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Merge branches 'release', 'misc' and 'misc-2.6.25' into release
[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 <asm/io.h>
48 #include <asm/iosapic.h>
49 #include <asm/machvec.h>
50 #include <asm/page.h>
51 #include <asm/system.h>
52 #include <asm/numa.h>
53 #include <asm/sal.h>
54 #include <asm/cyclone.h>
55
56 #define BAD_MADT_ENTRY(entry, end) ( \
57 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
58 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
59
60 #define PREFIX "ACPI: "
61
62 void (*pm_idle) (void);
63 EXPORT_SYMBOL(pm_idle);
64 void (*pm_power_off) (void);
65 EXPORT_SYMBOL(pm_power_off);
66
67 unsigned int acpi_cpei_override;
68 unsigned int acpi_cpei_phys_cpuid;
69
70 unsigned long acpi_wakeup_address = 0;
71
72 #ifdef CONFIG_IA64_GENERIC
73 static unsigned long __init acpi_find_rsdp(void)
74 {
75 unsigned long rsdp_phys = 0;
76
77 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
78 rsdp_phys = efi.acpi20;
79 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
80 printk(KERN_WARNING PREFIX
81 "v1.0/r0.71 tables no longer supported\n");
82 return rsdp_phys;
83 }
84 #endif
85
86 const char __init *
87 acpi_get_sysname(void)
88 {
89 #ifdef CONFIG_IA64_GENERIC
90 unsigned long rsdp_phys;
91 struct acpi_table_rsdp *rsdp;
92 struct acpi_table_xsdt *xsdt;
93 struct acpi_table_header *hdr;
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 return "sn2";
121 }
122
123 return "dig";
124 #else
125 # if defined (CONFIG_IA64_HP_SIM)
126 return "hpsim";
127 # elif defined (CONFIG_IA64_HP_ZX1)
128 return "hpzx1";
129 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
130 return "hpzx1_swiotlb";
131 # elif defined (CONFIG_IA64_SGI_SN2)
132 return "sn2";
133 # elif defined (CONFIG_IA64_DIG)
134 return "dig";
135 # else
136 # error Unknown platform. Fix acpi.c.
137 # endif
138 #endif
139 }
140
141 #ifdef CONFIG_ACPI
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 /* --------------------------------------------------------------------------
175 Boot-time Table Parsing
176 -------------------------------------------------------------------------- */
177
178 static int total_cpus __initdata;
179 static int available_cpus __initdata;
180 struct acpi_table_madt *acpi_madt __initdata;
181 static u8 has_8259;
182
183 static int __init
184 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
185 const unsigned long end)
186 {
187 struct acpi_madt_local_apic_override *lapic;
188
189 lapic = (struct acpi_madt_local_apic_override *)header;
190
191 if (BAD_MADT_ENTRY(lapic, end))
192 return -EINVAL;
193
194 if (lapic->address) {
195 iounmap(ipi_base_addr);
196 ipi_base_addr = ioremap(lapic->address, 0);
197 }
198 return 0;
199 }
200
201 static int __init
202 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
203 {
204 struct acpi_madt_local_sapic *lsapic;
205
206 lsapic = (struct acpi_madt_local_sapic *)header;
207
208 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
209
210 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
211 #ifdef CONFIG_SMP
212 smp_boot_data.cpu_phys_id[available_cpus] =
213 (lsapic->id << 8) | lsapic->eid;
214 #endif
215 ++available_cpus;
216 }
217
218 total_cpus++;
219 return 0;
220 }
221
222 static int __init
223 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
224 {
225 struct acpi_madt_local_apic_nmi *lacpi_nmi;
226
227 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
228
229 if (BAD_MADT_ENTRY(lacpi_nmi, end))
230 return -EINVAL;
231
232 /* TBD: Support lapic_nmi entries */
233 return 0;
234 }
235
236 static int __init
237 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
238 {
239 struct acpi_madt_io_sapic *iosapic;
240
241 iosapic = (struct acpi_madt_io_sapic *)header;
242
243 if (BAD_MADT_ENTRY(iosapic, end))
244 return -EINVAL;
245
246 return iosapic_init(iosapic->address, iosapic->global_irq_base);
247 }
248
249 static unsigned int __initdata acpi_madt_rev;
250
251 static int __init
252 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
253 const unsigned long end)
254 {
255 struct acpi_madt_interrupt_source *plintsrc;
256 int vector;
257
258 plintsrc = (struct acpi_madt_interrupt_source *)header;
259
260 if (BAD_MADT_ENTRY(plintsrc, end))
261 return -EINVAL;
262
263 /*
264 * Get vector assignment for this interrupt, set attributes,
265 * and program the IOSAPIC routing table.
