[IA64] acpi_get_sysname() should be __init
[linux-3.10.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 const char __init *
71 acpi_get_sysname(void)
72 {
73 #ifdef CONFIG_IA64_GENERIC
74         unsigned long rsdp_phys;
75         struct acpi_table_rsdp *rsdp;
76         struct acpi_table_xsdt *xsdt;
77         struct acpi_table_header *hdr;
78
79         rsdp_phys = acpi_find_rsdp();
80         if (!rsdp_phys) {
81                 printk(KERN_ERR
82                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
83                 return "dig";
84         }
85
86         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
87         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
88                 printk(KERN_ERR
89                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
90                 return "dig";
91         }
92
93         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
94         hdr = &xsdt->header;
95         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
96                 printk(KERN_ERR
97                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
98                 return "dig";
99         }
100
101         if (!strcmp(hdr->oem_id, "HP")) {
102                 return "hpzx1";
103         } else if (!strcmp(hdr->oem_id, "SGI")) {
104                 return "sn2";
105         }
106
107         return "dig";
108 #else
109 # if defined (CONFIG_IA64_HP_SIM)
110         return "hpsim";
111 # elif defined (CONFIG_IA64_HP_ZX1)
112         return "hpzx1";
113 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
114         return "hpzx1_swiotlb";
115 # elif defined (CONFIG_IA64_SGI_SN2)
116         return "sn2";
117 # elif defined (CONFIG_IA64_DIG)
118         return "dig";
119 # else
120 #       error Unknown platform.  Fix acpi.c.
121 # endif
122 #endif
123 }
124
125 #ifdef CONFIG_ACPI
126
127 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
128
129 /* Array to record platform interrupt vectors for generic interrupt routing. */
130 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
131         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
132 };
133
134 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
135
136 /*
137  * Interrupt routing API for device drivers.  Provides interrupt vector for
138  * a generic platform event.  Currently only CPEI is implemented.
139  */
140 int acpi_request_vector(u32 int_type)
141 {
142         int vector = -1;
143
144         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
145                 /* corrected platform error interrupt */
146                 vector = platform_intr_list[int_type];
147         } else
148                 printk(KERN_ERR
149                        "acpi_request_vector(): invalid interrupt type\n");
150         return vector;
151 }
152
153 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
154 {
155         return __va(phys_addr);
156 }
157
158 /* --------------------------------------------------------------------------
159                             Boot-time Table Parsing
160    -------------------------------------------------------------------------- */
161
162 static int total_cpus __initdata;
163 static int available_cpus __initdata;
164 struct acpi_table_madt *acpi_madt __initdata;
165 static u8 has_8259;
166
167 static int __init
168 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
169                           const unsigned long end)
170 {
171         struct acpi_madt_local_apic_override *lapic;
172
173         lapic = (struct acpi_madt_local_apic_override *)header;
174
175         if (BAD_MADT_ENTRY(lapic, end))
176                 return -EINVAL;
177
178         if (lapic->address) {
179                 iounmap(ipi_base_addr);
180                 ipi_base_addr = ioremap(lapic->address, 0);
181         }
182         return 0;
183 }
184
185 static int __init
186 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
187 {
188         struct acpi_madt_local_sapic *lsapic;
189
190         lsapic = (struct acpi_madt_local_sapic *)header;
191
192         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
193
194         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
195 #ifdef CONFIG_SMP
196                 smp_boot_data.cpu_phys_id[available_cpus] =
197                     (lsapic->id << 8) | lsapic->eid;
198 #endif
199                 ++available_cpus;
200         }
201
202         total_cpus++;
203         return 0;
204 }
205
206 static int __init
207 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
208 {
209         struct acpi_madt_local_apic_nmi *lacpi_nmi;
210
211         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
212
213         if (BAD_MADT_ENTRY(lacpi_nmi, end))
214                 return -EINVAL;
215
216         /* TBD: Support lapic_nmi entries */
217         return 0;
218 }
219
220 static int __init
221 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
222 {
223         struct acpi_madt_io_sapic *iosapic;
224
225         iosapic = (struct acpi_madt_io_sapic *)header;
226
227         if (BAD_MADT_ENTRY(iosapic, end))
228                 return -EINVAL;
229
230         return iosapic_init(iosapic->address, iosapic->global_irq_base);
231 }
232
233 static unsigned int __initdata acpi_madt_rev;
234
235 static int __init
236 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
237                         const unsigned long end)
238 {
239         struct acpi_madt_interrupt_source *plintsrc;
240         int vector;
241
242         plintsrc = (struct acpi_madt_interrupt_source *)header;
243
244         if (BAD_MADT_ENTRY(plintsrc, end))
245                 return -EINVAL;
246
247         /*
248          * Get vector assignment for this interrupt, set attributes,
249          * and program the IOSAPIC routing table.
