ACPI: SCI interrupt source override
[linux-2.6.git] / arch / i386 / kernel / acpi / boot.c
1 /*
2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
3  *
4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24  */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/efi.h>
29 #include <linux/cpumask.h>
30 #include <linux/module.h>
31 #include <linux/dmi.h>
32 #include <linux/irq.h>
33 #include <linux/bootmem.h>
34 #include <linux/ioport.h>
35
36 #include <asm/pgtable.h>
37 #include <asm/io_apic.h>
38 #include <asm/apic.h>
39 #include <asm/io.h>
40 #include <asm/mpspec.h>
41
42 static int __initdata acpi_force = 0;
43
44 #ifdef  CONFIG_ACPI
45 int acpi_disabled = 0;
46 #else
47 int acpi_disabled = 1;
48 #endif
49 EXPORT_SYMBOL(acpi_disabled);
50
51 #ifdef  CONFIG_X86_64
52
53 #include <asm/proto.h>
54
55 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
56
57
58 #else                           /* X86 */
59
60 #ifdef  CONFIG_X86_LOCAL_APIC
61 #include <mach_apic.h>
62 #include <mach_mpparse.h>
63 #endif                          /* CONFIG_X86_LOCAL_APIC */
64
65 #endif                          /* X86 */
66
67 #define BAD_MADT_ENTRY(entry, end) (                                        \
68                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
69                 ((acpi_table_entry_header *)entry)->length < sizeof(*entry))
70
71 #define PREFIX                  "ACPI: "
72
73 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
74 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
75 int acpi_ht __initdata = 1;     /* enable HT */
76
77 int acpi_lapic;
78 int acpi_ioapic;
79 int acpi_strict;
80 EXPORT_SYMBOL(acpi_strict);
81
82 acpi_interrupt_flags acpi_sci_flags __initdata;
83 int acpi_sci_override_gsi __initdata;
84 int acpi_skip_timer_override __initdata;
85
86 #ifdef CONFIG_X86_LOCAL_APIC
87 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
88 #endif
89
90 #ifndef __HAVE_ARCH_CMPXCHG
91 #warning ACPI uses CMPXCHG, i486 and later hardware
92 #endif
93
94 #define MAX_MADT_ENTRIES        256
95 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
96     {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
97 EXPORT_SYMBOL(x86_acpiid_to_apicid);
98
99 /* --------------------------------------------------------------------------
100                               Boot-time Configuration
101    -------------------------------------------------------------------------- */
102
103 /*
104  * The default interrupt routing model is PIC (8259).  This gets
105  * overriden if IOAPICs are enumerated (below).
106  */
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108
109 #ifdef  CONFIG_X86_64
110
111 /* rely on all ACPI tables being in the direct mapping */
112 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
113 {
114         if (!phys_addr || !size)
115                 return NULL;
116
117         if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
118                 return __va(phys_addr);
119
120         return NULL;
121 }
122
123 #else
124
125 /*
126  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
127  * to map the target physical address. The problem is that set_fixmap()
128  * provides a single page, and it is possible that the page is not
129  * sufficient.
130  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
131  * i.e. until the next __va_range() call.
132  *
133  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
134  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
135  * count idx down while incrementing the phys address.
136  */
137 char *__acpi_map_table(unsigned long phys, unsigned long size)
138 {
139         unsigned long base, offset, mapped_size;
140         int idx;
141
142         if (phys + size < 8 * 1024 * 1024)
143                 return __va(phys);
144
145         offset = phys & (PAGE_SIZE - 1);
146         mapped_size = PAGE_SIZE - offset;
147         set_fixmap(FIX_ACPI_END, phys);
148         base = fix_to_virt(FIX_ACPI_END);
149
150         /*
151          * Most cases can be covered by the below.
