Merge branch 'linus' into release
[linux-2.6.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 available_cpus __initdata;
207 struct acpi_table_madt *acpi_madt __initdata;
208 static u8 has_8259;
209
210 static int __init
211 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
212                           const unsigned long end)
213 {
214         struct acpi_madt_local_apic_override *lapic;
215
216         lapic = (struct acpi_madt_local_apic_override *)header;
217
218         if (BAD_MADT_ENTRY(lapic, end))
219                 return -EINVAL;
220
221         if (lapic->address) {
222                 iounmap(ipi_base_addr);
223                 ipi_base_addr = ioremap(lapic->address, 0);
224         }
225         return 0;
226 }
227
228 static int __init
229 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
230 {
231         struct acpi_madt_local_sapic *lsapic;
232
233         lsapic = (struct acpi_madt_local_sapic *)header;
234
235         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
236
237         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
238 #ifdef CONFIG_SMP
239                 smp_boot_data.cpu_phys_id[available_cpus] =
240                     (lsapic->id << 8) | lsapic->eid;
241 #endif
242                 ++available_cpus;
243         }
244
245         total_cpus++;
246         return 0;
247 }
248
249 static int __init
250 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
251 {
252         struct acpi_madt_local_apic_nmi *lacpi_nmi;
253
254         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
255
256         if (BAD_MADT_ENTRY(lacpi_nmi, end))
257                 return -EINVAL;
258
259         /* TBD: Support lapic_nmi entries */
260         return 0;
261 }
262
263 static int __init
264 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
265 {
266         struct acpi_madt_io_sapic *iosapic;
267
268         iosapic = (struct acpi_madt_io_sapic *)header;
269
270         if (BAD_MADT_ENTRY(iosapic, end))
271                 return -EINVAL;
272
273         return iosapic_init(iosapic->address, iosapic->global_irq_base);
274 }
275
276 static unsigned int __initdata acpi_madt_rev;
277
278 static int __init
279 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
280                         const unsigned long end)
281 {
282         struct acpi_madt_interrupt_source *plintsrc;
283         int vector;
284
285         plintsrc = (struct acpi_madt_interrupt_source *)header;
286
287         if (BAD_MADT_ENTRY(plintsrc, end))
288                 return -EINVAL;
289
290         /*
291          * Get vector assignment for this interrupt, set attributes,
292          * and program the IOSAPIC routing table.
293          */
294         vector = iosapic_register_platform_intr(plintsrc->type,
295                                                 plintsrc->global_irq,
296                                                 plintsrc->io_sapic_vector,
297                                                 plintsrc->eid,
298                                                 plintsrc->id,
299                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
300                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
301                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
302                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
303                                                  ACPI_MADT_TRIGGER_EDGE) ?
304                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
305
306         platform_intr_list[plintsrc->type] = vector;
307         if (acpi_madt_rev > 1) {
308                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
309         }
310
311         /*
312          * Save the physical id, so we can check when its being removed
313          */
314         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
315
316         return 0;
317 }
318
319 #ifdef CONFIG_HOTPLUG_CPU
320 unsigned int can_cpei_retarget(void)
321 {
322         extern int cpe_vector;
323         extern unsigned int force_cpei_retarget;
324
325         /*
326          * Only if CPEI is supported and the override flag
327          * is present, otherwise return that its re-targettable
328          * if we are in polling mode.
