thinkpad-acpi: drop HKEY event 0x5010
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / ia64 / kernel / acpi.c
blobbaec6f00f7f3feee71c5110b01f12b5c8b3f4fda
1 /*
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>
47 #include <asm/io.h>
48 #include <asm/iosapic.h>
49 #include <asm/machvec.h>
50 #include <asm/page.h>
51 #include <asm/system.h>
52 #include <asm/numa.h>
53 #include <asm/sal.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 u32 acpi_rsdt_forced;
69 unsigned int acpi_cpei_override;
70 unsigned int acpi_cpei_phys_cpuid;
72 unsigned long acpi_wakeup_address = 0;
74 #ifdef CONFIG_IA64_GENERIC
75 static unsigned long __init acpi_find_rsdp(void)
77 unsigned long rsdp_phys = 0;
79 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
80 rsdp_phys = efi.acpi20;
81 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
82 printk(KERN_WARNING PREFIX
83 "v1.0/r0.71 tables no longer supported\n");
84 return rsdp_phys;
86 #endif
88 const char __init *
89 acpi_get_sysname(void)
91 #ifdef CONFIG_IA64_GENERIC
92 unsigned long rsdp_phys;
93 struct acpi_table_rsdp *rsdp;
94 struct acpi_table_xsdt *xsdt;
95 struct acpi_table_header *hdr;
96 #ifdef CONFIG_DMAR
97 u64 i, nentries;
98 #endif
100 rsdp_phys = acpi_find_rsdp();
101 if (!rsdp_phys) {
102 printk(KERN_ERR
103 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
104 return "dig";
107 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
108 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
109 printk(KERN_ERR
110 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
111 return "dig";
114 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
115 hdr = &xsdt->header;
116 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
117 printk(KERN_ERR
118 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
119 return "dig";
122 if (!strcmp(hdr->oem_id, "HP")) {
123 return "hpzx1";
124 } else if (!strcmp(hdr->oem_id, "SGI")) {
125 if (!strcmp(hdr->oem_table_id + 4, "UV"))
126 return "uv";
127 else
128 return "sn2";
129 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
130 return "xen";
133 #ifdef CONFIG_DMAR
134 /* Look for Intel IOMMU */
135 nentries = (hdr->length - sizeof(*hdr)) /
136 sizeof(xsdt->table_offset_entry[0]);
137 for (i = 0; i < nentries; i++) {
138 hdr = __va(xsdt->table_offset_entry[i]);
139 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
140 sizeof(ACPI_SIG_DMAR) - 1) == 0)
141 return "dig_vtd";
143 #endif
145 return "dig";
146 #else
147 # if defined (CONFIG_IA64_HP_SIM)
148 return "hpsim";
149 # elif defined (CONFIG_IA64_HP_ZX1)
150 return "hpzx1";
151 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
152 return "hpzx1_swiotlb";
153 # elif defined (CONFIG_IA64_SGI_SN2)
154 return "sn2";
155 # elif defined (CONFIG_IA64_SGI_UV)
156 return "uv";
157 # elif defined (CONFIG_IA64_DIG)
158 return "dig";
159 # elif defined (CONFIG_IA64_XEN_GUEST)
160 return "xen";
161 # elif defined(CONFIG_IA64_DIG_VTD)
162 return "dig_vtd";
163 # else
164 # error Unknown platform. Fix acpi.c.
165 # endif
166 #endif
169 #ifdef CONFIG_ACPI
171 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
173 /* Array to record platform interrupt vectors for generic interrupt routing. */
174 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
175 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
178 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
181 * Interrupt routing API for device drivers. Provides interrupt vector for
182 * a generic platform event. Currently only CPEI is implemented.
