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