projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[IA64] Properly unregister legacy interrupts
[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 <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
56 #define BAD_MADT_ENTRY(entry, end) ( \
57 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
58 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
59
60 #define PREFIX "ACPI: "
61
62 void (*pm_idle) (void);
63 EXPORT_SYMBOL(pm_idle);
64 void (*pm_power_off) (void);
65 EXPORT_SYMBOL(pm_power_off);
66
67 unsigned int acpi_cpei_override;
68 unsigned int acpi_cpei_phys_cpuid;
69
70 unsigned long acpi_wakeup_address = 0;
71
72 #ifdef CONFIG_IA64_GENERIC
73 static unsigned long __init acpi_find_rsdp(void)
74 {
75 unsigned long rsdp_phys = 0;
76
77 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
78 rsdp_phys = efi.acpi20;
79 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
80 printk(KERN_WARNING PREFIX
81 "v1.0/r0.71 tables no longer supported\n");
82 return rsdp_phys;
83 }
84 #endif
85
86 const char __init *
87 acpi_get_sysname(void)
88 {
89 #ifdef CONFIG_IA64_GENERIC
90 unsigned long rsdp_phys;
91 struct acpi_table_rsdp *rsdp;
92 struct acpi_table_xsdt *xsdt;
93 struct acpi_table_header *hdr;
94
95 rsdp_phys = acpi_find_rsdp();
96 if (!rsdp_phys) {
97 printk(KERN_ERR
98 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
99 return "dig";
100 }
101
102 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
103 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
104 printk(KERN_ERR
105 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
106 return "dig";
107 }
108
109 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
110 hdr = &xsdt->header;
111 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
112 printk(KERN_ERR
113 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
114 return "dig";
115 }
116
117 if (!strcmp(hdr->oem_id, "HP")) {
118 return "hpzx1";
119 } else if (!strcmp(hdr->oem_id, "SGI")) {
120 if (!strcmp(hdr->oem_table_id + 4, "UV"))
121 return "uv";
122 else
123 return "sn2";
124 }
125
126 return "dig";
127 #else
128 # if defined (CONFIG_IA64_HP_SIM)
129 return "hpsim";
130 # elif defined (CONFIG_IA64_HP_ZX1)
131 return "hpzx1";
132 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
133 return "hpzx1_swiotlb";
134 # elif defined (CONFIG_IA64_SGI_SN2)
135 return "sn2";
136 # elif defined (CONFIG_IA64_SGI_UV)
137 return "uv";
138 # elif defined (CONFIG_IA64_DIG)
139 return "dig";
140 # else
141 # error Unknown platform. Fix acpi.c.
142 # endif
143 #endif
144 }
145
146 #ifdef CONFIG_ACPI
147
148 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
149
150 /* Array to record platform interrupt vectors for generic interrupt routing. */
151 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
152 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
153 };
154
155 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
156
157 /*
158 * Interrupt routing API for device drivers. Provides interrupt vector for
159 * a generic platform event. Currently only CPEI is implemented.
160 */
161 int acpi_request_vector(u32 int_type)
162 {
163 int vector = -1;
164
165 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
166 /* corrected platform error interrupt */
167 vector = platform_intr_list[int_type];
168 } else
169 printk(KERN_ERR
170 "acpi_request_vector(): invalid interrupt type\n");
171 return vector;
172 }
173
174 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
175 {
176 return __va(phys_addr);
177 }
178
179 /* --------------------------------------------------------------------------
180 Boot-time Table Parsing
181 -------------------------------------------------------------------------- */
182
183 static int total_cpus __initdata;
184 static int available_cpus __initdata;
185 struct acpi_table_madt *acpi_madt __initdata;
186 static u8 has_8259;
187
188 static int __init
189 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
190 const unsigned long end)
191 {
192 struct acpi_madt_local_apic_override *lapic;
193
194 lapic = (struct acpi_madt_local_apic_override *)header;
195
196 if (BAD_MADT_ENTRY(lapic, end))
197 return -EINVAL;
198
199 if (lapic->address) {
200 iounmap(ipi_base_addr);
201 ipi_base_addr = ioremap(lapic->address, 0);
202 }
203 return 0;
204 }
205
206 static int __init
207 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
208 {
209 struct acpi_madt_local_sapic *lsapic;
210