184 int acpi_request_vector(u32 int_type)
186 int vector = -1;
188 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
189 /* corrected platform error interrupt */
190 vector = platform_intr_list[int_type];
191 } else
192 printk(KERN_ERR
193 "acpi_request_vector(): invalid interrupt type\n");
194 return vector;
197 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
199 return __va(phys_addr);
202 void __init __acpi_unmap_table(char *map, unsigned long size)
206 /* --------------------------------------------------------------------------
207 Boot-time Table Parsing
208 -------------------------------------------------------------------------- */
210 static int available_cpus __initdata;
211 struct acpi_table_madt *acpi_madt __initdata;
212 static u8 has_8259;
214 static int __init
215 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
216 const unsigned long end)
218 struct acpi_madt_local_apic_override *lapic;
220 lapic = (struct acpi_madt_local_apic_override *)header;
222 if (BAD_MADT_ENTRY(lapic, end))
223 return -EINVAL;
225 if (lapic->address) {
226 iounmap(ipi_base_addr);
227 ipi_base_addr = ioremap(lapic->address, 0);
229 return 0;
232 static int __init
233 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
235 struct acpi_madt_local_sapic *lsapic;
237 lsapic = (struct acpi_madt_local_sapic *)header;
239 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
241 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
242 #ifdef CONFIG_SMP
243 smp_boot_data.cpu_phys_id[available_cpus] =
244 (lsapic->id << 8) | lsapic->eid;
245 #endif
246 ++available_cpus;
249 total_cpus++;
250 return 0;
253 static int __init
254 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
256 struct acpi_madt_local_apic_nmi *lacpi_nmi;
258 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
260 if (BAD_MADT_ENTRY(lacpi_nmi, end))
261 return -EINVAL;
263 /* TBD: Support lapic_nmi entries */
264 return 0;
267 static int __init
268 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
270 struct acpi_madt_io_sapic *iosapic;
272 iosapic = (struct acpi_madt_io_sapic *)header;
274 if (BAD_MADT_ENTRY(iosapic, end))
275 return -EINVAL;
277 return iosapic_init(iosapic->address, iosapic->global_irq_base);
280 static unsigned int __initdata acpi_madt_rev;
282 static int __init
283 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
284 const unsigned long end)
286 struct acpi_madt_interrupt_source *plintsrc;
287 int vector;
289 plintsrc = (struct acpi_madt_interrupt_source *)header;
291 if (BAD_MADT_ENTRY(plintsrc, end))
292 return -EINVAL;
295 * Get vector assignment for this interrupt, set attributes,
296 * and program the IOSAPIC routing table.
298 vector = iosapic_register_platform_intr(plintsrc->type,
299 plintsrc->global_irq,
300 plintsrc->io_sapic_vector,
301 plintsrc->eid,
302 plintsrc->id,
303 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
304 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
305 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
306 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
307 ACPI_MADT_TRIGGER_EDGE) ?
308 IOSAPIC_EDGE : IOSAPIC_LEVEL);
310 platform_intr_list[plintsrc->type] = vector;
311 if (acpi_madt_rev > 1) {
312 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
316 * Save the physical id, so we can check when its being removed
318 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
320 return 0;
323 #ifdef CONFIG_HOTPLUG_CPU
324 unsigned int can_cpei_retarget(void)
326 extern int cpe_vector;
327 extern unsigned int force_cpei_retarget;
330 * Only if CPEI is supported and the override flag
331 * is present, otherwise return that its re-targettable
332 * if we are in polling mode.
334 if (cpe_vector > 0) {
335 if (acpi_cpei_override || force_cpei_retarget)
336 return 1;
337 else
338 return 0;
340 return 1;
343 unsigned int is_cpu_cpei_target(unsigned int cpu)
345 unsigned int logical_id;
347 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
349 if (logical_id == cpu)
350 return 1;
351 else
352 return 0;
355 void set_cpei_target_cpu(unsigned int cpu)
357 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
359 #endif
361 unsigned int get_cpei_target_cpu(void)
363 return acpi_cpei_phys_cpuid;
366 static int __init
367 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
368 const unsigned long end)
370 struct acpi_madt_interrupt_override *p;
372 p = (struct acpi_madt_interrupt_override *)header;
374 if (BAD_MADT_ENTRY(p, end))
375 return -EINVAL;
377 iosapic_override_isa_irq(p->source_irq, p->global_irq,
378 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
379 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
380 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
381 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
382 ACPI_MADT_TRIGGER_EDGE) ?
383 IOSAPIC_EDGE : IOSAPIC_LEVEL);
384 return 0;
387 static int __init
388 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
390 struct acpi_madt_nmi_source *nmi_src;
392 nmi_src = (struct acpi_madt_nmi_source *)header;
394 if (BAD_MADT_ENTRY(nmi_src, end))
395 return -EINVAL;
397 /* TBD: Support nimsrc entries */
398 return 0;
401 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
403 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
406 * Unfortunately ITC_DRIFT is not yet part of the
407 * official SAL spec, so the ITC_DRIFT bit is not
408 * set by the BIOS on this hardware.
