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/config.h>
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/kernel.h>
39 #include <linux/sched.h>
40 #include <linux/smp.h>
41 #include <linux/string.h>
42 #include <linux/types.h>
43 #include <linux/irq.h>
44 #include <linux/acpi.h>
45 #include <linux/efi.h>
46 #include <linux/mmzone.h>
47 #include <linux/nodemask.h>
49 #include <asm/iosapic.h>
50 #include <asm/machvec.h>
52 #include <asm/system.h>
55 #include <asm/cyclone.h>
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((acpi_table_entry_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 char acpi_kbd_controller_present
= 1;
69 unsigned char acpi_legacy_devices
;
71 static unsigned int __initdata acpi_madt_rev
;
73 unsigned int acpi_cpei_override
;
74 unsigned int acpi_cpei_phys_cpuid
;
76 #define MAX_SAPICS 256
77 u16 ia64_acpiid_to_sapicid
[MAX_SAPICS
] = {[0 ... MAX_SAPICS
- 1] = -1 };
79 EXPORT_SYMBOL(ia64_acpiid_to_sapicid
);
81 const char *acpi_get_sysname(void)
83 #ifdef CONFIG_IA64_GENERIC
84 unsigned long rsdp_phys
;
85 struct acpi20_table_rsdp
*rsdp
;
86 struct acpi_table_xsdt
*xsdt
;
87 struct acpi_table_header
*hdr
;
89 rsdp_phys
= acpi_find_rsdp();
92 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
96 rsdp
= (struct acpi20_table_rsdp
*)__va(rsdp_phys
);
97 if (strncmp(rsdp
->signature
, RSDP_SIG
, sizeof(RSDP_SIG
) - 1)) {
99 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
103 xsdt
= (struct acpi_table_xsdt
*)__va(rsdp
->xsdt_address
);
105 if (strncmp(hdr
->signature
, XSDT_SIG
, sizeof(XSDT_SIG
) - 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")) {
119 # if defined (CONFIG_IA64_HP_SIM)
121 # elif defined (CONFIG_IA64_HP_ZX1)
123 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
124 return "hpzx1_swiotlb";
125 # elif defined (CONFIG_IA64_SGI_SN2)
127 # elif defined (CONFIG_IA64_DIG)
130 # error Unknown platform. Fix acpi.c.
137 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
139 /* Array to record platform interrupt vectors for generic interrupt routing. */
140 int platform_intr_list
[ACPI_MAX_PLATFORM_INTERRUPTS
] = {
141 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS
- 1] = -1
144 enum acpi_irq_model_id acpi_irq_model
= ACPI_IRQ_MODEL_IOSAPIC
;
147 * Interrupt routing API for device drivers. Provides interrupt vector for
148 * a generic platform event. Currently only CPEI is implemented.
150 int acpi_request_vector(u32 int_type
)
154 if (int_type
< ACPI_MAX_PLATFORM_INTERRUPTS
) {
155 /* corrected platform error interrupt */
156 vector
= platform_intr_list
[int_type
];
159 "acpi_request_vector(): invalid interrupt type\n");
163 char *__acpi_map_table(unsigned long phys_addr
, unsigned long size
)
165 return __va(phys_addr
);
168 /* --------------------------------------------------------------------------
169 Boot-time Table Parsing
170 -------------------------------------------------------------------------- */
172 static int total_cpus __initdata
;
173 static int available_cpus __initdata
;
174 struct acpi_table_madt
*acpi_madt __initdata
;
178 acpi_parse_lapic_addr_ovr(acpi_table_entry_header
* header
,
179 const unsigned long end
)
181 struct acpi_table_lapic_addr_ovr
*lapic
;
183 lapic
= (struct acpi_table_lapic_addr_ovr
*)header
;
185 if (BAD_MADT_ENTRY(lapic
, end
))
188 if (lapic
->address
) {
189 iounmap(ipi_base_addr
);
190 ipi_base_addr
= ioremap(lapic
->address
, 0);
196 acpi_parse_lsapic(acpi_table_entry_header
