fe1d90b0c6eaaab91be6de32342c02bc507a6c12
[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/config.h>
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/kernel.h>
39 #include <linux/sched.h>
40 #include <linux/smp.h>
41 #include <linux/string.h>
42 #include <linux/types.h>
43 #include <linux/irq.h>
44 #include <linux/acpi.h>
45 #include <linux/efi.h>
46 #include <linux/mmzone.h>
47 #include <linux/nodemask.h>
48 #include <asm/io.h>
49 #include <asm/iosapic.h>
50 #include <asm/machvec.h>
51 #include <asm/page.h>
52 #include <asm/system.h>
53 #include <asm/numa.h>
54 #include <asm/sal.h>
55 #include <asm/cyclone.h>
56
57 #define BAD_MADT_ENTRY(entry, end) (                                        \
58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
59                 ((acpi_table_entry_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 unsigned char acpi_kbd_controller_present = 1;
69 unsigned char acpi_legacy_devices;
70
71 static unsigned int __initdata acpi_madt_rev;
72
73 unsigned int acpi_cpei_override;
74 unsigned int acpi_cpei_phys_cpuid;
75
76 #define MAX_SAPICS 256
77 u16 ia64_acpiid_to_sapicid[MAX_SAPICS] = {[0 ... MAX_SAPICS - 1] = -1 };
78
79 EXPORT_SYMBOL(ia64_acpiid_to_sapicid);
80
81 const char *acpi_get_sysname(void)
82 {
83 #ifdef CONFIG_IA64_GENERIC
84         unsigned long rsdp_phys;
85         struct acpi20_table_rsdp *rsdp;
86         struct acpi_table_xsdt *xsdt;
87         struct acpi_table_header *hdr;
88
89         rsdp_phys = acpi_find_rsdp();
90         if (!rsdp_phys) {
91                 printk(KERN_ERR
92                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
93                 return "dig";
94         }
95
96         rsdp = (struct acpi20_table_rsdp *)__va(rsdp_phys);
97         if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
98                 printk(KERN_ERR
99                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
100                 return "dig";
101         }
102
103         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_address);
104         hdr = &xsdt->header;
105         if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
106                 printk(KERN_ERR
107                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
108                 return "dig";
109         }
110
111         if (!strcmp(hdr->oem_id, "HP")) {
112                 return "hpzx1";
113         } else if (!strcmp(hdr->oem_id, "SGI")) {
114                 return "sn2";
115         }
116
117         return "dig";
118 #else
119 # if defined (CONFIG_IA64_HP_SIM)
120         return "hpsim";
121 # elif defined (CONFIG_IA64_HP_ZX1)
122         return "hpzx1";
123 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
124         return "hpzx1_swiotlb";
125 # elif defined (CONFIG_IA64_SGI_SN2)
126         return "sn2";
127 # elif defined (CONFIG_IA64_DIG)
128         return "dig";
129 # else
130 #       error Unknown platform.  Fix acpi.c.
131 # endif
132 #endif
133 }
134
135 #ifdef CONFIG_ACPI
136
137 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
138
139 /* Array to record platform interrupt vectors for generic interrupt routing. */
140 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
141         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
142 };
143
144 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
145
146 /*
147  * Interrupt routing API for device drivers.  Provides interrupt vector for
148  * a generic platform event.  Currently only CPEI is implemented.
