ACPICA: Remove duplicate table definitions (non-conflicting)
[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                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
70
71 #define PREFIX                  "ACPI: "
72
73 int acpi_noirq;                         /* 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 u8 acpi_sci_flags __initdata;
83 int acpi_sci_override_gsi __initdata;
84 int acpi_skip_timer_override __initdata;
85 int acpi_use_timer_override __initdata;
86
87 #ifdef CONFIG_X86_LOCAL_APIC
88 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
89 #endif
90
91 #ifndef __HAVE_ARCH_CMPXCHG
92 #warning ACPI uses CMPXCHG, i486 and later hardware
93 #endif
94
95 #define MAX_MADT_ENTRIES        256
96 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
97     {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
98 EXPORT_SYMBOL(x86_acpiid_to_apicid);
99
100 /* --------------------------------------------------------------------------
101                               Boot-time Configuration
102    -------------------------------------------------------------------------- */
103
104 /*
105  * The default interrupt routing model is PIC (8259).  This gets
106  * overriden if IOAPICs are enumerated (below).
107  */
108 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
109
110 #ifdef  CONFIG_X86_64
111
112 /* rely on all ACPI tables being in the direct mapping */
113 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
114 {
115         if (!phys_addr || !size)
116                 return NULL;
117
118         if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
119                 return __va(phys_addr);
120
121         return NULL;
122 }
123
124 #else
125
126 /*
127  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
128  * to map the target physical address. The problem is that set_fixmap()
129  * provides a single page, and it is possible that the page is not
130  * sufficient.
131  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
132  * i.e. until the next __va_range() call.
133  *
134  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
135  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
136  * count idx down while incrementing the phys address.
137  */
138 char *__acpi_map_table(unsigned long phys, unsigned long size)
139 {
140         unsigned long base, offset, mapped_size;
141         int idx;
142
143         if (phys + size < 8 * 1024 * 1024)
144                 return __va(phys);
145
146         offset = phys & (PAGE_SIZE - 1);
147         mapped_size = PAGE_SIZE - offset;
148         set_fixmap(FIX_ACPI_END, phys);
149         base = fix_to_virt(FIX_ACPI_END);
150
151         /*
152          * Most cases can be covered by the below.
153          */
154         idx = FIX_ACPI_END;
155         while (mapped_size < size) {
156                 if (--idx < FIX_ACPI_BEGIN)
157                         return NULL;    /* cannot handle this */
158                 phys += PAGE_SIZE;
159                 set_fixmap(idx, phys);
160                 mapped_size += PAGE_SIZE;
161         }
162
163         return ((unsigned char *)base + offset);
164 }
165 #endif
166
167 #ifdef CONFIG_PCI_MMCONFIG
168 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
169 struct acpi_table_mcfg_config *pci_mmcfg_config;
170 int pci_mmcfg_config_num;
171
172 int __init acpi_parse_mcfg(struct acpi_table_header *header)
173 {
174         struct acpi_table_mcfg *mcfg;
175         unsigned long i;
176         int config_size;
177
178         if (!header)
179                 return -EINVAL;
180
181         mcfg = (struct acpi_table_mcfg *)header;
182         if (!mcfg) {
183                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
184                 return -ENODEV;
185         }
186
187         /* how many config structures do we have */
188         pci_mmcfg_config_num = 0;
189         i = header->length - sizeof(struct acpi_table_mcfg);
190         while (i >= sizeof(struct acpi_table_mcfg_config)) {
191                 ++pci_mmcfg_config_num;
192                 i -= sizeof(struct acpi_table_mcfg_config);
193         };
194         if (pci_mmcfg_config_num == 0) {
195                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
196                 return -ENODEV;
197         }
198
199         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
200         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
201         if (!pci_mmcfg_config) {
202                 printk(KERN_WARNING PREFIX
203                        "No memory for MCFG config tables\n");
204                 return -ENOMEM;
205         }
206
207         memcpy(pci_mmcfg_config, &mcfg[1], config_size);
208         for (i = 0; i < pci_mmcfg_config_num; ++i) {
