /* the IO INT data, one entry per possible APIC INTerrupt */
746 static io_int *io_apic_ints;
750 static int processor_entry (proc_entry_ptr entry, int cpu);
751 static int bus_entry (bus_entry_ptr entry, int bus);
753 static int io_apic_entry (io_apic_entry_ptr entry, int apic);
754 static int int_entry (int_entry_ptr entry, int intr);
756 static int lookup_bus_type (char *name);
760 * 1st pass on motherboard's Intel MP specification table.
763 * cpu_apic_address (common to all CPUs)
769 * need_hyperthreading_fixup
773 mptable_pass1(struct mptable_pos *mpt)
786 POSTCODE(MPTABLE_PASS1_POST);
789 KKASSERT(fps != NULL);
792 /* clear various tables */
793 for (x = 0; x < NAPICID; ++x) {
794 io_apic_address[x] = ~0; /* IO APIC address table */
798 /* init everything to empty */
807 /* check for use of 'default' configuration */
808 if (fps->mpfb1 != 0) {
809 /* use default addresses */
810 cpu_apic_address = DEFAULT_APIC_BASE;
812 io_apic_address[0] = DEFAULT_IO_APIC_BASE;
815 /* fill in with defaults */
816 mp_naps = 2; /* includes BSP */
817 mp_nbusses = default_data[fps->mpfb1 - 1][0];
826 panic("MP Configuration Table Header MISSING!");
828 cpu_apic_address = (vm_offset_t) cth->apic_address;
830 /* walk the table, recording info of interest */
831 totalSize = cth->base_table_length - sizeof(struct MPCTH);
832 position = (u_char *) cth + sizeof(struct MPCTH);
833 count = cth->entry_count;
836 switch (type = *(u_char *) position) {
837 case 0: /* processor_entry */
838 if (((proc_entry_ptr)position)->cpu_flags
839 & PROCENTRY_FLAG_EN) {
842 ((proc_entry_ptr)position)->apic_id;
845 case 1: /* bus_entry */
848 case 2: /* io_apic_entry */
850 if (((io_apic_entry_ptr)position)->apic_flags
851 & IOAPICENTRY_FLAG_EN)
852 io_apic_address[mp_napics++] =
853 (vm_offset_t)((io_apic_entry_ptr)
854 position)->apic_address;
857 case 3: /* int_entry */
862 case 4: /* int_entry */
865 panic("mpfps Base Table HOSED!");
869 totalSize -= basetable_entry_types[type].length;
870 position = (uint8_t *)position +
871 basetable_entry_types[type].length;
875 /* qualify the numbers */
876 if (mp_naps > MAXCPU) {
877 kprintf("Warning: only using %d of %d available CPUs!\n",
882 /* See if we need to fixup HT logical CPUs. */
883 mptable_hyperthread_fixup(id_mask);
885 --mp_naps; /* subtract the BSP */
890 * 2nd pass on motherboard's Intel MP specification table.
894 * ID_TO_IO(N), phy APIC ID to log CPU/IO table
895 * CPU_TO_ID(N), logical CPU to APIC ID table
896 * IO_TO_ID(N), logical IO to APIC ID table
901 mptable_pass2(struct mptable_pos *mpt)
903 struct PROCENTRY proc;
911 int apic, bus, cpu, intr;
914 POSTCODE(MPTABLE_PASS2_POST);
917 KKASSERT(fps != NULL);
919 /* Initialize fake proc entry for use with HT fixup. */
920 bzero(&proc, sizeof(proc));
922 proc.cpu_flags = PROCENTRY_FLAG_EN;
925 MALLOC(io_apic_versions, u_int32_t *, sizeof(u_int32_t) * mp_napics,
927 MALLOC(ioapic, volatile ioapic_t **, sizeof(ioapic_t *) * mp_napics,
928 M_DEVBUF, M_WAITOK | M_ZERO);
929 MALLOC(io_apic_ints, io_int *, sizeof(io_int) * (nintrs + FIXUP_EXTRA_APIC_INTS),
932 MALLOC(bus_data, bus_datum *, sizeof(bus_datum) * mp_nbusses,
936 for (i = 0; i < mp_napics; i++) {
937 ioapic[i] = permanent_io_mapping(io_apic_address[i]);
941 /* clear various tables */
942 for (x = 0; x < NAPICID; ++x) {
943 CPU_TO_ID(x) = -1; /* logical CPU to APIC ID table */
945 ID_TO_IO(x) = -1; /* phy APIC ID to log CPU/IO table */
946 IO_TO_ID(x) = -1; /* logical IO to APIC ID table */
950 /* clear bus data table */
951 for (x = 0; x < mp_nbusses; ++x)
952 bus_data[x].bus_id = 0xff;
955 /* clear IO APIC INT table */
956 for (x = 0; x < (nintrs + 1); ++x) {
957 io_apic_ints[x].int_type = 0xff;
958 io_apic_ints[x].int_vector = 0xff;
962 /* record whether PIC or virtual-wire mode */
963 machintr_setvar_simple(MACHINTR_VAR_IMCR_PRESENT, fps->mpfb2 & 0x80);
965 /* check for use of 'default' configuration */
967 return fps->mpfb1; /* return default configuration type */
971 panic("MP Configuration Table Header MISSING!");
973 /* walk the table, recording info of interest */
974 totalSize = cth->base_table_length - sizeof(struct MPCTH);
975 position = (u_char *) cth + sizeof(struct MPCTH);
976 count = cth->entry_count;
977 apic = bus = intr = 0;
978 cpu = 1; /* pre-count the BSP */
981 switch (type = *(u_char *) position) {
983 if (processor_entry(position, cpu))
986 if (need_hyperthreading_fixup) {
988 * Create fake mptable processor entries
989 * and feed them to processor_entry() to
990 * enumerate the logical CPUs.
992 proc.apic_id = ((proc_entry_ptr)position)->apic_id;
993 for (i = 1; i < logical_cpus; i++) {
995 processor_entry(&proc, cpu);
996 logical_cpus_mask |= (1 << cpu);
1002 if (bus_entry(position, bus))
1007 if (io_apic_entry(position, apic))
1013 if (int_entry(position, intr))
1018 /* int_entry(position); */
1021 panic("mpfps Base Table HOSED!");
1025 totalSize -= basetable_entry_types[type].length;
1026 position = (uint8_t *)position + basetable_entry_types[type].length;
1029 if (CPU_TO_ID(0) < 0)
1030 panic("NO BSP found!");
1032 /* report fact that its NOT a default configuration */
1038 * Check if we should perform a hyperthreading "fix-up" to
1039 * enumerate any logical CPU's that aren't already listed
1042 * XXX: We assume that all of the physical CPUs in the
1043 * system have the same number of logical CPUs.
1045 * XXX: We assume that APIC ID's are allocated such that
1046 * the APIC ID's for a physical processor are aligned
1047 * with the number of logical CPU's in the processor.
1050 mptable_hyperthread_fixup(u_int id_mask)
1054 /* Nothing to do if there is no HTT support. */
1055 if ((cpu_feature & CPUID_HTT) == 0)
1057 logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
1058 if (logical_cpus <= 1)
1062 * For each APIC ID of a CPU that is set in the mask,
1063 * scan the other candidate APIC ID's for this
1064 * physical processor. If any of those ID's are
1065 * already in the table, then kill the fixup.
