/* * 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. * * $FreeBSD$ */ #include "opt_cpu.h" #include "opt_kstack_pages.h" #ifdef SMP #include #else #error #endif #include #include #include #include /* cngetc() */ #include #ifdef GPROF #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /** TEST_DEFAULT_CONFIG, TEST_TEST1 */ #include #include #include #if defined(APIC_IO) #include /* setidt() */ #include /* IPIs */ #include /* IPIs */ #endif /* APIC_IO */ #if defined(TEST_DEFAULT_CONFIG) #define MPFPS_MPFB1 TEST_DEFAULT_CONFIG #else #define MPFPS_MPFB1 mpfps->mpfb1 #endif /* TEST_DEFAULT_CONFIG */ #define WARMBOOT_TARGET 0 #define WARMBOOT_OFF (KERNBASE + 0x0467) #define WARMBOOT_SEG (KERNBASE + 0x0469) #ifdef PC98 #define BIOS_BASE (0xe8000) #define BIOS_SIZE (0x18000) #else #define BIOS_BASE (0xf0000) #define BIOS_SIZE (0x10000) #endif #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) && !defined(PC98) #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 */ /* * Values to send to the POST hardware. */ #define MP_BOOTADDRESS_POST 0x10 #define MP_PROBE_POST 0x11 #define MPTABLE_PASS1_POST 0x12 #define MP_START_POST 0x13 #define MP_ENABLE_POST 0x14 #define MPTABLE_PASS2_POST 0x15 #define START_ALL_APS_POST 0x16 #define INSTALL_AP_TRAMP_POST 0x17 #define START_AP_POST 0x18 #define MP_ANNOUNCE_POST 0x19 static int need_hyperthreading_fixup; static u_int logical_cpus; /* used to hold the AP's until we are ready to release them */ static struct mtx ap_boot_mtx; /** XXX FIXME: where does this really belong, isa.h/isa.c perhaps? */ int current_postcode; /** XXX FIXME: what system files declare these??? */ extern struct region_descriptor r_gdt, r_idt; int bsp_apic_ready = 0; /* flags useability of BSP apic */ 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 */ extern int nkpt; u_int32_t cpu_apic_versions[MAXCPU]; u_int32_t *io_apic_versions; #ifdef APIC_INTR_REORDER struct { volatile int *location; int bit; } apic_isrbit_location[32]; #endif struct apic_intmapinfo int_to_apicintpin[APIC_INTMAPSIZE]; /* * 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]; /* AP uses this during bootstrap. Do not staticize. */ char *bootSTK; static int bootAP; /* Hotwire a 0->4MB V==P mapping */ extern pt_entry_t *KPTphys; /* SMP page table page */ extern pt_entry_t *SMPpt; struct pcb stoppcbs[MAXCPU]; #ifdef APIC_IO /* Variables needed for SMP tlb shootdown. */ vm_offset_t smp_tlb_addr1; vm_offset_t smp_tlb_addr2; volatile int smp_tlb_wait; static struct mtx smp_tlb_mtx; #endif /* * Local data and functions. */ /* Set to 1 once we're ready to let the APs out of the pen. */ static volatile int aps_ready = 0; 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 void mptable_hyperthread_fixup(u_int id_mask); static void mptable_pass1(void); static int mptable_pass2(void); static void default_mp_table(int type); static void fix_mp_table(void); static void setup_apic_irq_mapping(void); static void init_locks(void); 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); void ap_init(void); static int apic_int_is_bus_type(int intr, int bus_type); static void release_aps(void *dummy); /* * initialize all the SMP locks */ /* lock region used by kernel profiling */ int mcount_lock; #ifdef USE_COMLOCK /* locks com (tty) data/hardware accesses: a FASTINTR() */ struct mtx com_mtx; #endif /* USE_COMLOCK */ static void init_locks(void) { #ifdef USE_COMLOCK mtx_init(&com_mtx, "com", NULL, MTX_SPIN); #endif /* USE_COMLOCK */ #ifdef APIC_IO mtx_init(&smp_tlb_mtx, "tlb", NULL, MTX_SPIN); #endif } /* * Calculate usable address in base memory for AP trampoline code. */ u_int mp_bootaddress(u_int basemem) { POSTCODE(MP_BOOTADDRESS_POST); 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; } /* * Look for an Intel MP spec table (ie, SMP capable hardware). */ void i386_mp_probe(void) { int x; u_long segment; u_int32_t target; POSTCODE(MP_PROBE_POST); /* see if EBDA exists */ if ((segment = (u_long) * (u_short *) (KERNBASE + 0x40e)) != 0) { /* search first 1K of EBDA */ target = (u_int32_t) (segment << 4); if ((x = search_for_sig(target, 1024 / 4)) >= 0) goto found; } else { /* last 1K of base memory, effective 'top of base' passed in */ target = (u_int32_t) (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; found: /* calculate needed resources */ mpfps = (mpfps_t)x; mptable_pass1(); /* flag fact that we are running multiple processors */ mp_capable = 1; } int cpu_mp_probe(void) { /* * Record BSP in CPU map * This is done here so that MBUF init code works correctly. */ all_cpus = 1; return (mp_capable); } /* * Initialize the SMP hardware and the APIC and start up the AP's. */ void cpu_mp_start(void) { POSTCODE(MP_START_POST); /* look for MP capable motherboard */ if (mp_capable) mp_enable(boot_address); else