* header
, const unsigned long end
)
198 struct acpi_table_lsapic
*lsapic
;
200 lsapic
= (struct acpi_table_lsapic
*)header
;
202 if (BAD_MADT_ENTRY(lsapic
, end
))
205 if (lsapic
->flags
.enabled
) {
207 smp_boot_data
.cpu_phys_id
[available_cpus
] =
208 (lsapic
->id
<< 8) | lsapic
->eid
;
210 ia64_acpiid_to_sapicid
[lsapic
->acpi_id
] =
211 (lsapic
->id
<< 8) | lsapic
->eid
;
220 acpi_parse_lapic_nmi(acpi_table_entry_header
* header
, const unsigned long end
)
222 struct acpi_table_lapic_nmi
*lacpi_nmi
;
224 lacpi_nmi
= (struct acpi_table_lapic_nmi
*)header
;
226 if (BAD_MADT_ENTRY(lacpi_nmi
, end
))
229 /* TBD: Support lapic_nmi entries */
234 acpi_parse_iosapic(acpi_table_entry_header
* header
, const unsigned long end
)
236 struct acpi_table_iosapic
*iosapic
;
238 iosapic
= (struct acpi_table_iosapic
*)header
;
240 if (BAD_MADT_ENTRY(iosapic
, end
))
243 return iosapic_init(iosapic
->address
, iosapic
->global_irq_base
);
247 acpi_parse_plat_int_src(acpi_table_entry_header
* header
,
248 const unsigned long end
)
250 struct acpi_table_plat_int_src
*plintsrc
;
253 plintsrc
= (struct acpi_table_plat_int_src
*)header
;
255 if (BAD_MADT_ENTRY(plintsrc
, end
))
259 * Get vector assignment for this interrupt, set attributes,
260 * and program the IOSAPIC routing table.
262 vector
= iosapic_register_platform_intr(plintsrc
->type
,
263 plintsrc
->global_irq
,
264 plintsrc
->iosapic_vector
,
267 (plintsrc
->flags
.polarity
==
268 1) ? IOSAPIC_POL_HIGH
:
270 (plintsrc
->flags
.trigger
==
274 platform_intr_list
[plintsrc
->type
] = vector
;
275 if (acpi_madt_rev
> 1) {
276 acpi_cpei_override
= plintsrc
->plint_flags
.cpei_override_flag
;
280 * Save the physical id, so we can check when its being removed
282 acpi_cpei_phys_cpuid
= ((plintsrc
->id
<< 8) | (plintsrc
->eid
)) & 0xffff;
287 unsigned int can_cpei_retarget(void)
289 extern int cpe_vector
;
290 extern unsigned int force_cpei_retarget
;
293 * Only if CPEI is supported and the override flag
294 * is present, otherwise return that its re-targettable
295 * if we are in polling mode.
297 if (cpe_vector
> 0) {
298 if (acpi_cpei_override
|| force_cpei_retarget
)
306 unsigned int is_cpu_cpei_target(unsigned int cpu
)
308 unsigned int logical_id
;
310 logical_id
= cpu_logical_id(acpi_cpei_phys_cpuid
);
312 if (logical_id
== cpu
)
318 void set_cpei_target_cpu(unsigned int cpu
)
320 acpi_cpei_phys_cpuid
= cpu_physical_id(cpu
);
323 unsigned int get_cpei_target_cpu(void)
325 return acpi_cpei_phys_cpuid
;
329 acpi_parse_int_src_ovr(acpi_table_entry_header
* header
,
330 const unsigned long end
)
332 struct acpi_table_int_src_ovr
*p
;
334 p
= (struct acpi_table_int_src_ovr
*)header
;
336 if (BAD_MADT_ENTRY(p
, end
))
339 iosapic_override_isa_irq(p
->bus_irq
, p
->global_irq
,
340 (p
->flags
.polarity
==
341 1) ? IOSAPIC_POL_HIGH
: IOSAPIC_POL_LOW
,
343 1) ? IOSAPIC_EDGE
: IOSAPIC_LEVEL
);
348 acpi_parse_nmi_src(acpi_table_entry_header
* header
, const unsigned long end
)
350 struct acpi_table_nmi_src
*nmi_src
;
352 nmi_src
= (struct acpi_table_nmi_src
*)header
;
354 if (BAD_MADT_ENTRY(nmi_src
, end
))
357 /* TBD: Support nimsrc entries */
361 static void __init
acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
363 if (!strncmp(oem_id
, "IBM", 3) && (!strncmp(oem_table_id
, "SERMOW", 6))) {
366 * Unfortunately ITC_DRIFT is not yet part of the
367 * official SAL spec, so the ITC_DRIFT bit is not
368 * set by the BIOS on this hardware.