209                 if (pci_mmcfg_config[i].base_reserved) {
210                         printk(KERN_ERR PREFIX
211                                "MMCONFIG not in low 4GB of memory\n");
212                         kfree(pci_mmcfg_config);
213                         pci_mmcfg_config_num = 0;
214                         return -ENODEV;
215                 }
216         }
217
218         return 0;
219 }
220 #endif                          /* CONFIG_PCI_MMCONFIG */
221
222 #ifdef CONFIG_X86_LOCAL_APIC
223 static int __init acpi_parse_madt(struct acpi_table_header *header)
224 {
225         struct acpi_table_madt *madt = NULL;
226
227         if (!header|| !cpu_has_apic)
228                 return -EINVAL;
229
230         madt = (struct acpi_table_madt *)header;
231         if (!madt) {
232                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
233                 return -ENODEV;
234         }
235
236         if (madt->address) {
237                 acpi_lapic_addr = (u64) madt->address;
238
239                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
240                        madt->address);
241         }
242
243         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
244
245         return 0;
246 }
247
248 static int __init
249 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
250 {
251         struct acpi_madt_local_apic *processor = NULL;
252
253         processor = (struct acpi_madt_local_apic *)header;
254
255         if (BAD_MADT_ENTRY(processor, end))
256                 return -EINVAL;
257
258         acpi_table_print_madt_entry(header);
259
260         /* Record local apic id only when enabled */
261         if (processor->lapic_flags & ACPI_MADT_ENABLED)
262                 x86_acpiid_to_apicid[processor->processor_id] = processor->id;
263
264         /*
265          * We need to register disabled CPU as well to permit
266          * counting disabled CPUs. This allows us to size
267          * cpus_possible_map more accurately, to permit
268          * to not preallocating memory for all NR_CPUS
269          * when we use CPU hotplug.
270          */
271         mp_register_lapic(processor->id,        /* APIC ID */
272                           processor->lapic_flags & ACPI_MADT_ENABLED);  /* Enabled? */
273
274         return 0;
275 }
276
277 static int __init
278 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
279                           const unsigned long end)
280 {
281         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
282
283         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
284
285         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
286                 return -EINVAL;
287
288         acpi_lapic_addr = lapic_addr_ovr->address;
289
290         return 0;
291 }
292
293 static int __init
294 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
295 {
296         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
297
298         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
299
300         if (BAD_MADT_ENTRY(lapic_nmi, end))
301                 return -EINVAL;
302
303         acpi_table_print_madt_entry(header);
304
305         if (lapic_nmi->lint != 1)
306                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
307
308         return 0;
309 }
310
311 #endif                          /*CONFIG_X86_LOCAL_APIC */
312
313 #ifdef CONFIG_X86_IO_APIC
314
315 static int __init
316 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
317 {
318         struct acpi_madt_io_apic *ioapic = NULL;
319
320         ioapic = (struct acpi_madt_io_apic *)header;
321
322         if (BAD_MADT_ENTRY(ioapic, end))
323                 return -EINVAL;
324
325         acpi_table_print_madt_entry(header);
326
327         mp_register_ioapic(ioapic->id,
328                            ioapic->address, ioapic->global_irq_base);
329
330         return 0;
331 }
332
333 /*
334  * Parse Interrupt Source Override for the ACPI SCI
335  */
336 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
337 {
338         if (trigger == 0)       /* compatible SCI trigger is level */
339                 trigger = 3;
340
341         if (polarity == 0)      /* compatible SCI polarity is low */
342                 polarity = 3;
343
344         /* Command-line over-ride via acpi_sci= */
345         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
346                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
347
348         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
349                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
350
351         /*
352          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
353          * If GSI is < 16, this will update its flags,
354          * else it will create a new mp_irqs[] entry.