149  */
150 int acpi_request_vector(u32 int_type)
151 {
152         int vector = -1;
153
154         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
155                 /* corrected platform error interrupt */
156                 vector = platform_intr_list[int_type];
157         } else
158                 printk(KERN_ERR
159                        "acpi_request_vector(): invalid interrupt type\n");
160         return vector;
161 }
162
163 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
164 {
165         return __va(phys_addr);
166 }
167
168 /* --------------------------------------------------------------------------
169                             Boot-time Table Parsing
170    -------------------------------------------------------------------------- */
171
172 static int total_cpus __initdata;
173 static int available_cpus __initdata;
174 struct acpi_table_madt *acpi_madt __initdata;
175 static u8 has_8259;
176
177 static int __init
178 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
179                           const unsigned long end)
180 {
181         struct acpi_table_lapic_addr_ovr *lapic;
182
183         lapic = (struct acpi_table_lapic_addr_ovr *)header;
184
185         if (BAD_MADT_ENTRY(lapic, end))
186                 return -EINVAL;
187
188         if (lapic->address) {
189                 iounmap(ipi_base_addr);
190                 ipi_base_addr = ioremap(lapic->address, 0);
191         }
192         return 0;
193 }
194
195 static int __init
196 acpi_parse_lsapic(acpi_table_entry_header * header, const unsigned long end)
197 {
198         struct acpi_table_lsapic *lsapic;
199
200         lsapic = (struct acpi_table_lsapic *)header;
201
202         if (BAD_MADT_ENTRY(lsapic, end))
203                 return -EINVAL;
204
205         if (lsapic->flags.enabled) {
206 #ifdef CONFIG_SMP
207                 smp_boot_data.cpu_phys_id[available_cpus] =
208                     (lsapic->id << 8) | lsapic->eid;
209 #endif
210                 ia64_acpiid_to_sapicid[lsapic->acpi_id] =
211                     (lsapic->id << 8) | lsapic->eid;
212                 ++available_cpus;
213         }
214
215         total_cpus++;
216         return 0;
217 }
218
219 static int __init
220 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
221 {
222         struct acpi_table_lapic_nmi *lacpi_nmi;
223
224         lacpi_nmi = (struct acpi_table_lapic_nmi *)header;
225
226         if (BAD_MADT_ENTRY(lacpi_nmi, end))
227                 return -EINVAL;
228
229         /* TBD: Support lapic_nmi entries */
230         return 0;
231 }
232
233 static int __init
234 acpi_parse_iosapic(acpi_table_entry_header * header, const unsigned long end)
235 {
236         struct acpi_table_iosapic *iosapic;
237
238         iosapic = (struct acpi_table_iosapic *)header;
239
240         if (BAD_MADT_ENTRY(iosapic, end))
241                 return -EINVAL;
242
243         return iosapic_init(iosapic->address, iosapic->global_irq_base);
244 }
245
246 static int __init
247 acpi_parse_plat_int_src(acpi_table_entry_header * header,
248                         const unsigned long end)
249 {
250         struct acpi_table_plat_int_src *plintsrc;
251         int vector;
252
253         plintsrc = (struct acpi_table_plat_int_src *)header;
254
255         if (BAD_MADT_ENTRY(plintsrc, end))
256                 return -EINVAL;
257
258         /*
259          * Get vector assignment for this interrupt, set attributes,
260          * and program the IOSAPIC routing table.
261          */
262         vector = iosapic_register_platform_intr(plintsrc->type,
263                                                 plintsrc->global_irq,
264                                                 plintsrc->iosapic_vector,
265                                                 plintsrc->eid,
266                                                 plintsrc->id,
267                                                 (plintsrc->flags.polarity ==
268                                                  1) ? IOSAPIC_POL_HIGH :
269                                                 IOSAPIC_POL_LOW,
270                                                 (plintsrc->flags.trigger ==
271                                                  1) ? IOSAPIC_EDGE :
272                                                 IOSAPIC_LEVEL);
273
274         platform_intr_list[plintsrc->type] = vector;
275         if (acpi_madt_rev > 1) {
276                 acpi_cpei_override = plintsrc->plint_flags.cpei_override_flag;
277         }
278
279         /*
280          * Save the physical id, so we can check when its being removed
281          */
282         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
283
284         return 0;
285 }
286
287 unsigned int can_cpei_retarget(void)
288 {
289         extern int cpe_vector;
290         extern unsigned int force_cpei_retarget;
291
292         /*
293          * Only if CPEI is supported and the override flag
294          * is present, otherwise return that its re-targettable
295          * if we are in polling mode.
