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Merge branch 'pci/resource' into next
[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 BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61 #define PREFIX "ACPI: "
62
63 unsigned int acpi_cpei_override;
64 unsigned int acpi_cpei_phys_cpuid;
65
66 unsigned long acpi_wakeup_address = 0;
67
68 #ifdef CONFIG_IA64_GENERIC
69 static unsigned long __init acpi_find_rsdp(void)
70 {
71 unsigned long rsdp_phys = 0;
72
73 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
74 rsdp_phys = efi.acpi20;
75 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
76 printk(KERN_WARNING PREFIX
77 "v1.0/r0.71 tables no longer supported\n");
78 return rsdp_phys;
79 }
80
81 const char __init *
82 acpi_get_sysname(void)
83 {
84 unsigned long rsdp_phys;
85 struct acpi_table_rsdp *rsdp;
86 struct acpi_table_xsdt *xsdt;
87 struct acpi_table_header *hdr;
88 #ifdef CONFIG_INTEL_IOMMU
89 u64 i, nentries;
90 #endif
91
92 rsdp_phys = acpi_find_rsdp();
93 if (!rsdp_phys) {
94 printk(KERN_ERR
95 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
96 return "dig";
97 }
98
99 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
100 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
101 printk(KERN_ERR
102 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
103 return "dig";
104 }
105
106 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
107 hdr = &xsdt->header;
108 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
109 printk(KERN_ERR
110 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
111 return "dig";
112 }
113
114 if (!strcmp(hdr->oem_id, "HP")) {
115 return "hpzx1";
116 } else if (!strcmp(hdr->oem_id, "SGI")) {
117 if (!strcmp(hdr->oem_table_id + 4, "UV"))
118 return "uv";
119 else
120 return "sn2";
121 }
122
123 #ifdef CONFIG_INTEL_IOMMU
124 /* Look for Intel IOMMU */
125 nentries = (hdr->length - sizeof(*hdr)) /
126 sizeof(xsdt->table_offset_entry[0]);
127 for (i = 0; i < nentries; i++) {
128 hdr = __va(xsdt->table_offset_entry[i]);
129 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
130 sizeof(ACPI_SIG_DMAR) - 1) == 0)
131 return "dig_vtd";
132 }
133 #endif
134
135 return "dig";
136 }
137 #endif /* CONFIG_IA64_GENERIC */
138
139 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
140
141 /* Array to record platform interrupt vectors for generic interrupt routing. */
142 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
143 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
144 };
145
146 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
147
148 /*
149 * Interrupt routing API for device drivers. Provides interrupt vector for
150 * a generic platform event. Currently only CPEI is implemented.
151 */
152 int acpi_request_vector(u32 int_type)
153 {
154 int vector = -1;
155
156 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
157 /* corrected platform error interrupt */
158 vector = platform_intr_list[int_type];
159 } else
160 printk(KERN_ERR
161 "acpi_request_vector(): invalid interrupt type\n");
162 return vector;
163 }
164
165 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
166 {
167 return __va(phys_addr);
168 }
169
170 void __init __acpi_unmap_table(char *map, unsigned long size)
171 {
172 }
173
174 /* --------------------------------------------------------------------------
175 Boot-time Table Parsing
176 -------------------------------------------------------------------------- */
177
178 static int available_cpus __initdata;
179 struct acpi_table_madt *acpi_madt __initdata;
180 static u8 has_8259;
181
182 static int __init
183 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
184 const unsigned long end)
185 {
186 struct acpi_madt_local_apic_override *lapic;
187
188 lapic = (struct acpi_madt_local_apic_override *)header;
189
190 if (BAD_MADT_ENTRY(lapic, end))
191 return -EINVAL;
192
193 if (lapic->address) {
194 iounmap(ipi_base_addr);
195 ipi_base_addr = ioremap(lapic->address, 0);
196 }
197 return 0;
198 }
199
200 static int __init
201 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
202 {
203 struct acpi_madt_local_sapic *lsapic;
204
205 lsapic = (struct acpi_madt_local_sapic *)header;
206
207 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
208
209 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
210 #ifdef CONFIG_SMP
211 smp_boot_data.cpu_phys_id[available_cpus] =
212 (lsapic->id << 8) | lsapic->eid;
213 #endif
214 ++available_cpus;
215 }
216
217 total_cpus++;
218 return 0;
219 }
220
221 static int __init
222 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
223 {
224 struct acpi_madt_local_apic_nmi *lacpi_nmi;
225
226 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
227
228 if (BAD_MADT_ENTRY(lacpi_nmi, end))
229 return -EINVAL;
230
231 /* TBD: Support lapic_nmi entries */
232 return 0;
233 }
234
235 static int __init
236 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
237 {
238 struct acpi_madt_io_sapic *iosapic;
239
240 iosapic = (struct acpi_madt_io_sapic *)header;
241
242 if (BAD_MADT_ENTRY(iosapic, end))
243 return -EINVAL;
244
245 return iosapic_init(iosapic->address, iosapic->global_irq_base);
246 }
247
248 static unsigned int __initdata acpi_madt_rev;
249
250 static int __init
251 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
252 const unsigned long end)
253 {
254 struct acpi_madt_interrupt_source *plintsrc;
255 int vector;
256
257 plintsrc = (struct acpi_madt_interrupt_source *)header;
258
259 if (BAD_MADT_ENTRY(plintsrc, end))
260 return -EINVAL;
261
262 /*
263 * Get vector assignment for this interrupt, set attributes,
264 * and program the IOSAPIC routing table.