355          */
356         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
357
358         /*
359          * stash over-ride to indicate we've been here
360          * and for later update of acpi_gbl_FADT
361          */
362         acpi_sci_override_gsi = gsi;
363         return;
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 *intsrc = NULL;
371
372         intsrc = (struct acpi_madt_interrupt_override *)header;
373
374         if (BAD_MADT_ENTRY(intsrc, end))
375                 return -EINVAL;
376
377         acpi_table_print_madt_entry(header);
378
379         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
380                 acpi_sci_ioapic_setup(intsrc->global_irq,
381                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
382                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
383                 return 0;
384         }
385
386         if (acpi_skip_timer_override &&
387             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
388                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
389                 return 0;
390         }
391
392         mp_override_legacy_irq(intsrc->source_irq,
393                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
394                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
395                                 intsrc->global_irq);
396
397         return 0;
398 }
399
400 static int __init
401 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
402 {
403         struct acpi_madt_nmi_source *nmi_src = NULL;
404
405         nmi_src = (struct acpi_madt_nmi_source *)header;
406
407         if (BAD_MADT_ENTRY(nmi_src, end))
408                 return -EINVAL;
409
410         acpi_table_print_madt_entry(header);
411
412         /* TBD: Support nimsrc entries? */
413
414         return 0;
415 }
416
417 #endif                          /* CONFIG_X86_IO_APIC */
418
419 /*
420  * acpi_pic_sci_set_trigger()
421  *
422  * use ELCR to set PIC-mode trigger type for SCI
423  *
424  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
425  * it may require Edge Trigger -- use "acpi_sci=edge"
426  *
427  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
428  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
429  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
430  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
431  */
432
433 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
434 {
435         unsigned int mask = 1 << irq;
436         unsigned int old, new;
437
438         /* Real old ELCR mask */
439         old = inb(0x4d0) | (inb(0x4d1) << 8);
440
441         /*
442          * If we use ACPI to set PCI irq's, then we should clear ELCR
443          * since we will set it correctly as we enable the PCI irq
444          * routing.
445          */
446         new = acpi_noirq ? old : 0;
447
448         /*
449          * Update SCI information in the ELCR, it isn't in the PCI
450          * routing tables..
451          */
452         switch (trigger) {
453         case 1:         /* Edge - clear */
454                 new &= ~mask;
455                 break;
456         case 3:         /* Level - set */
457                 new |= mask;
458                 break;
459         }
460
461         if (old == new)
462                 return;
463
464         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
465         outb(new, 0x4d0);
466         outb(new >> 8, 0x4d1);
467 }
468
469 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
470 {
471         *irq = gsi;
472         return 0;
473 }
474
475 /*
476  * success: return IRQ number (>=0)
477  * failure: return < 0
478  */
479 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
480 {
481         unsigned int irq;
482         unsigned int plat_gsi = gsi;
483
484 #ifdef CONFIG_PCI
485         /*
486          * Make sure all (legacy) PCI IRQs are set as level-triggered.
487          */
488         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
489                 extern void eisa_set_level_irq(unsigned int irq);
490
491                 if (triggering == ACPI_LEVEL_SENSITIVE)
492                         eisa_set_level_irq(gsi);
493         }
494 #endif
495
496 #ifdef CONFIG_X86_IO_APIC
497         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
498                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
499         }
500 #endif
501         acpi_gsi_to_irq(plat_gsi, &irq);
502         return irq;
503 }
504
505 EXPORT_SYMBOL(acpi_register_gsi);
506
507 /*
508  *  ACPI based hotplug support for CPU
509  */
510 #ifdef CONFIG_ACPI_HOTPLUG_CPU
511 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
512 {
513         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
514         union acpi_object *obj;
515         struct acpi_madt_local_apic *lapic;
516         cpumask_t tmp_map, new_map;
517         u8 physid;
518         int cpu;
519
520         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
521                 return -EINVAL;
522
523         if (!buffer.length || !buffer.pointer)
524                 return -EINVAL;
525
526         obj = buffer.pointer;
527         if (obj->type != ACPI_TYPE_BUFFER ||
528             obj->buffer.length < sizeof(*lapic)) {
529                 kfree(buffer.pointer);
530                 return -EINVAL;
531         }
532
533         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
534
535         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
536             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
537                 kfree(buffer.pointer);
538                 return -EINVAL;
539         }
540
541         physid = lapic->id;
542