152          */
153         idx = FIX_ACPI_END;
154         while (mapped_size < size) {
155                 if (--idx < FIX_ACPI_BEGIN)
156                         return NULL;    /* cannot handle this */
157                 phys += PAGE_SIZE;
158                 set_fixmap(idx, phys);
159                 mapped_size += PAGE_SIZE;
160         }
161
162         return ((unsigned char *)base + offset);
163 }
164 #endif
165
166 #ifdef CONFIG_PCI_MMCONFIG
167 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
168 struct acpi_table_mcfg_config *pci_mmcfg_config;
169 int pci_mmcfg_config_num;
170
171 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
172 {
173         struct acpi_table_mcfg *mcfg;
174         unsigned long i;
175         int config_size;
176
177         if (!phys_addr || !size)
178                 return -EINVAL;
179
180         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
181         if (!mcfg) {
182                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
183                 return -ENODEV;
184         }
185
186         /* how many config structures do we have */
187         pci_mmcfg_config_num = 0;
188         i = size - sizeof(struct acpi_table_mcfg);
189         while (i >= sizeof(struct acpi_table_mcfg_config)) {
190                 ++pci_mmcfg_config_num;
191                 i -= sizeof(struct acpi_table_mcfg_config);
192         };
193         if (pci_mmcfg_config_num == 0) {
194                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
195                 return -ENODEV;
196         }
197
198         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
199         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
200         if (!pci_mmcfg_config) {
201                 printk(KERN_WARNING PREFIX
202                        "No memory for MCFG config tables\n");
203                 return -ENOMEM;
204         }
205
206         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
207         for (i = 0; i < pci_mmcfg_config_num; ++i) {
208                 if (mcfg->config[i].base_reserved) {
209                         printk(KERN_ERR PREFIX
210                                "MMCONFIG not in low 4GB of memory\n");
211                         kfree(pci_mmcfg_config);
212                         pci_mmcfg_config_num = 0;
213                         return -ENODEV;
214                 }
215         }
216
217         return 0;
218 }
219 #endif                          /* CONFIG_PCI_MMCONFIG */
220
221 #ifdef CONFIG_X86_LOCAL_APIC
222 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
223 {
224         struct acpi_table_madt *madt = NULL;
225
226         if (!phys_addr || !size || !cpu_has_apic)
227                 return -EINVAL;
228
229         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
230         if (!madt) {
231                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
232                 return -ENODEV;
233         }
234
235         if (madt->lapic_address) {
236                 acpi_lapic_addr = (u64) madt->lapic_address;
237
238                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
239                        madt->lapic_address);
240         }
241
242         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
243
244         return 0;
245 }
246
247 static int __init
248 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
249 {
250         struct acpi_table_lapic *processor = NULL;
251
252         processor = (struct acpi_table_lapic *)header;
253
254         if (BAD_MADT_ENTRY(processor, end))
255                 return -EINVAL;
256
257         acpi_table_print_madt_entry(header);
258
259         /* Record local apic id only when enabled */
260         if (processor->flags.enabled)
261                 x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
262
263         /*
264          * We need to register disabled CPU as well to permit
265          * counting disabled CPUs. This allows us to size
266          * cpus_possible_map more accurately, to permit
267          * to not preallocating memory for all NR_CPUS
268          * when we use CPU hotplug.
269          */
270         mp_register_lapic(processor->id,        /* APIC ID */
271                           processor->flags.enabled);    /* Enabled? */
272
273         return 0;
274 }
275
276 static int __init
277 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
278                           const unsigned long end)
279 {
280         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
281
282         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
283
284         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
285                 return -EINVAL;
286
287         acpi_lapic_addr = lapic_addr_ovr->address;
288
289         return 0;
290 }
291
292 static int __init
293 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
294 {
295         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
296
297         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
298
299         if (BAD_MADT_ENTRY(lapic_nmi, end))
300                 return -EINVAL;
301
302         acpi_table_print_madt_entry(header);
303
304         if (lapic_nmi->lint != 1)
305                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
306
307         return 0;
308 }
309
310 #endif                          /*CONFIG_X86_LOCAL_APIC */
311
312 #ifdef CONFIG_X86_IO_APIC
313
314 static int __init
315 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
316 {
317         struct acpi_table_ioapic *ioapic = NULL;
318
319         ioapic = (struct acpi_table_ioapic *)header;
320
321         if (BAD_MADT_ENTRY(ioapic, end))
322                 return -EINVAL;
323
324         acpi_table_print_madt_entry(header);
325
326         mp_register_ioapic(ioapic->id,
327                            ioapic->address, ioapic->global_irq_base);
328
329         return 0;
330 }
331
332 /*
333  * Parse Interrupt Source Override for the ACPI SCI
334  */
335 static void acpi_sci_ioapic_setup(u32 bus_irq, u32 gsi, u16 polarity, u16 trigger)
336 {
337         if (trigger == 0)       /* compatible SCI trigger is level */
338                 trigger = 3;
339
340         if (polarity == 0)      /* compatible SCI polarity is low */
341                 polarity = 3;
342
343         /* Command-line over-ride via acpi_sci= */
344         if (acpi_sci_flags.trigger)
345                 trigger = acpi_sci_flags.trigger;
346
347         if (acpi_sci_flags.polarity)
348                 polarity = acpi_sci_flags.polarity;
349
350         /*
351          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
352          * If GSI is < 16, this will update its flags,
353          * else it will create a new mp_irqs[] entry.
