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 char acpi_kbd_controller_present = 1;
68 unsigned char acpi_legacy_devices;
70 unsigned int acpi_cpei_override;
71 unsigned int acpi_cpei_phys_cpuid;
73 #define MAX_SAPICS 256
74 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] = {[0 ... MAX_SAPICS - 1] = -1 };
76 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
78 const char *acpi_get_sysname(void)
80 #ifdef CONFIG_IA64_GENERIC
81 unsigned long rsdp_phys;
82 struct acpi20_table_rsdp *rsdp;
83 struct acpi_table_xsdt *xsdt;
84 struct acpi_table_header *hdr;
86 rsdp_phys = acpi_find_rsdp();
89 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
93 rsdp = (struct acpi20_table_rsdp *)__va(rsdp_phys);
94 if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
96 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
100 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_address);
102 if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
104 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
108 if (!strcmp(hdr->oem_id, "HP")) {
110 } else if (!strcmp(hdr->oem_id, "SGI")) {
116 # if defined (CONFIG_IA64_HP_SIM)
118 # elif defined (CONFIG_IA64_HP_ZX1)
120 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
121 return "hpzx1_swiotlb";
122 # elif defined (CONFIG_IA64_SGI_SN2)
124 # elif defined (CONFIG_IA64_DIG)
127 # error Unknown platform. Fix acpi.c.
134 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
136 /* Array to record platform interrupt vectors for generic interrupt routing. */
137 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
138 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
141 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
144 * Interrupt routing API for device drivers. Provides interrupt vector for
145 * a generic platform event. Currently only CPEI is implemented.
147 int acpi_request_vector(u32 int_type)
151 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
152 /* corrected platform error interrupt */
153 vector = platform_intr_list[int_type];
156 "acpi_request_vector(): invalid interrupt type\n");
160 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
162 return __va(phys_addr);
165 /* --------------------------------------------------------------------------
166 Boot-time Table Parsing
167 -------------------------------------------------------------------------- */
169 static int total_cpus __initdata;
170 static int available_cpus __initdata;
171 struct acpi_table_madt *acpi_madt __initdata;
175 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
176 const unsigned long end)
178 struct acpi_table_lapic_addr_ovr *lapic;
180 lapic = (struct acpi_table_lapic_addr_ovr *)header;
182 if (BAD_MADT_ENTRY(lapic, end))
185 if (lapic->address) {
186 iounmap(ipi_base_addr);
187 ipi_base_addr = ioremap(lapic->address, 0);
193 acpi_parse_lsapic(acpi_table_entry_header * header, const unsigned long end)
195 struct acpi_table_lsapic *lsapic;
197 lsapic = (struct acpi_table_lsapic *)header;
199 if (BAD_MADT_ENTRY(lsapic, end))
202 if (lsapic->flags.enabled) {
204 smp_boot_data.cpu_phys_id[available_cpus] =
205 (lsapic->id << 8) | lsapic->eid;
207 ia64_acpiid_to_sapicid[lsapic->acpi_id] =
208 (lsapic->id << 8) | lsapic->eid;
217 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
219 struct acpi_table_lapic_nmi *lacpi_nmi;
221 lacpi_nmi = (struct acpi_table_lapic_nmi *)header;
223 if (BAD_MADT_ENTRY(lacpi_nmi, end))
226 /* TBD: Support lapic_nmi entries */
231 acpi_parse_iosapic(acpi_table_entry_header * header, const unsigned long end)
233 struct acpi_table_iosapic *iosapic;
235 iosapic = (struct acpi_table_iosapic *)header;
237 if (BAD_MADT_ENTRY(iosapic, end))
240 return iosapic_init(iosapic->address, iosapic->global_irq_base);
243 static unsigned int __initdata acpi_madt_rev;
246 acpi_parse_plat_int_src(acpi_table_entry_header * header,
247 const unsigned long end)
249 struct acpi_table_plat_int_src *plintsrc;
252 plintsrc = (struct acpi_table_plat_int_src *)header;
254 if (BAD_MADT_ENTRY(plintsrc, end))
258 * Get vector assignment for this interrupt, set attributes,
259 * and program the IOSAPIC routing table.
261 vector = iosapic_register_platform_intr(plintsrc->type,
262 plintsrc->global_irq,
263 plintsrc->iosapic_vector,
266 (plintsrc->flags.polarity ==
267 1) ? IOSAPIC_POL_HIGH :
269 (plintsrc->flags.trigger ==
273 platform_intr_list[plintsrc->type] = vector;
274 if (acpi_madt_rev > 1) {
275 acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag;
279 * Save the physical id, so we can check when its being removed
281 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
286 #ifdef CONFIG_HOTPLUG_CPU
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);
324 unsigned int get_cpei_target_cpu(void)
326 return acpi_cpei_phys_cpuid;
330 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
331 const unsigned long end)
333 struct acpi_table_int_src_ovr *p;
335 p = (struct acpi_table_int_src_ovr *)header;
337 if (BAD_MADT_ENTRY(p, end))
340 iosapic_override_isa_irq(p->bus_irq, p->global_irq,
341 (p->flags.polarity ==
342 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
344 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
349 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
351 struct acpi_table_nmi_src *nmi_src;
353 nmi_src = (struct acpi_table_nmi_src *)header;
355 if (BAD_MADT_ENTRY(nmi_src, end))
358 /* TBD: Support nimsrc entries */
362 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
364 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
367 * Unfortunately ITC_DRIFT is not yet part of the
368 * official SAL spec, so the ITC_DRIFT bit is not
369 * set by the BIOS on this hardware.