250          */
251         vector = iosapic_register_platform_intr(plintsrc->type,
252                                                 plintsrc->global_irq,
253                                                 plintsrc->io_sapic_vector,
254                                                 plintsrc->eid,
255                                                 plintsrc->id,
256                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
257                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
258                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
259                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
260                                                  ACPI_MADT_TRIGGER_EDGE) ?
261                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
262
263         platform_intr_list[plintsrc->type] = vector;
264         if (acpi_madt_rev > 1) {
265                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
266         }
267
268         /*
269          * Save the physical id, so we can check when its being removed
270          */
271         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
272
273         return 0;
274 }
275
276 #ifdef CONFIG_HOTPLUG_CPU
277 unsigned int can_cpei_retarget(void)
278 {
279         extern int cpe_vector;
280         extern unsigned int force_cpei_retarget;
281
282         /*
283          * Only if CPEI is supported and the override flag
284          * is present, otherwise return that its re-targettable
285          * if we are in polling mode.
286          */
287         if (cpe_vector > 0) {
288                 if (acpi_cpei_override || force_cpei_retarget)
289                         return 1;
290                 else
291                         return 0;
292         }
293         return 1;
294 }
295
296 unsigned int is_cpu_cpei_target(unsigned int cpu)
297 {
298         unsigned int logical_id;
299
300         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
301
302         if (logical_id == cpu)
303                 return 1;
304         else
305                 return 0;
306 }
307
308 void set_cpei_target_cpu(unsigned int cpu)
309 {
310         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
311 }
312 #endif
313
314 unsigned int get_cpei_target_cpu(void)
315 {
316         return acpi_cpei_phys_cpuid;
317 }
318
319 static int __init
320 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
321                        const unsigned long end)
322 {
323         struct acpi_madt_interrupt_override *p;
324
325         p = (struct acpi_madt_interrupt_override *)header;
326
327         if (BAD_MADT_ENTRY(p, end))
328                 return -EINVAL;
329
330         iosapic_override_isa_irq(p->source_irq, p->global_irq,
331                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
332                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
333                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
334                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
335                                  ACPI_MADT_TRIGGER_EDGE) ?
336                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
337         return 0;
338 }
339
340 static int __init
341 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
342 {
343         struct acpi_madt_nmi_source *nmi_src;
344
345         nmi_src = (struct acpi_madt_nmi_source *)header;
346
347         if (BAD_MADT_ENTRY(nmi_src, end))
348                 return -EINVAL;
349
350         /* TBD: Support nimsrc entries */
351         return 0;
352 }
353
354 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
355 {
356         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
357
358                 /*
359                  * Unfortunately ITC_DRIFT is not yet part of the
360                  * official SAL spec, so the ITC_DRIFT bit is not
361                  * set by the BIOS on this hardware.
