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/kernel_stat.h>
21 #include <linux/mc146818rtc.h>
22 #include <linux/acpi.h>
23 #include <linux/module.h>
27 #include <asm/mpspec.h>
28 #include <asm/pgalloc.h>
29 #include <asm/io_apic.h>
30 #include <asm/proto.h>
32 #include <asm/bios_ebda.h>
34 #include <mach_apic.h>
36 /* Have we found an MP table */
40 * Various Linux-internal data structures created from the
43 DECLARE_BITMAP(mp_bus_not_pci
, MAX_MP_BUSSES
);
44 int mp_bus_id_to_pci_bus
[MAX_MP_BUSSES
] = {[0 ... MAX_MP_BUSSES
- 1] = -1 };
46 static int mp_current_pci_id
= 0;
47 /* I/O APIC entries */
48 struct mpc_config_ioapic mp_ioapics
[MAX_IO_APICS
];
50 /* # of MP IRQ source entries */
51 struct mpc_config_intsrc mp_irqs
[MAX_IRQ_SOURCES
];
53 /* MP IRQ source entries */
59 u16 x86_bios_cpu_apicid_init
[NR_CPUS
] __initdata
60 = {[0 ... NR_CPUS
- 1] = BAD_APICID
};
61 void *x86_bios_cpu_apicid_early_ptr
;
63 DEFINE_PER_CPU(u16
, x86_bios_cpu_apicid
) = BAD_APICID
;
64 EXPORT_PER_CPU_SYMBOL(x86_bios_cpu_apicid
);
66 /* Make it easy to share the UP and SMP code: */
67 #ifndef CONFIG_X86_SMP
68 unsigned int num_processors
;
69 unsigned disabled_cpus __cpuinitdata
;
70 #ifndef CONFIG_X86_LOCAL_APIC
71 unsigned int boot_cpu_physical_apicid
= -1U;
75 /* Make it easy to share the UP and SMP code: */
76 #ifndef CONFIG_X86_SMP
77 physid_mask_t phys_cpu_present_map
;
81 * Intel MP BIOS table parsing routines:
85 * Checksum an MP configuration block.
88 static int __init
mpf_checksum(unsigned char *mp
, int len
)
98 static void __cpuinit
MP_processor_info(struct mpc_config_processor
*m
)
100 char *bootup_cpu
= "";
102 if (!(m
->mpc_cpuflag
& CPU_ENABLED
)) {
106 if (m
->mpc_cpuflag
& CPU_BOOTPROCESSOR
) {
107 bootup_cpu
= " (Bootup-CPU)";
108 boot_cpu_physical_apicid
= m
->mpc_apicid
;
111 printk(KERN_INFO
"Processor #%d%s\n", m
->mpc_apicid
, bootup_cpu
);
112 generic_processor_info(m
->mpc_apicid
, 0);
115 static void __init
MP_bus_info(struct mpc_config_bus
*m
)
119 memcpy(str
, m
->mpc_bustype
, 6);
121 Dprintk("Bus #%d is %s\n", m
->mpc_busid
, str
);
123 if (strncmp(str
, "ISA", 3) == 0) {
124 set_bit(m
->mpc_busid
, mp_bus_not_pci
);
125 } else if (strncmp(str
, "PCI", 3) == 0) {
126 clear_bit(m
->mpc_busid
, mp_bus_not_pci
);
127 mp_bus_id_to_pci_bus
[m
->mpc_busid
] = mp_current_pci_id
;
130 printk(KERN_ERR
"Unknown bustype %s\n", str
);
134 static int bad_ioapic(unsigned long address
)
136 if (nr_ioapics
>= MAX_IO_APICS
) {
137 printk(KERN_ERR
"ERROR: Max # of I/O APICs (%d) exceeded "
138 "(found %d)\n", MAX_IO_APICS
, nr_ioapics
);
139 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
142 printk(KERN_ERR
"WARNING: Bogus (zero) I/O APIC address"
143 " found in table, skipping!\n");
149 static void __init
MP_ioapic_info(struct mpc_config_ioapic
*m
)
151 if (!(m
->mpc_flags
& MPC_APIC_USABLE
))
154 printk(KERN_INFO
"I/O APIC #%d at 0x%X.\n", m
->mpc_apicid
,
157 if (bad_ioapic(m
->mpc_apicaddr
))
160 mp_ioapics
[nr_ioapics
] = *m
;
164 static void __init
MP_intsrc_info(struct mpc_config_intsrc
*m
)
166 mp_irqs
[mp_irq_entries
] = *m
;
167 Dprintk("Int: type %d, pol %d, trig %d, bus %d,"
