2 * acpi.c - Architecture-Specific Low-Level ACPI Support
4 * Copyright (C) 1999 VA Linux Systems
5 * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
6 * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Copyright (C) 2000 Intel Corp.
9 * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
10 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
11 * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
12 * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
13 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
14 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
16 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/smp.h>
40 #include <linux/string.h>
41 #include <linux/types.h>
42 #include <linux/irq.h>
43 #include <linux/acpi.h>
44 #include <linux/efi.h>
45 #include <linux/mmzone.h>
46 #include <linux/nodemask.h>
47 #include <linux/slab.h>
48 #include <acpi/processor.h>
50 #include <asm/iosapic.h>
51 #include <asm/machvec.h>
53 #include <asm/system.h>
56 #include <asm/cyclone.h>
57 #include <asm/xen/hypervisor.h>
59 #define BAD_MADT_ENTRY(entry, end) ( \
60 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
61 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
63 #define PREFIX "ACPI: "
66 unsigned int acpi_cpei_override
;
67 unsigned int acpi_cpei_phys_cpuid
;
69 unsigned long acpi_wakeup_address
= 0;
71 #ifdef CONFIG_IA64_GENERIC
72 static unsigned long __init
acpi_find_rsdp(void)
74 unsigned long rsdp_phys
= 0;
76 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
77 rsdp_phys
= efi
.acpi20
;
78 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
79 printk(KERN_WARNING PREFIX
80 "v1.0/r0.71 tables no longer supported\n");
85 acpi_get_sysname(void)
87 unsigned long rsdp_phys
;
88 struct acpi_table_rsdp
*rsdp
;
89 struct acpi_table_xsdt
*xsdt
;
90 struct acpi_table_header
*hdr
;
95 rsdp_phys
= acpi_find_rsdp();
98 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
102 rsdp
= (struct acpi_table_rsdp
*)__va(rsdp_phys
);
103 if (strncmp(rsdp
->signature
, ACPI_SIG_RSDP
, sizeof(ACPI_SIG_RSDP
) - 1)) {
105 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
109 xsdt
= (struct acpi_table_xsdt
*)__va(rsdp
->xsdt_physical_address
);
111 if (strncmp(hdr
->signature
, ACPI_SIG_XSDT
, sizeof(ACPI_SIG_XSDT
) - 1)) {
113 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
117 if (!strcmp(hdr
->oem_id
, "HP")) {
119 } else if (!strcmp(hdr
->oem_id
, "SGI")) {
120 if (!strcmp(hdr
->oem_table_id
+ 4, "UV"))
124 } else if (xen_pv_domain() && !strcmp(hdr
->oem_id
, "XEN")) {
129 /* Look for Intel IOMMU */
130 nentries
= (hdr
->length
- sizeof(*hdr
)) /
131 sizeof(xsdt
->table_offset_entry
[0]);
132 for (i
= 0; i
< nentries
; i
++) {
133 hdr
= __va(xsdt
->table_offset_entry
[i
]);
134 if (strncmp(hdr
->signature
, ACPI_SIG_DMAR
,
135 sizeof(ACPI_SIG_DMAR
) - 1) == 0)
142 #endif /* CONFIG_IA64_GENERIC */
144 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
146 /* Array to record platform interrupt vectors for generic interrupt routing. */
147 int platform_intr_list
[ACPI_MAX_PLATFORM_INTERRUPTS
] = {
148 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS
- 1] = -1
151 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_IOSAPIC
;
154 * Interrupt routing API for device drivers. Provides interrupt vector for
155 * a generic platform event. Currently only CPEI is implemented.
