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