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/mpapic.c,v 1.37.2.7 2003/01/25 02:31:47 peter Exp $
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <machine/globaldata.h>
32 #include <machine/smp.h>
33 #include <machine/cputypes.h>
34 #include <machine/md_var.h>
35 #include <machine/pmap.h>
36 #include <machine_base/apic/mpapic.h>
37 #include <machine/segments.h>
38 #include <sys/thread2.h>
40 #include <machine/intr_machdep.h>
43 extern pt_entry_t *SMPpt;
45 /* EISA Edge/Level trigger control registers */
46 #define ELCR0 0x4d0 /* eisa irq 0-7 */
47 #define ELCR1 0x4d1 /* eisa irq 8-15 */
56 TAILQ_ENTRY(ioapic_info) io_link;
58 TAILQ_HEAD(ioapic_info_list, ioapic_info);
61 struct ioapic_info_list ioc_list;
62 int ioc_intsrc[16]; /* XXX magic number */
65 static void lapic_timer_calibrate(void);
66 static void lapic_timer_set_divisor(int);
67 static void lapic_timer_fixup_handler(void *);
68 static void lapic_timer_restart_handler(void *);
70 void lapic_timer_process(void);
71 void lapic_timer_process_frame(struct intrframe *);
73 static int lapic_timer_enable = 1;
74 TUNABLE_INT("hw.lapic_timer_enable", &lapic_timer_enable);
76 static void lapic_timer_intr_reload(struct cputimer_intr *, sysclock_t);
77 static void lapic_timer_intr_enable(struct cputimer_intr *);
78 static void lapic_timer_intr_restart(struct cputimer_intr *);
79 static void lapic_timer_intr_pmfixup(struct cputimer_intr *);
81 static struct cputimer_intr lapic_cputimer_intr = {
83 .reload = lapic_timer_intr_reload,
84 .enable = lapic_timer_intr_enable,
85 .config = cputimer_intr_default_config,
86 .restart = lapic_timer_intr_restart,
87 .pmfixup = lapic_timer_intr_pmfixup,
88 .initclock = cputimer_intr_default_initclock,
89 .next = SLIST_ENTRY_INITIALIZER,
91 .type = CPUTIMER_INTR_LAPIC,
92 .prio = CPUTIMER_INTR_PRIO_LAPIC,
93 .caps = CPUTIMER_INTR_CAP_NONE
97 * pointers to pmapped apic hardware.
100 volatile ioapic_t **ioapic;
102 static int lapic_timer_divisor_idx = -1;
103 static const uint32_t lapic_timer_divisors[] = {
104 APIC_TDCR_2, APIC_TDCR_4, APIC_TDCR_8, APIC_TDCR_16,
105 APIC_TDCR_32, APIC_TDCR_64, APIC_TDCR_128, APIC_TDCR_1
107 #define APIC_TIMER_NDIVISORS (int)(NELEM(lapic_timer_divisors))
111 static struct ioapic_conf ioapic_conf;
114 * Enable LAPIC, configure interrupts.
117 apic_initialize(boolean_t bsp)
123 * Setup LINT0 as ExtINT on the BSP. This is theoretically an
124 * aggregate interrupt input from the 8259. The INTA cycle
125 * will be routed to the external controller (the 8259) which
126 * is expected to supply the vector.
128 * Must be setup edge triggered, active high.
130 * Disable LINT0 on the APs. It doesn't matter what delivery
131 * mode we use because we leave it masked.
133 temp = lapic.lvt_lint0;
134 temp &= ~(APIC_LVT_MASKED | APIC_LVT_TRIG_MASK |
135 APIC_LVT_POLARITY_MASK | APIC_LVT_DM_MASK);
136 if (mycpu->gd_cpuid == 0)
137 temp |= APIC_LVT_DM_EXTINT;
139 temp |= APIC_LVT_DM_FIXED | APIC_LVT_MASKED;
140 lapic.lvt_lint0 = temp;
143 * Setup LINT1 as NMI, masked till later.
