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Merge tag 'trace-ipi-tracepoints' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / arch / ia64 / kernel / acpi.c
1 /*
2 * acpi.c - Architecture-Specific Low-Level ACPI Support
3 *
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>
15 *
16 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17 *
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.
22 *
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.
27 *
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
31 *
32 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
33 */
34
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 <linux/slab.h>
48 #include <acpi/processor.h>
49 #include <asm/io.h>
50 #include <asm/iosapic.h>
51 #include <asm/machvec.h>
52 #include <asm/page.h>
53 #include <asm/numa.h>
54 #include <asm/sal.h>
55 #include <asm/cyclone.h>
56
57 #define PREFIX "ACPI: "
58
59 int acpi_lapic;
60 unsigned int acpi_cpei_override;
61 unsigned int acpi_cpei_phys_cpuid;
62
63 unsigned long acpi_wakeup_address = 0;
64
65 #ifdef CONFIG_IA64_GENERIC
66 static unsigned long __init acpi_find_rsdp(void)
67 {
68 unsigned long rsdp_phys = 0;
69
70 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
71 rsdp_phys = efi.acpi20;
72 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
73 printk(KERN_WARNING PREFIX
74 "v1.0/r0.71 tables no longer supported\n");
75 return rsdp_phys;
76 }
77
78 const char __init *
79 acpi_get_sysname(void)
80 {
81 unsigned long rsdp_phys;
82 struct acpi_table_rsdp *rsdp;
83 struct acpi_table_xsdt *xsdt;
84 struct acpi_table_header *hdr;
85 #ifdef CONFIG_INTEL_IOMMU
86 u64 i, nentries;
87 #endif
88
89 rsdp_phys = acpi_find_rsdp();
90 if (!rsdp_phys) {
91 printk(KERN_ERR
92 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
93 return "dig";
94 }
95
96 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
97 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
98 printk(KERN_ERR
99 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
100 return "dig";
101 }
102
103 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
104 hdr = &xsdt->header;
105 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
106 printk(KERN_ERR
107 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
108 return "dig";
109 }
110
111 if (!strcmp(hdr->oem_id, "HP")) {
112 return "hpzx1";
113 } else if (!strcmp(hdr->oem_id, "SGI")) {
114 if (!strcmp(hdr->oem_table_id + 4, "UV"))
115 return "uv";
116 else
117 return "sn2";
118 }
119
120 #ifdef CONFIG_INTEL_IOMMU
121 /* Look for Intel IOMMU */
122 nentries = (hdr->length - sizeof(*hdr)) /
123 sizeof(xsdt->table_offset_entry[0]);
124 for (i = 0; i < nentries; i++) {
125 hdr = __va(xsdt->table_offset_entry[i]);
126 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
127 sizeof(ACPI_SIG_DMAR) - 1) == 0)
128 return "dig_vtd";
129 }
130 #endif
131
132 return "dig";
133 }
134 #endif /* CONFIG_IA64_GENERIC */
135
136 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
137
138 /* Array to record platform interrupt vectors for generic interrupt routing. */
139 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
140 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
141 };
142
143 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
144
145 /*
146 * Interrupt routing API for device drivers. Provides interrupt vector for
147 * a generic platform event. Currently only CPEI is implemented.