157 int acpi_request_vector(u32 int_type
)
161 if (int_type
< ACPI_MAX_PLATFORM_INTERRUPTS
) {
162 /* corrected platform error interrupt */
163 vector
= platform_intr_list
[int_type
];
166 "acpi_request_vector(): invalid interrupt type\n");
170 char *__init
__acpi_map_table(unsigned long phys_addr
, unsigned long size
)
172 return __va(phys_addr
);
175 void __init
__acpi_unmap_table(char *map
, unsigned long size
)
179 /* --------------------------------------------------------------------------
180 Boot-time Table Parsing
181 -------------------------------------------------------------------------- */
183 static int available_cpus __initdata
;
184 struct acpi_table_madt
*acpi_madt __initdata
;
188 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
189 const unsigned long end
)
191 struct acpi_madt_local_apic_override
*lapic
;
193 lapic
= (struct acpi_madt_local_apic_override
*)header
;
195 if (BAD_MADT_ENTRY(lapic
, end
))
198 if (lapic
->address
) {
199 iounmap(ipi_base_addr
);
200 ipi_base_addr
= ioremap(lapic
->address
, 0);
206 acpi_parse_lsapic(struct acpi_subtable_header
* header
, const unsigned long end
)
208 struct acpi_madt_local_sapic
*lsapic
;
210 lsapic
= (struct acpi_madt_local_sapic
*)header
;
212 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
214 if (lsapic
->lapic_flags
& ACPI_MADT_ENABLED
) {
216 smp_boot_data
.cpu_phys_id
[available_cpus
] =
217 (lsapic
->id
<< 8) | lsapic
->eid
;
227 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
229 struct acpi_madt_local_apic_nmi
*lacpi_nmi
;
231 lacpi_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
233 if (BAD_MADT_ENTRY(lacpi_nmi
, end
))
236 /* TBD: Support lapic_nmi entries */
241 acpi_parse_iosapic(struct acpi_subtable_header
* header
, const unsigned long end
)
243 struct acpi_madt_io_sapic
*iosapic
;
245 iosapic
= (struct acpi_madt_io_sapic
*)header
;
247 if (BAD_MADT_ENTRY(iosapic
, end
))
250 return iosapic_init(iosapic
->address
, iosapic
->global_irq_base
);
253 static unsigned int __initdata acpi_madt_rev
;
256 acpi_parse_plat_int_src(struct acpi_subtable_header
* header
,
257 const unsigned long end
)
259 struct acpi_madt_interrupt_source
*plintsrc
;
262 plintsrc
= (struct acpi_madt_interrupt_source
*)header
;
264 if (BAD_MADT_ENTRY(plintsrc
, end
))
268 * Get vector assignment for this interrupt, set attributes,
269 * and program the IOSAPIC routing table.
271 vector
= iosapic_register_platform_intr(plintsrc
->type
,
272 plintsrc
->global_irq
,
273 plintsrc
->io_sapic_vector
,
276 ((plintsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
) ==
277 ACPI_MADT_POLARITY_ACTIVE_HIGH
) ?
278 IOSAPIC_POL_HIGH
: IOSAPIC_POL_LOW
,
279 ((plintsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) ==
280 ACPI_MADT_TRIGGER_EDGE
) ?
281 IOSAPIC_EDGE
: IOSAPIC_LEVEL
);
283 platform_intr_list
[plintsrc
->type
] = vector
;
284 if (acpi_madt_rev
> 1) {
285 acpi_cpei_override
= plintsrc
->flags
& ACPI_MADT_CPEI_OVERRIDE
;
289 * Save the physical id, so we can check when its being removed
291 acpi_cpei_phys_cpuid
= ((plintsrc
->id
<< 8) | (plintsrc
->eid
)) & 0xffff;
296 #ifdef CONFIG_HOTPLUG_CPU
297 unsigned int can_cpei_retarget(void)
299 extern int cpe_vector
;
300 extern unsigned int force_cpei_retarget
;
303 * Only if CPEI is supported and the override flag
304 * is present, otherwise return that its re-targettable
305 * if we are in polling mode.
307 if (cpe_vector
> 0) {
308 if (acpi_cpei_override
|| force_cpei_retarget
)
316 unsigned int is_cpu_cpei_target(unsigned int cpu
)
318 unsigned int logical_id
;
320 logical_id
= cpu_logical_id(acpi_cpei_phys_cpuid
);
322 if (logical_id
== cpu
)
328 void set_cpei_target_cpu(unsigned int cpu
)
330 acpi_cpei_phys_cpuid
= cpu_physical_id(cpu
);
334 unsigned int get_cpei_target_cpu(void)
336 return acpi_cpei_phys_cpuid
;
340 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
341 const unsigned long end
)
343 struct acpi_madt_interrupt_override
*p
;
345 p
= (struct acpi_madt_interrupt_override
*)header
;
347 if (BAD_MADT_ENTRY(p
, end
))
350 iosapic_override_isa_irq(p
->source_irq
, p
->global_irq
,
351 ((p
->inti_flags
& ACPI_MADT_POLARITY_MASK
) ==
352 ACPI_MADT_POLARITY_ACTIVE_HIGH
) ?
353 IOSAPIC_POL_HIGH
: IOSAPIC_POL_LOW
,
354 ((p
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) ==
355 ACPI_MADT_TRIGGER_EDGE
) ?
