[IA64] Fix UP build with BSP removal support.
[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 #ifdef CONFIG_HOTPLUG_CPU
288 unsigned int can_cpei_retarget(void)
289 {
290         extern int cpe_vector;
291         extern unsigned int force_cpei_retarget;
292
293         /*
294          * Only if CPEI is supported and the override flag
295          * is present, otherwise return that its re-targettable
296          * if we are in polling mode.
297          */
298         if (cpe_vector > 0) {
299                 if (acpi_cpei_override || force_cpei_retarget)
300                         return 1;
301                 else
302                         return 0;
303         }
304         return 1;
305 }
306
307 unsigned int is_cpu_cpei_target(unsigned int cpu)
308 {
309         unsigned int logical_id;
310
311         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
312
313         if (logical_id == cpu)
314                 return 1;
315         else
316                 return 0;
317 }
318
319 void set_cpei_target_cpu(unsigned int cpu)
320 {
321         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
322 }
323 #endif
324
325 unsigned int get_cpei_target_cpu(void)
326 {
327         return acpi_cpei_phys_cpuid;
328 }
329
330 static int __init
331 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
332                        const unsigned long end)
333 {
334         struct acpi_table_int_src_ovr *p;
335
336         p = (struct acpi_table_int_src_ovr *)header;
337
338         if (BAD_MADT_ENTRY(p, end))
339                 return -EINVAL;
340
341         iosapic_override_isa_irq(p->bus_irq, p->global_irq,
342                                  (p->flags.polarity ==
343                                   1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
344                                  (p->flags.trigger ==
345                                   1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
346         return 0;
347 }
348
349 static int __init
350 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
351 {
352         struct acpi_table_nmi_src *nmi_src;
353
354         nmi_src = (struct acpi_table_nmi_src *)header;
355
356         if (BAD_MADT_ENTRY(nmi_src, end))
357                 return -EINVAL;
358
359         /* TBD: Support nimsrc entries */
360         return 0;
361 }
362
363 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
364 {
365         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
366
367                 /*
368                  * Unfortunately ITC_DRIFT is not yet part of the
369                  * official SAL spec, so the ITC_DRIFT bit is not
370                  * set by the BIOS on this hardware.
371                  */
372                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
373
374                 cyclone_setup();
375         }
376 }
377
378 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
379 {
380         if (!phys_addr || !size)
381                 return -EINVAL;
382
383         acpi_madt = (struct acpi_table_madt *)__va(phys_addr);
384
385         acpi_madt_rev = acpi_madt->header.revision;
386
387         /* remember the value for reference after free_initmem() */
388 #ifdef CONFIG_ITANIUM
389         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
390 #else
391         has_8259 = acpi_madt->flags.pcat_compat;
392 #endif
393         iosapic_system_init(has_8259);
394
395         /* Get base address of IPI Message Block */
396
397         if (acpi_madt->lapic_address)
398                 ipi_base_addr = ioremap(acpi_madt->lapic_address, 0);
399
400         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
401
402         acpi_madt_oem_check(acpi_madt->header.oem_id,
403                             acpi_madt->header.oem_table_id);
404
405         return 0;
406 }
407
408 #ifdef CONFIG_ACPI_NUMA
409
410 #undef SLIT_DEBUG
411
412 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
413
414 static int __initdata srat_num_cpus;    /* number of cpus */
415 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
416 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
417 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
418 /* maps to convert between proximity domain and logical node ID */
419 int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
420 int __initdata nid_to_pxm_map[MAX_NUMNODES];
421 static struct acpi_table_slit __initdata *slit_table;
422
423 /*
424  * ACPI 2.0 SLIT (System Locality Information Table)
425  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
426  */
427 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
428 {
429         u32 len;
430
431         len = sizeof(struct acpi_table_header) + 8
432             + slit->localities * slit->localities;
433         if (slit->header.length != len) {
434                 printk(KERN_ERR
435                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
436                        len, slit->header.length);
437                 memset(numa_slit, 10, sizeof(numa_slit));
438                 return;
439         }
440         slit_table = slit;
441 }
442
443 void __init
444 acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa)
445 {
446         /* record this node in proximity bitmap */
447         pxm_bit_set(pa->proximity_domain);
448
449         node_cpuid[srat_num_cpus].phys_id =
450             (pa->apic_id << 8) | (pa->lsapic_eid);
451         /* nid should be overridden as logical node id later */
452         node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
453         srat_num_cpus++;
454 }
455
456 void __init
457 acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
458 {
459         unsigned long paddr, size;
460         u8 pxm;
461         struct node_memblk_s *p, *q, *pend;
462
463         pxm = ma->proximity_domain;
464
465         /* fill node memory chunk structure */
466         paddr = ma->base_addr_hi;
467         paddr = (paddr << 32) | ma->base_addr_lo;
468         size = ma->length_hi;
469         size = (size << 32) | ma->length_lo;
470
471         /* Ignore disabled entries */
