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>
55 #include <asm/cyclone.h>
57 #define PREFIX "ACPI: "
60 unsigned int acpi_cpei_override
;
61 unsigned int acpi_cpei_phys_cpuid
;
63 unsigned long acpi_wakeup_address
= 0;
65 #ifdef CONFIG_IA64_GENERIC
66 static unsigned long __init
acpi_find_rsdp(void)
68 unsigned long rsdp_phys
= 0;
70 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
71 rsdp_phys
= efi
.acpi20
;
72 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
73 printk(KERN_WARNING PREFIX
74 "v1.0/r0.71 tables no longer supported\n");
79 acpi_get_sysname(void)
81 unsigned long rsdp_phys
;
82 struct acpi_table_rsdp
*rsdp
;
83 struct acpi_table_xsdt
*xsdt
;
84 struct acpi_table_header
*hdr
;
85 #ifdef CONFIG_INTEL_IOMMU
89 rsdp_phys
= acpi_find_rsdp();
92 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
96 rsdp
= (struct acpi_table_rsdp
*)__va(rsdp_phys
);
97 if (strncmp(rsdp
->signature
, ACPI_SIG_RSDP
, sizeof(ACPI_SIG_RSDP
) - 1)) {
99 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
103 xsdt
= (struct acpi_table_xsdt
*)__va(rsdp
->xsdt_physical_address
);
105 if (strncmp(hdr
->signature
, ACPI_SIG_XSDT
, sizeof(ACPI_SIG_XSDT
) - 1)) {
107 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
111 if (!strcmp(hdr
->oem_id
, "HP")) {
113 } else if (!strcmp(hdr
->oem_id
, "SGI")) {
114 if (!strcmp(hdr
->oem_table_id
+ 4, "UV"))
120 #ifdef CONFIG_INTEL_IOMMU
121 /* Look for Intel IOMMU */
122 nentries
= (hdr
->length
- sizeof(*hdr
)) /
123 sizeof(xsdt
->table_offset_entry
[0]);
124 for (i
= 0; i
< nentries
; i
++) {
125 hdr
= __va(xsdt
->table_offset_entry
[i
]);
126 if (strncmp(hdr
->signature
, ACPI_SIG_DMAR
,
127 sizeof(ACPI_SIG_DMAR
) - 1) == 0)
134 #endif /* CONFIG_IA64_GENERIC */
136 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
138 /* Array to record platform interrupt vectors for generic interrupt routing. */
139 int platform_intr_list
[ACPI_MAX_PLATFORM_INTERRUPTS
] = {
140 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS
- 1] = -1
143 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_IOSAPIC
;
146 * Interrupt routing API for device drivers. Provides interrupt vector for
147 * a generic platform event. Currently only CPEI is implemented.
149 int acpi_request_vector(u32 int_type
)
153 if (int_type
< ACPI_MAX_PLATFORM_INTERRUPTS
) {
154 /* corrected platform error interrupt */
155 vector
= platform_intr_list
[int_type
];
158 "acpi_request_vector(): invalid interrupt type\n");
162 void __init __iomem
*__acpi_map_table(unsigned long phys
, unsigned long size
)
167 void __init
__acpi_unmap_table(void __iomem
*map
, unsigned long size
)
171 /* --------------------------------------------------------------------------
172 Boot-time Table Parsing
173 -------------------------------------------------------------------------- */
175 static int available_cpus __initdata
;
176 struct acpi_table_madt
*acpi_madt __initdata
;
180 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
181 const unsigned long end
)
183 struct acpi_madt_local_apic_override
*lapic
;
185 lapic
= (struct acpi_madt_local_apic_override
*)header
;
187 if (BAD_MADT_ENTRY(lapic
, end
))
190 if (lapic
->address
) {
191 iounmap(ipi_base_addr
);
192 ipi_base_addr
= ioremap(lapic
->address
, 0);
198 acpi_parse_lsapic(struct acpi_subtable_header
* header
, const unsigned long end
)
200 struct acpi_madt_local_sapic
*lsapic
;
202 lsapic
= (struct acpi_madt_local_sapic
*)header
;
204 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
206 if (lsapic
->lapic_flags
& ACPI_MADT_ENABLED
) {
208 smp_boot_data
.cpu_phys_id
[available_cpus
] =
209 (lsapic
->id
<< 8) | lsapic
->eid
;
219 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
221 struct acpi_madt_local_apic_nmi
*lacpi_nmi
;
223 lacpi_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
225 if (BAD_MADT_ENTRY(lacpi_nmi
, end
))
228 /* TBD: Support lapic_nmi entries */
233 acpi_parse_iosapic(struct acpi_subtable_header
* header
, const unsigned long end
)
235 struct acpi_madt_io_sapic
*iosapic
;
237 iosapic
= (struct acpi_madt_io_sapic
*)header
;
239 if (BAD_MADT_ENTRY(iosapic
, end
))
242 return iosapic_init(iosapic
->address
, iosapic
->global_irq_base
);
245 static unsigned int __initdata acpi_madt_rev
;
248 acpi_parse_plat_int_src(struct acpi_subtable_header
* header
,
249 const unsigned long end
)
251 struct acpi_madt_interrupt_source
*plintsrc
;
254 plintsrc
= (struct acpi_madt_interrupt_source
*)header
;
256 if (BAD_MADT_ENTRY(plintsrc
, end
))
260 * Get vector assignment for this interrupt, set attributes,
261 * and program the IOSAPIC routing table.