panic("MP hardware not found!"); cpu_setregs(); } /* * Print various information about the SMP system hardware and setup. */ void cpu_mp_announce(void) { int x; POSTCODE(MP_ANNOUNCE_POST); printf(" cpu0 (BSP): apic id: %2d", 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: %2d", 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: %2d", 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; int x, myid = bootAP; u_int cr0; gdt_segs[GPRIV_SEL].ssd_base = (int) &SMP_prvspace[myid]; gdt_segs[GPROC0_SEL].ssd_base = (int) &SMP_prvspace[myid].pcpu.pc_common_tss; SMP_prvspace[myid].pcpu.pc_prvspace = &SMP_prvspace[myid].pcpu; for (x = 0; x < NGDT; x++) { ssdtosd(&gdt_segs[x], &gdt[myid * NGDT + x].sd); } r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1; r_gdt.rd_base = (int) &gdt[myid * NGDT]; lgdt(&r_gdt); /* does magic intra-segment return */ lidt(&r_idt); lldt(_default_ldt); PCPU_SET(currentldt, _default_ldt); gsel_tss = GSEL(GPROC0_SEL, SEL_KPL); gdt[myid * NGDT + GPROC0_SEL].sd.sd_type = SDT_SYS386TSS; PCPU_SET(common_tss.tss_esp0, 0); /* not used until after switch */ PCPU_SET(common_tss.tss_ss0, GSEL(GDATA_SEL, SEL_KPL)); PCPU_SET(common_tss.tss_ioopt, (sizeof (struct i386tss)) << 16); PCPU_SET(tss_gdt, &gdt[myid * NGDT + GPROC0_SEL].sd); PCPU_SET(common_tssd, *PCPU_GET(tss_gdt)); ltr(gsel_tss); /* * Set to a known state: * Set by mpboot.s: CR0_PG, CR0_PE * Set by cpu_setregs: CR0_NE, CR0_MP, CR0_TS, CR0_WP, CR0_AM */ cr0 = rcr0(); cr0 &= ~(CR0_CD | CR0_NW | CR0_EM); load_cr0(cr0); pmap_set_opt(); } #if defined(APIC_IO) /* * Final configuration of the BSP's local APIC: * - disable 'pic mode'. * - disable 'virtual wire mode'. * - enable NMI. */ void bsp_apic_configure(void) { u_char byte; u_int32_t temp; /* leave 'pic mode' if necessary */ 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; /* set the mask */ lapic.lvt_lint0 = temp; /* setup lint1 to handle NMI */ temp = lapic.lvt_lint1; temp &= ~APIC_LVT_M; /* clear the mask */ lapic.lvt_lint1 = temp; if (bootverbose) apic_dump("bsp_apic_configure()"); } #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 */ POSTCODE(MP_ENABLE_POST); /* turn on 4MB of V == P addressing so we can get to MP table */ *(int *)PTD = PG_V | PG_RW | ((uintptr_t)(void *)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); /* post scan cleanup */ fix_mp_table(); setup_apic_irq_mapping(); #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; io_apic_set_id(apic, IO_TO_ID(apic)); } /* 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 a 'Spurious INTerrupt' vector */ setidt(XSPURIOUSINT_OFFSET, Xspuriousint, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); /* install an inter-CPU IPI for TLB invalidation */ setidt(XINVLTLB_OFFSET, Xinvltlb, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); setidt(XINVLPG_OFFSET, Xinvlpg, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); setidt(XINVLRNG_OFFSET, Xinvlrng, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); /* install an inter-CPU IPI for forwarding hardclock() */ setidt(XHARDCLOCK_OFFSET, Xhardclock, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); /* install an inter-CPU IPI for forwarding statclock() */ setidt(XSTATCLOCK_OFFSET, Xstatclock, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); /* install an inter-CPU IPI for all-CPU rendezvous */ setidt(XRENDEZVOUS_OFFSET, Xrendezvous, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); /* install an inter-CPU IPI for forcing an additional software trap */ setidt(XCPUAST_OFFSET, Xcpuast, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); /* install an inter-CPU IPI for CPU stop/restart */ setidt(XCPUSTOP_OFFSET, Xcpustop, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); #if defined(TEST_TEST1) /* install a "fake hardware INTerrupt" vector */ setidt(XTEST1_OFFSET, Xtest1, SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); #endif /** TEST_TEST1 */ #endif /* APIC_IO */ /* initialize all SMP locks */ init_locks(); /* start each Application Processor */ start_all_aps(boot_addr); } /* * 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; u_char int_vector; } 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"}, {MCA, "MCA"}, {UNKNOWN_BUSTYPE, "---"}, {ISA, "ISA"}, {MCA, "MCA"}, {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}, {1, 0, MCA, 255, 255}, {2, 0, ISA, 1, PCI}, {2, 0, EISA, 1, PCI}, {2, 0, MCA, 1, PCI} }; /* the bus data */ static bus_datum *bus_data; /* the IO INT data, one entry per possible APIC INTerrupt */ static io_int *io_apic_ints; static int nintrs; static int processor_entry(proc_entry_ptr entry, int cpu); static int bus_entry(bus_entry_ptr entry, int bus); static int io_apic_entry(io_apic_entry_ptr entry, int apic); static int int_entry(int_entry_ptr entry, int intr); static int lookup_bus_type(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 void mptable_pass1(void) { int x; mpcth_t cth; int totalSize; void* position; int count; int type; u_int id_mask; POSTCODE(MPTABLE_PASS1_POST); /* 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; id_mask = 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_maxid = 1; 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; mp_maxid++; id_mask |= 1 << ((proc_entry_ptr)position)->apic_id; } 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 > MAXCPU) { printf("Warning: only using %d of %d available CPUs!