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>
48 #include <asm/iosapic.h>
49 #include <asm/machvec.h>
51 #include <asm/system.h>
54 #include <asm/cyclone.h>
55 #include <asm/xen/hypervisor.h>
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
61 #define PREFIX "ACPI: "
63 void (*pm_idle
) (void);
64 EXPORT_SYMBOL(pm_idle
);
65 void (*pm_power_off
) (void);
66 EXPORT_SYMBOL(pm_power_off
);
68 unsigned int acpi_cpei_override
;
69 unsigned int acpi_cpei_phys_cpuid
;
71 unsigned long acpi_wakeup_address
= 0;
73 #ifdef CONFIG_IA64_GENERIC
74 static unsigned long __init
acpi_find_rsdp(void)
76 unsigned long rsdp_phys
= 0;
78 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
79 rsdp_phys
= efi
.acpi20
;
80 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
81 printk(KERN_WARNING PREFIX
82 "v1.0/r0.71 tables no longer supported\n");
88 acpi_get_sysname(void)
90 #ifdef CONFIG_IA64_GENERIC
91 unsigned long rsdp_phys
;
92 struct acpi_table_rsdp
*rsdp
;
93 struct acpi_table_xsdt
*xsdt
;
94 struct acpi_table_header
*hdr
;
99 rsdp_phys
= acpi_find_rsdp();
102 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
106 rsdp
= (struct acpi_table_rsdp
*)__va(rsdp_phys
);
107 if (strncmp(rsdp
->signature
, ACPI_SIG_RSDP
, sizeof(ACPI_SIG_RSDP
) - 1)) {
109 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
113 xsdt
= (struct acpi_table_xsdt
*)__va(rsdp
->xsdt_physical_address
);
115 if (strncmp(hdr
->signature
, ACPI_SIG_XSDT
, sizeof(ACPI_SIG_XSDT
) - 1)) {
117 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
121 if (!strcmp(hdr
->oem_id
, "HP")) {
123 } else if (!strcmp(hdr
->oem_id
, "SGI")) {
124 if (!strcmp(hdr
->oem_table_id
+ 4, "UV"))
128 } else if (xen_pv_domain() && !strcmp(hdr
->oem_id
, "XEN")) {
133 /* Look for Intel IOMMU */
134 nentries
= (hdr
->length
- sizeof(*hdr
)) /
135 sizeof(xsdt
->table_offset_entry
[0]);
136 for (i
= 0; i
< nentries
; i
++) {
137 hdr
= __va(xsdt
->table_offset_entry
[i
]);
138 if (strncmp(hdr
->signature
, ACPI_SIG_DMAR
,
139 sizeof(ACPI_SIG_DMAR
) - 1) == 0)
146 # if defined (CONFIG_IA64_HP_SIM)
148 # elif defined (CONFIG_IA64_HP_ZX1)
150 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
151 return "hpzx1_swiotlb";
152 # elif defined (CONFIG_IA64_SGI_SN2)
154 # elif defined (CONFIG_IA64_SGI_UV)
156 # elif defined (CONFIG_IA64_DIG)
158 # elif defined (CONFIG_IA64_XEN_GUEST)
160 # elif defined(CONFIG_IA64_DIG_VTD)
163 # error Unknown platform. Fix acpi.c.
170 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
172 /* Array to record platform interrupt vectors for generic interrupt routing. */
173 int platform_intr_list
[ACPI_MAX_PLATFORM_INTERRUPTS
] = {
174 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS
- 1] = -1
177 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_IOSAPIC
;
180 * Interrupt routing API for device drivers. Provides interrupt vector for
181 * a generic platform event. Currently only CPEI is implemented.