266 */
267 vector = iosapic_register_platform_intr(plintsrc->type,
268 plintsrc->global_irq,
269 plintsrc->io_sapic_vector,
270 plintsrc->eid,
271 plintsrc->id,
272 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
273 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
274 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
275 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
276 ACPI_MADT_TRIGGER_EDGE) ?
277 IOSAPIC_EDGE : IOSAPIC_LEVEL);
278
279 platform_intr_list[plintsrc->type] = vector;
280 if (acpi_madt_rev > 1) {
281 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
282 }
283
284 /*
285 * Save the physical id, so we can check when its being removed
286 */
287 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
288
289 return 0;
290 }
291
292 #ifdef CONFIG_HOTPLUG_CPU
293 unsigned int can_cpei_retarget(void)
294 {
295 extern int cpe_vector;
296 extern unsigned int force_cpei_retarget;
297
298 /*
299 * Only if CPEI is supported and the override flag
300 * is present, otherwise return that its re-targettable
301 * if we are in polling mode.
302 */
303 if (cpe_vector > 0) {
304 if (acpi_cpei_override || force_cpei_retarget)
305 return 1;
306 else
307 return 0;
308 }
309 return 1;
310 }
311
312 unsigned int is_cpu_cpei_target(unsigned int cpu)
313 {
314 unsigned int logical_id;
315
316 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
317
318 if (logical_id == cpu)
319 return 1;
320 else
321 return 0;
322 }
323
324 void set_cpei_target_cpu(unsigned int cpu)
325 {
326 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
327 }
328 #endif
329
330 unsigned int get_cpei_target_cpu(void)
331 {
332 return acpi_cpei_phys_cpuid;
333 }
334
335 static int __init
336 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
337 const unsigned long end)
338 {
339 struct acpi_madt_interrupt_override *p;
340
341 p = (struct acpi_madt_interrupt_override *)header;
342
343 if (BAD_MADT_ENTRY(p, end))
344 return -EINVAL;
345
346 iosapic_override_isa_irq(p->source_irq, p->global_irq,
347 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
348 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
349 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
350 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
351 ACPI_MADT_TRIGGER_EDGE) ?
352 IOSAPIC_EDGE : IOSAPIC_LEVEL);
353 return 0;
354 }
355
356 static int __init
357 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
358 {
359 struct acpi_madt_nmi_source *nmi_src;
360
361 nmi_src = (struct acpi_madt_nmi_source *)header;
362
363 if (BAD_MADT_ENTRY(nmi_src, end))
364 return -EINVAL;
365
366 /* TBD: Support nimsrc entries */
367 return 0;
368 }
369
370 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
371 {
372 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
373
374 /*
375 * Unfortunately ITC_DRIFT is not yet part of the
376 * official SAL spec, so the ITC_DRIFT bit is not
377 * set by the BIOS on this hardware.
