Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6.git] / arch / ia64 / kernel / acpi.c
1 /*
2  *  acpi.c - Architecture-Specific Low-Level ACPI Support
3  *
4  *  Copyright (C) 1999 VA Linux Systems
5  *  Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
6  *  Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
7  *      David Mosberger-Tang <davidm@hpl.hp.com>
8  *  Copyright (C) 2000 Intel Corp.
9  *  Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
10  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
11  *  Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
12  *  Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
13  *  Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
14  *  Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
15  *
16  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17  *
18  *  This program is free software; you can redistribute it and/or modify
19  *  it under the terms of the GNU General Public License as published by
20  *  the Free Software Foundation; either version 2 of the License, or
21  *  (at your option) any later version.
22  *
23  *  This program is distributed in the hope that it will be useful,
24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
26  *  GNU General Public License for more details.
27  *
28  *  You should have received a copy of the GNU General Public License
29  *  along with this program; if not, write to the Free Software
30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31  *
32  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
33  */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/smp.h>
40 #include <linux/string.h>
41 #include <linux/types.h>
42 #include <linux/irq.h>
43 #include <linux/acpi.h>
44 #include <linux/efi.h>
45 #include <linux/mmzone.h>
46 #include <linux/nodemask.h>
47 #include <asm/io.h>
48 #include <asm/iosapic.h>
49 #include <asm/machvec.h>
50 #include <asm/page.h>
51 #include <asm/system.h>
52 #include <asm/numa.h>
53 #include <asm/sal.h>
54 #include <asm/cyclone.h>
55 #include <asm/xen/hypervisor.h>
56
57 #define BAD_MADT_ENTRY(entry, end) (                                        \
58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
59                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61 #define PREFIX                  "ACPI: "
62
63 void (*pm_idle) (void);
64 EXPORT_SYMBOL(pm_idle);
65 void (*pm_power_off) (void);
66 EXPORT_SYMBOL(pm_power_off);
67
68 u32 acpi_rsdt_forced;
69 unsigned int acpi_cpei_override;
70 unsigned int acpi_cpei_phys_cpuid;
71
72 unsigned long acpi_wakeup_address = 0;
73
74 #ifdef CONFIG_IA64_GENERIC
75 static unsigned long __init acpi_find_rsdp(void)
76 {
77         unsigned long rsdp_phys = 0;
78
79         if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
80                 rsdp_phys = efi.acpi20;
81         else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
82                 printk(KERN_WARNING PREFIX
83                        "v1.0/r0.71 tables no longer supported\n");
84         return rsdp_phys;
85 }
86 #endif
87
88 const char __init *
89 acpi_get_sysname(void)
90 {
91 #ifdef CONFIG_IA64_GENERIC
92         unsigned long rsdp_phys;
93         struct acpi_table_rsdp *rsdp;
94         struct acpi_table_xsdt *xsdt;
95         struct acpi_table_header *hdr;
96 #ifdef CONFIG_DMAR
97         u64 i, nentries;
98 #endif
99
100         rsdp_phys = acpi_find_rsdp();
101         if (!rsdp_phys) {
102                 printk(KERN_ERR
103                        "ACPI 2.0 RSDP not found, default to \"dig\"\n");
104                 return "dig";
105         }
106
107         rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
108         if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
109                 printk(KERN_ERR
110                        "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
111                 return "dig";
112         }
113
114         xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
115         hdr = &xsdt->header;
116         if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
117                 printk(KERN_ERR
118                        "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
119                 return "dig";
120         }
121
122         if (!strcmp(hdr->oem_id, "HP")) {
123                 return "hpzx1";
124         } else if (!strcmp(hdr->oem_id, "SGI")) {
125                 if (!strcmp(hdr->oem_table_id + 4, "UV"))
126                         return "uv";
127                 else
128                         return "sn2";
129         } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
130                 return "xen";
131         }
132
133 #ifdef CONFIG_DMAR
134         /* Look for Intel IOMMU */
135         nentries = (hdr->length - sizeof(*hdr)) /
136                          sizeof(xsdt->table_offset_entry[0]);
137         for (i = 0; i < nentries; i++) {
138                 hdr = __va(xsdt->table_offset_entry[i]);
139                 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
140                         sizeof(ACPI_SIG_DMAR) - 1) == 0)
141                         return "dig_vtd";
142         }
143 #endif
144
145         return "dig";
146 #else
147 # if defined (CONFIG_IA64_HP_SIM)
148         return "hpsim";
149 # elif defined (CONFIG_IA64_HP_ZX1)
150         return "hpzx1";
151 # elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
152         return "hpzx1_swiotlb";
153 # elif defined (CONFIG_IA64_SGI_SN2)
154         return "sn2";
155 # elif defined (CONFIG_IA64_SGI_UV)
156         return "uv";
157 # elif defined (CONFIG_IA64_DIG)
158         return "dig";
159 # elif defined (CONFIG_IA64_XEN_GUEST)
160         return "xen";
161 # elif defined(CONFIG_IA64_DIG_VTD)
162         return "dig_vtd";
163 # else
164 #       error Unknown platform.  Fix acpi.c.