148 */
149 int acpi_request_vector(u32 int_type)
150 {
151 int vector = -1;
152
153 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
154 /* corrected platform error interrupt */
155 vector = platform_intr_list[int_type];
156 } else
157 printk(KERN_ERR
158 "acpi_request_vector(): invalid interrupt type\n");
159 return vector;
160 }
161
162 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
163 {
164 return __va(phys_addr);
165 }
166
167 void __init __acpi_unmap_table(char *map, unsigned long size)
168 {
169 }
170
171 /* --------------------------------------------------------------------------
172 Boot-time Table Parsing
173 -------------------------------------------------------------------------- */
174
175 static int available_cpus __initdata;
176 struct acpi_table_madt *acpi_madt __initdata;
177 static u8 has_8259;
178
179 static int __init
180 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
181 const unsigned long end)
182 {
183 struct acpi_madt_local_apic_override *lapic;
184
185 lapic = (struct acpi_madt_local_apic_override *)header;
186
187 if (BAD_MADT_ENTRY(lapic, end))
188 return -EINVAL;
189
190 if (lapic->address) {
191 iounmap(ipi_base_addr);
192 ipi_base_addr = ioremap(lapic->address, 0);
193 }
194 return 0;
195 }
196
197 static int __init
198 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
199 {
200 struct acpi_madt_local_sapic *lsapic;
201
202 lsapic = (struct acpi_madt_local_sapic *)header;
203
204 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
205
206 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
207 #ifdef CONFIG_SMP
208 smp_boot_data.cpu_phys_id[available_cpus] =
209 (lsapic->id << 8) | lsapic->eid;
210 #endif
211 ++available_cpus;
212 }
213
214 total_cpus++;
215 return 0;
216 }
217
218 static int __init
219 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
220 {
221 struct acpi_madt_local_apic_nmi *lacpi_nmi;
222
223 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
224
225 if (BAD_MADT_ENTRY(lacpi_nmi, end))
226 return -EINVAL;
227
228 /* TBD: Support lapic_nmi entries */
229 return 0;
230 }
231
232 static int __init
233 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
234 {
235 struct acpi_madt_io_sapic *iosapic;
236
237 iosapic = (struct acpi_madt_io_sapic *)header;
238
239 if (BAD_MADT_ENTRY(iosapic, end))
240 return -EINVAL;
241
242 return iosapic_init(iosapic->address, iosapic->global_irq_base);
243 }
244
245 static unsigned int __initdata acpi_madt_rev;
246
247 static int __init
248 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
249 const unsigned long end)
250 {
251 struct acpi_madt_interrupt_source *plintsrc;
252 int vector;
253
254 plintsrc = (struct acpi_madt_interrupt_source *)header;
255
256 if (BAD_MADT_ENTRY(plintsrc, end))
257 return -EINVAL;
258
259 /*
260 * Get vector assignment for this interrupt, set attributes,
261 * and program the IOSAPIC routing table.
262 */
263 vector = iosapic_register_platform_intr(plintsrc->type,
264 plintsrc->global_irq,
265 plintsrc->io_sapic_vector,
266 plintsrc->eid,
267 plintsrc->id,
268 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
269 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
270 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
271 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
272 ACPI_MADT_TRIGGER_EDGE) ?
273 IOSAPIC_EDGE : IOSAPIC_LEVEL);
274
275 platform_intr_list[plintsrc->type] = vector;
276 if (acpi_madt_rev > 1) {
277 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
278 }
279
280 /*
281 * Save the physical id, so we can check when its being removed
282 */
283 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
284
285 return 0;
286 }
287
288 #ifdef CONFIG_HOTPLUG_CPU
289 unsigned int can_cpei_retarget(void)
290 {
291 extern int cpe_vector;
292 extern unsigned int force_cpei_retarget;
293
294 /*
295 * Only if CPEI is supported and the override flag
296 * is present, otherwise return that its re-targettable
297 * if we are in polling mode.
298 */
299 if (cpe_vector > 0) {
300 if (acpi_cpei_override || force_cpei_retarget)
301 return 1;
302 else
303 return 0;
304 }
305 return 1;
306 }
307
308 unsigned int is_cpu_cpei_target(unsigned int cpu)
309 {
310 unsigned int logical_id;
311
312 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
313
314 if (logical_id == cpu)
315 return 1;
316 else
317 return 0;
318 }
319
320 void set_cpei_target_cpu(unsigned int cpu)
321 {
322 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
323 }
324 #endif
325
326 unsigned int get_cpei_target_cpu(void)
327 {
328 return acpi_cpei_phys_cpuid;
329 }
330
331 static int __init
332 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
333 const unsigned long end)
334 {
335 struct acpi_madt_interrupt_override *p;
336
337 p = (struct acpi_madt_interrupt_override *)header;
338
339 if (BAD_MADT_ENTRY(p, end))
340 return -EINVAL;
341
342 iosapic_override_isa_irq(p->source_irq, p->global_irq,
343 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
344 ACPI_MADT_POLARITY_ACTIVE_LOW) ?
345 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
346 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
347 ACPI_MADT_TRIGGER_LEVEL) ?
348 IOSAPIC_LEVEL : IOSAPIC_EDGE);
349 return 0;
350 }
351
352 static int __init
353 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
354 {
355 struct acpi_madt_nmi_source *nmi_src;
356
357 nmi_src = (struct acpi_madt_nmi_source *)header;
358
359 if (BAD_MADT_ENTRY(nmi_src, end))
360 return -EINVAL;
361
362 /* TBD: Support nimsrc entries */
363 return 0;
364 }
365
366 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
367 {
368 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
369
370 /*
371 * Unfortunately ITC_DRIFT is not yet part of the
372 * official SAL spec, so the ITC_DRIFT bit is not
373 * set by the BIOS on this hardware.