\n", MAXCPU, mp_naps); mp_naps = MAXCPU; } /* See if we need to fixup HT logical CPUs. */ mptable_hyperthread_fixup(id_mask); /* * Count the BSP. * This is also used as a counter while starting the APs. */ mp_ncpus = 1; --mp_naps; /* subtract the BSP */ } /* * 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) { struct PROCENTRY proc; int x; mpcth_t cth; int totalSize; void* position; int count; int type; int apic, bus, cpu, intr; int i, j; int pgeflag; POSTCODE(MPTABLE_PASS2_POST); /* Initialize fake proc entry for use with HT fixup. */ bzero(&proc, sizeof(proc)); proc.type = 0; proc.cpu_flags = PROCENTRY_FLAG_EN; pgeflag = 0; /* XXX - Not used under SMP yet. */ MALLOC(io_apic_versions, u_int32_t *, sizeof(u_int32_t) * mp_napics, M_DEVBUF, 0); MALLOC(ioapic, volatile ioapic_t **, sizeof(ioapic_t *) * mp_napics, M_DEVBUF, 0); MALLOC(io_apic_ints, io_int *, sizeof(io_int) * (nintrs + 1), M_DEVBUF, 0); MALLOC(bus_data, bus_datum *, sizeof(bus_datum) * mp_nbusses, M_DEVBUF, 0); bzero(ioapic, sizeof(ioapic_t *) * mp_napics); for (i = 0; i < mp_napics; i++) { for (j = 0; j < mp_napics; j++) { /* same page frame as a previous IO apic? */ if (((vm_offset_t)SMPpt[NPTEPG-2-j] & PG_FRAME) == (io_apic_address[i] & PG_FRAME)) { ioapic[i] = (ioapic_t *)((u_int)SMP_prvspace + (NPTEPG-2-j) * PAGE_SIZE + (io_apic_address[i] & PAGE_MASK)); break; } /* use this slot if available */ if (((vm_offset_t)SMPpt[NPTEPG-2-j] & PG_FRAME) == 0) { SMPpt[NPTEPG-2-j] = (pt_entry_t)(PG_V | PG_RW | pgeflag | (io_apic_address[i] & PG_FRAME)); ioapic[i] = (ioapic_t *)((u_int)SMP_prvspace + (NPTEPG-2-j) * PAGE_SIZE + (io_apic_address[i] & PAGE_MASK)); break; } } } /* 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 < mp_nbusses; ++x) bus_data[x].bus_id = 0xff; /* clear IO APIC INT table */ for (x = 0; x < (nintrs + 1); ++x) { io_apic_ints[x].int_type = 0xff; io_apic_ints[x].int_vector = 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 (MPFPS_MPFB1 != 0) return MPFPS_MPFB1; /* return default configuration type */ 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; if (need_hyperthreading_fixup) { /* * Create fake mptable processor entries * and feed them to processor_entry() to * enumerate the logical CPUs. */ proc.apic_id = ((proc_entry_ptr)position)->apic_id; for (i = 1; i < logical_cpus; i++) { proc.apic_id++; (void)processor_entry(&proc, 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!"); /* report fact that its NOT a default configuration */ return 0; } /* * Check if we should perform a hyperthreading "fix-up" to * enumerate any logical CPU's that aren't already listed * in the table. * * XXX: We assume that all of the physical CPUs in the * system have the same number of logical CPUs. * * XXX: We assume that APIC ID's are allocated such that * the APIC ID's for a physical processor are aligned * with the number of logical CPU's in the processor. */ static void mptable_hyperthread_fixup(u_int id_mask) { u_int i, id; /* Nothing to do if there is no HTT support. */ if ((cpu_feature & CPUID_HTT) == 0) return; logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16; if (logical_cpus <= 1) return; /* * For each APIC ID of a CPU that is set in the mask, * scan the other candidate APIC ID's for this * physical processor. If any of those ID's are * already in the table, then kill the fixup. */ for (id = 0; id <= MAXCPU; id++) { if ((id_mask & 1 << id) == 0) continue; /* First, make sure we are on a logical_cpus boundary. */ if (id % logical_cpus != 0) return; for (i = id + 1; i < id + logical_cpus; i++) if ((id_mask & 1 << i) != 0) return; } /* * Ok, the ID's checked out, so enable the fixup. We have to fixup * mp_naps and mp_maxid right now. */ need_hyperthreading_fixup = 1; mp_maxid *= logical_cpus; mp_naps *= logical_cpus; } void assign_apic_irq(int apic, int intpin, int irq) { int x; if (int_to_apicintpin[irq].ioapic != -1) panic("assign_apic_irq: inconsistent table"); int_to_apicintpin[irq].ioapic = apic; int_to_apicintpin[irq].int_pin = intpin; int_to_apicintpin[irq].apic_address = ioapic[apic]; int_to_apicintpin[irq].redirindex = IOAPIC_REDTBL + 2 * intpin; for (x = 0; x < nintrs; x++) { if ((io_apic_ints[x].int_type == 0 || io_apic_ints[x].int_type == 3) && io_apic_ints[x].int_vector == 0xff && io_apic_ints[x].dst_apic_id == IO_TO_ID(apic) && io_apic_ints[x].dst_apic_int == intpin) io_apic_ints[x].int_vector = irq; } } void revoke_apic_irq(int irq) { int x; int oldapic; int oldintpin; if (int_to_apicintpin[irq].ioapic == -1) panic("revoke_apic_irq: inconsistent table"); oldapic = int_to_apicintpin[irq].ioapic; oldintpin = int_to_apicintpin[irq].int_pin; int_to_apicintpin[irq].ioapic = -1; int_to_apicintpin[irq].int_pin = 0; int_to_apicintpin[irq].apic_address = NULL; int_to_apicintpin[irq].redirindex = 0; for (x = 0; x < nintrs; x++) { if ((io_apic_ints[x].int_type == 0 || io_apic_ints[x].int_type == 3) && io_apic_ints[x].int_vector != 0xff && io_apic_ints[x].dst_apic_id == IO_TO_ID(oldapic) && io_apic_ints[x].dst_apic_int == oldintpin) io_apic_ints[x].int_vector = 0xff; } } static void allocate_apic_irq(int intr) { int apic; int intpin; int irq; if (io_apic_ints[intr].int_vector != 0xff) return; /* Interrupt handler already assigned */ if (io_apic_ints[intr].int_type != 0 && (io_apic_ints[intr].int_type != 3 || (io_apic_ints[intr].dst_apic_id == IO_TO_ID(0) && io_apic_ints[intr].dst_apic_int == 0))) return; /* Not INT or ExtInt on != (0, 0) */ irq = 0; while (irq < APIC_INTMAPSIZE && int_to_apicintpin[irq].ioapic != -1) irq++; if (irq >= APIC_INTMAPSIZE) return; /* No free interrupt handlers */ apic = ID_TO_IO(io_apic_ints[intr].dst_apic_id); intpin = io_apic_ints[intr].dst_apic_int; assign_apic_irq(apic, intpin, irq); io_apic_setup_intpin(apic, intpin); } static void swap_apic_id(int apic, int oldid, int newid) { int x; int oapic; if (oldid == newid) return; /* Nothing to do */ printf("Changing APIC ID for IO APIC #%d from %d to %d in MP table\n", apic, oldid, newid); /* Swap physical APIC IDs in interrupt entries */ for (x = 0; x < nintrs; x++) { if (io_apic_ints[x].dst_apic_id == oldid) io_apic_ints[x].dst_apic_id = newid; else if (io_apic_ints[x].dst_apic_id == newid) io_apic_ints[x].dst_apic_id = oldid; } /* Swap physical APIC IDs in IO_TO_ID mappings */ for (oapic = 0; oapic < mp_napics; oapic++) if (IO_TO_ID(oapic) == newid) break; if (oapic < mp_napics) { printf("Changing APIC ID for IO APIC #%d from " "%d to %d in MP table\n", oapic, newid, oldid); IO_TO_ID(oapic) = oldid; } IO_TO_ID(apic) = newid; } static void fix_id_to_io_mapping(void) { int x; for (x = 0; x < NAPICID; x++) ID_TO_IO(x) = -1; for (x = 0; x <= mp_naps; x++) if (CPU_TO_ID(x) < NAPICID) ID_TO_IO(CPU_TO_ID(x)) = x; for (x = 0; x < mp_napics; x++) if (IO_TO_ID(x) < NAPICID) ID_TO_IO(IO_TO_ID(x)) = x; } static int first_free_apic_id(void) { int freeid, x; for (freeid = 0; freeid < NAPICID; freeid++) { for (x = 0; x <= mp_naps; x++) if (CPU_TO_ID(x) == freeid) break; if (x <= mp_naps) continue; for (x = 0; x < mp_napics; x++) if (IO_TO_ID(x) == freeid) break; if (x < mp_napics) continue; return freeid; } return freeid; } static int io_apic_id_acceptable(int apic, int id) { int cpu; /* Logical CPU number */ int oapic; /* Logical IO APIC number for other IO APIC */ if (id >= NAPICID) return 0; /* Out of range */ for (cpu = 0; cpu <= mp_naps; cpu++) if (CPU_TO_ID(cpu) == id) return 0; /* Conflict with CPU */ for (oapic = 0; oapic < mp_napics && oapic < apic; oapic++) if (IO_TO_ID(oapic) == id) return 0; /* Conflict with other APIC */ return 1; /* ID is acceptable for IO APIC */ } /* * parse an Intel MP specification table */ static void fix_mp_table(void) { int x; int id; int bus_0 = 0; /* Stop GCC warning */ int bus_pci = 0; /* Stop GCC warning */ int num_pci_bus; int apic; /* IO APIC unit number */ int freeid; /* Free physical APIC ID */ int physid; /* Current physical IO APIC ID */ /* * 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 it is number 0 all is well */ if (num_pci_bus == 1 && bus_data[bus_pci].bus_id != 0) { /* 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; } } } /* Assign IO APIC IDs. * * First try the existing ID. If a conflict is detected, try * the ID in the MP table. If a conflict is still detected, find * a free id. * * We cannot use the ID_TO_IO table before all conflicts has been * resolved and the table has been corrected. */ for (apic = 0; apic < mp_napics; ++apic) { /* For all IO APICs */ /* First try to use the value set by the BIOS */ physid = io_apic_get_id(apic); if (io_apic_id_acceptable(apic, physid)) { if (IO_TO_ID(apic) != physid) swap_apic_id(apic, IO_TO_ID(apic), physid); continue; } /* Then check if the value in the MP table is acceptable */ if (io_apic_id_acceptable(apic, IO_TO_ID(apic))) continue; /* Last resort, find a free APIC ID and use it */ freeid = first_free_apic_id(); if (freeid >= NAPICID) panic("No free physical APIC IDs found"); if (io_apic_id_acceptable(apic, freeid)) { swap_apic_id(apic, IO_TO_ID(apic), freeid); continue; } panic("Free physical APIC ID not usable"); } fix_id_to_io_mapping(); /* detect and fix broken Compaq MP table */ if (apic_int_type(0, 0) == -1) { printf("APIC_IO: MP table broken: 8259->APIC entry missing!