296          */
297         if (cpe_vector > 0) {
298                 if (acpi_cpei_override || force_cpei_retarget)
299                         return 1;
300                 else
301                         return 0;
302         }
303         return 1;
304 }
305
306 unsigned int is_cpu_cpei_target(unsigned int cpu)
307 {
308         unsigned int logical_id;
309
310         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
311
312         if (logical_id == cpu)
313                 return 1;
314         else
315                 return 0;
316 }
317
318 void set_cpei_target_cpu(unsigned int cpu)
319 {
320         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
321 }
322
323 unsigned int get_cpei_target_cpu(void)
324 {
325         return acpi_cpei_phys_cpuid;
326 }
327
328 static int __init
329 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
330                        const unsigned long end)
331 {
332         struct acpi_table_int_src_ovr *p;
333
334         p = (struct acpi_table_int_src_ovr *)header;
335
336         if (BAD_MADT_ENTRY(p, end))
337                 return -EINVAL;
338
339         iosapic_override_isa_irq(p->bus_irq, p->global_irq,
340                                  (p->flags.polarity ==
341                                   1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
342                                  (p->flags.trigger ==
343                                   1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
344         return 0;
345 }
346
347 static int __init
348 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
349 {
350         struct acpi_table_nmi_src *nmi_src;
351
352         nmi_src = (struct acpi_table_nmi_src *)header;
353
354         if (BAD_MADT_ENTRY(nmi_src, end))
355                 return -EINVAL;
356
357         /* TBD: Support nimsrc entries */
358         return 0;
359 }
360
361 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
362 {
363         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
364
365                 /*
366                  * Unfortunately ITC_DRIFT is not yet part of the
367                  * official SAL spec, so the ITC_DRIFT bit is not
368                  * set by the BIOS on this hardware.
369                  */
370                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
371
372                 cyclone_setup();
373         }
374 }
375
376 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
377 {
378         if (!phys_addr || !size)
379                 return -EINVAL;
380
381         acpi_madt = (struct acpi_table_madt *)__va(phys_addr);
382
383         acpi_madt_rev = acpi_madt->header.revision;
384
385         /* remember the value for reference after free_initmem() */
386 #ifdef CONFIG_ITANIUM
387         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
388 #else
389         has_8259 = acpi_madt->flags.pcat_compat;
390 #endif
391         iosapic_system_init(has_8259);
392
393         /* Get base address of IPI Message Block */
394
395         if (acpi_madt->lapic_address)
396                 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
397
398         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
399
400         acpi_madt_oem_check(acpi_madt->header.oem_id,
401                             acpi_madt->header.oem_table_id);
402
403         return 0;
404 }
405
406 #ifdef CONFIG_ACPI_NUMA
407
408 #undef SLIT_DEBUG
409
410 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
411
412 static int __initdata srat_num_cpus;    /* number of cpus */
413 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
414 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
415 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
416 /* maps to convert between proximity domain and logical node ID */
417 int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
418 int __initdata nid_to_pxm_map[MAX_NUMNODES];
419 static struct acpi_table_slit __initdata *slit_table;
420
421 /*
422  * ACPI 2.0 SLIT (System Locality Information Table)
423  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
424  */
425 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
426 {
427         u32 len;
428
429         len = sizeof(struct acpi_table_header) + 8
430             + slit->localities * slit->localities;
431         if (slit->header.length != len) {
432                 printk(KERN_ERR
433                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
434                        len, slit->header.length);
435                 memset(numa_slit, 10, sizeof(numa_slit));
436                 return;
437         }
438         slit_table = slit;
439 }
440
441 void __init
442 acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa)
443 {
444         /* record this node in proximity bitmap */
445         pxm_bit_set(pa->proximity_domain);
446
447         node_cpuid[srat_num_cpus].phys_id =
448             (pa->apic_id << 8) | (pa->lsapic_eid);
449         /* nid should be overridden as logical node id later */
450         node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
451         srat_num_cpus++;
452 }
453
454 void __init
455 acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
456 {
457         unsigned long paddr, size;
458         u8 pxm;
459         struct node_memblk_s *p, *q, *pend;
460
461         pxm = ma->proximity_domain;
462
463         /* fill node memory chunk structure */
464         paddr = ma->base_addr_hi;
465         paddr = (paddr << 32) | ma->base_addr_lo;
466         size = ma->length_hi;
467         size = (size << 32) | ma->length_lo;
468
469         /* Ignore disabled entries */
470         if (!ma->flags.enabled)
471                 return;
472
473         /* record this node in proximity bitmap */
474         pxm_bit_set(pxm);
475
476         /* Insertion sort based on base address */
477         pend = &node_memblk[num_node_memblks];