410 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
412 cyclone_setup();
416 static int __init acpi_parse_madt(struct acpi_table_header *table)
418 if (!table)
419 return -EINVAL;
421 acpi_madt = (struct acpi_table_madt *)table;
423 acpi_madt_rev = acpi_madt->header.revision;
425 /* remember the value for reference after free_initmem() */
426 #ifdef CONFIG_ITANIUM
427 has_8259 = 1; /* Firmware on old Itanium systems is broken */
428 #else
429 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
430 #endif
431 iosapic_system_init(has_8259);
433 /* Get base address of IPI Message Block */
435 if (acpi_madt->address)
436 ipi_base_addr = ioremap(acpi_madt->address, 0);
438 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
440 acpi_madt_oem_check(acpi_madt->header.oem_id,
441 acpi_madt->header.oem_table_id);
443 return 0;
446 #ifdef CONFIG_ACPI_NUMA
448 #undef SLIT_DEBUG
450 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
452 static int __initdata srat_num_cpus; /* number of cpus */
453 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
454 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
455 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
456 static struct acpi_table_slit __initdata *slit_table;
457 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
459 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
461 int pxm;
463 pxm = pa->proximity_domain_lo;
464 if (ia64_platform_is("sn2"))
465 pxm += pa->proximity_domain_hi[0] << 8;
466 return pxm;
469 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
471 int pxm;
473 pxm = ma->proximity_domain;
474 if (!ia64_platform_is("sn2"))
475 pxm &= 0xff;
477 return pxm;
481 * ACPI 2.0 SLIT (System Locality Information Table)
482 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
484 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
486 u32 len;
488 len = sizeof(struct acpi_table_header) + 8
489 + slit->locality_count * slit->locality_count;
490 if (slit->header.length != len) {
491 printk(KERN_ERR
492 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
493 len, slit->header.length);
494 return;
496 slit_table = slit;
499 void __init
500 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
502 int pxm;
504 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
505 return;
507 pxm = get_processor_proximity_domain(pa);
509 /* record this node in proximity bitmap */
510 pxm_bit_set(pxm);
512 node_cpuid[srat_num_cpus].phys_id =
513 (pa->apic_id << 8) | (pa->local_sapic_eid);
514 /* nid should be overridden as logical node id later */
515 node_cpuid[srat_num_cpus].nid = pxm;
516 cpu_set(srat_num_cpus, early_cpu_possible_map);
517 srat_num_cpus++;
520 void __init
521 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
523 unsigned long paddr, size;
524 int pxm;
525 struct node_memblk_s *p, *q, *pend;
527 pxm = get_memory_proximity_domain(ma);
529 /* fill node memory chunk structure */
530 paddr = ma->base_address;
531 size = ma->length;
533 /* Ignore disabled entries */
534 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
535 return;
537 /* record this node in proximity bitmap */
538 pxm_bit_set(pxm);
540 /* Insertion sort based on base address */
541 pend = &node_memblk[num_node_memblks];
542 for (p = &node_memblk[0]; p < pend; p++) {
543 if (paddr < p->start_paddr)
544 break;
546 if (p < pend) {
547 for (q = pend - 1; q >= p; q--)
548 *(q + 1) = *q;
550 p->start_paddr = paddr;
551 p->size = size;
552 p->nid = pxm;
553 num_node_memblks++;
556 void __init acpi_numa_arch_fixup(void)
558 int i, j, node_from, node_to;
560 /* If there's no SRAT, fix the phys_id and mark node 0 online */
561 if (srat_num_cpus == 0) {
562 node_set_online(0);
563 node_cpuid[0].phys_id = hard_smp_processor_id();
564 return;
568 * MCD - This can probably be dropped now. No need for pxm ID to node ID
569 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
571 nodes_clear(node_online_map);
572 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
573 if (pxm_bit_test(i)) {
574 int nid = acpi_map_pxm_to_node(i);
575 node_set_online(nid);
579 /* set logical node id in memory chunk structure */
580 for (i = 0; i < num_node_memblks; i++)
581 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
583 /* assign memory bank numbers for each chunk on each node */
584 for_each_online_node(i) {
585 int bank;
587 bank = 0;
588 for (j = 0; j < num_node_memblks; j++)
