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Merge branch 'suspend' 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 #include <asm/xen/hypervisor.h>
56
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61 #define PREFIX "ACPI: "
62
63 void (*pm_idle) (void);
64 EXPORT_SYMBOL(pm_idle);
65 void (*pm_power_off) (void);
66 EXPORT_SYMBOL(pm_power_off);
67
68 u32 acpi_rsdt_forced;
69 unsigned int acpi_cpei_override;
70 unsigned int acpi_cpei_phys_cpuid;
71
72 unsigned long acpi_wakeup_address = 0;
73
74 #ifdef CONFIG_IA64_GENERIC
75 static unsigned long __init acpi_find_rsdp(void)
76 {
77 unsigned long rsdp_phys = 0;
78
79 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
80 rsdp_phys = efi.acpi20;
81 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
82 printk(KERN_WARNING PREFIX
83 "v1.0/r0.71 tables no longer supported\n");
84 return rsdp_phys;
85 }
86 #endif
87
88 const char __init *
89 acpi_get_sysname(void)
90 {
91 #ifdef CONFIG_IA64_GENERIC
92 unsigned long rsdp_phys;
93 struct acpi_table_rsdp *rsdp;
94 struct acpi_table_xsdt *xsdt;
95 struct acpi_table_header *hdr;
96 #ifdef CONFIG_DMAR
97 u64 i, nentries;
98 #endif
99
100 rsdp_phys = acpi_find_rsdp();
101 if (!rsdp_phys) {
102 printk(KERN_ERR
103 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
104 return "dig";
105 }
106
107 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
108 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
109 printk(KERN_ERR
110 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
111 return "dig";
112 }
113
114 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
115 hdr = &xsdt->header;
116 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
117 printk(KERN_ERR
118 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
119 return "dig";
120 }
121
122 if (!strcmp(hdr->oem_id, "HP")) {
123 return "hpzx1";
124 } else if (!strcmp(hdr->oem_id, "SGI")) {
125 if (!strcmp(hdr->oem_table_id + 4, "UV"))
126 return "uv";
127 else
128 return "sn2";
129 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
130 return "xen";
131 }
132
133 #ifdef CONFIG_DMAR
134 /* Look for Intel IOMMU */
135 nentries = (hdr->length - sizeof(*hdr)) /
136 sizeof(xsdt->table_offset_entry[0]);
137 for (i = 0; i < nentries; i++) {
138 hdr = __va(xsdt->table_offset_entry[i]);
139 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
140 sizeof(ACPI_SIG_DMAR) - 1) == 0)
141 return "dig_vtd";
142 }
143 #endif
144
145 return "dig";
146 #else
147 # if defined (CONFIG_IA64_HP_SIM)
148 return "hpsim";
149 # elif defined (CONFIG_IA64_HP_ZX1)
150 return "hpzx1";
151 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
152 return "hpzx1_swiotlb";
153 # elif defined (CONFIG_IA64_SGI_SN2)
154 return "sn2";
155 # elif defined (CONFIG_IA64_SGI_UV)
156 return "uv";
157 # elif defined (CONFIG_IA64_DIG)
158 return "dig";
159 # elif defined (CONFIG_IA64_XEN_GUEST)
160 return "xen";
161 # elif defined(CONFIG_IA64_DIG_VTD)
162 return "dig_vtd";
163 # else
164 # error Unknown platform. Fix acpi.c.
165 # endif
166 #endif
167 }
168
169 #ifdef CONFIG_ACPI
170
171 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
172
173 /* Array to record platform interrupt vectors for generic interrupt routing. */
174 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
175 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
176 };
177
178 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
179
180 /*
181 * Interrupt routing API for device drivers. Provides interrupt vector for
182 * a generic platform event. Currently only CPEI is implemented.
