2 * Intel Multiprocessor Specification 1.1 and 1.4
3 * compliant MP-table parsing routines.
5 * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
6 * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
9 * Erich Boleyn : MP v1.4 and additional changes.
10 * Alan Cox : Added EBDA scanning
11 * Ingo Molnar : various cleanups and rewrites
12 * Maciej W. Rozycki: Bits for default MP configurations
13 * Paul Diefenbaugh: Added full ACPI support
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/bootmem.h>
20 #include <linux/smp_lock.h>
21 #include <linux/kernel_stat.h>
22 #include <linux/mc146818rtc.h>
23 #include <linux/acpi.h>
24 #include <linux/module.h>
28 #include <asm/mpspec.h>
29 #include <asm/pgalloc.h>
30 #include <asm/io_apic.h>
31 #include <asm/proto.h>
34 /* Have we found an MP table */
36 unsigned int __initdata maxcpus = NR_CPUS;
39 * Various Linux-internal data structures created from the
42 DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
43 int mp_bus_id_to_pci_bus [MAX_MP_BUSSES] = { [0 ... MAX_MP_BUSSES-1] = -1 };
45 static int mp_current_pci_id = 0;
46 /* I/O APIC entries */
47 struct mpc_config_ioapic mp_ioapics[MAX_IO_APICS];
49 /* # of MP IRQ source entries */
50 struct mpc_config_intsrc mp_irqs[MAX_IRQ_SOURCES];
52 /* MP IRQ source entries */
56 unsigned long mp_lapic_addr = 0;
60 /* Processor that is doing the boot up */
61 unsigned int boot_cpu_id = -1U;
62 /* Internal processor count */
63 unsigned int num_processors __initdata = 0;
65 unsigned disabled_cpus __initdata;
67 /* Bitmask of physically existing CPUs */
68 physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
70 u8 bios_cpu_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
74 * Intel MP BIOS table parsing routines:
78 * Checksum an MP configuration block.
81 static int __init mpf_checksum(unsigned char *mp, int len)
91 static void __cpuinit MP_processor_info (struct mpc_config_processor *m)
95 char *bootup_cpu = "";
97 if (!(m->mpc_cpuflag & CPU_ENABLED)) {
101 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
102 bootup_cpu = " (Bootup-CPU)";
103 boot_cpu_id = m->mpc_apicid;
106 printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu);
108 if (num_processors >= NR_CPUS) {
109 printk(KERN_WARNING "WARNING: NR_CPUS limit of %i reached."
110 " Processor ignored.\n", NR_CPUS);
115 cpus_complement(tmp_map, cpu_present_map);
116 cpu = first_cpu(tmp_map);
118 physid_set(m->mpc_apicid, phys_cpu_present_map);
119 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
121 * bios_cpu_apicid is required to have processors listed
122 * in same order as logical cpu numbers. Hence the first
123 * entry is BSP, and so on.
127 bios_cpu_apicid[cpu] = m->mpc_apicid;
128 x86_cpu_to_apicid[cpu] = m->mpc_apicid;
130 cpu_set(cpu, cpu_possible_map);
131 cpu_set(cpu, cpu_present_map);
134 static void __init MP_bus_info (struct mpc_config_bus *m)
138 memcpy(str, m->mpc_bustype, 6);
140 Dprintk("Bus #%d is %s\n", m->mpc_busid, str);
142 if (strncmp(str, "ISA", 3) == 0) {
143 set_bit(m->mpc_busid, mp_bus_not_pci);
144 } else if (strncmp(str, "PCI", 3) == 0) {
145 clear_bit(m->mpc_busid, mp_bus_not_pci);
146 mp_bus_id_to_pci_bus[m->mpc_busid] = mp_current_pci_id;
149 printk(KERN_ERR "Unknown bustype %s\n", str);
153 static int bad_ioapic(unsigned long address)
155 if (nr_ioapics >= MAX_IO_APICS) {
156 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
157 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
158 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
161 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
162 " found in table, skipping!\n");
168 static void __init MP_ioapic_info (struct mpc_config_ioapic *m)
170 if (!(m->mpc_flags & MPC_APIC_USABLE))
173 printk("I/O APIC #%d at 0x%X.\n",
174 m->mpc_apicid, m->mpc_apicaddr);
176 if (bad_ioapic(m->mpc_apicaddr))
179 mp_ioapics[nr_ioapics] = *m;