472         if (!ma->flags.enabled)
473                 return;
474
475         /* record this node in proximity bitmap */
476         pxm_bit_set(pxm);
477
478         /* Insertion sort based on base address */
479         pend = &node_memblk[num_node_memblks];
480         for (p = &node_memblk[0]; p < pend; p++) {
481                 if (paddr < p->start_paddr)
482                         break;
483         }
484         if (p < pend) {
485                 for (q = pend - 1; q >= p; q--)
486                         *(q + 1) = *q;
487         }
488         p->start_paddr = paddr;
489         p->size = size;
490         p->nid = pxm;
491         num_node_memblks++;
492 }
493
494 void __init acpi_numa_arch_fixup(void)
495 {
496         int i, j, node_from, node_to;
497
498         /* If there's no SRAT, fix the phys_id and mark node 0 online */
499         if (srat_num_cpus == 0) {
500                 node_set_online(0);
501                 node_cpuid[0].phys_id = hard_smp_processor_id();
502                 return;
503         }
504
505         /*
506          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
507          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
508          */
509         /* calculate total number of nodes in system from PXM bitmap */
510         memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
511         memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
512         nodes_clear(node_online_map);
513         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
514                 if (pxm_bit_test(i)) {
515                         int nid = num_online_nodes();
516                         pxm_to_nid_map[i] = nid;
517                         nid_to_pxm_map[nid] = i;
518                         node_set_online(nid);
519                 }
520         }
521
522         /* set logical node id in memory chunk structure */
523         for (i = 0; i < num_node_memblks; i++)
524                 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
525
526         /* assign memory bank numbers for each chunk on each node */
527         for_each_online_node(i) {
528                 int bank;
529
530                 bank = 0;
531                 for (j = 0; j < num_node_memblks; j++)
532                         if (node_memblk[j].nid == i)
533                                 node_memblk[j].bank = bank++;
534         }
535
536         /* set logical node id in cpu structure */
537         for (i = 0; i < srat_num_cpus; i++)
538                 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
539
540         printk(KERN_INFO "Number of logical nodes in system = %d\n",
541                num_online_nodes());
542         printk(KERN_INFO "Number of memory chunks in system = %d\n",
543                num_node_memblks);
544
545         if (!slit_table)
546                 return;
547         memset(numa_slit, -1, sizeof(numa_slit));
548         for (i = 0; i < slit_table->localities; i++) {
549                 if (!pxm_bit_test(i))
550                         continue;
551                 node_from = pxm_to_nid_map[i];
552                 for (j = 0; j < slit_table->localities; j++) {
553                         if (!pxm_bit_test(j))
554                                 continue;
555                         node_to = pxm_to_nid_map[j];
556                         node_distance(node_from, node_to) =
557                             slit_table->entry[i * slit_table->localities + j];
558                 }
559         }
560
561 #ifdef SLIT_DEBUG
562         printk("ACPI 2.0 SLIT locality table:\n");
563         for_each_online_node(i) {
564                 for_each_online_node(j)
565                     printk("%03d ", node_distance(i, j));
566                 printk("\n");
567         }
568 #endif
569 }
570 #endif                          /* CONFIG_ACPI_NUMA */
571
572 /*
573  * success: return IRQ number (>=0)
574  * failure: return < 0
575  */
576 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
577 {
578         if (has_8259 && gsi < 16)
579                 return isa_irq_to_vector(gsi);
580
581         return iosapic_register_intr(gsi,
582                                      (active_high_low ==
583                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
584                                      IOSAPIC_POL_LOW,
585                                      (edge_level ==
586                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
587                                      IOSAPIC_LEVEL);
588 }
589
590 EXPORT_SYMBOL(acpi_register_gsi);
591
592 void acpi_unregister_gsi(u32 gsi)
593 {
594         iosapic_unregister_intr(gsi);
595 }
596
597 EXPORT_SYMBOL(acpi_unregister_gsi);
598
599 static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size)
600 {
601         struct acpi_table_header *fadt_header;
602         struct fadt_descriptor_rev2 *fadt;
603
604         if (!phys_addr || !size)
605                 return -EINVAL;
606
607         fadt_header = (struct acpi_table_header *)__va(phys_addr);
608         if (fadt_header->revision != 3)
609                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
610
611         fadt = (struct fadt_descriptor_rev2 *)fadt_header;
612
613         if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
614                 acpi_kbd_controller_present = 0;
615
616         if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
617                 acpi_legacy_devices = 1;
618
619         acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
620         return 0;
621 }
622
623 unsigned long __init acpi_find_rsdp(void)
624 {
625         unsigned long rsdp_phys = 0;
626
627         if (efi.acpi20)
628                 rsdp_phys = __pa(efi.acpi20);
629         else if (efi.acpi)
630                 printk(KERN_WARNING PREFIX
631                        "v1.0/r0.71 tables no longer supported\n");
632         return rsdp_phys;
633 }
634
635 int __init acpi_boot_init(void)
636 {
637
638         /*
639          * MADT
640          * ----
641          * Parse the Multiple APIC Description Table (MADT), if exists.
