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x86/ACPI: keep x86_cpu_to_acpiid mapping valid on CPU hotplug
[thirdparty/kernel/stable.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 acpi_madt = (struct acpi_table_madt *)table;
384
385 acpi_madt_rev = acpi_madt->header.revision;
386
387 /* remember the value for reference after free_initmem() */
388 #ifdef CONFIG_ITANIUM
389 has_8259 = 1; /* Firmware on old Itanium systems is broken */
390 #else
391 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
392 #endif
393 iosapic_system_init(has_8259);
394
395 /* Get base address of IPI Message Block */
396
397 if (acpi_madt->address)
398 ipi_base_addr = ioremap(acpi_madt->address, 0);
399
400 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
401
402 acpi_madt_oem_check(acpi_madt->header.oem_id,
403 acpi_madt->header.oem_table_id);
404
405 return 0;
406 }
407
408 #ifdef CONFIG_ACPI_NUMA
409
410 #undef SLIT_DEBUG
411
412 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
413
414 static int __initdata srat_num_cpus; /* number of cpus */
415 static u32 pxm_flag[PXM_FLAG_LEN];
416 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
417 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
418 static struct acpi_table_slit __initdata *slit_table;
419 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
420
421 static int __init
422 get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
423 {
424 int pxm;
425
426 pxm = pa->proximity_domain_lo;
427 if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
428 pxm += pa->proximity_domain_hi[0] << 8;
429 return pxm;
430 }
431
432 static int __init
433 get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
434 {
435 int pxm;
436
437 pxm = ma->proximity_domain;
438 if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
439 pxm &= 0xff;
440
441 return pxm;
442 }
443
444 /*
445 * ACPI 2.0 SLIT (System Locality Information Table)
446 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
447 */
448 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
449 {
450 u32 len;
451
452 len = sizeof(struct acpi_table_header) + 8
453 + slit->locality_count * slit->locality_count;
454 if (slit->header.length != len) {
455 printk(KERN_ERR
456 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
457 len, slit->header.length);
458 return;
459 }
460 slit_table = slit;
461 }
462
463 void __init
464 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
465 {
466 int pxm;
467
468 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
469 return;
470
471 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
472 printk_once(KERN_WARNING
473 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
474 ARRAY_SIZE(node_cpuid));
475 return;
476 }
477 pxm = get_processor_proximity_domain(pa);
478
479 /* record this node in proximity bitmap */
480 pxm_bit_set(pxm);
481
482 node_cpuid[srat_num_cpus].phys_id =
483 (pa->apic_id << 8) | (pa->local_sapic_eid);
484 /* nid should be overridden as logical node id later */
485 node_cpuid[srat_num_cpus].nid = pxm;
486 cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map);
487 srat_num_cpus++;
488 }
489
490 int __init
491 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
492 {
493 unsigned long paddr, size;
494 int pxm;
495 struct node_memblk_s *p, *q, *pend;
496
497 pxm = get_memory_proximity_domain(ma);
498
499 /* fill node memory chunk structure */
500 paddr = ma->base_address;
501 size = ma->length;
502
503 /* Ignore disabled entries */
504 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
505 return -1;
506
507 /* record this node in proximity bitmap */
508 pxm_bit_set(pxm);
509
510 /* Insertion sort based on base address */
511 pend = &node_memblk[num_node_memblks];
512 for (p = &node_memblk[0]; p < pend; p++) {
513 if (paddr < p->start_paddr)
514 break;
515 }
516 if (p < pend) {
517 for (q = pend - 1; q >= p; q--)
518 *(q + 1) = *q;
519 }
520 p->start_paddr = paddr;
521 p->size = size;
522 p->nid = pxm;
523 num_node_memblks++;
524 return 0;
525 }
526
527 void __init acpi_numa_fixup(void)
528 {
529 int i, j, node_from, node_to;
530
531 /* If there's no SRAT, fix the phys_id and mark node 0 online */
532 if (srat_num_cpus == 0) {
533 node_set_online(0);
534 node_cpuid[0].phys_id = hard_smp_processor_id();
535 return;
536 }
537
538 /*
539 * MCD - This can probably be dropped now. No need for pxm ID to node ID