356 IOSAPIC_EDGE
: IOSAPIC_LEVEL
);
361 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
363 struct acpi_madt_nmi_source
*nmi_src
;
365 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
367 if (BAD_MADT_ENTRY(nmi_src
, end
))
370 /* TBD: Support nimsrc entries */
374 static void __init
acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
376 if (!strncmp(oem_id
, "IBM", 3) && (!strncmp(oem_table_id
, "SERMOW", 6))) {
379 * Unfortunately ITC_DRIFT is not yet part of the
380 * official SAL spec, so the ITC_DRIFT bit is not
381 * set by the BIOS on this hardware.
383 sal_platform_features
|= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT
;
389 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
394 acpi_madt
= (struct acpi_table_madt
*)table
;
396 acpi_madt_rev
= acpi_madt
->header
.revision
;
398 /* remember the value for reference after free_initmem() */
399 #ifdef CONFIG_ITANIUM
400 has_8259
= 1; /* Firmware on old Itanium systems is broken */
402 has_8259
= acpi_madt
->flags
& ACPI_MADT_PCAT_COMPAT
;
404 iosapic_system_init(has_8259
);
406 /* Get base address of IPI Message Block */
408 if (acpi_madt
->address
)
409 ipi_base_addr
= ioremap(acpi_madt
->address
, 0);
411 printk(KERN_INFO PREFIX
"Local APIC address %p\n", ipi_base_addr
);
413 acpi_madt_oem_check(acpi_madt
->header
.oem_id
,
414 acpi_madt
->header
.oem_table_id
);
419 #ifdef CONFIG_ACPI_NUMA
423 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
425 static int __initdata srat_num_cpus
; /* number of cpus */
426 static u32 __devinitdata pxm_flag
[PXM_FLAG_LEN
];
427 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
428 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
429 static struct acpi_table_slit __initdata
*slit_table
;
430 cpumask_t early_cpu_possible_map
= CPU_MASK_NONE
;
432 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity
*pa
)
436 pxm
= pa
->proximity_domain_lo
;
437 if (ia64_platform_is("sn2"))
438 pxm
+= pa
->proximity_domain_hi
[0] << 8;
442 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity
*ma
)
446 pxm
= ma
->proximity_domain
;
447 if (!ia64_platform_is("sn2"))
454 * ACPI 2.0 SLIT (System Locality Information Table)
455 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
457 void __init
acpi_numa_slit_init(struct acpi_table_slit
*slit
)
461 len
= sizeof(struct acpi_table_header
) + 8
462 + slit
->locality_count
* slit
->locality_count
;
463 if (slit
->header
.length
!= len
) {
465 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
466 len
, slit
->header
.length
);
473 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity
*pa
)
477 if (!(pa
->flags
& ACPI_SRAT_CPU_ENABLED
))
480 pxm
= get_processor_proximity_domain(pa
);
482 /* record this node in proximity bitmap */
485 node_cpuid
[srat_num_cpus
].phys_id
=
486 (pa
->apic_id
<< 8) | (pa
->local_sapic_eid
);
487 /* nid should be overridden as logical node id later */
488 node_cpuid
[srat_num_cpus
].nid
= pxm
;
489 cpu_set(srat_num_cpus
, early_cpu_possible_map
);
494 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity
*ma
)
496 unsigned long paddr
, size
;
498 struct node_memblk_s
*p
, *q
, *pend
;
500 pxm
= get_memory_proximity_domain(ma
);
502 /* fill node memory chunk structure */
503 paddr
= ma
->base_address
;
506 /* Ignore disabled entries */
507 if (!(ma
->flags
& ACPI_SRAT_MEM_ENABLED
))
510 /* record this node in proximity bitmap */
513 /* Insertion sort based on base address */
514 pend
= &node_memblk
[num_node_memblks
];
515 for (p
= &node_memblk
[0]; p
< pend
; p
++) {
516 if (paddr
< p
->start_paddr
)
520 for (q
= pend
- 1; q
>= p
; q
--)
523 p
->start_paddr
= paddr
;
529 void __init
acpi_numa_arch_fixup(void)
531 int i
, j
, node_from
, node_to
;