265 */
266 vector = iosapic_register_platform_intr(plintsrc->type,
267 plintsrc->global_irq,
268 plintsrc->io_sapic_vector,
269 plintsrc->eid,
270 plintsrc->id,
271 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
272 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
273 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
274 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
275 ACPI_MADT_TRIGGER_EDGE) ?
276 IOSAPIC_EDGE : IOSAPIC_LEVEL);
277
278 platform_intr_list[plintsrc->type] = vector;
279 if (acpi_madt_rev > 1) {
280 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
281 }
282
283 /*
284 * Save the physical id, so we can check when its being removed
285 */
286 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
287
288 return 0;
289 }
290
291 #ifdef CONFIG_HOTPLUG_CPU
292 unsigned int can_cpei_retarget(void)
293 {
294 extern int cpe_vector;
295 extern unsigned int force_cpei_retarget;
296
297 /*
298 * Only if CPEI is supported and the override flag
299 * is present, otherwise return that its re-targettable
300 * if we are in polling mode.
301 */
302 if (cpe_vector > 0) {
303 if (acpi_cpei_override || force_cpei_retarget)
304 return 1;
305 else
306 return 0;
307 }
308 return 1;
309 }
310
311 unsigned int is_cpu_cpei_target(unsigned int cpu)
312 {
313 unsigned int logical_id;
314
315 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
316
317 if (logical_id == cpu)
318 return 1;
319 else
320 return 0;
321 }
322
323 void set_cpei_target_cpu(unsigned int cpu)
324 {
325 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
326 }
327 #endif
328
329 unsigned int get_cpei_target_cpu(void)
330 {
331 return acpi_cpei_phys_cpuid;
332 }
333
334 static int __init
335 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
336 const unsigned long end)
337 {
338 struct acpi_madt_interrupt_override *p;
339
340 p = (struct acpi_madt_interrupt_override *)header;
341
342 if (BAD_MADT_ENTRY(p, end))
343 return -EINVAL;
344
345 iosapic_override_isa_irq(p->source_irq, p->global_irq,
346 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
347 ACPI_MADT_POLARITY_ACTIVE_LOW) ?
348 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
349 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
350 ACPI_MADT_TRIGGER_LEVEL) ?
351 IOSAPIC_LEVEL : IOSAPIC_EDGE);
352 return 0;
353 }
354
355 static int __init
356 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
357 {
358 struct acpi_madt_nmi_source *nmi_src;
359
360 nmi_src = (struct acpi_madt_nmi_source *)header;
361
362 if (BAD_MADT_ENTRY(nmi_src, end))
363 return -EINVAL;
364
365 /* TBD: Support nimsrc entries */
366 return 0;
367 }
368
369 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
370 {
371 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
372
373 /*
374 * Unfortunately ITC_DRIFT is not yet part of the
375 * official SAL spec, so the ITC_DRIFT bit is not
376 * set by the BIOS on this hardware.