370 sal_platform_features
|= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT
;
376 static int __init
acpi_parse_madt(unsigned long phys_addr
, unsigned long size
)
378 if (!phys_addr
|| !size
)
381 acpi_madt
= (struct acpi_table_madt
*)__va(phys_addr
);
383 acpi_madt_rev
= acpi_madt
->header
.revision
;
385 /* remember the value for reference after free_initmem() */
386 #ifdef CONFIG_ITANIUM
387 has_8259
= 1; /* Firmware on old Itanium systems is broken */
389 has_8259
= acpi_madt
->flags
.pcat_compat
;
391 iosapic_system_init(has_8259
);
393 /* Get base address of IPI Message Block */
395 if (acpi_madt
->lapic_address
)
396 ipi_base_addr
= ioremap(acpi_madt
->lapic_address
, 0);
398 printk(KERN_INFO PREFIX
"Local APIC address %p\n", ipi_base_addr
);
400 acpi_madt_oem_check(acpi_madt
->header
.oem_id
,
401 acpi_madt
->header
.oem_table_id
);
406 #ifdef CONFIG_ACPI_NUMA
410 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
412 static int __initdata srat_num_cpus
; /* number of cpus */
413 static u32 __devinitdata pxm_flag
[PXM_FLAG_LEN
];
414 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
415 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
416 /* maps to convert between proximity domain and logical node ID */
417 int __devinitdata pxm_to_nid_map
[MAX_PXM_DOMAINS
];
418 int __initdata nid_to_pxm_map
[MAX_NUMNODES
];
419 static struct acpi_table_slit __initdata
*slit_table
;
422 * ACPI 2.0 SLIT (System Locality Information Table)
423 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
425 void __init
acpi_numa_slit_init(struct acpi_table_slit
*slit
)
429 len
= sizeof(struct acpi_table_header
) + 8
430 + slit
->localities
* slit
->localities
;
431 if (slit
->header
.length
!= len
) {
433 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
434 len
, slit
->header
.length
);
435 memset(numa_slit
, 10, sizeof(numa_slit
));
442 acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity
*pa
)
444 /* record this node in proximity bitmap */
445 pxm_bit_set(pa
->proximity_domain
);
447 node_cpuid
[srat_num_cpus
].phys_id
=
448 (pa
->apic_id
<< 8) | (pa
->lsapic_eid
);
449 /* nid should be overridden as logical node id later */
450 node_cpuid
[srat_num_cpus
].nid
= pa
->proximity_domain
;
455 acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity
*ma
)
457 unsigned long paddr
, size
;
459 struct node_memblk_s
*p
, *q
, *pend
;
461 pxm
= ma
->proximity_domain
;
463 /* fill node memory chunk structure */
464 paddr
= ma
->base_addr_hi
;
465 paddr
= (paddr
<< 32) | ma
->base_addr_lo
;
466 size
= ma
->length_hi
;
467 size
= (size
<< 32) | ma
->length_lo
;
469 /* Ignore disabled entries */
470 if (!ma
->flags
.enabled
)
473 /* record this node in proximity bitmap */
476 /* Insertion sort based on base address */
477 pend
= &node_memblk
[num_node_memblks
];
478 for (p
= &node_memblk
[0]; p
< pend
; p
++) {
479 if (paddr
< p
->start_paddr
)
483 for (q
= pend
- 1; q
>= p
; q
--)
486 p
->start_paddr
= paddr
;
492 void __init
acpi_numa_arch_fixup(void)
494 int i
, j
, node_from
, node_to
;
496 /* If there's no SRAT, fix the phys_id and mark node 0 online */
497 if (srat_num_cpus
== 0) {
499 node_cpuid
[0].phys_id
= hard_smp_processor_id();
504 * MCD - This can probably be dropped now. No need for pxm ID to node ID