183 static void __init MP_intsrc_info (struct mpc_config_intsrc *m)
185 mp_irqs [mp_irq_entries] = *m;
186 Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
187 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
188 m->mpc_irqtype, m->mpc_irqflag & 3,
189 (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
190 m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
191 if (++mp_irq_entries >= MAX_IRQ_SOURCES)
192 panic("Max # of irq sources exceeded!!\n");
195 static void __init MP_lintsrc_info (struct mpc_config_lintsrc *m)
197 Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
198 " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
199 m->mpc_irqtype, m->mpc_irqflag & 3,
200 (m->mpc_irqflag >> 2) &3, m->mpc_srcbusid,
201 m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
208 static int __init smp_read_mpc(struct mp_config_table *mpc)
211 int count=sizeof(*mpc);
212 unsigned char *mpt=((unsigned char *)mpc)+count;
214 if (memcmp(mpc->mpc_signature,MPC_SIGNATURE,4)) {
215 printk("MPTABLE: bad signature [%c%c%c%c]!\n",
216 mpc->mpc_signature[0],
217 mpc->mpc_signature[1],
218 mpc->mpc_signature[2],
219 mpc->mpc_signature[3]);
222 if (mpf_checksum((unsigned char *)mpc,mpc->mpc_length)) {
223 printk("MPTABLE: checksum error!\n");
226 if (mpc->mpc_spec!=0x01 && mpc->mpc_spec!=0x04) {
227 printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
231 if (!mpc->mpc_lapic) {
232 printk(KERN_ERR "MPTABLE: null local APIC address!\n");
235 memcpy(str,mpc->mpc_oem,8);
237 printk(KERN_INFO "MPTABLE: OEM ID: %s ",str);
239 memcpy(str,mpc->mpc_productid,12);
241 printk("MPTABLE: Product ID: %s ",str);
243 printk("MPTABLE: APIC at: 0x%X\n",mpc->mpc_lapic);
245 /* save the local APIC address, it might be non-default */
247 mp_lapic_addr = mpc->mpc_lapic;
250 * Now process the configuration blocks.
252 while (count < mpc->mpc_length) {
256 struct mpc_config_processor *m=
257 (struct mpc_config_processor *)mpt;
259 MP_processor_info(m);
266 struct mpc_config_bus *m=
267 (struct mpc_config_bus *)mpt;
275 struct mpc_config_ioapic *m=
276 (struct mpc_config_ioapic *)mpt;
284 struct mpc_config_intsrc *m=
285 (struct mpc_config_intsrc *)mpt;
294 struct mpc_config_lintsrc *m=
295 (struct mpc_config_lintsrc *)mpt;
303 clustered_apic_check();
305 printk(KERN_ERR "MPTABLE: no processors registered!\n");
306 return num_processors;
309 static int __init ELCR_trigger(unsigned int irq)
313 port = 0x4d0 + (irq >> 3);
314 return (inb(port) >> (irq & 7)) & 1;
317 static void __init construct_default_ioirq_mptable(int mpc_default_type)
319 struct mpc_config_intsrc intsrc;
321 int ELCR_fallback = 0;
323 intsrc.mpc_type = MP_INTSRC;
324 intsrc.mpc_irqflag = 0; /* conforming */
325 intsrc.mpc_srcbus = 0;
326 intsrc.mpc_dstapic = mp_ioapics[0].mpc_apicid;
328 intsrc.mpc_irqtype = mp_INT;
331 * If true, we have an ISA/PCI system with no IRQ entries
332 * in the MP table. To prevent the PCI interrupts from being set up
333 * incorrectly, we try to use the ELCR. The sanity check to see if
334 * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
335 * never be level sensitive, so we simply see if the ELCR agrees.
336 * If it does, we assume it's valid.
338 if (mpc_default_type == 5) {
339 printk(KERN_INFO "ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
341 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || ELCR_trigger(13))
342 printk(KERN_ERR "ELCR contains invalid data... not using ELCR\n");
344 printk(KERN_INFO "Using ELCR to identify PCI interrupts\n");
349 for (i = 0; i < 16; i++) {
350 switch (mpc_default_type) {
352 if (i == 0 || i == 13)
353 continue; /* IRQ0 & IRQ13 not connected */
357 continue; /* IRQ2 is never connected */
362 * If the ELCR indicates a level-sensitive interrupt, we
363 * copy that information over to the MP table in the
364 * irqflag field (level sensitive, active high polarity).