1067 for (id = 0; id <= MAXCPU; id++) {
1068 if ((id_mask & 1 << id) == 0)
1070 /* First, make sure we are on a logical_cpus boundary. */
1071 if (id % logical_cpus != 0)
1073 for (i = id + 1; i < id + logical_cpus; i++)
1074 if ((id_mask & 1 << i) != 0)
1079 * Ok, the ID's checked out, so enable the fixup. We have to fixup
1080 * mp_naps right now.
1082 need_hyperthreading_fixup = 1;
1083 mp_naps *= logical_cpus;
1087 mptable_map(struct mptable_pos *mpt, vm_paddr_t mpfps_paddr)
1091 vm_size_t cth_mapsz = 0;
1093 fps = pmap_mapdev(mpfps_paddr, sizeof(*fps));
1094 if (fps->pap != 0) {
1096 * Map configuration table header to get
1097 * the base table size
1099 cth = pmap_mapdev(fps->pap, sizeof(*cth));
1100 cth_mapsz = cth->base_table_length;
1101 pmap_unmapdev((vm_offset_t)cth, sizeof(*cth));
1104 * Map the base table
1106 cth = pmap_mapdev(fps->pap, cth_mapsz);
1111 mpt->mp_cth_mapsz = cth_mapsz;
1115 mptable_unmap(struct mptable_pos *mpt)
1117 if (mpt->mp_cth != NULL) {
1118 pmap_unmapdev((vm_offset_t)mpt->mp_cth, mpt->mp_cth_mapsz);
1120 mpt->mp_cth_mapsz = 0;
1122 if (mpt->mp_fps != NULL) {
1123 pmap_unmapdev((vm_offset_t)mpt->mp_fps, sizeof(*mpt->mp_fps));
1131 assign_apic_irq(int apic, int intpin, int irq)
1135 if (int_to_apicintpin[irq].ioapic != -1)
1136 panic("assign_apic_irq: inconsistent table");
1138 int_to_apicintpin[irq].ioapic = apic;
1139 int_to_apicintpin[irq].int_pin = intpin;
1140 int_to_apicintpin[irq].apic_address = ioapic[apic];
1141 int_to_apicintpin[irq].redirindex = IOAPIC_REDTBL + 2 * intpin;
1143 for (x = 0; x < nintrs; x++) {
1144 if ((io_apic_ints[x].int_type == 0 ||
1145 io_apic_ints[x].int_type == 3) &&
1146 io_apic_ints[x].int_vector == 0xff &&
1147 io_apic_ints[x].dst_apic_id == IO_TO_ID(apic) &&
1148 io_apic_ints[x].dst_apic_int == intpin)
1149 io_apic_ints[x].int_vector = irq;
1154 revoke_apic_irq(int irq)
1160 if (int_to_apicintpin[irq].ioapic == -1)
1161 panic("revoke_apic_irq: inconsistent table");
1163 oldapic = int_to_apicintpin[irq].ioapic;
1164 oldintpin = int_to_apicintpin[irq].int_pin;
1166 int_to_apicintpin[irq].ioapic = -1;
1167 int_to_apicintpin[irq].int_pin = 0;
1168 int_to_apicintpin[irq].apic_address = NULL;
1169 int_to_apicintpin[irq].redirindex = 0;
1171 for (x = 0; x < nintrs; x++) {
1172 if ((io_apic_ints[x].int_type == 0 ||
1173 io_apic_ints[x].int_type == 3) &&
1174 io_apic_ints[x].int_vector != 0xff &&
1175 io_apic_ints[x].dst_apic_id == IO_TO_ID(oldapic) &&
1176 io_apic_ints[x].dst_apic_int == oldintpin)
1177 io_apic_ints[x].int_vector = 0xff;
1185 allocate_apic_irq(int intr)
1191 if (io_apic_ints[intr].int_vector != 0xff)
1192 return; /* Interrupt handler already assigned */
1194 if (io_apic_ints[intr].int_type != 0 &&
1195 (io_apic_ints[intr].int_type != 3 ||
1196 (io_apic_ints[intr].dst_apic_id == IO_TO_ID(0) &&
1197 io_apic_ints[intr].dst_apic_int == 0)))
1198 return; /* Not INT or ExtInt on != (0, 0) */
1201 while (irq < APIC_INTMAPSIZE &&
1202 int_to_apicintpin[irq].ioapic != -1)
1205 if (irq >= APIC_INTMAPSIZE)
1206 return; /* No free interrupt handlers */
1208 apic = ID_TO_IO(io_apic_ints[intr].dst_apic_id);
1209 intpin = io_apic_ints[intr].dst_apic_int;
1211 assign_apic_irq(apic, intpin, irq);
1216 swap_apic_id(int apic, int oldid, int newid)
1223 return; /* Nothing to do */
1225 kprintf("Changing APIC ID for IO APIC #%d from %d to %d in MP table\n",
1226 apic, oldid, newid);
1228 /* Swap physical APIC IDs in interrupt entries */
1229 for (x = 0; x < nintrs; x++) {
1230 if (io_apic_ints[x].dst_apic_id == oldid)
1231 io_apic_ints[x].dst_apic_id = newid;
1232 else if (io_apic_ints[x].dst_apic_id == newid)
1233 io_apic_ints[x].dst_apic_id = oldid;
1236 /* Swap physical APIC IDs in IO_TO_ID mappings */
1237 for (oapic = 0; oapic < mp_napics; oapic++)
1238 if (IO_TO_ID(oapic) == newid)
1241 if (oapic < mp_napics) {
1242 kprintf("Changing APIC ID for IO APIC #%d from "
1243 "%d to %d in MP table\n",
1244 oapic, newid, oldid);
1245 IO_TO_ID(oapic) = oldid;
1247 IO_TO_ID(apic) = newid;
1252 fix_id_to_io_mapping(void)
1256 for (x = 0; x < NAPICID; x++)
1259 for (x = 0; x <= mp_naps; x++)
1260 if (CPU_TO_ID(x) < NAPICID)
1261 ID_TO_IO(CPU_TO_ID(x)) = x;
1263 for (x = 0; x < mp_napics; x++)
1264 if (IO_TO_ID(x) < NAPICID)
1265 ID_TO_IO(IO_TO_ID(x)) = x;
1270 first_free_apic_id(void)
1274 for (freeid = 0; freeid < NAPICID; freeid++) {
1275 for (x = 0; x <= mp_naps; x++)
1276 if (CPU_TO_ID(x) == freeid)
1280 for (x = 0; x < mp_napics; x++)
1281 if (IO_TO_ID(x) == freeid)
1292 io_apic_id_acceptable(int apic, int id)
1294 int cpu; /* Logical CPU number */
1295 int oapic; /* Logical IO APIC number for other IO APIC */
1298 return 0; /* Out of range */
1300 for (cpu = 0; cpu <= mp_naps; cpu++)
1301 if (CPU_TO_ID(cpu) == id)
1302 return 0; /* Conflict with CPU */
1304 for (oapic = 0; oapic < mp_napics && oapic < apic; oapic++)
1305 if (IO_TO_ID(oapic) == id)
1306 return 0; /* Conflict with other APIC */
1308 return 1; /* ID is acceptable for IO APIC */
1313 io_apic_find_int_entry(int apic, int pin)
1317 /* search each of the possible INTerrupt sources */
1318 for (x = 0; x < nintrs; ++x) {
1319 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1320 (pin == io_apic_ints[x].dst_apic_int))
1321 return (&io_apic_ints[x]);
1329 * parse an Intel MP specification table
1337 int apic; /* IO APIC unit number */
1338 int freeid; /* Free physical APIC ID */
1339 int physid; /* Current physical IO APIC ID */
1342 int bus_0 = 0; /* Stop GCC warning */
1343 int bus_pci = 0; /* Stop GCC warning */
1347 * Fix mis-numbering of the PCI bus and its INT entries if the BIOS
1348 * did it wrong. The MP spec says that when more than 1 PCI bus
1349 * exists the BIOS must begin with bus entries for the PCI bus and use
1350 * actual PCI bus numbering. This implies that when only 1 PCI bus
1351 * exists the BIOS can choose to ignore this ordering, and indeed many
1352 * MP motherboards do ignore it. This causes a problem when the PCI
1353 * sub-system makes requests of the MP sub-system based on PCI bus
1354 * numbers. So here we look for the situation and renumber the
1355 * busses and associated INTs in an effort to "make it right".