374 */
375 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
376
377 cyclone_setup();
378 }
379 }
380
381 static int __init acpi_parse_madt(struct acpi_table_header *table)
382 {
383 if (!table)
384 return -EINVAL;
385
386 acpi_madt = (struct acpi_table_madt *)table;
387
388 acpi_madt_rev = acpi_madt->header.revision;
389
390 /* remember the value for reference after free_initmem() */
391 #ifdef CONFIG_ITANIUM
392 has_8259 = 1; /* Firmware on old Itanium systems is broken */
393 #else
394 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
395 #endif
396 iosapic_system_init(has_8259);
397
398 /* Get base address of IPI Message Block */
399
400 if (acpi_madt->address)
401 ipi_base_addr = ioremap(acpi_madt->address, 0);
402
403 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
404
405 acpi_madt_oem_check(acpi_madt->header.oem_id,
406 acpi_madt->header.oem_table_id);
407
408 return 0;
409 }
410
411 #ifdef CONFIG_ACPI_NUMA
412
413 #undef SLIT_DEBUG
414
415 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
416
417 static int __initdata srat_num_cpus; /* number of cpus */
418 static u32 pxm_flag[PXM_FLAG_LEN];
419 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
420 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
421 static struct acpi_table_slit __initdata *slit_table;
422 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
423
424 static int __init
425 get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
426 {
427 int pxm;
428
429 pxm = pa->proximity_domain_lo;
430 if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
431 pxm += pa->proximity_domain_hi[0] << 8;
432 return pxm;
433 }
434
435 static int __init
436 get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
437 {
438 int pxm;
439
440 pxm = ma->proximity_domain;
441 if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
442 pxm &= 0xff;
443
444 return pxm;
445 }
446
447 /*
448 * ACPI 2.0 SLIT (System Locality Information Table)
449 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
450 */
451 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
452 {
453 u32 len;
454
455 len = sizeof(struct acpi_table_header) + 8
456 + slit->locality_count * slit->locality_count;
457 if (slit->header.length != len) {
458 printk(KERN_ERR
459 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
460 len, slit->header.length);
461 return;
462 }
463 slit_table = slit;
464 }
465
466 void __init
467 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
468 {
469 int pxm;
470
471 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
472 return;
473
474 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
475 printk_once(KERN_WARNING
476 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
477 ARRAY_SIZE(node_cpuid));
478 return;
479 }
480 pxm = get_processor_proximity_domain(pa);
481
482 /* record this node in proximity bitmap */
483 pxm_bit_set(pxm);
484
485 node_cpuid[srat_num_cpus].phys_id =
486 (pa->apic_id << 8) | (pa->local_sapic_eid);
487 /* nid should be overridden as logical node id later */
488 node_cpuid[srat_num_cpus].nid = pxm;
489 cpu_set(srat_num_cpus, early_cpu_possible_map);
490 srat_num_cpus++;
491 }
492
493 int __init
494 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
495 {
496 unsigned long paddr, size;
497 int pxm;
498 struct node_memblk_s *p, *q, *pend;
499
500 pxm = get_memory_proximity_domain(ma);
501
502 /* fill node memory chunk structure */
503 paddr = ma->base_address;
504 size = ma->length;
505
506 /* Ignore disabled entries */
507 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
508 return -1;
509
510 /* record this node in proximity bitmap */
511 pxm_bit_set(pxm);
512
513 /* Insertion sort based on base address */
514 pend = &node_memblk[num_node_memblks];
515 for (p = &node_memblk[0]; p < pend; p++) {
516 if (paddr < p->start_paddr)
517 break;
518 }
519 if (p < pend) {
520 for (q = pend - 1; q >= p; q--)
521 *(q + 1) = *q;
522 }
523 p->start_paddr = paddr;
524 p->size = size;
525 p->nid = pxm;
526 num_node_memblks++;
527 return 0;
528 }
529
530 void __init acpi_numa_arch_fixup(void)
531 {
532 int i, j, node_from, node_to;
533
534 /* If there's no SRAT, fix the phys_id and mark node 0 online */
535 if (srat_num_cpus == 0) {
536 node_set_online(0);
537 node_cpuid[0].phys_id = hard_smp_processor_id();
538 return;
539 }
540
541 /*
542 * MCD - This can probably be dropped now. No need for pxm ID to node ID