263 vector
= iosapic_register_platform_intr(plintsrc
->type
,
264 plintsrc
->global_irq
,
265 plintsrc
->io_sapic_vector
,
268 ((plintsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
) ==
269 ACPI_MADT_POLARITY_ACTIVE_HIGH
) ?
270 IOSAPIC_POL_HIGH
: IOSAPIC_POL_LOW
,
271 ((plintsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) ==
272 ACPI_MADT_TRIGGER_EDGE
) ?
273 IOSAPIC_EDGE
: IOSAPIC_LEVEL
);
275 platform_intr_list
[plintsrc
->type
] = vector
;
276 if (acpi_madt_rev
> 1) {
277 acpi_cpei_override
= plintsrc
->flags
& ACPI_MADT_CPEI_OVERRIDE
;
281 * Save the physical id, so we can check when its being removed
283 acpi_cpei_phys_cpuid
= ((plintsrc
->id
<< 8) | (plintsrc
->eid
)) & 0xffff;
288 #ifdef CONFIG_HOTPLUG_CPU
289 unsigned int can_cpei_retarget(void)
291 extern int cpe_vector
;
292 extern unsigned int force_cpei_retarget
;
295 * Only if CPEI is supported and the override flag
296 * is present, otherwise return that its re-targettable
297 * if we are in polling mode.
299 if (cpe_vector
> 0) {
300 if (acpi_cpei_override
|| force_cpei_retarget
)
308 unsigned int is_cpu_cpei_target(unsigned int cpu
)
310 unsigned int logical_id
;
312 logical_id
= cpu_logical_id(acpi_cpei_phys_cpuid
);
314 if (logical_id
== cpu
)
320 void set_cpei_target_cpu(unsigned int cpu
)
322 acpi_cpei_phys_cpuid
= cpu_physical_id(cpu
);
326 unsigned int get_cpei_target_cpu(void)
328 return acpi_cpei_phys_cpuid
;
332 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
333 const unsigned long end
)
335 struct acpi_madt_interrupt_override
*p
;
337 p
= (struct acpi_madt_interrupt_override
*)header
;
339 if (BAD_MADT_ENTRY(p
, end
))
342 iosapic_override_isa_irq(p
->source_irq
, p
->global_irq
,
343 ((p
->inti_flags
& ACPI_MADT_POLARITY_MASK
) ==
344 ACPI_MADT_POLARITY_ACTIVE_LOW
) ?
345 IOSAPIC_POL_LOW
: IOSAPIC_POL_HIGH
,
346 ((p
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) ==
347 ACPI_MADT_TRIGGER_LEVEL
) ?
348 IOSAPIC_LEVEL
: IOSAPIC_EDGE
);
353 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
355 struct acpi_madt_nmi_source
*nmi_src
;
357 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
359 if (BAD_MADT_ENTRY(nmi_src
, end
))
362 /* TBD: Support nimsrc entries */
366 static void __init
acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
368 if (!strncmp(oem_id
, "IBM", 3) && (!strncmp(oem_table_id
, "SERMOW", 6))) {
371 * Unfortunately ITC_DRIFT is not yet part of the
372 * official SAL spec, so the ITC_DRIFT bit is not
373 * set by the BIOS on this hardware.