367 intsrc.mpc_irqflag = 13;
369 intsrc.mpc_irqflag = 0;
372 intsrc.mpc_srcbusirq = i;
373 intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
374 MP_intsrc_info(&intsrc);
377 intsrc.mpc_irqtype = mp_ExtINT;
378 intsrc.mpc_srcbusirq = 0;
379 intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
380 MP_intsrc_info(&intsrc);
383 static inline void __init construct_default_ISA_mptable(int mpc_default_type)
385 struct mpc_config_processor processor;
386 struct mpc_config_bus bus;
387 struct mpc_config_ioapic ioapic;
388 struct mpc_config_lintsrc lintsrc;
389 int linttypes[2] = { mp_ExtINT, mp_NMI };
393 * local APIC has default address
395 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
398 * 2 CPUs, numbered 0 & 1.
400 processor.mpc_type = MP_PROCESSOR;
401 processor.mpc_apicver = 0;
402 processor.mpc_cpuflag = CPU_ENABLED;
403 processor.mpc_cpufeature = 0;
404 processor.mpc_featureflag = 0;
405 processor.mpc_reserved[0] = 0;
406 processor.mpc_reserved[1] = 0;
407 for (i = 0; i < 2; i++) {
408 processor.mpc_apicid = i;
409 MP_processor_info(&processor);
412 bus.mpc_type = MP_BUS;
414 switch (mpc_default_type) {
416 printk(KERN_ERR "???\nUnknown standard configuration %d\n",
421 memcpy(bus.mpc_bustype, "ISA ", 6);
425 if (mpc_default_type > 4) {
427 memcpy(bus.mpc_bustype, "PCI ", 6);
431 ioapic.mpc_type = MP_IOAPIC;
432 ioapic.mpc_apicid = 2;
433 ioapic.mpc_apicver = 0;
434 ioapic.mpc_flags = MPC_APIC_USABLE;
435 ioapic.mpc_apicaddr = 0xFEC00000;
436 MP_ioapic_info(&ioapic);
439 * We set up most of the low 16 IO-APIC pins according to MPS rules.
441 construct_default_ioirq_mptable(mpc_default_type);
443 lintsrc.mpc_type = MP_LINTSRC;
444 lintsrc.mpc_irqflag = 0; /* conforming */
445 lintsrc.mpc_srcbusid = 0;
446 lintsrc.mpc_srcbusirq = 0;
447 lintsrc.mpc_destapic = MP_APIC_ALL;
448 for (i = 0; i < 2; i++) {
449 lintsrc.mpc_irqtype = linttypes[i];
450 lintsrc.mpc_destapiclint = i;
451 MP_lintsrc_info(&lintsrc);
455 static struct intel_mp_floating *mpf_found;
458 * Scan the memory blocks for an SMP configuration block.
460 void __init get_smp_config (void)
462 struct intel_mp_floating *mpf = mpf_found;
465 * ACPI supports both logical (e.g. Hyper-Threading) and physical
466 * processors, where MPS only supports physical.
468 if (acpi_lapic && acpi_ioapic) {
469 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration information\n");
473 printk(KERN_INFO "Using ACPI for processor (LAPIC) configuration information\n");
475 printk("Intel MultiProcessor Specification v1.%d\n", mpf->mpf_specification);
478 * Now see if we need to read further.
480 if (mpf->mpf_feature1 != 0) {
482 printk(KERN_INFO "Default MP configuration #%d\n", mpf->mpf_feature1);
483 construct_default_ISA_mptable(mpf->mpf_feature1);
485 } else if (mpf->mpf_physptr) {
488 * Read the physical hardware table. Anything here will
489 * override the defaults.
491 if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr))) {
492 smp_found_config = 0;
493 printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
494 printk(KERN_ERR "... disabling SMP support. (tell your hw vendor)\n");
498 * If there are no explicit MP IRQ entries, then we are
499 * broken. We set up most of the low 16 IO-APIC pins to
500 * ISA defaults and hope it will work.
502 if (!mp_irq_entries) {
503 struct mpc_config_bus bus;
505 printk(KERN_ERR "BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
507 bus.mpc_type = MP_BUS;
509 memcpy(bus.mpc_bustype, "ISA ", 6);
512 construct_default_ioirq_mptable(0);
518 printk(KERN_INFO "Processors: %d\n", num_processors);
520 * Only use the first configuration found.