362                  */
363                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
364
365                 cyclone_setup();
366         }
367 }
368
369 static int __init acpi_parse_madt(struct acpi_table_header *table)
370 {
371         if (!table)
372                 return -EINVAL;
373
374         acpi_madt = (struct acpi_table_madt *)table;
375
376         acpi_madt_rev = acpi_madt->header.revision;
377
378         /* remember the value for reference after free_initmem() */
379 #ifdef CONFIG_ITANIUM
380         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
381 #else
382         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
383 #endif
384         iosapic_system_init(has_8259);
385
386         /* Get base address of IPI Message Block */
387
388         if (acpi_madt->address)
389                 ipi_base_addr = ioremap(acpi_madt->address, 0);
390
391         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
392
393         acpi_madt_oem_check(acpi_madt->header.oem_id,
394                             acpi_madt->header.oem_table_id);
395
396         return 0;
397 }
398
399 #ifdef CONFIG_ACPI_NUMA
400
401 #undef SLIT_DEBUG
402
403 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
404
405 static int __initdata srat_num_cpus;    /* number of cpus */
406 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
407 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
408 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
409 static struct acpi_table_slit __initdata *slit_table;
410
411 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
412 {
413         int pxm;
414
415         pxm = pa->proximity_domain_lo;
416         if (ia64_platform_is("sn2"))
417                 pxm += pa->proximity_domain_hi[0] << 8;
418         return pxm;
419 }
420
421 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
422 {
423         int pxm;
424
425         pxm = ma->proximity_domain;
426         if (!ia64_platform_is("sn2"))
427                 pxm &= 0xff;
428
429         return pxm;
430 }
431
432 /*
433  * ACPI 2.0 SLIT (System Locality Information Table)
434  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
435  */
436 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
437 {
438         u32 len;
439
440         len = sizeof(struct acpi_table_header) + 8
441             + slit->locality_count * slit->locality_count;
442         if (slit->header.length != len) {
443                 printk(KERN_ERR
444                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
445                        len, slit->header.length);
446                 memset(numa_slit, 10, sizeof(numa_slit));
447                 return;
448         }
449         slit_table = slit;
450 }
451
452 void __init
453 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
454 {
455         int pxm;
456
457         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
458                 return;
459
460         pxm = get_processor_proximity_domain(pa);
461
462         /* record this node in proximity bitmap */
463         pxm_bit_set(pxm);
464
465         node_cpuid[srat_num_cpus].phys_id =
466             (pa->apic_id << 8) | (pa->local_sapic_eid);
467         /* nid should be overridden as logical node id later */
468         node_cpuid[srat_num_cpus].nid = pxm;
469         srat_num_cpus++;
470 }
471
472 void __init
473 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
474 {
475         unsigned long paddr, size;
476         int pxm;
477         struct node_memblk_s *p, *q, *pend;
478
479         pxm = get_memory_proximity_domain(ma);
480
481         /* fill node memory chunk structure */
482         paddr = ma->base_address;
483         size = ma->length;
484
485         /* Ignore disabled entries */
486         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
487                 return;
488
489         /* record this node in proximity bitmap */
490         pxm_bit_set(pxm);
491
492         /* Insertion sort based on base address */
493         pend = &node_memblk[num_node_memblks];
494         for (p = &node_memblk[0]; p < pend; p++) {
495                 if (paddr < p->start_paddr)
496                         break;
497         }
498         if (p < pend) {
499                 for (q = pend - 1; q >= p; q--)
500                         *(q + 1) = *q;
501         }
502         p->start_paddr = paddr;
503         p->size = size;
504         p->nid = pxm;
505         num_node_memblks++;
506 }
507
508 void __init acpi_numa_arch_fixup(void)
509 {
510         int i, j, node_from, node_to;
511
512         /* If there's no SRAT, fix the phys_id and mark node 0 online */
513         if (srat_num_cpus == 0) {
514                 node_set_online(0);
515                 node_cpuid[0].phys_id = hard_smp_processor_id();
516                 return;
517         }
518
519         /*
520          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
521          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
522          */
523         nodes_clear(node_online_map);
524         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
525                 if (pxm_bit_test(i)) {
526                         int nid = acpi_map_pxm_to_node(i);
527                         node_set_online(nid);
528                 }
529         }
530
531         /* set logical node id in memory chunk structure */
532         for (i = 0; i < num_node_memblks; i++)
533                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
534
535         /* assign memory bank numbers for each chunk on each node */
536         for_each_online_node(i) {
537                 int bank;
538
539                 bank = 0;
540                 for (j = 0; j < num_node_memblks; j++)
541                         if (node_memblk[j].nid == i)