375 sal_platform_features
|= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT
;
381 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
383 acpi_madt
= (struct acpi_table_madt
*)table
;
385 acpi_madt_rev
= acpi_madt
->header
.revision
;
387 /* remember the value for reference after free_initmem() */
388 #ifdef CONFIG_ITANIUM
389 has_8259
= 1; /* Firmware on old Itanium systems is broken */
391 has_8259
= acpi_madt
->flags
& ACPI_MADT_PCAT_COMPAT
;
393 iosapic_system_init(has_8259
);
395 /* Get base address of IPI Message Block */
397 if (acpi_madt
->address
)
398 ipi_base_addr
= ioremap(acpi_madt
->address
, 0);
400 printk(KERN_INFO PREFIX
"Local APIC address %p\n", ipi_base_addr
);
402 acpi_madt_oem_check(acpi_madt
->header
.oem_id
,
403 acpi_madt
->header
.oem_table_id
);
408 #ifdef CONFIG_ACPI_NUMA
412 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
414 static int __initdata srat_num_cpus
; /* number of cpus */
415 static u32 pxm_flag
[PXM_FLAG_LEN
];
416 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
417 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
418 static struct acpi_table_slit __initdata
*slit_table
;
419 cpumask_t early_cpu_possible_map
= CPU_MASK_NONE
;
422 get_processor_proximity_domain(struct acpi_srat_cpu_affinity
*pa
)
426 pxm
= pa
->proximity_domain_lo
;
427 if (ia64_platform_is("sn2") || acpi_srat_revision
>= 2)
428 pxm
+= pa
->proximity_domain_hi
[0] << 8;
433 get_memory_proximity_domain(struct acpi_srat_mem_affinity
*ma
)
437 pxm
= ma
->proximity_domain
;
438 if (!ia64_platform_is("sn2") && acpi_srat_revision
<= 1)
445 * ACPI 2.0 SLIT (System Locality Information Table)
446 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
448 void __init
acpi_numa_slit_init(struct acpi_table_slit
*slit
)
452 len
= sizeof(struct acpi_table_header
) + 8
453 + slit
->locality_count
* slit
->locality_count
;
454 if (slit
->header
.length
!= len
) {
456 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
457 len
, slit
->header
.length
);
464 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity
*pa
)
468 if (!(pa
->flags
& ACPI_SRAT_CPU_ENABLED
))
471 if (srat_num_cpus
>= ARRAY_SIZE(node_cpuid
)) {
472 printk_once(KERN_WARNING
473 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
474 ARRAY_SIZE(node_cpuid
));
477 pxm
= get_processor_proximity_domain(pa
);
479 /* record this node in proximity bitmap */
482 node_cpuid
[srat_num_cpus
].phys_id
=
483 (pa
->apic_id
<< 8) | (pa
->local_sapic_eid
);
484 /* nid should be overridden as logical node id later */
485 node_cpuid
[srat_num_cpus
].nid
= pxm
;
486 cpumask_set_cpu(srat_num_cpus
, &early_cpu_possible_map
);
491 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity
*ma
)
493 unsigned long paddr
, size
;
495 struct node_memblk_s
*p
, *q
, *pend
;
497 pxm
= get_memory_proximity_domain(ma
);
499 /* fill node memory chunk structure */
500 paddr
= ma
->base_address
;
503 /* Ignore disabled entries */
504 if (!(ma
->flags
& ACPI_SRAT_MEM_ENABLED
))
507 /* record this node in proximity bitmap */
510 /* Insertion sort based on base address */
511 pend
= &node_memblk
[num_node_memblks
];
512 for (p
= &node_memblk
[0]; p
< pend
; p
++) {
513 if (paddr
< p
->start_paddr
)
517 for (q
= pend
- 1; q
>= p
; q
--)
520 p
->start_paddr
= paddr
;
527 void __init
acpi_numa_fixup(void)
529 int i
, j
, node_from
, node_to
;
531 /* If there's no SRAT, fix the phys_id and mark node 0 online */
532 if (srat_num_cpus
== 0) {
534 node_cpuid
[0].phys_id
= hard_smp_processor_id();
539 * MCD - This can probably be dropped now. No need for pxm ID to node ID