505 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
507 /* calculate total number of nodes in system from PXM bitmap */
508 memset(pxm_to_nid_map
, -1, sizeof(pxm_to_nid_map
));
509 memset(nid_to_pxm_map
, -1, sizeof(nid_to_pxm_map
));
510 nodes_clear(node_online_map
);
511 for (i
= 0; i
< MAX_PXM_DOMAINS
; i
++) {
512 if (pxm_bit_test(i
)) {
513 int nid
= num_online_nodes();
514 pxm_to_nid_map
[i
] = nid
;
515 nid_to_pxm_map
[nid
] = i
;
516 node_set_online(nid
);
520 /* set logical node id in memory chunk structure */
521 for (i
= 0; i
< num_node_memblks
; i
++)
522 node_memblk
[i
].nid
= pxm_to_nid_map
[node_memblk
[i
].nid
];
524 /* assign memory bank numbers for each chunk on each node */
525 for_each_online_node(i
) {
529 for (j
= 0; j
< num_node_memblks
; j
++)
530 if (node_memblk
[j
].nid
== i
)
531 node_memblk
[j
].bank
= bank
++;
534 /* set logical node id in cpu structure */
535 for (i
= 0; i
< srat_num_cpus
; i
++)
536 node_cpuid
[i
].nid
= pxm_to_nid_map
[node_cpuid
[i
].nid
];
538 printk(KERN_INFO
"Number of logical nodes in system = %d\n",
540 printk(KERN_INFO
"Number of memory chunks in system = %d\n",
545 memset(numa_slit
, -1, sizeof(numa_slit
));
546 for (i
= 0; i
< slit_table
->localities
; i
++) {
547 if (!pxm_bit_test(i
))
549 node_from
= pxm_to_nid_map
[i
];
550 for (j
= 0; j
< slit_table
->localities
; j
++) {
551 if (!pxm_bit_test(j
))
553 node_to
= pxm_to_nid_map
[j
];
554 node_distance(node_from
, node_to
) =
555 slit_table
->entry
[i
* slit_table
->localities
+ j
];
560 printk("ACPI 2.0 SLIT locality table:\n");
561 for_each_online_node(i
) {
562 for_each_online_node(j
)
563 printk("%03d ", node_distance(i
, j
));
568 #endif /* CONFIG_ACPI_NUMA */
571 * success: return IRQ number (>=0)
572 * failure: return < 0
574 int acpi_register_gsi(u32 gsi
, int edge_level
, int active_high_low
)
576 if (has_8259
&& gsi
< 16)
577 return isa_irq_to_vector(gsi
);
579 return iosapic_register_intr(gsi
,
581 ACPI_ACTIVE_HIGH
) ? IOSAPIC_POL_HIGH
:
584 ACPI_EDGE_SENSITIVE
) ? IOSAPIC_EDGE
:
588 EXPORT_SYMBOL(acpi_register_gsi
);
590 void acpi_unregister_gsi(u32 gsi
)
592 iosapic_unregister_intr(gsi
);
595 EXPORT_SYMBOL(acpi_unregister_gsi
);
597 static int __init
acpi_parse_fadt(unsigned long phys_addr
, unsigned long size
)
599 struct acpi_table_header
*fadt_header
;
600 struct fadt_descriptor_rev2
*fadt
;
602 if (!phys_addr
|| !size
)
605 fadt_header
= (struct acpi_table_header
*)__va(phys_addr
);
606 if (fadt_header
->revision
!= 3)
607 return -ENODEV
; /* Only deal with ACPI 2.0 FADT */
609 fadt
= (struct fadt_descriptor_rev2
*)fadt_header
;
611 if (!(fadt
->iapc_boot_arch
& BAF_8042_KEYBOARD_CONTROLLER
))
612 acpi_kbd_controller_present
= 0;
614 if (fadt
->iapc_boot_arch
& BAF_LEGACY_DEVICES
)
615 acpi_legacy_devices
= 1;
617 acpi_register_gsi(fadt
->sci_int
, ACPI_LEVEL_SENSITIVE
, ACPI_ACTIVE_LOW
);
621 unsigned long __init
acpi_find_rsdp(void)
623 unsigned long rsdp_phys
= 0;
626 rsdp_phys
= __pa(efi
.acpi20
);
628 printk(KERN_WARNING PREFIX
629 "v1.0/r0.71 tables no longer supported\n");
633 int __init
acpi_boot_init(void)
639 * Parse the Multiple APIC Description Table (MADT), if exists.
640 * Note that this table provides platform SMP configuration
641 * information -- the successor to MPS tables.