211 lsapic = (struct acpi_madt_local_sapic *)header;
212
213 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
214
215 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
216 #ifdef CONFIG_SMP
217 smp_boot_data.cpu_phys_id[available_cpus] =
218 (lsapic->id << 8) | lsapic->eid;
219 #endif
220 ++available_cpus;
221 }
222
223 total_cpus++;
224 return 0;
225 }
226
227 static int __init
228 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
229 {
230 struct acpi_madt_local_apic_nmi *lacpi_nmi;
231
232 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
233
234 if (BAD_MADT_ENTRY(lacpi_nmi, end))
235 return -EINVAL;
236
237 /* TBD: Support lapic_nmi entries */
238 return 0;
239 }
240
241 static int __init
242 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
243 {
244 struct acpi_madt_io_sapic *iosapic;
245
246 iosapic = (struct acpi_madt_io_sapic *)header;
247
248 if (BAD_MADT_ENTRY(iosapic, end))
249 return -EINVAL;
250
251 return iosapic_init(iosapic->address, iosapic->global_irq_base);
252 }
253
254 static unsigned int __initdata acpi_madt_rev;
255
256 static int __init
257 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
258 const unsigned long end)
259 {
260 struct acpi_madt_interrupt_source *plintsrc;
261 int vector;
262
263 plintsrc = (struct acpi_madt_interrupt_source *)header;
264
265 if (BAD_MADT_ENTRY(plintsrc, end))
266 return -EINVAL;
267
268 /*
269 * Get vector assignment for this interrupt, set attributes,
270 * and program the IOSAPIC routing table.
271 */
272 vector = iosapic_register_platform_intr(plintsrc->type,
273 plintsrc->global_irq,
274 plintsrc->io_sapic_vector,
275 plintsrc->eid,
276 plintsrc->id,
277 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
278 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
279 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
280 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
281 ACPI_MADT_TRIGGER_EDGE) ?
282 IOSAPIC_EDGE : IOSAPIC_LEVEL);
283
284 platform_intr_list[plintsrc->type] = vector;
285 if (acpi_madt_rev > 1) {
286 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
287 }
288
289 /*
290 * Save the physical id, so we can check when its being removed
291 */
292 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
293
294 return 0;
295 }
296
297 #ifdef CONFIG_HOTPLUG_CPU
298 unsigned int can_cpei_retarget(void)
299 {
300 extern int cpe_vector;
301 extern unsigned int force_cpei_retarget;
302
303 /*
304 * Only if CPEI is supported and the override flag
305 * is present, otherwise return that its re-targettable
306 * if we are in polling mode.
307 */
308 if (cpe_vector > 0) {
309 if (acpi_cpei_override || force_cpei_retarget)
310 return 1;
311 else
312 return 0;
313 }
314 return 1;
315 }
316
317 unsigned int is_cpu_cpei_target(unsigned int cpu)
318 {
319 unsigned int logical_id;
320
321 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
322
323 if (logical_id == cpu)
324 return 1;
325 else
326 return 0;
327 }
328
329 void set_cpei_target_cpu(unsigned int cpu)
330 {
331 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
332 }
333 #endif
334
335 unsigned int get_cpei_target_cpu(void)
336 {
337 return acpi_cpei_phys_cpuid;
338 }
339
340 static int __init
341 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
342 const unsigned long end)
343 {
344 struct acpi_madt_interrupt_override *p;
345
346 p = (struct acpi_madt_interrupt_override *)header;
347
348 if (BAD_MADT_ENTRY(p, end))
349 return -EINVAL;
350
351 iosapic_override_isa_irq(p->source_irq, p->global_irq,
352 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
353 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
354 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
355 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
356 ACPI_MADT_TRIGGER_EDGE) ?
357 IOSAPIC_EDGE : IOSAPIC_LEVEL);
358 return 0;
359 }
360
361 static int __init
362 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
363 {
364 struct acpi_madt_nmi_source *nmi_src;
365
366 nmi_src = (struct acpi_madt_nmi_source *)header;
367
368 if (BAD_MADT_ENTRY(nmi_src, end))
369 return -EINVAL;
370
371 /* TBD: Support nimsrc entries */
372 return 0;
373 }
374
375 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
376 {
377 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
378
379 /*
380 * Unfortunately ITC_DRIFT is not yet part of the
381 * official SAL spec, so the ITC_DRIFT bit is not
382 * set by the BIOS on this hardware.