183 */
184 int acpi_request_vector(u32 int_type)
185 {
186 int vector = -1;
187
188 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
189 /* corrected platform error interrupt */
190 vector = platform_intr_list[int_type];
191 } else
192 printk(KERN_ERR
193 "acpi_request_vector(): invalid interrupt type\n");
194 return vector;
195 }
196
197 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
198 {
199 return __va(phys_addr);
200 }
201
202 /* --------------------------------------------------------------------------
203 Boot-time Table Parsing
204 -------------------------------------------------------------------------- */
205
206 static int total_cpus __initdata;
207 static int available_cpus __initdata;
208 struct acpi_table_madt *acpi_madt __initdata;
209 static u8 has_8259;
210
211 static int __init
212 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
213 const unsigned long end)
214 {
215 struct acpi_madt_local_apic_override *lapic;
216
217 lapic = (struct acpi_madt_local_apic_override *)header;
218
219 if (BAD_MADT_ENTRY(lapic, end))
220 return -EINVAL;
221
222 if (lapic->address) {
223 iounmap(ipi_base_addr);
224 ipi_base_addr = ioremap(lapic->address, 0);
225 }
226 return 0;
227 }
228
229 static int __init
230 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
231 {
232 struct acpi_madt_local_sapic *lsapic;
233
234 lsapic = (struct acpi_madt_local_sapic *)header;
235
236 /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
237
238 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
239 #ifdef CONFIG_SMP
240 smp_boot_data.cpu_phys_id[available_cpus] =
241 (lsapic->id << 8) | lsapic->eid;
242 #endif
243 ++available_cpus;
244 }
245
246 total_cpus++;
247 return 0;
248 }
249
250 static int __init
251 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
252 {
253 struct acpi_madt_local_apic_nmi *lacpi_nmi;
254
255 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
256
257 if (BAD_MADT_ENTRY(lacpi_nmi, end))
258 return -EINVAL;
259
260 /* TBD: Support lapic_nmi entries */
261 return 0;
262 }
263
264 static int __init
265 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
266 {
267 struct acpi_madt_io_sapic *iosapic;
268
269 iosapic = (struct acpi_madt_io_sapic *)header;
270
271 if (BAD_MADT_ENTRY(iosapic, end))
272 return -EINVAL;
273
274 return iosapic_init(iosapic->address, iosapic->global_irq_base);
275 }
276
277 static unsigned int __initdata acpi_madt_rev;
278
279 static int __init
280 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
281 const unsigned long end)
282 {
283 struct acpi_madt_interrupt_source *plintsrc;
284 int vector;
285
286 plintsrc = (struct acpi_madt_interrupt_source *)header;
287
288 if (BAD_MADT_ENTRY(plintsrc, end))
289 return -EINVAL;
290
291 /*
292 * Get vector assignment for this interrupt, set attributes,
293 * and program the IOSAPIC routing table.
294 */
295 vector = iosapic_register_platform_intr(plintsrc->type,
296 plintsrc->global_irq,
297 plintsrc->io_sapic_vector,
298 plintsrc->eid,
299 plintsrc->id,
300 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
301 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
302 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
303 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
304 ACPI_MADT_TRIGGER_EDGE) ?
305 IOSAPIC_EDGE : IOSAPIC_LEVEL);
306
307 platform_intr_list[plintsrc->type] = vector;
308 if (acpi_madt_rev > 1) {
309 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
310 }
311
312 /*
313 * Save the physical id, so we can check when its being removed
314 */
315 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
316
317 return 0;
318 }
319
320 #ifdef CONFIG_HOTPLUG_CPU
321 unsigned int can_cpei_retarget(void)
322 {
323 extern int cpe_vector;
324 extern unsigned int force_cpei_retarget;
325
326 /*
327 * Only if CPEI is supported and the override flag
328 * is present, otherwise return that its re-targettable
329 * if we are in polling mode.