543         kfree(buffer.pointer);
544         buffer.length = ACPI_ALLOCATE_BUFFER;
545         buffer.pointer = NULL;
546
547         tmp_map = cpu_present_map;
548         mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
549
550         /*
551          * If mp_register_lapic successfully generates a new logical cpu
552          * number, then the following will get us exactly what was mapped
553          */
554         cpus_andnot(new_map, cpu_present_map, tmp_map);
555         if (cpus_empty(new_map)) {
556                 printk ("Unable to map lapic to logical cpu number\n");
557                 return -EINVAL;
558         }
559
560         cpu = first_cpu(new_map);
561
562         *pcpu = cpu;
563         return 0;
564 }
565
566 EXPORT_SYMBOL(acpi_map_lsapic);
567
568 int acpi_unmap_lsapic(int cpu)
569 {
570         int i;
571
572         for_each_possible_cpu(i) {
573                 if (x86_acpiid_to_apicid[i] == x86_cpu_to_apicid[cpu]) {
574                         x86_acpiid_to_apicid[i] = -1;
575                         break;
576                 }
577         }
578         x86_cpu_to_apicid[cpu] = -1;
579         cpu_clear(cpu, cpu_present_map);
580         num_processors--;
581
582         return (0);
583 }
584
585 EXPORT_SYMBOL(acpi_unmap_lsapic);
586 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
587
588 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
589 {
590         /* TBD */
591         return -EINVAL;
592 }
593
594 EXPORT_SYMBOL(acpi_register_ioapic);
595
596 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
597 {
598         /* TBD */
599         return -EINVAL;
600 }
601
602 EXPORT_SYMBOL(acpi_unregister_ioapic);
603
604 static unsigned long __init
605 acpi_scan_rsdp(unsigned long start, unsigned long length)
606 {
607         unsigned long offset = 0;
608         unsigned long sig_len = sizeof("RSD PTR ") - 1;
609
610         /*
611          * Scan all 16-byte boundaries of the physical memory region for the
612          * RSDP signature.
613          */
614         for (offset = 0; offset < length; offset += 16) {
615                 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
616                         continue;
617                 return (start + offset);
618         }
619
620         return 0;
621 }
622
623 static int __init acpi_parse_sbf(struct acpi_table_header *table)
624 {
625         struct acpi_table_boot *sb;
626
627         sb = (struct acpi_table_boot *)table;
628         if (!sb) {
629                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
630                 return -ENODEV;
631         }
632
633         sbf_port = sb->cmos_index;      /* Save CMOS port */
634
635         return 0;
636 }
637
638 #ifdef CONFIG_HPET_TIMER
639
640 static int __init acpi_parse_hpet(struct acpi_table_header *table)
641 {
642         struct acpi_table_hpet *hpet_tbl;
643         struct resource *hpet_res;
644         resource_size_t res_start;
645
646         hpet_tbl = (struct acpi_table_hpet *)table;
647         if (!hpet_tbl) {
648                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
649                 return -ENODEV;
650         }
651
652         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
653                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
654                        "memory.\n");
655                 return -1;
656         }
657
658 #define HPET_RESOURCE_NAME_SIZE 9
659         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
660         if (hpet_res) {
661                 memset(hpet_res, 0, sizeof(*hpet_res));
662                 hpet_res->name = (void *)&hpet_res[1];
663                 hpet_res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
664                 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE,
665                          "HPET %u", hpet_tbl->sequence);
666                 hpet_res->end = (1 * 1024) - 1;
667         }
668
669 #ifdef CONFIG_X86_64
670         vxtime.hpet_address = hpet_tbl->address.address;
671
672         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
673                 hpet_tbl->id, vxtime.hpet_address);
674
675         res_start = vxtime.hpet_address;
676 #else                          /* X86 */
677         {
678                 extern unsigned long hpet_address;
679
680                 hpet_address = hpet_tbl->address.address;
681                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
682                         hpet_tbl->id, hpet_address);
683
684                 res_start = hpet_address;
685         }
686 #endif                         /* X86 */
687
688         if (hpet_res) {
689                 hpet_res->start = res_start;
690                 hpet_res->end += res_start;
691                 insert_resource(&iomem_resource, hpet_res);
692         }
693
694         return 0;
695 }
696 #else
697 #define acpi_parse_hpet NULL
698 #endif
699
700 #ifdef CONFIG_X86_PM_TIMER
701 extern u32 pmtmr_ioport;
702 #endif
703
704 static int __init acpi_parse_fadt(struct acpi_table_header *table)
705 {
706
707 #ifdef CONFIG_X86_PM_TIMER
708         /* detect the location of the ACPI PM Timer */
709         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
710                 /* FADT rev. 2 */
711                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
712                     ACPI_ADR_SPACE_SYSTEM_IO)
713                         return 0;
714
715                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
716                 /*
717                  * "X" fields are optional extensions to the original V1.0
718                  * fields, so we must selectively expand V1.0 fields if the
719                  * corresponding X field is zero.
