Merge branch 'pxa-devel' into pxa
[linux-2.6] / 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                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
121                         return "uv";
122                 else
123                         return "sn2";
124         }
125
126         return "dig";
127 #else
128 # if defined (CONFIG_IA64_HP_SIM)
129         return "hpsim";
130 # elif defined (CONFIG_IA64_HP_ZX1)
131         return "hpzx1";
132 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
133         return "hpzx1_swiotlb";
134 # elif defined (CONFIG_IA64_SGI_SN2)
135         return "sn2";
136 # elif defined (CONFIG_IA64_SGI_UV)
137         return "uv";
138 # elif defined (CONFIG_IA64_DIG)
139         return "dig";
140 # else
141 #       error Unknown platform.  Fix acpi.c.
142 # endif
143 #endif
144 }
145
146 #ifdef CONFIG_ACPI
147
148 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
149
150 /* Array to record platform interrupt vectors for generic interrupt routing. */
151 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
152         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
153 };
154
155 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
156
157 /*
158  * Interrupt routing API for device drivers.  Provides interrupt vector for
159  * a generic platform event.  Currently only CPEI is implemented.
160  */
161 int acpi_request_vector(u32 int_type)
162 {
163         int vector = -1;
164
165         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
166                 /* corrected platform error interrupt */
167                 vector = platform_intr_list[int_type];
168         } else
169                 printk(KERN_ERR
170                        "acpi_request_vector(): invalid interrupt type\n");
171         return vector;
172 }
173
174 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
175 {
176         return __va(phys_addr);
177 }
178
179 /* --------------------------------------------------------------------------
180                             Boot-time Table Parsing
181    -------------------------------------------------------------------------- */
182
183 static int total_cpus __initdata;
184 static int available_cpus __initdata;
185 struct acpi_table_madt *acpi_madt __initdata;
186 static u8 has_8259;
187
188 static int __init
189 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
190                           const unsigned long end)
191 {
192         struct acpi_madt_local_apic_override *lapic;
193
194         lapic = (struct acpi_madt_local_apic_override *)header;
195
196         if (BAD_MADT_ENTRY(lapic, end))
197                 return -EINVAL;
198
199         if (lapic->address) {
200                 iounmap(ipi_base_addr);
201                 ipi_base_addr = ioremap(lapic->address, 0);
202         }
203         return 0;
204 }
205
206 static int __init
207 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
208 {
209         struct acpi_madt_local_sapic *lsapic;
210
211         lsapic = (struct acpi_madt_local_sapic *)header;
212
213         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
214
215         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
216 #ifdef CONFIG_SMP
217                 smp_boot_data.cpu_phys_id[available_cpus] =
218                     (lsapic->id << 8) | lsapic->eid;
219 #endif
220                 ++available_cpus;
221         }
222
223         total_cpus++;
224         return 0;
225 }
226
227 static int __init
228 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
229 {
230         struct acpi_madt_local_apic_nmi *lacpi_nmi;
231
232         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
233
234         if (BAD_MADT_ENTRY(lacpi_nmi, end))
235                 return -EINVAL;
236
237         /* TBD: Support lapic_nmi entries */
238         return 0;
239 }
240
241 static int __init
242 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
243 {
244         struct acpi_madt_io_sapic *iosapic;
245
246         iosapic = (struct acpi_madt_io_sapic *)header;
247
248         if (BAD_MADT_ENTRY(iosapic, end))
249                 return -EINVAL;
250
251         return iosapic_init(iosapic->address, iosapic->global_irq_base);
252 }
253
254 static unsigned int __initdata acpi_madt_rev;
255
256 static int __init
257 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
258                         const unsigned long end)
259 {
260         struct acpi_madt_interrupt_source *plintsrc;
261         int vector;
262
263         plintsrc = (struct acpi_madt_interrupt_source *)header;
264
265         if (BAD_MADT_ENTRY(plintsrc, end))
266                 return -EINVAL;
267
268         /*
269          * Get vector assignment for this interrupt, set attributes,
270          * and program the IOSAPIC routing table.
