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Merge branch 'drm-nouveau-fixes' of git://anongit.freedesktop.org/git/nouveau/linux...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / ia64 / kernel / acpi.c
1 /*
2 * acpi.c - Architecture-Specific Low-Level ACPI Support
3 *
4 * Copyright (C) 1999 VA Linux Systems
5 * Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
6 * Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Copyright (C) 2000 Intel Corp.
9 * Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
10 * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
11 * Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
12 * Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
13 * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
14 * Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
15 *
16 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 *
32 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
33 */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/smp.h>
40 #include <linux/string.h>
41 #include <linux/types.h>
42 #include <linux/irq.h>
43 #include <linux/acpi.h>
44 #include <linux/efi.h>
45 #include <linux/mmzone.h>
46 #include <linux/nodemask.h>
47 #include <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
64 u32 acpi_rsdt_forced;
65 unsigned int acpi_cpei_override;
66 unsigned int acpi_cpei_phys_cpuid;
67
68 unsigned long acpi_wakeup_address = 0;
69
70 #ifdef CONFIG_IA64_GENERIC
71 static 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
83 const char __init *
84 acpi_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. */
146 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
147 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
148 };
149
150 enum 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 */
156 int 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
169 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
170 {
171 return __va(phys_addr);
172 }
173
174 void __init __acpi_unmap_table(char *map, unsigned long size)
175 {
176 }
177
178 /* --------------------------------------------------------------------------
179 Boot-time Table Parsing
180 -------------------------------------------------------------------------- */
181
182 static int available_cpus __initdata;
183 struct acpi_table_madt *acpi_madt __initdata;
184 static u8 has_8259;
185
186 static int __init
187 acpi_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
204 static int __init
205 acpi_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
225 static int __init
226 acpi_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
239 static int __init
240 acpi_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
252 static unsigned int __initdata acpi_madt_rev;
253
254 static int __init
255 acpi_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
296 unsigned 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
315 unsigned 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
327 void set_cpei_target_cpu(unsigned int cpu)
328 {
329 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
330 }
331 #endif
332
333 unsigned int get_cpei_target_cpu(void)
334 {
335 return acpi_cpei_phys_cpuid;
336 }
337
338 static int __init
339 acpi_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
359 static int __init
360 acpi_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
373 static 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
388 static 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
424 static int __initdata srat_num_cpus; /* number of cpus */
425 static u32 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))
428 static struct acpi_table_slit __initdata *slit_table;
429 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
430
431 static int __init
432 get_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
442 static int __init
443 get_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 */
458 void __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
473 void __init
474 acpi_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
500 int __init
501 acpi_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 -1;
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 return 0;
535 }
536
537 void __init acpi_numa_arch_fixup(void)
538 {
539 int i, j, node_from, node_to;
540
541 /* If there's no SRAT, fix the phys_id and mark node 0 online */
542 if (srat_num_cpus == 0) {
543 node_set_online(0);
544 node_cpuid[0].phys_id = hard_smp_processor_id();
545 return;
546 }
547
548 /*
549 * MCD - This can probably be dropped now. No need for pxm ID to node ID
550 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
551 */
552 nodes_clear(node_online_map);
553 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
554 if (pxm_bit_test(i)) {
555 int nid = acpi_map_pxm_to_node(i);
556 node_set_online(nid);
557 }
558 }
559
560 /* set logical node id in memory chunk structure */
561 for (i = 0; i < num_node_memblks; i++)
562 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
563
564 /* assign memory bank numbers for each chunk on each node */
565 for_each_online_node(i) {
566 int bank;
567
568 bank = 0;
569 for (j = 0; j < num_node_memblks; j++)
570 if (node_memblk[j].nid == i)