144 * Edge trigger, active high.
146 temp = lapic.lvt_lint1;
147 temp &= ~(APIC_LVT_MASKED | APIC_LVT_TRIG_MASK |
148 APIC_LVT_POLARITY_MASK | APIC_LVT_DM_MASK);
149 temp |= APIC_LVT_MASKED | APIC_LVT_DM_NMI;
150 lapic.lvt_lint1 = temp;
153 * Mask the LAPIC error interrupt, LAPIC performance counter
156 lapic.lvt_error = lapic.lvt_error | APIC_LVT_MASKED;
157 lapic.lvt_pcint = lapic.lvt_pcint | APIC_LVT_MASKED;
160 * Set LAPIC timer vector and mask the LAPIC timer interrupt.
162 timer = lapic.lvt_timer;
163 timer &= ~APIC_LVTT_VECTOR;
164 timer |= XTIMER_OFFSET;
165 timer |= APIC_LVTT_MASKED;
166 lapic.lvt_timer = timer;
169 * Set the Task Priority Register as needed. At the moment allow
170 * interrupts on all cpus (the APs will remain CLId until they are
171 * ready to deal). We could disable all but IPIs by setting
172 * temp |= TPR_IPI for cpu != 0.
175 temp &= ~APIC_TPR_PRIO; /* clear priority field */
176 #ifdef SMP /* APIC-IO */
177 if (!apic_io_enable) {
180 * If we are NOT running the IO APICs, the LAPIC will only be used
181 * for IPIs. Set the TPR to prevent any unintentional interrupts.
184 #ifdef SMP /* APIC-IO */
194 temp |= APIC_SVR_ENABLE; /* enable the LAPIC */
195 temp &= ~APIC_SVR_FOCUS_DISABLE; /* enable lopri focus processor */
198 * Set the spurious interrupt vector. The low 4 bits of the vector
201 if ((XSPURIOUSINT_OFFSET & 0x0F) != 0x0F)
202 panic("bad XSPURIOUSINT_OFFSET: 0x%08x", XSPURIOUSINT_OFFSET);
203 temp &= ~APIC_SVR_VECTOR;
204 temp |= XSPURIOUSINT_OFFSET;
209 * Pump out a few EOIs to clean out interrupts that got through
210 * before we were able to set the TPR.
217 lapic_timer_calibrate();
218 if (lapic_timer_enable) {
219 cputimer_intr_register(&lapic_cputimer_intr);
220 cputimer_intr_select(&lapic_cputimer_intr, 0);
223 lapic_timer_set_divisor(lapic_timer_divisor_idx);
227 apic_dump("apic_initialize()");
231 lapic_timer_set_divisor(int divisor_idx)
233 KKASSERT(divisor_idx >= 0 && divisor_idx < APIC_TIMER_NDIVISORS);
234 lapic.dcr_timer = lapic_timer_divisors[divisor_idx];
238 lapic_timer_oneshot(u_int count)
242 value = lapic.lvt_timer;
243 value &= ~APIC_LVTT_PERIODIC;
244 lapic.lvt_timer = value;
245 lapic.icr_timer = count;
249 lapic_timer_oneshot_quick(u_int count)
251 lapic.icr_timer = count;
255 lapic_timer_calibrate(void)
259 /* Try to calibrate the local APIC timer. */
260 for (lapic_timer_divisor_idx = 0;
261 lapic_timer_divisor_idx < APIC_TIMER_NDIVISORS;
262 lapic_timer_divisor_idx++) {
263 lapic_timer_set_divisor(lapic_timer_divisor_idx);
264 lapic_timer_oneshot(APIC_TIMER_MAX_COUNT);