533 /* If there's no SRAT, fix the phys_id and mark node 0 online */
534 if (srat_num_cpus
== 0) {
536 node_cpuid
[0].phys_id
= hard_smp_processor_id();
541 * MCD - This can probably be dropped now. No need for pxm ID to node ID
542 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
544 nodes_clear(node_online_map
);
545 for (i
= 0; i
< MAX_PXM_DOMAINS
; i
++) {
546 if (pxm_bit_test(i
)) {
547 int nid
= acpi_map_pxm_to_node(i
);
548 node_set_online(nid
);
552 /* set logical node id in memory chunk structure */
553 for (i
= 0; i
< num_node_memblks
; i
++)
554 node_memblk
[i
].nid
= pxm_to_node(node_memblk
[i
].nid
);
556 /* assign memory bank numbers for each chunk on each node */
557 for_each_online_node(i
) {
561 for (j
= 0; j
< num_node_memblks
; j
++)
562 if (node_memblk
[j
].nid
== i
)
563 node_memblk
[j
].bank
= bank
++;
566 /* set logical node id in cpu structure */
567 for_each_possible_early_cpu(i
)
568 node_cpuid
[i
].nid
= pxm_to_node(node_cpuid
[i
].nid
);
570 printk(KERN_INFO
"Number of logical nodes in system = %d\n",
572 printk(KERN_INFO
"Number of memory chunks in system = %d\n",
576 for (i
= 0; i
< MAX_NUMNODES
; i
++)
577 for (j
= 0; j
< MAX_NUMNODES
; j
++)
578 node_distance(i
, j
) = i
== j
? LOCAL_DISTANCE
:
583 memset(numa_slit
, -1, sizeof(numa_slit
));
584 for (i
= 0; i
< slit_table
->locality_count
; i
++) {
585 if (!pxm_bit_test(i
))
587 node_from
= pxm_to_node(i
);
588 for (j
= 0; j
< slit_table
->locality_count
; j
++) {
589 if (!pxm_bit_test(j
))
591 node_to
= pxm_to_node(j
);
592 node_distance(node_from
, node_to
) =
593 slit_table
->entry
[i
* slit_table
->locality_count
+ j
];
598 printk("ACPI 2.0 SLIT locality table:\n");
599 for_each_online_node(i
) {
600 for_each_online_node(j
)
601 printk("%03d ", node_distance(i
, j
));
606 #endif /* CONFIG_ACPI_NUMA */
609 * success: return IRQ number (>=0)
610 * failure: return < 0
612 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int triggering
, int polarity
)
614 if (acpi_irq_model
== ACPI_IRQ_MODEL_PLATFORM
)
617 if (has_8259
&& gsi
< 16)
618 return isa_irq_to_vector(gsi
);
620 return iosapic_register_intr(gsi
,
622 ACPI_ACTIVE_HIGH
) ? IOSAPIC_POL_HIGH
:
625 ACPI_EDGE_SENSITIVE
) ? IOSAPIC_EDGE
:
629 void acpi_unregister_gsi(u32 gsi
)
631 if (acpi_irq_model
== ACPI_IRQ_MODEL_PLATFORM
)
634 if (has_8259
&& gsi
< 16)
637 iosapic_unregister_intr(gsi
);
640 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
642 struct acpi_table_header
*fadt_header
;
643 struct acpi_table_fadt
*fadt
;
648 fadt_header
= (struct acpi_table_header
*)table
;
649 if (fadt_header
->revision
!= 3)
650 return -ENODEV
; /* Only deal with ACPI 2.0 FADT */
652 fadt
= (struct acpi_table_fadt
*)fadt_header
;
654 acpi_register_gsi(NULL
, fadt
->sci_interrupt
, ACPI_LEVEL_SENSITIVE
,
659 int __init
early_acpi_boot_init(void)
664 * do a partial walk of MADT to determine how many CPUs
665 * we have including offline CPUs
667 if (acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
668 printk(KERN_ERR PREFIX
"Can't find MADT\n");
672 ret
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
673 acpi_parse_lsapic
, NR_CPUS
);
675 printk(KERN_ERR PREFIX
676 "Error parsing MADT - no LAPIC entries\n");
679 if (available_cpus
== 0) {
680 printk(KERN_INFO
"ACPI: Found 0 CPUS; assuming 1\n");
681 printk(KERN_INFO
"CPU 0 (0x%04x)", hard_smp_processor_id());
682 smp_boot_data
.cpu_phys_id
[available_cpus
] =
683 hard_smp_processor_id();
684 available_cpus
= 1; /* We've got at least one of these, no? */
686 smp_boot_data
.cpu_count
= available_cpus
;
688 /* Make boot-up look pretty */
689 printk(KERN_INFO
"%d CPUs available, %d CPUs total\n", available_cpus
,
695 int __init
acpi_boot_init(void)
701 * Parse the Multiple APIC Description Table (MADT), if exists.