\n"); io_apic_ints[nintrs].int_type = 3; /* ExtInt */ io_apic_ints[nintrs].int_vector = 0xff; /* Unassigned */ /* XXX fixme, set src bus id etc, but it doesn't seem to hurt */ io_apic_ints[nintrs].dst_apic_id = IO_TO_ID(0); io_apic_ints[nintrs].dst_apic_int = 0; /* Pin 0 */ nintrs++; } } /* Assign low level interrupt handlers */ static void setup_apic_irq_mapping(void) { int x; int int_vector; /* Clear array */ for (x = 0; x < APIC_INTMAPSIZE; x++) { int_to_apicintpin[x].ioapic = -1; int_to_apicintpin[x].int_pin = 0; int_to_apicintpin[x].apic_address = NULL; int_to_apicintpin[x].redirindex = 0; } /* First assign ISA/EISA interrupts */ for (x = 0; x < nintrs; x++) { int_vector = io_apic_ints[x].src_bus_irq; if (int_vector < APIC_INTMAPSIZE && io_apic_ints[x].int_vector == 0xff && int_to_apicintpin[int_vector].ioapic == -1 && (apic_int_is_bus_type(x, ISA) || apic_int_is_bus_type(x, EISA)) && io_apic_ints[x].int_type == 0) { assign_apic_irq(ID_TO_IO(io_apic_ints[x].dst_apic_id), io_apic_ints[x].dst_apic_int, int_vector); } } /* Assign ExtInt entry if no ISA/EISA interrupt 0 entry */ for (x = 0; x < nintrs; x++) { if (io_apic_ints[x].dst_apic_int == 0 && io_apic_ints[x].dst_apic_id == IO_TO_ID(0) && io_apic_ints[x].int_vector == 0xff && int_to_apicintpin[0].ioapic == -1 && io_apic_ints[x].int_type == 3) { assign_apic_irq(0, 0, 0); break; } } /* PCI interrupt assignment is deferred */ } static int processor_entry(proc_entry_ptr entry, int cpu) { /* check for usability */ if (!(entry->cpu_flags & PROCENTRY_FLAG_EN)) return 0; if(entry->apic_id >= NAPICID) panic("CPU APIC ID out of range (0..%d)", NAPICID - 1); /* 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 if (cpu < MAXCPU) { CPU_TO_ID(cpu) = entry->apic_id; ID_TO_CPU(entry->apic_id) = cpu; return 1; } return 0; } 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; if (entry->apic_id < NAPICID) 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) { int apic; 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; if (entry->dst_apic_id == 255) { /* This signal goes to all IO APICS. Select an IO APIC with sufficient number of interrupt pins */ for (apic = 0; apic < mp_napics; apic++) if (((io_apic_read(apic, IOAPIC_VER) & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) >= entry->dst_apic_int) break; if (apic < mp_napics) io_apic_ints[intr].dst_apic_id = IO_TO_ID(apic); else io_apic_ints[intr].dst_apic_id = entry->dst_apic_id; } else 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; #if defined(SKIP_IRQ15_REDIRECT) if (isa_mask == (1 << 15)) { printf("skipping ISA IRQ15 redirect\n"); return isa_mask; } #endif /* SKIP_IRQ15_REDIRECT */ 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_irq(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 INTIRQ(I) (io_apic_ints[(I)].int_vector) #define INTAPIC(I) (ID_TO_IO(io_apic_ints[(I)].dst_apic_id)) #define SRCBUSIRQ(I) (io_apic_ints[(I)].src_bus_irq) int isa_apic_irq(int isa_irq) { int intr; 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)) { if (INTIRQ(intr) == 0xff) return -1; /* unassigned */ return INTIRQ(intr); /* found */ } } } } return -1; /* NOT found */ } /* * 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_irq(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)) { if (INTIRQ(intr) == 0xff) allocate_apic_irq(intr); if (INTIRQ(intr) == 0xff) return -1; /* unassigned */ return INTIRQ(intr); /* exact match */ } return -1; /* NOT found */ } int next_apic_irq(int irq) { int intr, ointr; int bus, bustype; bus = 0; bustype = 0; for (intr = 0; intr < nintrs; intr++) { if (INTIRQ(intr) != irq || INTTYPE(intr) != 0) continue; bus = SRCBUSID(intr); bustype = apic_bus_type(bus); if (bustype != ISA && bustype != EISA && bustype != PCI) continue; break; } if (intr >= nintrs) { return -1; } for (ointr = intr + 1; ointr < nintrs; ointr++) { if (INTTYPE(ointr) != 0) continue; if (bus != SRCBUSID(ointr)) continue; if (bustype == PCI) { if (SRCBUSDEVICE(intr) != SRCBUSDEVICE(ointr)) continue; if (SRCBUSLINE(intr) != SRCBUSLINE(ointr)) continue; } if (bustype == ISA || bustype == EISA) { if (SRCBUSIRQ(intr) != SRCBUSIRQ(ointr)) continue; } if (INTPIN(intr) == INTPIN(ointr)) continue; break; } if (ointr >= nintrs) { return -1; } return INTIRQ(ointr); } #undef SRCBUSLINE #undef SRCBUSDEVICE #undef SRCBUSID #undef SRCBUSIRQ #undef INTPIN #undef INTIRQ #undef INTAPIC #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) if (bootverbose) printf("Freeing redirected ISA irq %d.