165 # endif
166 #endif
167 }
168
169 #ifdef CONFIG_ACPI
170
171 #define ACPI_MAX_PLATFORM_INTERRUPTS    256
172
173 /* Array to record platform interrupt vectors for generic interrupt routing. */
174 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
175         [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
176 };
177
178 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
179
180 /*
181  * Interrupt routing API for device drivers.  Provides interrupt vector for
182  * a generic platform event.  Currently only CPEI is implemented.
183  */
184 int acpi_request_vector(u32 int_type)
185 {
186         int vector = -1;
187
188         if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
189                 /* corrected platform error interrupt */
190                 vector = platform_intr_list[int_type];
191         } else
192                 printk(KERN_ERR
193                        "acpi_request_vector(): invalid interrupt type\n");
194         return vector;
195 }
196
197 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
198 {
199         return __va(phys_addr);
200 }
201
202 void __init __acpi_unmap_table(char *map, unsigned long size)
203 {
204 }
205
206 /* --------------------------------------------------------------------------
207                             Boot-time Table Parsing
208    -------------------------------------------------------------------------- */
209
210 static int available_cpus __initdata;
211 struct acpi_table_madt *acpi_madt __initdata;
212 static u8 has_8259;
213
214 static int __init
215 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
216                           const unsigned long end)
217 {
218         struct acpi_madt_local_apic_override *lapic;
219
220         lapic = (struct acpi_madt_local_apic_override *)header;
221
222         if (BAD_MADT_ENTRY(lapic, end))
223                 return -EINVAL;
224
225         if (lapic->address) {
226                 iounmap(ipi_base_addr);
227                 ipi_base_addr = ioremap(lapic->address, 0);
228         }
229         return 0;
230 }
231
232 static int __init
233 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
234 {
235         struct acpi_madt_local_sapic *lsapic;
236
237         lsapic = (struct acpi_madt_local_sapic *)header;
238
239         /*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
240
241         if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
242 #ifdef CONFIG_SMP
243                 smp_boot_data.cpu_phys_id[available_cpus] =
244                     (lsapic->id << 8) | lsapic->eid;
245 #endif
246                 ++available_cpus;
247         }
248
249         total_cpus++;
250         return 0;
251 }
252
253 static int __init
254 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
255 {
256         struct acpi_madt_local_apic_nmi *lacpi_nmi;
257
258         lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
259
260         if (BAD_MADT_ENTRY(lacpi_nmi, end))
261                 return -EINVAL;
262
263         /* TBD: Support lapic_nmi entries */
264         return 0;
265 }
266
267 static int __init
268 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
269 {
270         struct acpi_madt_io_sapic *iosapic;
271
272         iosapic = (struct acpi_madt_io_sapic *)header;
273
274         if (BAD_MADT_ENTRY(iosapic, end))
275                 return -EINVAL;
276
277         return iosapic_init(iosapic->address, iosapic->global_irq_base);
278 }
279
280 static unsigned int __initdata acpi_madt_rev;
281
282 static int __init
283 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
284                         const unsigned long end)
285 {
286         struct acpi_madt_interrupt_source *plintsrc;
287         int vector;
288
289         plintsrc = (struct acpi_madt_interrupt_source *)header;
290
291         if (BAD_MADT_ENTRY(plintsrc, end))
292                 return -EINVAL;
293
294         /*
295          * Get vector assignment for this interrupt, set attributes,
296          * and program the IOSAPIC routing table.