378 */
379 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
380
381 cyclone_setup();
382 }
383 }
384
385 static int __init acpi_parse_madt(struct acpi_table_header *table)
386 {
387 if (!table)
388 return -EINVAL;
389
390 acpi_madt = (struct acpi_table_madt *)table;
391
392 acpi_madt_rev = acpi_madt->header.revision;
393
394 /* remember the value for reference after free_initmem() */
395 #ifdef CONFIG_ITANIUM
396 has_8259 = 1; /* Firmware on old Itanium systems is broken */
397 #else
398 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
399 #endif
400 iosapic_system_init(has_8259);
401
402 /* Get base address of IPI Message Block */
403
404 if (acpi_madt->address)
405 ipi_base_addr = ioremap(acpi_madt->address, 0);
406
407 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
408
409 acpi_madt_oem_check(acpi_madt->header.oem_id,
410 acpi_madt->header.oem_table_id);
411
412 return 0;
413 }
414
415 #ifdef CONFIG_ACPI_NUMA
416
417 #undef SLIT_DEBUG
418
419 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
420
421 static int __initdata srat_num_cpus; /* number of cpus */
422 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
423 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
424 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
425 static struct acpi_table_slit __initdata *slit_table;
426
427 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
428 {
429 int pxm;
430
431 pxm = pa->proximity_domain_lo;
432 if (ia64_platform_is("sn2"))
433 pxm += pa->proximity_domain_hi[0] << 8;
434 return pxm;
435 }
436
437 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
438 {
439 int pxm;
440
441 pxm = ma->proximity_domain;
442 if (!ia64_platform_is("sn2"))
443 pxm &= 0xff;
444
445 return pxm;
446 }
447
448 /*
449 * ACPI 2.0 SLIT (System Locality Information Table)
450 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
451 */
452 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
453 {
454 u32 len;
455
456 len = sizeof(struct acpi_table_header) + 8
457 + slit->locality_count * slit->locality_count;
458 if (slit->header.length != len) {
459 printk(KERN_ERR
460 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
461 len, slit->header.length);
462 memset(numa_slit, 10, sizeof(numa_slit));
463 return;
464 }
465 slit_table = slit;
466 }
467
468 void __init
469 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
470 {
471 int pxm;
472
473 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
474 return;
475
476 pxm = get_processor_proximity_domain(pa);
477
478 /* record this node in proximity bitmap */
479 pxm_bit_set(pxm);
480
481 node_cpuid[srat_num_cpus].phys_id =
482 (pa->apic_id << 8) | (pa->local_sapic_eid);
483 /* nid should be overridden as logical node id later */
484 node_cpuid[srat_num_cpus].nid = pxm;
485 srat_num_cpus++;
486 }
487
488 void __init
489 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
490 {
491 unsigned long paddr, size;
492 int pxm;
493 struct node_memblk_s *p, *q, *pend;
494
495 pxm = get_memory_proximity_domain(ma);
496
497 /* fill node memory chunk structure */
498 paddr = ma->base_address;
499 size = ma->length;
500
501 /* Ignore disabled entries */
502 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
503 return;
504
505 /* record this node in proximity bitmap */
506 pxm_bit_set(pxm);
507
508 /* Insertion sort based on base address */
509 pend = &node_memblk[num_node_memblks];
510 for (p = &node_memblk[0]; p < pend; p++) {
511 if (paddr < p->start_paddr)
512 break;
513 }
514 if (p < pend) {
515 for (q = pend - 1; q >= p; q--)
516 *(q + 1) = *q;
517 }
518 p->start_paddr = paddr;
519 p->size = size;
520 p->nid = pxm;
521 num_node_memblks++;
522 }
523
524 void __init acpi_numa_arch_fixup(void)
525 {
526 int i, j, node_from, node_to;
527
528 /* If there's no SRAT, fix the phys_id and mark node 0 online */
529 if (srat_num_cpus == 0) {
530 node_set_online(0);
531 node_cpuid[0].phys_id = hard_smp_processor_id();
532 return;
533 }
534
535 /*
536 * MCD - This can probably be dropped now. No need for pxm ID to node ID
537 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
538 */
539 nodes_clear(node_online_map);
540 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
541 if (pxm_bit_test(i)) {
542 int nid = acpi_map_pxm_to_node(i);
543 node_set_online(nid);
544 }
545 }
546
547 /* set logical node id in memory chunk structure */
548 for (i = 0; i < num_node_memblks; i++)
549 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
550
