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>
56 #define BAD_MADT_ENTRY(entry, end) ( \
57 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
58 ((acpi_table_entry_header *)entry)->length < sizeof(*entry))
60 #define PREFIX "ACPI: "
62 void (*pm_idle) (void);
63 EXPORT_SYMBOL(pm_idle);
64 void (*pm_power_off) (void);
65 EXPORT_SYMBOL(pm_power_off);
67 unsigned int acpi_cpei_override;
68 unsigned int acpi_cpei_phys_cpuid;
70 #define MAX_SAPICS 256
71 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] = {[0 ... MAX_SAPICS - 1] = -1 };
73 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
75 const char *acpi_get_sysname(void)
77 #ifdef CONFIG_IA64_GENERIC
78 unsigned long rsdp_phys;
79 struct acpi20_table_rsdp *rsdp;
80 struct acpi_table_xsdt *xsdt;
81 struct acpi_table_header *hdr;
83 rsdp_phys = acpi_find_rsdp();
86 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
90 rsdp = (struct acpi20_table_rsdp *)__va(rsdp_phys);
91 if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
93 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
97 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_address);
99 if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
101 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
105 if (!strcmp(hdr->oem_id, "HP")) {
107 } else if (!strcmp(hdr->oem_id, "SGI")) {
113 # if defined (CONFIG_IA64_HP_SIM)
115 # elif defined (CONFIG_IA64_HP_ZX1)
117 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
118 return "hpzx1_swiotlb";
119 # elif defined (CONFIG_IA64_SGI_SN2)
121 # elif defined (CONFIG_IA64_DIG)
124 # error Unknown platform. Fix acpi.c.
131 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
133 /* Array to record platform interrupt vectors for generic interrupt routing. */
134 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
135 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
138 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
141 * Interrupt routing API for device drivers. Provides interrupt vector for
142 * a generic platform event. Currently only CPEI is implemented.
144 int acpi_request_vector(u32 int_type)
148 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
149 /* corrected platform error interrupt */
150 vector = platform_intr_list[int_type];
153 "acpi_request_vector(): invalid interrupt type\n");
157 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
159 return __va(phys_addr);
162 /* --------------------------------------------------------------------------
163 Boot-time Table Parsing
164 -------------------------------------------------------------------------- */
166 static int total_cpus __initdata;
167 static int available_cpus __initdata;
168 struct acpi_table_madt *acpi_madt __initdata;
172 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
173 const unsigned long end)
175 struct acpi_table_lapic_addr_ovr *lapic;
177 lapic = (struct acpi_table_lapic_addr_ovr *)header;
179 if (BAD_MADT_ENTRY(lapic, end))
182 if (lapic->address) {
183 iounmap(ipi_base_addr);
184 ipi_base_addr = ioremap(lapic->address, 0);
190 acpi_parse_lsapic(acpi_table_entry_header * header, const unsigned long end)
192 struct acpi_table_lsapic *lsapic;
194 lsapic = (struct acpi_table_lsapic *)header;
196 if (BAD_MADT_ENTRY(lsapic, end))
199 if (lsapic->flags.enabled) {
201 smp_boot_data.cpu_phys_id[available_cpus] =
202 (lsapic->id << 8) | lsapic->eid;
204 ia64_acpiid_to_sapicid[lsapic->acpi_id] =
205 (lsapic->id << 8) | lsapic->eid;
214 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
216 struct acpi_table_lapic_nmi *lacpi_nmi;
218 lacpi_nmi = (struct acpi_table_lapic_nmi *)header;
220 if (BAD_MADT_ENTRY(lacpi_nmi, end))
223 /* TBD: Support lapic_nmi entries */
228 acpi_parse_iosapic(acpi_table_entry_header * header, const unsigned long end)
230 struct acpi_table_iosapic *iosapic;
232 iosapic = (struct acpi_table_iosapic *)header;
234 if (BAD_MADT_ENTRY(iosapic, end))
237 return iosapic_init(iosapic->address, iosapic->global_irq_base);
240 static unsigned int __initdata acpi_madt_rev;
243 acpi_parse_plat_int_src(acpi_table_entry_header * header,
244 const unsigned long end)
246 struct acpi_table_plat_int_src *plintsrc;
249 plintsrc = (struct acpi_table_plat_int_src *)header;
251 if (BAD_MADT_ENTRY(plintsrc, end))
255 * Get vector assignment for this interrupt, set attributes,
256 * and program the IOSAPIC routing table.