478         for (p = &node_memblk[0]; p < pend; p++) {
479                 if (paddr < p->start_paddr)
480                         break;
481         }
482         if (p < pend) {
483                 for (q = pend - 1; q >= p; q--)
484                         *(q + 1) = *q;
485         }
486         p->start_paddr = paddr;
487         p->size = size;
488         p->nid = pxm;
489         num_node_memblks++;
490 }
491
492 void __init acpi_numa_arch_fixup(void)
493 {
494         int i, j, node_from, node_to;
495
496         /* If there's no SRAT, fix the phys_id and mark node 0 online */
497         if (srat_num_cpus == 0) {
498                 node_set_online(0);
499                 node_cpuid[0].phys_id = hard_smp_processor_id();
500                 return;
501         }
502
503         /*
504          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
505          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
506          */
507         /* calculate total number of nodes in system from PXM bitmap */
508         memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
509         memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
510         nodes_clear(node_online_map);
511         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
512                 if (pxm_bit_test(i)) {
513                         int nid = num_online_nodes();
514                         pxm_to_nid_map[i] = nid;
515                         nid_to_pxm_map[nid] = i;
516                         node_set_online(nid);
517                 }
518         }
519
520         /* set logical node id in memory chunk structure */
521         for (i = 0; i < num_node_memblks; i++)
522                 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
523
524         /* assign memory bank numbers for each chunk on each node */
525         for_each_online_node(i) {
526                 int bank;
527
528                 bank = 0;
529                 for (j = 0; j < num_node_memblks; j++)
530                         if (node_memblk[j].nid == i)
531                                 node_memblk[j].bank = bank++;
532         }
533
534         /* set logical node id in cpu structure */
535         for (i = 0; i < srat_num_cpus; i++)
536                 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
537
538         printk(KERN_INFO "Number of logical nodes in system = %d\n",
539                num_online_nodes());
540         printk(KERN_INFO "Number of memory chunks in system = %d\n",
541                num_node_memblks);
542
543         if (!slit_table)
544                 return;
545         memset(numa_slit, -1, sizeof(numa_slit));
546         for (i = 0; i < slit_table->localities; i++) {
547                 if (!pxm_bit_test(i))
548                         continue;
549                 node_from = pxm_to_nid_map[i];
550                 for (j = 0; j < slit_table->localities; j++) {
551                         if (!pxm_bit_test(j))
552                                 continue;
553                         node_to = pxm_to_nid_map[j];
554                         node_distance(node_from, node_to) =
555                             slit_table->entry[i * slit_table->localities + j];
556                 }
557         }
558
559 #ifdef SLIT_DEBUG
560         printk("ACPI 2.0 SLIT locality table:\n");
561         for_each_online_node(i) {
562                 for_each_online_node(j)
563                     printk("%03d ", node_distance(i, j));
564                 printk("\n");
565         }
566 #endif
567 }
568 #endif                          /* CONFIG_ACPI_NUMA */
569
570 /*
571  * success: return IRQ number (>=0)
572  * failure: return < 0
573  */
574 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
575 {
576         if (has_8259 && gsi < 16)
577                 return isa_irq_to_vector(gsi);
578
579         return iosapic_register_intr(gsi,
580                                      (active_high_low ==
581                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
582                                      IOSAPIC_POL_LOW,
583                                      (edge_level ==
584                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
585                                      IOSAPIC_LEVEL);
586 }
587
588 EXPORT_SYMBOL(acpi_register_gsi);
589
590 void acpi_unregister_gsi(u32 gsi)
591 {
592         iosapic_unregister_intr(gsi);
593 }
594
595 EXPORT_SYMBOL(acpi_unregister_gsi);
596
597 static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size)
598 {
599         struct acpi_table_header *fadt_header;
600         struct fadt_descriptor_rev2 *fadt;
601
602         if (!phys_addr || !size)
603                 return -EINVAL;
604
605         fadt_header = (struct acpi_table_header *)__va(phys_addr);
606         if (fadt_header->revision != 3)
607                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
608
609         fadt = (struct fadt_descriptor_rev2 *)fadt_header;
610
611         if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
612                 acpi_kbd_controller_present = 0;
613
614         if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
615                 acpi_legacy_devices = 1;
616
617         acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
618         return 0;
619 }
620
621 unsigned long __init acpi_find_rsdp(void)
622 {
623         unsigned long rsdp_phys = 0;
624
625         if (efi.acpi20)
626                 rsdp_phys = __pa(efi.acpi20);
627         else if (efi.acpi)
628                 printk(KERN_WARNING PREFIX
629                        "v1.0/r0.71 tables no longer supported\n");
630         return rsdp_phys;
631 }
632
633 int __init acpi_boot_init(void)
634 {
635
636         /*
637          * MADT
638          * ----
639          * Parse the Multiple APIC Description Table (MADT), if exists.
