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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * acpi.c - Architecture-Specific Low-Level ACPI Support
4 *
5 * Copyright (C) 1999 VA Linux Systems
6 * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
7 * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
8 * David Mosberger-Tang <davidm@hpl.hp.com>
9 * Copyright (C) 2000 Intel Corp.
10 * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
11 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
12 * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
13 * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
14 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
15 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
16 */
17
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/sched.h>
22#include <linux/smp.h>
23#include <linux/string.h>
24#include <linux/types.h>
25#include <linux/irq.h>
26#include <linux/acpi.h>
27#include <linux/efi.h>
28#include <linux/mmzone.h>
29#include <linux/nodemask.h>
30#include <linux/slab.h>
31#include <acpi/processor.h>
32#include <asm/io.h>
33#include <asm/iosapic.h>
34#include <asm/page.h>
35#include <asm/numa.h>
36#include <asm/sal.h>
37#include <asm/cyclone.h>
38
39#define PREFIX "ACPI: "
40
41int acpi_lapic;
42unsigned int acpi_cpei_override;
43unsigned int acpi_cpei_phys_cpuid;
44
45unsigned long acpi_wakeup_address = 0;
46
47#define ACPI_MAX_PLATFORM_INTERRUPTS 256
48
49/* Array to record platform interrupt vectors for generic interrupt routing. */
50int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
51 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
52};
53
54enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
55
56/*
57 * Interrupt routing API for device drivers. Provides interrupt vector for
58 * a generic platform event. Currently only CPEI is implemented.
59 */
60int acpi_request_vector(u32 int_type)
61{
62 int vector = -1;
63
64 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
65 /* corrected platform error interrupt */
66 vector = platform_intr_list[int_type];
67 } else
68 printk(KERN_ERR
69 "acpi_request_vector(): invalid interrupt type\n");
70 return vector;
71}
72
73void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
74{
75 return __va(phys);
76}
77
78void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
79{
80}
81
82/* --------------------------------------------------------------------------
83 Boot-time Table Parsing
84 -------------------------------------------------------------------------- */
85
86static int available_cpus __initdata;
87struct acpi_table_madt *acpi_madt __initdata;
88static u8 has_8259;
89
90static int __init
91acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
92 const unsigned long end)
93{
94 struct acpi_madt_local_apic_override *lapic;
95
96 lapic = (struct acpi_madt_local_apic_override *)header;
97
98 if (BAD_MADT_ENTRY(lapic, end))
99 return -EINVAL;
100
101 if (lapic->address) {
102 iounmap(ipi_base_addr);
103 ipi_base_addr = ioremap(lapic->address, 0);
104 }
105 return 0;
106}
107
108static int __init
109acpi_parse_lsapic(union acpi_subtable_headers *header, const unsigned long end)
110{
111 struct acpi_madt_local_sapic *lsapic;
112
113 lsapic = (struct acpi_madt_local_sapic *)header;
114
115 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
116
117 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
118#ifdef CONFIG_SMP
119 smp_boot_data.cpu_phys_id[available_cpus] =
120 (lsapic->id << 8) | lsapic->eid;
121#endif
122 ++available_cpus;
123 }
124
125 total_cpus++;
126 return 0;
127}
128
129static int __init
130acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
131{
132 struct acpi_madt_local_apic_nmi *lacpi_nmi;
133
134 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
135
136 if (BAD_MADT_ENTRY(lacpi_nmi, end))
137 return -EINVAL;
138
139 /* TBD: Support lapic_nmi entries */
140 return 0;
141}
142
143static int __init
144acpi_parse_iosapic(union acpi_subtable_headers * header, const unsigned long end)
145{
146 struct acpi_madt_io_sapic *iosapic;
147
148 iosapic = (struct acpi_madt_io_sapic *)header;
149
150 if (BAD_MADT_ENTRY(iosapic, end))
151 return -EINVAL;
152
153 return iosapic_init(iosapic->address, iosapic->global_irq_base);
154}
155
156static unsigned int __initdata acpi_madt_rev;
157
158static int __init
159acpi_parse_plat_int_src(union acpi_subtable_headers * header,
160 const unsigned long end)
161{
162 struct acpi_madt_interrupt_source *plintsrc;
163 int vector;
164
165 plintsrc = (struct acpi_madt_interrupt_source *)header;
166
167 if (BAD_MADT_ENTRY(plintsrc, end))
168 return -EINVAL;
169
170 /*
171 * Get vector assignment for this interrupt, set attributes,
172 * and program the IOSAPIC routing table.
173 */
174 vector = iosapic_register_platform_intr(plintsrc->type,
175 plintsrc->global_irq,
176 plintsrc->io_sapic_vector,
177 plintsrc->eid,
178 plintsrc->id,
179 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
180 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
181 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
182 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
183 ACPI_MADT_TRIGGER_EDGE) ?
184 IOSAPIC_EDGE : IOSAPIC_LEVEL);
185
186 platform_intr_list[plintsrc->type] = vector;
187 if (acpi_madt_rev > 1) {
188 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
189 }
190
191 /*
192 * Save the physical id, so we can check when its being removed
193 */
194 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
195
196 return 0;
197}
198
199#ifdef CONFIG_HOTPLUG_CPU
200unsigned int can_cpei_retarget(void)
201{
202 extern int cpe_vector;
203 extern unsigned int force_cpei_retarget;
204
205 /*
206 * Only if CPEI is supported and the override flag
207 * is present, otherwise return that its re-targettable
208 * if we are in polling mode.