183 int acpi_request_vector(u32 int_type
)
187 if (int_type
< ACPI_MAX_PLATFORM_INTERRUPTS
) {
188 /* corrected platform error interrupt */
189 vector
= platform_intr_list
[int_type
];
192 "acpi_request_vector(): invalid interrupt type\n");
196 char *__init
__acpi_map_table(unsigned long phys_addr
, unsigned long size
)
198 return __va(phys_addr
);
201 /* --------------------------------------------------------------------------
202 Boot-time Table Parsing
203 -------------------------------------------------------------------------- */
205 static int total_cpus __initdata
;
206 static int available_cpus __initdata
;
207 struct acpi_table_madt
*acpi_madt __initdata
;
211 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header
* header
,
212 const unsigned long end
)
214 struct acpi_madt_local_apic_override
*lapic
;
216 lapic
= (struct acpi_madt_local_apic_override
*)header
;
218 if (BAD_MADT_ENTRY(lapic
, end
))
221 if (lapic
->address
) {
222 iounmap(ipi_base_addr
);
223 ipi_base_addr
= ioremap(lapic
->address
, 0);
229 acpi_parse_lsapic(struct acpi_subtable_header
* header
, const unsigned long end
)
231 struct acpi_madt_local_sapic
*lsapic
;
233 lsapic
= (struct acpi_madt_local_sapic
*)header
;
235 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
237 if (lsapic
->lapic_flags
& ACPI_MADT_ENABLED
) {
239 smp_boot_data
.cpu_phys_id
[available_cpus
] =
240 (lsapic
->id
<< 8) | lsapic
->eid
;
250 acpi_parse_lapic_nmi(struct acpi_subtable_header
* header
, const unsigned long end
)
252 struct acpi_madt_local_apic_nmi
*lacpi_nmi
;
254 lacpi_nmi
= (struct acpi_madt_local_apic_nmi
*)header
;
256 if (BAD_MADT_ENTRY(lacpi_nmi
, end
))
259 /* TBD: Support lapic_nmi entries */
264 acpi_parse_iosapic(struct acpi_subtable_header
* header
, const unsigned long end
)
266 struct acpi_madt_io_sapic
*iosapic
;
268 iosapic
= (struct acpi_madt_io_sapic
*)header
;
270 if (BAD_MADT_ENTRY(iosapic
, end
))
273 return iosapic_init(iosapic
->address
, iosapic
->global_irq_base
);
276 static unsigned int __initdata acpi_madt_rev
;
279 acpi_parse_plat_int_src(struct acpi_subtable_header
* header
,
280 const unsigned long end
)
282 struct acpi_madt_interrupt_source
*plintsrc
;
285 plintsrc
= (struct acpi_madt_interrupt_source
*)header
;
287 if (BAD_MADT_ENTRY(plintsrc
, end
))
291 * Get vector assignment for this interrupt, set attributes,
292 * and program the IOSAPIC routing table.
294 vector
= iosapic_register_platform_intr(plintsrc
->type
,
295 plintsrc
->global_irq
,
296 plintsrc
->io_sapic_vector
,
299 ((plintsrc
->inti_flags
& ACPI_MADT_POLARITY_MASK
) ==
300 ACPI_MADT_POLARITY_ACTIVE_HIGH
) ?
301 IOSAPIC_POL_HIGH
: IOSAPIC_POL_LOW
,
302 ((plintsrc
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) ==
303 ACPI_MADT_TRIGGER_EDGE
) ?
304 IOSAPIC_EDGE
: IOSAPIC_LEVEL
);
306 platform_intr_list
[plintsrc
->type
] = vector
;
307 if (acpi_madt_rev
> 1) {
308 acpi_cpei_override
= plintsrc
->flags
& ACPI_MADT_CPEI_OVERRIDE
;
312 * Save the physical id, so we can check when its being removed
314 acpi_cpei_phys_cpuid
= ((plintsrc
->id
<< 8) | (plintsrc
->eid
)) & 0xffff;
319 #ifdef CONFIG_HOTPLUG_CPU
320 unsigned int can_cpei_retarget(void)
322 extern int cpe_vector
;
323 extern unsigned int force_cpei_retarget
;
326 * Only if CPEI is supported and the override flag
327 * is present, otherwise return that its re-targettable
328 * if we are in polling mode.