297          */
298         vector = iosapic_register_platform_intr(plintsrc->type,
299                                                 plintsrc->global_irq,
300                                                 plintsrc->io_sapic_vector,
301                                                 plintsrc->eid,
302                                                 plintsrc->id,
303                                                 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
304                                                  ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
305                                                 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
306                                                 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
307                                                  ACPI_MADT_TRIGGER_EDGE) ?
308                                                 IOSAPIC_EDGE : IOSAPIC_LEVEL);
309
310         platform_intr_list[plintsrc->type] = vector;
311         if (acpi_madt_rev > 1) {
312                 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
313         }
314
315         /*
316          * Save the physical id, so we can check when its being removed
317          */
318         acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
319
320         return 0;
321 }
322
323 #ifdef CONFIG_HOTPLUG_CPU
324 unsigned int can_cpei_retarget(void)
325 {
326         extern int cpe_vector;
327         extern unsigned int force_cpei_retarget;
328
329         /*
330          * Only if CPEI is supported and the override flag
331          * is present, otherwise return that its re-targettable
332          * if we are in polling mode.
333          */
334         if (cpe_vector > 0) {
335                 if (acpi_cpei_override || force_cpei_retarget)
336                         return 1;
337                 else
338                         return 0;
339         }
340         return 1;
341 }
342
343 unsigned int is_cpu_cpei_target(unsigned int cpu)
344 {
345         unsigned int logical_id;
346
347         logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
348
349         if (logical_id == cpu)
350                 return 1;
351         else
352                 return 0;
353 }
354
355 void set_cpei_target_cpu(unsigned int cpu)
356 {
357         acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
358 }
359 #endif
360
361 unsigned int get_cpei_target_cpu(void)
362 {
363         return acpi_cpei_phys_cpuid;
364 }
365
366 static int __init
367 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
368                        const unsigned long end)
369 {
370         struct acpi_madt_interrupt_override *p;
371
372         p = (struct acpi_madt_interrupt_override *)header;
373
374         if (BAD_MADT_ENTRY(p, end))
375                 return -EINVAL;
376
377         iosapic_override_isa_irq(p->source_irq, p->global_irq,
378                                  ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
379                                   ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
380                                  IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
381                                  ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
382                                  ACPI_MADT_TRIGGER_EDGE) ?
383                                  IOSAPIC_EDGE : IOSAPIC_LEVEL);
384         return 0;
385 }
386
387 static int __init
388 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
389 {
390         struct acpi_madt_nmi_source *nmi_src;
391
392         nmi_src = (struct acpi_madt_nmi_source *)header;
393
394         if (BAD_MADT_ENTRY(nmi_src, end))
395                 return -EINVAL;
396
397         /* TBD: Support nimsrc entries */
398         return 0;
399 }
400
401 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
402 {
403         if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
404
405                 /*
406                  * Unfortunately ITC_DRIFT is not yet part of the
407                  * official SAL spec, so the ITC_DRIFT bit is not
408                  * set by the BIOS on this hardware.
409                  */
410                 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
411
412                 cyclone_setup();
413         }
414 }
415
416 static int __init acpi_parse_madt(struct acpi_table_header *table)
417 {
418         if (!table)
419                 return -EINVAL;
420
421         acpi_madt = (struct acpi_table_madt *)table;
422
423         acpi_madt_rev = acpi_madt->header.revision;
424
425         /* remember the value for reference after free_initmem() */
426 #ifdef CONFIG_ITANIUM
427         has_8259 = 1;           /* Firmware on old Itanium systems is broken */
428 #else
429         has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
430 #endif
431         iosapic_system_init(has_8259);
432
433         /* Get base address of IPI Message Block */
434
435         if (acpi_madt->address)
436                 ipi_base_addr = ioremap(acpi_madt->address, 0);
437
438         printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
439
440         acpi_madt_oem_check(acpi_madt->header.oem_id,
441                             acpi_madt->header.oem_table_id);
442
443         return 0;
444 }
445
446 #ifdef CONFIG_ACPI_NUMA
447
448 #undef SLIT_DEBUG
449
450 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
451
452 static int __initdata srat_num_cpus;    /* number of cpus */
453 static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
454 #define pxm_bit_set(bit)        (set_bit(bit,(void *)pxm_flag))
455 #define pxm_bit_test(bit)       (test_bit(bit,(void *)pxm_flag))