\n", rirq); /** FIXME: tickle the MB redirector chip */ return -1; #else if (bootverbose) 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 -1; #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 */ } int apic_irq(int apic, int pin) { int x; int res; 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)) { res = io_apic_ints[x].int_vector; if (res == 0xff) return -1; if (apic != int_to_apicintpin[res].ioapic) panic("apic_irq: inconsistent table"); if (pin != int_to_apicintpin[res].int_pin) panic("apic_irq inconsistent table (2)"); return res; } return -1; } /* * 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) 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 */ io_apic_set_id(0, 2); 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 4: case 5: case 6: case 7: 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/active-hi */ io_apic_ints[pin].src_bus_id = 0; io_apic_ints[pin].src_bus_irq = pin; /* IRQ2 caught below */ io_apic_ints[pin].dst_apic_id = io_apic_id; io_apic_ints[pin].dst_apic_int = pin; /* 1-to-1 */ } /* 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, pg; u_char mpbiosreason; u_long mpbioswarmvec; struct pcpu *pc; char *stack; uintptr_t kptbase; POSTCODE(START_ALL_APS_POST); mtx_init(&ap_boot_mtx, "ap boot", NULL, MTX_SPIN); /* initialize BSP's local APIC */ apic_initialize(); bsp_apic_ready = 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); #ifndef PC98 outb(CMOS_REG, BIOS_RESET); mpbiosreason = inb(CMOS_DATA); #endif /* set up temporary P==V mapping for AP boot */ /* XXX this is a hack, we should boot the AP on its own stack/PTD */ kptbase = (uintptr_t)(void *)KPTphys; for (x = 0; x < NKPT; x++) PTD[x] = (pd_entry_t)(PG_V | PG_RW | ((kptbase + x * PAGE_SIZE) & PG_FRAME)); invltlb(); /* start each AP */ for (x = 1; x <= mp_naps; ++x) { /* This is a bit verbose, it will go away soon. */ /* first page of AP's private space */ pg = x * i386_btop(sizeof(struct privatespace)); /* allocate a new private data page */ pc = (struct pcpu *)kmem_alloc(kernel_map, PAGE_SIZE); /* wire it into the private page table page */ SMPpt[pg] = (pt_entry_t)(PG_V | PG_RW | vtophys(pc)); /* allocate and set up an idle stack data page */ stack = (char *)kmem_alloc(kernel_map, KSTACK_PAGES * PAGE_SIZE); /* XXXKSE */ for (i = 0; i < KSTACK_PAGES; i++) SMPpt[pg + 1 + i] = (pt_entry_t) (PG_V | PG_RW | vtophys(PAGE_SIZE * i + stack)); /* prime data page for it to use */ pcpu_init(pc, x, sizeof(struct pcpu)); /* setup a vector to our boot code */ *((volatile u_short *) WARMBOOT_OFF) = WARMBOOT_TARGET; *((volatile u_short *) WARMBOOT_SEG) = (boot_addr >> 4); #ifndef PC98 outb(CMOS_REG, BIOS_RESET); outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */ #endif bootSTK = &SMP_prvspace[x].idlekstack[KSTACK_PAGES * PAGE_SIZE]; bootAP = x; /* 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]; all_cpus |= (1 << x); /* record AP in CPU map */ } /* build our map of 'other' CPUs */ PCPU_SET(other_cpus, all_cpus & ~PCPU_GET(cpumask)); /* fill in our (BSP) APIC version */ cpu_apic_versions[0] = lapic.version; /* restore the warmstart vector */ *(u_long *) WARMBOOT_OFF = mpbioswarmvec; #ifndef PC98 outb(CMOS_REG, BIOS_RESET); outb(CMOS_DATA, mpbiosreason); #endif /* * Set up the idle context for the BSP. Similar to above except * that some was done by locore, some by pmap.c and some is implicit * because the BSP is cpu#0 and the page is initially zero, and also * because we can refer to variables by name on the BSP.. */ /* Allocate and setup BSP idle stack */ stack = (char *)kmem_alloc(kernel_map, KSTACK_PAGES * PAGE_SIZE); for (i = 0; i < KSTACK_PAGES; i++) SMPpt[1 + i] = (pt_entry_t) (PG_V | PG_RW | vtophys(PAGE_SIZE * i + stack)); for (x = 0; x < NKPT; x++) PTD[x] = 0; pmap_set_opt(); /* 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; POSTCODE(INSTALL_AP_TRAMP_POST); 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; POSTCODE(START_AP_POST); /* 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 */ } #if defined(APIC_IO) #ifdef COUNT_XINVLTLB_HITS u_int xhits_gbl[MAXCPU]; u_int xhits_pg[MAXCPU]; u_int xhits_rng[MAXCPU]; SYSCTL_NODE(_debug, OID_AUTO, xhits, CTLFLAG_RW, 0, ""); SYSCTL_OPAQUE(_debug_xhits, OID_AUTO, global, CTLFLAG_RW, &xhits_gbl, sizeof(xhits_gbl), "IU", ""); SYSCTL_OPAQUE(_debug_xhits, OID_AUTO, page, CTLFLAG_RW, &xhits_pg, sizeof(xhits_pg), "IU", ""); SYSCTL_OPAQUE(_debug_xhits, OID_AUTO, range, CTLFLAG_RW, &xhits_rng, sizeof(xhits_rng), "IU", ""); u_int ipi_global; u_int ipi_page; u_int ipi_range; u_int ipi_range_size; SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_global, CTLFLAG_RW, &ipi_global, 0, ""); SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_page, CTLFLAG_RW, &ipi_page, 0, ""); SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_range, CTLFLAG_RW, &ipi_range, 