330 if (cpe_vector
> 0) {
331 if (acpi_cpei_override
|| force_cpei_retarget
)
339 unsigned int is_cpu_cpei_target(unsigned int cpu
)
341 unsigned int logical_id
;
343 logical_id
= cpu_logical_id(acpi_cpei_phys_cpuid
);
345 if (logical_id
== cpu
)
351 void set_cpei_target_cpu(unsigned int cpu
)
353 acpi_cpei_phys_cpuid
= cpu_physical_id(cpu
);
357 unsigned int get_cpei_target_cpu(void)
359 return acpi_cpei_phys_cpuid
;
363 acpi_parse_int_src_ovr(struct acpi_subtable_header
* header
,
364 const unsigned long end
)
366 struct acpi_madt_interrupt_override
*p
;
368 p
= (struct acpi_madt_interrupt_override
*)header
;
370 if (BAD_MADT_ENTRY(p
, end
))
373 iosapic_override_isa_irq(p
->source_irq
, p
->global_irq
,
374 ((p
->inti_flags
& ACPI_MADT_POLARITY_MASK
) ==
375 ACPI_MADT_POLARITY_ACTIVE_HIGH
) ?
376 IOSAPIC_POL_HIGH
: IOSAPIC_POL_LOW
,
377 ((p
->inti_flags
& ACPI_MADT_TRIGGER_MASK
) ==
378 ACPI_MADT_TRIGGER_EDGE
) ?
379 IOSAPIC_EDGE
: IOSAPIC_LEVEL
);
384 acpi_parse_nmi_src(struct acpi_subtable_header
* header
, const unsigned long end
)
386 struct acpi_madt_nmi_source
*nmi_src
;
388 nmi_src
= (struct acpi_madt_nmi_source
*)header
;
390 if (BAD_MADT_ENTRY(nmi_src
, end
))
393 /* TBD: Support nimsrc entries */
397 static void __init
acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
399 if (!strncmp(oem_id
, "IBM", 3) && (!strncmp(oem_table_id
, "SERMOW", 6))) {
402 * Unfortunately ITC_DRIFT is not yet part of the
403 * official SAL spec, so the ITC_DRIFT bit is not
404 * set by the BIOS on this hardware.
406 sal_platform_features
|= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT
;
412 static int __init
acpi_parse_madt(struct acpi_table_header
*table
)
417 acpi_madt
= (struct acpi_table_madt
*)table
;
419 acpi_madt_rev
= acpi_madt
->header
.revision
;
421 /* remember the value for reference after free_initmem() */
422 #ifdef CONFIG_ITANIUM
423 has_8259
= 1; /* Firmware on old Itanium systems is broken */
425 has_8259
= acpi_madt
->flags
& ACPI_MADT_PCAT_COMPAT
;
427 iosapic_system_init(has_8259
);
429 /* Get base address of IPI Message Block */
431 if (acpi_madt
->address
)
432 ipi_base_addr
= ioremap(acpi_madt
->address
, 0);
434 printk(KERN_INFO PREFIX
"Local APIC address %p\n", ipi_base_addr
);
436 acpi_madt_oem_check(acpi_madt
->header
.oem_id
,
437 acpi_madt
->header
.oem_table_id
);
442 #ifdef CONFIG_ACPI_NUMA
446 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
448 static int __initdata srat_num_cpus
; /* number of cpus */
449 static u32 __devinitdata pxm_flag
[PXM_FLAG_LEN
];
450 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
451 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
452 static struct acpi_table_slit __initdata
*slit_table
;
453 cpumask_t early_cpu_possible_map
= CPU_MASK_NONE
;
455 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity
*pa
)
459 pxm
= pa
->proximity_domain_lo
;
460 if (ia64_platform_is("sn2"))
461 pxm
+= pa
->proximity_domain_hi
[0] << 8;
465 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity
*ma
)
469 pxm
= ma
->proximity_domain
;
470 if (!ia64_platform_is("sn2"))
477 * ACPI 2.0 SLIT (System Locality Information Table)