371 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
377 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
379 if (!phys_addr || !size)
382 acpi_madt = (struct acpi_table_madt *)__va(phys_addr);
384 acpi_madt_rev = acpi_madt->header.revision;
386 /* remember the value for reference after free_initmem() */
387 #ifdef CONFIG_ITANIUM
388 has_8259 = 1; /* Firmware on old Itanium systems is broken */
390 has_8259 = acpi_madt->flags.pcat_compat;
392 iosapic_system_init(has_8259);
394 /* Get base address of IPI Message Block */
396 if (acpi_madt->lapic_address)
397 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
399 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
401 acpi_madt_oem_check(acpi_madt->header.oem_id,
402 acpi_madt->header.oem_table_id);
407 #ifdef CONFIG_ACPI_NUMA
411 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
413 static int __initdata srat_num_cpus; /* number of cpus */
414 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
415 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
416 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
417 static struct acpi_table_slit __initdata *slit_table;
419 static int get_processor_proximity_domain(struct acpi_table_processor_affinity *pa)
423 pxm = pa->proximity_domain;
424 if (ia64_platform_is("sn2"))
425 pxm += pa->reserved[0] << 8;
429 static int get_memory_proximity_domain(struct acpi_table_memory_affinity *ma)
433 pxm = ma->proximity_domain;
434 if (ia64_platform_is("sn2"))
435 pxm += ma->reserved1[0] << 8;
440 * ACPI 2.0 SLIT (System Locality Information Table)
441 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
443 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
447 len = sizeof(struct acpi_table_header) + 8
448 + slit->localities * slit->localities;
449 if (slit->header.length != len) {
451 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
452 len, slit->header.length);
453 memset(numa_slit, 10, sizeof(numa_slit));
460 acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa)
464 if (!pa->flags.enabled)
467 pxm = get_processor_proximity_domain(pa);
469 /* record this node in proximity bitmap */
472 node_cpuid[srat_num_cpus].phys_id =
473 (pa->apic_id << 8) | (pa->lsapic_eid);
474 /* nid should be overridden as logical node id later */
475 node_cpuid[srat_num_cpus].nid = pxm;
480 acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
482 unsigned long paddr, size;
484 struct node_memblk_s *p, *q, *pend;
486 pxm = get_memory_proximity_domain(ma);
488 /* fill node memory chunk structure */
489 paddr = ma->base_addr_hi;
490 paddr = (paddr << 32) | ma->base_addr_lo;
491 size = ma->length_hi;
492 size = (size << 32) | ma->length_lo;
494 /* Ignore disabled entries */
495 if (!ma->flags.enabled)
498 /* record this node in proximity bitmap */
501 /* Insertion sort based on base address */
502 pend = &node_memblk[num_node_memblks];
503 for (p = &node_memblk[0]; p < pend; p++) {
504 if (paddr < p->start_paddr)
508 for (q = pend - 1; q >= p; q--)
511 p->start_paddr = paddr;
517 void __init acpi_numa_arch_fixup(void)
519 int i, j, node_from, node_to;
521 /* If there's no SRAT, fix the phys_id and mark node 0 online */
522 if (srat_num_cpus == 0) {
524 node_cpuid[0].phys_id = hard_smp_processor_id();
529 * MCD - This can probably be dropped now. No need for pxm ID to node ID
530 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
532 nodes_clear(node_online_map);
533 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
534 if (pxm_bit_test(i)) {
535 int nid = acpi_map_pxm_to_node(i);
536 node_set_online(nid);
540 /* set logical node id in memory chunk structure */
541 for (i = 0; i < num_node_memblks; i++)
542 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
544 /* assign memory bank numbers for each chunk on each node */
545 for_each_online_node(i) {
549 for (j = 0; j < num_node_memblks; j++)
550 if (node_memblk[j].nid == i)
551 node_memblk[j].bank = bank++;
554 /* set logical node id in cpu structure */
555 for (i = 0; i < srat_num_cpus; i++)
556 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
558 printk(KERN_INFO "Number of logical nodes in system = %d\n",
560 printk(KERN_INFO "Number of memory chunks in system = %d\n",
565 memset(numa_slit, -1, sizeof(numa_slit));
566 for (i = 0; i < slit_table->localities; i++) {
567 if (!pxm_bit_test(i))
569 node_from = pxm_to_node(i);
570 for (j = 0; j < slit_table->localities; j++) {
571 if (!pxm_bit_test(j))
573 node_to = pxm_to_node(j);
574 node_distance(node_from, node_to) =
575 slit_table->entry[i * slit_table->localities + j];
580 printk("ACPI 2.0 SLIT locality table:\n");
581 for_each_online_node(i) {
582 for_each_online_node(j)
583 printk("%03d ", node_distance(i, j));
588 #endif /* CONFIG_ACPI_NUMA */
591 * success: return IRQ number (>=0)
592 * failure: return < 0
594 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