640          * Note that this table provides platform SMP configuration
641          * information -- the successor to MPS tables.
642          */
643
644         if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
645                 printk(KERN_ERR PREFIX "Can't find MADT\n");
646                 goto skip_madt;
647         }
648
649         /* Local APIC */
650
651         if (acpi_table_parse_madt
652             (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
653                 printk(KERN_ERR PREFIX
654                        "Error parsing LAPIC address override entry\n");
655
656         if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS)
657             < 1)
658                 printk(KERN_ERR PREFIX
659                        "Error parsing MADT - no LAPIC entries\n");
660
661         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0)
662             < 0)
663                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
664
665         /* I/O APIC */
666
667         if (acpi_table_parse_madt
668             (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
669                 printk(KERN_ERR PREFIX
670                        "Error parsing MADT - no IOSAPIC entries\n");
671
672         /* System-Level Interrupt Routing */
673
674         if (acpi_table_parse_madt
675             (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src,
676              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
677                 printk(KERN_ERR PREFIX
678                        "Error parsing platform interrupt source entry\n");
679
680         if (acpi_table_parse_madt
681             (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
682                 printk(KERN_ERR PREFIX
683                        "Error parsing interrupt source overrides entry\n");
684
685         if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
686                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
687       skip_madt:
688
689         /*
690          * FADT says whether a legacy keyboard controller is present.
691          * The FADT also contains an SCI_INT line, by which the system
692          * gets interrupts such as power and sleep buttons.  If it's not
693          * on a Legacy interrupt, it needs to be setup.
694          */
695         if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
696                 printk(KERN_ERR PREFIX "Can't find FADT\n");
697
698 #ifdef CONFIG_SMP
699         if (available_cpus == 0) {
700                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
701                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
702                 smp_boot_data.cpu_phys_id[available_cpus] =
703                     hard_smp_processor_id();
704                 available_cpus = 1;     /* We've got at least one of these, no? */
705         }
706         smp_boot_data.cpu_count = available_cpus;
707
708         smp_build_cpu_map();
709 # ifdef CONFIG_ACPI_NUMA
710         if (srat_num_cpus == 0) {
711                 int cpu, i = 1;
712                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
713                         if (smp_boot_data.cpu_phys_id[cpu] !=
714                             hard_smp_processor_id())
715                                 node_cpuid[i++].phys_id =
716                                     smp_boot_data.cpu_phys_id[cpu];
717         }
718 # endif
719 #endif
720 #ifdef CONFIG_ACPI_NUMA
721         build_cpu_to_node_map();
722 #endif
723         /* Make boot-up look pretty */
724         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
725                total_cpus);
726         return 0;
727 }
728
729 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
730 {
731         int vector;
732
733         if (has_8259 && gsi < 16)
734                 *irq = isa_irq_to_vector(gsi);
735         else {
736                 vector = gsi_to_vector(gsi);
737                 if (vector == -1)
738                         return -1;
739
740                 *irq = vector;
741         }
742         return 0;
743 }
744
745 /*
746  *  ACPI based hotplug CPU support
747  */
748 #ifdef CONFIG_ACPI_HOTPLUG_CPU
749 static
750 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
751 {
752 #ifdef CONFIG_ACPI_NUMA
753         int pxm_id;
754
755         pxm_id = acpi_get_pxm(handle);
756
757         /*
758          * Assuming that the container driver would have set the proximity
759          * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag
760          */
761         node_cpuid[cpu].nid = (pxm_id < 0) ? 0 : pxm_to_nid_map[pxm_id];
762
763         node_cpuid[cpu].phys_id = physid;
764 #endif
765         return (0);
766 }
767
768 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
769 {
770         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