644 if (acpi_table_parse(ACPI_APIC
, acpi_parse_madt
) < 1) {
645 printk(KERN_ERR PREFIX
"Can't find MADT\n");
651 if (acpi_table_parse_madt
652 (ACPI_MADT_LAPIC_ADDR_OVR
, acpi_parse_lapic_addr_ovr
, 0) < 0)
653 printk(KERN_ERR PREFIX
654 "Error parsing LAPIC address override entry\n");
656 if (acpi_table_parse_madt(ACPI_MADT_LSAPIC
, acpi_parse_lsapic
, NR_CPUS
)
658 printk(KERN_ERR PREFIX
659 "Error parsing MADT - no LAPIC entries\n");
661 if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI
, acpi_parse_lapic_nmi
, 0)
663 printk(KERN_ERR PREFIX
"Error parsing LAPIC NMI entry\n");
667 if (acpi_table_parse_madt
668 (ACPI_MADT_IOSAPIC
, acpi_parse_iosapic
, NR_IOSAPICS
) < 1)
669 printk(KERN_ERR PREFIX
670 "Error parsing MADT - no IOSAPIC entries\n");
672 /* System-Level Interrupt Routing */
674 if (acpi_table_parse_madt
675 (ACPI_MADT_PLAT_INT_SRC
, acpi_parse_plat_int_src
,
676 ACPI_MAX_PLATFORM_INTERRUPTS
) < 0)
677 printk(KERN_ERR PREFIX
678 "Error parsing platform interrupt source entry\n");
680 if (acpi_table_parse_madt
681 (ACPI_MADT_INT_SRC_OVR
, acpi_parse_int_src_ovr
, 0) < 0)
682 printk(KERN_ERR PREFIX
683 "Error parsing interrupt source overrides entry\n");
685 if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC
, acpi_parse_nmi_src
, 0) < 0)
686 printk(KERN_ERR PREFIX
"Error parsing NMI SRC entry\n");
690 * FADT says whether a legacy keyboard controller is present.
691 * The FADT also contains an SCI_INT line, by which the system
692 * gets interrupts such as power and sleep buttons. If it's not
693 * on a Legacy interrupt, it needs to be setup.
695 if (acpi_table_parse(ACPI_FADT
, acpi_parse_fadt
) < 1)
696 printk(KERN_ERR PREFIX
"Can't find FADT\n");
699 if (available_cpus
== 0) {
700 printk(KERN_INFO
"ACPI: Found 0 CPUS; assuming 1\n");
701 printk(KERN_INFO
"CPU 0 (0x%04x)", hard_smp_processor_id());
702 smp_boot_data
.cpu_phys_id
[available_cpus
] =
703 hard_smp_processor_id();
704 available_cpus
= 1; /* We've got at least one of these, no? */
706 smp_boot_data
.cpu_count
= available_cpus
;
709 # ifdef CONFIG_ACPI_NUMA
710 if (srat_num_cpus
== 0) {
712 for (cpu
= 0; cpu
< smp_boot_data
.cpu_count
; cpu
++)
713 if (smp_boot_data
.cpu_phys_id
[cpu
] !=
714 hard_smp_processor_id())
715 node_cpuid
[i
++].phys_id
=
716 smp_boot_data
.cpu_phys_id
[cpu
];
720 #ifdef CONFIG_ACPI_NUMA
721 build_cpu_to_node_map();
723 /* Make boot-up look pretty */
724 printk(KERN_INFO
"%d CPUs available, %d CPUs total\n", available_cpus
,
729 int acpi_gsi_to_irq(u32 gsi
, unsigned int *irq
)
733 if (has_8259
&& gsi
< 16)
734 *irq
= isa_irq_to_vector(gsi
);
736 vector
= gsi_to_vector(gsi
);
746 * ACPI based hotplug CPU support
748 #ifdef CONFIG_ACPI_HOTPLUG_CPU
750 int acpi_map_cpu2node(acpi_handle handle
, int cpu
, long physid
)
752 #ifdef CONFIG_ACPI_NUMA
755 pxm_id
= acpi_get_pxm(handle
);
758 * Assuming that the container driver would have set the proximity
759 * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag
761 node_cpuid
[cpu
].nid
= (pxm_id
< 0) ? 0 : pxm_to_nid_map
[pxm_id
];
763 node_cpuid
[cpu
].phys_id
= physid
;
768 int acpi_map_lsapic(acpi_handle handle
, int *pcpu
)
770 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
771 union acpi_object
*obj
;