330 */
331 if (cpe_vector > 0) {
332 if (acpi_cpei_override || force_cpei_retarget)
333 return 1;
334 else
335 return 0;
336 }
337 return 1;
338 }
339
340 unsigned int is_cpu_cpei_target(unsigned int cpu)
341 {
342 unsigned int logical_id;
343
344 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
345
346 if (logical_id == cpu)
347 return 1;
348 else
349 return 0;
350 }
351
352 void set_cpei_target_cpu(unsigned int cpu)
353 {
354 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
355 }
356 #endif
357
358 unsigned int get_cpei_target_cpu(void)
359 {
360 return acpi_cpei_phys_cpuid;
361 }
362
363 static int __init
364 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
365 const unsigned long end)
366 {
367 struct acpi_madt_interrupt_override *p;
368
369 p = (struct acpi_madt_interrupt_override *)header;
370
371 if (BAD_MADT_ENTRY(p, end))
372 return -EINVAL;
373
374 iosapic_override_isa_irq(p->source_irq, p->global_irq,
375 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
376 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
377 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
378 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
379 ACPI_MADT_TRIGGER_EDGE) ?
380 IOSAPIC_EDGE : IOSAPIC_LEVEL);
381 return 0;
382 }
383
384 static int __init
385 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
386 {
387 struct acpi_madt_nmi_source *nmi_src;
388
389 nmi_src = (struct acpi_madt_nmi_source *)header;
390
391 if (BAD_MADT_ENTRY(nmi_src, end))
392 return -EINVAL;
393
394 /* TBD: Support nimsrc entries */
395 return 0;
396 }
397
398 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
399 {
400 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
401
402 /*
403 * Unfortunately ITC_DRIFT is not yet part of the
404 * official SAL spec, so the ITC_DRIFT bit is not
405 * set by the BIOS on this hardware.
406 */
407 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
408
409 cyclone_setup();
410 }
411 }
412
413 static int __init acpi_parse_madt(struct acpi_table_header *table)
414 {
415 if (!table)
416 return -EINVAL;
417
418 acpi_madt = (struct acpi_table_madt *)table;
419
420 acpi_madt_rev = acpi_madt->header.revision;
421
422 /* remember the value for reference after free_initmem() */
423 #ifdef CONFIG_ITANIUM
424 has_8259 = 1; /* Firmware on old Itanium systems is broken */
425 #else
426 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
427 #endif
428 iosapic_system_init(has_8259);
429
430 /* Get base address of IPI Message Block */
431
432 if (acpi_madt->address)
433 ipi_base_addr = ioremap(acpi_madt->address, 0);
434
435 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
436
437 acpi_madt_oem_check(acpi_madt->header.oem_id,
438 acpi_madt->header.oem_table_id);
439
440 return 0;
441 }
442
443 #ifdef CONFIG_ACPI_NUMA
444
445 #undef SLIT_DEBUG
446
447 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
448
449 static int __initdata srat_num_cpus; /* number of cpus */
450 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
451 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
452 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
453 static struct acpi_table_slit __initdata *slit_table;
454 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
455
456 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
457 {
458 int pxm;
459
460 pxm = pa->proximity_domain_lo;
461 if (ia64_platform_is("sn2"))
462 pxm += pa->proximity_domain_hi[0] << 8;
463 return pxm;
464 }
465
466 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
467 {
468 int pxm;
469
470 pxm = ma->proximity_domain;
471 if (!ia64_platform_is("sn2"))
472 pxm &= 0xff;
473
474 return pxm;
475 }
476
477 /*
478 * ACPI 2.0 SLIT (System Locality Information Table)
479 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
480 */
