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