524 static int __init smp_scan_config (unsigned long base, unsigned long length)
526 extern void __bad_mpf_size(void);
527 unsigned int *bp = phys_to_virt(base);
528 struct intel_mp_floating *mpf;
530 Dprintk("Scan SMP from %p for %ld bytes.\n", bp,length);
531 if (sizeof(*mpf) != 16)
535 mpf = (struct intel_mp_floating *)bp;
536 if ((*bp == SMP_MAGIC_IDENT) &&
537 (mpf->mpf_length == 1) &&
538 !mpf_checksum((unsigned char *)bp, 16) &&
539 ((mpf->mpf_specification == 1)
540 || (mpf->mpf_specification == 4)) ) {
542 smp_found_config = 1;
543 reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE);
544 if (mpf->mpf_physptr)
545 reserve_bootmem_generic(mpf->mpf_physptr, PAGE_SIZE);
555 void __init find_smp_config(void)
557 unsigned int address;
560 * FIXME: Linux assumes you have 640K of base ram..
561 * this continues the error...
563 * 1) Scan the bottom 1K for a signature
564 * 2) Scan the top 1K of base RAM
565 * 3) Scan the 64K of bios
567 if (smp_scan_config(0x0,0x400) ||
568 smp_scan_config(639*0x400,0x400) ||
569 smp_scan_config(0xF0000,0x10000))
572 * If it is an SMP machine we should know now.
574 * there is a real-mode segmented pointer pointing to the
575 * 4K EBDA area at 0x40E, calculate and scan it here.
577 * NOTE! There are Linux loaders that will corrupt the EBDA
578 * area, and as such this kind of SMP config may be less
579 * trustworthy, simply because the SMP table may have been
580 * stomped on during early boot. These loaders are buggy and
584 address = *(unsigned short *)phys_to_virt(0x40E);
586 if (smp_scan_config(address, 0x1000))
589 /* If we have come this far, we did not find an MP table */
590 printk(KERN_INFO "No mptable found.\n");
593 /* --------------------------------------------------------------------------
594 ACPI-based MP Configuration
595 -------------------------------------------------------------------------- */
599 void __init mp_register_lapic_address(u64 address)
601 mp_lapic_addr = (unsigned long) address;
602 set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
603 if (boot_cpu_id == -1U)
604 boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));
607 void __cpuinit mp_register_lapic (u8 id, u8 enabled)
609 struct mpc_config_processor processor;
612 if (id == boot_cpu_id)
615 processor.mpc_type = MP_PROCESSOR;
616 processor.mpc_apicid = id;
617 processor.mpc_apicver = 0;
618 processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
619 processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
620 processor.mpc_cpufeature = 0;
621 processor.mpc_featureflag = 0;
622 processor.mpc_reserved[0] = 0;
623 processor.mpc_reserved[1] = 0;
625 MP_processor_info(&processor);
629 #define MP_MAX_IOAPIC_PIN 127
631 static struct mp_ioapic_routing {
635 u32 pin_programmed[4];
636 } mp_ioapic_routing[MAX_IO_APICS];
638 static int mp_find_ioapic(int gsi)
642 /* Find the IOAPIC that manages this GSI. */
643 for (i = 0; i < nr_ioapics; i++) {
644 if ((gsi >= mp_ioapic_routing[i].gsi_start)
645 && (gsi <= mp_ioapic_routing[i].gsi_end))
649 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
653 void __init mp_register_ioapic(u8 id, u32 address, u32 gsi_base)
657 if (bad_ioapic(address))
662 mp_ioapics[idx].mpc_type = MP_IOAPIC;
663 mp_ioapics[idx].mpc_flags = MPC_APIC_USABLE;
664 mp_ioapics[idx].mpc_apicaddr = address;
666 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
667 mp_ioapics[idx].mpc_apicid = id;
668 mp_ioapics[idx].mpc_apicver = 0;
671 * Build basic IRQ lookup table to facilitate gsi->io_apic lookups
672 * and to prevent reprogramming of IOAPIC pins (PCI IRQs).