271          */
272         vector = iosapic_register_platform_intr(plintsrc->type,
273                                                 plintsrc->global_irq,
274                                                 plintsrc->io_sapic_vector,
275                                                 plintsrc->eid,
276                                                 plintsrc->id,
277                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
278                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
279                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
280                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
281                                                  ACPI_MADT_TRIGGER_EDGE) ?
282                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
283
284         platform_intr_list[plintsrc->type] = vector;
285         if (acpi_madt_rev > 1) {
286                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
287         }
288
289         /*
290          * Save the physical id, so we can check when its being removed
291          */
292         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
293
294         return 0;
295 }
296
297 #ifdef CONFIG_HOTPLUG_CPU
298 unsigned int can_cpei_retarget(void)
299 {
300         extern int cpe_vector;
301         extern unsigned int force_cpei_retarget;
302
303         /*
304          * Only if CPEI is supported and the override flag
305          * is present, otherwise return that its re-targettable
306          * if we are in polling mode.
307          */
308         if (cpe_vector > 0) {
309                 if (acpi_cpei_override || force_cpei_retarget)
310                         return 1;
311                 else
312                         return 0;
313         }
314         return 1;
315 }
316
317 unsigned int is_cpu_cpei_target(unsigned int cpu)
318 {
319         unsigned int logical_id;
320
321         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
322
323         if (logical_id == cpu)
324                 return 1;
325         else
326                 return 0;
327 }
328
329 void set_cpei_target_cpu(unsigned int cpu)
330 {
331         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
332 }
333 #endif
334
335 unsigned int get_cpei_target_cpu(void)
336 {
337         return acpi_cpei_phys_cpuid;
338 }
339
340 static int __init
341 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
342                        const unsigned long end)
343 {
344         struct acpi_madt_interrupt_override *p;
345
346         p = (struct acpi_madt_interrupt_override *)header;
347
348         if (BAD_MADT_ENTRY(p, end))
349                 return -EINVAL;
350
351         iosapic_override_isa_irq(p->source_irq, p->global_irq,
352                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
353                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
354                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
355                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
356                                  ACPI_MADT_TRIGGER_EDGE) ?
357                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
358         return 0;
359 }
360
361 static int __init
362 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
363 {
364         struct acpi_madt_nmi_source *nmi_src;
365
366         nmi_src = (struct acpi_madt_nmi_source *)header;
367
368         if (BAD_MADT_ENTRY(nmi_src, end))
369                 return -EINVAL;
370
371         /* TBD: Support nimsrc entries */
372         return 0;
373 }
374
375 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
376 {
377         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
378
379                 /*
380                  * Unfortunately ITC_DRIFT is not yet part of the
381                  * official SAL spec, so the ITC_DRIFT bit is not
382                  * set by the BIOS on this hardware.
383                  */
384                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
385
386                 cyclone_setup();
387         }
388 }
389
390 static int __init acpi_parse_madt(struct acpi_table_header *table)
391 {
392         if (!table)
393                 return -EINVAL;
394
395         acpi_madt = (struct acpi_table_madt *)table;
396
397         acpi_madt_rev = acpi_madt->header.revision;
398
399         /* remember the value for reference after free_initmem() */
400 #ifdef CONFIG_ITANIUM
401         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
402 #else
403         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
404 #endif
405         iosapic_system_init(has_8259);
406
407         /* Get base address of IPI Message Block */
408
409         if (acpi_madt->address)
410                 ipi_base_addr = ioremap(acpi_madt->address, 0);
411
412         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
413
414         acpi_madt_oem_check(acpi_madt->header.oem_id,
415                             acpi_madt->header.oem_table_id);
416
417         return 0;
418 }
419
420 #ifdef CONFIG_ACPI_NUMA
421
422 #undef SLIT_DEBUG
423
424 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
425
426 static int __initdata srat_num_cpus;    /* number of cpus */