540 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
542 nodes_clear(node_online_map
);
543 for (i
= 0; i
< MAX_PXM_DOMAINS
; i
++) {
544 if (pxm_bit_test(i
)) {
545 int nid
= acpi_map_pxm_to_node(i
);
546 node_set_online(nid
);
550 /* set logical node id in memory chunk structure */
551 for (i
= 0; i
< num_node_memblks
; i
++)
552 node_memblk
[i
].nid
= pxm_to_node(node_memblk
[i
].nid
);
554 /* assign memory bank numbers for each chunk on each node */
555 for_each_online_node(i
) {
559 for (j
= 0; j
< num_node_memblks
; j
++)
560 if (node_memblk
[j
].nid
== i
)
561 node_memblk
[j
].bank
= bank
++;
564 /* set logical node id in cpu structure */
565 for_each_possible_early_cpu(i
)
566 node_cpuid
[i
].nid
= pxm_to_node(node_cpuid
[i
].nid
);
568 printk(KERN_INFO
"Number of logical nodes in system = %d\n",
570 printk(KERN_INFO
"Number of memory chunks in system = %d\n",
574 for (i
= 0; i
< MAX_NUMNODES
; i
++)
575 for (j
= 0; j
< MAX_NUMNODES
; j
++)
576 node_distance(i
, j
) = i
== j
? LOCAL_DISTANCE
:
581 memset(numa_slit
, -1, sizeof(numa_slit
));
582 for (i
= 0; i
< slit_table
->locality_count
; i
++) {
583 if (!pxm_bit_test(i
))
585 node_from
= pxm_to_node(i
);
586 for (j
= 0; j
< slit_table
->locality_count
; j
++) {
587 if (!pxm_bit_test(j
))
589 node_to
= pxm_to_node(j
);
590 node_distance(node_from
, node_to
) =
591 slit_table
->entry
[i
* slit_table
->locality_count
+ j
];
596 printk("ACPI 2.0 SLIT locality table:\n");
597 for_each_online_node(i
) {
598 for_each_online_node(j
)
599 printk("%03d ", node_distance(i
, j
));
604 #endif /* CONFIG_ACPI_NUMA */
607 * success: return IRQ number (>=0)
608 * failure: return < 0
610 int acpi_register_gsi(struct device
*dev
, u32 gsi
, int triggering
, int polarity
)
612 if (acpi_irq_model
== ACPI_IRQ_MODEL_PLATFORM
)
615 if (has_8259
&& gsi
< 16)
616 return isa_irq_to_vector(gsi
);
618 return iosapic_register_intr(gsi
,
620 ACPI_ACTIVE_HIGH
) ? IOSAPIC_POL_HIGH
:
623 ACPI_EDGE_SENSITIVE
) ? IOSAPIC_EDGE
:
626 EXPORT_SYMBOL_GPL(acpi_register_gsi
);
628 void acpi_unregister_gsi(u32 gsi
)
630 if (acpi_irq_model
== ACPI_IRQ_MODEL_PLATFORM
)
633 if (has_8259
&& gsi
< 16)
636 iosapic_unregister_intr(gsi
);
638 EXPORT_SYMBOL_GPL(acpi_unregister_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
;
645 fadt_header
= (struct acpi_table_header
*)table
;
646 if (fadt_header
->revision
!= 3)
647 return -ENODEV
; /* Only deal with ACPI 2.0 FADT */
649 fadt
= (struct acpi_table_fadt
*)fadt_header
;
651 acpi_register_gsi(NULL
, fadt
->sci_interrupt
, ACPI_LEVEL_SENSITIVE
,
656 int __init
early_acpi_boot_init(void)
661 * do a partial walk of MADT to determine how many CPUs
662 * we have including offline CPUs
664 if (acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
665 printk(KERN_ERR PREFIX
"Can't find MADT\n");
669 ret
= acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
,
670 acpi_parse_lsapic
, NR_CPUS
);
672 printk(KERN_ERR PREFIX
673 "Error parsing MADT - no LAPIC entries\n");
678 if (available_cpus
== 0) {
679 printk(KERN_INFO
"ACPI: Found 0 CPUS; assuming 1\n");
680 printk(KERN_INFO
"CPU 0 (0x%04x)", hard_smp_processor_id());
681 smp_boot_data
.cpu_phys_id
[available_cpus
] =
682 hard_smp_processor_id();
683 available_cpus
= 1; /* We've got at least one of these, no? */
685 smp_boot_data
.cpu_count
= available_cpus
;
687 /* Make boot-up look pretty */
688 printk(KERN_INFO
"%d CPUs available, %d CPUs total\n", available_cpus
,
694 int __init
acpi_boot_init(void)
700 * Parse the Multiple APIC Description Table (MADT), if exists.