542                                 node_memblk[j].bank = bank++;
543         }
544
545         /* set logical node id in cpu structure */
546         for (i = 0; i < srat_num_cpus; i++)
547                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
548
549         printk(KERN_INFO "Number of logical nodes in system = %d\n",
550                num_online_nodes());
551         printk(KERN_INFO "Number of memory chunks in system = %d\n",
552                num_node_memblks);
553
554         if (!slit_table)
555                 return;
556         memset(numa_slit, -1, sizeof(numa_slit));
557         for (i = 0; i < slit_table->locality_count; i++) {
558                 if (!pxm_bit_test(i))
559                         continue;
560                 node_from = pxm_to_node(i);
561                 for (j = 0; j < slit_table->locality_count; j++) {
562                         if (!pxm_bit_test(j))
563                                 continue;
564                         node_to = pxm_to_node(j);
565                         node_distance(node_from, node_to) =
566                             slit_table->entry[i * slit_table->locality_count + j];
567                 }
568         }
569
570 #ifdef SLIT_DEBUG
571         printk("ACPI 2.0 SLIT locality table:\n");
572         for_each_online_node(i) {
573                 for_each_online_node(j)
574                     printk("%03d ", node_distance(i, j));
575                 printk("\n");
576         }
577 #endif
578 }
579 #endif                          /* CONFIG_ACPI_NUMA */
580
581 /*
582  * success: return IRQ number (>=0)
583  * failure: return < 0
584  */
585 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
586 {
587         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
588                 return gsi;
589
590         if (has_8259 && gsi < 16)
591                 return isa_irq_to_vector(gsi);
592
593         return iosapic_register_intr(gsi,
594                                      (polarity ==
595                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
596                                      IOSAPIC_POL_LOW,
597                                      (triggering ==
598                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
599                                      IOSAPIC_LEVEL);
600 }
601
602 EXPORT_SYMBOL(acpi_register_gsi);
603
604 void acpi_unregister_gsi(u32 gsi)
605 {
606         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
607                 return;
608
609         iosapic_unregister_intr(gsi);
610 }
611
612 EXPORT_SYMBOL(acpi_unregister_gsi);
613
614 static int __init acpi_parse_fadt(struct acpi_table_header *table)
615 {
616         struct acpi_table_header *fadt_header;
617         struct acpi_table_fadt *fadt;
618
619         if (!table)
620                 return -EINVAL;
621
622         fadt_header = (struct acpi_table_header *)table;
623         if (fadt_header->revision != 3)
624                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
625
626         fadt = (struct acpi_table_fadt *)fadt_header;
627
628         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
629         return 0;
630 }
631
632 unsigned long __init acpi_find_rsdp(void)
633 {
634         unsigned long rsdp_phys = 0;
635
636         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
637                 rsdp_phys = efi.acpi20;
638         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
639                 printk(KERN_WARNING PREFIX
640                        "v1.0/r0.71 tables no longer supported\n");
641         return rsdp_phys;
642 }
643
644 int __init acpi_boot_init(void)
645 {
646
647         /*
648          * MADT
649          * ----
650          * Parse the Multiple APIC Description Table (MADT), if exists.
651          * Note that this table provides platform SMP configuration
652          * information -- the successor to MPS tables.
653          */
654
655         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
656                 printk(KERN_ERR PREFIX "Can't find MADT\n");
657                 goto skip_madt;
658         }
659
660         /* Local APIC */
661
662         if (acpi_table_parse_madt
663             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
664                 printk(KERN_ERR PREFIX
665                        "Error parsing LAPIC address override entry\n");
666
667         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
668             < 1)
669                 printk(KERN_ERR PREFIX
670                        "Error parsing MADT - no LAPIC entries\n");
671
672         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
673             < 0)
674                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
675
676         /* I/O APIC */
677
678         if (acpi_table_parse_madt
679             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
680                 printk(KERN_ERR PREFIX
681                        "Error parsing MADT - no IOSAPIC entries\n");
682
683         /* System-Level Interrupt Routing */
684
685         if (acpi_table_parse_madt
686             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
687              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
688                 printk(KERN_ERR PREFIX
689                        "Error parsing platform interrupt source entry\n");
690
691         if (acpi_table_parse_madt
692             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
693                 printk(KERN_ERR PREFIX
694                        "Error parsing interrupt source overrides entry\n");
695
696         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
697                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
698       skip_madt:
699
700         /*
701          * FADT says whether a legacy keyboard controller is present.