427 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
428 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
429 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
430 static struct acpi_table_slit __initdata *slit_table;
431 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
432
433 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
434 {
435         int pxm;
436
437         pxm = pa->proximity_domain_lo;
438         if (ia64_platform_is("sn2"))
439                 pxm += pa->proximity_domain_hi[0] << 8;
440         return pxm;
441 }
442
443 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
444 {
445         int pxm;
446
447         pxm = ma->proximity_domain;
448         if (!ia64_platform_is("sn2"))
449                 pxm &= 0xff;
450
451         return pxm;
452 }
453
454 /*
455  * ACPI 2.0 SLIT (System Locality Information Table)
456  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
457  */
458 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
459 {
460         u32 len;
461
462         len = sizeof(struct acpi_table_header) + 8
463             + slit->locality_count * slit->locality_count;
464         if (slit->header.length != len) {
465                 printk(KERN_ERR
466                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
467                        len, slit->header.length);
468                 return;
469         }
470         slit_table = slit;
471 }
472
473 void __init
474 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
475 {
476         int pxm;
477
478         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
479                 return;
480
481         pxm = get_processor_proximity_domain(pa);
482
483         /* record this node in proximity bitmap */
484         pxm_bit_set(pxm);
485
486         node_cpuid[srat_num_cpus].phys_id =
487             (pa->apic_id << 8) | (pa->local_sapic_eid);
488         /* nid should be overridden as logical node id later */
489         node_cpuid[srat_num_cpus].nid = pxm;
490         cpu_set(srat_num_cpus, early_cpu_possible_map);
491         srat_num_cpus++;
492 }
493
494 void __init
495 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
496 {
497         unsigned long paddr, size;
498         int pxm;
499         struct node_memblk_s *p, *q, *pend;
500
501         pxm = get_memory_proximity_domain(ma);
502
503         /* fill node memory chunk structure */
504         paddr = ma->base_address;
505         size = ma->length;
506
507         /* Ignore disabled entries */
508         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
509                 return;
510
511         /* record this node in proximity bitmap */
512         pxm_bit_set(pxm);
513
514         /* Insertion sort based on base address */
515         pend = &node_memblk[num_node_memblks];
516         for (p = &node_memblk[0]; p < pend; p++) {
517                 if (paddr < p->start_paddr)
518                         break;
519         }
520         if (p < pend) {
521                 for (q = pend - 1; q >= p; q--)
522                         *(q + 1) = *q;
523         }
524         p->start_paddr = paddr;
525         p->size = size;
526         p->nid = pxm;
527         num_node_memblks++;
528 }
529
530 void __init acpi_numa_arch_fixup(void)
531 {
532         int i, j, node_from, node_to;
533
534         /* If there's no SRAT, fix the phys_id and mark node 0 online */
535         if (srat_num_cpus == 0) {
536                 node_set_online(0);
537                 node_cpuid[0].phys_id = hard_smp_processor_id();
538                 return;
539         }
540
541         /*
542          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
543          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
544          */
545         nodes_clear(node_online_map);
546         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
547                 if (pxm_bit_test(i)) {
548                         int nid = acpi_map_pxm_to_node(i);
549                         node_set_online(nid);
550                 }
551         }
552
553         /* set logical node id in memory chunk structure */
554         for (i = 0; i < num_node_memblks; i++)
555                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
556
557         /* assign memory bank numbers for each chunk on each node */
558         for_each_online_node(i) {
559                 int bank;
560
561                 bank = 0;
562                 for (j = 0; j < num_node_memblks; j++)
563                         if (node_memblk[j].nid == i)
564                                 node_memblk[j].bank = bank++;
565         }
566
567         /* set logical node id in cpu structure */
568         for_each_possible_early_cpu(i)
569                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
570
571         printk(KERN_INFO "Number of logical nodes in system = %d\n",
572                num_online_nodes());
573         printk(KERN_INFO "Number of memory chunks in system = %d\n",
574                num_node_memblks);
575
576         if (!slit_table) {
577                 for (i = 0; i < MAX_NUMNODES; i++)
578                         for (j = 0; j < MAX_NUMNODES; j++)
579                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