478 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
480 void __init
acpi_numa_slit_init(struct acpi_table_slit
*slit
)
484 len
= sizeof(struct acpi_table_header
) + 8
485 + slit
->locality_count
* slit
->locality_count
;
486 if (slit
->header
.length
!= len
) {
488 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
489 len
, slit
->header
.length
);
496 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity
*pa
)
500 if (!(pa
->flags
& ACPI_SRAT_CPU_ENABLED
))
503 pxm
= get_processor_proximity_domain(pa
);
505 /* record this node in proximity bitmap */
508 node_cpuid
[srat_num_cpus
].phys_id
=
509 (pa
->apic_id
<< 8) | (pa
->local_sapic_eid
);
510 /* nid should be overridden as logical node id later */
511 node_cpuid
[srat_num_cpus
].nid
= pxm
;
512 cpu_set(srat_num_cpus
, early_cpu_possible_map
);
517 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity
*ma
)
519 unsigned long paddr
, size
;
521 struct node_memblk_s
*p
, *q
, *pend
;
523 pxm
= get_memory_proximity_domain(ma
);
525 /* fill node memory chunk structure */
526 paddr
= ma
->base_address
;
529 /* Ignore disabled entries */
530 if (!(ma
->flags
& ACPI_SRAT_MEM_ENABLED
))
533 /* record this node in proximity bitmap */
536 /* Insertion sort based on base address */
537 pend
= &node_memblk
[num_node_memblks
];
538 for (p
= &node_memblk
[0]; p
< pend
; p
++) {
539 if (paddr
< p
->start_paddr
)
543 for (q
= pend
- 1; q
>= p
; q
--)
546 p
->start_paddr
= paddr
;
552 void __init
acpi_numa_arch_fixup(void)
554 int i
, j
, node_from
, node_to
;
556 /* If there's no SRAT, fix the phys_id and mark node 0 online */
557 if (srat_num_cpus
== 0) {
559 node_cpuid
[0].phys_id
= hard_smp_processor_id();
564 * MCD - This can probably be dropped now. No need for pxm ID to node ID
565 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
567 nodes_clear(node_online_map
);
568 for (i
= 0; i
< MAX_PXM_DOMAINS
; i
++) {
569 if (pxm_bit_test(i
)) {
570 int nid
= acpi_map_pxm_to_node(i
);
571 node_set_online(nid
);
575 /* set logical node id in memory chunk structure */
576 for (i
= 0; i
< num_node_memblks
; i
++)
577 node_memblk
[i
].nid
= pxm_to_node(node_memblk
[i
].nid
);
579 /* assign memory bank numbers for each chunk on each node */
580 for_each_online_node(i
) {
584 for (j
= 0; j
< num_node_memblks
; j
++)
585 if (node_memblk
[j
].nid
== i
)
586 node_memblk
[j
].bank
= bank
++;
589 /* set logical node id in cpu structure */
590 for_each_possible_early_cpu(i
)
591 node_cpuid
[i
].nid
= pxm_to_node(node_cpuid
[i
].nid
);
593 printk(KERN_INFO
"Number of logical nodes in system = %d\n",
595 printk(KERN_INFO
"Number of memory chunks in system = %d\n",
599 for (i
= 0; i
< MAX_NUMNODES
; i
++)
600 for (j
= 0; j
< MAX_NUMNODES
; j
++)
601 node_distance(i
, j
) = i
== j
? LOCAL_DISTANCE
:
606 memset(numa_slit
, -1, sizeof(numa_slit
));
607 for (i
= 0; i
< slit_table
->locality_count
; i
++) {
608 if (!pxm_bit_test(i
))
610 node_from
= pxm_to_node(i
);
611 for (j
= 0; j
< slit_table
->locality_count
; j
++) {
612 if (!pxm_bit_test(j
))
614 node_to
= pxm_to_node(j
);
615 node_distance(node_from
, node_to
) =
