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