702 * Note that this table provides platform SMP configuration
703 * information -- the successor to MPS tables.
706 if (acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
707 printk(KERN_ERR PREFIX
"Can't find MADT\n");
713 if (acpi_table_parse_madt
714 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
, acpi_parse_lapic_addr_ovr
, 0) < 0)
715 printk(KERN_ERR PREFIX
716 "Error parsing LAPIC address override entry\n");
718 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0)
720 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
724 if (acpi_table_parse_madt
725 (ACPI_MADT_TYPE_IO_SAPIC
, acpi_parse_iosapic
, NR_IOSAPICS
) < 1) {
726 if (!ia64_platform_is("sn2"))
727 printk(KERN_ERR PREFIX
728 "Error parsing MADT - no IOSAPIC entries\n");
731 /* System-Level Interrupt Routing */
733 if (acpi_table_parse_madt
734 (ACPI_MADT_TYPE_INTERRUPT_SOURCE
, acpi_parse_plat_int_src
,
735 ACPI_MAX_PLATFORM_INTERRUPTS
) < 0)
736 printk(KERN_ERR PREFIX
737 "Error parsing platform interrupt source entry\n");
739 if (acpi_table_parse_madt
740 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
, 0) < 0)
741 printk(KERN_ERR PREFIX
742 "Error parsing interrupt source overrides entry\n");
744 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
, 0) < 0)
745 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
749 * FADT says whether a legacy keyboard controller is present.
750 * The FADT also contains an SCI_INT line, by which the system
751 * gets interrupts such as power and sleep buttons. If it's not
752 * on a Legacy interrupt, it needs to be setup.
754 if (acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
))
755 printk(KERN_ERR PREFIX
"Can't find FADT\n");
757 #ifdef CONFIG_ACPI_NUMA
759 if (srat_num_cpus
== 0) {
761 for (cpu
= 0; cpu
< smp_boot_data
.cpu_count
; cpu
++)
762 if (smp_boot_data
.cpu_phys_id
[cpu
] !=
763 hard_smp_processor_id())
764 node_cpuid
[i
++].phys_id
=
765 smp_boot_data
.cpu_phys_id
[cpu
];
768 build_cpu_to_node_map();
773 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
777 if (has_8259
&& gsi
< 16)
778 *irq
= isa_irq_to_vector(gsi
);
780 tmp
= gsi_to_irq(gsi
);
788 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
797 * ACPI based hotplug CPU support
799 #ifdef CONFIG_ACPI_HOTPLUG_CPU
801 int acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
803 #ifdef CONFIG_ACPI_NUMA
807 pxm_id
= acpi_get_pxm(handle
);
809 * We don't have cpu-only-node hotadd. But if the system equips
810 * SRAT table, pxm is already found and node is ready.
811 * So, just pxm_to_nid(pxm) is OK.
812 * This code here is for the system which doesn't have full SRAT
813 * table for possible cpus.
815 nid
= acpi_map_pxm_to_node(pxm_id
);
816 node_cpuid
[cpu
].phys_id
= physid
;
817 node_cpuid
[cpu
].nid
= nid
;
822 int additional_cpus __initdata
= -1;
824 static __init
int setup_additional_cpus(char *s
)
827 additional_cpus
= simple_strtol(s
, NULL
, 0);
832 early_param("additional_cpus", setup_additional_cpus
);
835 * cpu_possible_map should be static, it cannot change as CPUs
836 * are onlined, or offlined. The reason is per-cpu data-structures
837 * are allocated by some modules at init time, and dont expect to
838 * do this dynamically on cpu arrival/departure.
839 * cpu_present_map on the other hand can change dynamically.
840 * In case when cpu_hotplug is not compiled, then we resort to current
841 * behaviour, which is cpu_possible == cpu_present.
844 * Three ways to find out the number of additional hotplug CPUs:
845 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
846 * - The user can overwrite it with additional_cpus=NUM
847 * - Otherwise don't reserve additional CPUs.