354          */
355         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
356
357         /*
358          * stash over-ride to indicate we've been here
359          * and for later update of acpi_fadt
360          */
361         acpi_sci_override_gsi = bus_irq;
362         return;
363 }
364
365 static int __init
366 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
367                        const unsigned long end)
368 {
369         struct acpi_table_int_src_ovr *intsrc = NULL;
370
371         intsrc = (struct acpi_table_int_src_ovr *)header;
372
373         if (BAD_MADT_ENTRY(intsrc, end))
374                 return -EINVAL;
375
376         acpi_table_print_madt_entry(header);
377
378         if (intsrc->bus_irq == acpi_fadt.sci_int) {
379                 acpi_sci_ioapic_setup(intsrc->bus_irq, intsrc->global_irq,
380                                       intsrc->flags.polarity,
381                                       intsrc->flags.trigger);
382                 return 0;
383         }
384
385         if (acpi_skip_timer_override &&
386             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
387                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
388                 return 0;
389         }
390
391         mp_override_legacy_irq(intsrc->bus_irq,
392                                intsrc->flags.polarity,
393                                intsrc->flags.trigger, intsrc->global_irq);
394
395         return 0;
396 }
397
398 static int __init
399 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
400 {
401         struct acpi_table_nmi_src *nmi_src = NULL;
402
403         nmi_src = (struct acpi_table_nmi_src *)header;
404
405         if (BAD_MADT_ENTRY(nmi_src, end))
406                 return -EINVAL;
407
408         acpi_table_print_madt_entry(header);
409
410         /* TBD: Support nimsrc entries? */
411
412         return 0;
413 }
414
415 #endif                          /* CONFIG_X86_IO_APIC */
416
417 /*
418  * acpi_pic_sci_set_trigger()
419  * 
420  * use ELCR to set PIC-mode trigger type for SCI
421  *
422  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
423  * it may require Edge Trigger -- use "acpi_sci=edge"
424  *
425  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
426  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
427  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
428  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
429  */
430
431 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
432 {
433         unsigned int mask = 1 << irq;
434         unsigned int old, new;
435
436         /* Real old ELCR mask */
437         old = inb(0x4d0) | (inb(0x4d1) << 8);
438
439         /*
440          * If we use ACPI to set PCI irq's, then we should clear ELCR
441          * since we will set it correctly as we enable the PCI irq
442          * routing.
443          */
444         new = acpi_noirq ? old : 0;
445
446         /*
447          * Update SCI information in the ELCR, it isn't in the PCI
448          * routing tables..
449          */
450         switch (trigger) {
451         case 1:         /* Edge - clear */
452                 new &= ~mask;
453                 break;
454         case 3:         /* Level - set */
455                 new |= mask;
456                 break;
457         }
458
459         if (old == new)
460                 return;
461
462         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
463         outb(new, 0x4d0);
464         outb(new >> 8, 0x4d1);
465 }
466
467 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
468 {
469         *irq = gsi;
470         return 0;
471 }
472
473 /*
474  * success: return IRQ number (>=0)
475  * failure: return < 0
476  */
477 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
478 {
479         unsigned int irq;
480         unsigned int plat_gsi = gsi;
481
482 #ifdef CONFIG_PCI
483         /*
484          * Make sure all (legacy) PCI IRQs are set as level-triggered.