543 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
544 */
545 nodes_clear(node_online_map);
546 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
547 if (pxm_bit_test(i)) {
548 int nid = acpi_map_pxm_to_node(i);
549 node_set_online(nid);
550 }
551 }
552
553 /* set logical node id in memory chunk structure */
554 for (i = 0; i < num_node_memblks; i++)
555 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
556
557 /* assign memory bank numbers for each chunk on each node */
558 for_each_online_node(i) {
559 int bank;
560
561 bank = 0;
562 for (j = 0; j < num_node_memblks; j++)
563 if (node_memblk[j].nid == i)
564 node_memblk[j].bank = bank++;
565 }
566
567 /* set logical node id in cpu structure */
568 for_each_possible_early_cpu(i)
569 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
570
571 printk(KERN_INFO "Number of logical nodes in system = %d\n",
572 num_online_nodes());
573 printk(KERN_INFO "Number of memory chunks in system = %d\n",
574 num_node_memblks);
575
576 if (!slit_table) {
577 for (i = 0; i < MAX_NUMNODES; i++)
578 for (j = 0; j < MAX_NUMNODES; j++)
579 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
580 REMOTE_DISTANCE;
581 return;
582 }
583
584 memset(numa_slit, -1, sizeof(numa_slit));
585 for (i = 0; i < slit_table->locality_count; i++) {
586 if (!pxm_bit_test(i))
587 continue;
588 node_from = pxm_to_node(i);
589 for (j = 0; j < slit_table->locality_count; j++) {
590 if (!pxm_bit_test(j))
591 continue;
592 node_to = pxm_to_node(j);
593 node_distance(node_from, node_to) =
594 slit_table->entry[i * slit_table->locality_count + j];
595 }
596 }
597
598 #ifdef SLIT_DEBUG
599 printk("ACPI 2.0 SLIT locality table:\n");
600 for_each_online_node(i) {
601 for_each_online_node(j)
602 printk("%03d ", node_distance(i, j));
603 printk("\n");
604 }
605 #endif
606 }
607 #endif /* CONFIG_ACPI_NUMA */
608
609 /*
610 * success: return IRQ number (>=0)
611 * failure: return < 0
612 */
613 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
614 {
615 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
616 return gsi;
617
618 if (has_8259 && gsi < 16)
619 return isa_irq_to_vector(gsi);
620
621 return iosapic_register_intr(gsi,
622 (polarity ==
623 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
624 IOSAPIC_POL_LOW,
625 (triggering ==
626 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
627 IOSAPIC_LEVEL);
628 }
629 EXPORT_SYMBOL_GPL(acpi_register_gsi);
630
631 void acpi_unregister_gsi(u32 gsi)
632 {
633 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
634 return;
635
636 if (has_8259 && gsi < 16)
637 return;
638
639 iosapic_unregister_intr(gsi);
640 }
641 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
642
643 static int __init acpi_parse_fadt(struct acpi_table_header *table)
644 {
645 struct acpi_table_header *fadt_header;
646 struct acpi_table_fadt *fadt;
647
648 if (!table)
649 return -EINVAL;
650
651 fadt_header = (struct acpi_table_header *)table;
652 if (fadt_header->revision != 3)
653 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
654
655 fadt = (struct acpi_table_fadt *)fadt_header;
656
657 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
658 ACPI_ACTIVE_LOW);
659 return 0;
660 }
661
662 int __init early_acpi_boot_init(void)
663 {
664 int ret;
665
666 /*
667 * do a partial walk of MADT to determine how many CPUs
668 * we have including offline CPUs
669 */
670 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
671 printk(KERN_ERR PREFIX "Can't find MADT\n");
672 return 0;
673 }
674
675 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
676 acpi_parse_lsapic, NR_CPUS);
677 if (ret < 1)
678 printk(KERN_ERR PREFIX
679 "Error parsing MADT - no LAPIC entries\n");
680 else
681 acpi_lapic = 1;
682
683 #ifdef CONFIG_SMP
684 if (available_cpus == 0) {
685 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
686 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
687 smp_boot_data.cpu_phys_id[available_cpus] =
688 hard_smp_processor_id();
689 available_cpus = 1; /* We've got at least one of these, no? */
690 }
691 smp_boot_data.cpu_count = available_cpus;
692 #endif
693 /* Make boot-up look pretty */
694 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
695 total_cpus);
696
697 return 0;
698 }
699
700 int __init acpi_boot_init(void)
701 {
702
703 /*
704 * MADT
705 * ----
706 * Parse the Multiple APIC Description Table (MADT), if exists.