383 */
384 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
385
386 cyclone_setup();
387 }
388 }
389
390 static int __init acpi_parse_madt(struct acpi_table_header *table)
391 {
392 if (!table)
393 return -EINVAL;
394
395 acpi_madt = (struct acpi_table_madt *)table;
396
397 acpi_madt_rev = acpi_madt->header.revision;
398
399 /* remember the value for reference after free_initmem() */
400 #ifdef CONFIG_ITANIUM
401 has_8259 = 1; /* Firmware on old Itanium systems is broken */
402 #else
403 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
404 #endif
405 iosapic_system_init(has_8259);
406
407 /* Get base address of IPI Message Block */
408
409 if (acpi_madt->address)
410 ipi_base_addr = ioremap(acpi_madt->address, 0);
411
412 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
413
414 acpi_madt_oem_check(acpi_madt->header.oem_id,
415 acpi_madt->header.oem_table_id);
416
417 return 0;
418 }
419
420 #ifdef CONFIG_ACPI_NUMA
421
422 #undef SLIT_DEBUG
423
424 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
425
426 static int __initdata srat_num_cpus; /* number of cpus */
427 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
428 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
429 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
430 static struct acpi_table_slit __initdata *slit_table;
431 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
432
433 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
434 {
435 int pxm;
436
437 pxm = pa->proximity_domain_lo;
438 if (ia64_platform_is("sn2"))
439 pxm += pa->proximity_domain_hi[0] << 8;
440 return pxm;
441 }
442
443 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
444 {
445 int pxm;
446
447 pxm = ma->proximity_domain;
448 if (!ia64_platform_is("sn2"))
449 pxm &= 0xff;
450
451 return pxm;
452 }
453
454 /*
455 * ACPI 2.0 SLIT (System Locality Information Table)
456 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
457 */
458 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
459 {
460 u32 len;
461
462 len = sizeof(struct acpi_table_header) + 8
463 + slit->locality_count * slit->locality_count;
464 if (slit->header.length != len) {
465 printk(KERN_ERR
466 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
467 len, slit->header.length);
468 memset(numa_slit, 10, sizeof(numa_slit));
469 return;
470 }
471 slit_table = slit;
472 }
473
474 void __init
475 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
476 {
477 int pxm;
478
479 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
480 return;
481
482 pxm = get_processor_proximity_domain(pa);
483
484 /* record this node in proximity bitmap */
485 pxm_bit_set(pxm);
486
487 node_cpuid[srat_num_cpus].phys_id =
488 (pa->apic_id << 8) | (pa->local_sapic_eid);
489 /* nid should be overridden as logical node id later */
490 node_cpuid[srat_num_cpus].nid = pxm;
491 cpu_set(srat_num_cpus, early_cpu_possible_map);
492 srat_num_cpus++;
493 }
494
495 void __init
496 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
497 {
498 unsigned long paddr, size;
499 int pxm;
500 struct node_memblk_s *p, *q, *pend;
501
502 pxm = get_memory_proximity_domain(ma);
503
504 /* fill node memory chunk structure */
505 paddr = ma->base_address;
506 size = ma->length;
507
508 /* Ignore disabled entries */
509 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
510 return;
511
512 /* record this node in proximity bitmap */
513 pxm_bit_set(pxm);
514
515 /* Insertion sort based on base address */
516 pend = &node_memblk[num_node_memblks];
517 for (p = &node_memblk[0]; p < pend; p++) {
518 if (paddr < p->start_paddr)
519 break;
520 }
521 if (p < pend) {
522 for (q = pend - 1; q >= p; q--)
523 *(q + 1) = *q;
524 }
525 p->start_paddr = paddr;
526 p->size = size;
527 p->nid = pxm;
528 num_node_memblks++;
529 }
530
531 void __init acpi_numa_arch_fixup(void)
532 {
533 int i, j, node_from, node_to;
534
535 /* If there's no SRAT, fix the phys_id and mark node 0 online */
536 if (srat_num_cpus == 0) {
537 node_set_online(0);
538 node_cpuid[0].phys_id = hard_smp_processor_id();
539 return;
540 }
541
542 /*
543 * MCD - This can probably be dropped now. No need for pxm ID to node ID
544 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
545 */
546 nodes_clear(node_online_map);
547 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
548 if (pxm_bit_test(i)) {
549 int nid = acpi_map_pxm_to_node(i);
550 node_set_online(nid);
551 }
552 }
553