168 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
169 m
->mpc_irqtype
, m
->mpc_irqflag
& 3,
170 (m
->mpc_irqflag
>> 2) & 3, m
->mpc_srcbus
,
171 m
->mpc_srcbusirq
, m
->mpc_dstapic
, m
->mpc_dstirq
);
172 if (++mp_irq_entries
>= MAX_IRQ_SOURCES
)
173 panic("Max # of irq sources exceeded!!\n");
176 static void __init
MP_lintsrc_info(struct mpc_config_lintsrc
*m
)
178 Dprintk("Lint: type %d, pol %d, trig %d, bus %d,"
179 " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
180 m
->mpc_irqtype
, m
->mpc_irqflag
& 3,
181 (m
->mpc_irqflag
>> 2) & 3, m
->mpc_srcbusid
,
182 m
->mpc_srcbusirq
, m
->mpc_destapic
, m
->mpc_destapiclint
);
188 static int __init
smp_read_mpc(struct mp_config_table
*mpc
, unsigned early
)
191 int count
= sizeof(*mpc
);
192 unsigned char *mpt
= ((unsigned char *)mpc
) + count
;
194 if (memcmp(mpc
->mpc_signature
, MPC_SIGNATURE
, 4)) {
195 printk(KERN_ERR
"MPTABLE: bad signature [%c%c%c%c]!\n",
196 mpc
->mpc_signature
[0],
197 mpc
->mpc_signature
[1],
198 mpc
->mpc_signature
[2], mpc
->mpc_signature
[3]);
201 if (mpf_checksum((unsigned char *)mpc
, mpc
->mpc_length
)) {
202 printk(KERN_ERR
"MPTABLE: checksum error!\n");
205 if (mpc
->mpc_spec
!= 0x01 && mpc
->mpc_spec
!= 0x04) {
206 printk(KERN_ERR
"MPTABLE: bad table version (%d)!!\n",
210 if (!mpc
->mpc_lapic
) {
211 printk(KERN_ERR
"MPTABLE: null local APIC address!\n");
214 memcpy(str
, mpc
->mpc_oem
, 8);
216 printk(KERN_INFO
"MPTABLE: OEM ID: %s ", str
);
218 memcpy(str
, mpc
->mpc_productid
, 12);
220 printk(KERN_INFO
"MPTABLE: Product ID: %s ", str
);
222 printk(KERN_INFO
"MPTABLE: APIC at: 0x%X\n", mpc
->mpc_lapic
);
224 /* save the local APIC address, it might be non-default */
226 mp_lapic_addr
= mpc
->mpc_lapic
;
232 * Now process the configuration blocks.
234 while (count
< mpc
->mpc_length
) {
238 struct mpc_config_processor
*m
=
239 (struct mpc_config_processor
*)mpt
;
241 MP_processor_info(m
);
248 struct mpc_config_bus
*m
=
249 (struct mpc_config_bus
*)mpt
;
257 struct mpc_config_ioapic
*m
=
258 (struct mpc_config_ioapic
*)mpt
;
266 struct mpc_config_intsrc
*m
=
267 (struct mpc_config_intsrc
*)mpt
;
276 struct mpc_config_lintsrc
*m
=
277 (struct mpc_config_lintsrc
*)mpt
;
285 setup_apic_routing();
287 printk(KERN_ERR
"MPTABLE: no processors registered!\n");
288 return num_processors
;
291 static int __init
ELCR_trigger(unsigned int irq
)
295 port
= 0x4d0 + (irq
>> 3);
296 return (inb(port
) >> (irq
& 7)) & 1;
299 static void __init
construct_default_ioirq_mptable(int mpc_default_type
)
301 struct mpc_config_intsrc intsrc
;
303 int ELCR_fallback
= 0;
305 intsrc
.mpc_type
= MP_INTSRC
;
306 intsrc
.mpc_irqflag
= 0; /* conforming */
307 intsrc
.mpc_srcbus
= 0;
308 intsrc
.mpc_dstapic
= mp_ioapics
[0].mpc_apicid
;
310 intsrc
.mpc_irqtype
= mp_INT
;
313 * If true, we have an ISA/PCI system with no IRQ entries
314 * in the MP table. To prevent the PCI interrupts from being set up
315 * incorrectly, we try to use the ELCR. The sanity check to see if
316 * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
317 * never be level sensitive, so we simply see if the ELCR agrees.