258 vector = iosapic_register_platform_intr(plintsrc->type,
259 plintsrc->global_irq,
260 plintsrc->iosapic_vector,
263 (plintsrc->flags.polarity ==
264 1) ? IOSAPIC_POL_HIGH :
266 (plintsrc->flags.trigger ==
270 platform_intr_list[plintsrc->type] = vector;
271 if (acpi_madt_rev > 1) {
272 acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag;
276 * Save the physical id, so we can check when its being removed
278 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
283 #ifdef CONFIG_HOTPLUG_CPU
284 unsigned int can_cpei_retarget(void)
286 extern int cpe_vector;
287 extern unsigned int force_cpei_retarget;
290 * Only if CPEI is supported and the override flag
291 * is present, otherwise return that its re-targettable
292 * if we are in polling mode.
294 if (cpe_vector > 0) {
295 if (acpi_cpei_override || force_cpei_retarget)
303 unsigned int is_cpu_cpei_target(unsigned int cpu)
305 unsigned int logical_id;
307 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
309 if (logical_id == cpu)
315 void set_cpei_target_cpu(unsigned int cpu)
317 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
321 unsigned int get_cpei_target_cpu(void)
323 return acpi_cpei_phys_cpuid;
327 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
328 const unsigned long end)
330 struct acpi_table_int_src_ovr *p;
332 p = (struct acpi_table_int_src_ovr *)header;
334 if (BAD_MADT_ENTRY(p, end))
337 iosapic_override_isa_irq(p->bus_irq, p->global_irq,
338 (p->flags.polarity ==
339 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
341 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
346 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
348 struct acpi_table_nmi_src *nmi_src;
350 nmi_src = (struct acpi_table_nmi_src *)header;
352 if (BAD_MADT_ENTRY(nmi_src, end))
355 /* TBD: Support nimsrc entries */
359 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
361 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
364 * Unfortunately ITC_DRIFT is not yet part of the
365 * official SAL spec, so the ITC_DRIFT bit is not
366 * set by the BIOS on this hardware.
368 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
374 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
376 if (!phys_addr || !size)
379 acpi_madt = (struct acpi_table_madt *)__va(phys_addr);
381 acpi_madt_rev = acpi_madt->header.revision;
383 /* remember the value for reference after free_initmem() */
384 #ifdef CONFIG_ITANIUM
385 has_8259 = 1; /* Firmware on old Itanium systems is broken */
387 has_8259 = acpi_madt->flags.pcat_compat;
389 iosapic_system_init(has_8259);
391 /* Get base address of IPI Message Block */
393 if (acpi_madt->lapic_address)
394 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
396 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
398 acpi_madt_oem_check(acpi_madt->header.oem_id,
399 acpi_madt->header.oem_table_id);
404 #ifdef CONFIG_ACPI_NUMA
408 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
410 static int __initdata srat_num_cpus; /* number of cpus */
411 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
412 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
413 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
414 static struct acpi_table_slit __initdata *slit_table;
416 static int get_processor_proximity_domain(struct acpi_table_processor_affinity *pa)
420 pxm = pa->proximity_domain;
421 if (ia64_platform_is("sn2"))
422 pxm += pa->reserved[0] << 8;
426 static int get_memory_proximity_domain(struct acpi_table_memory_affinity *ma)
430 pxm = ma->proximity_domain;
431 if (ia64_platform_is("sn2"))
432 pxm += ma->reserved1[0] << 8;
437 * ACPI 2.0 SLIT (System Locality Information Table)
438 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
440 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
444 len = sizeof(struct acpi_table_header) + 8
445 + slit->localities * slit->localities;
446 if (slit->header.length != len) {
448 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
449 len, slit->header.length);
450 memset(numa_slit, 10, sizeof(numa_slit));
457 acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa)
461 if (!pa->flags.enabled)