642          * Note that this table provides platform SMP configuration
643          * information -- the successor to MPS tables.
644          */
645
646         if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
647                 printk(KERN_ERR PREFIX "Can't find MADT\n");
648                 goto skip_madt;
649         }
650
651         /* Local APIC */
652
653         if (acpi_table_parse_madt
654             (ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
655                 printk(KERN_ERR PREFIX
656                        "Error parsing LAPIC address override entry\n");
657
658         if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS)
659             < 1)
660                 printk(KERN_ERR PREFIX
661                        "Error parsing MADT - no LAPIC entries\n");
662
663         if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0)
664             < 0)
665                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
666
667         /* I/O APIC */
668
669         if (acpi_table_parse_madt
670             (ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
671                 printk(KERN_ERR PREFIX
672                        "Error parsing MADT - no IOSAPIC entries\n");
673
674         /* System-Level Interrupt Routing */
675
676         if (acpi_table_parse_madt
677             (ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src,
678              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
679                 printk(KERN_ERR PREFIX
680                        "Error parsing platform interrupt source entry\n");
681
682         if (acpi_table_parse_madt
683             (ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
684                 printk(KERN_ERR PREFIX
685                        "Error parsing interrupt source overrides entry\n");
686
687         if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
688                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
689       skip_madt:
690
691         /*
692          * FADT says whether a legacy keyboard controller is present.
693          * The FADT also contains an SCI_INT line, by which the system
694          * gets interrupts such as power and sleep buttons.  If it's not
695          * on a Legacy interrupt, it needs to be setup.
696          */
697         if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
698                 printk(KERN_ERR PREFIX "Can't find FADT\n");
699
700 #ifdef CONFIG_SMP
701         if (available_cpus == 0) {
702                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
703                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
704                 smp_boot_data.cpu_phys_id[available_cpus] =
705                     hard_smp_processor_id();
706                 available_cpus = 1;     /* We've got at least one of these, no? */
707         }
708         smp_boot_data.cpu_count = available_cpus;
709
710         smp_build_cpu_map();
711 # ifdef CONFIG_ACPI_NUMA
712         if (srat_num_cpus == 0) {
713                 int cpu, i = 1;
714                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
715                         if (smp_boot_data.cpu_phys_id[cpu] !=
716                             hard_smp_processor_id())
717                                 node_cpuid[i++].phys_id =
718                                     smp_boot_data.cpu_phys_id[cpu];
719         }
720 # endif
721 #endif
722 #ifdef CONFIG_ACPI_NUMA
723         build_cpu_to_node_map();
724 #endif
725         /* Make boot-up look pretty */
726         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
727                total_cpus);
728         return 0;
729 }
730
731 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
732 {
733         int vector;
734
735         if (has_8259 && gsi < 16)
736                 *irq = isa_irq_to_vector(gsi);
737         else {
738                 vector = gsi_to_vector(gsi);
739                 if (vector == -1)
740                         return -1;
741
742                 *irq = vector;
743         }
744         return 0;
745 }
746
747 /*
748  *  ACPI based hotplug CPU support
749  */
750 #ifdef CONFIG_ACPI_HOTPLUG_CPU
751 static
752 int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
753 {
754 #ifdef CONFIG_ACPI_NUMA
755         int pxm_id;
756
757         pxm_id = acpi_get_pxm(handle);
758
759         /*
760          * Assuming that the container driver would have set the proximity
761          * domain and would have initialized pxm_to_nid_map[pxm_id] && pxm_flag
762          */
763         node_cpuid[cpu].nid = (pxm_id < 0) ? 0 : pxm_to_nid_map[pxm_id];
764
765         node_cpuid[cpu].phys_id = physid;
766 #endif
767         return (0);
768 }
769
770 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
771 {
772         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