580                                                         REMOTE_DISTANCE;
581                 return;
582         }
583
584         memset(numa_slit, -1, sizeof(numa_slit));
585         for (i = 0; i < slit_table->locality_count; i++) {
586                 if (!pxm_bit_test(i))
587                         continue;
588                 node_from = pxm_to_node(i);
589                 for (j = 0; j < slit_table->locality_count; j++) {
590                         if (!pxm_bit_test(j))
591                                 continue;
592                         node_to = pxm_to_node(j);
593                         node_distance(node_from, node_to) =
594                             slit_table->entry[i * slit_table->locality_count + j];
595                 }
596         }
597
598 #ifdef SLIT_DEBUG
599         printk("ACPI 2.0 SLIT locality table:\n");
600         for_each_online_node(i) {
601                 for_each_online_node(j)
602                     printk("%03d ", node_distance(i, j));
603                 printk("\n");
604         }
605 #endif
606 }
607 #endif                          /* CONFIG_ACPI_NUMA */
608
609 /*
610  * success: return IRQ number (>=0)
611  * failure: return < 0
612  */
613 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
614 {
615         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
616                 return gsi;
617
618         if (has_8259 && gsi < 16)
619                 return isa_irq_to_vector(gsi);
620
621         return iosapic_register_intr(gsi,
622                                      (polarity ==
623                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
624                                      IOSAPIC_POL_LOW,
625                                      (triggering ==
626                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
627                                      IOSAPIC_LEVEL);
628 }
629
630 void acpi_unregister_gsi(u32 gsi)
631 {
632         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
633                 return;
634
635         if (has_8259 && gsi < 16)
636                 return;
637
638         iosapic_unregister_intr(gsi);
639 }
640
641 static int __init acpi_parse_fadt(struct acpi_table_header *table)
642 {
643         struct acpi_table_header *fadt_header;
644         struct acpi_table_fadt *fadt;
645
646         if (!table)
647                 return -EINVAL;
648
649         fadt_header = (struct acpi_table_header *)table;
650         if (fadt_header->revision != 3)
651                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
652
653         fadt = (struct acpi_table_fadt *)fadt_header;
654
655         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
656         return 0;
657 }
658
659 int __init acpi_boot_init(void)
660 {
661
662         /*
663          * MADT
664          * ----
665          * Parse the Multiple APIC Description Table (MADT), if exists.
666          * Note that this table provides platform SMP configuration
667          * information -- the successor to MPS tables.
668          */
669
670         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
671                 printk(KERN_ERR PREFIX "Can't find MADT\n");
672                 goto skip_madt;
673         }
674
675         /* Local APIC */
676
677         if (acpi_table_parse_madt
678             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
679                 printk(KERN_ERR PREFIX
680                        "Error parsing LAPIC address override entry\n");
681
682         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_lsapic, NR_CPUS)
683             < 1)
684                 printk(KERN_ERR PREFIX
685                        "Error parsing MADT - no LAPIC entries\n");
686
687         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
688             < 0)
689                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
690
691         /* I/O APIC */
692
693         if (acpi_table_parse_madt
694             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
695                 if (!ia64_platform_is("sn2"))
696                         printk(KERN_ERR PREFIX
697                                "Error parsing MADT - no IOSAPIC entries\n");
698         }
699
700         /* System-Level Interrupt Routing */
701
702         if (acpi_table_parse_madt
703             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
704              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
705                 printk(KERN_ERR PREFIX
706                        "Error parsing platform interrupt source entry\n");
707
708         if (acpi_table_parse_madt
709             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
710                 printk(KERN_ERR PREFIX
711                        "Error parsing interrupt source overrides entry\n");
712
713         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
714                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
715       skip_madt:
716
717         /*
718          * FADT says whether a legacy keyboard controller is present.
719          * The FADT also contains an SCI_INT line, by which the system
720          * gets interrupts such as power and sleep buttons.  If it's not
721          * on a Legacy interrupt, it needs to be setup.