849 __init
void prefill_possible_map(void)
852 int possible
, disabled_cpus
;
854 disabled_cpus
= total_cpus
- available_cpus
;
856 if (additional_cpus
== -1) {
857 if (disabled_cpus
> 0)
858 additional_cpus
= disabled_cpus
;
863 possible
= available_cpus
+ additional_cpus
;
865 if (possible
> nr_cpu_ids
)
866 possible
= nr_cpu_ids
;
868 printk(KERN_INFO
"SMP: Allowing %d CPUs, %d hotplug CPUs\n",
869 possible
, max((possible
- available_cpus
), 0));
871 for (i
= 0; i
< possible
; i
++)
872 set_cpu_possible(i
, true);
875 int acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
877 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
878 union acpi_object
*obj
;
879 struct acpi_madt_local_sapic
*lsapic
;
883 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
886 if (!buffer
.length
|| !buffer
.pointer
)
889 obj
= buffer
.pointer
;
890 if (obj
->type
!= ACPI_TYPE_BUFFER
)
892 kfree(buffer
.pointer
);
896 lsapic
= (struct acpi_madt_local_sapic
*)obj
->buffer
.pointer
;
898 if ((lsapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_SAPIC
) ||
899 (!(lsapic
->lapic_flags
& ACPI_MADT_ENABLED
))) {
900 kfree(buffer
.pointer
);
904 physid
= ((lsapic
->id
<< 8) | (lsapic
->eid
));
906 kfree(buffer
.pointer
);
907 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
908 buffer
.pointer
= NULL
;
910 cpumask_complement(&tmp_map
, cpu_present_mask
);
911 cpu
= cpumask_first(&tmp_map
);
912 if (cpu
>= nr_cpu_ids
)
915 acpi_map_cpu2node(handle
, cpu
, physid
);
917 cpu_set(cpu
, cpu_present_map
);
918 ia64_cpu_to_sapicid
[cpu
] = physid
;
920 acpi_processor_set_pdc(handle
);
926 EXPORT_SYMBOL(acpi_map_lsapic
);
928 int acpi_unmap_lsapic(int cpu
)
930 ia64_cpu_to_sapicid
[cpu
] = -1;
931 cpu_clear(cpu
, cpu_present_map
);
933 #ifdef CONFIG_ACPI_NUMA
934 /* NUMA specific cleanup's */
940 EXPORT_SYMBOL(acpi_unmap_lsapic
);
941 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
943 #ifdef CONFIG_ACPI_NUMA
944 static acpi_status __devinit
945 acpi_map_iosapic(acpi_handle handle
, u32 depth
, void *context
, void **ret
)
947 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
948 union acpi_object
*obj
;
949 struct acpi_madt_io_sapic
*iosapic
;
950 unsigned int gsi_base
;
953 /* Only care about objects w/ a method that returns the MADT */
954 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
957 if (!buffer
.length
|| !buffer
.pointer
)
960 obj
= buffer
.pointer
;
961 if (obj
->type
!= ACPI_TYPE_BUFFER
||
962 obj
->buffer
.length
< sizeof(*iosapic
)) {
963 kfree(buffer
.pointer
);
967 iosapic
= (struct acpi_madt_io_sapic
*)obj
->buffer
.pointer
;
969 if (iosapic
->header
.type
!= ACPI_MADT_TYPE_IO_SAPIC
) {
970 kfree(buffer
.pointer
);
974 gsi_base
= iosapic
->global_irq_base
;
976 kfree(buffer
.pointer
);
979 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
980 * us which node to associate this with.
982 pxm
= acpi_get_pxm(handle
);
986 node
= pxm_to_node(pxm
);
988 if (node
>= MAX_NUMNODES
|| !node_online(node
) ||
989 cpumask_empty(cpumask_of_node(node
)))
992 /* We know a gsi to node mapping! */
993 map_iosapic_to_node(gsi_base
, node
);
998 acpi_map_iosapics (void)
1000 acpi_get_devices(NULL
, acpi_map_iosapic
, NULL
, NULL
);
1004 fs_initcall(acpi_map_iosapics
);
1005 #endif /* CONFIG_ACPI_NUMA */
1007 int __ref
acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
1011 if ((err
= iosapic_init(phys_addr
, gsi_base
)))
1014 #ifdef CONFIG_ACPI_NUMA
1015 acpi_map_iosapic(handle
, 0, NULL
, NULL
);
1016 #endif /* CONFIG_ACPI_NUMA */
1021 EXPORT_SYMBOL(acpi_register_ioapic
);
1023 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
1025 return iosapic_remove(gsi_base
);
1028 EXPORT_SYMBOL(acpi_unregister_ioapic
);
1031 * acpi_save_state_mem() - save kernel state
1033 * TBD when when IA64 starts to support suspend...
1035 int acpi_save_state_mem(void) { return 0; }
1038 * acpi_restore_state()
1040 void acpi_restore_state_mem(void) {}
1043 * do_suspend_lowlevel()
1045 void do_suspend_lowlevel(void) {}