0, ""); SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_range_size, CTLFLAG_RW, &ipi_range_size, 0, ""); u_int ipi_masked_global; u_int ipi_masked_page; u_int ipi_masked_range; u_int ipi_masked_range_size; SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_masked_global, CTLFLAG_RW, &ipi_masked_global, 0, ""); SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_masked_page, CTLFLAG_RW, &ipi_masked_page, 0, ""); SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_masked_range, CTLFLAG_RW, &ipi_masked_range, 0, ""); SYSCTL_INT(_debug_xhits, OID_AUTO, ipi_masked_range_size, CTLFLAG_RW, &ipi_masked_range_size, 0, ""); #endif /* * Flush the TLB on all other CPU's */ static void smp_tlb_shootdown(u_int vector, vm_offset_t addr1, vm_offset_t addr2) { u_int ncpu; register_t eflags; ncpu = mp_ncpus - 1; /* does not shootdown self */ if (ncpu < 1) return; /* no other cpus */ eflags = read_eflags(); if ((eflags & PSL_I) == 0) panic("absolutely cannot call smp_ipi_shootdown with interrupts already disabled"); mtx_lock_spin(&smp_tlb_mtx); smp_tlb_addr1 = addr1; smp_tlb_addr2 = addr2; atomic_store_rel_int(&smp_tlb_wait, 0); ipi_all_but_self(vector); while (smp_tlb_wait < ncpu) ia32_pause(); mtx_unlock_spin(&smp_tlb_mtx); } /* * This is about as magic as it gets. fortune(1) has got similar code * for reversing bits in a word. Who thinks up this stuff?? * * Yes, it does appear to be consistently faster than: * while (i = ffs(m)) { * m >>= i; * bits++; * } * and * while (lsb = (m & -m)) { // This is magic too * m &= ~lsb; // or: m ^= lsb * bits++; * } * Both of these latter forms do some very strange things on gcc-3.1 with * -mcpu=pentiumpro and/or -march=pentiumpro and/or -O or -O2. * There is probably an SSE or MMX popcnt instruction. * * I wonder if this should be in libkern? * * XXX Stop the presses! Another one: * static __inline u_int32_t * popcnt1(u_int32_t v) * { * v -= ((v >> 1) & 0x55555555); * v = (v & 0x33333333) + ((v >> 2) & 0x33333333); * v = (v + (v >> 4)) & 0x0F0F0F0F; * return (v * 0x01010101) >> 24; * } * The downside is that it has a multiply. With a pentium3 with * -mcpu=pentiumpro and -march=pentiumpro then gcc-3.1 will use * an imull, and in that case it is faster. In most other cases * it appears slightly slower. */ static __inline u_int32_t popcnt(u_int32_t m) { m = (m & 0x55555555) + ((m & 0xaaaaaaaa) >> 1); m = (m & 0x33333333) + ((m & 0xcccccccc) >> 2); m = (m & 0x0f0f0f0f) + ((m & 0xf0f0f0f0) >> 4); m = (m & 0x00ff00ff) + ((m & 0xff00ff00) >> 8); m = (m & 0x0000ffff) + ((m & 0xffff0000) >> 16); return m; } static void smp_targeted_tlb_shootdown(u_int mask, u_int vector, vm_offset_t addr1, vm_offset_t addr2) { int ncpu, othercpus; register_t eflags; othercpus = mp_ncpus - 1; if (mask == (u_int)-1) { ncpu = othercpus; if (ncpu < 1) return; } else { /* XXX there should be a pcpu self mask */ mask &= ~(1 << PCPU_GET(cpuid)); if (mask == 0) return; ncpu = popcnt(mask); if (ncpu > othercpus) { /* XXX this should be a panic offence */ printf("SMP: tlb shootdown to %d other cpus (only have %d)\n", ncpu, othercpus); ncpu = othercpus; } /* XXX should be a panic, implied by mask == 0 above */ if (ncpu < 1) return; } eflags = read_eflags(); if ((eflags & PSL_I) == 0) panic("absolutely cannot call smp_targeted_ipi_shootdown with interrupts already disabled"); mtx_lock_spin(&smp_tlb_mtx); smp_tlb_addr1 = addr1; smp_tlb_addr2 = addr2; atomic_store_rel_int(&smp_tlb_wait, 0); if (mask == (u_int)-1) ipi_all_but_self(vector); else ipi_selected(mask, vector); while (smp_tlb_wait < ncpu) ia32_pause(); mtx_unlock_spin(&smp_tlb_mtx); } #endif void smp_invltlb(void) { #if defined(APIC_IO) if (smp_started) { smp_tlb_shootdown(IPI_INVLTLB, 0, 0); #ifdef COUNT_XINVLTLB_HITS ipi_global++; #endif } #endif /* APIC_IO */ } void smp_invlpg(vm_offset_t addr) { #if defined(APIC_IO) if (smp_started) { smp_tlb_shootdown(IPI_INVLPG, addr, 0); #ifdef COUNT_XINVLTLB_HITS ipi_page++; #endif } #endif /* APIC_IO */ } void smp_invlpg_range(vm_offset_t addr1, vm_offset_t addr2) { #if defined(APIC_IO) if (smp_started) { smp_tlb_shootdown(IPI_INVLRNG, addr1, addr2); #ifdef COUNT_XINVLTLB_HITS ipi_range++; ipi_range_size += (addr2 - addr1) / PAGE_SIZE; #endif } #endif /* APIC_IO */ } void smp_masked_invltlb(u_int mask) { #if defined(APIC_IO) if (smp_started) { smp_targeted_tlb_shootdown(mask, IPI_INVLTLB, 0, 0); #ifdef COUNT_XINVLTLB_HITS ipi_masked_global++; #endif } #endif /* APIC_IO */ } void smp_masked_invlpg(u_int mask, vm_offset_t addr) { #if defined(APIC_IO) if (smp_started) { smp_targeted_tlb_shootdown(mask, IPI_INVLPG, addr, 0); #ifdef COUNT_XINVLTLB_HITS ipi_masked_page++; #endif } #endif /* APIC_IO */ } void smp_masked_invlpg_range(u_int mask, vm_offset_t addr1, vm_offset_t addr2) { #if defined(APIC_IO) if (smp_started) { smp_targeted_tlb_shootdown(mask, IPI_INVLRNG, addr1, addr2); #ifdef COUNT_XINVLTLB_HITS ipi_masked_range++; ipi_masked_range_size += (addr2 - addr1) / PAGE_SIZE; #endif } #endif /* APIC_IO */ } /* * This is called once the rest of the system is up and running and we're * ready to let the AP's out of the pen. */ void ap_init(void) { u_int apic_id; /* spin until all the AP's are ready */ while (!aps_ready) ia32_pause(); /* BSP may have changed PTD while we were waiting */ invltlb(); #if defined(I586_CPU) && !defined(NO_F00F_HACK) lidt(&r_idt); #endif /* set up CPU registers and state */ cpu_setregs(); /* set up FPU state on the AP */ npxinit(__INITIAL_NPXCW__); /* set up SSE registers */ enable_sse(); /* A quick check from sanity claus */ apic_id = (apic_id_to_logical[(lapic.id & 0x0f000000) >> 24]); if (PCPU_GET(cpuid) != apic_id) { printf("SMP: cpuid = %d\n", PCPU_GET(cpuid)); printf("SMP: apic_id = %d\n", apic_id); printf("PTD[MPPTDI] = %p\n", (void *)PTD[MPPTDI]); panic("cpuid mismatch! boom!!"); } /* Init local apic for irq's */ apic_initialize(); /* Set memory range attributes for this CPU to match the BSP */ mem_range_AP_init(); mtx_lock_spin(&ap_boot_mtx); smp_cpus++; CTR1(KTR_SMP, "SMP: AP CPU #%d Launched", PCPU_GET(cpuid)); printf("SMP: AP CPU #%d Launched!\n", PCPU_GET(cpuid)); /* Build our map of 'other' CPUs. */ PCPU_SET(other_cpus, all_cpus & ~PCPU_GET(cpumask)); if (bootverbose) apic_dump("ap_init()"); if (smp_cpus == mp_ncpus) { /* enable IPI's, tlb shootdown, freezes etc */ atomic_store_rel_int(&smp_started, 1); smp_active = 1; /* historic */ } mtx_unlock_spin(&ap_boot_mtx); /* wait until all the AP's are up */ while (smp_started == 0) ia32_pause(); /* ok, now grab sched_lock and enter the scheduler */ mtx_lock_spin(&sched_lock); binuptime(PCPU_PTR(switchtime)); PCPU_SET(switchticks, ticks); cpu_throw(); /* doesn't return */ panic("scheduler returned us to %s", __func__); } /* * For statclock, we send an IPI to all CPU's to have them call this * function. * * WARNING! unpend() will call statclock_process() directly and skip this * routine. */ void forwarded_statclock(struct trapframe frame) { mtx_lock_spin(&sched_lock); statclock_process(curthread->td_kse, TRAPF_PC(&frame), TRAPF_USERMODE(&frame)); mtx_unlock_spin(&sched_lock); } void forward_statclock(void) { int map; CTR0(KTR_SMP, "forward_statclock"); if (!smp_started || cold || panicstr) return; map = PCPU_GET(other_cpus) & ~stopped_cpus ; if (map != 0) ipi_selected(map, IPI_STATCLOCK); } /* * For each hardclock(), we send an IPI to all other CPU's to have them * execute this function. It would be nice to reduce contention on * sched_lock if we could simply peek at the CPU to determine the user/kernel * state and call hardclock_process() on the CPU receiving the clock interrupt * and then just use a simple IPI to handle any ast's if needed. * * WARNING! unpend() will call hardclock_process() directly and skip this * routine. */ void forwarded_hardclock(struct trapframe frame) { mtx_lock_spin(&sched_lock); hardclock_process(curthread, TRAPF_USERMODE(&frame)); mtx_unlock_spin(&sched_lock); } void forward_hardclock(void) { u_int map; CTR0(KTR_SMP, "forward_hardclock"); if (!smp_started || cold || panicstr) return; map = PCPU_GET(other_cpus) & ~stopped_cpus ; if (map != 0) ipi_selected(map, IPI_HARDCLOCK); } #ifdef APIC_INTR_REORDER /* * Maintain mapping from softintr vector to isr bit in local apic. */ void set_lapic_isrloc(int intr, int vector) { if (intr < 0 || intr > 32) panic("set_apic_isrloc: bad intr argument: %d",intr); if (vector < ICU_OFFSET || vector > 255) panic("set_apic_isrloc: bad vector argument: %d",vector); apic_isrbit_location[intr].location = &lapic.isr0 + ((vector>>5)<<2); apic_isrbit_location[intr].bit = (1<<(vector & 31)); } #endif /* * send an IPI to a set of cpus. */ void ipi_selected(u_int32_t cpus, u_int ipi) { CTR3(KTR_SMP, "%s: cpus: %x ipi: %x", __func__, cpus, ipi); selected_apic_ipi(cpus, ipi, APIC_DELMODE_FIXED); } /* * send an IPI INTerrupt containing 'vector' to all CPUs, including myself */ void ipi_all(u_int ipi) { CTR2(KTR_SMP, "%s: ipi: %x", __func__, ipi); apic_ipi(APIC_DEST_ALLISELF, ipi, APIC_DELMODE_FIXED); } /* * send an IPI to all CPUs EXCEPT myself */ void ipi_all_but_self(u_int ipi) { CTR2(KTR_SMP, "%s: ipi: %x", __func__, ipi); apic_ipi(APIC_DEST_ALLESELF, ipi, APIC_DELMODE_FIXED); } /* * send an IPI to myself */ void ipi_self(u_int ipi) { CTR2(KTR_SMP, "%s: ipi: %x", __func__, ipi); apic_ipi(APIC_DEST_SELF, ipi, APIC_DELMODE_FIXED); } static void release_aps(void *dummy __unused) { mtx_lock_spin(&sched_lock); atomic_store_rel_int(&aps_ready, 1); while (smp_started == 0) ia32_pause(); mtx_unlock_spin(&sched_lock); } SYSINIT(start_aps, SI_SUB_SMP, SI_ORDER_FIRST, release_aps, NULL);