485          */
486         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
487                 extern void eisa_set_level_irq(unsigned int irq);
488
489                 if (triggering == ACPI_LEVEL_SENSITIVE)
490                         eisa_set_level_irq(gsi);
491         }
492 #endif
493
494 #ifdef CONFIG_X86_IO_APIC
495         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
496                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
497         }
498 #endif
499         acpi_gsi_to_irq(plat_gsi, &irq);
500         return irq;
501 }
502
503 EXPORT_SYMBOL(acpi_register_gsi);
504
505 /*
506  *  ACPI based hotplug support for CPU
507  */
508 #ifdef CONFIG_ACPI_HOTPLUG_CPU
509 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
510 {
511         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
512         union acpi_object *obj;
513         struct acpi_table_lapic *lapic;
514         cpumask_t tmp_map, new_map;
515         u8 physid;
516         int cpu;
517
518         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
519                 return -EINVAL;
520
521         if (!buffer.length || !buffer.pointer)
522                 return -EINVAL;
523
524         obj = buffer.pointer;
525         if (obj->type != ACPI_TYPE_BUFFER ||
526             obj->buffer.length < sizeof(*lapic)) {
527                 kfree(buffer.pointer);
528                 return -EINVAL;
529         }
530
531         lapic = (struct acpi_table_lapic *)obj->buffer.pointer;
532
533         if ((lapic->header.type != ACPI_MADT_LAPIC) ||
534             (!lapic->flags.enabled)) {
535                 kfree(buffer.pointer);
536                 return -EINVAL;
537         }
538
539         physid = lapic->id;
540
541         kfree(buffer.pointer);
542         buffer.length = ACPI_ALLOCATE_BUFFER;
543         buffer.pointer = NULL;
544
545         tmp_map = cpu_present_map;
546         mp_register_lapic(physid, lapic->flags.enabled);
547
548         /*
549          * If mp_register_lapic successfully generates a new logical cpu
550          * number, then the following will get us exactly what was mapped
551          */
552         cpus_andnot(new_map, cpu_present_map, tmp_map);
553         if (cpus_empty(new_map)) {
554                 printk ("Unable to map lapic to logical cpu number\n");
555                 return -EINVAL;
556         }
557
558         cpu = first_cpu(new_map);
559
560         *pcpu = cpu;
561         return 0;
562 }
563
564 EXPORT_SYMBOL(acpi_map_lsapic);
565
566 int acpi_unmap_lsapic(int cpu)
567 {
568         int i;
569
570         for_each_possible_cpu(i) {
571                 if (x86_acpiid_to_apicid[i] == x86_cpu_to_apicid[cpu]) {
572                         x86_acpiid_to_apicid[i] = -1;
573                         break;
574                 }
575         }
576         x86_cpu_to_apicid[cpu] = -1;
577         cpu_clear(cpu, cpu_present_map);
578         num_processors--;
579
580         return (0);
581 }
582
583 EXPORT_SYMBOL(acpi_unmap_lsapic);
584 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
585
586 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
587 {
588         /* TBD */
589         return -EINVAL;
590 }
591
592 EXPORT_SYMBOL(acpi_register_ioapic);
593
594 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
595 {
596         /* TBD */
597         return -EINVAL;
598 }
599
600 EXPORT_SYMBOL(acpi_unregister_ioapic);
601
602 static unsigned long __init
603 acpi_scan_rsdp(unsigned long start, unsigned long length)
604 {
605         unsigned long offset = 0;
606         unsigned long sig_len = sizeof("RSD PTR ") - 1;
607
608         /*
609          * Scan all 16-byte boundaries of the physical memory region for the
610          * RSDP signature.
611          */
612         for (offset = 0; offset < length; offset += 16) {
613                 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
614                         continue;
615                 return (start + offset);
616         }
617
618         return 0;
619 }
620
621 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
622 {
623         struct acpi_table_sbf *sb;
624
625         if (!phys_addr || !size)
626                 return -EINVAL;
627
628         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
629         if (!sb) {
630                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
631                 return -ENODEV;
632         }
633
634         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
635
636         return 0;
637 }
638
639 #ifdef CONFIG_HPET_TIMER
640
641 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
642 {
643         struct acpi_table_hpet *hpet_tbl;
644         struct resource *hpet_res;
645         resource_size_t res_start;
646
647         if (!phys || !size)
648                 return -EINVAL;
649
650         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
651         if (!hpet_tbl) {
652                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
653                 return -ENODEV;
654         }
655
656         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
657                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
658                        "memory.\n");
659                 return -1;
660         }
661
662 #define HPET_RESOURCE_NAME_SIZE 9
663         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
664         if (hpet_res) {
665                 memset(hpet_res, 0, sizeof(*hpet_res));
666                 hpet_res->name = (void *)&hpet_res[1];
667                 hpet_res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
668                 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE,
669                          "HPET %u", hpet_tbl->number);
670                 hpet_res->end = (1 * 1024) - 1;
671         }
672
673 #ifdef  CONFIG_X86_64