318 * If it does, we assume it's valid.
320 if (mpc_default_type
== 5) {
321 printk(KERN_INFO
"ISA/PCI bus type with no IRQ information... "
322 "falling back to ELCR\n");
324 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
326 printk(KERN_ERR
"ELCR contains invalid data... "
330 "Using ELCR to identify PCI interrupts\n");
335 for (i
= 0; i
< 16; i
++) {
336 switch (mpc_default_type
) {
338 if (i
== 0 || i
== 13)
339 continue; /* IRQ0 & IRQ13 not connected */
343 continue; /* IRQ2 is never connected */
348 * If the ELCR indicates a level-sensitive interrupt, we
349 * copy that information over to the MP table in the
350 * irqflag field (level sensitive, active high polarity).
353 intsrc
.mpc_irqflag
= 13;
355 intsrc
.mpc_irqflag
= 0;
358 intsrc
.mpc_srcbusirq
= i
;
359 intsrc
.mpc_dstirq
= i
? i
: 2; /* IRQ0 to INTIN2 */
360 MP_intsrc_info(&intsrc
);
363 intsrc
.mpc_irqtype
= mp_ExtINT
;
364 intsrc
.mpc_srcbusirq
= 0;
365 intsrc
.mpc_dstirq
= 0; /* 8259A to INTIN0 */
366 MP_intsrc_info(&intsrc
);
369 static inline void __init
construct_default_ISA_mptable(int mpc_default_type
)
371 struct mpc_config_processor processor
;
372 struct mpc_config_bus bus
;
373 struct mpc_config_ioapic ioapic
;
374 struct mpc_config_lintsrc lintsrc
;
375 int linttypes
[2] = { mp_ExtINT
, mp_NMI
};
379 * local APIC has default address
381 mp_lapic_addr
= APIC_DEFAULT_PHYS_BASE
;
384 * 2 CPUs, numbered 0 & 1.
386 processor
.mpc_type
= MP_PROCESSOR
;
387 processor
.mpc_apicver
= 0;
388 processor
.mpc_cpuflag
= CPU_ENABLED
;
389 processor
.mpc_cpufeature
= 0;
390 processor
.mpc_featureflag
= 0;
391 processor
.mpc_reserved
[0] = 0;
392 processor
.mpc_reserved
[1] = 0;
393 for (i
= 0; i
< 2; i
++) {
394 processor
.mpc_apicid
= i
;
395 MP_processor_info(&processor
);
398 bus
.mpc_type
= MP_BUS
;
400 switch (mpc_default_type
) {
402 printk(KERN_ERR
"???\nUnknown standard configuration %d\n",
407 memcpy(bus
.mpc_bustype
, "ISA ", 6);
411 if (mpc_default_type
> 4) {
413 memcpy(bus
.mpc_bustype
, "PCI ", 6);
417 ioapic
.mpc_type
= MP_IOAPIC
;
418 ioapic
.mpc_apicid
= 2;
419 ioapic
.mpc_apicver
= 0;
420 ioapic
.mpc_flags
= MPC_APIC_USABLE
;
421 ioapic
.mpc_apicaddr
= 0xFEC00000;
422 MP_ioapic_info(&ioapic
);
425 * We set up most of the low 16 IO-APIC pins according to MPS rules.
427 construct_default_ioirq_mptable(mpc_default_type
);
429 lintsrc
.mpc_type
= MP_LINTSRC
;
430 lintsrc
.mpc_irqflag
= 0; /* conforming */
431 lintsrc
.mpc_srcbusid
= 0;
432 lintsrc
.mpc_srcbusirq
= 0;
433 lintsrc
.mpc_destapic
= MP_APIC_ALL
;
434 for (i
= 0; i
< 2; i
++) {
435 lintsrc
.mpc_irqtype
= linttypes
[i
];
436 lintsrc
.mpc_destapiclint
= i
;
437 MP_lintsrc_info(&lintsrc
);
441 static struct intel_mp_floating
*mpf_found
;
444 * Scan the memory blocks for an SMP configuration block.
446 static void __init
__get_smp_config(unsigned early
)
448 struct intel_mp_floating
*mpf
= mpf_found
;
450 if (acpi_lapic
&& early
)
453 * ACPI supports both logical (e.g. Hyper-Threading) and physical
454 * processors, where MPS only supports physical.