1358 /* find bus 0, PCI bus, count the number of PCI busses */
1359 for (num_pci_bus = 0, x = 0; x < mp_nbusses; ++x) {
1360 if (bus_data[x].bus_id == 0) {
1363 if (bus_data[x].bus_type == PCI) {
1369 * bus_0 == slot of bus with ID of 0
1370 * bus_pci == slot of last PCI bus encountered
1373 /* check the 1 PCI bus case for sanity */
1374 /* if it is number 0 all is well */
1375 if (num_pci_bus == 1 &&
1376 bus_data[bus_pci].bus_id != 0) {
1378 /* mis-numbered, swap with whichever bus uses slot 0 */
1380 /* swap the bus entry types */
1381 bus_data[bus_pci].bus_type = bus_data[bus_0].bus_type;
1382 bus_data[bus_0].bus_type = PCI;
1385 /* swap each relavant INTerrupt entry */
1386 id = bus_data[bus_pci].bus_id;
1387 for (x = 0; x < nintrs; ++x) {
1388 if (io_apic_ints[x].src_bus_id == id) {
1389 io_apic_ints[x].src_bus_id = 0;
1391 else if (io_apic_ints[x].src_bus_id == 0) {
1392 io_apic_ints[x].src_bus_id = id;
1399 /* Assign IO APIC IDs.
1401 * First try the existing ID. If a conflict is detected, try
1402 * the ID in the MP table. If a conflict is still detected, find
1405 * We cannot use the ID_TO_IO table before all conflicts has been
1406 * resolved and the table has been corrected.
1408 for (apic = 0; apic < mp_napics; ++apic) { /* For all IO APICs */
1410 /* First try to use the value set by the BIOS */
1411 physid = io_apic_get_id(apic);
1412 if (io_apic_id_acceptable(apic, physid)) {
1413 if (IO_TO_ID(apic) != physid)
1414 swap_apic_id(apic, IO_TO_ID(apic), physid);
1418 /* Then check if the value in the MP table is acceptable */
1419 if (io_apic_id_acceptable(apic, IO_TO_ID(apic)))
1422 /* Last resort, find a free APIC ID and use it */
1423 freeid = first_free_apic_id();
1424 if (freeid >= NAPICID)
1425 panic("No free physical APIC IDs found");
1427 if (io_apic_id_acceptable(apic, freeid)) {
1428 swap_apic_id(apic, IO_TO_ID(apic), freeid);
1431 panic("Free physical APIC ID not usable");
1433 fix_id_to_io_mapping();
1437 /* detect and fix broken Compaq MP table */
1438 if (apic_int_type(0, 0) == -1) {
1439 kprintf("APIC_IO: MP table broken: 8259->APIC entry missing!\n");
1440 io_apic_ints[nintrs].int_type = 3; /* ExtInt */
1441 io_apic_ints[nintrs].int_vector = 0xff; /* Unassigned */
1442 /* XXX fixme, set src bus id etc, but it doesn't seem to hurt */
1443 io_apic_ints[nintrs].dst_apic_id = IO_TO_ID(0);
1444 io_apic_ints[nintrs].dst_apic_int = 0; /* Pin 0 */
1446 } else if (apic_int_type(0, 0) == 0) {
1447 kprintf("APIC_IO: MP table broken: ExtINT entry corrupt!\n");
1448 for (x = 0; x < nintrs; ++x)
1449 if ((0 == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1450 (0 == io_apic_ints[x].dst_apic_int)) {
1451 io_apic_ints[x].int_type = 3;
1452 io_apic_ints[x].int_vector = 0xff;
1458 * Fix missing IRQ 15 when IRQ 14 is an ISA interrupt. IDE
1459 * controllers universally come in pairs. If IRQ 14 is specified
1460 * as an ISA interrupt, then IRQ 15 had better be too.
1462 * [ Shuttle XPC / AMD Athlon X2 ]
1463 * The MPTable is missing an entry for IRQ 15. Note that the
1464 * ACPI table has an entry for both 14 and 15.
1466 if (apic_int_type(0, 14) == 0 && apic_int_type(0, 15) == -1) {
1467 kprintf("APIC_IO: MP table broken: IRQ 15 not ISA when IRQ 14 is!\n");
1468 io14 = io_apic_find_int_entry(0, 14);
1469 io_apic_ints[nintrs] = *io14;
1470 io_apic_ints[nintrs].src_bus_irq = 15;
1471 io_apic_ints[nintrs].dst_apic_int = 15;
1479 /* Assign low level interrupt handlers */
1481 setup_apic_irq_mapping(void)
1487 for (x = 0; x < APIC_INTMAPSIZE; x++) {
1488 int_to_apicintpin[x].ioapic = -1;
1489 int_to_apicintpin[x].int_pin = 0;
1490 int_to_apicintpin[x].apic_address = NULL;
1491 int_to_apicintpin[x].redirindex = 0;
1494 /* First assign ISA/EISA interrupts */
1495 for (x = 0; x < nintrs; x++) {
1496 int_vector = io_apic_ints[x].src_bus_irq;
1497 if (int_vector < APIC_INTMAPSIZE &&
1498 io_apic_ints[x].int_vector == 0xff &&
1499 int_to_apicintpin[int_vector].ioapic == -1 &&
1500 (apic_int_is_bus_type(x, ISA) ||
1501 apic_int_is_bus_type(x, EISA)) &&
1502 io_apic_ints[x].int_type == 0) {
1503 assign_apic_irq(ID_TO_IO(io_apic_ints[x].dst_apic_id),
1504 io_apic_ints[x].dst_apic_int,
1509 /* Assign ExtInt entry if no ISA/EISA interrupt 0 entry */
1510 for (x = 0; x < nintrs; x++) {
1511 if (io_apic_ints[x].dst_apic_int == 0 &&
1512 io_apic_ints[x].dst_apic_id == IO_TO_ID(0) &&
1513 io_apic_ints[x].int_vector == 0xff &&
1514 int_to_apicintpin[0].ioapic == -1 &&
1515 io_apic_ints[x].int_type == 3) {
1516 assign_apic_irq(0, 0, 0);
1521 /* Assign PCI interrupts */
1522 for (x = 0; x < nintrs; ++x) {
1523 if (io_apic_ints[x].int_type == 0 &&
1524 io_apic_ints[x].int_vector == 0xff &&
1525 apic_int_is_bus_type(x, PCI))
1526 allocate_apic_irq(x);
1533 mp_set_cpuids(int cpu_id, int apic_id)
1535 CPU_TO_ID(cpu_id) = apic_id;
1536 ID_TO_CPU(apic_id) = cpu_id;
1540 processor_entry(proc_entry_ptr entry, int cpu)
1544 /* check for usability */
1545 if (!(entry->cpu_flags & PROCENTRY_FLAG_EN))
1548 if(entry->apic_id >= NAPICID)