329          */
330         if (cpe_vector > 0) {
331                 if (acpi_cpei_override || force_cpei_retarget)
332                         return 1;
333                 else
334                         return 0;
335         }
336         return 1;
337 }
338
339 unsigned int is_cpu_cpei_target(unsigned int cpu)
340 {
341         unsigned int logical_id;
342
343         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
344
345         if (logical_id == cpu)
346                 return 1;
347         else
348                 return 0;
349 }
350
351 void set_cpei_target_cpu(unsigned int cpu)
352 {
353         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
354 }
355 #endif
356
357 unsigned int get_cpei_target_cpu(void)
358 {
359         return acpi_cpei_phys_cpuid;
360 }
361
362 static int __init
363 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
364                        const unsigned long end)
365 {
366         struct acpi_madt_interrupt_override *p;
367
368         p = (struct acpi_madt_interrupt_override *)header;
369
370         if (BAD_MADT_ENTRY(p, end))
371                 return -EINVAL;
372
373         iosapic_override_isa_irq(p->source_irq, p->global_irq,
374                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
375                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
376                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
377                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
378                                  ACPI_MADT_TRIGGER_EDGE) ?
379                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
380         return 0;
381 }
382
383 static int __init
384 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
385 {
386         struct acpi_madt_nmi_source *nmi_src;
387
388         nmi_src = (struct acpi_madt_nmi_source *)header;
389
390         if (BAD_MADT_ENTRY(nmi_src, end))
391                 return -EINVAL;
392
393         /* TBD: Support nimsrc entries */
394         return 0;
395 }
396
397 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
398 {
399         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
400
401                 /*
402                  * Unfortunately ITC_DRIFT is not yet part of the
403                  * official SAL spec, so the ITC_DRIFT bit is not
404                  * set by the BIOS on this hardware.
405                  */
406                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
407
408                 cyclone_setup();
409         }
410 }
411
412 static int __init acpi_parse_madt(struct acpi_table_header *table)
413 {
414         if (!table)
415                 return -EINVAL;
416
417         acpi_madt = (struct acpi_table_madt *)table;
418
419         acpi_madt_rev = acpi_madt->header.revision;
420
421         /* remember the value for reference after free_initmem() */
422 #ifdef CONFIG_ITANIUM
423         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
424 #else
425         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
426 #endif
427         iosapic_system_init(has_8259);
428
429         /* Get base address of IPI Message Block */
430
431         if (acpi_madt->address)
432                 ipi_base_addr = ioremap(acpi_madt->address, 0);
433
434         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
435
436         acpi_madt_oem_check(acpi_madt->header.oem_id,
437                             acpi_madt->header.oem_table_id);
438
439         return 0;
440 }
441
442 #ifdef CONFIG_ACPI_NUMA
443
444 #undef SLIT_DEBUG
445
446 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
447
448 static int __initdata srat_num_cpus;    /* number of cpus */
449 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
450 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
451 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
452 static struct acpi_table_slit __initdata *slit_table;
453 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
454
455 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
456 {
457         int pxm;
458
459         pxm = pa->proximity_domain_lo;
460         if (ia64_platform_is("sn2"))
461                 pxm += pa->proximity_domain_hi[0] << 8;
462         return pxm;
463 }
464
465 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
466 {
467         int pxm;
468
469         pxm = ma->proximity_domain;
470         if (!ia64_platform_is("sn2"))
471                 pxm &= 0xff;
472
473         return pxm;
474 }
475
476 /*
477  * ACPI 2.0 SLIT (System Locality Information Table)
478  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
479  */
480 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
481 {
482         u32 len;
483
484         len = sizeof(struct acpi_table_header) + 8
485             + slit->locality_count * slit->locality_count;
486         if (slit->header.length != len) {
487                 printk(KERN_ERR