266 value = APIC_TIMER_MAX_COUNT - lapic.ccr_timer;
267 if (value != APIC_TIMER_MAX_COUNT)
270 if (lapic_timer_divisor_idx >= APIC_TIMER_NDIVISORS)
271 panic("lapic: no proper timer divisor?!\n");
272 lapic_cputimer_intr.freq = value / 2;
274 kprintf("lapic: divisor index %d, frequency %u Hz\n",
275 lapic_timer_divisor_idx, lapic_cputimer_intr.freq);
279 lapic_timer_process_oncpu(struct globaldata *gd, struct intrframe *frame)
283 gd->gd_timer_running = 0;
285 count = sys_cputimer->count();
286 if (TAILQ_FIRST(&gd->gd_systimerq) != NULL)
287 systimer_intr(&count, 0, frame);
291 lapic_timer_process(void)
293 lapic_timer_process_oncpu(mycpu, NULL);
297 lapic_timer_process_frame(struct intrframe *frame)
299 lapic_timer_process_oncpu(mycpu, frame);
303 lapic_timer_intr_reload(struct cputimer_intr *cti, sysclock_t reload)
305 struct globaldata *gd = mycpu;
307 reload = (int64_t)reload * cti->freq / sys_cputimer->freq;
311 if (gd->gd_timer_running) {
312 if (reload < lapic.ccr_timer)
313 lapic_timer_oneshot_quick(reload);
315 gd->gd_timer_running = 1;
316 lapic_timer_oneshot_quick(reload);
321 lapic_timer_intr_enable(struct cputimer_intr *cti __unused)
325 timer = lapic.lvt_timer;
326 timer &= ~(APIC_LVTT_MASKED | APIC_LVTT_PERIODIC);
327 lapic.lvt_timer = timer;
329 lapic_timer_fixup_handler(NULL);
333 lapic_timer_fixup_handler(void *arg)
340 if (cpu_vendor_id == CPU_VENDOR_AMD) {
342 * Detect the presence of C1E capability mostly on latest
343 * dual-cores (or future) k8 family. This feature renders
344 * the local APIC timer dead, so we disable it by reading
345 * the Interrupt Pending Message register and clearing both
346 * C1eOnCmpHalt (bit 28) and SmiOnCmpHalt (bit 27).
349 * "BIOS and Kernel Developer's Guide for AMD NPT
350 * Family 0Fh Processors"
351 * #32559 revision 3.00
353 if ((cpu_id & 0x00000f00) == 0x00000f00 &&
354 (cpu_id & 0x0fff0000) >= 0x00040000) {
357 msr = rdmsr(0xc0010055);
358 if (msr & 0x18000000) {
359 struct globaldata *gd = mycpu;
361 kprintf("cpu%d: AMD C1E detected\n",
363 wrmsr(0xc0010055, msr & ~0x18000000ULL);
366 * We are kinda stalled;
369 gd->gd_timer_running = 1;
370 lapic_timer_oneshot_quick(2);
380 lapic_timer_restart_handler(void *dummy __unused)
384 lapic_timer_fixup_handler(&started);
386 struct globaldata *gd = mycpu;
388 gd->gd_timer_running = 1;
389 lapic_timer_oneshot_quick(2);
394 * This function is called only by ACPI-CA code currently:
395 * - AMD C1E fixup. AMD C1E only seems to happen after ACPI
396 * module controls PM. So once ACPI-CA is attached, we try
397 * to apply the fixup to prevent LAPIC timer from hanging.