464 pxm = get_processor_proximity_domain(pa);
466 /* record this node in proximity bitmap */
469 node_cpuid[srat_num_cpus].phys_id =
470 (pa->apic_id << 8) | (pa->lsapic_eid);
471 /* nid should be overridden as logical node id later */
472 node_cpuid[srat_num_cpus].nid = pxm;
477 acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
479 unsigned long paddr, size;
481 struct node_memblk_s *p, *q, *pend;
483 pxm = get_memory_proximity_domain(ma);
485 /* fill node memory chunk structure */
486 paddr = ma->base_addr_hi;
487 paddr = (paddr << 32) | ma->base_addr_lo;
488 size = ma->length_hi;
489 size = (size << 32) | ma->length_lo;
491 /* Ignore disabled entries */
492 if (!ma->flags.enabled)
495 /* record this node in proximity bitmap */
498 /* Insertion sort based on base address */
499 pend = &node_memblk[num_node_memblks];
500 for (p = &node_memblk[0]; p < pend; p++) {
501 if (paddr < p->start_paddr)
505 for (q = pend - 1; q >= p; q--)
508 p->start_paddr = paddr;
514 void __init acpi_numa_arch_fixup(void)
516 int i, j, node_from, node_to;
518 /* If there's no SRAT, fix the phys_id and mark node 0 online */
519 if (srat_num_cpus == 0) {
521 node_cpuid[0].phys_id = hard_smp_processor_id();
526 * MCD - This can probably be dropped now. No need for pxm ID to node ID
527 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
529 nodes_clear(node_online_map);
530 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
531 if (pxm_bit_test(i)) {
532 int nid = acpi_map_pxm_to_node(i);
533 node_set_online(nid);
537 /* set logical node id in memory chunk structure */
538 for (i = 0; i < num_node_memblks; i++)
539 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
541 /* assign memory bank numbers for each chunk on each node */
542 for_each_online_node(i) {
546 for (j = 0; j < num_node_memblks; j++)
547 if (node_memblk[j].nid == i)
548 node_memblk[j].bank = bank++;
551 /* set logical node id in cpu structure */
552 for (i = 0; i < srat_num_cpus; i++)
553 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
555 printk(KERN_INFO "Number of logical nodes in system = %d\n",
557 printk(KERN_INFO "Number of memory chunks in system = %d\n",
562 memset(numa_slit, -1, sizeof(numa_slit));
563 for (i = 0; i < slit_table->localities; i++) {
564 if (!pxm_bit_test(i))
566 node_from = pxm_to_node(i);
567 for (j = 0; j < slit_table->localities; j++) {
568 if (!pxm_bit_test(j))
570 node_to = pxm_to_node(j);
571 node_distance(node_from, node_to) =
572 slit_table->entry[i * slit_table->localities + j];
577 printk("ACPI 2.0 SLIT locality table:\n");
578 for_each_online_node(i) {
579 for_each_online_node(j)
580 printk("%03d ", node_distance(i, j));
585 #endif /* CONFIG_ACPI_NUMA */
588 * success: return IRQ number (>=0)
589 * failure: return < 0
591 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
593 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
596 if (has_8259 && gsi < 16)
597 return isa_irq_to_vector(gsi);
599 return iosapic_register_intr(gsi,
601 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
604 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
608 EXPORT_SYMBOL(acpi_register_gsi);
610 void acpi_unregister_gsi(u32 gsi)
612 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
615 iosapic_unregister_intr(gsi);
618 EXPORT_SYMBOL(acpi_unregister_gsi);
620 static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size)
622 struct acpi_table_header *fadt_header;
623 struct fadt_descriptor *fadt;
625 if (!phys_addr || !size)
628 fadt_header = (struct acpi_table_header *)__va(phys_addr);
629 if (fadt_header->revision != 3)
630 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
632 fadt = (struct fadt_descriptor *)fadt_header;
634 acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
638 unsigned long __init acpi_find_rsdp(void)
640 unsigned long rsdp_phys = 0;
642 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
643 rsdp_phys = efi.acpi20;
644 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
645 printk(KERN_WARNING PREFIX
646 "v1.0/r0.71 tables no longer supported\n");
650 int __init acpi_boot_init(void)
656 * Parse the Multiple APIC Description Table (MADT), if exists.