771         union acpi_object *obj;
772         struct acpi_table_lsapic *lsapic;
773         cpumask_t tmp_map;
774         long physid;
775         int cpu;
776
777         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
778                 return -EINVAL;
779
780         if (!buffer.length || !buffer.pointer)
781                 return -EINVAL;
782
783         obj = buffer.pointer;
784         if (obj->type != ACPI_TYPE_BUFFER ||
785             obj->buffer.length < sizeof(*lsapic)) {
786                 acpi_os_free(buffer.pointer);
787                 return -EINVAL;
788         }
789
790         lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
791
792         if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
793             (!lsapic->flags.enabled)) {
794                 acpi_os_free(buffer.pointer);
795                 return -EINVAL;
796         }
797
798         physid = ((lsapic->id << 8) | (lsapic->eid));
799
800         acpi_os_free(buffer.pointer);
801         buffer.length = ACPI_ALLOCATE_BUFFER;
802         buffer.pointer = NULL;
803
804         cpus_complement(tmp_map, cpu_present_map);
805         cpu = first_cpu(tmp_map);
806         if (cpu >= NR_CPUS)
807                 return -EINVAL;
808
809         acpi_map_cpu2node(handle, cpu, physid);
810
811         cpu_set(cpu, cpu_present_map);
812         ia64_cpu_to_sapicid[cpu] = physid;
813         ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu];
814
815         *pcpu = cpu;
816         return (0);
817 }
818
819 EXPORT_SYMBOL(acpi_map_lsapic);
820
821 int acpi_unmap_lsapic(int cpu)
822 {
823         int i;
824
825         for (i = 0; i < MAX_SAPICS; i++) {
826                 if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) {
827                         ia64_acpiid_to_sapicid[i] = -1;
828                         break;
829                 }
830         }
831         ia64_cpu_to_sapicid[cpu] = -1;
832         cpu_clear(cpu, cpu_present_map);
833
834 #ifdef CONFIG_ACPI_NUMA
835         /* NUMA specific cleanup's */
836 #endif
837
838         return (0);
839 }
840
841 EXPORT_SYMBOL(acpi_unmap_lsapic);
842 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
843
844 #ifdef CONFIG_ACPI_NUMA
845 static acpi_status __devinit
846 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
847 {
848         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
849         union acpi_object *obj;
850         struct acpi_table_iosapic *iosapic;
851         unsigned int gsi_base;
852         int pxm, node;
853
854         /* Only care about objects w/ a method that returns the MADT */
855         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
856                 return AE_OK;
857
858         if (!buffer.length || !buffer.pointer)
859                 return AE_OK;
860
861         obj = buffer.pointer;
862         if (obj->type != ACPI_TYPE_BUFFER ||
863             obj->buffer.length < sizeof(*iosapic)) {
864                 acpi_os_free(buffer.pointer);
865                 return AE_OK;
866         }
867
868         iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
869
870         if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
871                 acpi_os_free(buffer.pointer);
872                 return AE_OK;
873         }
874
875         gsi_base = iosapic->global_irq_base;
876
877         acpi_os_free(buffer.pointer);
878
879         /*
880          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
881          * us which node to associate this with.
882          */
883         pxm = acpi_get_pxm(handle);
884         if (pxm < 0)
885                 return AE_OK;
886
887         node = pxm_to_nid_map[pxm];
888
889         if (node >= MAX_NUMNODES || !node_online(node) ||
890             cpus_empty(node_to_cpumask(node)))
891                 return AE_OK;
892
893         /* We know a gsi to node mapping! */
894         map_iosapic_to_node(gsi_base, node);
895         return AE_OK;
896 }
897
898 static int __init
899 acpi_map_iosapics (void)
900 {
901         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
902         return 0;
903 }
904
905 fs_initcall(acpi_map_iosapics);
906 #endif                          /* CONFIG_ACPI_NUMA */
907
908 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
909 {
910         int err;
911
912         if ((err = iosapic_init(phys_addr, gsi_base)))
913                 return err;
914
915 #ifdef CONFIG_ACPI_NUMA
916         acpi_map_iosapic(handle, 0, NULL, NULL);
917 #endif                          /* CONFIG_ACPI_NUMA */
918
919         return 0;
920 }
921
922 EXPORT_SYMBOL(acpi_register_ioapic);
923
924 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
925 {
926         return iosapic_remove(gsi_base);
927 }
928
929 EXPORT_SYMBOL(acpi_unregister_ioapic);
930
931 #endif                          /* CONFIG_ACPI */