481 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
482 {
483 u32 len;
484
485 len = sizeof(struct acpi_table_header) + 8
486 + slit->locality_count * slit->locality_count;
487 if (slit->header.length != len) {
488 printk(KERN_ERR
489 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
490 len, slit->header.length);
491 return;
492 }
493 slit_table = slit;
494 }
495
496 void __init
497 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
498 {
499 int pxm;
500
501 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
502 return;
503
504 pxm = get_processor_proximity_domain(pa);
505
506 /* record this node in proximity bitmap */
507 pxm_bit_set(pxm);
508
509 node_cpuid[srat_num_cpus].phys_id =
510 (pa->apic_id << 8) | (pa->local_sapic_eid);
511 /* nid should be overridden as logical node id later */
512 node_cpuid[srat_num_cpus].nid = pxm;
513 cpu_set(srat_num_cpus, early_cpu_possible_map);
514 srat_num_cpus++;
515 }
516
517 void __init
518 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
519 {
520 unsigned long paddr, size;
521 int pxm;
522 struct node_memblk_s *p, *q, *pend;
523
524 pxm = get_memory_proximity_domain(ma);
525
526 /* fill node memory chunk structure */
527 paddr = ma->base_address;
528 size = ma->length;
529
530 /* Ignore disabled entries */
531 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
532 return;
533
534 /* record this node in proximity bitmap */
535 pxm_bit_set(pxm);
536
537 /* Insertion sort based on base address */
538 pend = &node_memblk[num_node_memblks];
539 for (p = &node_memblk[0]; p < pend; p++) {
540 if (paddr < p->start_paddr)
541 break;
542 }
543 if (p < pend) {
544 for (q = pend - 1; q >= p; q--)
545 *(q + 1) = *q;
546 }
547 p->start_paddr = paddr;
548 p->size = size;
549 p->nid = pxm;
550 num_node_memblks++;
551 }
552
553 void __init acpi_numa_arch_fixup(void)
554 {
555 int i, j, node_from, node_to;
556
557 /* If there's no SRAT, fix the phys_id and mark node 0 online */
558 if (srat_num_cpus == 0) {
559 node_set_online(0);
560 node_cpuid[0].phys_id = hard_smp_processor_id();
561 return;
562 }
563
564 /*
565 * MCD - This can probably be dropped now. No need for pxm ID to node ID
566 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
567 */
568 nodes_clear(node_online_map);
569 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
570 if (pxm_bit_test(i)) {
571 int nid = acpi_map_pxm_to_node(i);
572 node_set_online(nid);
573 }
574 }
575
576 /* set logical node id in memory chunk structure */
577 for (i = 0; i < num_node_memblks; i++)
578 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
579
580 /* assign memory bank numbers for each chunk on each node */
581 for_each_online_node(i) {
582 int bank;
583
584 bank = 0;
585 for (j = 0; j < num_node_memblks; j++)
586 if (node_memblk[j].nid == i)
587 node_memblk[j].bank = bank++;
588 }
589
590 /* set logical node id in cpu structure */
591 for_each_possible_early_cpu(i)
592 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
593
594 printk(KERN_INFO "Number of logical nodes in system = %d\n",
595 num_online_nodes());
596 printk(KERN_INFO "Number of memory chunks in system = %d\n",
597 num_node_memblks);
598
599 if (!slit_table) {
600 for (i = 0; i < MAX_NUMNODES; i++)
601 for (j = 0; j < MAX_NUMNODES; j++)
602 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
603 REMOTE_DISTANCE;
604 return;
605 }
606
607 memset(numa_slit, -1, sizeof(numa_slit));
608 for (i = 0; i < slit_table->locality_count; i++) {
609 if (!pxm_bit_test(i))
610 continue;
611 node_from = pxm_to_node(i);
612 for (j = 0; j < slit_table->locality_count; j++) {
613 if (!pxm_bit_test(j))
614 continue;
615 node_to = pxm_to_node(j);
616 node_distance(node_from, node_to) =
617 slit_table->entry[i * slit_table->locality_count + j];
618 }
619 }
620
621 #ifdef SLIT_DEBUG