1549 panic("CPU APIC ID out of range (0..%d)", NAPICID - 1);
1550 /* check for BSP flag */
1551 if (entry->cpu_flags & PROCENTRY_FLAG_BP) {
1552 mp_set_cpuids(0, entry->apic_id);
1553 return 0; /* its already been counted */
1556 /* add another AP to list, if less than max number of CPUs */
1557 else if (cpu < MAXCPU) {
1558 mp_set_cpuids(cpu, entry->apic_id);
1567 bus_entry(bus_entry_ptr entry, int bus)
1572 /* encode the name into an index */
1573 for (x = 0; x < 6; ++x) {
1574 if ((c = entry->bus_type[x]) == ' ')
1580 if ((x = lookup_bus_type(name)) == UNKNOWN_BUSTYPE)
1581 panic("unknown bus type: '%s'", name);
1583 bus_data[bus].bus_id = entry->bus_id;
1584 bus_data[bus].bus_type = x;
1592 io_apic_entry(io_apic_entry_ptr entry, int apic)
1594 if (!(entry->apic_flags & IOAPICENTRY_FLAG_EN))
1597 IO_TO_ID(apic) = entry->apic_id;
1598 if (entry->apic_id < NAPICID)
1599 ID_TO_IO(entry->apic_id) = apic;
1607 lookup_bus_type(char *name)
1611 for (x = 0; x < MAX_BUSTYPE; ++x)
1612 if (strcmp(bus_type_table[x].name, name) == 0)
1613 return bus_type_table[x].type;
1615 return UNKNOWN_BUSTYPE;
1621 int_entry(int_entry_ptr entry, int intr)
1625 io_apic_ints[intr].int_type = entry->int_type;
1626 io_apic_ints[intr].int_flags = entry->int_flags;
1627 io_apic_ints[intr].src_bus_id = entry->src_bus_id;
1628 io_apic_ints[intr].src_bus_irq = entry->src_bus_irq;
1629 if (entry->dst_apic_id == 255) {
1630 /* This signal goes to all IO APICS. Select an IO APIC
1631 with sufficient number of interrupt pins */
1632 for (apic = 0; apic < mp_napics; apic++)
1633 if (((io_apic_read(apic, IOAPIC_VER) &
1634 IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) >=
1635 entry->dst_apic_int)
1637 if (apic < mp_napics)
1638 io_apic_ints[intr].dst_apic_id = IO_TO_ID(apic);
1640 io_apic_ints[intr].dst_apic_id = entry->dst_apic_id;
1642 io_apic_ints[intr].dst_apic_id = entry->dst_apic_id;
1643 io_apic_ints[intr].dst_apic_int = entry->dst_apic_int;
1649 apic_int_is_bus_type(int intr, int bus_type)
1653 for (bus = 0; bus < mp_nbusses; ++bus)
1654 if ((bus_data[bus].bus_id == io_apic_ints[intr].src_bus_id)
1655 && ((int) bus_data[bus].bus_type == bus_type))
1662 * Given a traditional ISA INT mask, return an APIC mask.
1665 isa_apic_mask(u_int isa_mask)
1670 #if defined(SKIP_IRQ15_REDIRECT)
1671 if (isa_mask == (1 << 15)) {
1672 kprintf("skipping ISA IRQ15 redirect\n");
1675 #endif /* SKIP_IRQ15_REDIRECT */
1677 isa_irq = ffs(isa_mask); /* find its bit position */
1678 if (isa_irq == 0) /* doesn't exist */
1680 --isa_irq; /* make it zero based */
1682 apic_pin = isa_apic_irq(isa_irq); /* look for APIC connection */
1686 return (1 << apic_pin); /* convert pin# to a mask */
1690 * Determine which APIC pin an ISA/EISA INT is attached to.
1692 #define INTTYPE(I) (io_apic_ints[(I)].int_type)
1693 #define INTPIN(I) (io_apic_ints[(I)].dst_apic_int)
1694 #define INTIRQ(I) (io_apic_ints[(I)].int_vector)
1695 #define INTAPIC(I) (ID_TO_IO(io_apic_ints[(I)].dst_apic_id))
1697 #define SRCBUSIRQ(I) (io_apic_ints[(I)].src_bus_irq)
1699 isa_apic_irq(int isa_irq)
1703 for (intr = 0; intr < nintrs; ++intr) { /* check each record */
1704 if (INTTYPE(intr) == 0) { /* standard INT */
1705 if (SRCBUSIRQ(intr) == isa_irq) {
1706 if (apic_int_is_bus_type(intr, ISA) ||
1707 apic_int_is_bus_type(intr, EISA)) {
1708 if (INTIRQ(intr) == 0xff)
1709 return -1; /* unassigned */
1710 return INTIRQ(intr); /* found */
1715 return -1; /* NOT found */
1720 * Determine which APIC pin a PCI INT is attached to.
1722 #define SRCBUSID(I) (io_apic_ints[(I)].src_bus_id)
1723 #define SRCBUSDEVICE(I) ((io_apic_ints[(I)].src_bus_irq >> 2) & 0x1f)
1724 #define SRCBUSLINE(I) (io_apic_ints[(I)].src_bus_irq & 0x03)
1726 pci_apic_irq(int pciBus, int pciDevice, int pciInt)
1730 --pciInt; /* zero based */
1732 for (intr = 0; intr < nintrs; ++intr) { /* check each record */
1733 if ((INTTYPE(intr) == 0) /* standard INT */
1734 && (SRCBUSID(intr) == pciBus)
1735 && (SRCBUSDEVICE(intr) == pciDevice)
1736 && (SRCBUSLINE(intr) == pciInt)) { /* a candidate IRQ */
1737 if (apic_int_is_bus_type(intr, PCI)) {
1738 if (INTIRQ(intr) == 0xff) {
1739 kprintf("IOAPIC: pci_apic_irq() "
1741 return -1; /* unassigned */
1743 return INTIRQ(intr); /* exact match */
1748 return -1; /* NOT found */
1752 next_apic_irq(int irq)
1759 for (intr = 0; intr < nintrs; intr++) {
1760 if (INTIRQ(intr) != irq || INTTYPE(intr) != 0)
1762 bus = SRCBUSID(intr);
1763 bustype = apic_bus_type(bus);
1764 if (bustype != ISA &&
1770 if (intr >= nintrs) {
1773 for (ointr = intr + 1; ointr < nintrs; ointr++) {
1774 if (INTTYPE(ointr) != 0)
1776 if (bus != SRCBUSID(ointr))
1778 if (bustype == PCI) {
1779 if (SRCBUSDEVICE(intr) != SRCBUSDEVICE(ointr))
1781 if (SRCBUSLINE(intr) != SRCBUSLINE(ointr))
1784 if (bustype == ISA || bustype == EISA) {
1785 if (SRCBUSIRQ(intr) != SRCBUSIRQ(ointr))
1788 if (INTPIN(intr) == INTPIN(ointr))
1792 if (ointr >= nintrs) {
1795 return INTIRQ(ointr);
1810 * Reprogram the MB chipset to NOT redirect an ISA INTerrupt.