551 /* assign memory bank numbers for each chunk on each node */
552 for_each_online_node(i) {
553 int bank;
554
555 bank = 0;
556 for (j = 0; j < num_node_memblks; j++)
557 if (node_memblk[j].nid == i)
558 node_memblk[j].bank = bank++;
559 }
560
561 /* set logical node id in cpu structure */
562 for (i = 0; i < srat_num_cpus; i++)
563 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
564
565 printk(KERN_INFO "Number of logical nodes in system = %d\n",
566 num_online_nodes());
567 printk(KERN_INFO "Number of memory chunks in system = %d\n",
568 num_node_memblks);
569
570 if (!slit_table)
571 return;
572 memset(numa_slit, -1, sizeof(numa_slit));
573 for (i = 0; i < slit_table->locality_count; i++) {
574 if (!pxm_bit_test(i))
575 continue;
576 node_from = pxm_to_node(i);
577 for (j = 0; j < slit_table->locality_count; j++) {
578 if (!pxm_bit_test(j))
579 continue;
580 node_to = pxm_to_node(j);
581 node_distance(node_from, node_to) =
582 slit_table->entry[i * slit_table->locality_count + j];
583 }
584 }
585
586 #ifdef SLIT_DEBUG
587 printk("ACPI 2.0 SLIT locality table:\n");
588 for_each_online_node(i) {
589 for_each_online_node(j)
590 printk("%03d ", node_distance(i, j));
591 printk("\n");
592 }
593 #endif
594 }
595 #endif /* CONFIG_ACPI_NUMA */
596
597 /*
598 * success: return IRQ number (>=0)
599 * failure: return < 0
600 */
601 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
602 {
603 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
604 return gsi;
605
606 if (has_8259 && gsi < 16)
607 return isa_irq_to_vector(gsi);
608
609 return iosapic_register_intr(gsi,
610 (polarity ==
611 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
612 IOSAPIC_POL_LOW,
613 (triggering ==
614 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
615 IOSAPIC_LEVEL);
616 }
617
618 EXPORT_SYMBOL(acpi_register_gsi);
619
620 void acpi_unregister_gsi(u32 gsi)
621 {
622 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
623 return;
624
625 iosapic_unregister_intr(gsi);
626 }
627
628 EXPORT_SYMBOL(acpi_unregister_gsi);
629
630 static int __init acpi_parse_fadt(struct acpi_table_header *table)
631 {
632 struct acpi_table_header *fadt_header;
633 struct acpi_table_fadt *fadt;
634
635 if (!table)
636 return -EINVAL;
637
638 fadt_header = (struct acpi_table_header *)table;
639 if (fadt_header->revision != 3)
640 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
641
642 fadt = (struct acpi_table_fadt *)fadt_header;
643
644 acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
645 return 0;
646 }
647
648 int __init acpi_boot_init(void)
649 {
650
651 /*
652 * MADT
653 * ----
654 * Parse the Multiple APIC Description Table (MADT), if exists.
655 * Note that this table provides platform SMP configuration
656 * information -- the successor to MPS tables.
657 */
658
659 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
660 printk(KERN_ERR PREFIX "Can't find MADT\n");
661 goto skip_madt;
662 }
663
664 /* Local APIC */
665
666 if (acpi_table_parse_madt
667 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
668 printk(KERN_ERR PREFIX
669 "Error parsing LAPIC address override entry\n");
670
671 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
672 < 1)
673 printk(KERN_ERR PREFIX
674 "Error parsing MADT - no LAPIC entries\n");
675
676 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
677 < 0)
678 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
679
680 /* I/O APIC */
681
682 if (acpi_table_parse_madt
683 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
684 if (!ia64_platform_is("sn2"))
685 printk(KERN_ERR PREFIX
686 "Error parsing MADT - no IOSAPIC entries\n");
687 }
688
689 /* System-Level Interrupt Routing */
690
691 if (acpi_table_parse_madt
692 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
693 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
694 printk(KERN_ERR PREFIX
695 "Error parsing platform interrupt source entry\n");
696
697 if (acpi_table_parse_madt
698 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
699 printk(KERN_ERR PREFIX
700 "Error parsing interrupt source overrides entry\n");
701
702 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
703 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
704 skip_madt:
705
706 /*
707 * FADT says whether a legacy keyboard controller is present.
708 * The FADT also contains an SCI_INT line, by which the system
709 * gets interrupts such as power and sleep buttons. If it's not
710 * on a Legacy interrupt, it needs to be setup.