589 if (node_memblk[j].nid == i)
590 node_memblk[j].bank = bank++;
593 /* set logical node id in cpu structure */
594 for_each_possible_early_cpu(i)
595 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
597 printk(KERN_INFO "Number of logical nodes in system = %d\n",
598 num_online_nodes());
599 printk(KERN_INFO "Number of memory chunks in system = %d\n",
600 num_node_memblks);
602 if (!slit_table) {
603 for (i = 0; i < MAX_NUMNODES; i++)
604 for (j = 0; j < MAX_NUMNODES; j++)
605 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
606 REMOTE_DISTANCE;
607 return;
610 memset(numa_slit, -1, sizeof(numa_slit));
611 for (i = 0; i < slit_table->locality_count; i++) {
612 if (!pxm_bit_test(i))
613 continue;
614 node_from = pxm_to_node(i);
615 for (j = 0; j < slit_table->locality_count; j++) {
616 if (!pxm_bit_test(j))
617 continue;
618 node_to = pxm_to_node(j);
619 node_distance(node_from, node_to) =
620 slit_table->entry[i * slit_table->locality_count + j];
624 #ifdef SLIT_DEBUG
625 printk("ACPI 2.0 SLIT locality table:\n");
626 for_each_online_node(i) {
627 for_each_online_node(j)
628 printk("%03d ", node_distance(i, j));
629 printk("\n");
631 #endif
633 #endif /* CONFIG_ACPI_NUMA */
636 * success: return IRQ number (>=0)
637 * failure: return < 0
639 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
641 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
642 return gsi;
644 if (has_8259 && gsi < 16)
645 return isa_irq_to_vector(gsi);
647 return iosapic_register_intr(gsi,
648 (polarity ==
649 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
650 IOSAPIC_POL_LOW,
651 (triggering ==
652 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
653 IOSAPIC_LEVEL);
656 void acpi_unregister_gsi(u32 gsi)
658 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
659 return;
661 if (has_8259 && gsi < 16)
662 return;
664 iosapic_unregister_intr(gsi);
667 static int __init acpi_parse_fadt(struct acpi_table_header *table)
669 struct acpi_table_header *fadt_header;
670 struct acpi_table_fadt *fadt;
672 if (!table)
673 return -EINVAL;
675 fadt_header = (struct acpi_table_header *)table;
676 if (fadt_header->revision != 3)
677 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
679 fadt = (struct acpi_table_fadt *)fadt_header;
681 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
682 ACPI_ACTIVE_LOW);
683 return 0;
686 int __init early_acpi_boot_init(void)
688 int ret;
691 * do a partial walk of MADT to determine how many CPUs
692 * we have including offline CPUs
694 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
695 printk(KERN_ERR PREFIX "Can't find MADT\n");
696 return 0;
699 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
700 acpi_parse_lsapic, NR_CPUS);
701 if (ret < 1)
702 printk(KERN_ERR PREFIX
703 "Error parsing MADT - no LAPIC entries\n");
705 return 0;
710 int __init acpi_boot_init(void)
714 * MADT
715 * ----
716 * Parse the Multiple APIC Description Table (MADT), if exists.
717 * Note that this table provides platform SMP configuration
718 * information -- the successor to MPS tables.
721 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
722 printk(KERN_ERR PREFIX "Can't find MADT\n");
723 goto skip_madt;
726 /* Local APIC */
728 if (acpi_table_parse_madt
729 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
730 printk(KERN_ERR PREFIX
731 "Error parsing LAPIC address override entry\n");
733 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
734 < 0)
735 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
737 /* I/O APIC */
739 if (acpi_table_parse_madt
740 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
741 if (!ia64_platform_is("sn2"))
742 printk(KERN_ERR PREFIX
743 "Error parsing MADT - no IOSAPIC entries\n");
746 /* System-Level Interrupt Routing */
748 if (acpi_table_parse_madt
749 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
750 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
751 printk(KERN_ERR PREFIX
752 "Error parsing platform interrupt source entry\n");
754 if (acpi_table_parse_madt
755 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
756 printk(KERN_ERR PREFIX
757 "Error parsing interrupt source overrides entry\n");
759 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
760 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
761 skip_madt:
764 * FADT says whether a legacy keyboard controller is present.