456 if (acpi_lapic
&& acpi_ioapic
) {
457 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
460 } else if (acpi_lapic
)
461 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
462 "configuration information\n");
464 printk(KERN_INFO
"Intel MultiProcessor Specification v1.%d\n",
465 mpf
->mpf_specification
);
468 * Now see if we need to read further.
470 if (mpf
->mpf_feature1
!= 0) {
473 * local APIC has default address
475 mp_lapic_addr
= APIC_DEFAULT_PHYS_BASE
;
479 printk(KERN_INFO
"Default MP configuration #%d\n",
481 construct_default_ISA_mptable(mpf
->mpf_feature1
);
483 } else if (mpf
->mpf_physptr
) {
486 * Read the physical hardware table. Anything here will
487 * override the defaults.
489 if (!smp_read_mpc(phys_to_virt(mpf
->mpf_physptr
), early
)) {
490 smp_found_config
= 0;
492 "BIOS bug, MP table errors detected!...\n");
493 printk(KERN_ERR
"... disabling SMP support. "
494 "(tell your hw vendor)\n");
501 * If there are no explicit MP IRQ entries, then we are
502 * broken. We set up most of the low 16 IO-APIC pins to
503 * ISA defaults and hope it will work.
505 if (!mp_irq_entries
) {
506 struct mpc_config_bus bus
;
508 printk(KERN_ERR
"BIOS bug, no explicit IRQ entries, "
509 "using default mptable. "
510 "(tell your hw vendor)\n");
512 bus
.mpc_type
= MP_BUS
;
514 memcpy(bus
.mpc_bustype
, "ISA ", 6);
517 construct_default_ioirq_mptable(0);
524 printk(KERN_INFO
"Processors: %d\n", num_processors
);
526 * Only use the first configuration found.
530 void __init
early_get_smp_config(void)
535 void __init
get_smp_config(void)
540 static int __init
smp_scan_config(unsigned long base
, unsigned long length
,
543 extern void __bad_mpf_size(void);
544 unsigned int *bp
= phys_to_virt(base
);
545 struct intel_mp_floating
*mpf
;
547 Dprintk("Scan SMP from %p for %ld bytes.\n", bp
, length
);
548 if (sizeof(*mpf
) != 16)
552 mpf
= (struct intel_mp_floating
*)bp
;
553 if ((*bp
== SMP_MAGIC_IDENT
) &&
554 (mpf
->mpf_length
== 1) &&
555 !mpf_checksum((unsigned char *)bp
, 16) &&
556 ((mpf
->mpf_specification
== 1)
557 || (mpf
->mpf_specification
== 4))) {
559 smp_found_config
= 1;
565 reserve_bootmem_generic(virt_to_phys(mpf
), PAGE_SIZE
);
566 if (mpf
->mpf_physptr
)
567 reserve_bootmem_generic(mpf
->mpf_physptr
,
577 static void __init
__find_smp_config(unsigned reserve
)
579 unsigned int address
;
582 * FIXME: Linux assumes you have 640K of base ram..
583 * this continues the error...
585 * 1) Scan the bottom 1K for a signature
586 * 2) Scan the top 1K of base RAM
587 * 3) Scan the 64K of bios
589 if (smp_scan_config(0x0, 0x400, reserve
) ||
590 smp_scan_config(639 * 0x400, 0x400, reserve
) ||
591 smp_scan_config(0xF0000, 0x10000, reserve
))
594 * If it is an SMP machine we should know now.
596 * there is a real-mode segmented pointer pointing to the
597 * 4K EBDA area at 0x40E, calculate and scan it here.