209 */
210 if (cpe_vector > 0) {
211 if (acpi_cpei_override || force_cpei_retarget)
212 return 1;
213 else
214 return 0;
215 }
216 return 1;
217}
218
219unsigned int is_cpu_cpei_target(unsigned int cpu)
220{
221 unsigned int logical_id;
222
223 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
224
225 if (logical_id == cpu)
226 return 1;
227 else
228 return 0;
229}
230
231void set_cpei_target_cpu(unsigned int cpu)
232{
233 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
234}
235#endif
236
237unsigned int get_cpei_target_cpu(void)
238{
239 return acpi_cpei_phys_cpuid;
240}
241
242static int __init
243acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
244 const unsigned long end)
245{
246 struct acpi_madt_interrupt_override *p;
247
248 p = (struct acpi_madt_interrupt_override *)header;
249
250 if (BAD_MADT_ENTRY(p, end))
251 return -EINVAL;
252
253 iosapic_override_isa_irq(p->source_irq, p->global_irq,
254 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
255 ACPI_MADT_POLARITY_ACTIVE_LOW) ?
256 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
257 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
258 ACPI_MADT_TRIGGER_LEVEL) ?
259 IOSAPIC_LEVEL : IOSAPIC_EDGE);
260 return 0;
261}
262
263static int __init
264acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
265{
266 struct acpi_madt_nmi_source *nmi_src;
267
268 nmi_src = (struct acpi_madt_nmi_source *)header;
269
270 if (BAD_MADT_ENTRY(nmi_src, end))
271 return -EINVAL;
272
273 /* TBD: Support nimsrc entries */
274 return 0;
275}
276
277static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
278{
279 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
280
281 /*
282 * Unfortunately ITC_DRIFT is not yet part of the
283 * official SAL spec, so the ITC_DRIFT bit is not
284 * set by the BIOS on this hardware.
285 */
286 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
287
288 cyclone_setup();
289 }
290}
291
292static int __init acpi_parse_madt(struct acpi_table_header *table)
293{
294 acpi_madt = (struct acpi_table_madt *)table;
295
296 acpi_madt_rev = acpi_madt->header.revision;
297
298 /* remember the value for reference after free_initmem() */
299#ifdef CONFIG_ITANIUM
300 has_8259 = 1; /* Firmware on old Itanium systems is broken */
301#else
302 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
303#endif
304 iosapic_system_init(has_8259);
305
306 /* Get base address of IPI Message Block */
307
308 if (acpi_madt->address)
309 ipi_base_addr = ioremap(acpi_madt->address, 0);
310
311 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
312
313 acpi_madt_oem_check(acpi_madt->header.oem_id,
314 acpi_madt->header.oem_table_id);
315
316 return 0;
317}
318
319#ifdef CONFIG_ACPI_NUMA
320
321#undef SLIT_DEBUG
322
323#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
324
325static int __initdata srat_num_cpus; /* number of cpus */
326static u32 pxm_flag[PXM_FLAG_LEN];
327#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
328#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
329static struct acpi_table_slit __initdata *slit_table;
330cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
331
332static int __init
333get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
334{
335 int pxm;
336
337 pxm = pa->proximity_domain_lo;
338 if (acpi_srat_revision >= 2)
339 pxm += pa->proximity_domain_hi[0] << 8;
340 return pxm;
341}
342
343static int __init
344get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
345{
346 int pxm;
347
348 pxm = ma->proximity_domain;
349 if (acpi_srat_revision <= 1)
350 pxm &= 0xff;
351
352 return pxm;
353}
354
355/*
356 * ACPI 2.0 SLIT (System Locality Information Table)
357 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
358 */
359void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
360{
361 u32 len;
362
363 len = sizeof(struct acpi_table_header) + 8
364 + slit->locality_count * slit->locality_count;
365 if (slit->header.length != len) {
366 printk(KERN_ERR
367 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
368 len, slit->header.length);
369 return;
370 }
371 slit_table = slit;
372}
373
374void __init
375acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
376{
377 int pxm;
378
379 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
380 return;
381
382 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
383 printk_once(KERN_WARNING
384 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
385 ARRAY_SIZE(node_cpuid));
386 return;
387 }
388 pxm = get_processor_proximity_domain(pa);
389
390 /* record this node in proximity bitmap */
391 pxm_bit_set(pxm);
392
393 node_cpuid[srat_num_cpus].phys_id =
394 (pa->apic_id << 8) | (pa->local_sapic_eid);
395 /* nid should be overridden as logical node id later */
396 node_cpuid[srat_num_cpus].nid = pxm;
397 cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map);
398 srat_num_cpus++;
399}
400
401int __init
402acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
403{
404 unsigned long paddr, size;
405 int pxm;
406 struct node_memblk_s *p, *q, *pend;
407
408 pxm = get_memory_proximity_domain(ma);
409
410 /* fill node memory chunk structure */
411 paddr = ma->base_address;
412 size = ma->length;
413
414 /* Ignore disabled entries */
415 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
416 return -1;
417
418 if (num_node_memblks >= NR_NODE_MEMBLKS) {
419 pr_err("NUMA: too many memblk ranges\n");
420 return -EINVAL;
421 }
422
423 /* record this node in proximity bitmap */
424 pxm_bit_set(pxm);
425
426 /* Insertion sort based on base address */
427 pend = &node_memblk[num_node_memblks];
428 for (p = &node_memblk[0]; p < pend; p++) {
429 if (paddr < p->start_paddr)
430 break;
431 }
432 if (p < pend) {
433 for (q = pend - 1; q >= p; q--)
434 *(q + 1) = *q;
435 }
436 p->start_paddr = paddr;
437 p->size = size;
438 p->nid = pxm;
439 num_node_memblks++;
440 return 0;
441}
442
443void __init acpi_numa_fixup(void)
444{
445 int i, j, node_from, node_to;
446
447 /* If there's no SRAT, fix the phys_id and mark node 0 online */
448 if (srat_num_cpus == 0) {
449 node_set_online(0);
450 node_cpuid[0].phys_id = hard_smp_processor_id();
451 return;
452 }
453
454 /*
455 * MCD - This can probably be dropped now. No need for pxm ID to node ID
456 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
457 */
458 nodes_clear(node_online_map);
459 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
460 if (pxm_bit_test(i)) {
461 int nid = acpi_map_pxm_to_node(i);
462 node_set_online(nid);
463 }
464 }
465
466 /* set logical node id in memory chunk structure */
467 for (i = 0; i < num_node_memblks; i++)
468 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
469
470 /* assign memory bank numbers for each chunk on each node */
471 for_each_online_node(i) {
472 int bank;
473
474 bank = 0;
475 for (j = 0; j < num_node_memblks; j++)
476 if (node_memblk[j].nid == i)
477 node_memblk[j].bank = bank++;
478 }
479
480 /* set logical node id in cpu structure */
481 for_each_possible_early_cpu(i)
482 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
483
484 printk(KERN_INFO "Number of logical nodes in system = %d\n",
485 num_online_nodes());
486 printk(KERN_INFO "Number of memory chunks in system = %d\n",
487 num_node_memblks);
488
489 if (!slit_table) {
490 for (i = 0; i < MAX_NUMNODES; i++)
491 for (j = 0; j < MAX_NUMNODES; j++)
492 slit_distance(i, j) = i == j ?