554 /* set logical node id in memory chunk structure */
555 for (i = 0; i < num_node_memblks; i++)
556 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
557
558 /* assign memory bank numbers for each chunk on each node */
559 for_each_online_node(i) {
560 int bank;
561
562 bank = 0;
563 for (j = 0; j < num_node_memblks; j++)
564 if (node_memblk[j].nid == i)
565 node_memblk[j].bank = bank++;
566 }
567
568 /* set logical node id in cpu structure */
569 for_each_possible_early_cpu(i)
570 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
571
572 printk(KERN_INFO "Number of logical nodes in system = %d\n",
573 num_online_nodes());
574 printk(KERN_INFO "Number of memory chunks in system = %d\n",
575 num_node_memblks);
576
577 if (!slit_table)
578 return;
579 memset(numa_slit, -1, sizeof(numa_slit));
580 for (i = 0; i < slit_table->locality_count; i++) {
581 if (!pxm_bit_test(i))
582 continue;
583 node_from = pxm_to_node(i);
584 for (j = 0; j < slit_table->locality_count; j++) {
585 if (!pxm_bit_test(j))
586 continue;
587 node_to = pxm_to_node(j);
588 node_distance(node_from, node_to) =
589 slit_table->entry[i * slit_table->locality_count + j];
590 }
591 }
592
593 #ifdef SLIT_DEBUG
594 printk("ACPI 2.0 SLIT locality table:\n");
595 for_each_online_node(i) {
596 for_each_online_node(j)
597 printk("%03d ", node_distance(i, j));
598 printk("\n");
599 }
600 #endif
601 }
602 #endif /* CONFIG_ACPI_NUMA */
603
604 /*
605 * success: return IRQ number (>=0)
606 * failure: return < 0
607 */
608 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
609 {
610 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
611 return gsi;
612
613 if (has_8259 && gsi < 16)
614 return isa_irq_to_vector(gsi);
615
616 return iosapic_register_intr(gsi,
617 (polarity ==
618 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
619 IOSAPIC_POL_LOW,
620 (triggering ==
621 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
622 IOSAPIC_LEVEL);
623 }
624
625 void acpi_unregister_gsi(u32 gsi)
626 {
627 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
628 return;
629
630 if (has_8259 && gsi < 16)
631 return;
632
633 iosapic_unregister_intr(gsi);
634 }
635
636 static int __init acpi_parse_fadt(struct acpi_table_header *table)
637 {
638 struct acpi_table_header *fadt_header;
639 struct acpi_table_fadt *fadt;
640
641 if (!table)
642 return -EINVAL;
643
644 fadt_header = (struct acpi_table_header *)table;
645 if (fadt_header->revision != 3)
646 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
647
648 fadt = (struct acpi_table_fadt *)fadt_header;
649
650 acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
651 return 0;
652 }
653
654 int __init acpi_boot_init(void)
655 {
656
657 /*
658 * MADT
659 * ----
660 * Parse the Multiple APIC Description Table (MADT), if exists.
661 * Note that this table provides platform SMP configuration
662 * information -- the successor to MPS tables.
663 */
664
665 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
666 printk(KERN_ERR PREFIX "Can't find MADT\n");
667 goto skip_madt;
668 }
669
670 /* Local APIC */
671
672 if (acpi_table_parse_madt
673 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
674 printk(KERN_ERR PREFIX
675 "Error parsing LAPIC address override entry\n");
676
677 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
678 < 1)
679 printk(KERN_ERR PREFIX
680 "Error parsing MADT - no LAPIC entries\n");
681
682 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
683 < 0)
684 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
685
686 /* I/O APIC */
687
688 if (acpi_table_parse_madt
689 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
690 if (!ia64_platform_is("sn2"))
691 printk(KERN_ERR PREFIX
692 "Error parsing MADT - no IOSAPIC entries\n");
693 }
694
695 /* System-Level Interrupt Routing */
696
697 if (acpi_table_parse_madt
698 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
699 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
700 printk(KERN_ERR PREFIX
701 "Error parsing platform interrupt source entry\n");
702
703 if (acpi_table_parse_madt
704 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
705 printk(KERN_ERR PREFIX
706 "Error parsing interrupt source overrides entry\n");
707
708 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
709 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
710 skip_madt:
711
712 /*
713 * FADT says whether a legacy keyboard controller is present.