456 static struct acpi_table_slit __initdata *slit_table;
457 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
458
459 static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
460 {
461         int pxm;
462
463         pxm = pa->proximity_domain_lo;
464         if (ia64_platform_is("sn2"))
465                 pxm += pa->proximity_domain_hi[0] << 8;
466         return pxm;
467 }
468
469 static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
470 {
471         int pxm;
472
473         pxm = ma->proximity_domain;
474         if (!ia64_platform_is("sn2"))
475                 pxm &= 0xff;
476
477         return pxm;
478 }
479
480 /*
481  * ACPI 2.0 SLIT (System Locality Information Table)
482  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
483  */
484 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
485 {
486         u32 len;
487
488         len = sizeof(struct acpi_table_header) + 8
489             + slit->locality_count * slit->locality_count;
490         if (slit->header.length != len) {
491                 printk(KERN_ERR
492                        "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
493                        len, slit->header.length);
494                 return;
495         }
496         slit_table = slit;
497 }
498
499 void __init
500 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
501 {
502         int pxm;
503
504         if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
505                 return;
506
507         pxm = get_processor_proximity_domain(pa);
508
509         /* record this node in proximity bitmap */
510         pxm_bit_set(pxm);
511
512         node_cpuid[srat_num_cpus].phys_id =
513             (pa->apic_id << 8) | (pa->local_sapic_eid);
514         /* nid should be overridden as logical node id later */
515         node_cpuid[srat_num_cpus].nid = pxm;
516         cpu_set(srat_num_cpus, early_cpu_possible_map);
517         srat_num_cpus++;
518 }
519
520 void __init
521 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
522 {
523         unsigned long paddr, size;
524         int pxm;
525         struct node_memblk_s *p, *q, *pend;
526
527         pxm = get_memory_proximity_domain(ma);
528
529         /* fill node memory chunk structure */
530         paddr = ma->base_address;
531         size = ma->length;
532
533         /* Ignore disabled entries */
534         if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
535                 return;
536
537         /* record this node in proximity bitmap */
538         pxm_bit_set(pxm);
539
540         /* Insertion sort based on base address */
541         pend = &node_memblk[num_node_memblks];
542         for (p = &node_memblk[0]; p < pend; p++) {
543                 if (paddr < p->start_paddr)
544                         break;
545         }
546         if (p < pend) {
547                 for (q = pend - 1; q >= p; q--)
548                         *(q + 1) = *q;
549         }
550         p->start_paddr = paddr;
551         p->size = size;
552         p->nid = pxm;
553         num_node_memblks++;
554 }
555
556 void __init acpi_numa_arch_fixup(void)
557 {
558         int i, j, node_from, node_to;
559
560         /* If there's no SRAT, fix the phys_id and mark node 0 online */
561         if (srat_num_cpus == 0) {
562                 node_set_online(0);
563                 node_cpuid[0].phys_id = hard_smp_processor_id();
564                 return;
565         }
566
567         /*
568          * MCD - This can probably be dropped now.  No need for pxm ID to node ID
569          * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
570          */
571         nodes_clear(node_online_map);
572         for (i = 0; i < MAX_PXM_DOMAINS; i++) {
573                 if (pxm_bit_test(i)) {
574                         int nid = acpi_map_pxm_to_node(i);
575                         node_set_online(nid);
576                 }
577         }
578
579         /* set logical node id in memory chunk structure */
580         for (i = 0; i < num_node_memblks; i++)
581                 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
582
583         /* assign memory bank numbers for each chunk on each node */
584         for_each_online_node(i) {
585                 int bank;
586
587                 bank = 0;
588                 for (j = 0; j < num_node_memblks; j++)
589                         if (node_memblk[j].nid == i)
590                                 node_memblk[j].bank = bank++;
591         }
592
593         /* set logical node id in cpu structure */
594         for_each_possible_early_cpu(i)
595                 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
596
597         printk(KERN_INFO "Number of logical nodes in system = %d\n",
598                num_online_nodes());
599         printk(KERN_INFO "Number of memory chunks in system = %d\n",
600                num_node_memblks);
601
602         if (!slit_table) {
603                 for (i = 0; i < MAX_NUMNODES; i++)
604                         for (j = 0; j < MAX_NUMNODES; j++)
605                                 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
606                                                         REMOTE_DISTANCE;
607                 return;
608         }
609
610         memset(numa_slit, -1, sizeof(numa_slit));
611         for (i = 0; i < slit_table->locality_count; i++) {
612                 if (!pxm_bit_test(i))
613                         continue;
614                 node_from = pxm_to_node(i);
615                 for (j = 0; j < slit_table->locality_count; j++) {
616                         if (!pxm_bit_test(j))
617                                 continue;