493 LOCAL_DISTANCE : REMOTE_DISTANCE;
494 return;
495 }
496
497 memset(numa_slit, -1, sizeof(numa_slit));
498 for (i = 0; i < slit_table->locality_count; i++) {
499 if (!pxm_bit_test(i))
500 continue;
501 node_from = pxm_to_node(i);
502 for (j = 0; j < slit_table->locality_count; j++) {
503 if (!pxm_bit_test(j))
504 continue;
505 node_to = pxm_to_node(j);
506 slit_distance(node_from, node_to) =
507 slit_table->entry[i * slit_table->locality_count + j];
508 }
509 }
510
511#ifdef SLIT_DEBUG
512 printk("ACPI 2.0 SLIT locality table:\n");
513 for_each_online_node(i) {
514 for_each_online_node(j)
515 printk("%03d ", node_distance(i, j));
516 printk("\n");
517 }
518#endif
519}
520#endif /* CONFIG_ACPI_NUMA */
521
522/*
523 * success: return IRQ number (>=0)
524 * failure: return < 0
525 */
526int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
527{
528 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
529 return gsi;
530
531 if (has_8259 && gsi < 16)
532 return isa_irq_to_vector(gsi);
533
534 return iosapic_register_intr(gsi,
535 (polarity ==
536 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
537 IOSAPIC_POL_LOW,
538 (triggering ==
539 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
540 IOSAPIC_LEVEL);
541}
542EXPORT_SYMBOL_GPL(acpi_register_gsi);
543
544void acpi_unregister_gsi(u32 gsi)
545{
546 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
547 return;
548
549 if (has_8259 && gsi < 16)
550 return;
551
552 iosapic_unregister_intr(gsi);
553}
554EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
555
556static int __init acpi_parse_fadt(struct acpi_table_header *table)
557{
558 struct acpi_table_header *fadt_header;
559 struct acpi_table_fadt *fadt;
560
561 fadt_header = (struct acpi_table_header *)table;
562 if (fadt_header->revision != 3)
563 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
564
565 fadt = (struct acpi_table_fadt *)fadt_header;
566
567 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
568 ACPI_ACTIVE_LOW);
569 return 0;
570}
571
572int __init early_acpi_boot_init(void)
573{
574 int ret;
575
576 /*
577 * do a partial walk of MADT to determine how many CPUs
578 * we have including offline CPUs
579 */
580 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
581 printk(KERN_ERR PREFIX "Can't find MADT\n");
582 return 0;
583 }
584
585 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
586 acpi_parse_lsapic, NR_CPUS);
587 if (ret < 1)
588 printk(KERN_ERR PREFIX
589 "Error parsing MADT - no LAPIC entries\n");
590 else
591 acpi_lapic = 1;
592
593#ifdef CONFIG_SMP
594 if (available_cpus == 0) {
595 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
596 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
597 smp_boot_data.cpu_phys_id[available_cpus] =
598 hard_smp_processor_id();
599 available_cpus = 1; /* We've got at least one of these, no? */
600 }
601 smp_boot_data.cpu_count = available_cpus;
602#endif
603 /* Make boot-up look pretty */
604 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
605 total_cpus);
606
607 return 0;
608}
609
610int __init acpi_boot_init(void)
611{
612
613 /*
614 * MADT
615 * ----
616 * Parse the Multiple APIC Description Table (MADT), if exists.
617 * Note that this table provides platform SMP configuration
618 * information -- the successor to MPS tables.
619 */
620
621 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
622 printk(KERN_ERR PREFIX "Can't find MADT\n");
623 goto skip_madt;
624 }
625
626 /* Local APIC */
627
628 if (acpi_table_parse_madt
629 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
630 printk(KERN_ERR PREFIX
631 "Error parsing LAPIC address override entry\n");
632
633 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
634 < 0)
635 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
636
637 /* I/O APIC */
638
639 if (acpi_table_parse_madt
640 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
641 printk(KERN_ERR PREFIX
642 "Error parsing MADT - no IOSAPIC entries\n");
643 }
644
645 /* System-Level Interrupt Routing */
646
647 if (acpi_table_parse_madt
648 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
649 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
650 printk(KERN_ERR PREFIX
651 "Error parsing platform interrupt source entry\n");
652
653 if (acpi_table_parse_madt
654 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
655 printk(KERN_ERR PREFIX
656 "Error parsing interrupt source overrides entry\n");
657
658 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
659 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
660 skip_madt:
661
662 /*
663 * FADT says whether a legacy keyboard controller is present.
664 * The FADT also contains an SCI_INT line, by which the system
665 * gets interrupts such as power and sleep buttons. If it's not
666 * on a Legacy interrupt, it needs to be setup.
667 */
668 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
669 printk(KERN_ERR PREFIX "Can't find FADT\n");
670
671#ifdef CONFIG_ACPI_NUMA
672#ifdef CONFIG_SMP
673 if (srat_num_cpus == 0) {
674 int cpu, i = 1;
675 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
676 if (smp_boot_data.cpu_phys_id[cpu] !=
677 hard_smp_processor_id())
678 node_cpuid[i++].phys_id =
679 smp_boot_data.cpu_phys_id[cpu];
680 }
681#endif
682 build_cpu_to_node_map();
683#endif
684 return 0;
685}
686
687int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
688{
689 int tmp;
690
691 if (has_8259 && gsi < 16)
692 *irq = isa_irq_to_vector(gsi);
693 else {
694 tmp = gsi_to_irq(gsi);
695 if (tmp == -1)
696 return -1;
697 *irq = tmp;
698 }
699 return 0;
700}
701
702int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
703{
704 if (isa_irq >= 16)
705 return -1;
706 *gsi = isa_irq;
707 return 0;
708}
709
710/*
711 * ACPI based hotplug CPU support
712 */
713#ifdef CONFIG_ACPI_HOTPLUG_CPU
714int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
715{
716#ifdef CONFIG_ACPI_NUMA
717 /*
718 * We don't have cpu-only-node hotadd. But if the system equips
719 * SRAT table, pxm is already found and node is ready.