599 * NOTE! There are Linux loaders that will corrupt the EBDA
600 * area, and as such this kind of SMP config may be less
601 * trustworthy, simply because the SMP table may have been
602 * stomped on during early boot. These loaders are buggy and
605 * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
608 address
= get_bios_ebda();
610 smp_scan_config(address
, 0x400, reserve
);
613 void __init
early_find_smp_config(void)
615 __find_smp_config(0);
618 void __init
find_smp_config(void)
620 __find_smp_config(1);
623 /* --------------------------------------------------------------------------
624 ACPI-based MP Configuration
625 -------------------------------------------------------------------------- */
629 void __init
mp_register_lapic_address(u64 address
)
631 mp_lapic_addr
= (unsigned long)address
;
632 set_fixmap_nocache(FIX_APIC_BASE
, mp_lapic_addr
);
633 if (boot_cpu_physical_apicid
== -1U)
634 boot_cpu_physical_apicid
= GET_APIC_ID(read_apic_id());
636 void __cpuinit
mp_register_lapic(int id
, u8 enabled
)
643 generic_processor_info(id
, 0);
648 #define MP_MAX_IOAPIC_PIN 127
650 static struct mp_ioapic_routing
{
654 u32 pin_programmed
[4];
655 } mp_ioapic_routing
[MAX_IO_APICS
];
657 static int mp_find_ioapic(int gsi
)
661 /* Find the IOAPIC that manages this GSI. */
662 for (i
= 0; i
< nr_ioapics
; i
++) {
663 if ((gsi
>= mp_ioapic_routing
[i
].gsi_base
)
664 && (gsi
<= mp_ioapic_routing
[i
].gsi_end
))
668 printk(KERN_ERR
"ERROR: Unable to locate IOAPIC for GSI %d\n", gsi
);
672 static u8
uniq_ioapic_id(u8 id
)
675 DECLARE_BITMAP(used
, 256);
676 bitmap_zero(used
, 256);
677 for (i
= 0; i
< nr_ioapics
; i
++) {
678 struct mpc_config_ioapic
*ia
= &mp_ioapics
[i
];
679 __set_bit(ia
->mpc_apicid
, used
);
681 if (!test_bit(id
, used
))
683 return find_first_zero_bit(used
, 256);
686 void __init
mp_register_ioapic(int id
, u32 address
, u32 gsi_base
)
690 if (bad_ioapic(address
))
695 mp_ioapics
[idx
].mpc_type
= MP_IOAPIC
;
696 mp_ioapics
[idx
].mpc_flags
= MPC_APIC_USABLE
;
697 mp_ioapics
[idx
].mpc_apicaddr
= address
;
699 set_fixmap_nocache(FIX_IO_APIC_BASE_0
+ idx
, address
);
700 mp_ioapics
[idx
].mpc_apicid
= uniq_ioapic_id(id
);
701 mp_ioapics
[idx
].mpc_apicver
= 0;
704 * Build basic IRQ lookup table to facilitate gsi->io_apic lookups
705 * and to prevent reprogramming of IOAPIC pins (PCI IRQs).
707 mp_ioapic_routing
[idx
].apic_id
= mp_ioapics
[idx
].mpc_apicid
;
708 mp_ioapic_routing
[idx
].gsi_base
= gsi_base
;
709 mp_ioapic_routing
[idx
].gsi_end
= gsi_base
+
710 io_apic_get_redir_entries(idx
);
712 printk(KERN_INFO
"IOAPIC[%d]: apic_id %d, address 0x%x, "
713 "GSI %d-%d\n", idx
, mp_ioapics
[idx
].mpc_apicid
,
714 mp_ioapics
[idx
].mpc_apicaddr
,
715 mp_ioapic_routing
[idx
].gsi_base
,
716 mp_ioapic_routing
[idx
].gsi_end
);
721 void __init
mp_override_legacy_irq(u8 bus_irq
, u8 polarity
, u8 trigger
, u32 gsi
)
723 struct mpc_config_intsrc intsrc
;
728 * Convert 'gsi' to 'ioapic.pin'.
730 ioapic
= mp_find_ioapic(gsi
);
733 pin
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
736 * TBD: This check is for faulty timer entries, where the override
737 * erroneously sets the trigger to level, resulting in a HUGE
738 * increase of timer interrupts!
740 if ((bus_irq
== 0) && (trigger
== 3))
743 intsrc
.mpc_type
= MP_INTSRC
;
744 intsrc
.mpc_irqtype
= mp_INT
;
745 intsrc
.mpc_irqflag
= (trigger
<< 2) | polarity
;
746 intsrc
.mpc_srcbus
= MP_ISA_BUS
;
747 intsrc
.mpc_srcbusirq
= bus_irq
; /* IRQ */
748 intsrc
.mpc_dstapic
= mp_ioapics
[ioapic
].mpc_apicid
; /* APIC ID */
749 intsrc
.mpc_dstirq
= pin
; /* INTIN# */
751 Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, %d-%d\n",
752 intsrc
.mpc_irqtype
, intsrc
.mpc_irqflag
& 3,
753 (intsrc
.mpc_irqflag
>> 2) & 3, intsrc
.mpc_srcbus
,
754 intsrc
.mpc_srcbusirq
, intsrc
.mpc_dstapic
, intsrc
.mpc_dstirq
);
756 mp_irqs
[mp_irq_entries
] = intsrc
;
757 if (++mp_irq_entries
== MAX_IRQ_SOURCES
)
758 panic("Max # of irq sources exceeded!\n");
761 void __init
mp_config_acpi_legacy_irqs(void)
763 struct mpc_config_intsrc intsrc
;
768 * Fabricate the legacy ISA bus (bus #31).