571 node_memblk[j].bank = bank++;
572 }
573
574 /* set logical node id in cpu structure */
575 for_each_possible_early_cpu(i)
576 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
577
578 printk(KERN_INFO "Number of logical nodes in system = %d\n",
579 num_online_nodes());
580 printk(KERN_INFO "Number of memory chunks in system = %d\n",
581 num_node_memblks);
582
583 if (!slit_table) {
584 for (i = 0; i < MAX_NUMNODES; i++)
585 for (j = 0; j < MAX_NUMNODES; j++)
586 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
587 REMOTE_DISTANCE;
588 return;
589 }
590
591 memset(numa_slit, -1, sizeof(numa_slit));
592 for (i = 0; i < slit_table->locality_count; i++) {
593 if (!pxm_bit_test(i))
594 continue;
595 node_from = pxm_to_node(i);
596 for (j = 0; j < slit_table->locality_count; j++) {
597 if (!pxm_bit_test(j))
598 continue;
599 node_to = pxm_to_node(j);
600 node_distance(node_from, node_to) =
601 slit_table->entry[i * slit_table->locality_count + j];
602 }
603 }
604
605 #ifdef SLIT_DEBUG
606 printk("ACPI 2.0 SLIT locality table:\n");
607 for_each_online_node(i) {
608 for_each_online_node(j)
609 printk("%03d ", node_distance(i, j));
610 printk("\n");
611 }
612 #endif
613 }
614 #endif /* CONFIG_ACPI_NUMA */
615
616 /*
617 * success: return IRQ number (>=0)
618 * failure: return < 0
619 */
620 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
621 {
622 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
623 return gsi;
624
625 if (has_8259 && gsi < 16)
626 return isa_irq_to_vector(gsi);
627
628 return iosapic_register_intr(gsi,
629 (polarity ==
630 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
631 IOSAPIC_POL_LOW,
632 (triggering ==
633 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
634 IOSAPIC_LEVEL);
635 }
636 EXPORT_SYMBOL_GPL(acpi_register_gsi);
637
638 void acpi_unregister_gsi(u32 gsi)
639 {
640 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
641 return;
642
643 if (has_8259 && gsi < 16)
644 return;
645
646 iosapic_unregister_intr(gsi);
647 }
648 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
649
650 static int __init acpi_parse_fadt(struct acpi_table_header *table)
651 {
652 struct acpi_table_header *fadt_header;
653 struct acpi_table_fadt *fadt;
654
655 if (!table)
656 return -EINVAL;
657
658 fadt_header = (struct acpi_table_header *)table;
659 if (fadt_header->revision != 3)
660 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
661
662 fadt = (struct acpi_table_fadt *)fadt_header;
663
664 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
665 ACPI_ACTIVE_LOW);
666 return 0;
667 }
668
669 int __init early_acpi_boot_init(void)
670 {
671 int ret;
672
673 /*
674 * do a partial walk of MADT to determine how many CPUs
675 * we have including offline CPUs
676 */
677 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
678 printk(KERN_ERR PREFIX "Can't find MADT\n");
679 return 0;
680 }
681
682 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
683 acpi_parse_lsapic, NR_CPUS);
684 if (ret < 1)
685 printk(KERN_ERR PREFIX
686 "Error parsing MADT - no LAPIC entries\n");
687
688 #ifdef CONFIG_SMP
689 if (available_cpus == 0) {
690 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
691 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
692 smp_boot_data.cpu_phys_id[available_cpus] =
693 hard_smp_processor_id();
694 available_cpus = 1; /* We've got at least one of these, no? */
695 }
696 smp_boot_data.cpu_count = available_cpus;
697 #endif
698 /* Make boot-up look pretty */
699 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
700 total_cpus);
701
702 return 0;
703 }
704
705 int __init acpi_boot_init(void)
706 {
707
708 /*
709 * MADT
710 * ----
711 * Parse the Multiple APIC Description Table (MADT), if exists.
712 * Note that this table provides platform SMP configuration
713 * information -- the successor to MPS tables.
714 */
715
716 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
717 printk(KERN_ERR PREFIX "Can't find MADT\n");
718 goto skip_madt;
719 }
720
721 /* Local APIC */
722
723 if (acpi_table_parse_madt
724 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
725 printk(KERN_ERR PREFIX
726 "Error parsing LAPIC address override entry\n");
727
728 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
729 < 0)
730 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
731
732 /* I/O APIC */
733
734 if (acpi_table_parse_madt
735 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
736 if (!ia64_platform_is("sn2"))
737 printk(KERN_ERR PREFIX
738 "Error parsing MADT - no IOSAPIC entries\n");
739 }
740
741 /* System-Level Interrupt Routing */
742
743 if (acpi_table_parse_madt
744 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
745 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
746 printk(KERN_ERR PREFIX
747 "Error parsing platform interrupt source entry\n");
748
749 if (acpi_table_parse_madt
750 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
751 printk(KERN_ERR PREFIX
752 "Error parsing interrupt source overrides entry\n");
753
754 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
755 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
756 skip_madt:
757
758 /*
759 * FADT says whether a legacy keyboard controller is present.