722          */
723         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
724                 printk(KERN_ERR PREFIX "Can't find FADT\n");
725
726 #ifdef CONFIG_SMP
727         if (available_cpus == 0) {
728                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
729                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
730                 smp_boot_data.cpu_phys_id[available_cpus] =
731                     hard_smp_processor_id();
732                 available_cpus = 1;     /* We've got at least one of these, no? */
733         }
734         smp_boot_data.cpu_count = available_cpus;
735
736         smp_build_cpu_map();
737 # ifdef CONFIG_ACPI_NUMA
738         if (srat_num_cpus == 0) {
739                 int cpu, i = 1;
740                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
741                         if (smp_boot_data.cpu_phys_id[cpu] !=
742                             hard_smp_processor_id())
743                                 node_cpuid[i++].phys_id =
744                                     smp_boot_data.cpu_phys_id[cpu];
745         }
746 # endif
747 #endif
748 #ifdef CONFIG_ACPI_NUMA
749         build_cpu_to_node_map();
750 #endif
751         /* Make boot-up look pretty */
752         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
753                total_cpus);
754         return 0;
755 }
756
757 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
758 {
759         int tmp;
760
761         if (has_8259 && gsi < 16)
762                 *irq = isa_irq_to_vector(gsi);
763         else {
764                 tmp = gsi_to_irq(gsi);
765                 if (tmp == -1)
766                         return -1;
767                 *irq = tmp;
768         }
769         return 0;
770 }
771
772 /*
773  *  ACPI based hotplug CPU support
774  */
775 #ifdef CONFIG_ACPI_HOTPLUG_CPU
776 static
777 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
778 {
779 #ifdef CONFIG_ACPI_NUMA
780         int pxm_id;
781         int nid;
782
783         pxm_id = acpi_get_pxm(handle);
784         /*
785          * We don't have cpu-only-node hotadd. But if the system equips
786          * SRAT table, pxm is already found and node is ready.
787          * So, just pxm_to_nid(pxm) is OK.
788          * This code here is for the system which doesn't have full SRAT
789          * table for possible cpus.
790          */
791         nid = acpi_map_pxm_to_node(pxm_id);
792         node_cpuid[cpu].phys_id = physid;
793         node_cpuid[cpu].nid = nid;
794 #endif
795         return (0);
796 }
797
798 int additional_cpus __initdata = -1;
799
800 static __init int setup_additional_cpus(char *s)
801 {
802         if (s)
803                 additional_cpus = simple_strtol(s, NULL, 0);
804
805         return 0;
806 }
807
808 early_param("additional_cpus", setup_additional_cpus);
809
810 /*
811  * cpu_possible_map should be static, it cannot change as CPUs
812  * are onlined, or offlined. The reason is per-cpu data-structures
813  * are allocated by some modules at init time, and dont expect to
814  * do this dynamically on cpu arrival/departure.
815  * cpu_present_map on the other hand can change dynamically.
816  * In case when cpu_hotplug is not compiled, then we resort to current
817  * behaviour, which is cpu_possible == cpu_present.
818  * - Ashok Raj
819  *
820  * Three ways to find out the number of additional hotplug CPUs:
821  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
822  * - The user can overwrite it with additional_cpus=NUM
823  * - Otherwise don't reserve additional CPUs.
824  */
825 __init void prefill_possible_map(void)
826 {
827         int i;
828         int possible, disabled_cpus;
829
830         disabled_cpus = total_cpus - available_cpus;
831
832         if (additional_cpus == -1) {
833                 if (disabled_cpus > 0)
834                         additional_cpus = disabled_cpus;
835                 else
836                         additional_cpus = 0;
837         }
838
839         possible = available_cpus + additional_cpus;
840
841         if (possible > NR_CPUS)
842                 possible = NR_CPUS;
843
844         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
845                 possible, max((possible - available_cpus), 0));
846
847         for (i = 0; i < possible; i++)
848                 cpu_set(i, cpu_possible_map);
849 }
850
851 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
852 {
853         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
854         union acpi_object *obj;
855         struct acpi_madt_local_sapic *lsapic;
856         cpumask_t tmp_map;
857         long physid;