720 * So, just pxm_to_nid(pxm) is OK.
721 * This code here is for the system which doesn't have full SRAT
722 * table for possible cpus.
723 */
724 node_cpuid[cpu].phys_id = physid;
725 node_cpuid[cpu].nid = acpi_get_node(handle);
726#endif
727 return 0;
728}
729
730int additional_cpus __initdata = -1;
731
732static __init int setup_additional_cpus(char *s)
733{
734 if (s)
735 additional_cpus = simple_strtol(s, NULL, 0);
736
737 return 0;
738}
739
740early_param("additional_cpus", setup_additional_cpus);
741
742/*
743 * cpu_possible_mask should be static, it cannot change as CPUs
744 * are onlined, or offlined. The reason is per-cpu data-structures
745 * are allocated by some modules at init time, and dont expect to
746 * do this dynamically on cpu arrival/departure.
747 * cpu_present_mask on the other hand can change dynamically.
748 * In case when cpu_hotplug is not compiled, then we resort to current
749 * behaviour, which is cpu_possible == cpu_present.
750 * - Ashok Raj
751 *
752 * Three ways to find out the number of additional hotplug CPUs:
753 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
754 * - The user can overwrite it with additional_cpus=NUM
755 * - Otherwise don't reserve additional CPUs.
756 */
757__init void prefill_possible_map(void)
758{
759 int i;
760 int possible, disabled_cpus;
761
762 disabled_cpus = total_cpus - available_cpus;
763
764 if (additional_cpus == -1) {
765 if (disabled_cpus > 0)
766 additional_cpus = disabled_cpus;
767 else
768 additional_cpus = 0;
769 }
770
771 possible = available_cpus + additional_cpus;
772
773 if (possible > nr_cpu_ids)
774 possible = nr_cpu_ids;
775
776 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
777 possible, max((possible - available_cpus), 0));
778
779 for (i = 0; i < possible; i++)
780 set_cpu_possible(i, true);
781}
782
783static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
784{
785 cpumask_t tmp_map;
786 int cpu;
787
788 cpumask_complement(&tmp_map, cpu_present_mask);
789 cpu = cpumask_first(&tmp_map);
790 if (cpu >= nr_cpu_ids)
791 return -EINVAL;
792
793 acpi_map_cpu2node(handle, cpu, physid);
794
795 set_cpu_present(cpu, true);
796 ia64_cpu_to_sapicid[cpu] = physid;
797
798 acpi_processor_set_pdc(handle);
799
800 *pcpu = cpu;
801 return (0);
802}
803
804/* wrapper to silence section mismatch warning */
805int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
806 int *pcpu)
807{
808 return _acpi_map_lsapic(handle, physid, pcpu);
809}
810EXPORT_SYMBOL(acpi_map_cpu);
811
812int acpi_unmap_cpu(int cpu)
813{
814 ia64_cpu_to_sapicid[cpu] = -1;
815 set_cpu_present(cpu, false);
816
817#ifdef CONFIG_ACPI_NUMA
818 /* NUMA specific cleanup's */
819#endif
820
821 return (0);
822}
823EXPORT_SYMBOL(acpi_unmap_cpu);
824#endif /* CONFIG_ACPI_HOTPLUG_CPU */
825
826#ifdef CONFIG_ACPI_NUMA
827static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
828 void *context, void **ret)
829{
830 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
831 union acpi_object *obj;
832 struct acpi_madt_io_sapic *iosapic;
833 unsigned int gsi_base;
834 int node;
835
836 /* Only care about objects w/ a method that returns the MADT */
837 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
838 return AE_OK;
839
840 if (!buffer.length || !buffer.pointer)
841 return AE_OK;
842
843 obj = buffer.pointer;
844 if (obj->type != ACPI_TYPE_BUFFER ||
845 obj->buffer.length < sizeof(*iosapic)) {
846 kfree(buffer.pointer);
847 return AE_OK;
848 }
849
850 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
851
852 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
853 kfree(buffer.pointer);
854 return AE_OK;
855 }
856
857 gsi_base = iosapic->global_irq_base;
858
859 kfree(buffer.pointer);
860
861 /* OK, it's an IOSAPIC MADT entry; associate it with a node */
862 node = acpi_get_node(handle);
863 if (node == NUMA_NO_NODE || !node_online(node) ||
864 cpumask_empty(cpumask_of_node(node)))
865 return AE_OK;
866
867 /* We know a gsi to node mapping! */
868 map_iosapic_to_node(gsi_base, node);
869 return AE_OK;
870}
871
872static int __init
873acpi_map_iosapics (void)
874{
875 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
876 return 0;
877}
878
879fs_initcall(acpi_map_iosapics);
880#endif /* CONFIG_ACPI_NUMA */
881
882int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
883{
884 int err;
885
886 if ((err = iosapic_init(phys_addr, gsi_base)))
887 return err;
888
889#ifdef CONFIG_ACPI_NUMA
890 acpi_map_iosapic(handle, 0, NULL, NULL);
891#endif /* CONFIG_ACPI_NUMA */
892
893 return 0;
894}
895
896EXPORT_SYMBOL(acpi_register_ioapic);
897
898int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
899{
900 return iosapic_remove(gsi_base);
901}
902
903EXPORT_SYMBOL(acpi_unregister_ioapic);
904
905/*
906 * acpi_suspend_lowlevel() - save kernel state and suspend.
907 *
908 * TBD when when IA64 starts to support suspend...