1813 * Exactly what this means is unclear at this point. It is a solution
1814 * for motherboards that redirect the MBIRQ0 pin. Generically a motherboard
1815 * could route any of the ISA INTs to upper (>15) IRQ values. But most would
1816 * NOT be redirected via MBIRQ0, thus "undirect()ing" them would NOT be an
1820 undirect_isa_irq(int rirq)
1824 kprintf("Freeing redirected ISA irq %d.\n", rirq);
1825 /** FIXME: tickle the MB redirector chip */
1829 kprintf("Freeing (NOT implemented) redirected ISA irq %d.\n", rirq);
1836 * Reprogram the MB chipset to NOT redirect a PCI INTerrupt
1839 undirect_pci_irq(int rirq)
1843 kprintf("Freeing redirected PCI irq %d.\n", rirq);
1845 /** FIXME: tickle the MB redirector chip */
1849 kprintf("Freeing (NOT implemented) redirected PCI irq %d.\n",
1857 * given a bus ID, return:
1858 * the bus type if found
1862 apic_bus_type(int id)
1866 for (x = 0; x < mp_nbusses; ++x)
1867 if (bus_data[x].bus_id == id)
1868 return bus_data[x].bus_type;
1876 * given a LOGICAL APIC# and pin#, return:
1877 * the associated src bus ID if found
1881 apic_src_bus_id(int apic, int pin)
1885 /* search each of the possible INTerrupt sources */
1886 for (x = 0; x < nintrs; ++x)
1887 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1888 (pin == io_apic_ints[x].dst_apic_int))
1889 return (io_apic_ints[x].src_bus_id);
1891 return -1; /* NOT found */
1895 * given a LOGICAL APIC# and pin#, return:
1896 * the associated src bus IRQ if found
1900 apic_src_bus_irq(int apic, int pin)
1904 for (x = 0; x < nintrs; x++)
1905 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1906 (pin == io_apic_ints[x].dst_apic_int))
1907 return (io_apic_ints[x].src_bus_irq);
1909 return -1; /* NOT found */
1914 * given a LOGICAL APIC# and pin#, return:
1915 * the associated INTerrupt type if found
1919 apic_int_type(int apic, int pin)
1923 /* search each of the possible INTerrupt sources */
1924 for (x = 0; x < nintrs; ++x) {
1925 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1926 (pin == io_apic_ints[x].dst_apic_int))
1927 return (io_apic_ints[x].int_type);
1929 return -1; /* NOT found */
1933 * Return the IRQ associated with an APIC pin
1936 apic_irq(int apic, int pin)
1941 for (x = 0; x < nintrs; ++x) {
1942 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1943 (pin == io_apic_ints[x].dst_apic_int)) {
1944 res = io_apic_ints[x].int_vector;
1947 if (apic != int_to_apicintpin[res].ioapic)
1948 panic("apic_irq: inconsistent table %d/%d", apic, int_to_apicintpin[res].ioapic);
1949 if (pin != int_to_apicintpin[res].int_pin)
1950 panic("apic_irq inconsistent table (2)");
1959 * given a LOGICAL APIC# and pin#, return:
1960 * the associated trigger mode if found
1964 apic_trigger(int apic, int pin)
1968 /* search each of the possible INTerrupt sources */
1969 for (x = 0; x < nintrs; ++x)
1970 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1971 (pin == io_apic_ints[x].dst_apic_int))
1972 return ((io_apic_ints[x].int_flags >> 2) & 0x03);
1974 return -1; /* NOT found */
1979 * given a LOGICAL APIC# and pin#, return:
1980 * the associated 'active' level if found
1984 apic_polarity(int apic, int pin)
1988 /* search each of the possible INTerrupt sources */
1989 for (x = 0; x < nintrs; ++x)
1990 if ((apic == ID_TO_IO(io_apic_ints[x].dst_apic_id)) &&
1991 (pin == io_apic_ints[x].dst_apic_int))
1992 return (io_apic_ints[x].int_flags & 0x03);
1994 return -1; /* NOT found */
2000 * set data according to MP defaults
2001 * FIXME: probably not complete yet...
2004 mptable_default(int type)
2006 int ap_cpu_id, boot_cpu_id;
2007 #if defined(APIC_IO)
2010 #endif /* APIC_IO */
2013 kprintf(" MP default config type: %d\n", type);
2016 kprintf(" bus: ISA, APIC: 82489DX\n");
2019 kprintf(" bus: EISA, APIC: 82489DX\n");
2022 kprintf(" bus: EISA, APIC: 82489DX\n");
2025 kprintf(" bus: MCA, APIC: 82489DX\n");
2028 kprintf(" bus: ISA+PCI, APIC: Integrated\n");
2031 kprintf(" bus: EISA+PCI, APIC: Integrated\n");
2034 kprintf(" bus: MCA+PCI, APIC: Integrated\n");
2037 kprintf(" future type\n");
2043 boot_cpu_id = (lapic->id & APIC_ID_MASK) >> 24;
2044 ap_cpu_id = (boot_cpu_id == 0) ? 1 : 0;
2047 CPU_TO_ID(0) = boot_cpu_id;
2048 ID_TO_CPU(boot_cpu_id) = 0;
2050 /* one and only AP */
2051 CPU_TO_ID(1) = ap_cpu_id;
2052 ID_TO_CPU(ap_cpu_id) = 1;
2054 #if defined(APIC_IO)
2055 /* one and only IO APIC */
2056 io_apic_id = (io_apic_read(0, IOAPIC_ID) & APIC_ID_MASK) >> 24;
2059 * sanity check, refer to MP spec section 3.6.6, last paragraph
2060 * necessary as some hardware isn't properly setting up the IO APIC
2062 #if defined(REALLY_ANAL_IOAPICID_VALUE)
2063 if (io_apic_id != 2) {
2065 if ((io_apic_id == 0) || (io_apic_id == 1) || (io_apic_id == 15)) {
2066 #endif /* REALLY_ANAL_IOAPICID_VALUE */
2067 io_apic_set_id(0, 2);
2070 IO_TO_ID(0) = io_apic_id;
2071 ID_TO_IO(io_apic_id) = 0;
2072 #endif /* APIC_IO */
2074 /* fill out bus entries */
2083 bus_data[0].bus_id = default_data[type - 1][1];
2084 bus_data[0].bus_type = default_data[type - 1][2];
2085 bus_data[1].bus_id = default_data[type - 1][3];
2086 bus_data[1].bus_type = default_data[type - 1][4];
2089 /* case 4: case 7: MCA NOT supported */
2090 default: /* illegal/reserved */
2091 panic("BAD default MP config: %d", type);
2095 #if defined(APIC_IO)
2096 /* general cases from MP v1.4, table 5-2 */
2097 for (pin = 0; pin < 16; ++pin) {
2098 io_apic_ints[pin].int_type = 0;
2099 io_apic_ints[pin].int_flags = 0x05; /* edge/active-hi */
2100 io_apic_ints[pin].src_bus_id = 0;
2101 io_apic_ints[pin].src_bus_irq = pin; /* IRQ2 caught below */
2102 io_apic_ints[pin].dst_apic_id = io_apic_id;
2103 io_apic_ints[pin].dst_apic_int = pin; /* 1-to-1 */
2106 /* special cases from MP v1.4, table 5-2 */
2108 io_apic_ints[2].int_type = 0xff; /* N/C */
2109 io_apic_ints[13].int_type = 0xff; /* N/C */
2110 #if !defined(APIC_MIXED_MODE)
2112 panic("sorry, can't support type 2 default yet");
2113 #endif /* APIC_MIXED_MODE */
2116 io_apic_ints[2].src_bus_irq = 0; /* ISA IRQ0 is on APIC INT 2 */
2119 io_apic_ints[0].int_type = 0xff; /* N/C */
2121 io_apic_ints[0].int_type = 3; /* vectored 8259 */
2122 #endif /* APIC_IO */
2126 * Map a physical memory address representing I/O into KVA. The I/O
2127 * block is assumed not to cross a page boundary.