488                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
489                        len, slit->header.length);
490                 return;
491         }
492         slit_table = slit;
493 }
494
495 void __init
496 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
497 {
498         int pxm;
499
500         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
501                 return;
502
503         pxm = get_processor_proximity_domain(pa);
504
505         /* record this node in proximity bitmap */
506         pxm_bit_set(pxm);
507
508         node_cpuid[srat_num_cpus].phys_id =
509             (pa->apic_id << 8) | (pa->local_sapic_eid);
510         /* nid should be overridden as logical node id later */
511         node_cpuid[srat_num_cpus].nid = pxm;
512         cpu_set(srat_num_cpus, early_cpu_possible_map);
513         srat_num_cpus++;
514 }
515
516 void __init
517 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
518 {
519         unsigned long paddr, size;
520         int pxm;
521         struct node_memblk_s *p, *q, *pend;
522
523         pxm = get_memory_proximity_domain(ma);
524
525         /* fill node memory chunk structure */
526         paddr = ma->base_address;
527         size = ma->length;
528
529         /* Ignore disabled entries */
530         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
531                 return;
532
533         /* record this node in proximity bitmap */
534         pxm_bit_set(pxm);
535
536         /* Insertion sort based on base address */
537         pend = &node_memblk[num_node_memblks];
538         for (p = &node_memblk[0]; p < pend; p++) {
539                 if (paddr < p->start_paddr)
540                         break;
541         }
542         if (p < pend) {
543                 for (q = pend - 1; q >= p; q--)
544                         *(q + 1) = *q;
545         }
546         p->start_paddr = paddr;
547         p->size = size;
548         p->nid = pxm;
549         num_node_memblks++;
550 }
551
552 void __init acpi_numa_arch_fixup(void)
553 {
554         int i, j, node_from, node_to;
555
556         /* If there's no SRAT, fix the phys_id and mark node 0 online */
557         if (srat_num_cpus == 0) {
558                 node_set_online(0);
559                 node_cpuid[0].phys_id = hard_smp_processor_id();
560                 return;
561         }
562
563         /*
564          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
565          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
566          */
567         nodes_clear(node_online_map);
568         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
569                 if (pxm_bit_test(i)) {
570                         int nid = acpi_map_pxm_to_node(i);
571                         node_set_online(nid);
572                 }
573         }
574
575         /* set logical node id in memory chunk structure */
576         for (i = 0; i < num_node_memblks; i++)
577                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
578
579         /* assign memory bank numbers for each chunk on each node */
580         for_each_online_node(i) {
581                 int bank;
582
583                 bank = 0;
584                 for (j = 0; j < num_node_memblks; j++)
585                         if (node_memblk[j].nid == i)
586                                 node_memblk[j].bank = bank++;
587         }
588
589         /* set logical node id in cpu structure */
590         for_each_possible_early_cpu(i)
591                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
592
593         printk(KERN_INFO "Number of logical nodes in system = %d\n",
594                num_online_nodes());
595         printk(KERN_INFO "Number of memory chunks in system = %d\n",
596                num_node_memblks);
597
598         if (!slit_table) {
599                 for (i = 0; i < MAX_NUMNODES; i++)
600                         for (j = 0; j < MAX_NUMNODES; j++)
601                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
602                                                         REMOTE_DISTANCE;
603                 return;
604         }
605
606         memset(numa_slit, -1, sizeof(numa_slit));
607         for (i = 0; i < slit_table->locality_count; i++) {
608                 if (!pxm_bit_test(i))
609                         continue;
610                 node_from = pxm_to_node(i);
611                 for (j = 0; j < slit_table->locality_count; j++) {
612                         if (!pxm_bit_test(j))
613                                 continue;
614                         node_to = pxm_to_node(j);
615                         node_distance(node_from, node_to) =
616                             slit_table->entry[i * slit_table->locality_count + j];
617                 }
618         }
619
620 #ifdef SLIT_DEBUG
621         printk("ACPI 2.0 SLIT locality table:\n");