618                         node_to = pxm_to_node(j);
619                         node_distance(node_from, node_to) =
620                             slit_table->entry[i * slit_table->locality_count + j];
621                 }
622         }
623
624 #ifdef SLIT_DEBUG
625         printk("ACPI 2.0 SLIT locality table:\n");
626         for_each_online_node(i) {
627                 for_each_online_node(j)
628                     printk("%03d ", node_distance(i, j));
629                 printk("\n");
630         }
631 #endif
632 }
633 #endif                          /* CONFIG_ACPI_NUMA */
634
635 /*
636  * success: return IRQ number (>=0)
637  * failure: return < 0
638  */
639 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
640 {
641         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
642                 return gsi;
643
644         if (has_8259 && gsi < 16)
645                 return isa_irq_to_vector(gsi);
646
647         return iosapic_register_intr(gsi,
648                                      (polarity ==
649                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
650                                      IOSAPIC_POL_LOW,
651                                      (triggering ==
652                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
653                                      IOSAPIC_LEVEL);
654 }
655
656 void acpi_unregister_gsi(u32 gsi)
657 {
658         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
659                 return;
660
661         if (has_8259 && gsi < 16)
662                 return;
663
664         iosapic_unregister_intr(gsi);
665 }
666
667 static int __init acpi_parse_fadt(struct acpi_table_header *table)
668 {
669         struct acpi_table_header *fadt_header;
670         struct acpi_table_fadt *fadt;
671
672         if (!table)
673                 return -EINVAL;
674
675         fadt_header = (struct acpi_table_header *)table;
676         if (fadt_header->revision != 3)
677                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
678
679         fadt = (struct acpi_table_fadt *)fadt_header;
680
681         acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
682                                  ACPI_ACTIVE_LOW);
683         return 0;
684 }
685
686 int __init early_acpi_boot_init(void)
687 {
688         int ret;
689
690         /*
691          * do a partial walk of MADT to determine how many CPUs
692          * we have including offline CPUs
693          */
694         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
695                 printk(KERN_ERR PREFIX "Can't find MADT\n");
696                 return 0;
697         }
698
699         ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
700                 acpi_parse_lsapic, NR_CPUS);
701         if (ret < 1)
702                 printk(KERN_ERR PREFIX
703                        "Error parsing MADT - no LAPIC entries\n");
704
705 #ifdef CONFIG_SMP
706         if (available_cpus == 0) {
707                 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
708                 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
709                 smp_boot_data.cpu_phys_id[available_cpus] =
710                     hard_smp_processor_id();
711                 available_cpus = 1;     /* We've got at least one of these, no? */
712         }
713         smp_boot_data.cpu_count = available_cpus;
714 #endif
715         /* Make boot-up look pretty */
716         printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
717                total_cpus);
718
719         return 0;
720 }
721
722 int __init acpi_boot_init(void)
723 {
724
725         /*
726          * MADT
727          * ----
728          * Parse the Multiple APIC Description Table (MADT), if exists.
729          * Note that this table provides platform SMP configuration
730          * information -- the successor to MPS tables.
731          */
732
733         if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
734                 printk(KERN_ERR PREFIX "Can't find MADT\n");
735                 goto skip_madt;
736         }
737
738         /* Local APIC */
739
740         if (acpi_table_parse_madt
741             (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
742                 printk(KERN_ERR PREFIX
743                        "Error parsing LAPIC address override entry\n");
744
745         if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
746             < 0)
747                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
748
749         /* I/O APIC */
750
751         if (acpi_table_parse_madt
752             (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
753                 if (!ia64_platform_is("sn2"))
754                         printk(KERN_ERR PREFIX
755                                "Error parsing MADT - no IOSAPIC entries\n");
756         }
757
758         /* System-Level Interrupt Routing */
759
760         if (acpi_table_parse_madt
761             (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
762              ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
763                 printk(KERN_ERR PREFIX
764                        "Error parsing platform interrupt source entry\n");
765
766         if (acpi_table_parse_madt
767             (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
768                 printk(KERN_ERR PREFIX
769                        "Error parsing interrupt source overrides entry\n");
770
771         if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
772                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
773       skip_madt:
774
775         /*
776          * FADT says whether a legacy keyboard controller is present.