377 */
378 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
379
380 cyclone_setup();
381 }
382 }
383
384 static int __init acpi_parse_madt(struct acpi_table_header *table)
385 {
386 if (!table)
387 return -EINVAL;
388
389 acpi_madt = (struct acpi_table_madt *)table;
390
391 acpi_madt_rev = acpi_madt->header.revision;
392
393 /* remember the value for reference after free_initmem() */
394 #ifdef CONFIG_ITANIUM
395 has_8259 = 1; /* Firmware on old Itanium systems is broken */
396 #else
397 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
398 #endif
399 iosapic_system_init(has_8259);
400
401 /* Get base address of IPI Message Block */
402
403 if (acpi_madt->address)
404 ipi_base_addr = ioremap(acpi_madt->address, 0);
405
406 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
407
408 acpi_madt_oem_check(acpi_madt->header.oem_id,
409 acpi_madt->header.oem_table_id);
410
411 return 0;
412 }
413
414 #ifdef CONFIG_ACPI_NUMA
415
416 #undef SLIT_DEBUG
417
418 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
419
420 static int __initdata srat_num_cpus; /* number of cpus */
421 static u32 pxm_flag[PXM_FLAG_LEN];
422 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
423 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
424 static struct acpi_table_slit __initdata *slit_table;
425 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
426
427 static int __init
428 get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
429 {
430 int pxm;
431
432 pxm = pa->proximity_domain_lo;
433 if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
434 pxm += pa->proximity_domain_hi[0] << 8;
435 return pxm;
436 }
437
438 static int __init
439 get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
440 {
441 int pxm;
442
443 pxm = ma->proximity_domain;
444 if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
445 pxm &= 0xff;
446
447 return pxm;
448 }
449
450 /*
451 * ACPI 2.0 SLIT (System Locality Information Table)
452 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
453 */
454 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
455 {
456 u32 len;
457
458 len = sizeof(struct acpi_table_header) + 8
459 + slit->locality_count * slit->locality_count;
460 if (slit->header.length != len) {
461 printk(KERN_ERR
462 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
463 len, slit->header.length);
464 return;
465 }
466 slit_table = slit;
467 }
468
469 void __init
470 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
471 {
472 int pxm;
473
474 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
475 return;
476
477 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
478 printk_once(KERN_WARNING
479 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
480 ARRAY_SIZE(node_cpuid));
481 return;
482 }
483 pxm = get_processor_proximity_domain(pa);
484
485 /* record this node in proximity bitmap */
486 pxm_bit_set(pxm);
487
488 node_cpuid[srat_num_cpus].phys_id =
489 (pa->apic_id << 8) | (pa->local_sapic_eid);
490 /* nid should be overridden as logical node id later */
491 node_cpuid[srat_num_cpus].nid = pxm;
492 cpu_set(srat_num_cpus, early_cpu_possible_map);
493 srat_num_cpus++;
494 }
495
496 int __init
497 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
498 {
499 unsigned long paddr, size;
500 int pxm;
501 struct node_memblk_s *p, *q, *pend;
502
503 pxm = get_memory_proximity_domain(ma);
504
505 /* fill node memory chunk structure */
506 paddr = ma->base_address;
507 size = ma->length;
508
509 /* Ignore disabled entries */
510 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
511 return -1;
512
513 /* record this node in proximity bitmap */
514 pxm_bit_set(pxm);
515
516 /* Insertion sort based on base address */
517 pend = &node_memblk[num_node_memblks];
518 for (p = &node_memblk[0]; p < pend; p++) {
519 if (paddr < p->start_paddr)
520 break;
521 }
522 if (p < pend) {
523 for (q = pend - 1; q >= p; q--)
524 *(q + 1) = *q;
525 }
526 p->start_paddr = paddr;
527 p->size = size;
528 p->nid = pxm;
529 num_node_memblks++;
530 return 0;
531 }
532
533 void __init acpi_numa_arch_fixup(void)
534 {
535 int i, j, node_from, node_to;
536
537 /* If there's no SRAT, fix the phys_id and mark node 0 online */
538 if (srat_num_cpus == 0) {
539 node_set_online(0);
540 node_cpuid[0].phys_id = hard_smp_processor_id();
541 return;
542 }
543
544 /*
545 * MCD - This can probably be dropped now. No need for pxm ID to node ID