622 printk("ACPI 2.0 SLIT locality table:\n");
623 for_each_online_node(i) {
624 for_each_online_node(j)
625 printk("%03d ", node_distance(i, j));
626 printk("\n");
627 }
628 #endif
629 }
630 #endif /* CONFIG_ACPI_NUMA */
631
632 /*
633 * success: return IRQ number (>=0)
634 * failure: return < 0
635 */
636 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
637 {
638 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
639 return gsi;
640
641 if (has_8259 && gsi < 16)
642 return isa_irq_to_vector(gsi);
643
644 return iosapic_register_intr(gsi,
645 (polarity ==
646 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
647 IOSAPIC_POL_LOW,
648 (triggering ==
649 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
650 IOSAPIC_LEVEL);
651 }
652
653 void acpi_unregister_gsi(u32 gsi)
654 {
655 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
656 return;
657
658 if (has_8259 && gsi < 16)
659 return;
660
661 iosapic_unregister_intr(gsi);
662 }
663
664 static int __init acpi_parse_fadt(struct acpi_table_header *table)
665 {
666 struct acpi_table_header *fadt_header;
667 struct acpi_table_fadt *fadt;
668
669 if (!table)
670 return -EINVAL;
671
672 fadt_header = (struct acpi_table_header *)table;
673 if (fadt_header->revision != 3)
674 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
675
676 fadt = (struct acpi_table_fadt *)fadt_header;
677
678 acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
679 return 0;
680 }
681
682 int __init early_acpi_boot_init(void)
683 {
684 int ret;
685
686 /*
687 * do a partial walk of MADT to determine how many CPUs
688 * we have including offline CPUs
689 */
690 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
691 printk(KERN_ERR PREFIX "Can't find MADT\n");
692 return 0;
693 }
694
695 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
696 acpi_parse_lsapic, NR_CPUS);
697 if (ret < 1)
698 printk(KERN_ERR PREFIX
699 "Error parsing MADT - no LAPIC entries\n");
700
701 return 0;
702 }
703
704
705
706 int __init acpi_boot_init(void)
707 {
708
709 /*
710 * MADT
711 * ----
712 * Parse the Multiple APIC Description Table (MADT), if exists.
713 * Note that this table provides platform SMP configuration
714 * information -- the successor to MPS tables.
715 */
716
717 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
718 printk(KERN_ERR PREFIX "Can't find MADT\n");
719 goto skip_madt;
720 }
721
722 /* Local APIC */
723
724 if (acpi_table_parse_madt
725 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
726 printk(KERN_ERR PREFIX
727 "Error parsing LAPIC address override entry\n");
728
729 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
730 < 0)
731 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
732
733 /* I/O APIC */
734
735 if (acpi_table_parse_madt
736 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
737 if (!ia64_platform_is("sn2"))
738 printk(KERN_ERR PREFIX
739 "Error parsing MADT - no IOSAPIC entries\n");
740 }
741
742 /* System-Level Interrupt Routing */
743
744 if (acpi_table_parse_madt
745 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
746 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
747 printk(KERN_ERR PREFIX
748 "Error parsing platform interrupt source entry\n");
749
750 if (acpi_table_parse_madt
751 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
752 printk(KERN_ERR PREFIX
753 "Error parsing interrupt source overrides entry\n");
754
755 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
756 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
757 skip_madt:
758
759 /*
760 * FADT says whether a legacy keyboard controller is present.
761 * The FADT also contains an SCI_INT line, by which the system
762 * gets interrupts such as power and sleep buttons. If it's not
763 * on a Legacy interrupt, it needs to be setup.