720                  */
721                 if (!pmtmr_ioport)
722                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
723         } else {
724                 /* FADT rev. 1 */
725                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
726         }
727         if (pmtmr_ioport)
728                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
729                        pmtmr_ioport);
730 #endif
731         return 0;
732 }
733
734 unsigned long __init acpi_find_rsdp(void)
735 {
736         unsigned long rsdp_phys = 0;
737
738         if (efi_enabled) {
739                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
740                         return efi.acpi20;
741                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
742                         return efi.acpi;
743         }
744         /*
745          * Scan memory looking for the RSDP signature. First search EBDA (low
746          * memory) paragraphs and then search upper memory (E0000-FFFFF).
747          */
748         rsdp_phys = acpi_scan_rsdp(0, 0x400);
749         if (!rsdp_phys)
750                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
751
752         return rsdp_phys;
753 }
754
755 #ifdef  CONFIG_X86_LOCAL_APIC
756 /*
757  * Parse LAPIC entries in MADT
758  * returns 0 on success, < 0 on error
759  */
760 static int __init acpi_parse_madt_lapic_entries(void)
761 {
762         int count;
763
764         if (!cpu_has_apic)
765                 return -ENODEV;
766
767         /*
768          * Note that the LAPIC address is obtained from the MADT (32-bit value)
769          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
770          */
771
772         count =
773             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
774                                   acpi_parse_lapic_addr_ovr, 0);
775         if (count < 0) {
776                 printk(KERN_ERR PREFIX
777                        "Error parsing LAPIC address override entry\n");
778                 return count;
779         }
780
781         mp_register_lapic_address(acpi_lapic_addr);
782
783         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
784                                       MAX_APICS);
785         if (!count) {
786                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
787                 /* TBD: Cleanup to allow fallback to MPS */
788                 return -ENODEV;
789         } else if (count < 0) {
790                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
791                 /* TBD: Cleanup to allow fallback to MPS */
792                 return count;
793         }
794
795         count =
796             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
797         if (count < 0) {
798                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
799                 /* TBD: Cleanup to allow fallback to MPS */
800                 return count;
801         }
802         return 0;
803 }
804 #endif                          /* CONFIG_X86_LOCAL_APIC */
805
806 #ifdef  CONFIG_X86_IO_APIC
807 /*
808  * Parse IOAPIC related entries in MADT
809  * returns 0 on success, < 0 on error
810  */
811 static int __init acpi_parse_madt_ioapic_entries(void)
812 {
813         int count;
814
815         /*
816          * ACPI interpreter is required to complete interrupt setup,
817          * so if it is off, don't enumerate the io-apics with ACPI.
818          * If MPS is present, it will handle them,
819          * otherwise the system will stay in PIC mode
820          */
821         if (acpi_disabled || acpi_noirq) {
822                 return -ENODEV;
823         }
824
825         if (!cpu_has_apic)
826                 return -ENODEV;
827
828         /*
829          * if "noapic" boot option, don't look for IO-APICs
830          */
831         if (skip_ioapic_setup) {
832                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
833                        "due to 'noapic' option.\n");
834                 return -ENODEV;
835         }
836
837         count =
838             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
839                                   MAX_IO_APICS);
840         if (!count) {
841                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
842                 return -ENODEV;
843         } else if (count < 0) {
844                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
845                 return count;
846         }
847
848         count =
849             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
850                                   NR_IRQ_VECTORS);
851         if (count < 0) {
852                 printk(KERN_ERR PREFIX
853                        "Error parsing interrupt source overrides entry\n");
854                 /* TBD: Cleanup to allow fallback to MPS */
855                 return count;
856         }
857
858         /*
859          * If BIOS did not supply an INT_SRC_OVR for the SCI
860          * pretend we got one so we can set the SCI flags.