909 */
910int acpi_suspend_lowlevel(void) { return 0; }
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
59unsigned int acpi_cpei_override;
60unsigned int acpi_cpei_phys_cpuid;
61
62unsigned long acpi_wakeup_address = 0;
63
64#ifdef CONFIG_IA64_GENERIC
65static unsigned long __init acpi_find_rsdp(void)
66{
67 unsigned long rsdp_phys = 0;
68
69 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
70 rsdp_phys = efi.acpi20;
71 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
72 printk(KERN_WARNING PREFIX
73 "v1.0/r0.71 tables no longer supported\n");
74 return rsdp_phys;
75}
76
77const char __init *
78acpi_get_sysname(void)
79{
80 unsigned long rsdp_phys;
81 struct acpi_table_rsdp *rsdp;
82 struct acpi_table_xsdt *xsdt;
83 struct acpi_table_header *hdr;
84#ifdef CONFIG_INTEL_IOMMU
85 u64 i, nentries;
86#endif
87
88 rsdp_phys = acpi_find_rsdp();
89 if (!rsdp_phys) {
90 printk(KERN_ERR
91 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
92 return "dig";
93 }
94
95 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
96 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
97 printk(KERN_ERR
98 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
99 return "dig";
100 }
101
102 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
103 hdr = &xsdt->header;
104 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
105 printk(KERN_ERR
106 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
107 return "dig";
108 }
109
110 if (!strcmp(hdr->oem_id, "HP")) {
111 return "hpzx1";
112 } else if (!strcmp(hdr->oem_id, "SGI")) {
113 if (!strcmp(hdr->oem_table_id + 4, "UV"))
114 return "uv";
115 else
116 return "sn2";
117 }
118
119#ifdef CONFIG_INTEL_IOMMU
120 /* Look for Intel IOMMU */
121 nentries = (hdr->length - sizeof(*hdr)) /
122 sizeof(xsdt->table_offset_entry[0]);
123 for (i = 0; i < nentries; i++) {
124 hdr = __va(xsdt->table_offset_entry[i]);
125 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
126 sizeof(ACPI_SIG_DMAR) - 1) == 0)
127 return "dig_vtd";
128 }
129#endif
130
131 return "dig";
132}
133#endif /* CONFIG_IA64_GENERIC */
134
135#define ACPI_MAX_PLATFORM_INTERRUPTS 256
136
137/* Array to record platform interrupt vectors for generic interrupt routing. */
138int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
139 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
140};
141
142enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
143
144/*
145 * Interrupt routing API for device drivers. Provides interrupt vector for
146 * a generic platform event. Currently only CPEI is implemented.
147 */
148int acpi_request_vector(u32 int_type)
149{
150 int vector = -1;
151
152 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
153 /* corrected platform error interrupt */
154 vector = platform_intr_list[int_type];
155 } else
156 printk(KERN_ERR
157 "acpi_request_vector(): invalid interrupt type\n");
158 return vector;
159}
160
161char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
162{
163 return __va(phys_addr);
164}
165
166void __init __acpi_unmap_table(char *map, unsigned long size)
167{
168}
169
170/* --------------------------------------------------------------------------
171 Boot-time Table Parsing
172 -------------------------------------------------------------------------- */
173
174static int available_cpus __initdata;
175struct acpi_table_madt *acpi_madt __initdata;
176static u8 has_8259;
177
178static int __init
179acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
180 const unsigned long end)
181{
182 struct acpi_madt_local_apic_override *lapic;
183
184 lapic = (struct acpi_madt_local_apic_override *)header;
185
186 if (BAD_MADT_ENTRY(lapic, end))
187 return -EINVAL;
188
189 if (lapic->address) {
190 iounmap(ipi_base_addr);
191 ipi_base_addr = ioremap(lapic->address, 0);
192 }
193 return 0;
194}
195
196static int __init
197acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
198{
199 struct acpi_madt_local_sapic *lsapic;
200
201 lsapic = (struct acpi_madt_local_sapic *)header;
202
203 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
204
205 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
206#ifdef CONFIG_SMP
207 smp_boot_data.cpu_phys_id[available_cpus] =
208 (lsapic->id << 8) | lsapic->eid;
209#endif
210 ++available_cpus;
211 }
212
213 total_cpus++;
214 return 0;
215}
216
217static int __init
218acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
219{
220 struct acpi_madt_local_apic_nmi *lacpi_nmi;
221
222 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
223
224 if (BAD_MADT_ENTRY(lacpi_nmi, end))
225 return -EINVAL;
226
227 /* TBD: Support lapic_nmi entries */
228 return 0;
229}
230
231static int __init
232acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
233{
234 struct acpi_madt_io_sapic *iosapic;
235
236 iosapic = (struct acpi_madt_io_sapic *)header;
237
238 if (BAD_MADT_ENTRY(iosapic, end))
239 return -EINVAL;
240
241 return iosapic_init(iosapic->address, iosapic->global_irq_base);
242}
243
244static unsigned int __initdata acpi_madt_rev;
245
246static int __init
247acpi_parse_plat_int_src(struct acpi_subtable_header * header,
248 const unsigned long end)
249{
250 struct acpi_madt_interrupt_source *plintsrc;
251 int vector;
252
253 plintsrc = (struct acpi_madt_interrupt_source *)header;
254
255 if (BAD_MADT_ENTRY(plintsrc, end))
256 return -EINVAL;
257
258 /*
259 * Get vector assignment for this interrupt, set attributes,
260 * and program the IOSAPIC routing table.
261 */
262 vector = iosapic_register_platform_intr(plintsrc->type,
263 plintsrc->global_irq,
264 plintsrc->io_sapic_vector,
265 plintsrc->eid,
266 plintsrc->id,
267 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
268 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
269 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
270 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
271 ACPI_MADT_TRIGGER_EDGE) ?
272 IOSAPIC_EDGE : IOSAPIC_LEVEL);
273
274 platform_intr_list[plintsrc->type] = vector;
275 if (acpi_madt_rev > 1) {
276 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
277 }
278
279 /*
280 * Save the physical id, so we can check when its being removed
281 */
282 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
283
284 return 0;
285}
286
287#ifdef CONFIG_HOTPLUG_CPU
288unsigned int can_cpei_retarget(void)
289{
290 extern int cpe_vector;
291 extern unsigned int force_cpei_retarget;
292
293 /*
294 * Only if CPEI is supported and the override flag
295 * is present, otherwise return that its re-targettable
296 * if we are in polling mode.
