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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; }
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#include <asm/xen/hypervisor.h>
57
58#define BAD_MADT_ENTRY(entry, end) ( \
59 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
60 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
61
62#define PREFIX "ACPI: "
63
64u32 acpi_rsdt_forced;
65unsigned int acpi_cpei_override;
66unsigned int acpi_cpei_phys_cpuid;
67
68unsigned long acpi_wakeup_address = 0;
69
70#ifdef CONFIG_IA64_GENERIC
71static unsigned long __init acpi_find_rsdp(void)
72{
73 unsigned long rsdp_phys = 0;
74
75 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
76 rsdp_phys = efi.acpi20;
77 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
78 printk(KERN_WARNING PREFIX
79 "v1.0/r0.71 tables no longer supported\n");
80 return rsdp_phys;
81}
82
83const char __init *
84acpi_get_sysname(void)
85{
86 unsigned long rsdp_phys;
87 struct acpi_table_rsdp *rsdp;
88 struct acpi_table_xsdt *xsdt;
89 struct acpi_table_header *hdr;
90#ifdef CONFIG_INTEL_IOMMU
91 u64 i, nentries;
92#endif
93
94 rsdp_phys = acpi_find_rsdp();
95 if (!rsdp_phys) {
96 printk(KERN_ERR
97 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
98 return "dig";
99 }
100
101 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
102 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
103 printk(KERN_ERR
104 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
105 return "dig";
106 }
107
108 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
109 hdr = &xsdt->header;
110 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
111 printk(KERN_ERR
112 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
113 return "dig";
114 }
115
116 if (!strcmp(hdr->oem_id, "HP")) {
117 return "hpzx1";
118 } else if (!strcmp(hdr->oem_id, "SGI")) {
119 if (!strcmp(hdr->oem_table_id + 4, "UV"))
120 return "uv";
121 else
122 return "sn2";
123 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
124 return "xen";
125 }
126
127#ifdef CONFIG_INTEL_IOMMU
128 /* Look for Intel IOMMU */
129 nentries = (hdr->length - sizeof(*hdr)) /
130 sizeof(xsdt->table_offset_entry[0]);
131 for (i = 0; i < nentries; i++) {
132 hdr = __va(xsdt->table_offset_entry[i]);
133 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
134 sizeof(ACPI_SIG_DMAR) - 1) == 0)
135 return "dig_vtd";
136 }
137#endif
138
139 return "dig";
140}
141#endif /* CONFIG_IA64_GENERIC */
142
143#define ACPI_MAX_PLATFORM_INTERRUPTS 256
144
145/* Array to record platform interrupt vectors for generic interrupt routing. */
146int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
147 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
148};
149
150enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
151
152/*
153 * Interrupt routing API for device drivers. Provides interrupt vector for
154 * a generic platform event. Currently only CPEI is implemented.
155 */
156int acpi_request_vector(u32 int_type)
157{
158 int vector = -1;
159
160 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
161 /* corrected platform error interrupt */
162 vector = platform_intr_list[int_type];
163 } else
164 printk(KERN_ERR
165 "acpi_request_vector(): invalid interrupt type\n");
166 return vector;
167}
168
169char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
170{
171 return __va(phys_addr);
172}
173
174void __init __acpi_unmap_table(char *map, unsigned long size)
175{
176}
177
178/* --------------------------------------------------------------------------
179 Boot-time Table Parsing
180 -------------------------------------------------------------------------- */
181
182static int available_cpus __initdata;
183struct acpi_table_madt *acpi_madt __initdata;
184static u8 has_8259;
185
186static int __init
187acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
188 const unsigned long end)
189{
190 struct acpi_madt_local_apic_override *lapic;
191
192 lapic = (struct acpi_madt_local_apic_override *)header;
193
194 if (BAD_MADT_ENTRY(lapic, end))
195 return -EINVAL;
196
197 if (lapic->address) {
198 iounmap(ipi_base_addr);
199 ipi_base_addr = ioremap(lapic->address, 0);
200 }
201 return 0;
202}
203
204static int __init
205acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
206{
207 struct acpi_madt_local_sapic *lsapic;
208
209 lsapic = (struct acpi_madt_local_sapic *)header;
210
211 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
212
213 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
214#ifdef CONFIG_SMP
215 smp_boot_data.cpu_phys_id[available_cpus] =
216 (lsapic->id << 8) | lsapic->eid;
217#endif
218 ++available_cpus;
219 }
220
221 total_cpus++;
222 return 0;
223}
224
225static int __init
226acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
227{
228 struct acpi_madt_local_apic_nmi *lacpi_nmi;
229
230 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
231
232 if (BAD_MADT_ENTRY(lacpi_nmi, end))
233 return -EINVAL;
234
235 /* TBD: Support lapic_nmi entries */
236 return 0;
237}
238
239static int __init
240acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
241{
242 struct acpi_madt_io_sapic *iosapic;
243
244 iosapic = (struct acpi_madt_io_sapic *)header;
245
246 if (BAD_MADT_ENTRY(iosapic, end))
247 return -EINVAL;
248
249 return iosapic_init(iosapic->address, iosapic->global_irq_base);
250}
251
252static unsigned int __initdata acpi_madt_rev;
253
254static int __init
255acpi_parse_plat_int_src(struct acpi_subtable_header * header,
256 const unsigned long end)
257{
258 struct acpi_madt_interrupt_source *plintsrc;
259 int vector;
260
261 plintsrc = (struct acpi_madt_interrupt_source *)header;
262
263 if (BAD_MADT_ENTRY(plintsrc, end))
264 return -EINVAL;
265
266 /*
267 * Get vector assignment for this interrupt, set attributes,
268 * and program the IOSAPIC routing table.