861          */
862         if (!acpi_sci_override_gsi)
863                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
864
865         /* Fill in identity legacy mapings where no override */
866         mp_config_acpi_legacy_irqs();
867
868         count =
869             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
870                                   NR_IRQ_VECTORS);
871         if (count < 0) {
872                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
873                 /* TBD: Cleanup to allow fallback to MPS */
874                 return count;
875         }
876
877         return 0;
878 }
879 #else
880 static inline int acpi_parse_madt_ioapic_entries(void)
881 {
882         return -1;
883 }
884 #endif  /* !CONFIG_X86_IO_APIC */
885
886 static void __init acpi_process_madt(void)
887 {
888 #ifdef CONFIG_X86_LOCAL_APIC
889         int count, error;
890
891         count = acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt);
892         if (count >= 1) {
893
894                 /*
895                  * Parse MADT LAPIC entries
896                  */
897                 error = acpi_parse_madt_lapic_entries();
898                 if (!error) {
899                         acpi_lapic = 1;
900
901 #ifdef CONFIG_X86_GENERICARCH
902                         generic_bigsmp_probe();
903 #endif
904                         /*
905                          * Parse MADT IO-APIC entries
906                          */
907                         error = acpi_parse_madt_ioapic_entries();
908                         if (!error) {
909                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
910                                 acpi_irq_balance_set(NULL);
911                                 acpi_ioapic = 1;
912
913                                 smp_found_config = 1;
914                                 clustered_apic_check();
915                         }
916                 }
917                 if (error == -EINVAL) {
918                         /*
919                          * Dell Precision Workstation 410, 610 come here.
920                          */
921                         printk(KERN_ERR PREFIX
922                                "Invalid BIOS MADT, disabling ACPI\n");
923                         disable_acpi();
924                 }
925         }
926 #endif
927         return;
928 }
929
930 #ifdef __i386__
931
932 static int __init disable_acpi_irq(struct dmi_system_id *d)
933 {
934         if (!acpi_force) {
935                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
936                        d->ident);
937                 acpi_noirq_set();
938         }
939         return 0;
940 }
941
942 static int __init disable_acpi_pci(struct dmi_system_id *d)
943 {
944         if (!acpi_force) {
945                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
946                        d->ident);
947                 acpi_disable_pci();
948         }
949         return 0;
950 }
951
952 static int __init dmi_disable_acpi(struct dmi_system_id *d)
953 {
954         if (!acpi_force) {
955                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
956                 disable_acpi();
957         } else {
958                 printk(KERN_NOTICE
959                        "Warning: DMI blacklist says broken, but acpi forced\n");
960         }
961         return 0;
962 }
963
964 /*
965  * Limit ACPI to CPU enumeration for HT
966  */
967 static int __init force_acpi_ht(struct dmi_system_id *d)
968 {
969         if (!acpi_force) {
970                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
971                        d->ident);
972                 disable_acpi();
973                 acpi_ht = 1;
974         } else {
975                 printk(KERN_NOTICE
976                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
977         }
978         return 0;
979 }
980
981 /*
982  * If your system is blacklisted here, but you find that acpi=force
983  * works for you, please contact acpi-devel@sourceforge.net
984  */
985 static struct dmi_system_id __initdata acpi_dmi_table[] = {
986         /*
987          * Boxes that need ACPI disabled
988          */
989         {
990          .callback = dmi_disable_acpi,
991          .ident = "IBM Thinkpad",
992          .matches = {
993                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
994                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
995                      },
996          },
997
998         /*
999          * Boxes that need acpi=ht
1000          */
1001         {
1002          .callback = force_acpi_ht,
1003          .ident = "FSC Primergy T850",
1004          .matches = {
1005                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1006                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1007                      },
1008          },
1009         {
1010          .callback = force_acpi_ht,
1011          .ident = "DELL GX240",
1012          .matches = {
1013                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
1014                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
1015                      },
1016          },
1017         {
1018          .callback = force_acpi_ht,
1019          .ident = "HP VISUALIZE NT Workstation",
1020          .matches = {
1021                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1022                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1023                      },
1024          },
1025         {
1026          .callback = force_acpi_ht,
1027          .ident = "Compaq Workstation W8000",