622         for_each_online_node(i) {
623                 for_each_online_node(j)
624                     printk("%03d ", node_distance(i, j));
625                 printk("\n");
626         }
627 #endif
628 }
629 #endif                          /* CONFIG_ACPI_NUMA */
630
631 /*
632  * success: return IRQ number (>=0)
633  * failure: return < 0
634  */
635 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
636 {
637         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
638                 return gsi;
639
640         if (has_8259 && gsi < 16)
641                 return isa_irq_to_vector(gsi);
642
643         return iosapic_register_intr(gsi,
644                                      (polarity ==
645                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
646                                      IOSAPIC_POL_LOW,
647                                      (triggering ==
648                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
649                                      IOSAPIC_LEVEL);
650 }
651
652 void acpi_unregister_gsi(u32 gsi)
653 {
654         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
655                 return;
656
657         if (has_8259 && gsi < 16)
658                 return;
659
660         iosapic_unregister_intr(gsi);
661 }
662
663 static int __init acpi_parse_fadt(struct acpi_table_header *table)
664 {
665         struct acpi_table_header *fadt_header;
666         struct acpi_table_fadt *fadt;
667
668         if (!table)
669                 return -EINVAL;
670
671         fadt_header = (struct acpi_table_header *)table;
672         if (fadt_header->revision != 3)
673                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
674
675         fadt = (struct acpi_table_fadt *)fadt_header;
676
677         acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
678         return 0;
679 }
680
681 int __init early_acpi_boot_init(void)
682 {
683         int ret;
684
685         /*
686          * do a partial walk of MADT to determine how many CPUs
687          * we have including offline CPUs
688          */
689         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
690                 printk(KERN_ERR PREFIX "Can't find MADT\n");
691                 return 0;
692         }
693
694         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
695                 acpi_parse_lsapic, NR_CPUS);
696         if (ret < 1)
697                 printk(KERN_ERR PREFIX
698                        "Error parsing MADT - no LAPIC entries\n");
699
700         return 0;
701 }
702
703
704
705 int __init acpi_boot_init(void)
706 {
707
708         /*
709          * MADT
710          * ----
711          * Parse the Multiple APIC Description Table (MADT), if exists.
712          * Note that this table provides platform SMP configuration
713          * information -- the successor to MPS tables.
714          */
715
716         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
717                 printk(KERN_ERR PREFIX "Can't find MADT\n");
718                 goto skip_madt;
719         }
720
721         /* Local APIC */
722
723         if (acpi_table_parse_madt
724             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
725                 printk(KERN_ERR PREFIX
726                        "Error parsing LAPIC address override entry\n");
727
728         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
729             < 0)
730                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
731
732         /* I/O APIC */
733
734         if (acpi_table_parse_madt
735             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
736                 if (!ia64_platform_is("sn2"))
737                         printk(KERN_ERR PREFIX
738                                "Error parsing MADT - no IOSAPIC entries\n");
739         }
740
741         /* System-Level Interrupt Routing */
742
743         if (acpi_table_parse_madt
744             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
745              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
746                 printk(KERN_ERR PREFIX
747                        "Error parsing platform interrupt source entry\n");
748
749         if (acpi_table_parse_madt
750             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
751                 printk(KERN_ERR PREFIX
752                        "Error parsing interrupt source overrides entry\n");
753
754         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
755                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
756       skip_madt:
757
758         /*
759          * FADT says whether a legacy keyboard controller is present.
760          * The FADT also contains an SCI_INT line, by which the system
761          * gets interrupts such as power and sleep buttons.  If it's not
762          * on a Legacy interrupt, it needs to be setup.