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 iosapic_unregister_intr(gsi);
615 EXPORT_SYMBOL(acpi_unregister_gsi);
617 static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size)
619 struct acpi_table_header *fadt_header;
620 struct fadt_descriptor *fadt;
622 if (!phys_addr || !size)
625 fadt_header = (struct acpi_table_header *)__va(phys_addr);
626 if (fadt_header->revision != 3)
627 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
629 fadt = (struct fadt_descriptor *)fadt_header;
631 if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
632 acpi_kbd_controller_present = 0;
634 if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
635 acpi_legacy_devices = 1;
637 acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
641 unsigned long __init acpi_find_rsdp(void)
643 unsigned long rsdp_phys = 0;
645 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
646 rsdp_phys = efi.acpi20;
647 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
648 printk(KERN_WARNING PREFIX
649 "v1.0/r0.71 tables no longer supported\n");
653 int __init acpi_boot_init(void)
659 * Parse the Multiple APIC Description Table (MADT), if exists.
660 * Note that this table provides platform SMP configuration
661 * information -- the successor to MPS tables.
664 if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
665 printk(KERN_ERR PREFIX "Can't find MADT\n");
671 if (acpi_table_parse_madt
672 (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
673 printk(KERN_ERR PREFIX
674 "Error parsing LAPIC address override entry\n");
676 if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS)
678 printk(KERN_ERR PREFIX
679 "Error parsing MADT - no LAPIC entries\n");
681 if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0)
683 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
687 if (acpi_table_parse_madt
688 (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
689 printk(KERN_ERR PREFIX
690 "Error parsing MADT - no IOSAPIC entries\n");
692 /* System-Level Interrupt Routing */
694 if (acpi_table_parse_madt
695 (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src,
696 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
697 printk(KERN_ERR PREFIX
698 "Error parsing platform interrupt source entry\n");
700 if (acpi_table_parse_madt
701 (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
702 printk(KERN_ERR PREFIX
703 "Error parsing interrupt source overrides entry\n");
705 if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
706 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
710 * FADT says whether a legacy keyboard controller is present.
711 * The FADT also contains an SCI_INT line, by which the system
712 * gets interrupts such as power and sleep buttons. If it's not
713 * on a Legacy interrupt, it needs to be setup.
715 if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
716 printk(KERN_ERR PREFIX "Can't find FADT\n");
719 if (available_cpus == 0) {
720 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
721 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
722 smp_boot_data.cpu_phys_id[available_cpus] =
723 hard_smp_processor_id();
724 available_cpus = 1; /* We've got at least one of these, no? */
726 smp_boot_data.cpu_count = available_cpus;
729 # ifdef CONFIG_ACPI_NUMA
730 if (srat_num_cpus == 0) {
732 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
733 if (smp_boot_data.cpu_phys_id[cpu] !=
734 hard_smp_processor_id())
735 node_cpuid[i++].phys_id =
736 smp_boot_data.cpu_phys_id[cpu];
740 #ifdef CONFIG_ACPI_NUMA
741 build_cpu_to_node_map();
743 /* Make boot-up look pretty */
744 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
749 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
753 if (has_8259 && gsi < 16)
754 *irq = isa_irq_to_vector(gsi);
756 vector = gsi_to_vector(gsi);
766 * ACPI based hotplug CPU support
768 #ifdef CONFIG_ACPI_HOTPLUG_CPU
770 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
772 #ifdef CONFIG_ACPI_NUMA
775 pxm_id = acpi_get_pxm(handle);
778 * Assuming that the container driver would have set the proximity
779 * domain and would have initialized pxm_to_node(pxm_id) && pxm_flag
781 node_cpuid[cpu].nid = (pxm_id < 0) ? 0 : pxm_to_node(pxm_id);
783 node_cpuid[cpu].phys_id = physid;
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 acpi_os_free(buffer.pointer);
863 lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
865 if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
866 (!lsapic->flags.enabled)) {
867 acpi_os_free(buffer.pointer);
871 physid = ((lsapic->id << 8) | (lsapic->eid));
873 acpi_os_free(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 acpi_os_free(buffer.pointer);
941 iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
943 if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
944 acpi_os_free(buffer.pointer);
948 gsi_base = iosapic->global_irq_base;
950 acpi_os_free(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 */