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