400 lapic_timer_intr_pmfixup(struct cputimer_intr *cti __unused)
402 lwkt_send_ipiq_mask(smp_active_mask,
403 lapic_timer_fixup_handler, NULL);
407 lapic_timer_intr_restart(struct cputimer_intr *cti __unused)
409 lwkt_send_ipiq_mask(smp_active_mask, lapic_timer_restart_handler, NULL);
414 * dump contents of local APIC registers
419 kprintf("SMP: CPU%d %s:\n", mycpu->gd_cpuid, str);
420 kprintf(" lint0: 0x%08x lint1: 0x%08x TPR: 0x%08x SVR: 0x%08x\n",
421 lapic.lvt_lint0, lapic.lvt_lint1, lapic.tpr, lapic.svr);
425 #ifdef SMP /* APIC-IO */
431 #define IOAPIC_ISA_INTS 16
432 #define REDIRCNT_IOAPIC(A) \
433 ((int)((io_apic_versions[(A)] & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) + 1)
435 static int trigger (int apic, int pin, u_int32_t * flags);
436 static void polarity (int apic, int pin, u_int32_t * flags, int level);
438 #define DEFAULT_FLAGS \
444 #define DEFAULT_ISA_FLAGS \
453 io_apic_set_id(int apic, int id)
457 ux = ioapic_read(ioapic[apic], IOAPIC_ID); /* get current contents */
458 if (((ux & APIC_ID_MASK) >> 24) != id) {
459 kprintf("Changing APIC ID for IO APIC #%d"
460 " from %d to %d on chip\n",
461 apic, ((ux & APIC_ID_MASK) >> 24), id);
462 ux &= ~APIC_ID_MASK; /* clear the ID field */
464 ioapic_write(ioapic[apic], IOAPIC_ID, ux); /* write new value */
465 ux = ioapic_read(ioapic[apic], IOAPIC_ID); /* re-read && test */
466 if (((ux & APIC_ID_MASK) >> 24) != id)
467 panic("can't control IO APIC #%d ID, reg: 0x%08x",
474 io_apic_get_id(int apic)
476 return (ioapic_read(ioapic[apic], IOAPIC_ID) & APIC_ID_MASK) >> 24;
485 io_apic_setup_intpin(int apic, int pin)
487 int bus, bustype, irq;
488 u_char select; /* the select register is 8 bits */
489 u_int32_t flags; /* the window register is 32 bits */
490 u_int32_t target; /* the window register is 32 bits */
491 u_int32_t vector; /* the window register is 32 bits */
496 select = pin * 2 + IOAPIC_REDTBL0; /* register */
499 * Always clear an IO APIC pin before [re]programming it. This is
500 * particularly important if the pin is set up for a level interrupt
501 * as the IOART_REM_IRR bit might be set. When we reprogram the
502 * vector any EOI from pending ints on this pin could be lost and
503 * IRR might never get reset.
505 * To fix this problem, clear the vector and make sure it is
506 * programmed as an edge interrupt. This should theoretically
507 * clear IRR so we can later, safely program it as a level
512 flags = ioapic_read(ioapic[apic], select) & IOART_RESV;
513 flags |= IOART_INTMSET | IOART_TRGREDG | IOART_INTAHI;
514 flags |= IOART_DESTPHY | IOART_DELFIXED;
516 target = ioapic_read(ioapic[apic], select + 1) & IOART_HI_DEST_RESV;
517 target |= 0; /* fixed mode cpu mask of 0 - don't deliver anywhere */
521 ioapic_write(ioapic[apic], select, flags | vector);
522 ioapic_write(ioapic[apic], select + 1, target);
527 * We only deal with vectored interrupts here. ? documentation is
528 * lacking, I'm guessing an interrupt type of 0 is the 'INT' type,
531 * This test also catches unconfigured pins.
533 if (apic_int_type(apic, pin) != 0)
537 * Leave the pin unprogrammed if it does not correspond to
540 irq = apic_irq(apic, pin);
544 /* determine the bus type for this pin */
545 bus = apic_src_bus_id(apic, pin);
548 bustype = apic_bus_type(bus);
550 if ((bustype == ISA) &&
551 (pin < IOAPIC_ISA_INTS) &&
553 (apic_polarity(apic, pin) == 0x1) &&
554 (apic_trigger(apic, pin) == 0x3)) {
556 * A broken BIOS might describe some ISA
557 * interrupts as active-high level-triggered.
558 * Use default ISA flags for those interrupts.