770 set_bit(MP_ISA_BUS
, mp_bus_not_pci
);
773 * Locate the IOAPIC that manages the ISA IRQs (0-15).
775 ioapic
= mp_find_ioapic(0);
779 intsrc
.mpc_type
= MP_INTSRC
;
780 intsrc
.mpc_irqflag
= 0; /* Conforming */
781 intsrc
.mpc_srcbus
= MP_ISA_BUS
;
782 intsrc
.mpc_dstapic
= mp_ioapics
[ioapic
].mpc_apicid
;
785 * Use the default configuration for the IRQs 0-15. Unless
786 * overridden by (MADT) interrupt source override entries.
788 for (i
= 0; i
< 16; i
++) {
791 for (idx
= 0; idx
< mp_irq_entries
; idx
++) {
792 struct mpc_config_intsrc
*irq
= mp_irqs
+ idx
;
794 /* Do we already have a mapping for this ISA IRQ? */
795 if (irq
->mpc_srcbus
== MP_ISA_BUS
796 && irq
->mpc_srcbusirq
== i
)
799 /* Do we already have a mapping for this IOAPIC pin */
800 if ((irq
->mpc_dstapic
== intsrc
.mpc_dstapic
) &&
801 (irq
->mpc_dstirq
== i
))
805 if (idx
!= mp_irq_entries
) {
806 printk(KERN_DEBUG
"ACPI: IRQ%d used by override.\n", i
);
807 continue; /* IRQ already used */
810 intsrc
.mpc_irqtype
= mp_INT
;
811 intsrc
.mpc_srcbusirq
= i
; /* Identity mapped */
812 intsrc
.mpc_dstirq
= i
;
814 Dprintk("Int: type %d, pol %d, trig %d, bus %d, irq %d, "
815 "%d-%d\n", intsrc
.mpc_irqtype
, intsrc
.mpc_irqflag
& 3,
816 (intsrc
.mpc_irqflag
>> 2) & 3, intsrc
.mpc_srcbus
,
817 intsrc
.mpc_srcbusirq
, intsrc
.mpc_dstapic
,
820 mp_irqs
[mp_irq_entries
] = intsrc
;
821 if (++mp_irq_entries
== MAX_IRQ_SOURCES
)
822 panic("Max # of irq sources exceeded!\n");
826 int mp_register_gsi(u32 gsi
, int triggering
, int polarity
)
832 if (acpi_irq_model
!= ACPI_IRQ_MODEL_IOAPIC
)
835 /* Don't set up the ACPI SCI because it's already set up */
836 if (acpi_gbl_FADT
.sci_interrupt
== gsi
)
839 ioapic
= mp_find_ioapic(gsi
);
841 printk(KERN_WARNING
"No IOAPIC for GSI %u\n", gsi
);
845 ioapic_pin
= gsi
- mp_ioapic_routing
[ioapic
].gsi_base
;
848 * Avoid pin reprogramming. PRTs typically include entries
849 * with redundant pin->gsi mappings (but unique PCI devices);
850 * we only program the IOAPIC on the first.
852 bit
= ioapic_pin
% 32;
853 idx
= (ioapic_pin
< 32) ? 0 : (ioapic_pin
/ 32);
855 printk(KERN_ERR
"Invalid reference to IOAPIC pin "
856 "%d-%d\n", mp_ioapic_routing
[ioapic
].apic_id
,
860 if ((1 << bit
) & mp_ioapic_routing
[ioapic
].pin_programmed
[idx
]) {
861 Dprintk(KERN_DEBUG
"Pin %d-%d already programmed\n",
862 mp_ioapic_routing
[ioapic
].apic_id
, ioapic_pin
);
866 mp_ioapic_routing
[ioapic
].pin_programmed
[idx
] |= (1 << bit
);
868 io_apic_set_pci_routing(ioapic
, ioapic_pin
, gsi
,
869 triggering
== ACPI_EDGE_SENSITIVE
? 0 : 1,
870 polarity
== ACPI_ACTIVE_HIGH
? 0 : 1);
873 #endif /* CONFIG_ACPI */