1028          .matches = {
1029                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1030                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1031                      },
1032          },
1033         {
1034          .callback = force_acpi_ht,
1035          .ident = "ASUS P4B266",
1036          .matches = {
1037                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1038                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1039                      },
1040          },
1041         {
1042          .callback = force_acpi_ht,
1043          .ident = "ASUS P2B-DS",
1044          .matches = {
1045                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1046                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1047                      },
1048          },
1049         {
1050          .callback = force_acpi_ht,
1051          .ident = "ASUS CUR-DLS",
1052          .matches = {
1053                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1054                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1055                      },
1056          },
1057         {
1058          .callback = force_acpi_ht,
1059          .ident = "ABIT i440BX-W83977",
1060          .matches = {
1061                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1062                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1063                      },
1064          },
1065         {
1066          .callback = force_acpi_ht,
1067          .ident = "IBM Bladecenter",
1068          .matches = {
1069                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1070                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1071                      },
1072          },
1073         {
1074          .callback = force_acpi_ht,
1075          .ident = "IBM eServer xSeries 360",
1076          .matches = {
1077                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1078                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1079                      },
1080          },
1081         {
1082          .callback = force_acpi_ht,
1083          .ident = "IBM eserver xSeries 330",
1084          .matches = {
1085                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1086                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1087                      },
1088          },
1089         {
1090          .callback = force_acpi_ht,
1091          .ident = "IBM eserver xSeries 440",
1092          .matches = {
1093                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1094                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1095                      },
1096          },
1097
1098         /*
1099          * Boxes that need ACPI PCI IRQ routing disabled
1100          */
1101         {
1102          .callback = disable_acpi_irq,
1103          .ident = "ASUS A7V",
1104          .matches = {
1105                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1106                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1107                      /* newer BIOS, Revision 1011, does work */
1108                      DMI_MATCH(DMI_BIOS_VERSION,
1109                                "ASUS A7V ACPI BIOS Revision 1007"),
1110                      },
1111          },
1112
1113         /*
1114          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1115          */
1116         {                       /* _BBN 0 bug */
1117          .callback = disable_acpi_pci,
1118          .ident = "ASUS PR-DLS",
1119          .matches = {
1120                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1121                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1122                      DMI_MATCH(DMI_BIOS_VERSION,
1123                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1124                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1125                      },
1126          },
1127         {
1128          .callback = disable_acpi_pci,
1129          .ident = "Acer TravelMate 36x Laptop",
1130          .matches = {
1131                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1132                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1133                      },
1134          },
1135         {}
1136 };
1137
1138 #endif                          /* __i386__ */
1139
1140 /*
1141  * acpi_boot_table_init() and acpi_boot_init()
1142  *  called from setup_arch(), always.
1143  *      1. checksums all tables
1144  *      2. enumerates lapics
1145  *      3. enumerates io-apics
1146  *
1147  * acpi_table_init() is separate to allow reading SRAT without
1148  * other side effects.
1149  *
1150  * side effects of acpi_boot_init:
1151  *      acpi_lapic = 1 if LAPIC found
1152  *      acpi_ioapic = 1 if IOAPIC found
1153  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1154  *      if acpi_blacklisted() acpi_disabled = 1;
1155  *      acpi_irq_model=...
1156  *      ...
1157  *
1158  * return value: (currently ignored)
1159  *      0: success
1160  *      !0: failure
1161  */
1162
1163 int __init acpi_boot_table_init(void)
1164 {
1165         int error;
1166
1167 #ifdef __i386__
1168         dmi_check_system(acpi_dmi_table);
1169 #endif
1170
1171         /*
1172          * If acpi_disabled, bail out
1173          * One exception: acpi=ht continues far enough to enumerate LAPICs
1174          */
1175         if (acpi_disabled && !acpi_ht)
1176                 return 1;
1177
1178         /*
1179          * Initialize the ACPI boot-time table parser.