657 * Note that this table provides platform SMP configuration
658 * information -- the successor to MPS tables.
661 if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
662 printk(KERN_ERR PREFIX "Can't find MADT\n");
668 if (acpi_table_parse_madt
669 (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
670 printk(KERN_ERR PREFIX
671 "Error parsing LAPIC address override entry\n");
673 if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS)
675 printk(KERN_ERR PREFIX
676 "Error parsing MADT - no LAPIC entries\n");
678 if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0)
680 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
684 if (acpi_table_parse_madt
685 (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
686 printk(KERN_ERR PREFIX
687 "Error parsing MADT - no IOSAPIC entries\n");
689 /* System-Level Interrupt Routing */
691 if (acpi_table_parse_madt
692 (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src,
693 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
694 printk(KERN_ERR PREFIX
695 "Error parsing platform interrupt source entry\n");
697 if (acpi_table_parse_madt
698 (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
699 printk(KERN_ERR PREFIX
700 "Error parsing interrupt source overrides entry\n");
702 if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
703 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
707 * FADT says whether a legacy keyboard controller is present.
708 * The FADT also contains an SCI_INT line, by which the system
709 * gets interrupts such as power and sleep buttons. If it's not
710 * on a Legacy interrupt, it needs to be setup.
712 if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
713 printk(KERN_ERR PREFIX "Can't find FADT\n");
716 if (available_cpus == 0) {
717 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
718 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
719 smp_boot_data.cpu_phys_id[available_cpus] =
720 hard_smp_processor_id();
721 available_cpus = 1; /* We've got at least one of these, no? */
723 smp_boot_data.cpu_count = available_cpus;
726 # ifdef CONFIG_ACPI_NUMA
727 if (srat_num_cpus == 0) {
729 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
730 if (smp_boot_data.cpu_phys_id[cpu] !=
731 hard_smp_processor_id())
732 node_cpuid[i++].phys_id =
733 smp_boot_data.cpu_phys_id[cpu];
737 #ifdef CONFIG_ACPI_NUMA
738 build_cpu_to_node_map();
740 /* Make boot-up look pretty */
741 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
746 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
750 if (has_8259 && gsi < 16)
751 *irq = isa_irq_to_vector(gsi);
753 vector = gsi_to_vector(gsi);
763 * ACPI based hotplug CPU support
765 #ifdef CONFIG_ACPI_HOTPLUG_CPU
767 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
769 #ifdef CONFIG_ACPI_NUMA
773 pxm_id = acpi_get_pxm(handle);
775 * We don't have cpu-only-node hotadd. But if the system equips
776 * SRAT table, pxm is already found and node is ready.
777 * So, just pxm_to_nid(pxm) is OK.
778 * This code here is for the system which doesn't have full SRAT
779 * table for possible cpus.
781 nid = acpi_map_pxm_to_node(pxm_id);
782 node_cpuid[cpu].phys_id = physid;
783 node_cpuid[cpu].nid = nid;
788 int additional_cpus __initdata = -1;
790 static __init int setup_additional_cpus(char *s)
793 additional_cpus = simple_strtol(s, NULL, 0);
798 early_param("additional_cpus", setup_additional_cpus);
801 * cpu_possible_map should be static, it cannot change as cpu's
802 * are onlined, or offlined. The reason is per-cpu data-structures
803 * are allocated by some modules at init time, and dont expect to
804 * do this dynamically on cpu arrival/departure.
805 * cpu_present_map on the other hand can change dynamically.
806 * In case when cpu_hotplug is not compiled, then we resort to current
807 * behaviour, which is cpu_possible == cpu_present.