701 * Note that this table provides platform SMP configuration
702 * information -- the successor to MPS tables.
705 if (acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
706 printk(KERN_ERR PREFIX
"Can't find MADT\n");
712 if (acpi_table_parse_madt
713 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
, acpi_parse_lapic_addr_ovr
, 0) < 0)
714 printk(KERN_ERR PREFIX
715 "Error parsing LAPIC address override entry\n");
717 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0)
719 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
723 if (acpi_table_parse_madt
724 (ACPI_MADT_TYPE_IO_SAPIC
, acpi_parse_iosapic
, NR_IOSAPICS
) < 1) {
725 if (!ia64_platform_is("sn2"))
726 printk(KERN_ERR PREFIX
727 "Error parsing MADT - no IOSAPIC entries\n");
730 /* System-Level Interrupt Routing */
732 if (acpi_table_parse_madt
733 (ACPI_MADT_TYPE_INTERRUPT_SOURCE
, acpi_parse_plat_int_src
,
734 ACPI_MAX_PLATFORM_INTERRUPTS
) < 0)
735 printk(KERN_ERR PREFIX
736 "Error parsing platform interrupt source entry\n");
738 if (acpi_table_parse_madt
739 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
, 0) < 0)
740 printk(KERN_ERR PREFIX
741 "Error parsing interrupt source overrides entry\n");
743 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
, 0) < 0)
744 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
748 * FADT says whether a legacy keyboard controller is present.
749 * The FADT also contains an SCI_INT line, by which the system
750 * gets interrupts such as power and sleep buttons. If it's not
751 * on a Legacy interrupt, it needs to be setup.
753 if (acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
))
754 printk(KERN_ERR PREFIX
"Can't find FADT\n");
756 #ifdef CONFIG_ACPI_NUMA
758 if (srat_num_cpus
== 0) {
760 for (cpu
= 0; cpu
< smp_boot_data
.cpu_count
; cpu
++)
761 if (smp_boot_data
.cpu_phys_id
[cpu
] !=
762 hard_smp_processor_id())
763 node_cpuid
[i
++].phys_id
=
764 smp_boot_data
.cpu_phys_id
[cpu
];
767 build_cpu_to_node_map();
772 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
776 if (has_8259
&& gsi
< 16)
777 *irq
= isa_irq_to_vector(gsi
);
779 tmp
= gsi_to_irq(gsi
);
787 int acpi_isa_irq_to_gsi(unsigned isa_irq
, u32
*gsi
)
796 * ACPI based hotplug CPU support
798 #ifdef CONFIG_ACPI_HOTPLUG_CPU
799 int acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
801 #ifdef CONFIG_ACPI_NUMA
803 * We don't have cpu-only-node hotadd. But if the system equips
804 * SRAT table, pxm is already found and node is ready.
805 * So, just pxm_to_nid(pxm) is OK.
806 * This code here is for the system which doesn't have full SRAT
807 * table for possible cpus.
809 node_cpuid
[cpu
].phys_id
= physid
;
810 node_cpuid
[cpu
].nid
= acpi_get_node(handle
);
815 int additional_cpus __initdata
= -1;
817 static __init
int setup_additional_cpus(char *s
)
820 additional_cpus
= simple_strtol(s
, NULL
, 0);
825 early_param("additional_cpus", setup_additional_cpus
);
828 * cpu_possible_mask should be static, it cannot change as CPUs
829 * are onlined, or offlined. The reason is per-cpu data-structures
830 * are allocated by some modules at init time, and dont expect to
831 * do this dynamically on cpu arrival/departure.
832 * cpu_present_mask on the other hand can change dynamically.
833 * In case when cpu_hotplug is not compiled, then we resort to current
834 * behaviour, which is cpu_possible == cpu_present.
837 * Three ways to find out the number of additional hotplug CPUs:
838 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
839 * - The user can overwrite it with additional_cpus=NUM
840 * - Otherwise don't reserve additional CPUs.