540 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
541 */
542 nodes_clear(node_online_map);
543 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
544 if (pxm_bit_test(i)) {
545 int nid = acpi_map_pxm_to_node(i);
546 node_set_online(nid);
547 }
548 }
549
550 /* set logical node id in memory chunk structure */
551 for (i = 0; i < num_node_memblks; i++)
552 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
553
554 /* assign memory bank numbers for each chunk on each node */
555 for_each_online_node(i) {
556 int bank;
557
558 bank = 0;
559 for (j = 0; j < num_node_memblks; j++)
560 if (node_memblk[j].nid == i)
561 node_memblk[j].bank = bank++;
562 }
563
564 /* set logical node id in cpu structure */
565 for_each_possible_early_cpu(i)
566 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
567
568 printk(KERN_INFO "Number of logical nodes in system = %d\n",
569 num_online_nodes());
570 printk(KERN_INFO "Number of memory chunks in system = %d\n",
571 num_node_memblks);
572
573 if (!slit_table) {
574 for (i = 0; i < MAX_NUMNODES; i++)
575 for (j = 0; j < MAX_NUMNODES; j++)
576 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
577 REMOTE_DISTANCE;
578 return;
579 }
580
581 memset(numa_slit, -1, sizeof(numa_slit));
582 for (i = 0; i < slit_table->locality_count; i++) {
583 if (!pxm_bit_test(i))
584 continue;
585 node_from = pxm_to_node(i);
586 for (j = 0; j < slit_table->locality_count; j++) {
587 if (!pxm_bit_test(j))
588 continue;
589 node_to = pxm_to_node(j);
590 node_distance(node_from, node_to) =
591 slit_table->entry[i * slit_table->locality_count + j];
592 }
593 }
594
595 #ifdef SLIT_DEBUG
596 printk("ACPI 2.0 SLIT locality table:\n");
597 for_each_online_node(i) {
598 for_each_online_node(j)
599 printk("%03d ", node_distance(i, j));
600 printk("\n");
601 }
602 #endif
603 }
604 #endif /* CONFIG_ACPI_NUMA */
605
606 /*
607 * success: return IRQ number (>=0)
608 * failure: return < 0
609 */
610 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
611 {
612 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
613 return gsi;
614
615 if (has_8259 && gsi < 16)
616 return isa_irq_to_vector(gsi);
617
618 return iosapic_register_intr(gsi,
619 (polarity ==
620 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
621 IOSAPIC_POL_LOW,
622 (triggering ==
623 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
624 IOSAPIC_LEVEL);
625 }
626 EXPORT_SYMBOL_GPL(acpi_register_gsi);
627
628 void acpi_unregister_gsi(u32 gsi)
629 {
630 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
631 return;
632
633 if (has_8259 && gsi < 16)
634 return;
635
636 iosapic_unregister_intr(gsi);
637 }
638 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
639
640 static int __init acpi_parse_fadt(struct acpi_table_header *table)
641 {
642 struct acpi_table_header *fadt_header;
643 struct acpi_table_fadt *fadt;
644
645 fadt_header = (struct acpi_table_header *)table;
646 if (fadt_header->revision != 3)
647 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
648
649 fadt = (struct acpi_table_fadt *)fadt_header;
650
651 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
652 ACPI_ACTIVE_LOW);
653 return 0;
654 }
655
656 int __init early_acpi_boot_init(void)
657 {
658 int ret;
659
660 /*
661 * do a partial walk of MADT to determine how many CPUs
662 * we have including offline CPUs
663 */
664 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
665 printk(KERN_ERR PREFIX "Can't find MADT\n");
666 return 0;
667 }
668
669 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
670 acpi_parse_lsapic, NR_CPUS);
671 if (ret < 1)
672 printk(KERN_ERR PREFIX
673 "Error parsing MADT - no LAPIC entries\n");
674 else
675 acpi_lapic = 1;
676
677 #ifdef CONFIG_SMP
678 if (available_cpus == 0) {
679 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
680 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
681 smp_boot_data.cpu_phys_id[available_cpus] =
682 hard_smp_processor_id();
683 available_cpus = 1; /* We've got at least one of these, no? */
684 }
685 smp_boot_data.cpu_count = available_cpus;
686 #endif
687 /* Make boot-up look pretty */
688 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
689 total_cpus);
690
691 return 0;
692 }
693
694 int __init acpi_boot_init(void)
695 {
696
697 /*
698 * MADT
699 * ----
700 * Parse the Multiple APIC Description Table (MADT), if exists.