810 * Three ways to find out the number of additional hotplug CPUs:
811 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
812 * - The user can overwrite it with additional_cpus=NUM
813 * - Otherwise don't reserve additional CPUs.
815 __init void prefill_possible_map(void)
818 int possible, disabled_cpus;
820 disabled_cpus = total_cpus - available_cpus;
822 if (additional_cpus == -1) {
823 if (disabled_cpus > 0)
824 additional_cpus = disabled_cpus;
829 possible = available_cpus + additional_cpus;
831 if (possible > NR_CPUS)
834 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
835 possible, max((possible - available_cpus), 0));
837 for (i = 0; i < possible; i++)
838 cpu_set(i, cpu_possible_map);
841 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
843 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
844 union acpi_object *obj;
845 struct acpi_table_lsapic *lsapic;
850 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
853 if (!buffer.length || !buffer.pointer)
856 obj = buffer.pointer;
857 if (obj->type != ACPI_TYPE_BUFFER ||
858 obj->buffer.length < sizeof(*lsapic)) {
859 kfree(buffer.pointer);
863 lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
865 if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
866 (!lsapic->flags.enabled)) {
867 kfree(buffer.pointer);
871 physid = ((lsapic->id << 8) | (lsapic->eid));
873 kfree(buffer.pointer);
874 buffer.length = ACPI_ALLOCATE_BUFFER;
875 buffer.pointer = NULL;
877 cpus_complement(tmp_map, cpu_present_map);
878 cpu = first_cpu(tmp_map);
882 acpi_map_cpu2node(handle, cpu, physid);
884 cpu_set(cpu, cpu_present_map);
885 ia64_cpu_to_sapicid[cpu] = physid;
886 ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu];
892 EXPORT_SYMBOL(acpi_map_lsapic);
894 int acpi_unmap_lsapic(int cpu)
898 for (i = 0; i < MAX_SAPICS; i++) {
899 if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) {
900 ia64_acpiid_to_sapicid[i] = -1;
904 ia64_cpu_to_sapicid[cpu] = -1;
905 cpu_clear(cpu, cpu_present_map);
907 #ifdef CONFIG_ACPI_NUMA
908 /* NUMA specific cleanup's */
914 EXPORT_SYMBOL(acpi_unmap_lsapic);
915 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
917 #ifdef CONFIG_ACPI_NUMA
918 static acpi_status __devinit
919 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
921 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
922 union acpi_object *obj;
923 struct acpi_table_iosapic *iosapic;
924 unsigned int gsi_base;
927 /* Only care about objects w/ a method that returns the MADT */
928 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
931 if (!buffer.length || !buffer.pointer)
934 obj = buffer.pointer;
935 if (obj->type != ACPI_TYPE_BUFFER ||
936 obj->buffer.length < sizeof(*iosapic)) {
937 kfree(buffer.pointer);
941 iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
943 if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
944 kfree(buffer.pointer);
948 gsi_base = iosapic->global_irq_base;
950 kfree(buffer.pointer);
953 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
954 * us which node to associate this with.
956 pxm = acpi_get_pxm(handle);
960 node = pxm_to_node(pxm);
962 if (node >= MAX_NUMNODES || !node_online(node) ||
963 cpus_empty(node_to_cpumask(node)))
966 /* We know a gsi to node mapping! */
967 map_iosapic_to_node(gsi_base, node);
972 acpi_map_iosapics (void)
974 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
978 fs_initcall(acpi_map_iosapics);
979 #endif /* CONFIG_ACPI_NUMA */
981 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
985 if ((err = iosapic_init(phys_addr, gsi_base)))
988 #ifdef CONFIG_ACPI_NUMA
989 acpi_map_iosapic(handle, 0, NULL, NULL);
990 #endif /* CONFIG_ACPI_NUMA */
995 EXPORT_SYMBOL(acpi_register_ioapic);
997 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
999 return iosapic_remove(gsi_base);
1002 EXPORT_SYMBOL(acpi_unregister_ioapic);
1004 #endif /* CONFIG_ACPI */