269 */
270 vector = iosapic_register_platform_intr(plintsrc->type,
271 plintsrc->global_irq,
272 plintsrc->io_sapic_vector,
273 plintsrc->eid,
274 plintsrc->id,
275 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
276 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
277 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
278 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
279 ACPI_MADT_TRIGGER_EDGE) ?
280 IOSAPIC_EDGE : IOSAPIC_LEVEL);
281
282 platform_intr_list[plintsrc->type] = vector;
283 if (acpi_madt_rev > 1) {
284 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
285 }
286
287 /*
288 * Save the physical id, so we can check when its being removed
289 */
290 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
291
292 return 0;
293}
294
295#ifdef CONFIG_HOTPLUG_CPU
296unsigned int can_cpei_retarget(void)
297{
298 extern int cpe_vector;
299 extern unsigned int force_cpei_retarget;
300
301 /*
302 * Only if CPEI is supported and the override flag
303 * is present, otherwise return that its re-targettable
304 * if we are in polling mode.
305 */
306 if (cpe_vector > 0) {
307 if (acpi_cpei_override || force_cpei_retarget)
308 return 1;
309 else
310 return 0;
311 }
312 return 1;
313}
314
315unsigned int is_cpu_cpei_target(unsigned int cpu)
316{
317 unsigned int logical_id;
318
319 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
320
321 if (logical_id == cpu)
322 return 1;
323 else
324 return 0;
325}
326
327void set_cpei_target_cpu(unsigned int cpu)
328{
329 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
330}
331#endif
332
333unsigned int get_cpei_target_cpu(void)
334{
335 return acpi_cpei_phys_cpuid;
336}
337
338static int __init
339acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
340 const unsigned long end)
341{
342 struct acpi_madt_interrupt_override *p;
343
344 p = (struct acpi_madt_interrupt_override *)header;
345
346 if (BAD_MADT_ENTRY(p, end))
347 return -EINVAL;
348
349 iosapic_override_isa_irq(p->source_irq, p->global_irq,
350 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
351 ACPI_MADT_POLARITY_ACTIVE_LOW) ?
352 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
353 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
354 ACPI_MADT_TRIGGER_LEVEL) ?
355 IOSAPIC_LEVEL : IOSAPIC_EDGE);
356 return 0;
357}
358
359static int __init
360acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
361{
362 struct acpi_madt_nmi_source *nmi_src;
363
364 nmi_src = (struct acpi_madt_nmi_source *)header;
365
366 if (BAD_MADT_ENTRY(nmi_src, end))
367 return -EINVAL;
368
369 /* TBD: Support nimsrc entries */
370 return 0;
371}
372
373static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
374{
375 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
376
377 /*
378 * Unfortunately ITC_DRIFT is not yet part of the
379 * official SAL spec, so the ITC_DRIFT bit is not
380 * set by the BIOS on this hardware.