674         vxtime.hpet_address = hpet_tbl->addr.addrl |
675             ((long)hpet_tbl->addr.addrh << 32);
676
677         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
678                hpet_tbl->id, vxtime.hpet_address);
679
680         res_start = vxtime.hpet_address;
681 #else                           /* X86 */
682         {
683                 extern unsigned long hpet_address;
684
685                 hpet_address = hpet_tbl->addr.addrl;
686                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
687                        hpet_tbl->id, hpet_address);
688
689                 res_start = hpet_address;
690         }
691 #endif                          /* X86 */
692
693         if (hpet_res) {
694                 hpet_res->start = res_start;
695                 hpet_res->end += res_start;
696                 insert_resource(&iomem_resource, hpet_res);
697         }
698
699         return 0;
700 }
701 #else
702 #define acpi_parse_hpet NULL
703 #endif
704
705 #ifdef CONFIG_X86_PM_TIMER
706 extern u32 pmtmr_ioport;
707 #endif
708
709 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
710 {
711         struct fadt_descriptor *fadt = NULL;
712
713         fadt = (struct fadt_descriptor *)__acpi_map_table(phys, size);
714         if (!fadt) {
715                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
716                 return 0;
717         }
718         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
719         acpi_fadt.sci_int = fadt->sci_int;
720
721         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
722         acpi_fadt.revision = fadt->revision;
723         acpi_fadt.force_apic_physical_destination_mode =
724             fadt->force_apic_physical_destination_mode;
725
726 #ifdef CONFIG_X86_PM_TIMER
727         /* detect the location of the ACPI PM Timer */
728         if (fadt->revision >= FADT2_REVISION_ID) {
729                 /* FADT rev. 2 */
730                 if (fadt->xpm_tmr_blk.address_space_id !=
731                     ACPI_ADR_SPACE_SYSTEM_IO)
732                         return 0;
733
734                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
735                 /*
736                  * "X" fields are optional extensions to the original V1.0
737                  * fields, so we must selectively expand V1.0 fields if the
738                  * corresponding X field is zero.
739                  */
740                 if (!pmtmr_ioport)
741                         pmtmr_ioport = fadt->V1_pm_tmr_blk;
742         } else {
743                 /* FADT rev. 1 */
744                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
745         }
746         if (pmtmr_ioport)
747                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
748                        pmtmr_ioport);
749 #endif
750         return 0;
751 }
752
753 unsigned long __init acpi_find_rsdp(void)
754 {
755         unsigned long rsdp_phys = 0;
756
757         if (efi_enabled) {
758                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
759                         return efi.acpi20;
760                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
761                         return efi.acpi;
762         }
763         /*
764          * Scan memory looking for the RSDP signature. First search EBDA (low
765          * memory) paragraphs and then search upper memory (E0000-FFFFF).
766          */
767         rsdp_phys = acpi_scan_rsdp(0, 0x400);
768         if (!rsdp_phys)
769                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
770
771         return rsdp_phys;
772 }
773
774 #ifdef  CONFIG_X86_LOCAL_APIC
775 /*
776  * Parse LAPIC entries in MADT
777  * returns 0 on success, < 0 on error
778  */
779 static int __init acpi_parse_madt_lapic_entries(void)
780 {
781         int count;
782
783         if (!cpu_has_apic)
784                 return -ENODEV;
785
786         /* 
787          * Note that the LAPIC address is obtained from the MADT (32-bit value)
788          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
789          */
790
791         count =
792             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
793                                   acpi_parse_lapic_addr_ovr, 0);
794         if (count < 0) {
795                 printk(KERN_ERR PREFIX
796                        "Error parsing LAPIC address override entry\n");
797                 return count;
798         }
799
800         mp_register_lapic_address(acpi_lapic_addr);
801
802         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
803                                       MAX_APICS);
804         if (!count) {
805                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
806                 /* TBD: Cleanup to allow fallback to MPS */
807                 return -ENODEV;
808         } else if (count < 0) {
809                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
810                 /* TBD: Cleanup to allow fallback to MPS */
811                 return count;
812         }
813
814         count =
815             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
816         if (count < 0) {
817                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
818                 /* TBD: Cleanup to allow fallback to MPS */
819                 return count;
820         }
821         return 0;
822 }
823 #endif                          /* CONFIG_X86_LOCAL_APIC */
824
825 #ifdef  CONFIG_X86_IO_APIC
826 /*
827  * Parse IOAPIC related entries in MADT
828  * returns 0 on success, < 0 on error
829  */
830 static int __init acpi_parse_madt_ioapic_entries(void)
831 {
832         int count;
833
834         /*
835          * ACPI interpreter is required to complete interrupt setup,
836          * so if it is off, don't enumerate the io-apics with ACPI.