560 flags = DEFAULT_ISA_FLAGS;
563 * Program polarity and trigger mode according to
566 flags = DEFAULT_FLAGS;
567 level = trigger(apic, pin, &flags);
569 int_to_apicintpin[irq].flags |= IOAPIC_IM_FLAG_LEVEL;
570 polarity(apic, pin, &flags, level);
574 ksnprintf(envpath, sizeof(envpath), "hw.irq.%d.dest", irq);
575 kgetenv_int(envpath, &cpuid);
577 /* ncpus may not be available yet */
582 kprintf("IOAPIC #%d intpin %d -> irq %d (CPU%d)\n",
583 apic, pin, irq, cpuid);
587 * Program the appropriate registers. This routing may be
588 * overridden when an interrupt handler for a device is
589 * actually added (see register_int(), which calls through
590 * the MACHINTR ABI to set up an interrupt handler/vector).
592 * The order in which we must program the two registers for
593 * safety is unclear! XXX
597 vector = IDT_OFFSET + irq; /* IDT vec */
598 target = ioapic_read(ioapic[apic], select + 1) & IOART_HI_DEST_RESV;
599 /* Deliver all interrupts to CPU0 (BSP) */
600 target |= (CPU_TO_ID(cpuid) << IOART_HI_DEST_SHIFT) &
602 flags |= ioapic_read(ioapic[apic], select) & IOART_RESV;
603 ioapic_write(ioapic[apic], select, flags | vector);
604 ioapic_write(ioapic[apic], select + 1, target);
610 io_apic_setup(int apic)
615 maxpin = REDIRCNT_IOAPIC(apic); /* pins in APIC */
616 kprintf("Programming %d pins in IOAPIC #%d\n", maxpin, apic);
618 for (pin = 0; pin < maxpin; ++pin) {
619 io_apic_setup_intpin(apic, pin);
622 if (apic_int_type(apic, pin) >= 0) {
623 kprintf("Warning: IOAPIC #%d pin %d does not exist,"
624 " cannot program!\n", apic, pin);
629 /* return GOOD status */
632 #undef DEFAULT_ISA_FLAGS
636 #define DEFAULT_EXTINT_FLAGS \
645 * XXX this function is only used by 8254 setup
646 * Setup the source of External INTerrupts.
649 ext_int_setup(int apic, int intr)
651 u_char select; /* the select register is 8 bits */
652 u_int32_t flags; /* the window register is 32 bits */
653 u_int32_t target; /* the window register is 32 bits */
654 u_int32_t vector; /* the window register is 32 bits */
658 if (apic_int_type(apic, intr) != 3)
662 ksnprintf(envpath, sizeof(envpath), "hw.irq.%d.dest", intr);
663 kgetenv_int(envpath, &cpuid);
665 /* ncpus may not be available yet */
669 /* Deliver interrupts to CPU0 (BSP) */
670 target = (CPU_TO_ID(cpuid) << IOART_HI_DEST_SHIFT) &
672 select = IOAPIC_REDTBL0 + (2 * intr);
673 vector = IDT_OFFSET + intr;
674 flags = DEFAULT_EXTINT_FLAGS;
676 ioapic_write(ioapic[apic], select, flags | vector);
677 ioapic_write(ioapic[apic], select + 1, target);
681 #undef DEFAULT_EXTINT_FLAGS
685 * Set the trigger level for an IO APIC pin.
688 trigger(int apic, int pin, u_int32_t * flags)
693 static int intcontrol = -1;
695 switch (apic_trigger(apic, pin)) {
701 *flags &= ~IOART_TRGRLVL; /* *flags |= IOART_TRGREDG */
705 *flags |= IOART_TRGRLVL;
713 if ((id = apic_src_bus_id(apic, pin)) == -1)
716 switch (apic_bus_type(id)) {
718 *flags &= ~IOART_TRGRLVL; /* *flags |= IOART_TRGREDG; */
722 eirq = apic_src_bus_irq(apic, pin);
724 if (eirq < 0 || eirq > 15) {
725 kprintf("EISA IRQ %d?!?!\n", eirq);
729 if (intcontrol == -1) {
730 intcontrol = inb(ELCR1) << 8;
731 intcontrol |= inb(ELCR0);
732 kprintf("EISA INTCONTROL = %08x\n", intcontrol);
735 /* Use ELCR settings to determine level or edge mode */
736 level = (intcontrol >> eirq) & 1;
739 * Note that on older Neptune chipset based systems, any
740 * pci interrupts often show up here and in the ELCR as well
741 * as level sensitive interrupts attributed to the EISA bus.