674 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mpc_apicid;
675 mp_ioapic_routing[idx].gsi_start = gsi_base;
676 mp_ioapic_routing[idx].gsi_end = gsi_base +
677 io_apic_get_redir_entries(idx);
679 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, address 0x%x, "
680 "GSI %d-%d\n", idx, mp_ioapics[idx].mpc_apicid,
681 mp_ioapics[idx].mpc_apicaddr,
682 mp_ioapic_routing[idx].gsi_start,
683 mp_ioapic_routing[idx].gsi_end);
687 mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
689 struct mpc_config_intsrc intsrc;
694 * Convert 'gsi' to 'ioapic.pin'.
696 ioapic = mp_find_ioapic(gsi);
699 pin = gsi - mp_ioapic_routing[ioapic].gsi_start;
702 * TBD: This check is for faulty timer entries, where the override
703 * erroneously sets the trigger to level, resulting in a HUGE
704 * increase of timer interrupts!
706 if ((bus_irq == 0) && (trigger == 3))
709 intsrc.mpc_type = MP_INTSRC;
710 intsrc.mpc_irqtype = mp_INT;
711 intsrc.mpc_irqflag = (trigger << 2) | polarity;
712 intsrc.mpc_srcbus = MP_ISA_BUS;
713 intsrc.mpc_srcbusirq = bus_irq; /* IRQ */
714 intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid; /* APIC ID */
715 intsrc.mpc_dstirq = pin; /* INTIN# */
717 Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n",
718 intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
719 (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
720 intsrc.mpc_srcbusirq, intsrc.mpc_dstapic, intsrc.mpc_dstirq);
722 mp_irqs[mp_irq_entries] = intsrc;
723 if (++mp_irq_entries == MAX_IRQ_SOURCES)
724 panic("Max # of irq sources exceeded!\n");
727 void __init mp_config_acpi_legacy_irqs(void)
729 struct mpc_config_intsrc intsrc;
734 * Fabricate the legacy ISA bus (bus #31).
736 set_bit(MP_ISA_BUS, mp_bus_not_pci);
739 * Locate the IOAPIC that manages the ISA IRQs (0-15).
741 ioapic = mp_find_ioapic(0);
745 intsrc.mpc_type = MP_INTSRC;
746 intsrc.mpc_irqflag = 0; /* Conforming */
747 intsrc.mpc_srcbus = MP_ISA_BUS;
748 intsrc.mpc_dstapic = mp_ioapics[ioapic].mpc_apicid;
751 * Use the default configuration for the IRQs 0-15. Unless
752 * overridden by (MADT) interrupt source override entries.
754 for (i = 0; i < 16; i++) {
757 for (idx = 0; idx < mp_irq_entries; idx++) {
758 struct mpc_config_intsrc *irq = mp_irqs + idx;
760 /* Do we already have a mapping for this ISA IRQ? */
761 if (irq->mpc_srcbus == MP_ISA_BUS && irq->mpc_srcbusirq == i)
764 /* Do we already have a mapping for this IOAPIC pin */
765 if ((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
766 (irq->mpc_dstirq == i))
770 if (idx != mp_irq_entries) {
771 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
772 continue; /* IRQ already used */
775 intsrc.mpc_irqtype = mp_INT;
776 intsrc.mpc_srcbusirq = i; /* Identity mapped */
777 intsrc.mpc_dstirq = i;
779 Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, "
780 "%d-%d\n", intsrc.mpc_irqtype, intsrc.mpc_irqflag & 3,
781 (intsrc.mpc_irqflag >> 2) & 3, intsrc.mpc_srcbus,
782 intsrc.mpc_srcbusirq, intsrc.mpc_dstapic,
785 mp_irqs[mp_irq_entries] = intsrc;
786 if (++mp_irq_entries == MAX_IRQ_SOURCES)
787 panic("Max # of irq sources exceeded!\n");
791 int mp_register_gsi(u32 gsi, int triggering, int polarity)
797 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
800 /* Don't set up the ACPI SCI because it's already set up */
801 if (acpi_gbl_FADT.sci_interrupt == gsi)
804 ioapic = mp_find_ioapic(gsi);
806 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
810 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_start;
813 * Avoid pin reprogramming. PRTs typically include entries
814 * with redundant pin->gsi mappings (but unique PCI devices);
815 * we only program the IOAPIC on the first.
817 bit = ioapic_pin % 32;
818 idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32);
820 printk(KERN_ERR "Invalid reference to IOAPIC pin "
821 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
825 if ((1<<bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
826 Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
827 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
831 mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1<<bit);
833 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
834 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
835 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
838 #endif /*CONFIG_ACPI*/