765 * The FADT also contains an SCI_INT line, by which the system
766 * gets interrupts such as power and sleep buttons. If it's not
767 * on a Legacy interrupt, it needs to be setup.
769 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
770 printk(KERN_ERR PREFIX "Can't find FADT\n");
772 #ifdef CONFIG_SMP
773 if (available_cpus == 0) {
774 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
775 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
776 smp_boot_data.cpu_phys_id[available_cpus] =
777 hard_smp_processor_id();
778 available_cpus = 1; /* We've got at least one of these, no? */
780 smp_boot_data.cpu_count = available_cpus;
782 smp_build_cpu_map();
783 # ifdef CONFIG_ACPI_NUMA
784 if (srat_num_cpus == 0) {
785 int cpu, i = 1;
786 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
787 if (smp_boot_data.cpu_phys_id[cpu] !=
788 hard_smp_processor_id())
789 node_cpuid[i++].phys_id =
790 smp_boot_data.cpu_phys_id[cpu];
792 # endif
793 #endif
794 #ifdef CONFIG_ACPI_NUMA
795 build_cpu_to_node_map();
796 #endif
797 /* Make boot-up look pretty */
798 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
799 total_cpus);
800 return 0;
803 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
805 int tmp;
807 if (has_8259 && gsi < 16)
808 *irq = isa_irq_to_vector(gsi);
809 else {
810 tmp = gsi_to_irq(gsi);
811 if (tmp == -1)
812 return -1;
813 *irq = tmp;
815 return 0;
819 * ACPI based hotplug CPU support
821 #ifdef CONFIG_ACPI_HOTPLUG_CPU
822 static
823 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
825 #ifdef CONFIG_ACPI_NUMA
826 int pxm_id;
827 int nid;
829 pxm_id = acpi_get_pxm(handle);
831 * We don't have cpu-only-node hotadd. But if the system equips
832 * SRAT table, pxm is already found and node is ready.
833 * So, just pxm_to_nid(pxm) is OK.
834 * This code here is for the system which doesn't have full SRAT
835 * table for possible cpus.
837 nid = acpi_map_pxm_to_node(pxm_id);
838 node_cpuid[cpu].phys_id = physid;
839 node_cpuid[cpu].nid = nid;
840 #endif
841 return (0);
844 int additional_cpus __initdata = -1;
846 static __init int setup_additional_cpus(char *s)
848 if (s)
849 additional_cpus = simple_strtol(s, NULL, 0);
851 return 0;
854 early_param("additional_cpus", setup_additional_cpus);
857 * cpu_possible_map should be static, it cannot change as CPUs
858 * are onlined, or offlined. The reason is per-cpu data-structures
859 * are allocated by some modules at init time, and dont expect to
860 * do this dynamically on cpu arrival/departure.
861 * cpu_present_map on the other hand can change dynamically.
862 * In case when cpu_hotplug is not compiled, then we resort to current
863 * behaviour, which is cpu_possible == cpu_present.
864 * - Ashok Raj
866 * Three ways to find out the number of additional hotplug CPUs:
867 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
868 * - The user can overwrite it with additional_cpus=NUM
869 * - Otherwise don't reserve additional CPUs.