745 *flags |= IOART_TRGRLVL;
747 *flags &= ~IOART_TRGRLVL;
752 *flags |= IOART_TRGRLVL;
761 panic("bad APIC IO INT flags");
766 * Set the polarity value for an IO APIC pin.
769 polarity(int apic, int pin, u_int32_t * flags, int level)
773 switch (apic_polarity(apic, pin)) {
779 *flags &= ~IOART_INTALO; /* *flags |= IOART_INTAHI */
783 *flags |= IOART_INTALO;
791 if ((id = apic_src_bus_id(apic, pin)) == -1)
794 switch (apic_bus_type(id)) {
796 *flags &= ~IOART_INTALO; /* *flags |= IOART_INTAHI */
800 /* polarity converter always gives active high */
801 *flags &= ~IOART_INTALO;
805 *flags |= IOART_INTALO;
814 panic("bad APIC IO INT flags");
819 * Print contents of unmasked IRQs.
826 kprintf("SMP: enabled INTs: ");
827 for (x = 0; x < APIC_INTMAPSIZE; ++x) {
828 if ((int_to_apicintpin[x].flags & IOAPIC_IM_FLAG_MASKED) == 0)
836 * Inter Processor Interrupt functions.
839 #endif /* SMP APIC-IO */
842 * Send APIC IPI 'vector' to 'destType' via 'deliveryMode'.
844 * destType is 1 of: APIC_DEST_SELF, APIC_DEST_ALLISELF, APIC_DEST_ALLESELF
845 * vector is any valid SYSTEM INT vector
846 * delivery_mode is 1 of: APIC_DELMODE_FIXED, APIC_DELMODE_LOWPRIO
848 * A backlog of requests can create a deadlock between cpus. To avoid this
849 * we have to be able to accept IPIs at the same time we are trying to send
850 * them. The critical section prevents us from attempting to send additional
851 * IPIs reentrantly, but also prevents IPIQ processing so we have to call
852 * lwkt_process_ipiq() manually. It's rather messy and expensive for this
853 * to occur but fortunately it does not happen too often.
856 apic_ipi(int dest_type, int vector, int delivery_mode)
861 if ((lapic.icr_lo & APIC_DELSTAT_MASK) != 0) {
862 unsigned int eflags = read_eflags();
864 DEBUG_PUSH_INFO("apic_ipi");
865 while ((lapic.icr_lo & APIC_DELSTAT_MASK) != 0) {
869 write_eflags(eflags);
872 icr_lo = (lapic.icr_lo & APIC_ICRLO_RESV_MASK) | dest_type |
873 delivery_mode | vector;
874 lapic.icr_lo = icr_lo;
880 single_apic_ipi(int cpu, int vector, int delivery_mode)
886 if ((lapic.icr_lo & APIC_DELSTAT_MASK) != 0) {
887 unsigned int eflags = read_eflags();
889 DEBUG_PUSH_INFO("single_apic_ipi");
890 while ((lapic.icr_lo & APIC_DELSTAT_MASK) != 0) {
894 write_eflags(eflags);
896 icr_hi = lapic.icr_hi & ~APIC_ID_MASK;
897 icr_hi |= (CPU_TO_ID(cpu) << 24);
898 lapic.icr_hi = icr_hi;
901 icr_lo = (lapic.icr_lo & APIC_ICRLO_RESV_MASK)
902 | APIC_DEST_DESTFLD | delivery_mode | vector;
905 lapic.icr_lo = icr_lo;
912 * Returns 0 if the apic is busy, 1 if we were able to queue the request.