837          * If MPS is present, it will handle them,
838          * otherwise the system will stay in PIC mode
839          */
840         if (acpi_disabled || acpi_noirq) {
841                 return -ENODEV;
842         }
843
844         if (!cpu_has_apic) 
845                 return -ENODEV;
846
847         /*
848          * if "noapic" boot option, don't look for IO-APICs
849          */
850         if (skip_ioapic_setup) {
851                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
852                        "due to 'noapic' option.\n");
853                 return -ENODEV;
854         }
855
856         count =
857             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
858                                   MAX_IO_APICS);
859         if (!count) {
860                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
861                 return -ENODEV;
862         } else if (count < 0) {
863                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
864                 return count;
865         }
866
867         count =
868             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
869                                   NR_IRQ_VECTORS);
870         if (count < 0) {
871                 printk(KERN_ERR PREFIX
872                        "Error parsing interrupt source overrides entry\n");
873                 /* TBD: Cleanup to allow fallback to MPS */
874                 return count;
875         }
876
877         /*
878          * If BIOS did not supply an INT_SRC_OVR for the SCI
879          * pretend we got one so we can set the SCI flags.
880          */
881         if (!acpi_sci_override_gsi)
882                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, acpi_fadt.sci_int, 0, 0);
883
884         /* Fill in identity legacy mapings where no override */
885         mp_config_acpi_legacy_irqs();
886
887         count =
888             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
889                                   NR_IRQ_VECTORS);
890         if (count < 0) {
891                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
892                 /* TBD: Cleanup to allow fallback to MPS */
893                 return count;
894         }
895
896         return 0;
897 }
898 #else
899 static inline int acpi_parse_madt_ioapic_entries(void)
900 {
901         return -1;
902 }
903 #endif  /* !CONFIG_X86_IO_APIC */
904
905 static void __init acpi_process_madt(void)
906 {
907 #ifdef CONFIG_X86_LOCAL_APIC
908         int count, error;
909
910         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
911         if (count >= 1) {
912
913                 /*
914                  * Parse MADT LAPIC entries
915                  */
916                 error = acpi_parse_madt_lapic_entries();
917                 if (!error) {
918                         acpi_lapic = 1;
919
920 #ifdef CONFIG_X86_GENERICARCH
921                         generic_bigsmp_probe();
922 #endif
923                         /*
924                          * Parse MADT IO-APIC entries
925                          */
926                         error = acpi_parse_madt_ioapic_entries();
927                         if (!error) {
928                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
929                                 acpi_irq_balance_set(NULL);
930                                 acpi_ioapic = 1;
931
932                                 smp_found_config = 1;
933                                 clustered_apic_check();
934                         }
935                 }
936                 if (error == -EINVAL) {
937                         /*
938                          * Dell Precision Workstation 410, 610 come here.