763          */
764         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
765                 printk(KERN_ERR PREFIX "Can't find FADT\n");
766
767 #ifdef CONFIG_SMP
768         if (available_cpus == 0) {
769                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
770                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
771                 smp_boot_data.cpu_phys_id[available_cpus] =
772                     hard_smp_processor_id();
773                 available_cpus = 1;     /* We've got at least one of these, no? */
774         }
775         smp_boot_data.cpu_count = available_cpus;
776
777         smp_build_cpu_map();
778 # ifdef CONFIG_ACPI_NUMA
779         if (srat_num_cpus == 0) {
780                 int cpu, i = 1;
781                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
782                         if (smp_boot_data.cpu_phys_id[cpu] !=
783                             hard_smp_processor_id())
784                                 node_cpuid[i++].phys_id =
785                                     smp_boot_data.cpu_phys_id[cpu];
786         }
787 # endif
788 #endif
789 #ifdef CONFIG_ACPI_NUMA
790         build_cpu_to_node_map();
791 #endif
792         /* Make boot-up look pretty */
793         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
794                total_cpus);
795         return 0;
796 }
797
798 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
799 {
800         int tmp;
801
802         if (has_8259 && gsi < 16)
803                 *irq = isa_irq_to_vector(gsi);
804         else {
805                 tmp = gsi_to_irq(gsi);
806                 if (tmp == -1)
807                         return -1;
808                 *irq = tmp;
809         }
810         return 0;
811 }
812
813 /*
814  *  ACPI based hotplug CPU support
815  */
816 #ifdef CONFIG_ACPI_HOTPLUG_CPU
817 static
818 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
819 {
820 #ifdef CONFIG_ACPI_NUMA
821         int pxm_id;
822         int nid;
823
824         pxm_id = acpi_get_pxm(handle);
825         /*
826          * We don't have cpu-only-node hotadd. But if the system equips
827          * SRAT table, pxm is already found and node is ready.
828          * So, just pxm_to_nid(pxm) is OK.
829          * This code here is for the system which doesn't have full SRAT
830          * table for possible cpus.
831          */
832         nid = acpi_map_pxm_to_node(pxm_id);
833         node_cpuid[cpu].phys_id = physid;
834         node_cpuid[cpu].nid = nid;
835 #endif
836         return (0);
837 }
838
839 int additional_cpus __initdata = -1;
840
841 static __init int setup_additional_cpus(char *s)
842 {
843         if (s)
844                 additional_cpus = simple_strtol(s, NULL, 0);
845
846         return 0;
847 }
848
849 early_param("additional_cpus", setup_additional_cpus);
850
851 /*
852  * cpu_possible_map should be static, it cannot change as CPUs
853  * are onlined, or offlined. The reason is per-cpu data-structures
854  * are allocated by some modules at init time, and dont expect to
855  * do this dynamically on cpu arrival/departure.
856  * cpu_present_map on the other hand can change dynamically.
857  * In case when cpu_hotplug is not compiled, then we resort to current
858  * behaviour, which is cpu_possible == cpu_present.
859  * - Ashok Raj
860  *
861  * Three ways to find out the number of additional hotplug CPUs:
862  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
863  * - The user can overwrite it with additional_cpus=NUM
864  * - Otherwise don't reserve additional CPUs.
865  */
866 __init void prefill_possible_map(void)
867 {
868         int i;
869         int possible, disabled_cpus;
870
871         disabled_cpus = total_cpus - available_cpus;
872
873         if (additional_cpus == -1) {
874                 if (disabled_cpus > 0)
875                         additional_cpus = disabled_cpus;
876                 else
877                         additional_cpus = 0;
878         }
879
880         possible = available_cpus + additional_cpus;
881
882         if (possible > NR_CPUS)
883                 possible = NR_CPUS;
884
885         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
886                 possible, max((possible - available_cpus), 0));
887
888         for (i = 0; i < possible; i++)
889                 cpu_set(i, cpu_possible_map);
890 }
891
892 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
893 {
894         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
895         union acpi_object *obj;
896         struct acpi_madt_local_sapic *lsapic;
897         cpumask_t tmp_map;
898         int cpu, physid;
899