714 * The FADT also contains an SCI_INT line, by which the system
715 * gets interrupts such as power and sleep buttons. If it's not
716 * on a Legacy interrupt, it needs to be setup.
717 */
718 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
719 printk(KERN_ERR PREFIX "Can't find FADT\n");
720
721 #ifdef CONFIG_SMP
722 if (available_cpus == 0) {
723 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
724 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
725 smp_boot_data.cpu_phys_id[available_cpus] =
726 hard_smp_processor_id();
727 available_cpus = 1; /* We've got at least one of these, no? */
728 }
729 smp_boot_data.cpu_count = available_cpus;
730
731 smp_build_cpu_map();
732 # ifdef CONFIG_ACPI_NUMA
733 if (srat_num_cpus == 0) {
734 int cpu, i = 1;
735 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
736 if (smp_boot_data.cpu_phys_id[cpu] !=
737 hard_smp_processor_id())
738 node_cpuid[i++].phys_id =
739 smp_boot_data.cpu_phys_id[cpu];
740 }
741 # endif
742 #endif
743 #ifdef CONFIG_ACPI_NUMA
744 build_cpu_to_node_map();
745 #endif
746 /* Make boot-up look pretty */
747 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
748 total_cpus);
749 return 0;
750 }
751
752 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
753 {
754 int tmp;
755
756 if (has_8259 && gsi < 16)
757 *irq = isa_irq_to_vector(gsi);
758 else {
759 tmp = gsi_to_irq(gsi);
760 if (tmp == -1)
761 return -1;
762 *irq = tmp;
763 }
764 return 0;
765 }
766
767 /*
768 * ACPI based hotplug CPU support
769 */
770 #ifdef CONFIG_ACPI_HOTPLUG_CPU
771 static
772 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
773 {
774 #ifdef CONFIG_ACPI_NUMA
775 int pxm_id;
776 int nid;
777
778 pxm_id = acpi_get_pxm(handle);
779 /*
780 * We don't have cpu-only-node hotadd. But if the system equips
781 * SRAT table, pxm is already found and node is ready.
782 * So, just pxm_to_nid(pxm) is OK.
783 * This code here is for the system which doesn't have full SRAT
784 * table for possible cpus.
785 */
786 nid = acpi_map_pxm_to_node(pxm_id);
787 node_cpuid[cpu].phys_id = physid;
788 node_cpuid[cpu].nid = nid;
789 #endif
790 return (0);
791 }
792
793 int additional_cpus __initdata = -1;
794
795 static __init int setup_additional_cpus(char *s)
796 {
797 if (s)
798 additional_cpus = simple_strtol(s, NULL, 0);
799
800 return 0;
801 }
802
803 early_param("additional_cpus", setup_additional_cpus);
804
805 /*
806 * cpu_possible_map should be static, it cannot change as CPUs
807 * are onlined, or offlined. The reason is per-cpu data-structures
808 * are allocated by some modules at init time, and dont expect to
809 * do this dynamically on cpu arrival/departure.
810 * cpu_present_map on the other hand can change dynamically.
811 * In case when cpu_hotplug is not compiled, then we resort to current
812 * behaviour, which is cpu_possible == cpu_present.
813 * - Ashok Raj
814 *
815 * Three ways to find out the number of additional hotplug CPUs:
816 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
817 * - The user can overwrite it with additional_cpus=NUM
818 * - Otherwise don't reserve additional CPUs.