939                          */
940                         printk(KERN_ERR PREFIX
941                                "Invalid BIOS MADT, disabling ACPI\n");
942                         disable_acpi();
943                 }
944         }
945 #endif
946         return;
947 }
948
949 #ifdef __i386__
950
951 static int __init disable_acpi_irq(struct dmi_system_id *d)
952 {
953         if (!acpi_force) {
954                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
955                        d->ident);
956                 acpi_noirq_set();
957         }
958         return 0;
959 }
960
961 static int __init disable_acpi_pci(struct dmi_system_id *d)
962 {
963         if (!acpi_force) {
964                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
965                        d->ident);
966                 acpi_disable_pci();
967         }
968         return 0;
969 }
970
971 static int __init dmi_disable_acpi(struct dmi_system_id *d)
972 {
973         if (!acpi_force) {
974                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
975                 disable_acpi();
976         } else {
977                 printk(KERN_NOTICE
978                        "Warning: DMI blacklist says broken, but acpi forced\n");
979         }
980         return 0;
981 }
982
983 /*
984  * Limit ACPI to CPU enumeration for HT
985  */
986 static int __init force_acpi_ht(struct dmi_system_id *d)
987 {
988         if (!acpi_force) {
989                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
990                        d->ident);
991                 disable_acpi();
992                 acpi_ht = 1;
993         } else {
994                 printk(KERN_NOTICE
995                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
996         }
997         return 0;
998 }
999
1000 /*
1001  * If your system is blacklisted here, but you find that acpi=force
1002  * works for you, please contact acpi-devel@sourceforge.net
1003  */
1004 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1005         /*
1006          * Boxes that need ACPI disabled
1007          */
1008         {
1009          .callback = dmi_disable_acpi,
1010          .ident = "IBM Thinkpad",
1011          .matches = {
1012                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1013                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1014                      },
1015          },
1016
1017         /*
1018          * Boxes that need acpi=ht
1019          */
1020         {
1021          .callback = force_acpi_ht,
1022          .ident = "FSC Primergy T850",
1023          .matches = {
1024                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1025                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1026                      },
1027          },
1028         {
1029          .callback = force_acpi_ht,
1030          .ident = "DELL GX240",
1031          .matches = {
1032                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
1033                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
1034                      },
1035          },
1036         {
1037          .callback = force_acpi_ht,
1038          .ident = "HP VISUALIZE NT Workstation",
1039          .matches = {
1040                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1041                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1042                      },
1043          },
1044         {
1045          .callback = force_acpi_ht,
1046          .ident = "Compaq Workstation W8000",
1047          .matches = {
1048                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1049                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1050                      },
1051          },
1052         {
1053          .callback = force_acpi_ht,
1054          .ident = "ASUS P4B266",
1055          .matches = {
1056                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1057                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1058                      },
1059          },
1060         {
1061          .callback = force_acpi_ht,
1062          .ident = "ASUS P2B-DS",
1063          .matches = {
1064                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1065                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1066                      },
1067          },
1068         {
1069          .callback = force_acpi_ht,
1070          .ident = "ASUS CUR-DLS",
1071          .matches = {
1072                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1073                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1074                      },
1075          },
1076         {
1077          .callback = force_acpi_ht,
1078          .ident = "ABIT i440BX-W83977",
1079          .matches = {
1080                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1081                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1082                      },
1083          },
1084         {
1085          .callback = force_acpi_ht,
1086          .ident = "IBM Bladecenter",
1087          .matches = {
1088                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1089                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1090                      },
1091          },
1092         {
1093          .callback = force_acpi_ht,
1094          .ident = "IBM eServer xSeries 360",
1095          .matches = {
1096                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1097                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1098                      },
1099          },
1100         {
1101          .callback = force_acpi_ht,
1102          .ident = "IBM eserver xSeries 330",
1103          .matches = {
1104                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1105                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1106                      },
1107          },
1108         {
1109          .callback = force_acpi_ht,
1110          .ident = "IBM eserver xSeries 440",
1111          .matches = {
1112                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1113                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1114                      },
1115          },
1116
1117         /*
1118          * Boxes that need ACPI PCI IRQ routing disabled
1119          */
1120         {
1121          .callback = disable_acpi_irq,
1122          .ident = "ASUS A7V",
1123          .matches = {
1124                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1125                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1126                      /* newer BIOS, Revision 1011, does work */
1127                      DMI_MATCH(DMI_BIOS_VERSION,
1128                                "ASUS A7V ACPI BIOS Revision 1007"),
1129                      },
1130          },
1131
1132         /*
1133          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1134          */
1135         {                       /* _BBN 0 bug */
1136          .callback = disable_acpi_pci,
1137          .ident = "ASUS PR-DLS",
1138          .matches = {
1139                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1140                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1141                      DMI_MATCH(DMI_BIOS_VERSION,
1142                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1143                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1144                      },
1145          },
1146         {
1147          .callback = disable_acpi_pci,
1148          .ident = "Acer TravelMate 36x Laptop",
1149          .matches = {
1150                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1151                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1152                      },
1153          },
1154         {}
1155 };
1156
1157 #endif                          /* __i386__ */
1158
1159 /*
1160  * acpi_boot_table_init() and acpi_boot_init()
1161  *  called from setup_arch(), always.
1162  *      1. checksums all tables
1163  *      2. enumerates lapics
1164  *      3. enumerates io-apics
1165  *
1166  * acpi_table_init() is separate to allow reading SRAT without
1167  * other side effects.
1168  *
1169  * side effects of acpi_boot_init:
1170  *      acpi_lapic = 1 if LAPIC found
1171  *      acpi_ioapic = 1 if IOAPIC found
1172  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1173  *      if acpi_blacklisted() acpi_disabled = 1;
1174  *      acpi_irq_model=...