616 slit_table
->entry
[i
* slit_table
->locality_count
+ j
];
621 printk("ACPI 2.0 SLIT locality table:\n");
622 for_each_online_node(i
) {
623 for_each_online_node(j
)
624 printk("%03d ", node_distance(i
, j
));
629 #endif /* CONFIG_ACPI_NUMA */
632 * success: return IRQ number (>=0)
633 * failure: return < 0
635 int acpi_register_gsi(u32 gsi
, int triggering
, int polarity
)
637 if (acpi_irq_model
== ACPI_IRQ_MODEL_PLATFORM
)
640 if (has_8259
&& gsi
< 16)
641 return isa_irq_to_vector(gsi
);
643 return iosapic_register_intr(gsi
,
645 ACPI_ACTIVE_HIGH
) ? IOSAPIC_POL_HIGH
:
648 ACPI_EDGE_SENSITIVE
) ? IOSAPIC_EDGE
:
652 void acpi_unregister_gsi(u32 gsi
)
654 if (acpi_irq_model
== ACPI_IRQ_MODEL_PLATFORM
)
657 if (has_8259
&& gsi
< 16)
660 iosapic_unregister_intr(gsi
);
663 static int __init
acpi_parse_fadt(struct acpi_table_header
*table
)
665 struct acpi_table_header
*fadt_header
;
666 struct acpi_table_fadt
*fadt
;
671 fadt_header
= (struct acpi_table_header
*)table
;
672 if (fadt_header
->revision
!= 3)
673 return -ENODEV
; /* Only deal with ACPI 2.0 FADT */
675 fadt
= (struct acpi_table_fadt
*)fadt_header
;
677 acpi_register_gsi(fadt
->sci_interrupt
, ACPI_LEVEL_SENSITIVE
, ACPI_ACTIVE_LOW
);
681 int __init
acpi_boot_init(void)
687 * Parse the Multiple APIC Description Table (MADT), if exists.
688 * Note that this table provides platform SMP configuration
689 * information -- the successor to MPS tables.
692 if (acpi_table_parse(ACPI_SIG_MADT
, acpi_parse_madt
)) {
693 printk(KERN_ERR PREFIX
"Can't find MADT\n");
699 if (acpi_table_parse_madt
700 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE
, acpi_parse_lapic_addr_ovr
, 0) < 0)
701 printk(KERN_ERR PREFIX
702 "Error parsing LAPIC address override entry\n");
704 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC
, acpi_parse_lsapic
, NR_CPUS
)
706 printk(KERN_ERR PREFIX
707 "Error parsing MADT - no LAPIC entries\n");
709 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI
, acpi_parse_lapic_nmi
, 0)
711 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
715 if (acpi_table_parse_madt
716 (ACPI_MADT_TYPE_IO_SAPIC
, acpi_parse_iosapic
, NR_IOSAPICS
) < 1) {
717 if (!ia64_platform_is("sn2"))
718 printk(KERN_ERR PREFIX
719 "Error parsing MADT - no IOSAPIC entries\n");
722 /* System-Level Interrupt Routing */
724 if (acpi_table_parse_madt
725 (ACPI_MADT_TYPE_INTERRUPT_SOURCE
, acpi_parse_plat_int_src
,
726 ACPI_MAX_PLATFORM_INTERRUPTS
) < 0)
727 printk(KERN_ERR PREFIX
728 "Error parsing platform interrupt source entry\n");
730 if (acpi_table_parse_madt
731 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE
, acpi_parse_int_src_ovr
, 0) < 0)
732 printk(KERN_ERR PREFIX
733 "Error parsing interrupt source overrides entry\n");
735 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE
, acpi_parse_nmi_src
, 0) < 0)
736 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
740 * FADT says whether a legacy keyboard controller is present.
741 * The FADT also contains an SCI_INT line, by which the system
742 * gets interrupts such as power and sleep buttons. If it's not
743 * on a Legacy interrupt, it needs to be setup.