760 * The FADT also contains an SCI_INT line, by which the system
761 * gets interrupts such as power and sleep buttons. If it's not
762 * on a Legacy interrupt, it needs to be setup.
763 */
764 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
765 printk(KERN_ERR PREFIX "Can't find FADT\n");
766
767 #ifdef CONFIG_ACPI_NUMA
768 #ifdef CONFIG_SMP
769 if (srat_num_cpus == 0) {
770 int cpu, i = 1;
771 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
772 if (smp_boot_data.cpu_phys_id[cpu] !=
773 hard_smp_processor_id())
774 node_cpuid[i++].phys_id =
775 smp_boot_data.cpu_phys_id[cpu];
776 }
777 #endif
778 build_cpu_to_node_map();
779 #endif
780 return 0;
781 }
782
783 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
784 {
785 int tmp;
786
787 if (has_8259 && gsi < 16)
788 *irq = isa_irq_to_vector(gsi);
789 else {
790 tmp = gsi_to_irq(gsi);
791 if (tmp == -1)
792 return -1;
793 *irq = tmp;
794 }
795 return 0;
796 }
797
798 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
799 {
800 if (isa_irq >= 16)
801 return -1;
802 *gsi = isa_irq;
803 return 0;
804 }
805
806 /*
807 * ACPI based hotplug CPU support
808 */
809 #ifdef CONFIG_ACPI_HOTPLUG_CPU
810 static __cpuinit
811 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
812 {
813 #ifdef CONFIG_ACPI_NUMA
814 int pxm_id;
815 int nid;
816
817 pxm_id = acpi_get_pxm(handle);
818 /*
819 * We don't have cpu-only-node hotadd. But if the system equips
820 * SRAT table, pxm is already found and node is ready.
821 * So, just pxm_to_nid(pxm) is OK.
822 * This code here is for the system which doesn't have full SRAT
823 * table for possible cpus.
824 */
825 nid = acpi_map_pxm_to_node(pxm_id);
826 node_cpuid[cpu].phys_id = physid;
827 node_cpuid[cpu].nid = nid;
828 #endif
829 return (0);
830 }
831
832 int additional_cpus __initdata = -1;
833
834 static __init int setup_additional_cpus(char *s)
835 {
836 if (s)
837 additional_cpus = simple_strtol(s, NULL, 0);
838
839 return 0;
840 }
841
842 early_param("additional_cpus", setup_additional_cpus);
843
844 /*
845 * cpu_possible_mask should be static, it cannot change as CPUs
846 * are onlined, or offlined. The reason is per-cpu data-structures
847 * are allocated by some modules at init time, and dont expect to
848 * do this dynamically on cpu arrival/departure.
849 * cpu_present_mask on the other hand can change dynamically.
850 * In case when cpu_hotplug is not compiled, then we resort to current
851 * behaviour, which is cpu_possible == cpu_present.
852 * - Ashok Raj
853 *
854 * Three ways to find out the number of additional hotplug CPUs:
855 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
856 * - The user can overwrite it with additional_cpus=NUM
857 * - Otherwise don't reserve additional CPUs.