914 * NOT WORKING YET! The code as-is may end up not queueing an IPI at all
915 * to the target, and the scheduler does not 'poll' for IPI messages.
918 single_apic_ipi_passive(int cpu, int vector, int delivery_mode)
924 if ((lapic.icr_lo & APIC_DELSTAT_MASK) != 0) {
928 icr_hi = lapic.icr_hi & ~APIC_ID_MASK;
929 icr_hi |= (CPU_TO_ID(cpu) << 24);
930 lapic.icr_hi = icr_hi;
933 icr_lo = (lapic.icr_lo & APIC_RESV2_MASK)
934 | APIC_DEST_DESTFLD | delivery_mode | vector;
937 lapic.icr_lo = icr_lo;
945 * Send APIC IPI 'vector' to 'target's via 'delivery_mode'.
947 * target is a bitmask of destination cpus. Vector is any
948 * valid system INT vector. Delivery mode may be either
949 * APIC_DELMODE_FIXED or APIC_DELMODE_LOWPRIO.
952 selected_apic_ipi(cpumask_t target, int vector, int delivery_mode)
956 int n = BSFCPUMASK(target);
957 target &= ~CPUMASK(n);
958 single_apic_ipi(n, vector, delivery_mode);
964 * Timer code, in development...
965 * - suggested by rgrimes@gndrsh.aac.dev.com
968 get_apic_timer_frequency(void)
970 return(lapic_cputimer_intr.freq);
974 * Load a 'downcount time' in uSeconds.
977 set_apic_timer(int us)
982 * When we reach here, lapic timer's frequency
983 * must have been calculated as well as the
984 * divisor (lapic.dcr_timer is setup during the
985 * divisor calculation).
987 KKASSERT(lapic_cputimer_intr.freq != 0 &&
988 lapic_timer_divisor_idx >= 0);
990 count = ((us * (int64_t)lapic_cputimer_intr.freq) + 999999) / 1000000;
991 lapic_timer_oneshot(count);
996 * Read remaining time in timer.
999 read_apic_timer(void)
1002 /** XXX FIXME: we need to return the actual remaining time,
1003 * for now we just return the remaining count.
1006 return lapic.ccr_timer;
1012 * Spin-style delay, set delay time in uS, spin till it drains.
1017 set_apic_timer(count);
1018 while (read_apic_timer())
1023 lapic_map(vm_offset_t lapic_addr)
1025 /* Local apic is mapped on last page */
1026 SMPpt[NPTEPG - 1] = (pt_entry_t)(PG_V | PG_RW | PG_N |
1027 pmap_get_pgeflag() | (lapic_addr & PG_FRAME));
1029 kprintf("lapic: at %p\n", (void *)lapic_addr);
1032 static TAILQ_HEAD(, lapic_enumerator) lapic_enumerators =
1033 TAILQ_HEAD_INITIALIZER(lapic_enumerators);
1038 struct lapic_enumerator *e;
1041 TAILQ_FOREACH(e, &lapic_enumerators, lapic_link) {
1042 error = e->lapic_probe(e);
1047 panic("can't config lapic\n");
1049 e->lapic_enumerate(e);
1053 lapic_enumerator_register(struct lapic_enumerator *ne)
1055 struct lapic_enumerator *e;
1057 TAILQ_FOREACH(e, &lapic_enumerators, lapic_link) {
1058 if (e->lapic_prio < ne->lapic_prio) {
1059 TAILQ_INSERT_BEFORE(e, ne, lapic_link);
1063 TAILQ_INSERT_TAIL(&lapic_enumerators, ne, lapic_link);
1066 static TAILQ_HEAD(, ioapic_enumerator) ioapic_enumerators =
1067 TAILQ_HEAD_INITIALIZER(ioapic_enumerators);
