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 */