900         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
901                 return -EINVAL;
902
903         if (!buffer.length || !buffer.pointer)
904                 return -EINVAL;
905
906         obj = buffer.pointer;
907         if (obj->type != ACPI_TYPE_BUFFER)
908         {
909                 kfree(buffer.pointer);
910                 return -EINVAL;
911         }
912
913         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
914
915         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
916             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
917                 kfree(buffer.pointer);
918                 return -EINVAL;
919         }
920
921         physid = ((lsapic->id << 8) | (lsapic->eid));
922
923         kfree(buffer.pointer);
924         buffer.length = ACPI_ALLOCATE_BUFFER;
925         buffer.pointer = NULL;
926
927         cpus_complement(tmp_map, cpu_present_map);
928         cpu = first_cpu(tmp_map);
929         if (cpu >= NR_CPUS)
930                 return -EINVAL;
931
932         acpi_map_cpu2node(handle, cpu, physid);
933
934         cpu_set(cpu, cpu_present_map);
935         ia64_cpu_to_sapicid[cpu] = physid;
936
937         *pcpu = cpu;
938         return (0);
939 }
940
941 EXPORT_SYMBOL(acpi_map_lsapic);
942
943 int acpi_unmap_lsapic(int cpu)
944 {
945         ia64_cpu_to_sapicid[cpu] = -1;
946         cpu_clear(cpu, cpu_present_map);
947
948 #ifdef CONFIG_ACPI_NUMA
949         /* NUMA specific cleanup's */
950 #endif
951
952         return (0);
953 }
954
955 EXPORT_SYMBOL(acpi_unmap_lsapic);
956 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
957
958 #ifdef CONFIG_ACPI_NUMA
959 static acpi_status __devinit
960 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
961 {
962         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
963         union acpi_object *obj;
964         struct acpi_madt_io_sapic *iosapic;
965         unsigned int gsi_base;
966         int pxm, node;
967
968         /* Only care about objects w/ a method that returns the MADT */
969         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
970                 return AE_OK;
971
972         if (!buffer.length || !buffer.pointer)
973                 return AE_OK;
974
975         obj = buffer.pointer;
976         if (obj->type != ACPI_TYPE_BUFFER ||
977             obj->buffer.length < sizeof(*iosapic)) {
978                 kfree(buffer.pointer);
979                 return AE_OK;
980         }
981
982         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
983
984         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
985                 kfree(buffer.pointer);
986                 return AE_OK;
987         }
988
989         gsi_base = iosapic->global_irq_base;
990
991         kfree(buffer.pointer);
992
993         /*
994          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
995          * us which node to associate this with.
996          */
997         pxm = acpi_get_pxm(handle);
998         if (pxm < 0)
999                 return AE_OK;
1000
1001         node = pxm_to_node(pxm);
1002
1003         if (node >= MAX_NUMNODES || !node_online(node) ||
1004             cpumask_empty(cpumask_of_node(node)))
1005                 return AE_OK;
1006
1007         /* We know a gsi to node mapping! */
1008         map_iosapic_to_node(gsi_base, node);
1009         return AE_OK;
1010 }
1011
1012 static int __init
1013 acpi_map_iosapics (void)
1014 {
1015         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1016         return 0;
1017 }
1018
1019 fs_initcall(acpi_map_iosapics);
1020 #endif                          /* CONFIG_ACPI_NUMA */
1021
1022 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1023 {
1024         int err;
1025
1026         if ((err = iosapic_init(phys_addr, gsi_base)))
1027                 return err;
1028
1029 #ifdef CONFIG_ACPI_NUMA
1030         acpi_map_iosapic(handle, 0, NULL, NULL);
1031 #endif                          /* CONFIG_ACPI_NUMA */
1032
1033         return 0;
1034 }
1035
1036 EXPORT_SYMBOL(acpi_register_ioapic);
1037
1038 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1039 {
1040         return iosapic_remove(gsi_base);
1041 }
1042
1043 EXPORT_SYMBOL(acpi_unregister_ioapic);
1044
1045 /*
1046  * acpi_save_state_mem() - save kernel state
1047  *
1048  * TBD when when IA64 starts to support suspend...
1049  */
1050 int acpi_save_state_mem(void) { return 0; } 
1051
1052 /*
1053  * acpi_restore_state()
1054  */
1055 void acpi_restore_state_mem(void) {}
1056
1057 /*
1058  * do_suspend_lowlevel()
1059  */
1060 void do_suspend_lowlevel(void) {}
1061
1062 #endif                          /* CONFIG_ACPI */