1072 struct ioapic_enumerator *e;
1075 TAILQ_INIT(&ioapic_conf.ioc_list);
1076 /* XXX magic number */
1077 for (i = 0; i < 16; ++i)
1078 ioapic_conf.ioc_intsrc[i] = -1;
1080 TAILQ_FOREACH(e, &ioapic_enumerators, ioapic_link) {
1081 error = e->ioapic_probe(e);
1087 panic("can't config I/O APIC\n");
1089 kprintf("no I/O APIC\n");
1094 e->ioapic_enumerate(e);
1096 if (!ioapic_use_old) {
1097 struct ioapic_info *info;
1100 TAILQ_FOREACH(info, &ioapic_conf.ioc_list, io_link) {
1101 const struct ioapic_info *prev_info;
1104 info->io_apic_id = info->io_idx + lapic_id_max + 1;
1106 /* TODO set apic id, config all pins */
1109 kprintf("IOAPIC: idx %d, apic id %d, "
1110 "gsi base %d, npin %d\n",
1117 /* Warning about possible GSI hole */
1118 prev_info = TAILQ_PREV(info, ioapic_info_list, io_link);
1119 if (prev_info != NULL) {
1120 if (info->io_gsi_base !=
1121 prev_info->io_gsi_base + prev_info->io_npin) {
1122 kprintf("IOAPIC: warning gsi hole "
1124 prev_info->io_gsi_base +
1126 info->io_gsi_base - 1);
1130 panic("ioapic_config: new ioapic not working yet\n");
1135 ioapic_enumerator_register(struct ioapic_enumerator *ne)
1137 struct ioapic_enumerator *e;
1139 TAILQ_FOREACH(e, &ioapic_enumerators, ioapic_link) {
1140 if (e->ioapic_prio < ne->ioapic_prio) {
1141 TAILQ_INSERT_BEFORE(e, ne, ioapic_link);
1145 TAILQ_INSERT_TAIL(&ioapic_enumerators, ne, ioapic_link);
1149 ioapic_add(void *addr, int gsi_base, int npin)
1151 struct ioapic_info *info, *ninfo;
1154 gsi_end = gsi_base + npin - 1;
1155 TAILQ_FOREACH(info, &ioapic_conf.ioc_list, io_link) {
1156 if ((gsi_base >= info->io_gsi_base &&
1157 gsi_base < info->io_gsi_base + info->io_npin) ||
1158 (gsi_end >= info->io_gsi_base &&
1159 gsi_end < info->io_gsi_base + info->io_npin)) {
1160 panic("ioapic_add: overlapped gsi, base %d npin %d, "
1161 "hit base %d, npin %d\n", gsi_base, npin,
1162 info->io_gsi_base, info->io_npin);
1164 if (info->io_addr == addr)
1165 panic("ioapic_add: duplicated addr %p\n", addr);
1168 ninfo = kmalloc(sizeof(*ninfo), M_DEVBUF, M_WAITOK | M_ZERO);
1169 ninfo->io_addr = addr;
1170 ninfo->io_npin = npin;
1171 ninfo->io_gsi_base = gsi_base;
1174 * Create IOAPIC list in ascending order of GSI base
1176 TAILQ_FOREACH_REVERSE(info, &ioapic_conf.ioc_list,
1177 ioapic_info_list, io_link) {
1178 if (ninfo->io_gsi_base > info->io_gsi_base) {
1179 TAILQ_INSERT_AFTER(&ioapic_conf.ioc_list,
1180 info, ninfo, io_link);
1185 TAILQ_INSERT_HEAD(&ioapic_conf.ioc_list, ninfo, io_link);
1189 ioapic_intsrc(int irq, int gsi)
1192 if (ioapic_conf.ioc_intsrc[irq] != -1 &&
1193 ioapic_conf.ioc_intsrc[irq] != gsi) {
1194 kprintf("IOAPIC: warning intsrc irq %d, gsi %d -> gsi %d\n",
1195 irq, ioapic_conf.ioc_intsrc[irq], gsi);
1197 ioapic_conf.ioc_intsrc[irq] = gsi;