707 * Note that this table provides platform SMP configuration
708 * information -- the successor to MPS tables.
709 */
710
711 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
712 printk(KERN_ERR PREFIX "Can't find MADT\n");
713 goto skip_madt;
714 }
715
716 /* Local APIC */
717
718 if (acpi_table_parse_madt
719 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
720 printk(KERN_ERR PREFIX
721 "Error parsing LAPIC address override entry\n");
722
723 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
724 < 0)
725 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
726
727 /* I/O APIC */
728
729 if (acpi_table_parse_madt
730 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
731 if (!ia64_platform_is("sn2"))
732 printk(KERN_ERR PREFIX
733 "Error parsing MADT - no IOSAPIC entries\n");
734 }
735
736 /* System-Level Interrupt Routing */
737
738 if (acpi_table_parse_madt
739 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
740 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
741 printk(KERN_ERR PREFIX
742 "Error parsing platform interrupt source entry\n");
743
744 if (acpi_table_parse_madt
745 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
746 printk(KERN_ERR PREFIX
747 "Error parsing interrupt source overrides entry\n");
748
749 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
750 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
751 skip_madt:
752
753 /*
754 * FADT says whether a legacy keyboard controller is present.
755 * The FADT also contains an SCI_INT line, by which the system
756 * gets interrupts such as power and sleep buttons. If it's not
757 * on a Legacy interrupt, it needs to be setup.
758 */
759 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
760 printk(KERN_ERR PREFIX "Can't find FADT\n");
761
762 #ifdef CONFIG_ACPI_NUMA
763 #ifdef CONFIG_SMP
764 if (srat_num_cpus == 0) {
765 int cpu, i = 1;
766 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
767 if (smp_boot_data.cpu_phys_id[cpu] !=
768 hard_smp_processor_id())
769 node_cpuid[i++].phys_id =
770 smp_boot_data.cpu_phys_id[cpu];
771 }
772 #endif
773 build_cpu_to_node_map();
774 #endif
775 return 0;
776 }
777
778 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
779 {
780 int tmp;
781
782 if (has_8259 && gsi < 16)
783 *irq = isa_irq_to_vector(gsi);
784 else {
785 tmp = gsi_to_irq(gsi);
786 if (tmp == -1)
787 return -1;
788 *irq = tmp;
789 }
790 return 0;
791 }
792
793 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
794 {
795 if (isa_irq >= 16)
796 return -1;
797 *gsi = isa_irq;
798 return 0;
799 }
800
801 /*
802 * ACPI based hotplug CPU support
803 */
804 #ifdef CONFIG_ACPI_HOTPLUG_CPU
805 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
806 {
807 #ifdef CONFIG_ACPI_NUMA
808 /*
809 * We don't have cpu-only-node hotadd. But if the system equips
810 * SRAT table, pxm is already found and node is ready.
811 * So, just pxm_to_nid(pxm) is OK.
812 * This code here is for the system which doesn't have full SRAT
813 * table for possible cpus.
814 */
815 node_cpuid[cpu].phys_id = physid;
816 node_cpuid[cpu].nid = acpi_get_node(handle);
817 #endif
818 return 0;
819 }
820
821 int additional_cpus __initdata = -1;
822
823 static __init int setup_additional_cpus(char *s)
824 {
825 if (s)
826 additional_cpus = simple_strtol(s, NULL, 0);
827
828 return 0;
829 }
830
831 early_param("additional_cpus", setup_additional_cpus);
832
833 /*
834 * cpu_possible_mask should be static, it cannot change as CPUs
835 * are onlined, or offlined. The reason is per-cpu data-structures
836 * are allocated by some modules at init time, and dont expect to
837 * do this dynamically on cpu arrival/departure.
838 * cpu_present_mask on the other hand can change dynamically.
839 * In case when cpu_hotplug is not compiled, then we resort to current
840 * behaviour, which is cpu_possible == cpu_present.
841 * - Ashok Raj
842 *
843 * Three ways to find out the number of additional hotplug CPUs:
844 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
845 * - The user can overwrite it with additional_cpus=NUM
846 * - Otherwise don't reserve additional CPUs.