711 */
712 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
713 printk(KERN_ERR PREFIX "Can't find FADT\n");
714
715 #ifdef CONFIG_SMP
716 if (available_cpus == 0) {
717 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
718 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
719 smp_boot_data.cpu_phys_id[available_cpus] =
720 hard_smp_processor_id();
721 available_cpus = 1; /* We've got at least one of these, no? */
722 }
723 smp_boot_data.cpu_count = available_cpus;
724
725 smp_build_cpu_map();
726 # ifdef CONFIG_ACPI_NUMA
727 if (srat_num_cpus == 0) {
728 int cpu, i = 1;
729 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
730 if (smp_boot_data.cpu_phys_id[cpu] !=
731 hard_smp_processor_id())
732 node_cpuid[i++].phys_id =
733 smp_boot_data.cpu_phys_id[cpu];
734 }
735 # endif
736 #endif
737 #ifdef CONFIG_ACPI_NUMA
738 build_cpu_to_node_map();
739 #endif
740 /* Make boot-up look pretty */
741 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
742 total_cpus);
743 return 0;
744 }
745
746 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
747 {
748 int tmp;
749
750 if (has_8259 && gsi < 16)
751 *irq = isa_irq_to_vector(gsi);
752 else {
753 tmp = gsi_to_irq(gsi);
754 if (tmp == -1)
755 return -1;
756 *irq = tmp;
757 }
758 return 0;
759 }
760
761 /*
762 * ACPI based hotplug CPU support
763 */
764 #ifdef CONFIG_ACPI_HOTPLUG_CPU
765 static
766 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
767 {
768 #ifdef CONFIG_ACPI_NUMA
769 int pxm_id;
770 int nid;
771
772 pxm_id = acpi_get_pxm(handle);
773 /*
774 * We don't have cpu-only-node hotadd. But if the system equips
775 * SRAT table, pxm is already found and node is ready.
776 * So, just pxm_to_nid(pxm) is OK.
777 * This code here is for the system which doesn't have full SRAT
778 * table for possible cpus.
779 */
780 nid = acpi_map_pxm_to_node(pxm_id);
781 node_cpuid[cpu].phys_id = physid;
782 node_cpuid[cpu].nid = nid;
783 #endif
784 return (0);
785 }
786
787 int additional_cpus __initdata = -1;
788
789 static __init int setup_additional_cpus(char *s)
790 {
791 if (s)
792 additional_cpus = simple_strtol(s, NULL, 0);
793
794 return 0;
795 }
796
797 early_param("additional_cpus", setup_additional_cpus);
798
799 /*
800 * cpu_possible_map should be static, it cannot change as CPUs
801 * are onlined, or offlined. The reason is per-cpu data-structures
802 * are allocated by some modules at init time, and dont expect to
803 * do this dynamically on cpu arrival/departure.
804 * cpu_present_map on the other hand can change dynamically.
805 * In case when cpu_hotplug is not compiled, then we resort to current
806 * behaviour, which is cpu_possible == cpu_present.
807 * - Ashok Raj
808 *
809 * Three ways to find out the number of additional hotplug CPUs:
810 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
811 * - The user can overwrite it with additional_cpus=NUM
812 * - Otherwise don't reserve additional CPUs.