297 */
298 if (cpe_vector > 0) {
299 if (acpi_cpei_override || force_cpei_retarget)
300 return 1;
301 else
302 return 0;
303 }
304 return 1;
305}
306
307unsigned int is_cpu_cpei_target(unsigned int cpu)
308{
309 unsigned int logical_id;
310
311 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
312
313 if (logical_id == cpu)
314 return 1;
315 else
316 return 0;
317}
318
319void set_cpei_target_cpu(unsigned int cpu)
320{
321 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
322}
323#endif
324
325unsigned int get_cpei_target_cpu(void)
326{
327 return acpi_cpei_phys_cpuid;
328}
329
330static int __init
331acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
332 const unsigned long end)
333{
334 struct acpi_madt_interrupt_override *p;
335
336 p = (struct acpi_madt_interrupt_override *)header;
337
338 if (BAD_MADT_ENTRY(p, end))
339 return -EINVAL;
340
341 iosapic_override_isa_irq(p->source_irq, p->global_irq,
342 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
343 ACPI_MADT_POLARITY_ACTIVE_LOW) ?
344 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
345 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
346 ACPI_MADT_TRIGGER_LEVEL) ?
347 IOSAPIC_LEVEL : IOSAPIC_EDGE);
348 return 0;
349}
350
351static int __init
352acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
353{
354 struct acpi_madt_nmi_source *nmi_src;
355
356 nmi_src = (struct acpi_madt_nmi_source *)header;
357
358 if (BAD_MADT_ENTRY(nmi_src, end))
359 return -EINVAL;
360
361 /* TBD: Support nimsrc entries */
362 return 0;
363}
364
365static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
366{
367 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
368
369 /*
370 * Unfortunately ITC_DRIFT is not yet part of the
371 * official SAL spec, so the ITC_DRIFT bit is not
372 * set by the BIOS on this hardware.
373 */
374 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
375
376 cyclone_setup();
377 }
378}
379
380static int __init acpi_parse_madt(struct acpi_table_header *table)
381{
382 if (!table)
383 return -EINVAL;
384
385 acpi_madt = (struct acpi_table_madt *)table;
386
387 acpi_madt_rev = acpi_madt->header.revision;
388
389 /* remember the value for reference after free_initmem() */
390#ifdef CONFIG_ITANIUM
391 has_8259 = 1; /* Firmware on old Itanium systems is broken */
392#else
393 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
394#endif
395 iosapic_system_init(has_8259);
396
397 /* Get base address of IPI Message Block */
398
399 if (acpi_madt->address)
400 ipi_base_addr = ioremap(acpi_madt->address, 0);
401
402 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
403
404 acpi_madt_oem_check(acpi_madt->header.oem_id,
405 acpi_madt->header.oem_table_id);
406
407 return 0;
408}
409
410#ifdef CONFIG_ACPI_NUMA
411
412#undef SLIT_DEBUG
413
414#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
415
416static int __initdata srat_num_cpus; /* number of cpus */
417static u32 pxm_flag[PXM_FLAG_LEN];
418#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
419#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
420static struct acpi_table_slit __initdata *slit_table;
421cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
422
423static int __init
424get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
425{
426 int pxm;
427
428 pxm = pa->proximity_domain_lo;
429 if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
430 pxm += pa->proximity_domain_hi[0] << 8;
431 return pxm;
432}
433
434static int __init
435get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
436{
437 int pxm;
438
439 pxm = ma->proximity_domain;
440 if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
441 pxm &= 0xff;
442
443 return pxm;
444}
445
446/*
447 * ACPI 2.0 SLIT (System Locality Information Table)
448 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
449 */
450void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
451{
452 u32 len;
453
454 len = sizeof(struct acpi_table_header) + 8
455 + slit->locality_count * slit->locality_count;
456 if (slit->header.length != len) {
457 printk(KERN_ERR
458 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
459 len, slit->header.length);
460 return;
461 }
462 slit_table = slit;
463}
464
465void __init
466acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
467{
468 int pxm;
469
470 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
471 return;
472
473 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
474 printk_once(KERN_WARNING
475 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
476 ARRAY_SIZE(node_cpuid));
477 return;
478 }
479 pxm = get_processor_proximity_domain(pa);
480
481 /* record this node in proximity bitmap */
482 pxm_bit_set(pxm);
483
484 node_cpuid[srat_num_cpus].phys_id =
485 (pa->apic_id << 8) | (pa->local_sapic_eid);
486 /* nid should be overridden as logical node id later */
487 node_cpuid[srat_num_cpus].nid = pxm;
488 cpu_set(srat_num_cpus, early_cpu_possible_map);
489 srat_num_cpus++;
490}
491
492int __init
493acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
494{
495 unsigned long paddr, size;
496 int pxm;
497 struct node_memblk_s *p, *q, *pend;
498
499 pxm = get_memory_proximity_domain(ma);
500
501 /* fill node memory chunk structure */
502 paddr = ma->base_address;
503 size = ma->length;
504
505 /* Ignore disabled entries */
506 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
507 return -1;
508
509 /* record this node in proximity bitmap */
510 pxm_bit_set(pxm);
511
512 /* Insertion sort based on base address */
513 pend = &node_memblk[num_node_memblks];
514 for (p = &node_memblk[0]; p < pend; p++) {
515 if (paddr < p->start_paddr)
516 break;
517 }
518 if (p < pend) {
519 for (q = pend - 1; q >= p; q--)
520 *(q + 1) = *q;
521 }
522 p->start_paddr = paddr;
523 p->size = size;
524 p->nid = pxm;
525 num_node_memblks++;
526 return 0;
527}
528
529void __init acpi_numa_arch_fixup(void)
530{
531 int i, j, node_from, node_to;
532
533 /* If there's no SRAT, fix the phys_id and mark node 0 online */
534 if (srat_num_cpus == 0) {
535 node_set_online(0);
536 node_cpuid[0].phys_id = hard_smp_processor_id();
537 return;