764 */
765 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
766 printk(KERN_ERR PREFIX "Can't find FADT\n");
767
768 #ifdef CONFIG_SMP
769 if (available_cpus == 0) {
770 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
771 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
772 smp_boot_data.cpu_phys_id[available_cpus] =
773 hard_smp_processor_id();
774 available_cpus = 1; /* We've got at least one of these, no? */
775 }
776 smp_boot_data.cpu_count = available_cpus;
777
778 smp_build_cpu_map();
779 # ifdef CONFIG_ACPI_NUMA
780 if (srat_num_cpus == 0) {
781 int cpu, i = 1;
782 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
783 if (smp_boot_data.cpu_phys_id[cpu] !=
784 hard_smp_processor_id())
785 node_cpuid[i++].phys_id =
786 smp_boot_data.cpu_phys_id[cpu];
787 }
788 # endif
789 #endif
790 #ifdef CONFIG_ACPI_NUMA
791 build_cpu_to_node_map();
792 #endif
793 /* Make boot-up look pretty */
794 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
795 total_cpus);
796 return 0;
797 }
798
799 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
800 {
801 int tmp;
802
803 if (has_8259 && gsi < 16)
804 *irq = isa_irq_to_vector(gsi);
805 else {
806 tmp = gsi_to_irq(gsi);
807 if (tmp == -1)
808 return -1;
809 *irq = tmp;
810 }
811 return 0;
812 }
813
814 /*
815 * ACPI based hotplug CPU support
816 */
817 #ifdef CONFIG_ACPI_HOTPLUG_CPU
818 static
819 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
820 {
821 #ifdef CONFIG_ACPI_NUMA
822 int pxm_id;
823 int nid;
824
825 pxm_id = acpi_get_pxm(handle);
826 /*
827 * We don't have cpu-only-node hotadd. But if the system equips
828 * SRAT table, pxm is already found and node is ready.
829 * So, just pxm_to_nid(pxm) is OK.
830 * This code here is for the system which doesn't have full SRAT
831 * table for possible cpus.
832 */
833 nid = acpi_map_pxm_to_node(pxm_id);
834 node_cpuid[cpu].phys_id = physid;
835 node_cpuid[cpu].nid = nid;
836 #endif
837 return (0);
838 }
839
840 int additional_cpus __initdata = -1;
841
842 static __init int setup_additional_cpus(char *s)
843 {
844 if (s)
845 additional_cpus = simple_strtol(s, NULL, 0);
846
847 return 0;
848 }
849
850 early_param("additional_cpus", setup_additional_cpus);
851
852 /*
853 * cpu_possible_map should be static, it cannot change as CPUs
854 * are onlined, or offlined. The reason is per-cpu data-structures
855 * are allocated by some modules at init time, and dont expect to
856 * do this dynamically on cpu arrival/departure.
857 * cpu_present_map on the other hand can change dynamically.
858 * In case when cpu_hotplug is not compiled, then we resort to current
859 * behaviour, which is cpu_possible == cpu_present.
860 * - Ashok Raj
861 *
862 * Three ways to find out the number of additional hotplug CPUs:
863 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
864 * - The user can overwrite it with additional_cpus=NUM
865 * - Otherwise don't reserve additional CPUs.
866 */
867 __init void prefill_possible_map(void)
868 {
869 int i;
870 int possible, disabled_cpus;
871
872 disabled_cpus = total_cpus - available_cpus;
873
874 if (additional_cpus == -1) {
875 if (disabled_cpus > 0)
876 additional_cpus = disabled_cpus;
877 else
878 additional_cpus = 0;
879 }
880
881 possible = available_cpus + additional_cpus;
882
883 if (possible > NR_CPUS)
884 possible = NR_CPUS;
885
886 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
887 possible, max((possible - available_cpus), 0));
888
889 for (i = 0; i < possible; i++)
890 cpu_set(i, cpu_possible_map);
891 }
892
893 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
894 {
895 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
896 union acpi_object *obj;
897 struct acpi_madt_local_sapic *lsapic;
898 cpumask_t tmp_map;
899 int cpu, physid;
900
901 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