858 */
859 __init void prefill_possible_map(void)
860 {
861 int i;
862 int possible, disabled_cpus;
863
864 disabled_cpus = total_cpus - available_cpus;
865
866 if (additional_cpus == -1) {
867 if (disabled_cpus > 0)
868 additional_cpus = disabled_cpus;
869 else
870 additional_cpus = 0;
871 }
872
873 possible = available_cpus + additional_cpus;
874
875 if (possible > nr_cpu_ids)
876 possible = nr_cpu_ids;
877
878 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
879 possible, max((possible - available_cpus), 0));
880
881 for (i = 0; i < possible; i++)
882 set_cpu_possible(i, true);
883 }
884
885 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
886 {
887 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
888 union acpi_object *obj;
889 struct acpi_madt_local_sapic *lsapic;
890 cpumask_t tmp_map;
891 int cpu, physid;
892
893 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
894 return -EINVAL;
895
896 if (!buffer.length || !buffer.pointer)
897 return -EINVAL;
898
899 obj = buffer.pointer;
900 if (obj->type != ACPI_TYPE_BUFFER)
901 {
902 kfree(buffer.pointer);
903 return -EINVAL;
904 }
905
906 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
907
908 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
909 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
910 kfree(buffer.pointer);
911 return -EINVAL;
912 }
913
914 physid = ((lsapic->id << 8) | (lsapic->eid));
915
916 kfree(buffer.pointer);
917 buffer.length = ACPI_ALLOCATE_BUFFER;
918 buffer.pointer = NULL;
919
920 cpumask_complement(&tmp_map, cpu_present_mask);
921 cpu = cpumask_first(&tmp_map);
922 if (cpu >= nr_cpu_ids)
923 return -EINVAL;
924
925 acpi_map_cpu2node(handle, cpu, physid);
926
927 set_cpu_present(cpu, true);
928 ia64_cpu_to_sapicid[cpu] = physid;
929
930 acpi_processor_set_pdc(handle);
931
932 *pcpu = cpu;
933 return (0);
934 }
935
936 /* wrapper to silence section mismatch warning */
937 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
938 {
939 return _acpi_map_lsapic(handle, pcpu);
940 }
941 EXPORT_SYMBOL(acpi_map_lsapic);
942
943 int acpi_unmap_lsapic(int cpu)
944 {
945 ia64_cpu_to_sapicid[cpu] = -1;
946 set_cpu_present(cpu, false);
947
948 #ifdef CONFIG_ACPI_NUMA
949 /* NUMA specific cleanup's */
950 #endif
951
952 return (0);
953 }
954
955 EXPORT_SYMBOL(acpi_unmap_lsapic);
956 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
957
958 #ifdef CONFIG_ACPI_NUMA
959 static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
960 void *context, void **ret)
961 {
962 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
963 union acpi_object *obj;
964 struct acpi_madt_io_sapic *iosapic;
965 unsigned int gsi_base;
966 int pxm, node;
967
968 /* Only care about objects w/ a method that returns the MADT */
969 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
970 return AE_OK;
971
972 if (!buffer.length || !buffer.pointer)
973 return AE_OK;
974
975 obj = buffer.pointer;
976 if (obj->type != ACPI_TYPE_BUFFER ||
977 obj->buffer.length < sizeof(*iosapic)) {
978 kfree(buffer.pointer);
979 return AE_OK;
980 }
981
982 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
983
984 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
985 kfree(buffer.pointer);
986 return AE_OK;
987 }
988
989 gsi_base = iosapic->global_irq_base;
990
991 kfree(buffer.pointer);
992
993 /*
994 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
995 * us which node to associate this with.
996 */
997 pxm = acpi_get_pxm(handle);
998 if (pxm < 0)
999 return AE_OK;
1000
1001 node = pxm_to_node(pxm);
1002
1003 if (node >= MAX_NUMNODES || !node_online(node) ||
1004 cpumask_empty(cpumask_of_node(node)))
1005 return AE_OK;
1006
1007 /* We know a gsi to node mapping! */
1008 map_iosapic_to_node(gsi_base, node);
1009 return AE_OK;
1010 }
1011
1012 static int __init
1013 acpi_map_iosapics (void)
1014 {
1015 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1016 return 0;
1017 }
1018
1019 fs_initcall(acpi_map_iosapics);
1020 #endif /* CONFIG_ACPI_NUMA */
1021
1022 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1023 {
1024 int err;
1025
1026 if ((err = iosapic_init(phys_addr, gsi_base)))
1027 return err;
1028
1029 #ifdef CONFIG_ACPI_NUMA
1030 acpi_map_iosapic(handle, 0, NULL, NULL);
1031 #endif /* CONFIG_ACPI_NUMA */
1032
1033 return 0;
1034 }
1035
1036 EXPORT_SYMBOL(acpi_register_ioapic);
1037
1038 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1039 {
1040 return iosapic_remove(gsi_base);
1041 }
1042
1043 EXPORT_SYMBOL(acpi_unregister_ioapic);
1044
1045 /*
1046 * acpi_suspend_lowlevel() - save kernel state and suspend.
1047 *
1048 * TBD when when IA64 starts to support suspend...
1049 */
1050 int acpi_suspend_lowlevel(void) { return 0; }
kernel source for telekom puls (alcatel/mediatek)