777          * The FADT also contains an SCI_INT line, by which the system
778          * gets interrupts such as power and sleep buttons.  If it's not
779          * on a Legacy interrupt, it needs to be setup.
780          */
781         if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
782                 printk(KERN_ERR PREFIX "Can't find FADT\n");
783
784 #ifdef CONFIG_ACPI_NUMA
785 #ifdef CONFIG_SMP
786         if (srat_num_cpus == 0) {
787                 int cpu, i = 1;
788                 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
789                         if (smp_boot_data.cpu_phys_id[cpu] !=
790                             hard_smp_processor_id())
791                                 node_cpuid[i++].phys_id =
792                                     smp_boot_data.cpu_phys_id[cpu];
793         }
794 #endif
795         build_cpu_to_node_map();
796 #endif
797         return 0;
798 }
799
800 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
801 {
802         int tmp;
803
804         if (has_8259 && gsi < 16)
805                 *irq = isa_irq_to_vector(gsi);
806         else {
807                 tmp = gsi_to_irq(gsi);
808                 if (tmp == -1)
809                         return -1;
810                 *irq = tmp;
811         }
812         return 0;
813 }
814
815 /*
816  *  ACPI based hotplug CPU support
817  */
818 #ifdef CONFIG_ACPI_HOTPLUG_CPU
819 static
820 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
821 {
822 #ifdef CONFIG_ACPI_NUMA
823         int pxm_id;
824         int nid;
825
826         pxm_id = acpi_get_pxm(handle);
827         /*
828          * We don't have cpu-only-node hotadd. But if the system equips
829          * SRAT table, pxm is already found and node is ready.
830          * So, just pxm_to_nid(pxm) is OK.
831          * This code here is for the system which doesn't have full SRAT
832          * table for possible cpus.
833          */
834         nid = acpi_map_pxm_to_node(pxm_id);
835         node_cpuid[cpu].phys_id = physid;
836         node_cpuid[cpu].nid = nid;
837 #endif
838         return (0);
839 }
840
841 int additional_cpus __initdata = -1;
842
843 static __init int setup_additional_cpus(char *s)
844 {
845         if (s)
846                 additional_cpus = simple_strtol(s, NULL, 0);
847
848         return 0;
849 }
850
851 early_param("additional_cpus", setup_additional_cpus);
852
853 /*
854  * cpu_possible_map should be static, it cannot change as CPUs
855  * are onlined, or offlined. The reason is per-cpu data-structures
856  * are allocated by some modules at init time, and dont expect to
857  * do this dynamically on cpu arrival/departure.
858  * cpu_present_map on the other hand can change dynamically.
859  * In case when cpu_hotplug is not compiled, then we resort to current
860  * behaviour, which is cpu_possible == cpu_present.
861  * - Ashok Raj
862  *
863  * Three ways to find out the number of additional hotplug CPUs:
864  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
865  * - The user can overwrite it with additional_cpus=NUM
866  * - Otherwise don't reserve additional CPUs.