1175  *      ...
1176  *
1177  * return value: (currently ignored)
1178  *      0: success
1179  *      !0: failure
1180  */
1181
1182 int __init acpi_boot_table_init(void)
1183 {
1184         int error;
1185
1186 #ifdef __i386__
1187         dmi_check_system(acpi_dmi_table);
1188 #endif
1189
1190         /*
1191          * If acpi_disabled, bail out
1192          * One exception: acpi=ht continues far enough to enumerate LAPICs
1193          */
1194         if (acpi_disabled && !acpi_ht)
1195                 return 1;
1196
1197         /* 
1198          * Initialize the ACPI boot-time table parser.
1199          */
1200         error = acpi_table_init();
1201         if (error) {
1202                 disable_acpi();
1203                 return error;
1204         }
1205
1206         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1207
1208         /*
1209          * blacklist may disable ACPI entirely
1210          */
1211         error = acpi_blacklisted();
1212         if (error) {
1213                 if (acpi_force) {
1214                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1215                 } else {
1216                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1217                         disable_acpi();
1218                         return error;
1219                 }
1220         }
1221
1222         return 0;
1223 }
1224
1225 int __init acpi_boot_init(void)
1226 {
1227         /*
1228          * If acpi_disabled, bail out
1229          * One exception: acpi=ht continues far enough to enumerate LAPICs
1230          */
1231         if (acpi_disabled && !acpi_ht)
1232                 return 1;
1233
1234         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1235
1236         /*
1237          * set sci_int and PM timer address
1238          */
1239         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1240
1241         /*
1242          * Process the Multiple APIC Description Table (MADT), if present
1243          */
1244         acpi_process_madt();
1245
1246         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1247
1248         return 0;
1249 }
1250
1251 static int __init parse_acpi(char *arg)
1252 {
1253         if (!arg)
1254                 return -EINVAL;
1255
1256         /* "acpi=off" disables both ACPI table parsing and interpreter */
1257         if (strcmp(arg, "off") == 0) {
1258                 disable_acpi();
1259         }
1260         /* acpi=force to over-ride black-list */
1261         else if (strcmp(arg, "force") == 0) {
1262                 acpi_force = 1;
1263                 acpi_ht = 1;
1264                 acpi_disabled = 0;
1265         }
1266         /* acpi=strict disables out-of-spec workarounds */
1267         else if (strcmp(arg, "strict") == 0) {
1268                 acpi_strict = 1;
1269         }
1270         /* Limit ACPI just to boot-time to enable HT */
1271         else if (strcmp(arg, "ht") == 0) {
1272                 if (!acpi_force)
1273                         disable_acpi();
1274                 acpi_ht = 1;
1275         }
1276         /* "acpi=noirq" disables ACPI interrupt routing */
1277         else if (strcmp(arg, "noirq") == 0) {
1278                 acpi_noirq_set();
1279         } else {
1280                 /* Core will printk when we return error. */
1281                 return -EINVAL;
1282         }
1283         return 0;
1284 }
1285 early_param("acpi", parse_acpi);
1286
1287 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1288 static int __init parse_pci(char *arg)
1289 {
1290         if (arg && strcmp(arg, "noacpi") == 0)
1291                 acpi_disable_pci();
1292         return 0;
1293 }
1294 early_param("pci", parse_pci);
1295
1296 #ifdef CONFIG_X86_IO_APIC
1297 static int __init parse_acpi_skip_timer_override(char *arg)
1298 {
1299         acpi_skip_timer_override = 1;
1300         return 0;
1301 }
1302 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1303 #endif /* CONFIG_X86_IO_APIC */
1304
1305 static int __init setup_acpi_sci(char *s)
1306 {
1307         if (!s)
1308                 return -EINVAL;
1309         if (!strcmp(s, "edge"))
1310                 acpi_sci_flags.trigger = 1;
1311         else if (!strcmp(s, "level"))
1312                 acpi_sci_flags.trigger = 3;
1313         else if (!strcmp(s, "high"))
1314                 acpi_sci_flags.polarity = 1;
1315         else if (!strcmp(s, "low"))
1316                 acpi_sci_flags.polarity = 3;
1317         else
1318                 return -EINVAL;
1319         return 0;
1320 }
1321 early_param("acpi_sci", setup_acpi_sci);