2130 permanent_io_mapping(vm_paddr_t pa)
2132 KKASSERT(pa < 0x100000000LL);
2134 return pmap_mapdev_uncacheable(pa, PAGE_SIZE);
2138 * start each AP in our list
2141 start_all_aps(u_int boot_addr)
2143 vm_offset_t va = boot_address + KERNBASE;
2144 u_int64_t *pt4, *pt3, *pt2;
2150 u_char mpbiosreason;
2151 u_long mpbioswarmvec;
2152 struct mdglobaldata *gd;
2153 struct privatespace *ps;
2155 POSTCODE(START_ALL_APS_POST);
2157 /* Initialize BSP's local APIC */
2158 apic_initialize(TRUE);
2161 /* install the AP 1st level boot code */
2162 pmap_kenter(va, boot_address);
2163 cpu_invlpg((void *)va); /* JG XXX */
2164 bcopy(mptramp_start, (void *)va, bootMP_size);
2166 /* Locate the page tables, they'll be below the trampoline */
2167 pt4 = (u_int64_t *)(uintptr_t)(mptramp_pagetables + KERNBASE);
2168 pt3 = pt4 + (PAGE_SIZE) / sizeof(u_int64_t);
2169 pt2 = pt3 + (PAGE_SIZE) / sizeof(u_int64_t);
2171 /* Create the initial 1GB replicated page tables */
2172 for (i = 0; i < 512; i++) {
2173 /* Each slot of the level 4 pages points to the same level 3 page */
2174 pt4[i] = (u_int64_t)(uintptr_t)(mptramp_pagetables + PAGE_SIZE);
2175 pt4[i] |= PG_V | PG_RW | PG_U;
2177 /* Each slot of the level 3 pages points to the same level 2 page */
2178 pt3[i] = (u_int64_t)(uintptr_t)(mptramp_pagetables + (2 * PAGE_SIZE));
2179 pt3[i] |= PG_V | PG_RW | PG_U;
2181 /* The level 2 page slots are mapped with 2MB pages for 1GB. */
2182 pt2[i] = i * (2 * 1024 * 1024);
2183 pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
2186 /* save the current value of the warm-start vector */
2187 mpbioswarmvec = *((u_int32_t *) WARMBOOT_OFF);
2188 outb(CMOS_REG, BIOS_RESET);
2189 mpbiosreason = inb(CMOS_DATA);
2191 /* setup a vector to our boot code */
2192 *((volatile u_short *) WARMBOOT_OFF) = WARMBOOT_TARGET;
2193 *((volatile u_short *) WARMBOOT_SEG) = (boot_address >> 4);
2194 outb(CMOS_REG, BIOS_RESET);
2195 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
2198 * If we have a TSC we can figure out the SMI interrupt rate.
2199 * The SMI does not necessarily use a constant rate. Spend
2200 * up to 250ms trying to figure it out.
2203 if (cpu_feature & CPUID_TSC) {
2204 set_apic_timer(275000);
2205 smilast = read_apic_timer();
2206 for (x = 0; x < 20 && read_apic_timer(); ++x) {
2207 smicount = smitest();
2208 if (smibest == 0 || smilast - smicount < smibest)
2209 smibest = smilast - smicount;
2212 if (smibest > 250000)
2215 smibest = smibest * (int64_t)1000000 /
2216 get_apic_timer_frequency();
2220 kprintf("SMI Frequency (worst case): %d Hz (%d us)\n",
2221 1000000 / smibest, smibest);
2224 for (x = 1; x <= mp_naps; ++x) {
2226 /* This is a bit verbose, it will go away soon. */
2228 /* first page of AP's private space */
2229 pg = x * x86_64_btop(sizeof(struct privatespace));
2231 /* allocate new private data page(s) */
2232 gd = (struct mdglobaldata *)kmem_alloc(&kernel_map,
2233 MDGLOBALDATA_BASEALLOC_SIZE);
2235 gd = &CPU_prvspace[x].mdglobaldata; /* official location */
2236 bzero(gd, sizeof(*gd));
2237 gd->mi.gd_prvspace = ps = &CPU_prvspace[x];
2239 /* prime data page for it to use */
2240 mi_gdinit(&gd->mi, x);
2242 gd->gd_CMAP1 = &SMPpt[pg + 0];
2243 gd->gd_CMAP2 = &SMPpt[pg + 1];
2244 gd->gd_CMAP3 = &SMPpt[pg + 2];
2245 gd->gd_PMAP1 = &SMPpt[pg + 3];
2246 gd->gd_CADDR1 = ps->CPAGE1;
2247 gd->gd_CADDR2 = ps->CPAGE2;
2248 gd->gd_CADDR3 = ps->CPAGE3;
2249 gd->gd_PADDR1 = (pt_entry_t *)ps->PPAGE1;
2250 gd->mi.gd_ipiq = (void *)kmem_alloc(&kernel_map, sizeof(lwkt_ipiq) * (mp_naps + 1));
2251 bzero(gd->mi.gd_ipiq, sizeof(lwkt_ipiq) * (mp_naps + 1));
2253 /* setup a vector to our boot code */
2254 *((volatile u_short *) WARMBOOT_OFF) = WARMBOOT_TARGET;
2255 *((volatile u_short *) WARMBOOT_SEG) = (boot_addr >> 4);
2256 outb(CMOS_REG, BIOS_RESET);
2257 outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
2260 * Setup the AP boot stack
2262 bootSTK = &ps->idlestack[UPAGES*PAGE_SIZE/2];
2265 /* attempt to start the Application Processor */
2266 CHECK_INIT(99); /* setup checkpoints */
2267 if (!start_ap(gd, boot_addr, smibest)) {
2268 kprintf("AP #%d (PHY# %d) failed!\n", x, CPU_TO_ID(x));
2269 CHECK_PRINT("trace"); /* show checkpoints */
2270 /* better panic as the AP may be running loose */
2271 kprintf("panic y/n? [y] ");
2272 if (cngetc() != 'n')
2275 CHECK_PRINT("trace"); /* show checkpoints */
2277 /* record its version info */
2278 cpu_apic_versions[x] = cpu_apic_versions[0];
2281 /* set ncpus to 1 + highest logical cpu. Not all may have come up */
2284 /* ncpus2 -- ncpus rounded down to the nearest power of 2 */
2285 for (shift = 0; (1 << shift) <= ncpus; ++shift)
2288 ncpus2_shift = shift;
2289 ncpus2 = 1 << shift;
2290 ncpus2_mask = ncpus2 - 1;
2292 /* ncpus_fit -- ncpus rounded up to the nearest power of 2 */
2293 if ((1 << shift) < ncpus)
2295 ncpus_fit = 1 << shift;
2296 ncpus_fit_mask = ncpus_fit - 1;
2298 /* build our map of 'other' CPUs */
2299 mycpu->gd_other_cpus = smp_startup_mask & ~(1 << mycpu->gd_cpuid);
2300 mycpu->gd_ipiq = (void *)kmem_alloc(&kernel_map, sizeof(lwkt_ipiq) * ncpus);
2301 bzero(mycpu->gd_ipiq, sizeof(lwkt_ipiq) * ncpus);
2303 /* fill in our (BSP) APIC version */
2304 cpu_apic_versions[0] = lapic->version;
2306 /* restore the warmstart vector */
2307 *(u_long *) WARMBOOT_OFF = mpbioswarmvec;
2308 outb(CMOS_REG, BIOS_RESET);
2309 outb(CMOS_DATA, mpbiosreason);
2312 * NOTE! The idlestack for the BSP was setup by locore. Finish
2313 * up, clean out the P==V mapping we did earlier.