381 */
382 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
383
384 cyclone_setup();
385 }
386}
387
388static int __init acpi_parse_madt(struct acpi_table_header *table)
389{
390 if (!table)
391 return -EINVAL;
392
393 acpi_madt = (struct acpi_table_madt *)table;
394
395 acpi_madt_rev = acpi_madt->header.revision;
396
397 /* remember the value for reference after free_initmem() */
398#ifdef CONFIG_ITANIUM
399 has_8259 = 1; /* Firmware on old Itanium systems is broken */
400#else
401 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
402#endif
403 iosapic_system_init(has_8259);
404
405 /* Get base address of IPI Message Block */
406
407 if (acpi_madt->address)
408 ipi_base_addr = ioremap(acpi_madt->address, 0);
409
410 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
411
412 acpi_madt_oem_check(acpi_madt->header.oem_id,
413 acpi_madt->header.oem_table_id);
414
415 return 0;
416}
417
418#ifdef CONFIG_ACPI_NUMA
419
420#undef SLIT_DEBUG
421
422#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
423
424static int __initdata srat_num_cpus; /* number of cpus */
425static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
426#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
427#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
428static struct acpi_table_slit __initdata *slit_table;
429cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
430
431static int __init
432get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
433{
434 int pxm;
435
436 pxm = pa->proximity_domain_lo;
437 if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
438 pxm += pa->proximity_domain_hi[0] << 8;
439 return pxm;
440}
441
442static int __init
443get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
444{
445 int pxm;
446
447 pxm = ma->proximity_domain;
448 if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
449 pxm &= 0xff;
450
451 return pxm;
452}
453
454/*
455 * ACPI 2.0 SLIT (System Locality Information Table)
456 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
457 */
458void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
459{
460 u32 len;
461
462 len = sizeof(struct acpi_table_header) + 8
463 + slit->locality_count * slit->locality_count;
464 if (slit->header.length != len) {
465 printk(KERN_ERR
466 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
467 len, slit->header.length);
468 return;
469 }
470 slit_table = slit;
471}
472
473void __init
474acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
475{
476 int pxm;
477
478 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
479 return;
480
481 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
482 printk_once(KERN_WARNING
483 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
484 ARRAY_SIZE(node_cpuid));
485 return;
486 }
487 pxm = get_processor_proximity_domain(pa);
488
489 /* record this node in proximity bitmap */
490 pxm_bit_set(pxm);
491
492 node_cpuid[srat_num_cpus].phys_id =
493 (pa->apic_id << 8) | (pa->local_sapic_eid);
494 /* nid should be overridden as logical node id later */
495 node_cpuid[srat_num_cpus].nid = pxm;
496 cpu_set(srat_num_cpus, early_cpu_possible_map);
497 srat_num_cpus++;
498}
499
500void __init
501acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
502{
503 unsigned long paddr, size;
504 int pxm;
505 struct node_memblk_s *p, *q, *pend;
506
507 pxm = get_memory_proximity_domain(ma);
508
509 /* fill node memory chunk structure */
510 paddr = ma->base_address;
511 size = ma->length;
512
513 /* Ignore disabled entries */
514 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
515 return;
516
517 /* record this node in proximity bitmap */
518 pxm_bit_set(pxm);
519
520 /* Insertion sort based on base address */
521 pend = &node_memblk[num_node_memblks];
522 for (p = &node_memblk[0]; p < pend; p++) {
523 if (paddr < p->start_paddr)
524 break;
525 }
526 if (p < pend) {
527 for (q = pend - 1; q >= p; q--)
528 *(q + 1) = *q;
529 }
530 p->start_paddr = paddr;
531 p->size = size;
532 p->nid = pxm;
533 num_node_memblks++;
534}
535
536void __init acpi_numa_arch_fixup(void)
537{
538 int i, j, node_from, node_to;
539
540 /* If there's no SRAT, fix the phys_id and mark node 0 online */
541 if (srat_num_cpus == 0) {
542 node_set_online(0);
543 node_cpuid[0].phys_id = hard_smp_processor_id();
544 return;
545 }
546
547 /*
548 * MCD - This can probably be dropped now. No need for pxm ID to node ID