538 }
539
540 /*
541 * MCD - This can probably be dropped now. No need for pxm ID to node ID
542 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
543 */
544 nodes_clear(node_online_map);
545 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
546 if (pxm_bit_test(i)) {
547 int nid = acpi_map_pxm_to_node(i);
548 node_set_online(nid);
549 }
550 }
551
552 /* set logical node id in memory chunk structure */
553 for (i = 0; i < num_node_memblks; i++)
554 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
555
556 /* assign memory bank numbers for each chunk on each node */
557 for_each_online_node(i) {
558 int bank;
559
560 bank = 0;
561 for (j = 0; j < num_node_memblks; j++)
562 if (node_memblk[j].nid == i)
563 node_memblk[j].bank = bank++;
564 }
565
566 /* set logical node id in cpu structure */
567 for_each_possible_early_cpu(i)
568 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
569
570 printk(KERN_INFO "Number of logical nodes in system = %d\n",
571 num_online_nodes());
572 printk(KERN_INFO "Number of memory chunks in system = %d\n",
573 num_node_memblks);
574
575 if (!slit_table) {
576 for (i = 0; i < MAX_NUMNODES; i++)
577 for (j = 0; j < MAX_NUMNODES; j++)
578 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
579 REMOTE_DISTANCE;
580 return;
581 }
582
583 memset(numa_slit, -1, sizeof(numa_slit));
584 for (i = 0; i < slit_table->locality_count; i++) {
585 if (!pxm_bit_test(i))
586 continue;
587 node_from = pxm_to_node(i);
588 for (j = 0; j < slit_table->locality_count; j++) {
589 if (!pxm_bit_test(j))
590 continue;
591 node_to = pxm_to_node(j);
592 node_distance(node_from, node_to) =
593 slit_table->entry[i * slit_table->locality_count + j];
594 }
595 }
596
597#ifdef SLIT_DEBUG
598 printk("ACPI 2.0 SLIT locality table:\n");
599 for_each_online_node(i) {
600 for_each_online_node(j)
601 printk("%03d ", node_distance(i, j));
602 printk("\n");
603 }
604#endif
605}
606#endif /* CONFIG_ACPI_NUMA */
607
608/*
609 * success: return IRQ number (>=0)
610 * failure: return < 0
611 */
612int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
613{
614 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
615 return gsi;
616
617 if (has_8259 && gsi < 16)
618 return isa_irq_to_vector(gsi);
619
620 return iosapic_register_intr(gsi,
621 (polarity ==
622 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
623 IOSAPIC_POL_LOW,
624 (triggering ==
625 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
626 IOSAPIC_LEVEL);
627}
628EXPORT_SYMBOL_GPL(acpi_register_gsi);
629
630void acpi_unregister_gsi(u32 gsi)
631{
632 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
633 return;
634
635 if (has_8259 && gsi < 16)
636 return;
637
638 iosapic_unregister_intr(gsi);
639}
640EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
641
642static int __init acpi_parse_fadt(struct acpi_table_header *table)
643{
644 struct acpi_table_header *fadt_header;
645 struct acpi_table_fadt *fadt;
646
647 if (!table)
648 return -EINVAL;
649
650 fadt_header = (struct acpi_table_header *)table;
651 if (fadt_header->revision != 3)
652 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
653
654 fadt = (struct acpi_table_fadt *)fadt_header;
655
656 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
657 ACPI_ACTIVE_LOW);
658 return 0;
659}
660
661int __init early_acpi_boot_init(void)
662{
663 int ret;
664
665 /*
666 * do a partial walk of MADT to determine how many CPUs
667 * we have including offline CPUs
668 */
669 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
670 printk(KERN_ERR PREFIX "Can't find MADT\n");
671 return 0;
672 }
673
674 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
675 acpi_parse_lsapic, NR_CPUS);
676 if (ret < 1)
677 printk(KERN_ERR PREFIX
678 "Error parsing MADT - no LAPIC entries\n");
679
680#ifdef CONFIG_SMP
681 if (available_cpus == 0) {
682 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
683 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
684 smp_boot_data.cpu_phys_id[available_cpus] =
685 hard_smp_processor_id();
686 available_cpus = 1; /* We've got at least one of these, no? */
687 }
688 smp_boot_data.cpu_count = available_cpus;
689#endif
690 /* Make boot-up look pretty */
691 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
692 total_cpus);
693
694 return 0;
695}
696
697int __init acpi_boot_init(void)
698{
699
700 /*
701 * MADT
702 * ----
703 * Parse the Multiple APIC Description Table (MADT), if exists.
704 * Note that this table provides platform SMP configuration
705 * information -- the successor to MPS tables.
706 */
707
708 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
709 printk(KERN_ERR PREFIX "Can't find MADT\n");
710 goto skip_madt;
711 }
712
713 /* Local APIC */
714
715 if (acpi_table_parse_madt
716 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
717 printk(KERN_ERR PREFIX
718 "Error parsing LAPIC address override entry\n");
719
720 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
721 < 0)
722 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
723
724 /* I/O APIC */
725
726 if (acpi_table_parse_madt
727 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
728 if (!ia64_platform_is("sn2"))
729 printk(KERN_ERR PREFIX
730 "Error parsing MADT - no IOSAPIC entries\n");
731 }
732
733 /* System-Level Interrupt Routing */
734
735 if (acpi_table_parse_madt
736 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
737 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
738 printk(KERN_ERR PREFIX
739 "Error parsing platform interrupt source entry\n");
740
741 if (acpi_table_parse_madt
742 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
743 printk(KERN_ERR PREFIX
744 "Error parsing interrupt source overrides entry\n");
745
746 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
747 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
748 skip_madt:
749
750 /*
751 * FADT says whether a legacy keyboard controller is present.
752 * The FADT also contains an SCI_INT line, by which the system
753 * gets interrupts such as power and sleep buttons. If it's not
754 * on a Legacy interrupt, it needs to be setup.