2317 /* number of APs actually started */
2323 * load the 1st level AP boot code into base memory.
2326 /* targets for relocation */
2327 extern void bigJump(void);
2328 extern void bootCodeSeg(void);
2329 extern void bootDataSeg(void);
2330 extern void MPentry(void);
2331 extern u_int MP_GDT;
2332 extern u_int mp_gdtbase;
2337 install_ap_tramp(u_int boot_addr)
2340 int size = *(int *) ((u_long) & bootMP_size);
2341 u_char *src = (u_char *) ((u_long) bootMP);
2342 u_char *dst = (u_char *) boot_addr + KERNBASE;
2343 u_int boot_base = (u_int) bootMP;
2348 POSTCODE(INSTALL_AP_TRAMP_POST);
2350 for (x = 0; x < size; ++x)
2354 * modify addresses in code we just moved to basemem. unfortunately we
2355 * need fairly detailed info about mpboot.s for this to work. changes
2356 * to mpboot.s might require changes here.
2359 /* boot code is located in KERNEL space */
2360 dst = (u_char *) boot_addr + KERNBASE;
2362 /* modify the lgdt arg */
2363 dst32 = (u_int32_t *) (dst + ((u_int) & mp_gdtbase - boot_base));
2364 *dst32 = boot_addr + ((u_int) & MP_GDT - boot_base);
2366 /* modify the ljmp target for MPentry() */
2367 dst32 = (u_int32_t *) (dst + ((u_int) bigJump - boot_base) + 1);
2368 *dst32 = ((u_int) MPentry - KERNBASE);
2370 /* modify the target for boot code segment */
2371 dst16 = (u_int16_t *) (dst + ((u_int) bootCodeSeg - boot_base));
2372 dst8 = (u_int8_t *) (dst16 + 1);
2373 *dst16 = (u_int) boot_addr & 0xffff;
2374 *dst8 = ((u_int) boot_addr >> 16) & 0xff;
2376 /* modify the target for boot data segment */
2377 dst16 = (u_int16_t *) (dst + ((u_int) bootDataSeg - boot_base));
2378 dst8 = (u_int8_t *) (dst16 + 1);
2379 *dst16 = (u_int) boot_addr & 0xffff;
2380 *dst8 = ((u_int) boot_addr >> 16) & 0xff;
2386 * This function starts the AP (application processor) identified
2387 * by the APIC ID 'physicalCpu'. It does quite a "song and dance"
2388 * to accomplish this. This is necessary because of the nuances
2389 * of the different hardware we might encounter. It ain't pretty,
2390 * but it seems to work.
2392 * NOTE: eventually an AP gets to ap_init(), which is called just
2393 * before the AP goes into the LWKT scheduler's idle loop.
2396 start_ap(struct mdglobaldata *gd, u_int boot_addr, int smibest)
2400 u_long icr_lo, icr_hi;
2402 POSTCODE(START_AP_POST);
2404 /* get the PHYSICAL APIC ID# */
2405 physical_cpu = CPU_TO_ID(gd->mi.gd_cpuid);
2407 /* calculate the vector */
2408 vector = (boot_addr >> 12) & 0xff;
2410 /* We don't want anything interfering */
2413 /* Make sure the target cpu sees everything */
2417 * Try to detect when a SMI has occurred, wait up to 200ms.
2419 * If a SMI occurs during an AP reset but before we issue
2420 * the STARTUP command, the AP may brick. To work around
2421 * this problem we hold off doing the AP startup until
2422 * after we have detected the SMI. Hopefully another SMI
2423 * will not occur before we finish the AP startup.
2425 * Retries don't seem to help. SMIs have a window of opportunity
2426 * and if USB->legacy keyboard emulation is enabled in the BIOS
2427 * the interrupt rate can be quite high.
2429 * NOTE: Don't worry about the L1 cache load, it might bloat
2430 * ldelta a little but ndelta will be so huge when the SMI
2431 * occurs the detection logic will still work fine.
2434 set_apic_timer(200000);
2439 * first we do an INIT/RESET IPI this INIT IPI might be run, reseting
2440 * and running the target CPU. OR this INIT IPI might be latched (P5
2441 * bug), CPU waiting for STARTUP IPI. OR this INIT IPI might be
2444 * see apic/apicreg.h for icr bit definitions.
2446 * TIME CRITICAL CODE, DO NOT DO ANY KPRINTFS IN THE HOT PATH.
2450 * Setup the address for the target AP. We can setup
2451 * icr_hi once and then just trigger operations with
2454 icr_hi = lapic->icr_hi & ~APIC_ID_MASK;
2455 icr_hi |= (physical_cpu << 24);
2456 icr_lo = lapic->icr_lo & 0xfff00000;
2457 lapic->icr_hi = icr_hi;
2460 * Do an INIT IPI: assert RESET
2462 * Use edge triggered mode to assert INIT
2464 lapic->icr_lo = icr_lo | 0x00004500;
2465 while (lapic->icr_lo & APIC_DELSTAT_MASK)
2469 * The spec calls for a 10ms delay but we may have to use a
2470 * MUCH lower delay to avoid bricking an AP due to a fast SMI
2471 * interrupt. We have other loops here too and dividing by 2
2472 * doesn't seem to be enough even after subtracting 350us,
2473 * so we divide by 4.
2475 * Our minimum delay is 150uS, maximum is 10ms. If no SMI
2476 * interrupt was detected we use the full 10ms.
2480 else if (smibest < 150 * 4 + 350)
2482 else if ((smibest - 350) / 4 < 10000)
2483 u_sleep((smibest - 350) / 4);
2488 * Do an INIT IPI: deassert RESET
2490 * Use level triggered mode to deassert. It is unclear
2491 * why we need to do this.
2493 lapic->icr_lo = icr_lo | 0x00008500;
2494 while (lapic->icr_lo & APIC_DELSTAT_MASK)
2496 u_sleep(150); /* wait 150us */
2499 * Next we do a STARTUP IPI: the previous INIT IPI might still be
2500 * latched, (P5 bug) this 1st STARTUP would then terminate
2501 * immediately, and the previously started INIT IPI would continue. OR
2502 * the previous INIT IPI has already run. and this STARTUP IPI will
2503 * run. OR the previous INIT IPI was ignored. and this STARTUP IPI
2506 lapic->icr_lo = icr_lo | 0x00000600 | vector;
2507 while (lapic->icr_lo & APIC_DELSTAT_MASK)
2509 u_sleep(200); /* wait ~200uS */
2512 * Finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
2513 * the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
2514 * this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
2515 * recognized after hardware RESET or INIT IPI.