702          * The FADT also contains an SCI_INT line, by which the system
703          * gets interrupts such as power and sleep buttons.  If it's not
704          * on a Legacy interrupt, it needs to be setup.
705          */
706         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
707                 printk(KERN_ERR PREFIX "Can't find FADT\n");
708
709 #ifdef CONFIG_SMP
710         if (available_cpus == 0) {
711                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
712                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
713                 smp_boot_data.cpu_phys_id[available_cpus] =
714                     hard_smp_processor_id();
715                 available_cpus = 1;     /* We've got at least one of these, no? */
716         }
717         smp_boot_data.cpu_count = available_cpus;
718
719         smp_build_cpu_map();
720 # ifdef CONFIG_ACPI_NUMA
721         if (srat_num_cpus == 0) {
722                 int cpu, i = 1;
723                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
724                         if (smp_boot_data.cpu_phys_id[cpu] !=
725                             hard_smp_processor_id())
726                                 node_cpuid[i++].phys_id =
727                                     smp_boot_data.cpu_phys_id[cpu];
728         }
729 # endif
730 #endif
731 #ifdef CONFIG_ACPI_NUMA
732         build_cpu_to_node_map();
733 #endif
734         /* Make boot-up look pretty */
735         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
736                total_cpus);
737         return 0;
738 }
739
740 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
741 {
742         int vector;
743
744         if (has_8259 && gsi < 16)
745                 *irq = isa_irq_to_vector(gsi);
746         else {
747                 vector = gsi_to_vector(gsi);
748                 if (vector == -1)
749                         return -1;
750
751                 *irq = vector;
752         }
753         return 0;
754 }
755
756 /*
757  *  ACPI based hotplug CPU support
758  */
759 #ifdef CONFIG_ACPI_HOTPLUG_CPU
760 static
761 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
762 {
763 #ifdef CONFIG_ACPI_NUMA
764         int pxm_id;
765         int nid;
766
767         pxm_id = acpi_get_pxm(handle);
768         /*
769          * We don't have cpu-only-node hotadd. But if the system equips
770          * SRAT table, pxm is already found and node is ready.
771          * So, just pxm_to_nid(pxm) is OK.
772          * This code here is for the system which doesn't have full SRAT
773          * table for possible cpus.
774          */
775         nid = acpi_map_pxm_to_node(pxm_id);
776         node_cpuid[cpu].phys_id = physid;
777         node_cpuid[cpu].nid = nid;
778 #endif
779         return (0);
780 }
781
782 int additional_cpus __initdata = -1;
783
784 static __init int setup_additional_cpus(char *s)
785 {
786         if (s)
787                 additional_cpus = simple_strtol(s, NULL, 0);
788
789         return 0;
790 }
791
792 early_param("additional_cpus", setup_additional_cpus);
793
794 /*
795  * cpu_possible_map should be static, it cannot change as CPUs
796  * are onlined, or offlined. The reason is per-cpu data-structures
797  * are allocated by some modules at init time, and dont expect to
798  * do this dynamically on cpu arrival/departure.
799  * cpu_present_map on the other hand can change dynamically.
800  * In case when cpu_hotplug is not compiled, then we resort to current
801  * behaviour, which is cpu_possible == cpu_present.
802  * - Ashok Raj
803  *
804  * Three ways to find out the number of additional hotplug CPUs:
805  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
806  * - The user can overwrite it with additional_cpus=NUM
807  * - Otherwise don't reserve additional CPUs.