902 return -EINVAL;
903
904 if (!buffer.length || !buffer.pointer)
905 return -EINVAL;
906
907 obj = buffer.pointer;
908 if (obj->type != ACPI_TYPE_BUFFER)
909 {
910 kfree(buffer.pointer);
911 return -EINVAL;
912 }
913
914 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
915
916 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
917 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
918 kfree(buffer.pointer);
919 return -EINVAL;
920 }
921
922 physid = ((lsapic->id << 8) | (lsapic->eid));
923
924 kfree(buffer.pointer);
925 buffer.length = ACPI_ALLOCATE_BUFFER;
926 buffer.pointer = NULL;
927
928 cpus_complement(tmp_map, cpu_present_map);
929 cpu = first_cpu(tmp_map);
930 if (cpu >= NR_CPUS)
931 return -EINVAL;
932
933 acpi_map_cpu2node(handle, cpu, physid);
934
935 cpu_set(cpu, cpu_present_map);
936 ia64_cpu_to_sapicid[cpu] = physid;
937
938 *pcpu = cpu;
939 return (0);
940 }
941
942 EXPORT_SYMBOL(acpi_map_lsapic);
943
944 int acpi_unmap_lsapic(int cpu)
945 {
946 ia64_cpu_to_sapicid[cpu] = -1;
947 cpu_clear(cpu, cpu_present_map);
948
949 #ifdef CONFIG_ACPI_NUMA
950 /* NUMA specific cleanup's */
951 #endif
952
953 return (0);
954 }
955
956 EXPORT_SYMBOL(acpi_unmap_lsapic);
957 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
958
959 #ifdef CONFIG_ACPI_NUMA
960 static acpi_status __devinit
961 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
962 {
963 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
964 union acpi_object *obj;
965 struct acpi_madt_io_sapic *iosapic;
966 unsigned int gsi_base;
967 int pxm, node;
968
969 /* Only care about objects w/ a method that returns the MADT */
970 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
971 return AE_OK;
972
973 if (!buffer.length || !buffer.pointer)
974 return AE_OK;
975
976 obj = buffer.pointer;
977 if (obj->type != ACPI_TYPE_BUFFER ||
978 obj->buffer.length < sizeof(*iosapic)) {
979 kfree(buffer.pointer);
980 return AE_OK;
981 }
982
983 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
984
985 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
986 kfree(buffer.pointer);
987 return AE_OK;
988 }
989
990 gsi_base = iosapic->global_irq_base;
991
992 kfree(buffer.pointer);
993
994 /*
995 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
996 * us which node to associate this with.
997 */
998 pxm = acpi_get_pxm(handle);
999 if (pxm < 0)
1000 return AE_OK;
1001
1002 node = pxm_to_node(pxm);
1003
1004 if (node >= MAX_NUMNODES || !node_online(node) ||
1005 cpus_empty(node_to_cpumask(node)))
1006 return AE_OK;
1007
1008 /* We know a gsi to node mapping! */
1009 map_iosapic_to_node(gsi_base, node);
1010 return AE_OK;
1011 }
1012
1013 static int __init
1014 acpi_map_iosapics (void)
1015 {
1016 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1017 return 0;
1018 }
1019
1020 fs_initcall(acpi_map_iosapics);
1021 #endif /* CONFIG_ACPI_NUMA */
1022
1023 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1024 {
1025 int err;
1026
1027 if ((err = iosapic_init(phys_addr, gsi_base)))
1028 return err;
1029
1030 #ifdef CONFIG_ACPI_NUMA
1031 acpi_map_iosapic(handle, 0, NULL, NULL);
1032 #endif /* CONFIG_ACPI_NUMA */
1033
1034 return 0;
1035 }
1036
1037 EXPORT_SYMBOL(acpi_register_ioapic);
1038
1039 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1040 {
1041 return iosapic_remove(gsi_base);
1042 }
1043
1044 EXPORT_SYMBOL(acpi_unregister_ioapic);
1045
1046 /*
1047 * acpi_save_state_mem() - save kernel state
1048 *
1049 * TBD when when IA64 starts to support suspend...
1050 */
1051 int acpi_save_state_mem(void) { return 0; }
1052
1053 /*
1054 * acpi_restore_state()
1055 */
1056 void acpi_restore_state_mem(void) {}
1057
1058 /*
1059 * do_suspend_lowlevel()
1060 */
1061 void do_suspend_lowlevel(void) {}
1062
1063 #endif /* CONFIG_ACPI */
kernel source for telekom puls (alcatel/mediatek)