858         int cpu;
859
860         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
861                 return -EINVAL;
862
863         if (!buffer.length || !buffer.pointer)
864                 return -EINVAL;
865
866         obj = buffer.pointer;
867         if (obj->type != ACPI_TYPE_BUFFER)
868         {
869                 kfree(buffer.pointer);
870                 return -EINVAL;
871         }
872
873         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
874
875         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
876             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
877                 kfree(buffer.pointer);
878                 return -EINVAL;
879         }
880
881         physid = ((lsapic->id << 8) | (lsapic->eid));
882
883         kfree(buffer.pointer);
884         buffer.length = ACPI_ALLOCATE_BUFFER;
885         buffer.pointer = NULL;
886
887         cpus_complement(tmp_map, cpu_present_map);
888         cpu = first_cpu(tmp_map);
889         if (cpu >= NR_CPUS)
890                 return -EINVAL;
891
892         acpi_map_cpu2node(handle, cpu, physid);
893
894         cpu_set(cpu, cpu_present_map);
895         ia64_cpu_to_sapicid[cpu] = physid;
896
897         *pcpu = cpu;
898         return (0);
899 }
900
901 EXPORT_SYMBOL(acpi_map_lsapic);
902
903 int acpi_unmap_lsapic(int cpu)
904 {
905         ia64_cpu_to_sapicid[cpu] = -1;
906         cpu_clear(cpu, cpu_present_map);
907
908 #ifdef CONFIG_ACPI_NUMA
909         /* NUMA specific cleanup's */
910 #endif
911
912         return (0);
913 }
914
915 EXPORT_SYMBOL(acpi_unmap_lsapic);
916 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
917
918 #ifdef CONFIG_ACPI_NUMA
919 static acpi_status __devinit
920 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
921 {
922         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
923         union acpi_object *obj;
924         struct acpi_madt_io_sapic *iosapic;
925         unsigned int gsi_base;
926         int pxm, node;
927
928         /* Only care about objects w/ a method that returns the MADT */
929         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
930                 return AE_OK;
931
932         if (!buffer.length || !buffer.pointer)
933                 return AE_OK;
934
935         obj = buffer.pointer;
936         if (obj->type != ACPI_TYPE_BUFFER ||
937             obj->buffer.length < sizeof(*iosapic)) {
938                 kfree(buffer.pointer);
939                 return AE_OK;
940         }
941
942         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
943
944         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
945                 kfree(buffer.pointer);
946                 return AE_OK;
947         }
948
949         gsi_base = iosapic->global_irq_base;
950
951         kfree(buffer.pointer);
952
953         /*
954          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
955          * us which node to associate this with.
956          */
957         pxm = acpi_get_pxm(handle);
958         if (pxm < 0)
959                 return AE_OK;
960
961         node = pxm_to_node(pxm);
962
963         if (node >= MAX_NUMNODES || !node_online(node) ||
964             cpus_empty(node_to_cpumask(node)))
965                 return AE_OK;
966
967         /* We know a gsi to node mapping! */
968         map_iosapic_to_node(gsi_base, node);
969         return AE_OK;
970 }
971
972 static int __init
973 acpi_map_iosapics (void)
974 {
975         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
976         return 0;
977 }
978
979 fs_initcall(acpi_map_iosapics);
980 #endif                          /* CONFIG_ACPI_NUMA */
981
982 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
983 {
984         int err;
985
986         if ((err = iosapic_init(phys_addr, gsi_base)))
987                 return err;
988
989 #ifdef CONFIG_ACPI_NUMA
990         acpi_map_iosapic(handle, 0, NULL, NULL);
991 #endif                          /* CONFIG_ACPI_NUMA */
992
993         return 0;
994 }
995
996 EXPORT_SYMBOL(acpi_register_ioapic);
997
998 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
999 {
1000         return iosapic_remove(gsi_base);
1001 }
1002
1003 EXPORT_SYMBOL(acpi_unregister_ioapic);
1004
1005 /*
1006  * acpi_save_state_mem() - save kernel state
1007  *
1008  * TBD when when IA64 starts to support suspend...
1009  */
1010 int acpi_save_state_mem(void) { return 0; } 
1011
1012 /*
1013  * acpi_restore_state()
1014  */
1015 void acpi_restore_state_mem(void) {}
1016
1017 /*
1018  * do_suspend_lowlevel()
1019  */
1020 void do_suspend_lowlevel(void) {}
1021
1022 #endif                          /* CONFIG_ACPI */