745 if (acpi_table_parse(ACPI_SIG_FADT
, acpi_parse_fadt
))
746 printk(KERN_ERR PREFIX
"Can't find FADT\n");
749 if (available_cpus
== 0) {
750 printk(KERN_INFO
"ACPI: Found 0 CPUS; assuming 1\n");
751 printk(KERN_INFO
"CPU 0 (0x%04x)", hard_smp_processor_id());
752 smp_boot_data
.cpu_phys_id
[available_cpus
] =
753 hard_smp_processor_id();
754 available_cpus
= 1; /* We've got at least one of these, no? */
756 smp_boot_data
.cpu_count
= available_cpus
;
759 # ifdef CONFIG_ACPI_NUMA
760 if (srat_num_cpus
== 0) {
762 for (cpu
= 0; cpu
< smp_boot_data
.cpu_count
; cpu
++)
763 if (smp_boot_data
.cpu_phys_id
[cpu
] !=
764 hard_smp_processor_id())
765 node_cpuid
[i
++].phys_id
=
766 smp_boot_data
.cpu_phys_id
[cpu
];
770 #ifdef CONFIG_ACPI_NUMA
771 build_cpu_to_node_map();
773 /* Make boot-up look pretty */
774 printk(KERN_INFO
"%d CPUs available, %d CPUs total\n", available_cpus
,
779 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
783 if (has_8259
&& gsi
< 16)
784 *irq
= isa_irq_to_vector(gsi
);
786 tmp
= gsi_to_irq(gsi
);
795 * ACPI based hotplug CPU support
797 #ifdef CONFIG_ACPI_HOTPLUG_CPU
799 int acpi_map_cpu2node(acpi_handle handle
, int cpu
, int physid
)
801 #ifdef CONFIG_ACPI_NUMA
805 pxm_id
= acpi_get_pxm(handle
);
807 * We don't have cpu-only-node hotadd. But if the system equips
808 * SRAT table, pxm is already found and node is ready.
809 * So, just pxm_to_nid(pxm) is OK.
810 * This code here is for the system which doesn't have full SRAT
811 * table for possible cpus.
813 nid
= acpi_map_pxm_to_node(pxm_id
);
814 node_cpuid
[cpu
].phys_id
= physid
;
815 node_cpuid
[cpu
].nid
= nid
;
820 int additional_cpus __initdata
= -1;
822 static __init
int setup_additional_cpus(char *s
)
825 additional_cpus
= simple_strtol(s
, NULL
, 0);
830 early_param("additional_cpus", setup_additional_cpus
);
833 * cpu_possible_map should be static, it cannot change as CPUs
834 * are onlined, or offlined. The reason is per-cpu data-structures
835 * are allocated by some modules at init time, and dont expect to
836 * do this dynamically on cpu arrival/departure.
837 * cpu_present_map on the other hand can change dynamically.
838 * In case when cpu_hotplug is not compiled, then we resort to current
839 * behaviour, which is cpu_possible == cpu_present.
842 * Three ways to find out the number of additional hotplug CPUs:
843 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
844 * - The user can overwrite it with additional_cpus=NUM
845 * - Otherwise don't reserve additional CPUs.