549 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
550 */
551 nodes_clear(node_online_map);
552 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
553 if (pxm_bit_test(i)) {
554 int nid = acpi_map_pxm_to_node(i);
555 node_set_online(nid);
556 }
557 }
558
559 /* set logical node id in memory chunk structure */
560 for (i = 0; i < num_node_memblks; i++)
561 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
562
563 /* assign memory bank numbers for each chunk on each node */
564 for_each_online_node(i) {
565 int bank;
566
567 bank = 0;
568 for (j = 0; j < num_node_memblks; j++)
569 if (node_memblk[j].nid == i)
570 node_memblk[j].bank = bank++;
571 }
572
573 /* set logical node id in cpu structure */
574 for_each_possible_early_cpu(i)
575 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
576
577 printk(KERN_INFO "Number of logical nodes in system = %d\n",
578 num_online_nodes());
579 printk(KERN_INFO "Number of memory chunks in system = %d\n",
580 num_node_memblks);
581
582 if (!slit_table) {
583 for (i = 0; i < MAX_NUMNODES; i++)
584 for (j = 0; j < MAX_NUMNODES; j++)
585 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
586 REMOTE_DISTANCE;
587 return;
588 }
589
590 memset(numa_slit, -1, sizeof(numa_slit));
591 for (i = 0; i < slit_table->locality_count; i++) {
592 if (!pxm_bit_test(i))
593 continue;
594 node_from = pxm_to_node(i);
595 for (j = 0; j < slit_table->locality_count; j++) {
596 if (!pxm_bit_test(j))
597 continue;
598 node_to = pxm_to_node(j);
599 node_distance(node_from, node_to) =
600 slit_table->entry[i * slit_table->locality_count + j];
601 }
602 }
603
604#ifdef SLIT_DEBUG
605 printk("ACPI 2.0 SLIT locality table:\n");
606 for_each_online_node(i) {
607 for_each_online_node(j)
608 printk("%03d ", node_distance(i, j));
609 printk("\n");
610 }
611#endif
612}
613#endif /* CONFIG_ACPI_NUMA */
614
615/*
616 * success: return IRQ number (>=0)
617 * failure: return < 0
618 */
619int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
620{
621 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
622 return gsi;
623
624 if (has_8259 && gsi < 16)
625 return isa_irq_to_vector(gsi);
626
627 return iosapic_register_intr(gsi,
628 (polarity ==
629 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
630 IOSAPIC_POL_LOW,
631 (triggering ==
632 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
633 IOSAPIC_LEVEL);
634}
635
636void acpi_unregister_gsi(u32 gsi)
637{
638 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
639 return;
640
641 if (has_8259 && gsi < 16)
642 return;
643
644 iosapic_unregister_intr(gsi);
645}
646
647static int __init acpi_parse_fadt(struct acpi_table_header *table)
648{
649 struct acpi_table_header *fadt_header;
650 struct acpi_table_fadt *fadt;
651
652 if (!table)
653 return -EINVAL;
654
655 fadt_header = (struct acpi_table_header *)table;
656 if (fadt_header->revision != 3)
657 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
658
659 fadt = (struct acpi_table_fadt *)fadt_header;
660
661 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
662 ACPI_ACTIVE_LOW);
663 return 0;
664}
665
666int __init early_acpi_boot_init(void)
667{
668 int ret;
669
670 /*
671 * do a partial walk of MADT to determine how many CPUs
672 * we have including offline CPUs
673 */
674 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
675 printk(KERN_ERR PREFIX "Can't find MADT\n");
676 return 0;
677 }
678
679 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
680 acpi_parse_lsapic, NR_CPUS);
681 if (ret < 1)
682 printk(KERN_ERR PREFIX
683 "Error parsing MADT - no LAPIC entries\n");
684
685#ifdef CONFIG_SMP
686 if (available_cpus == 0) {
687 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
688 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
689 smp_boot_data.cpu_phys_id[available_cpus] =
690 hard_smp_processor_id();
691 available_cpus = 1; /* We've got at least one of these, no? */
692 }
693 smp_boot_data.cpu_count = available_cpus;
694#endif
695 /* Make boot-up look pretty */
696 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
697 total_cpus);
698
699 return 0;
700}
701
702int __init acpi_boot_init(void)
703{
704
705 /*
706 * MADT
707 * ----
708 * Parse the Multiple APIC Description Table (MADT), if exists.
709 * Note that this table provides platform SMP configuration
710 * information -- the successor to MPS tables.