773         union acpi_object *obj;
774         struct acpi_table_lsapic *lsapic;
775         cpumask_t tmp_map;
776         long physid;
777         int cpu;
778
779         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
780                 return -EINVAL;
781
782         if (!buffer.length || !buffer.pointer)
783                 return -EINVAL;
784
785         obj = buffer.pointer;
786         if (obj->type != ACPI_TYPE_BUFFER ||
787             obj->buffer.length < sizeof(*lsapic)) {
788                 acpi_os_free(buffer.pointer);
789                 return -EINVAL;
790         }
791
792         lsapic = (struct acpi_table_lsapic *)obj->buffer.pointer;
793
794         if ((lsapic->header.type != ACPI_MADT_LSAPIC) ||
795             (!lsapic->flags.enabled)) {
796                 acpi_os_free(buffer.pointer);
797                 return -EINVAL;
798         }
799
800         physid = ((lsapic->id << 8) | (lsapic->eid));
801
802         acpi_os_free(buffer.pointer);
803         buffer.length = ACPI_ALLOCATE_BUFFER;
804         buffer.pointer = NULL;
805
806         cpus_complement(tmp_map, cpu_present_map);
807         cpu = first_cpu(tmp_map);
808         if (cpu >= NR_CPUS)
809                 return -EINVAL;
810
811         acpi_map_cpu2node(handle, cpu, physid);
812
813         cpu_set(cpu, cpu_present_map);
814         ia64_cpu_to_sapicid[cpu] = physid;
815         ia64_acpiid_to_sapicid[lsapic->acpi_id] = ia64_cpu_to_sapicid[cpu];
816
817         *pcpu = cpu;
818         return (0);
819 }
820
821 EXPORT_SYMBOL(acpi_map_lsapic);
822
823 int acpi_unmap_lsapic(int cpu)
824 {
825         int i;
826
827         for (i = 0; i < MAX_SAPICS; i++) {
828                 if (ia64_acpiid_to_sapicid[i] == ia64_cpu_to_sapicid[cpu]) {
829                         ia64_acpiid_to_sapicid[i] = -1;
830                         break;
831                 }
832         }
833         ia64_cpu_to_sapicid[cpu] = -1;
834         cpu_clear(cpu, cpu_present_map);
835
836 #ifdef CONFIG_ACPI_NUMA
837         /* NUMA specific cleanup's */
838 #endif
839
840         return (0);
841 }
842
843 EXPORT_SYMBOL(acpi_unmap_lsapic);
844 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
845
846 #ifdef CONFIG_ACPI_NUMA
847 static acpi_status __devinit
848 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
849 {
850         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
851         union acpi_object *obj;
852         struct acpi_table_iosapic *iosapic;
853         unsigned int gsi_base;
854         int pxm, node;
855
856         /* Only care about objects w/ a method that returns the MADT */
857         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
858                 return AE_OK;
859
860         if (!buffer.length || !buffer.pointer)
861                 return AE_OK;
862
863         obj = buffer.pointer;
864         if (obj->type != ACPI_TYPE_BUFFER ||
865             obj->buffer.length < sizeof(*iosapic)) {
866                 acpi_os_free(buffer.pointer);
867                 return AE_OK;
868         }
869
870         iosapic = (struct acpi_table_iosapic *)obj->buffer.pointer;
871
872         if (iosapic->header.type != ACPI_MADT_IOSAPIC) {
873                 acpi_os_free(buffer.pointer);
874                 return AE_OK;
875         }
876
877         gsi_base = iosapic->global_irq_base;
878
879         acpi_os_free(buffer.pointer);
880
881         /*
882          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
883          * us which node to associate this with.
884          */
885         pxm = acpi_get_pxm(handle);
886         if (pxm < 0)
887                 return AE_OK;
888
889         node = pxm_to_nid_map[pxm];
890
891         if (node >= MAX_NUMNODES || !node_online(node) ||
892             cpus_empty(node_to_cpumask(node)))
893                 return AE_OK;
894
895         /* We know a gsi to node mapping! */
896         map_iosapic_to_node(gsi_base, node);
897         return AE_OK;
898 }
899
900 static int __init
901 acpi_map_iosapics (void)
902 {
903         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
904         return 0;
905 }
906
907 fs_initcall(acpi_map_iosapics);
908 #endif                          /* CONFIG_ACPI_NUMA */
909
910 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
911 {
912         int err;
913
914         if ((err = iosapic_init(phys_addr, gsi_base)))
915                 return err;
916
917 #ifdef CONFIG_ACPI_NUMA
918         acpi_map_iosapic(handle, 0, NULL, NULL);
919 #endif                          /* CONFIG_ACPI_NUMA */
920
921         return 0;
922 }
923
924 EXPORT_SYMBOL(acpi_register_ioapic);
925
926 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
927 {
928         return iosapic_remove(gsi_base);
929 }
930
931 EXPORT_SYMBOL(acpi_unregister_ioapic);
932
933 #endif                          /* CONFIG_ACPI */