847 __init
void prefill_possible_map(void)
850 int possible
, disabled_cpus
;
852 disabled_cpus
= total_cpus
- available_cpus
;
854 if (additional_cpus
== -1) {
855 if (disabled_cpus
> 0)
856 additional_cpus
= disabled_cpus
;
861 possible
= available_cpus
+ additional_cpus
;
863 if (possible
> NR_CPUS
)
866 printk(KERN_INFO
"SMP: Allowing %d CPUs, %d hotplug CPUs\n",
867 possible
, max((possible
- available_cpus
), 0));
869 for (i
= 0; i
< possible
; i
++)
870 cpu_set(i
, cpu_possible_map
);
873 int acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
875 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
876 union acpi_object
*obj
;
877 struct acpi_madt_local_sapic
*lsapic
;
881 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
884 if (!buffer
.length
|| !buffer
.pointer
)
887 obj
= buffer
.pointer
;
888 if (obj
->type
!= ACPI_TYPE_BUFFER
)
890 kfree(buffer
.pointer
);
894 lsapic
= (struct acpi_madt_local_sapic
*)obj
->buffer
.pointer
;
896 if ((lsapic
->header
.type
!= ACPI_MADT_TYPE_LOCAL_SAPIC
) ||
897 (!(lsapic
->lapic_flags
& ACPI_MADT_ENABLED
))) {
898 kfree(buffer
.pointer
);
902 physid
= ((lsapic
->id
<< 8) | (lsapic
->eid
));
904 kfree(buffer
.pointer
);
905 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
906 buffer
.pointer
= NULL
;
908 cpus_complement(tmp_map
, cpu_present_map
);
909 cpu
= first_cpu(tmp_map
);
913 acpi_map_cpu2node(handle
, cpu
, physid
);
915 cpu_set(cpu
, cpu_present_map
);
916 ia64_cpu_to_sapicid
[cpu
] = physid
;
922 EXPORT_SYMBOL(acpi_map_lsapic
);
924 int acpi_unmap_lsapic(int cpu
)
926 ia64_cpu_to_sapicid
[cpu
] = -1;
927 cpu_clear(cpu
, cpu_present_map
);
929 #ifdef CONFIG_ACPI_NUMA
930 /* NUMA specific cleanup's */
936 EXPORT_SYMBOL(acpi_unmap_lsapic
);
937 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
939 #ifdef CONFIG_ACPI_NUMA
940 static acpi_status __devinit
941 acpi_map_iosapic(acpi_handle handle
, u32 depth
, void *context
, void **ret
)
943 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
944 union acpi_object
*obj
;
945 struct acpi_madt_io_sapic
*iosapic
;
946 unsigned int gsi_base
;
949 /* Only care about objects w/ a method that returns the MADT */
950 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
953 if (!buffer
.length
|| !buffer
.pointer
)
956 obj
= buffer
.pointer
;
957 if (obj
->type
!= ACPI_TYPE_BUFFER
||
958 obj
->buffer
.length
< sizeof(*iosapic
)) {
959 kfree(buffer
.pointer
);
963 iosapic
= (struct acpi_madt_io_sapic
*)obj
->buffer
.pointer
;
965 if (iosapic
->header
.type
!= ACPI_MADT_TYPE_IO_SAPIC
) {
966 kfree(buffer
.pointer
);
970 gsi_base
= iosapic
->global_irq_base
;
972 kfree(buffer
.pointer
);
975 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
976 * us which node to associate this with.
978 pxm
= acpi_get_pxm(handle
);
982 node
= pxm_to_node(pxm
);
984 if (node
>= MAX_NUMNODES
|| !node_online(node
) ||
985 cpus_empty(node_to_cpumask(node
)))
988 /* We know a gsi to node mapping! */
989 map_iosapic_to_node(gsi_base
, node
);
994 acpi_map_iosapics (void)
996 acpi_get_devices(NULL
, acpi_map_iosapic
, NULL
, NULL
);
1000 fs_initcall(acpi_map_iosapics
);
1001 #endif /* CONFIG_ACPI_NUMA */
1003 int __ref
acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
1007 if ((err
= iosapic_init(phys_addr
, gsi_base
)))
1010 #ifdef CONFIG_ACPI_NUMA
1011 acpi_map_iosapic(handle
, 0, NULL
, NULL
);
1012 #endif /* CONFIG_ACPI_NUMA */
1017 EXPORT_SYMBOL(acpi_register_ioapic
);
1019 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
1021 return iosapic_remove(gsi_base
);
1024 EXPORT_SYMBOL(acpi_unregister_ioapic
);
1027 * acpi_save_state_mem() - save kernel state
1029 * TBD when when IA64 starts to support suspend...
1031 int acpi_save_state_mem(void) { return 0; }
1034 * acpi_restore_state()
1036 void acpi_restore_state_mem(void) {}
1039 * do_suspend_lowlevel()
1041 void do_suspend_lowlevel(void) {}
1043 #endif /* CONFIG_ACPI */