772 struct acpi_table_lsapic
*lsapic
;
777 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
780 if (!buffer
.length
|| !buffer
.pointer
)
783 obj
= buffer
.pointer
;
784 if (obj
->type
!= ACPI_TYPE_BUFFER
||
785 obj
->buffer
.length
< sizeof(*lsapic
)) {
786 acpi_os_free(buffer
.pointer
);
790 lsapic
= (struct acpi_table_lsapic
*)obj
->buffer
.pointer
;
792 if ((lsapic
->header
.type
!= ACPI_MADT_LSAPIC
) ||
793 (!lsapic
->flags
.enabled
)) {
794 acpi_os_free(buffer
.pointer
);
798 physid
= ((lsapic
->id
<< 8) | (lsapic
->eid
));
800 acpi_os_free(buffer
.pointer
);
801 buffer
.length
= ACPI_ALLOCATE_BUFFER
;
802 buffer
.pointer
= NULL
;
804 cpus_complement(tmp_map
, cpu_present_map
);
805 cpu
= first_cpu(tmp_map
);
809 acpi_map_cpu2node(handle
, cpu
, physid
);
811 cpu_set(cpu
, cpu_present_map
);
812 ia64_cpu_to_sapicid
[cpu
] = physid
;
813 ia64_acpiid_to_sapicid
[lsapic
->acpi_id
] = ia64_cpu_to_sapicid
[cpu
];
819 EXPORT_SYMBOL(acpi_map_lsapic
);
821 int acpi_unmap_lsapic(int cpu
)
825 for (i
= 0; i
< MAX_SAPICS
; i
++) {
826 if (ia64_acpiid_to_sapicid
[i
] == ia64_cpu_to_sapicid
[cpu
]) {
827 ia64_acpiid_to_sapicid
[i
] = -1;
831 ia64_cpu_to_sapicid
[cpu
] = -1;
832 cpu_clear(cpu
, cpu_present_map
);
834 #ifdef CONFIG_ACPI_NUMA
835 /* NUMA specific cleanup's */
841 EXPORT_SYMBOL(acpi_unmap_lsapic
);
842 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
844 #ifdef CONFIG_ACPI_NUMA
845 static acpi_status __devinit
846 acpi_map_iosapic(acpi_handle handle
, u32 depth
, void *context
, void **ret
)
848 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
849 union acpi_object
*obj
;
850 struct acpi_table_iosapic
*iosapic
;
851 unsigned int gsi_base
;
854 /* Only care about objects w/ a method that returns the MADT */
855 if (ACPI_FAILURE(acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
)))
858 if (!buffer
.length
|| !buffer
.pointer
)
861 obj
= buffer
.pointer
;
862 if (obj
->type
!= ACPI_TYPE_BUFFER
||
863 obj
->buffer
.length
< sizeof(*iosapic
)) {
864 acpi_os_free(buffer
.pointer
);
868 iosapic
= (struct acpi_table_iosapic
*)obj
->buffer
.pointer
;
870 if (iosapic
->header
.type
!= ACPI_MADT_IOSAPIC
) {
871 acpi_os_free(buffer
.pointer
);
875 gsi_base
= iosapic
->global_irq_base
;
877 acpi_os_free(buffer
.pointer
);
880 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
881 * us which node to associate this with.
883 pxm
= acpi_get_pxm(handle
);
887 node
= pxm_to_nid_map
[pxm
];
889 if (node
>= MAX_NUMNODES
|| !node_online(node
) ||
890 cpus_empty(node_to_cpumask(node
)))
893 /* We know a gsi to node mapping! */
894 map_iosapic_to_node(gsi_base
, node
);
899 acpi_map_iosapics (void)
901 acpi_get_devices(NULL
, acpi_map_iosapic
, NULL
, NULL
);
905 fs_initcall(acpi_map_iosapics
);
906 #endif /* CONFIG_ACPI_NUMA */
908 int acpi_register_ioapic(acpi_handle handle
, u64 phys_addr
, u32 gsi_base
)
912 if ((err
= iosapic_init(phys_addr
, gsi_base
)))
915 #ifdef CONFIG_ACPI_NUMA
916 acpi_map_iosapic(handle
, 0, NULL
, NULL
);
917 #endif /* CONFIG_ACPI_NUMA */
922 EXPORT_SYMBOL(acpi_register_ioapic
);
924 int acpi_unregister_ioapic(acpi_handle handle
, u32 gsi_base
)
926 return iosapic_remove(gsi_base
);
929 EXPORT_SYMBOL(acpi_unregister_ioapic
);
931 #endif /* CONFIG_ACPI */