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