546 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
547 */
548 nodes_clear(node_online_map);
549 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
550 if (pxm_bit_test(i)) {
551 int nid = acpi_map_pxm_to_node(i);
552 node_set_online(nid);
553 }
554 }
555
556 /* set logical node id in memory chunk structure */
557 for (i = 0; i < num_node_memblks; i++)
558 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
559
560 /* assign memory bank numbers for each chunk on each node */
561 for_each_online_node(i) {
562 int bank;
563
564 bank = 0;
565 for (j = 0; j < num_node_memblks; j++)
566 if (node_memblk[j].nid == i)
567 node_memblk[j].bank = bank++;
568 }
569
570 /* set logical node id in cpu structure */
571 for_each_possible_early_cpu(i)
572 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
573
574 printk(KERN_INFO "Number of logical nodes in system = %d\n",
575 num_online_nodes());
576 printk(KERN_INFO "Number of memory chunks in system = %d\n",
577 num_node_memblks);
578
579 if (!slit_table) {
580 for (i = 0; i < MAX_NUMNODES; i++)
581 for (j = 0; j < MAX_NUMNODES; j++)
582 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
583 REMOTE_DISTANCE;
584 return;
585 }
586
587 memset(numa_slit, -1, sizeof(numa_slit));
588 for (i = 0; i < slit_table->locality_count; i++) {
589 if (!pxm_bit_test(i))
590 continue;
591 node_from = pxm_to_node(i);
592 for (j = 0; j < slit_table->locality_count; j++) {
593 if (!pxm_bit_test(j))
594 continue;
595 node_to = pxm_to_node(j);
596 node_distance(node_from, node_to) =
597 slit_table->entry[i * slit_table->locality_count + j];
598 }
599 }
600
601 #ifdef SLIT_DEBUG
602 printk("ACPI 2.0 SLIT locality table:\n");
603 for_each_online_node(i) {
604 for_each_online_node(j)
605 printk("%03d ", node_distance(i, j));
606 printk("\n");
607 }
608 #endif
609 }
610 #endif /* CONFIG_ACPI_NUMA */
611
612 /*
613 * success: return IRQ number (>=0)
614 * failure: return < 0
615 */
616 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
617 {
618 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
619 return gsi;
620
621 if (has_8259 && gsi < 16)
622 return isa_irq_to_vector(gsi);
623
624 return iosapic_register_intr(gsi,
625 (polarity ==
626 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
627 IOSAPIC_POL_LOW,
628 (triggering ==
629 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
630 IOSAPIC_LEVEL);
631 }
632 EXPORT_SYMBOL_GPL(acpi_register_gsi);
633
634 void acpi_unregister_gsi(u32 gsi)
635 {
636 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
637 return;
638
639 if (has_8259 && gsi < 16)
640 return;
641
642 iosapic_unregister_intr(gsi);
643 }
644 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
645
646 static int __init acpi_parse_fadt(struct acpi_table_header *table)
647 {
648 struct acpi_table_header *fadt_header;
649 struct acpi_table_fadt *fadt;
650
651 if (!table)
652 return -EINVAL;
653
654 fadt_header = (struct acpi_table_header *)table;
655 if (fadt_header->revision != 3)
656 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
657
658 fadt = (struct acpi_table_fadt *)fadt_header;
659
660 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
661 ACPI_ACTIVE_LOW);
662 return 0;
663 }
664
665 int __init early_acpi_boot_init(void)
666 {
667 int ret;
668
669 /*
670 * do a partial walk of MADT to determine how many CPUs
671 * we have including offline CPUs
672 */
673 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
674 printk(KERN_ERR PREFIX "Can't find MADT\n");
675 return 0;
676 }
677
678 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
679 acpi_parse_lsapic, NR_CPUS);
680 if (ret < 1)
681 printk(KERN_ERR PREFIX
682 "Error parsing MADT - no LAPIC entries\n");
683
684 #ifdef CONFIG_SMP
685 if (available_cpus == 0) {
686 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
687 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
688 smp_boot_data.cpu_phys_id[available_cpus] =
689 hard_smp_processor_id();
690 available_cpus = 1; /* We've got at least one of these, no? */
691 }
692 smp_boot_data.cpu_count = available_cpus;
693 #endif
694 /* Make boot-up look pretty */
695 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
696 total_cpus);
697
698 return 0;
699 }
700
701 int __init acpi_boot_init(void)
702 {
703
704 /*
705 * MADT
706 * ----
707 * Parse the Multiple APIC Description Table (MADT), if exists.