711 */
712
713 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
714 printk(KERN_ERR PREFIX "Can't find MADT\n");
715 goto skip_madt;
716 }
717
718 /* Local APIC */
719
720 if (acpi_table_parse_madt
721 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
722 printk(KERN_ERR PREFIX
723 "Error parsing LAPIC address override entry\n");
724
725 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
726 < 0)
727 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
728
729 /* I/O APIC */
730
731 if (acpi_table_parse_madt
732 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
733 if (!ia64_platform_is("sn2"))
734 printk(KERN_ERR PREFIX
735 "Error parsing MADT - no IOSAPIC entries\n");
736 }
737
738 /* System-Level Interrupt Routing */
739
740 if (acpi_table_parse_madt
741 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
742 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
743 printk(KERN_ERR PREFIX
744 "Error parsing platform interrupt source entry\n");
745
746 if (acpi_table_parse_madt
747 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
748 printk(KERN_ERR PREFIX
749 "Error parsing interrupt source overrides entry\n");
750
751 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
752 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
753 skip_madt:
754
755 /*
756 * FADT says whether a legacy keyboard controller is present.
757 * The FADT also contains an SCI_INT line, by which the system
758 * gets interrupts such as power and sleep buttons. If it's not
759 * on a Legacy interrupt, it needs to be setup.
760 */
761 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
762 printk(KERN_ERR PREFIX "Can't find FADT\n");
763
764#ifdef CONFIG_ACPI_NUMA
765#ifdef CONFIG_SMP
766 if (srat_num_cpus == 0) {
767 int cpu, i = 1;
768 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
769 if (smp_boot_data.cpu_phys_id[cpu] !=
770 hard_smp_processor_id())
771 node_cpuid[i++].phys_id =
772 smp_boot_data.cpu_phys_id[cpu];
773 }
774#endif
775 build_cpu_to_node_map();
776#endif
777 return 0;
778}
779
780int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
781{
782 int tmp;
783
784 if (has_8259 && gsi < 16)
785 *irq = isa_irq_to_vector(gsi);
786 else {
787 tmp = gsi_to_irq(gsi);
788 if (tmp == -1)
789 return -1;
790 *irq = tmp;
791 }
792 return 0;
793}
794
795int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
796{
797 if (isa_irq >= 16)
798 return -1;
799 *gsi = isa_irq;
800 return 0;
801}
802
803/*
804 * ACPI based hotplug CPU support
805 */
806#ifdef CONFIG_ACPI_HOTPLUG_CPU
807static __cpuinit
808int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
809{
810#ifdef CONFIG_ACPI_NUMA
811 int pxm_id;
812 int nid;
813
814 pxm_id = acpi_get_pxm(handle);
815 /*
816 * We don't have cpu-only-node hotadd. But if the system equips
817 * SRAT table, pxm is already found and node is ready.
818 * So, just pxm_to_nid(pxm) is OK.
819 * This code here is for the system which doesn't have full SRAT
820 * table for possible cpus.
821 */
822 nid = acpi_map_pxm_to_node(pxm_id);
823 node_cpuid[cpu].phys_id = physid;
824 node_cpuid[cpu].nid = nid;
825#endif
826 return (0);
827}
828
829int additional_cpus __initdata = -1;
830
831static __init int setup_additional_cpus(char *s)
832{
833 if (s)
834 additional_cpus = simple_strtol(s, NULL, 0);
835
836 return 0;
837}
838
839early_param("additional_cpus", setup_additional_cpus);
840
841/*
842 * cpu_possible_mask should be static, it cannot change as CPUs
843 * are onlined, or offlined. The reason is per-cpu data-structures
844 * are allocated by some modules at init time, and dont expect to
845 * do this dynamically on cpu arrival/departure.
846 * cpu_present_mask on the other hand can change dynamically.
847 * In case when cpu_hotplug is not compiled, then we resort to current
848 * behaviour, which is cpu_possible == cpu_present.
849 * - Ashok Raj
850 *
851 * Three ways to find out the number of additional hotplug CPUs:
852 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
853 * - The user can overwrite it with additional_cpus=NUM
854 * - Otherwise don't reserve additional CPUs.