813 */
814 __init void prefill_possible_map(void)
815 {
816 int i;
817 int possible, disabled_cpus;
818
819 disabled_cpus = total_cpus - available_cpus;
820
821 if (additional_cpus == -1) {
822 if (disabled_cpus > 0)
823 additional_cpus = disabled_cpus;
824 else
825 additional_cpus = 0;
826 }
827
828 possible = available_cpus + additional_cpus;
829
830 if (possible > NR_CPUS)
831 possible = NR_CPUS;
832
833 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
834 possible, max((possible - available_cpus), 0));
835
836 for (i = 0; i < possible; i++)
837 cpu_set(i, cpu_possible_map);
838 }
839
840 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
841 {
842 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
843 union acpi_object *obj;
844 struct acpi_madt_local_sapic *lsapic;
845 cpumask_t tmp_map;
846 long physid;
847 int cpu;
848
849 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
850 return -EINVAL;
851
852 if (!buffer.length || !buffer.pointer)
853 return -EINVAL;
854
855 obj = buffer.pointer;
856 if (obj->type != ACPI_TYPE_BUFFER)
857 {
858 kfree(buffer.pointer);
859 return -EINVAL;
860 }
861
862 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
863
864 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
865 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
866 kfree(buffer.pointer);
867 return -EINVAL;
868 }
869
870 physid = ((lsapic->id << 8) | (lsapic->eid));
871
872 kfree(buffer.pointer);
873 buffer.length = ACPI_ALLOCATE_BUFFER;
874 buffer.pointer = NULL;
875
876 cpus_complement(tmp_map, cpu_present_map);
877 cpu = first_cpu(tmp_map);
878 if (cpu >= NR_CPUS)
879 return -EINVAL;
880
881 acpi_map_cpu2node(handle, cpu, physid);
882
883 cpu_set(cpu, cpu_present_map);
884 ia64_cpu_to_sapicid[cpu] = physid;
885
886 *pcpu = cpu;
887 return (0);
888 }
889
890 EXPORT_SYMBOL(acpi_map_lsapic);
891
892 int acpi_unmap_lsapic(int cpu)
893 {
894 ia64_cpu_to_sapicid[cpu] = -1;
895 cpu_clear(cpu, cpu_present_map);
896
897 #ifdef CONFIG_ACPI_NUMA
898 /* NUMA specific cleanup's */
899 #endif
900
901 return (0);
902 }
903
904 EXPORT_SYMBOL(acpi_unmap_lsapic);
905 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
906
907 #ifdef CONFIG_ACPI_NUMA
908 static acpi_status __devinit
909 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
910 {
911 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
912 union acpi_object *obj;
913 struct acpi_madt_io_sapic *iosapic;
914 unsigned int gsi_base;
915 int pxm, node;
916
917 /* Only care about objects w/ a method that returns the MADT */
918 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
919 return AE_OK;
920
921 if (!buffer.length || !buffer.pointer)
922 return AE_OK;
923
924 obj = buffer.pointer;
925 if (obj->type != ACPI_TYPE_BUFFER ||
926 obj->buffer.length < sizeof(*iosapic)) {
927 kfree(buffer.pointer);
928 return AE_OK;
929 }
930
931 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
932
933 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
934 kfree(buffer.pointer);
935 return AE_OK;
936 }
937
938 gsi_base = iosapic->global_irq_base;
939
940 kfree(buffer.pointer);
941
942 /*
943 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
944 * us which node to associate this with.
945 */
946 pxm = acpi_get_pxm(handle);
947 if (pxm < 0)
948 return AE_OK;
949
950 node = pxm_to_node(pxm);
951
952 if (node >= MAX_NUMNODES || !node_online(node) ||
953 cpus_empty(node_to_cpumask(node)))
954 return AE_OK;
955
956 /* We know a gsi to node mapping! */
957 map_iosapic_to_node(gsi_base, node);
958 return AE_OK;
959 }
960
961 static int __init
962 acpi_map_iosapics (void)
963 {
964 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
965 return 0;
966 }
967
968 fs_initcall(acpi_map_iosapics);
969 #endif /* CONFIG_ACPI_NUMA */
970
971 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
972 {
973 int err;
974
975 if ((err = iosapic_init(phys_addr, gsi_base)))
976 return err;
977
978 #ifdef CONFIG_ACPI_NUMA
979 acpi_map_iosapic(handle, 0, NULL, NULL);
980 #endif /* CONFIG_ACPI_NUMA */
981
982 return 0;
983 }
984
985 EXPORT_SYMBOL(acpi_register_ioapic);
986
987 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
988 {
989 return iosapic_remove(gsi_base);
990 }
991
992 EXPORT_SYMBOL(acpi_unregister_ioapic);
993
994 /*
995 * acpi_save_state_mem() - save kernel state
996 *
997 * TBD when when IA64 starts to support suspend...
998 */
999 int acpi_save_state_mem(void) { return 0; }
1000
1001 /*
1002 * acpi_restore_state()
1003 */
1004 void acpi_restore_state_mem(void) {}
1005
1006 /*
1007 * do_suspend_lowlevel()
1008 */
1009 void do_suspend_lowlevel(void) {}
1010
1011 #endif /* CONFIG_ACPI */
kernel source for telekom puls (alcatel/mediatek)