847 */
848 __init void prefill_possible_map(void)
849 {
850 int i;
851 int possible, disabled_cpus;
852
853 disabled_cpus = total_cpus - available_cpus;
854
855 if (additional_cpus == -1) {
856 if (disabled_cpus > 0)
857 additional_cpus = disabled_cpus;
858 else
859 additional_cpus = 0;
860 }
861
862 possible = available_cpus + additional_cpus;
863
864 if (possible > nr_cpu_ids)
865 possible = nr_cpu_ids;
866
867 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
868 possible, max((possible - available_cpus), 0));
869
870 for (i = 0; i < possible; i++)
871 set_cpu_possible(i, true);
872 }
873
874 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
875 {
876 cpumask_t tmp_map;
877 int cpu;
878
879 cpumask_complement(&tmp_map, cpu_present_mask);
880 cpu = cpumask_first(&tmp_map);
881 if (cpu >= nr_cpu_ids)
882 return -EINVAL;
883
884 acpi_map_cpu2node(handle, cpu, physid);
885
886 set_cpu_present(cpu, true);
887 ia64_cpu_to_sapicid[cpu] = physid;
888
889 acpi_processor_set_pdc(handle);
890
891 *pcpu = cpu;
892 return (0);
893 }
894
895 /* wrapper to silence section mismatch warning */
896 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
897 {
898 return _acpi_map_lsapic(handle, physid, pcpu);
899 }
900 EXPORT_SYMBOL(acpi_map_lsapic);
901
902 int acpi_unmap_lsapic(int cpu)
903 {
904 ia64_cpu_to_sapicid[cpu] = -1;
905 set_cpu_present(cpu, false);
906
907 #ifdef CONFIG_ACPI_NUMA
908 /* NUMA specific cleanup's */
909 #endif
910
911 return (0);
912 }
913
914 EXPORT_SYMBOL(acpi_unmap_lsapic);
915 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
916
917 #ifdef CONFIG_ACPI_NUMA
918 static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
919 void *context, void **ret)
920 {
921 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
922 union acpi_object *obj;
923 struct acpi_madt_io_sapic *iosapic;
924 unsigned int gsi_base;
925 int node;
926
927 /* Only care about objects w/ a method that returns the MADT */
928 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
929 return AE_OK;
930
931 if (!buffer.length || !buffer.pointer)
932 return AE_OK;
933
934 obj = buffer.pointer;
935 if (obj->type != ACPI_TYPE_BUFFER ||
936 obj->buffer.length < sizeof(*iosapic)) {
937 kfree(buffer.pointer);
938 return AE_OK;
939 }
940
941 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
942
943 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
944 kfree(buffer.pointer);
945 return AE_OK;
946 }
947
948 gsi_base = iosapic->global_irq_base;
949
950 kfree(buffer.pointer);
951
952 /* OK, it's an IOSAPIC MADT entry; associate it with a node */
953 node = acpi_get_node(handle);
954 if (node == NUMA_NO_NODE || !node_online(node) ||
955 cpumask_empty(cpumask_of_node(node)))
956 return AE_OK;
957
958 /* We know a gsi to node mapping! */
959 map_iosapic_to_node(gsi_base, node);
960 return AE_OK;
961 }
962
963 static int __init
964 acpi_map_iosapics (void)
965 {
966 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
967 return 0;
968 }
969
970 fs_initcall(acpi_map_iosapics);
971 #endif /* CONFIG_ACPI_NUMA */
972
973 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
974 {
975 int err;
976
977 if ((err = iosapic_init(phys_addr, gsi_base)))
978 return err;
979
980 #ifdef CONFIG_ACPI_NUMA
981 acpi_map_iosapic(handle, 0, NULL, NULL);
982 #endif /* CONFIG_ACPI_NUMA */
983
984 return 0;
985 }
986
987 EXPORT_SYMBOL(acpi_register_ioapic);
988
989 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
990 {
991 return iosapic_remove(gsi_base);
992 }
993
994 EXPORT_SYMBOL(acpi_unregister_ioapic);
995
996 /*
997 * acpi_suspend_lowlevel() - save kernel state and suspend.
998 *
999 * TBD when when IA64 starts to support suspend...
1000 */
1001 int acpi_suspend_lowlevel(void) { return 0; }
Linux kernel - Deliverables
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