755 */
756 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
757 printk(KERN_ERR PREFIX "Can't find FADT\n");
758
759#ifdef CONFIG_ACPI_NUMA
760#ifdef CONFIG_SMP
761 if (srat_num_cpus == 0) {
762 int cpu, i = 1;
763 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
764 if (smp_boot_data.cpu_phys_id[cpu] !=
765 hard_smp_processor_id())
766 node_cpuid[i++].phys_id =
767 smp_boot_data.cpu_phys_id[cpu];
768 }
769#endif
770 build_cpu_to_node_map();
771#endif
772 return 0;
773}
774
775int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
776{
777 int tmp;
778
779 if (has_8259 && gsi < 16)
780 *irq = isa_irq_to_vector(gsi);
781 else {
782 tmp = gsi_to_irq(gsi);
783 if (tmp == -1)
784 return -1;
785 *irq = tmp;
786 }
787 return 0;
788}
789
790int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
791{
792 if (isa_irq >= 16)
793 return -1;
794 *gsi = isa_irq;
795 return 0;
796}
797
798/*
799 * ACPI based hotplug CPU support
800 */
801#ifdef CONFIG_ACPI_HOTPLUG_CPU
802static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
803{
804#ifdef CONFIG_ACPI_NUMA
805 /*
806 * We don't have cpu-only-node hotadd. But if the system equips
807 * SRAT table, pxm is already found and node is ready.
808 * So, just pxm_to_nid(pxm) is OK.
809 * This code here is for the system which doesn't have full SRAT
810 * table for possible cpus.
811 */
812 node_cpuid[cpu].phys_id = physid;
813 node_cpuid[cpu].nid = acpi_get_node(handle);
814#endif
815 return 0;
816}
817
818int additional_cpus __initdata = -1;
819
820static __init int setup_additional_cpus(char *s)
821{
822 if (s)
823 additional_cpus = simple_strtol(s, NULL, 0);
824
825 return 0;
826}
827
828early_param("additional_cpus", setup_additional_cpus);
829
830/*
831 * cpu_possible_mask should be static, it cannot change as CPUs
832 * are onlined, or offlined. The reason is per-cpu data-structures
833 * are allocated by some modules at init time, and dont expect to
834 * do this dynamically on cpu arrival/departure.
835 * cpu_present_mask on the other hand can change dynamically.
836 * In case when cpu_hotplug is not compiled, then we resort to current
837 * behaviour, which is cpu_possible == cpu_present.
838 * - Ashok Raj
839 *
840 * Three ways to find out the number of additional hotplug CPUs:
841 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
842 * - The user can overwrite it with additional_cpus=NUM
843 * - Otherwise don't reserve additional CPUs.
844 */
845__init void prefill_possible_map(void)
846{
847 int i;
848 int possible, disabled_cpus;
849
850 disabled_cpus = total_cpus - available_cpus;
851
852 if (additional_cpus == -1) {
853 if (disabled_cpus > 0)
854 additional_cpus = disabled_cpus;
855 else
856 additional_cpus = 0;
857 }
858
859 possible = available_cpus + additional_cpus;
860
861 if (possible > nr_cpu_ids)
862 possible = nr_cpu_ids;
863
864 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
865 possible, max((possible - available_cpus), 0));
866
867 for (i = 0; i < possible; i++)
868 set_cpu_possible(i, true);
869}
870
871static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
872{
873 cpumask_t tmp_map;
874 int cpu;
875
876 cpumask_complement(&tmp_map, cpu_present_mask);
877 cpu = cpumask_first(&tmp_map);
878 if (cpu >= nr_cpu_ids)
879 return -EINVAL;
880
881 acpi_map_cpu2node(handle, cpu, physid);
882
883 set_cpu_present(cpu, true);
884 ia64_cpu_to_sapicid[cpu] = physid;
885
886 acpi_processor_set_pdc(handle);
887
888 *pcpu = cpu;
889 return (0);
890}
891
892/* wrapper to silence section mismatch warning */
893int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
894{
895 return _acpi_map_lsapic(handle, physid, pcpu);
896}
897EXPORT_SYMBOL(acpi_map_lsapic);
898
899int acpi_unmap_lsapic(int cpu)
900{
901 ia64_cpu_to_sapicid[cpu] = -1;
902 set_cpu_present(cpu, false);
903
904#ifdef CONFIG_ACPI_NUMA
905 /* NUMA specific cleanup's */
906#endif
907
908 return (0);
909}
910
911EXPORT_SYMBOL(acpi_unmap_lsapic);
912#endif /* CONFIG_ACPI_HOTPLUG_CPU */
913
914#ifdef CONFIG_ACPI_NUMA
915static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
916 void *context, void **ret)
917{
918 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
919 union acpi_object *obj;
920 struct acpi_madt_io_sapic *iosapic;
921 unsigned int gsi_base;
922 int node;
923
924 /* Only care about objects w/ a method that returns the MADT */
925 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
926 return AE_OK;
927
928 if (!buffer.length || !buffer.pointer)
929 return AE_OK;
930
931 obj = buffer.pointer;
932 if (obj->type != ACPI_TYPE_BUFFER ||
933 obj->buffer.length < sizeof(*iosapic)) {
934 kfree(buffer.pointer);
935 return AE_OK;
936 }
937
938 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
939
940 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
941 kfree(buffer.pointer);
942 return AE_OK;
943 }
944
945 gsi_base = iosapic->global_irq_base;
946
947 kfree(buffer.pointer);
948
949 /* OK, it's an IOSAPIC MADT entry; associate it with a node */
950 node = acpi_get_node(handle);
951 if (node == NUMA_NO_NODE || !node_online(node) ||
952 cpumask_empty(cpumask_of_node(node)))
953 return AE_OK;
954
955 /* We know a gsi to node mapping! */
956 map_iosapic_to_node(gsi_base, node);
957 return AE_OK;
958}
959
960static int __init
961acpi_map_iosapics (void)
962{
963 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
964 return 0;
965}
966
967fs_initcall(acpi_map_iosapics);
968#endif /* CONFIG_ACPI_NUMA */
969
970int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
971{
972 int err;
973
974 if ((err = iosapic_init(phys_addr, gsi_base)))
975 return err;
976
977#ifdef CONFIG_ACPI_NUMA
978 acpi_map_iosapic(handle, 0, NULL, NULL);
979#endif /* CONFIG_ACPI_NUMA */
980
981 return 0;
982}
983
984EXPORT_SYMBOL(acpi_register_ioapic);
985
986int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
987{
988 return iosapic_remove(gsi_base);
989}
990
991EXPORT_SYMBOL(acpi_unregister_ioapic);
992
993/*
994 * acpi_suspend_lowlevel() - save kernel state and suspend.
995 *
996 * TBD when when IA64 starts to support suspend...
997 */
998int acpi_suspend_lowlevel(void) { return 0; }