2517 lapic->icr_lo = icr_lo | 0x00000600 | vector;
2518 while (lapic->icr_lo & APIC_DELSTAT_MASK)
2521 /* Resume normal operation */
2524 /* wait for it to start, see ap_init() */
2525 set_apic_timer(5000000);/* == 5 seconds */
2526 while (read_apic_timer()) {
2527 if (smp_startup_mask & (1 << gd->mi.gd_cpuid))
2528 return 1; /* return SUCCESS */
2531 return 0; /* return FAILURE */
2546 while (read_apic_timer()) {
2548 for (count = 0; count < 100; ++count)
2549 ntsc = rdtsc(); /* force loop to occur */
2551 ndelta = ntsc - ltsc;
2552 if (ldelta > ndelta)
2554 if (ndelta > ldelta * 2)
2557 ldelta = ntsc - ltsc;
2560 return(read_apic_timer());
2564 * Lazy flush the TLB on all other CPU's. DEPRECATED.
2566 * If for some reason we were unable to start all cpus we cannot safely
2567 * use broadcast IPIs.
2573 if (smp_startup_mask == smp_active_mask) {
2574 all_but_self_ipi(XINVLTLB_OFFSET);
2576 selected_apic_ipi(smp_active_mask, XINVLTLB_OFFSET,
2577 APIC_DELMODE_FIXED);
2583 * When called the executing CPU will send an IPI to all other CPUs
2584 * requesting that they halt execution.
2586 * Usually (but not necessarily) called with 'other_cpus' as its arg.
2588 * - Signals all CPUs in map to stop.
2589 * - Waits for each to stop.
2596 * XXX FIXME: this is not MP-safe, needs a lock to prevent multiple CPUs
2597 * from executing at same time.
2600 stop_cpus(u_int map)
2602 map &= smp_active_mask;
2604 /* send the Xcpustop IPI to all CPUs in map */
2605 selected_apic_ipi(map, XCPUSTOP_OFFSET, APIC_DELMODE_FIXED);
2607 while ((stopped_cpus & map) != map)
2615 * Called by a CPU to restart stopped CPUs.
2617 * Usually (but not necessarily) called with 'stopped_cpus' as its arg.
2619 * - Signals all CPUs in map to restart.
2620 * - Waits for each to restart.
2628 restart_cpus(u_int map)
2630 /* signal other cpus to restart */
2631 started_cpus = map & smp_active_mask;
2633 while ((stopped_cpus & map) != 0) /* wait for each to clear its bit */
2640 * This is called once the mpboot code has gotten us properly relocated
2641 * and the MMU turned on, etc. ap_init() is actually the idle thread,
2642 * and when it returns the scheduler will call the real cpu_idle() main
2643 * loop for the idlethread. Interrupts are disabled on entry and should
2644 * remain disabled at return.
2652 * Adjust smp_startup_mask to signal the BSP that we have started
2653 * up successfully. Note that we do not yet hold the BGL. The BSP
2654 * is waiting for our signal.
2656 * We can't set our bit in smp_active_mask yet because we are holding
2657 * interrupts physically disabled and remote cpus could deadlock
2658 * trying to send us an IPI.
2660 smp_startup_mask |= 1 << mycpu->gd_cpuid;
2664 * Interlock for finalization. Wait until mp_finish is non-zero,
2665 * then get the MP lock.
2667 * Note: We are in a critical section.
2669 * Note: We have to synchronize td_mpcount to our desired MP state
2670 * before calling cpu_try_mplock().
2672 * Note: we are the idle thread, we can only spin.
2674 * Note: The load fence is memory volatile and prevents the compiler
2675 * from improperly caching mp_finish, and the cpu from improperly
2678 while (mp_finish == 0)
2680 ++curthread->td_mpcount;
2681 while (cpu_try_mplock() == 0)
2684 if (cpu_feature & CPUID_TSC) {
2686 * The BSP is constantly updating tsc0_offset, figure out the
2687 * relative difference to synchronize ktrdump.
2689 tsc_offsets[mycpu->gd_cpuid] = rdtsc() - tsc0_offset;
2692 /* BSP may have changed PTD while we're waiting for the lock */
2695 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
2699 /* Build our map of 'other' CPUs. */
2700 mycpu->gd_other_cpus = smp_startup_mask & ~(1 << mycpu->gd_cpuid);
2702 kprintf("SMP: AP CPU #%d Launched!\n", mycpu->gd_cpuid);
2704 /* A quick check from sanity claus */
2705 apic_id = (apic_id_to_logical[(lapic->id & 0x0f000000) >> 24]);
2706 if (mycpu->gd_cpuid != apic_id) {
2707 kprintf("SMP: cpuid = %d\n", mycpu->gd_cpuid);
2708 kprintf("SMP: apic_id = %d\n", apic_id);
2710 kprintf("PTD[MPPTDI] = %p\n", (void *)PTD[MPPTDI]);
2712 panic("cpuid mismatch! boom!!");
2715 /* Initialize AP's local APIC for irq's */
2716 apic_initialize(FALSE);
2718 /* Set memory range attributes for this CPU to match the BSP */
2719 mem_range_AP_init();
2722 * Once we go active we must process any IPIQ messages that may
2723 * have been queued, because no actual IPI will occur until we
2724 * set our bit in the smp_active_mask. If we don't the IPI
2725 * message interlock could be left set which would also prevent
2728 * The idle loop doesn't expect the BGL to be held and while
2729 * lwkt_switch() normally cleans things up this is a special case
2730 * because we returning almost directly into the idle loop.
2732 * The idle thread is never placed on the runq, make sure
2733 * nothing we've done put it there.
2735 KKASSERT(curthread->td_mpcount == 1);
2736 smp_active_mask |= 1 << mycpu->gd_cpuid;
2739 * Enable interrupts here. idle_restore will also do it, but
2740 * doing it here lets us clean up any strays that got posted to
2741 * the CPU during the AP boot while we are still in a critical
2744 __asm __volatile("sti; pause; pause"::);
2745 mdcpu->gd_fpending = 0;
2747 initclocks_pcpu(); /* clock interrupts (via IPIs) */
2748 lwkt_process_ipiq();
2751 * Releasing the mp lock lets the BSP finish up the SMP init
2754 KKASSERT((curthread->td_flags & TDF_RUNQ) == 0);
2758 * Get SMP fully working before we start initializing devices.
2766 kprintf("Finish MP startup\n");
2767 if (cpu_feature & CPUID_TSC)
2768 tsc0_offset = rdtsc();
2771 while (smp_active_mask != smp_startup_mask) {
2773 if (cpu_feature & CPUID_TSC)
2774 tsc0_offset = rdtsc();
2776 while (try_mplock() == 0)
2779 kprintf("Active CPU Mask: %08x\n", smp_active_mask);
2782 SYSINIT(finishsmp, SI_BOOT2_FINISH_SMP, SI_ORDER_FIRST, ap_finish, NULL)
2785 cpu_send_ipiq(int dcpu)
2787 if ((1 << dcpu) & smp_active_mask)
2788 single_apic_ipi(dcpu, XIPIQ_OFFSET, APIC_DELMODE_FIXED);
2791 #if 0 /* single_apic_ipi_passive() not working yet */
2793 * Returns 0 on failure, 1 on success
2796 cpu_send_ipiq_passive(int dcpu)
2799 if ((1 << dcpu) & smp_active_mask) {
2800 r = single_apic_ipi_passive(dcpu, XIPIQ_OFFSET,
2801 APIC_DELMODE_FIXED);