819 */
820 __init void prefill_possible_map(void)
821 {
822 int i;
823 int possible, disabled_cpus;
824
825 disabled_cpus = total_cpus - available_cpus;
826
827 if (additional_cpus == -1) {
828 if (disabled_cpus > 0)
829 additional_cpus = disabled_cpus;
830 else
831 additional_cpus = 0;
832 }
833
834 possible = available_cpus + additional_cpus;
835
836 if (possible > NR_CPUS)
837 possible = NR_CPUS;
838
839 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
840 possible, max((possible - available_cpus), 0));
841
842 for (i = 0; i < possible; i++)
843 cpu_set(i, cpu_possible_map);
844 }
845
846 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
847 {
848 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
849 union acpi_object *obj;
850 struct acpi_madt_local_sapic *lsapic;
851 cpumask_t tmp_map;
852 long physid;
853 int cpu;
854
855 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
856 return -EINVAL;
857
858 if (!buffer.length || !buffer.pointer)
859 return -EINVAL;
860
861 obj = buffer.pointer;
862 if (obj->type != ACPI_TYPE_BUFFER)
863 {
864 kfree(buffer.pointer);
865 return -EINVAL;
866 }
867
868 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
869
870 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
871 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
872 kfree(buffer.pointer);
873 return -EINVAL;
874 }
875
876 physid = ((lsapic->id << 8) | (lsapic->eid));
877
878 kfree(buffer.pointer);
879 buffer.length = ACPI_ALLOCATE_BUFFER;
880 buffer.pointer = NULL;
881
882 cpus_complement(tmp_map, cpu_present_map);
883 cpu = first_cpu(tmp_map);
884 if (cpu >= NR_CPUS)
885 return -EINVAL;
886
887 acpi_map_cpu2node(handle, cpu, physid);
888
889 cpu_set(cpu, cpu_present_map);
890 ia64_cpu_to_sapicid[cpu] = physid;
891
892 *pcpu = cpu;
893 return (0);
894 }
895
896 EXPORT_SYMBOL(acpi_map_lsapic);
897
898 int acpi_unmap_lsapic(int cpu)
899 {
900 ia64_cpu_to_sapicid[cpu] = -1;
901 cpu_clear(cpu, cpu_present_map);
902
903 #ifdef CONFIG_ACPI_NUMA
904 /* NUMA specific cleanup's */
905 #endif
906
907 return (0);
908 }
909
910 EXPORT_SYMBOL(acpi_unmap_lsapic);
911 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
912
913 #ifdef CONFIG_ACPI_NUMA
914 static acpi_status __devinit
915 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
916 {
917 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
918 union acpi_object *obj;
919 struct acpi_madt_io_sapic *iosapic;
920 unsigned int gsi_base;
921 int pxm, node;
922
923 /* Only care about objects w/ a method that returns the MADT */
924 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
925 return AE_OK;
926
927 if (!buffer.length || !buffer.pointer)
928 return AE_OK;
929
930 obj = buffer.pointer;
931 if (obj->type != ACPI_TYPE_BUFFER ||
932 obj->buffer.length < sizeof(*iosapic)) {
933 kfree(buffer.pointer);
934 return AE_OK;
935 }
936
937 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
938
939 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
940 kfree(buffer.pointer);
941 return AE_OK;
942 }
943
944 gsi_base = iosapic->global_irq_base;
945
946 kfree(buffer.pointer);
947
948 /*
949 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
950 * us which node to associate this with.
951 */
952 pxm = acpi_get_pxm(handle);
953 if (pxm < 0)
954 return AE_OK;
955
956 node = pxm_to_node(pxm);
957
958 if (node >= MAX_NUMNODES || !node_online(node) ||
959 cpus_empty(node_to_cpumask(node)))
960 return AE_OK;
961
962 /* We know a gsi to node mapping! */
963 map_iosapic_to_node(gsi_base, node);
964 return AE_OK;
965 }
966
967 static int __init
968 acpi_map_iosapics (void)
969 {
970 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
971 return 0;
972 }
973
974 fs_initcall(acpi_map_iosapics);
975 #endif /* CONFIG_ACPI_NUMA */
976
977 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
978 {
979 int err;
980
981 if ((err = iosapic_init(phys_addr, gsi_base)))
982 return err;
983
984 #ifdef CONFIG_ACPI_NUMA
985 acpi_map_iosapic(handle, 0, NULL, NULL);
986 #endif /* CONFIG_ACPI_NUMA */
987
988 return 0;
989 }
990
991 EXPORT_SYMBOL(acpi_register_ioapic);
992
993 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
994 {
995 return iosapic_remove(gsi_base);
996 }
997
998 EXPORT_SYMBOL(acpi_unregister_ioapic);
999
1000 /*
1001 * acpi_save_state_mem() - save kernel state
1002 *
1003 * TBD when when IA64 starts to support suspend...
1004 */
1005 int acpi_save_state_mem(void) { return 0; }
1006
1007 /*
1008 * acpi_restore_state()
1009 */
1010 void acpi_restore_state_mem(void) {}
1011
1012 /*
1013 * do_suspend_lowlevel()
1014 */
1015 void do_suspend_lowlevel(void) {}
1016
1017 #endif /* CONFIG_ACPI */
Linux kernel - Deliverables
This page took 0.176206 seconds and 5 git commands to generate.