708 * Note that this table provides platform SMP configuration
709 * information -- the successor to MPS tables.
710 */
711
712 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
713 printk(KERN_ERR PREFIX "Can't find MADT\n");
714 goto skip_madt;
715 }
716
717 /* Local APIC */
718
719 if (acpi_table_parse_madt
720 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
721 printk(KERN_ERR PREFIX
722 "Error parsing LAPIC address override entry\n");
723
724 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
725 < 0)
726 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
727
728 /* I/O APIC */
729
730 if (acpi_table_parse_madt
731 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
732 if (!ia64_platform_is("sn2"))
733 printk(KERN_ERR PREFIX
734 "Error parsing MADT - no IOSAPIC entries\n");
735 }
736
737 /* System-Level Interrupt Routing */
738
739 if (acpi_table_parse_madt
740 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
741 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
742 printk(KERN_ERR PREFIX
743 "Error parsing platform interrupt source entry\n");
744
745 if (acpi_table_parse_madt
746 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
747 printk(KERN_ERR PREFIX
748 "Error parsing interrupt source overrides entry\n");
749
750 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
751 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
752 skip_madt:
753
754 /*
755 * FADT says whether a legacy keyboard controller is present.
756 * The FADT also contains an SCI_INT line, by which the system
757 * gets interrupts such as power and sleep buttons. If it's not
758 * on a Legacy interrupt, it needs to be setup.
759 */
760 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
761 printk(KERN_ERR PREFIX "Can't find FADT\n");
762
763 #ifdef CONFIG_ACPI_NUMA
764 #ifdef CONFIG_SMP
765 if (srat_num_cpus == 0) {
766 int cpu, i = 1;
767 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
768 if (smp_boot_data.cpu_phys_id[cpu] !=
769 hard_smp_processor_id())
770 node_cpuid[i++].phys_id =
771 smp_boot_data.cpu_phys_id[cpu];
772 }
773 #endif
774 build_cpu_to_node_map();
775 #endif
776 return 0;
777 }
778
779 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
780 {
781 int tmp;
782
783 if (has_8259 && gsi < 16)
784 *irq = isa_irq_to_vector(gsi);
785 else {
786 tmp = gsi_to_irq(gsi);
787 if (tmp == -1)
788 return -1;
789 *irq = tmp;
790 }
791 return 0;
792 }
793
794 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
795 {
796 if (isa_irq >= 16)
797 return -1;
798 *gsi = isa_irq;
799 return 0;
800 }
801
802 /*
803 * ACPI based hotplug CPU support
804 */
805 #ifdef CONFIG_ACPI_HOTPLUG_CPU
806 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
807 {
808 #ifdef CONFIG_ACPI_NUMA
809 /*
810 * We don't have cpu-only-node hotadd. But if the system equips
811 * SRAT table, pxm is already found and node is ready.
812 * So, just pxm_to_nid(pxm) is OK.
813 * This code here is for the system which doesn't have full SRAT
814 * table for possible cpus.
815 */
816 node_cpuid[cpu].phys_id = physid;
817 node_cpuid[cpu].nid = acpi_get_node(handle);
818 #endif
819 return 0;
820 }
821
822 int additional_cpus __initdata = -1;
823
824 static __init int setup_additional_cpus(char *s)
825 {
826 if (s)
827 additional_cpus = simple_strtol(s, NULL, 0);
828
829 return 0;
830 }
831
832 early_param("additional_cpus", setup_additional_cpus);
833
834 /*
835 * cpu_possible_mask should be static, it cannot change as CPUs
836 * are onlined, or offlined. The reason is per-cpu data-structures
837 * are allocated by some modules at init time, and dont expect to
838 * do this dynamically on cpu arrival/departure.
839 * cpu_present_mask on the other hand can change dynamically.
840 * In case when cpu_hotplug is not compiled, then we resort to current
841 * behaviour, which is cpu_possible == cpu_present.
842 * - Ashok Raj
843 *
844 * Three ways to find out the number of additional hotplug CPUs:
845 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
846 * - The user can overwrite it with additional_cpus=NUM
847 * - Otherwise don't reserve additional CPUs.