701 * Note that this table provides platform SMP configuration
702 * information -- the successor to MPS tables.
703 */
704
705 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
706 printk(KERN_ERR PREFIX "Can't find MADT\n");
707 goto skip_madt;
708 }
709
710 /* Local APIC */
711
712 if (acpi_table_parse_madt
713 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
714 printk(KERN_ERR PREFIX
715 "Error parsing LAPIC address override entry\n");
716
717 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
718 < 0)
719 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
720
721 /* I/O APIC */
722
723 if (acpi_table_parse_madt
724 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
725 if (!ia64_platform_is("sn2"))
726 printk(KERN_ERR PREFIX
727 "Error parsing MADT - no IOSAPIC entries\n");
728 }
729
730 /* System-Level Interrupt Routing */
731
732 if (acpi_table_parse_madt
733 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
734 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
735 printk(KERN_ERR PREFIX
736 "Error parsing platform interrupt source entry\n");
737
738 if (acpi_table_parse_madt
739 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
740 printk(KERN_ERR PREFIX
741 "Error parsing interrupt source overrides entry\n");
742
743 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
744 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
745 skip_madt:
746
747 /*
748 * FADT says whether a legacy keyboard controller is present.
749 * The FADT also contains an SCI_INT line, by which the system
750 * gets interrupts such as power and sleep buttons. If it's not
751 * on a Legacy interrupt, it needs to be setup.
752 */
753 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
754 printk(KERN_ERR PREFIX "Can't find FADT\n");
755
756 #ifdef CONFIG_ACPI_NUMA
757 #ifdef CONFIG_SMP
758 if (srat_num_cpus == 0) {
759 int cpu, i = 1;
760 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
761 if (smp_boot_data.cpu_phys_id[cpu] !=
762 hard_smp_processor_id())
763 node_cpuid[i++].phys_id =
764 smp_boot_data.cpu_phys_id[cpu];
765 }
766 #endif
767 build_cpu_to_node_map();
768 #endif
769 return 0;
770 }
771
772 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
773 {
774 int tmp;
775
776 if (has_8259 && gsi < 16)
777 *irq = isa_irq_to_vector(gsi);
778 else {
779 tmp = gsi_to_irq(gsi);
780 if (tmp == -1)
781 return -1;
782 *irq = tmp;
783 }
784 return 0;
785 }
786
787 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
788 {
789 if (isa_irq >= 16)
790 return -1;
791 *gsi = isa_irq;
792 return 0;
793 }
794
795 /*
796 * ACPI based hotplug CPU support
797 */
798 #ifdef CONFIG_ACPI_HOTPLUG_CPU
799 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
800 {
801 #ifdef CONFIG_ACPI_NUMA
802 /*
803 * We don't have cpu-only-node hotadd. But if the system equips
804 * SRAT table, pxm is already found and node is ready.
805 * So, just pxm_to_nid(pxm) is OK.
806 * This code here is for the system which doesn't have full SRAT
807 * table for possible cpus.
808 */
809 node_cpuid[cpu].phys_id = physid;
810 node_cpuid[cpu].nid = acpi_get_node(handle);
811 #endif
812 return 0;
813 }
814
815 int additional_cpus __initdata = -1;
816
817 static __init int setup_additional_cpus(char *s)
818 {
819 if (s)
820 additional_cpus = simple_strtol(s, NULL, 0);
821
822 return 0;
823 }
824
825 early_param("additional_cpus", setup_additional_cpus);
826
827 /*
828 * cpu_possible_mask should be static, it cannot change as CPUs
829 * are onlined, or offlined. The reason is per-cpu data-structures
830 * are allocated by some modules at init time, and dont expect to
831 * do this dynamically on cpu arrival/departure.
832 * cpu_present_mask on the other hand can change dynamically.
833 * In case when cpu_hotplug is not compiled, then we resort to current
834 * behaviour, which is cpu_possible == cpu_present.
835 * - Ashok Raj
836 *
837 * Three ways to find out the number of additional hotplug CPUs:
838 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
839 * - The user can overwrite it with additional_cpus=NUM
840 * - Otherwise don't reserve additional CPUs.