871 __init void prefill_possible_map(void)
873 int i;
874 int possible, disabled_cpus;
876 disabled_cpus = total_cpus - available_cpus;
878 if (additional_cpus == -1) {
879 if (disabled_cpus > 0)
880 additional_cpus = disabled_cpus;
881 else
882 additional_cpus = 0;
885 possible = available_cpus + additional_cpus;
887 if (possible > NR_CPUS)
888 possible = NR_CPUS;
890 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
891 possible, max((possible - available_cpus), 0));
893 for (i = 0; i < possible; i++)
894 set_cpu_possible(i, true);
897 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
899 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
900 union acpi_object *obj;
901 struct acpi_madt_local_sapic *lsapic;
902 cpumask_t tmp_map;
903 int cpu, physid;
905 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
906 return -EINVAL;
908 if (!buffer.length || !buffer.pointer)
909 return -EINVAL;
911 obj = buffer.pointer;
912 if (obj->type != ACPI_TYPE_BUFFER)
914 kfree(buffer.pointer);
915 return -EINVAL;
918 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
920 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
921 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
922 kfree(buffer.pointer);
923 return -EINVAL;
926 physid = ((lsapic->id << 8) | (lsapic->eid));
928 kfree(buffer.pointer);
929 buffer.length = ACPI_ALLOCATE_BUFFER;
930 buffer.pointer = NULL;
932 cpumask_complement(&tmp_map, cpu_present_mask);
933 cpu = cpumask_first(&tmp_map);
934 if (cpu >= nr_cpu_ids)
935 return -EINVAL;
937 acpi_map_cpu2node(handle, cpu, physid);
939 cpu_set(cpu, cpu_present_map);
940 ia64_cpu_to_sapicid[cpu] = physid;
942 *pcpu = cpu;
943 return (0);
946 EXPORT_SYMBOL(acpi_map_lsapic);
948 int acpi_unmap_lsapic(int cpu)
950 ia64_cpu_to_sapicid[cpu] = -1;
951 cpu_clear(cpu, cpu_present_map);
953 #ifdef CONFIG_ACPI_NUMA
954 /* NUMA specific cleanup's */
955 #endif
957 return (0);
960 EXPORT_SYMBOL(acpi_unmap_lsapic);
961 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
963 #ifdef CONFIG_ACPI_NUMA
964 static acpi_status __devinit
965 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
967 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
968 union acpi_object *obj;
969 struct acpi_madt_io_sapic *iosapic;
970 unsigned int gsi_base;
971 int pxm, node;
973 /* Only care about objects w/ a method that returns the MADT */
974 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
975 return AE_OK;
977 if (!buffer.length || !buffer.pointer)
978 return AE_OK;
980 obj = buffer.pointer;
981 if (obj->type != ACPI_TYPE_BUFFER ||
982 obj->buffer.length < sizeof(*iosapic)) {
983 kfree(buffer.pointer);
984 return AE_OK;
987 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
989 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
990 kfree(buffer.pointer);
991 return AE_OK;
994 gsi_base = iosapic->global_irq_base;
996 kfree(buffer.pointer);
999 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
1000 * us which node to associate this with.
1002 pxm = acpi_get_pxm(handle);
1003 if (pxm < 0)
1004 return AE_OK;
1006 node = pxm_to_node(pxm);
1008 if (node >= MAX_NUMNODES || !node_online(node) ||
1009 cpumask_empty(cpumask_of_node(node)))
1010 return AE_OK;
1012 /* We know a gsi to node mapping! */
1013 map_iosapic_to_node(gsi_base, node);
1014 return AE_OK;
1017 static int __init
1018 acpi_map_iosapics (void)
1020 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1021 return 0;
1024 fs_initcall(acpi_map_iosapics);
1025 #endif /* CONFIG_ACPI_NUMA */
1027 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1029 int err;
1031 if ((err = iosapic_init(phys_addr, gsi_base)))
1032 return err;
1034 #ifdef CONFIG_ACPI_NUMA
1035 acpi_map_iosapic(handle, 0, NULL, NULL);
1036 #endif /* CONFIG_ACPI_NUMA */
1038 return 0;
1041 EXPORT_SYMBOL(acpi_register_ioapic);
1043 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1045 return iosapic_remove(gsi_base);
1048 EXPORT_SYMBOL(acpi_unregister_ioapic);
1051 * acpi_save_state_mem() - save kernel state
1053 * TBD when when IA64 starts to support suspend...
1055 int acpi_save_state_mem(void) { return 0; }
1058 * acpi_restore_state()
1060 void acpi_restore_state_mem(void) {}
1063 * do_suspend_lowlevel()
1065 void do_suspend_lowlevel(void) {}
1067 #endif /* CONFIG_ACPI */