848 */
849 __init void prefill_possible_map(void)
850 {
851 int i;
852 int possible, disabled_cpus;
853
854 disabled_cpus = total_cpus - available_cpus;
855
856 if (additional_cpus == -1) {
857 if (disabled_cpus > 0)
858 additional_cpus = disabled_cpus;
859 else
860 additional_cpus = 0;
861 }
862
863 possible = available_cpus + additional_cpus;
864
865 if (possible > nr_cpu_ids)
866 possible = nr_cpu_ids;
867
868 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
869 possible, max((possible - available_cpus), 0));
870
871 for (i = 0; i < possible; i++)
872 set_cpu_possible(i, true);
873 }
874
875 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
876 {
877 cpumask_t tmp_map;
878 int cpu;
879
880 cpumask_complement(&tmp_map, cpu_present_mask);
881 cpu = cpumask_first(&tmp_map);
882 if (cpu >= nr_cpu_ids)
883 return -EINVAL;
884
885 acpi_map_cpu2node(handle, cpu, physid);
886
887 set_cpu_present(cpu, true);
888 ia64_cpu_to_sapicid[cpu] = physid;
889
890 acpi_processor_set_pdc(handle);
891
892 *pcpu = cpu;
893 return (0);
894 }
895
896 /* wrapper to silence section mismatch warning */
897 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
898 {
899 return _acpi_map_lsapic(handle, physid, pcpu);
900 }
901 EXPORT_SYMBOL(acpi_map_lsapic);
902
903 int acpi_unmap_lsapic(int cpu)
904 {
905 ia64_cpu_to_sapicid[cpu] = -1;
906 set_cpu_present(cpu, false);
907
908 #ifdef CONFIG_ACPI_NUMA
909 /* NUMA specific cleanup's */
910 #endif
911
912 return (0);
913 }
914
915 EXPORT_SYMBOL(acpi_unmap_lsapic);
916 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
917
918 #ifdef CONFIG_ACPI_NUMA
919 static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
920 void *context, void **ret)
921 {
922 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
923 union acpi_object *obj;
924 struct acpi_madt_io_sapic *iosapic;
925 unsigned int gsi_base;
926 int node;
927
928 /* Only care about objects w/ a method that returns the MADT */
929 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
930 return AE_OK;
931
932 if (!buffer.length || !buffer.pointer)
933 return AE_OK;
934
935 obj = buffer.pointer;
936 if (obj->type != ACPI_TYPE_BUFFER ||
937 obj->buffer.length < sizeof(*iosapic)) {
938 kfree(buffer.pointer);
939 return AE_OK;
940 }
941
942 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
943
944 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
945 kfree(buffer.pointer);
946 return AE_OK;
947 }
948
949 gsi_base = iosapic->global_irq_base;
950
951 kfree(buffer.pointer);
952
953 /* OK, it's an IOSAPIC MADT entry; associate it with a node */
954 node = acpi_get_node(handle);
955 if (node == NUMA_NO_NODE || !node_online(node) ||
956 cpumask_empty(cpumask_of_node(node)))
957 return AE_OK;
958
959 /* We know a gsi to node mapping! */
960 map_iosapic_to_node(gsi_base, node);
961 return AE_OK;
962 }
963
964 static int __init
965 acpi_map_iosapics (void)
966 {
967 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
968 return 0;
969 }
970
971 fs_initcall(acpi_map_iosapics);
972 #endif /* CONFIG_ACPI_NUMA */
973
974 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
975 {
976 int err;
977
978 if ((err = iosapic_init(phys_addr, gsi_base)))
979 return err;
980
981 #ifdef CONFIG_ACPI_NUMA
982 acpi_map_iosapic(handle, 0, NULL, NULL);
983 #endif /* CONFIG_ACPI_NUMA */
984
985 return 0;
986 }
987
988 EXPORT_SYMBOL(acpi_register_ioapic);
989
990 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
991 {
992 return iosapic_remove(gsi_base);
993 }
994
995 EXPORT_SYMBOL(acpi_unregister_ioapic);
996
997 /*
998 * acpi_suspend_lowlevel() - save kernel state and suspend.
999 *
1000 * TBD when when IA64 starts to support suspend...
1001 */
1002 int acpi_suspend_lowlevel(void) { return 0; }
Linux kernel - Deliverables
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