841 */
842 __init void prefill_possible_map(void)
843 {
844 int i;
845 int possible, disabled_cpus;
846
847 disabled_cpus = total_cpus - available_cpus;
848
849 if (additional_cpus == -1) {
850 if (disabled_cpus > 0)
851 additional_cpus = disabled_cpus;
852 else
853 additional_cpus = 0;
854 }
855
856 possible = available_cpus + additional_cpus;
857
858 if (possible > nr_cpu_ids)
859 possible = nr_cpu_ids;
860
861 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
862 possible, max((possible - available_cpus), 0));
863
864 for (i = 0; i < possible; i++)
865 set_cpu_possible(i, true);
866 }
867
868 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
869 {
870 cpumask_t tmp_map;
871 int cpu;
872
873 cpumask_complement(&tmp_map, cpu_present_mask);
874 cpu = cpumask_first(&tmp_map);
875 if (cpu >= nr_cpu_ids)
876 return -EINVAL;
877
878 acpi_map_cpu2node(handle, cpu, physid);
879
880 set_cpu_present(cpu, true);
881 ia64_cpu_to_sapicid[cpu] = physid;
882
883 acpi_processor_set_pdc(handle);
884
885 *pcpu = cpu;
886 return (0);
887 }
888
889 /* wrapper to silence section mismatch warning */
890 int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
891 int *pcpu)
892 {
893 return _acpi_map_lsapic(handle, physid, pcpu);
894 }
895 EXPORT_SYMBOL(acpi_map_cpu);
896
897 int acpi_unmap_cpu(int cpu)
898 {
899 ia64_cpu_to_sapicid[cpu] = -1;
900 set_cpu_present(cpu, false);
901
902 #ifdef CONFIG_ACPI_NUMA
903 /* NUMA specific cleanup's */
904 #endif
905
906 return (0);
907 }
908 EXPORT_SYMBOL(acpi_unmap_cpu);
909 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
910
911 #ifdef CONFIG_ACPI_NUMA
912 static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
913 void *context, void **ret)
914 {
915 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
916 union acpi_object *obj;
917 struct acpi_madt_io_sapic *iosapic;
918 unsigned int gsi_base;
919 int node;
920
921 /* Only care about objects w/ a method that returns the MADT */
922 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
923 return AE_OK;
924
925 if (!buffer.length || !buffer.pointer)
926 return AE_OK;
927
928 obj = buffer.pointer;
929 if (obj->type != ACPI_TYPE_BUFFER ||
930 obj->buffer.length < sizeof(*iosapic)) {
931 kfree(buffer.pointer);
932 return AE_OK;
933 }
934
935 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
936
937 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
938 kfree(buffer.pointer);
939 return AE_OK;
940 }
941
942 gsi_base = iosapic->global_irq_base;
943
944 kfree(buffer.pointer);
945
946 /* OK, it's an IOSAPIC MADT entry; associate it with a node */
947 node = acpi_get_node(handle);
948 if (node == NUMA_NO_NODE || !node_online(node) ||
949 cpumask_empty(cpumask_of_node(node)))
950 return AE_OK;
951
952 /* We know a gsi to node mapping! */
953 map_iosapic_to_node(gsi_base, node);
954 return AE_OK;
955 }
956
957 static int __init
958 acpi_map_iosapics (void)
959 {
960 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
961 return 0;
962 }
963
964 fs_initcall(acpi_map_iosapics);
965 #endif /* CONFIG_ACPI_NUMA */
966
967 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
968 {
969 int err;
970
971 if ((err = iosapic_init(phys_addr, gsi_base)))
972 return err;
973
974 #ifdef CONFIG_ACPI_NUMA
975 acpi_map_iosapic(handle, 0, NULL, NULL);
976 #endif /* CONFIG_ACPI_NUMA */
977
978 return 0;
979 }
980
981 EXPORT_SYMBOL(acpi_register_ioapic);
982
983 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
984 {
985 return iosapic_remove(gsi_base);
986 }
987
988 EXPORT_SYMBOL(acpi_unregister_ioapic);
989
990 /*
991 * acpi_suspend_lowlevel() - save kernel state and suspend.
992 *
993 * TBD when when IA64 starts to support suspend...
994 */
995 int acpi_suspend_lowlevel(void) { return 0; }
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git