1180          */
1181         error = acpi_table_init();
1182         if (error) {
1183                 disable_acpi();
1184                 return error;
1185         }
1186
1187         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1188
1189         /*
1190          * blacklist may disable ACPI entirely
1191          */
1192         error = acpi_blacklisted();
1193         if (error) {
1194                 if (acpi_force) {
1195                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1196                 } else {
1197                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1198                         disable_acpi();
1199                         return error;
1200                 }
1201         }
1202
1203         return 0;
1204 }
1205
1206 int __init acpi_boot_init(void)
1207 {
1208         /*
1209          * If acpi_disabled, bail out
1210          * One exception: acpi=ht continues far enough to enumerate LAPICs
1211          */
1212         if (acpi_disabled && !acpi_ht)
1213                 return 1;
1214
1215         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1216
1217         /*
1218          * set sci_int and PM timer address
1219          */
1220         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1221
1222         /*
1223          * Process the Multiple APIC Description Table (MADT), if present
1224          */
1225         acpi_process_madt();
1226
1227         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1228
1229         return 0;
1230 }
1231
1232 static int __init parse_acpi(char *arg)
1233 {
1234         if (!arg)
1235                 return -EINVAL;
1236
1237         /* "acpi=off" disables both ACPI table parsing and interpreter */
1238         if (strcmp(arg, "off") == 0) {
1239                 disable_acpi();
1240         }
1241         /* acpi=force to over-ride black-list */
1242         else if (strcmp(arg, "force") == 0) {
1243                 acpi_force = 1;
1244                 acpi_ht = 1;
1245                 acpi_disabled = 0;
1246         }
1247         /* acpi=strict disables out-of-spec workarounds */
1248         else if (strcmp(arg, "strict") == 0) {
1249                 acpi_strict = 1;
1250         }
1251         /* Limit ACPI just to boot-time to enable HT */
1252         else if (strcmp(arg, "ht") == 0) {
1253                 if (!acpi_force)
1254                         disable_acpi();
1255                 acpi_ht = 1;
1256         }
1257         /* "acpi=noirq" disables ACPI interrupt routing */
1258         else if (strcmp(arg, "noirq") == 0) {
1259                 acpi_noirq_set();
1260         } else {
1261                 /* Core will printk when we return error. */
1262                 return -EINVAL;
1263         }
1264         return 0;
1265 }
1266 early_param("acpi", parse_acpi);
1267
1268 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1269 static int __init parse_pci(char *arg)
1270 {
1271         if (arg && strcmp(arg, "noacpi") == 0)
1272                 acpi_disable_pci();
1273         return 0;
1274 }
1275 early_param("pci", parse_pci);
1276
1277 #ifdef CONFIG_X86_IO_APIC
1278 static int __init parse_acpi_skip_timer_override(char *arg)
1279 {
1280         acpi_skip_timer_override = 1;
1281         return 0;
1282 }
1283 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1284
1285 static int __init parse_acpi_use_timer_override(char *arg)
1286 {
1287         acpi_use_timer_override = 1;
1288         return 0;
1289 }
1290 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1291 #endif /* CONFIG_X86_IO_APIC */
1292
1293 static int __init setup_acpi_sci(char *s)
1294 {
1295         if (!s)
1296                 return -EINVAL;
1297         if (!strcmp(s, "edge"))
1298                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1299                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1300         else if (!strcmp(s, "level"))
1301                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1302                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1303         else if (!strcmp(s, "high"))
1304                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1305                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1306         else if (!strcmp(s, "low"))
1307                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1308                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1309         else
1310                 return -EINVAL;
1311         return 0;
1312 }
1313 early_param("acpi_sci", setup_acpi_sci);
1314
1315 int __acpi_acquire_global_lock(unsigned int *lock)
1316 {
1317         unsigned int old, new, val;
1318         do {
1319                 old = *lock;
1320                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1321                 val = cmpxchg(lock, old, new);
1322         } while (unlikely (val != old));
1323         return (new < 3) ? -1 : 0;
1324 }
1325
1326 int __acpi_release_global_lock(unsigned int *lock)
1327 {
1328         unsigned int old, new, val;
1329         do {
1330                 old = *lock;
1331                 new = old & ~0x3;
1332                 val = cmpxchg(lock, old, new);
1333         } while (unlikely (val != old));
1334         return old & 0x1;
1335 }