842 __init
void prefill_possible_map(void)
845 int possible
, disabled_cpus
;
847 disabled_cpus
= total_cpus
- available_cpus
;
849 if (additional_cpus
== -1) {
850 if (disabled_cpus
> 0)
851 additional_cpus
= disabled_cpus
;
856 possible
= available_cpus
+ additional_cpus
;
858 if (possible
> nr_cpu_ids
)
859 possible
= nr_cpu_ids
;
861 printk(KERN_INFO
"SMP: Allowing %d CPUs, %d hotplug CPUs\n",
862 possible
, max((possible
- available_cpus
), 0));
864 for (i
= 0; i
< possible
; i
++)
865 set_cpu_possible(i
, true);
868 static int _acpi_map_lsapic(acpi_handle handle
, int physid
, int *pcpu
)
873 cpumask_complement(&tmp_map
, cpu_present_mask
);
874 cpu
= cpumask_first(&tmp_map
);
875 if (cpu
>= nr_cpu_ids
)
878 acpi_map_cpu2node(handle
, cpu
, physid
);
880 set_cpu_present(cpu
, true);
881 ia64_cpu_to_sapicid
[cpu
] = physid
;
883 acpi_processor_set_pdc(handle
);
889 /* wrapper to silence section mismatch warning */
890 int __ref
acpi_map_cpu(acpi_handle handle
, phys_cpuid_t physid
, u32 acpi_id
,
893 return _acpi_map_lsapic(handle
, physid
, pcpu
);
895 EXPORT_SYMBOL(acpi_map_cpu
);
897 int acpi_unmap_cpu(int cpu
)
899 ia64_cpu_to_sapicid
[cpu
] = -1;
900 set_cpu_present(cpu
, false);
902 #ifdef CONFIG_ACPI_NUMA
903 /* NUMA specific cleanup's */
908 EXPORT_SYMBOL(acpi_unmap_cpu
);
909 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
911 #ifdef CONFIG_ACPI_NUMA
912 static acpi_status
acpi_map_iosapic(acpi_handle handle
, u32 depth
,
913 void *context
, void **ret
)
915 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
916 union acpi_object
*obj
;
917 struct acpi_madt_io_sapic
*iosapic
;
918 unsigned int gsi_base
;
921 /* Only care about objects w/ a method that returns the MADT */
922 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
925 if (!buffer
.length
|| !buffer
.pointer
)
928 obj
= buffer
.pointer
;
929 if (obj
->type
!= ACPI_TYPE_BUFFER
||
930 obj
->buffer
.length
< sizeof(*iosapic
)) {
931 kfree(buffer
.pointer
);
935 iosapic
= (struct acpi_madt_io_sapic
*)obj
->buffer
.pointer
;
937 if (iosapic
->header
.type
!= ACPI_MADT_TYPE_IO_SAPIC
) {
938 kfree(buffer
.pointer
);
942 gsi_base
= iosapic
->global_irq_base
;
944 kfree(buffer
.pointer
);
946 /* OK, it's an IOSAPIC MADT entry; associate it with a node */
947 node
= acpi_get_node(handle
);
948 if (node
== NUMA_NO_NODE
|| !node_online(node
) ||
949 cpumask_empty(cpumask_of_node(node
)))
952 /* We know a gsi to node mapping! */
953 map_iosapic_to_node(gsi_base
, node
);
958 acpi_map_iosapics (void)
960 acpi_get_devices(NULL
, acpi_map_iosapic
, NULL
, NULL
);
964 fs_initcall(acpi_map_iosapics
);
965 #endif /* CONFIG_ACPI_NUMA */
967 int __ref
acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
971 if ((err
= iosapic_init(phys_addr
, gsi_base
)))
974 #ifdef CONFIG_ACPI_NUMA
975 acpi_map_iosapic(handle
, 0, NULL
, NULL
);
976 #endif /* CONFIG_ACPI_NUMA */
981 EXPORT_SYMBOL(acpi_register_ioapic
);
983 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
985 return iosapic_remove(gsi_base
);
988 EXPORT_SYMBOL(acpi_unregister_ioapic
);
991 * acpi_suspend_lowlevel() - save kernel state and suspend.
993 * TBD when when IA64 starts to support suspend...
995 int acpi_suspend_lowlevel(void) { return 0; }