867  */
868 __init void prefill_possible_map(void)
869 {
870         int i;
871         int possible, disabled_cpus;
872
873         disabled_cpus = total_cpus - available_cpus;
874
875         if (additional_cpus == -1) {
876                 if (disabled_cpus > 0)
877                         additional_cpus = disabled_cpus;
878                 else
879                         additional_cpus = 0;
880         }
881
882         possible = available_cpus + additional_cpus;
883
884         if (possible > NR_CPUS)
885                 possible = NR_CPUS;
886
887         printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
888                 possible, max((possible - available_cpus), 0));
889
890         for (i = 0; i < possible; i++)
891                 set_cpu_possible(i, true);
892 }
893
894 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
895 {
896         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
897         union acpi_object *obj;
898         struct acpi_madt_local_sapic *lsapic;
899         cpumask_t tmp_map;
900         int cpu, physid;
901
902         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
903                 return -EINVAL;
904
905         if (!buffer.length || !buffer.pointer)
906                 return -EINVAL;
907
908         obj = buffer.pointer;
909         if (obj->type != ACPI_TYPE_BUFFER)
910         {
911                 kfree(buffer.pointer);
912                 return -EINVAL;
913         }
914
915         lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
916
917         if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
918             (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
919                 kfree(buffer.pointer);
920                 return -EINVAL;
921         }
922
923         physid = ((lsapic->id << 8) | (lsapic->eid));
924
925         kfree(buffer.pointer);
926         buffer.length = ACPI_ALLOCATE_BUFFER;
927         buffer.pointer = NULL;
928
929         cpumask_complement(&tmp_map, cpu_present_mask);
930         cpu = cpumask_first(&tmp_map);
931         if (cpu >= nr_cpu_ids)
932                 return -EINVAL;
933
934         acpi_map_cpu2node(handle, cpu, physid);
935
936         cpu_set(cpu, cpu_present_map);
937         ia64_cpu_to_sapicid[cpu] = physid;
938
939         *pcpu = cpu;
940         return (0);
941 }
942
943 EXPORT_SYMBOL(acpi_map_lsapic);
944
945 int acpi_unmap_lsapic(int cpu)
946 {
947         ia64_cpu_to_sapicid[cpu] = -1;
948         cpu_clear(cpu, cpu_present_map);
949
950 #ifdef CONFIG_ACPI_NUMA
951         /* NUMA specific cleanup's */
952 #endif
953
954         return (0);
955 }
956
957 EXPORT_SYMBOL(acpi_unmap_lsapic);
958 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
959
960 #ifdef CONFIG_ACPI_NUMA
961 static acpi_status __devinit
962 acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
963 {
964         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
965         union acpi_object *obj;
966         struct acpi_madt_io_sapic *iosapic;
967         unsigned int gsi_base;
968         int pxm, node;
969
970         /* Only care about objects w/ a method that returns the MADT */
971         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
972                 return AE_OK;
973
974         if (!buffer.length || !buffer.pointer)
975                 return AE_OK;
976
977         obj = buffer.pointer;
978         if (obj->type != ACPI_TYPE_BUFFER ||
979             obj->buffer.length < sizeof(*iosapic)) {
980                 kfree(buffer.pointer);
981                 return AE_OK;
982         }
983
984         iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
985
986         if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
987                 kfree(buffer.pointer);
988                 return AE_OK;
989         }
990
991         gsi_base = iosapic->global_irq_base;
992
993         kfree(buffer.pointer);
994
995         /*
996          * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
997          * us which node to associate this with.
998          */
999         pxm = acpi_get_pxm(handle);
1000         if (pxm < 0)
1001                 return AE_OK;
1002
1003         node = pxm_to_node(pxm);
1004
1005         if (node >= MAX_NUMNODES || !node_online(node) ||
1006             cpumask_empty(cpumask_of_node(node)))
1007                 return AE_OK;
1008
1009         /* We know a gsi to node mapping! */
1010         map_iosapic_to_node(gsi_base, node);
1011         return AE_OK;
1012 }
1013
1014 static int __init
1015 acpi_map_iosapics (void)
1016 {
1017         acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1018         return 0;
1019 }
1020
1021 fs_initcall(acpi_map_iosapics);
1022 #endif                          /* CONFIG_ACPI_NUMA */
1023
1024 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1025 {
1026         int err;
1027
1028         if ((err = iosapic_init(phys_addr, gsi_base)))
1029                 return err;
1030
1031 #ifdef CONFIG_ACPI_NUMA
1032         acpi_map_iosapic(handle, 0, NULL, NULL);
1033 #endif                          /* CONFIG_ACPI_NUMA */
1034
1035         return 0;
1036 }
1037
1038 EXPORT_SYMBOL(acpi_register_ioapic);
1039
1040 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1041 {
1042         return iosapic_remove(gsi_base);
1043 }
1044
1045 EXPORT_SYMBOL(acpi_unregister_ioapic);
1046
1047 /*
1048  * acpi_save_state_mem() - save kernel state
1049  *
1050  * TBD when when IA64 starts to support suspend...
1051  */
1052 int acpi_save_state_mem(void) { return 0; } 
1053
1054 /*
1055  * acpi_restore_state()
1056  */
1057 void acpi_restore_state_mem(void) {}
1058
1059 /*
1060  * do_suspend_lowlevel()
1061  */
1062 void do_suspend_lowlevel(void) {}
1063
1064 #endif                          /* CONFIG_ACPI */