855 */
856__init void prefill_possible_map(void)
857{
858 int i;
859 int possible, disabled_cpus;
860
861 disabled_cpus = total_cpus - available_cpus;
862
863 if (additional_cpus == -1) {
864 if (disabled_cpus > 0)
865 additional_cpus = disabled_cpus;
866 else
867 additional_cpus = 0;
868 }
869
870 possible = available_cpus + additional_cpus;
871
872 if (possible > nr_cpu_ids)
873 possible = nr_cpu_ids;
874
875 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
876 possible, max((possible - available_cpus), 0));
877
878 for (i = 0; i < possible; i++)
879 set_cpu_possible(i, true);
880}
881
882static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
883{
884 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
885 union acpi_object *obj;
886 struct acpi_madt_local_sapic *lsapic;
887 cpumask_t tmp_map;
888 int cpu, physid;
889
890 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
891 return -EINVAL;
892
893 if (!buffer.length || !buffer.pointer)
894 return -EINVAL;
895
896 obj = buffer.pointer;
897 if (obj->type != ACPI_TYPE_BUFFER)
898 {
899 kfree(buffer.pointer);
900 return -EINVAL;
901 }
902
903 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
904
905 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
906 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
907 kfree(buffer.pointer);
908 return -EINVAL;
909 }
910
911 physid = ((lsapic->id << 8) | (lsapic->eid));
912
913 kfree(buffer.pointer);
914 buffer.length = ACPI_ALLOCATE_BUFFER;
915 buffer.pointer = NULL;
916
917 cpumask_complement(&tmp_map, cpu_present_mask);
918 cpu = cpumask_first(&tmp_map);
919 if (cpu >= nr_cpu_ids)
920 return -EINVAL;
921
922 acpi_map_cpu2node(handle, cpu, physid);
923
924 set_cpu_present(cpu, true);
925 ia64_cpu_to_sapicid[cpu] = physid;
926
927 acpi_processor_set_pdc(handle);
928
929 *pcpu = cpu;
930 return (0);
931}
932
933/* wrapper to silence section mismatch warning */
934int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
935{
936 return _acpi_map_lsapic(handle, pcpu);
937}
938EXPORT_SYMBOL(acpi_map_lsapic);
939
940int acpi_unmap_lsapic(int cpu)
941{
942 ia64_cpu_to_sapicid[cpu] = -1;
943 set_cpu_present(cpu, false);
944
945#ifdef CONFIG_ACPI_NUMA
946 /* NUMA specific cleanup's */
947#endif
948
949 return (0);
950}
951
952EXPORT_SYMBOL(acpi_unmap_lsapic);
953#endif /* CONFIG_ACPI_HOTPLUG_CPU */
954
955#ifdef CONFIG_ACPI_NUMA
956static acpi_status __devinit
957acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
958{
959 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
960 union acpi_object *obj;
961 struct acpi_madt_io_sapic *iosapic;
962 unsigned int gsi_base;
963 int pxm, node;
964
965 /* Only care about objects w/ a method that returns the MADT */
966 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
967 return AE_OK;
968
969 if (!buffer.length || !buffer.pointer)
970 return AE_OK;
971
972 obj = buffer.pointer;
973 if (obj->type != ACPI_TYPE_BUFFER ||
974 obj->buffer.length < sizeof(*iosapic)) {
975 kfree(buffer.pointer);
976 return AE_OK;
977 }
978
979 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
980
981 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
982 kfree(buffer.pointer);
983 return AE_OK;
984 }
985
986 gsi_base = iosapic->global_irq_base;
987
988 kfree(buffer.pointer);
989
990 /*
991 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
992 * us which node to associate this with.
993 */
994 pxm = acpi_get_pxm(handle);
995 if (pxm < 0)
996 return AE_OK;
997
998 node = pxm_to_node(pxm);
999
1000 if (node >= MAX_NUMNODES || !node_online(node) ||
1001 cpumask_empty(cpumask_of_node(node)))
1002 return AE_OK;
1003
1004 /* We know a gsi to node mapping! */
1005 map_iosapic_to_node(gsi_base, node);
1006 return AE_OK;
1007}
1008
1009static int __init
1010acpi_map_iosapics (void)
1011{
1012 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1013 return 0;
1014}
1015
1016fs_initcall(acpi_map_iosapics);
1017#endif /* CONFIG_ACPI_NUMA */
1018
1019int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1020{
1021 int err;
1022
1023 if ((err = iosapic_init(phys_addr, gsi_base)))
1024 return err;
1025
1026#ifdef CONFIG_ACPI_NUMA
1027 acpi_map_iosapic(handle, 0, NULL, NULL);
1028#endif /* CONFIG_ACPI_NUMA */
1029
1030 return 0;
1031}
1032
1033EXPORT_SYMBOL(acpi_register_ioapic);
1034
1035int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1036{
1037 return iosapic_remove(gsi_base);
1038}
1039
1040EXPORT_SYMBOL(acpi_unregister_ioapic);
1041
1042/*
1043 * acpi_suspend_lowlevel() - save kernel state and suspend.
1044 *
1045 * TBD when when IA64 starts to support suspend...
1046 */
1047int acpi_suspend_lowlevel(void) { return 0; }