808  */
809 __init void prefill_possible_map(void)
810 {
811         int i;
812         int possible, disabled_cpus;
813
814         disabled_cpus = total_cpus - available_cpus;
815
816         if (additional_cpus == -1) {
817                 if (disabled_cpus > 0)
818                         additional_cpus = disabled_cpus;
819                 else
820                         additional_cpus = 0;
821         }
822
823         possible = available_cpus + additional_cpus;
824
825         if (possible > NR_CPUS)
826                 possible = NR_CPUS;
827
828         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
829                 possible, max((possible - available_cpus), 0));
830
831         for (i = 0; i < possible; i++)
832                 cpu_set(i, cpu_possible_map);
833 }
834
835 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
836 {
837         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
838         union acpi_object *obj;
839         struct acpi_madt_local_sapic *lsapic;
840         cpumask_t tmp_map;
841         long physid;
842         int cpu;
843
844         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
845                 return -EINVAL;
846
847         if (!buffer.length || !buffer.pointer)
848                 return -EINVAL;
849
850         obj = buffer.pointer;
851         if (obj->type != ACPI_TYPE_BUFFER)
852         {
853                 kfree(buffer.pointer);
854                 return -EINVAL;
855         }
856
857         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
858
859         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
860             (!lsapic->lapic_flags & ACPI_MADT_ENABLED)) {
861                 kfree(buffer.pointer);
862                 return -EINVAL;
863         }
864
865         physid = ((lsapic->id << 8) | (lsapic->eid));
866
867         kfree(buffer.pointer);
868         buffer.length = ACPI_ALLOCATE_BUFFER;
869         buffer.pointer = NULL;
870
871         cpus_complement(tmp_map, cpu_present_map);
872         cpu = first_cpu(tmp_map);
873         if (cpu >= NR_CPUS)
874                 return -EINVAL;
875
876         acpi_map_cpu2node(handle, cpu, physid);
877
878         cpu_set(cpu, cpu_present_map);
879         ia64_cpu_to_sapicid[cpu] = physid;
880
881         *pcpu = cpu;
882         return (0);
883 }
884
885 EXPORT_SYMBOL(acpi_map_lsapic);
886
887 int acpi_unmap_lsapic(int cpu)
888 {
889         ia64_cpu_to_sapicid[cpu] = -1;
890         cpu_clear(cpu, cpu_present_map);
891
892 #ifdef CONFIG_ACPI_NUMA
893         /* NUMA specific cleanup's */
894 #endif
895
896         return (0);
897 }
898
899 EXPORT_SYMBOL(acpi_unmap_lsapic);
900 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
901
902 #ifdef CONFIG_ACPI_NUMA
903 static acpi_status __devinit
904 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
905 {
906         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
907         union acpi_object *obj;
908         struct acpi_madt_io_sapic *iosapic;
909         unsigned int gsi_base;
910         int pxm, node;
911
912         /* Only care about objects w/ a method that returns the MADT */
913         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
914                 return AE_OK;
915
916         if (!buffer.length || !buffer.pointer)
917                 return AE_OK;
918
919         obj = buffer.pointer;
920         if (obj->type != ACPI_TYPE_BUFFER ||
921             obj->buffer.length < sizeof(*iosapic)) {
922                 kfree(buffer.pointer);
923                 return AE_OK;
924         }
925
926         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
927
928         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
929                 kfree(buffer.pointer);
930                 return AE_OK;
931         }
932
933         gsi_base = iosapic->global_irq_base;
934
935         kfree(buffer.pointer);
936
937         /*
938          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
939          * us which node to associate this with.
940          */
941         pxm = acpi_get_pxm(handle);
942         if (pxm < 0)
943                 return AE_OK;
944
945         node = pxm_to_node(pxm);
946
947         if (node >= MAX_NUMNODES || !node_online(node) ||
948             cpus_empty(node_to_cpumask(node)))
949                 return AE_OK;
950
951         /* We know a gsi to node mapping! */
952         map_iosapic_to_node(gsi_base, node);
953         return AE_OK;
954 }
955
956 static int __init
957 acpi_map_iosapics (void)
958 {
959         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
960         return 0;
961 }
962
963 fs_initcall(acpi_map_iosapics);
964 #endif                          /* CONFIG_ACPI_NUMA */
965
966 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
967 {
968         int err;
969
970         if ((err = iosapic_init(phys_addr, gsi_base)))
971                 return err;
972
973 #ifdef CONFIG_ACPI_NUMA
974         acpi_map_iosapic(handle, 0, NULL, NULL);
975 #endif                          /* CONFIG_ACPI_NUMA */
976
977         return 0;
978 }
979
980 EXPORT_SYMBOL(acpi_register_ioapic);
981
982 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
983 {
984         return iosapic_remove(gsi_base);
985 }
986
987 EXPORT_SYMBOL(acpi_unregister_ioapic);
988
989 #endif                          /* CONFIG_ACPI */