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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/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/bootmem.h>
35 #include <linux/ioport.h>
36
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
39 #include <asm/apic.h>
40 #include <asm/io.h>
41 #include <asm/mpspec.h>
42
43 #ifdef CONFIG_X86_LOCAL_APIC
44 # include <mach_apic.h>
45 #endif
46
47 static int __initdata acpi_force = 0;
48
49 #ifdef  CONFIG_ACPI
50 int acpi_disabled = 0;
51 #else
52 int acpi_disabled = 1;
53 #endif
54 EXPORT_SYMBOL(acpi_disabled);
55
56 #ifdef  CONFIG_X86_64
57
58 #include <asm/proto.h>
59 #include <asm/genapic.h>
60
61 #else                           /* X86 */
62
63 #ifdef  CONFIG_X86_LOCAL_APIC
64 #include <mach_apic.h>
65 #include <mach_mpparse.h>
66 #endif                          /* CONFIG_X86_LOCAL_APIC */
67
68 #endif                          /* X86 */
69
70 #define BAD_MADT_ENTRY(entry, end) (                                        \
71                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
72                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
73
74 #define PREFIX                  "ACPI: "
75
76 int acpi_noirq;                         /* skip ACPI IRQ initialization */
77 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
78 EXPORT_SYMBOL(acpi_pci_disabled);
79 int acpi_ht __initdata = 1;     /* enable HT */
80
81 int acpi_lapic;
82 int acpi_ioapic;
83 int acpi_strict;
84
85 u8 acpi_sci_flags __initdata;
86 int acpi_sci_override_gsi __initdata;
87 int acpi_skip_timer_override __initdata;
88 int acpi_use_timer_override __initdata;
89
90 #ifdef CONFIG_X86_LOCAL_APIC
91 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
92 #endif
93
94 #ifndef __HAVE_ARCH_CMPXCHG
95 #warning ACPI uses CMPXCHG, i486 and later hardware
96 #endif
97
98 /* --------------------------------------------------------------------------
99                               Boot-time Configuration
100    -------------------------------------------------------------------------- */
101
102 /*
103  * The default interrupt routing model is PIC (8259).  This gets
104  * overridden if IOAPICs are enumerated (below).
105  */
106 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
107
108 #ifdef  CONFIG_X86_64
109
110 /* rely on all ACPI tables being in the direct mapping */
111 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
112 {
113         if (!phys_addr || !size)
114                 return NULL;
115
116         if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE)
117                 return __va(phys_addr);
118
119         return NULL;
120 }
121
122 #else
123
124 /*
125  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
126  * to map the target physical address. The problem is that set_fixmap()
127  * provides a single page, and it is possible that the page is not
128  * sufficient.
129  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
130  * i.e. until the next __va_range() call.
131  *
132  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
133  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
134  * count idx down while incrementing the phys address.
135  */
136 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
137 {
138         unsigned long base, offset, mapped_size;
139         int idx;
140
141         if (phys + size < 8 * 1024 * 1024)
142                 return __va(phys);
143
144         offset = phys & (PAGE_SIZE - 1);
145         mapped_size = PAGE_SIZE - offset;
146         set_fixmap(FIX_ACPI_END, phys);
147         base = fix_to_virt(FIX_ACPI_END);
148
149         /*
150          * Most cases can be covered by the below.
151          */
152         idx = FIX_ACPI_END;
153         while (mapped_size < size) {
154                 if (--idx < FIX_ACPI_BEGIN)
155                         return NULL;    /* cannot handle this */
156                 phys += PAGE_SIZE;
157                 set_fixmap(idx, phys);
158                 mapped_size += PAGE_SIZE;
159         }
160
161         return ((unsigned char *)base + offset);
162 }
163 #endif
164
165 #ifdef CONFIG_PCI_MMCONFIG
166 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
167 struct acpi_mcfg_allocation *pci_mmcfg_config;
168 int pci_mmcfg_config_num;
169
170 int __init acpi_parse_mcfg(struct acpi_table_header *header)
171 {
172         struct acpi_table_mcfg *mcfg;
173         unsigned long i;
174         int config_size;
175
176         if (!header)
177                 return -EINVAL;
178
179         mcfg = (struct acpi_table_mcfg *)header;
180
181         /* how many config structures do we have */
182         pci_mmcfg_config_num = 0;
183         i = header->length - sizeof(struct acpi_table_mcfg);
184         while (i >= sizeof(struct acpi_mcfg_allocation)) {
185                 ++pci_mmcfg_config_num;
186                 i -= sizeof(struct acpi_mcfg_allocation);
187         };
188         if (pci_mmcfg_config_num == 0) {
189                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
190                 return -ENODEV;
191         }
192
193         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
194         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
195         if (!pci_mmcfg_config) {
196                 printk(KERN_WARNING PREFIX
197                        "No memory for MCFG config tables\n");
198                 return -ENOMEM;
199         }
200
201         memcpy(pci_mmcfg_config, &mcfg[1], config_size);
202         for (i = 0; i < pci_mmcfg_config_num; ++i) {
203                 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
204                         printk(KERN_ERR PREFIX
205                                "MMCONFIG not in low 4GB of memory\n");
206                         kfree(pci_mmcfg_config);
207                         pci_mmcfg_config_num = 0;
208                         return -ENODEV;
209                 }
210         }
211
212         return 0;
213 }
214 #endif                          /* CONFIG_PCI_MMCONFIG */
215
216 #ifdef CONFIG_X86_LOCAL_APIC
217 static int __init acpi_parse_madt(struct acpi_table_header *table)
218 {
219         struct acpi_table_madt *madt = NULL;
220
221         if (!cpu_has_apic)
222                 return -EINVAL;
223
224         madt = (struct acpi_table_madt *)table;
225         if (!madt) {
226                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
227                 return -ENODEV;
228         }
229
230         if (madt->address) {
231                 acpi_lapic_addr = (u64) madt->address;
232
233                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
234                        madt->address);
235         }
236
237         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
238
239         return 0;
240 }
241
242 static int __init
243 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
244 {
245         struct acpi_madt_local_apic *processor = NULL;
246
247         processor = (struct acpi_madt_local_apic *)header;
248
249         if (BAD_MADT_ENTRY(processor, end))
250                 return -EINVAL;
251
252         acpi_table_print_madt_entry(header);
253
254         /*
255          * We need to register disabled CPU as well to permit
256          * counting disabled CPUs. This allows us to size
257          * cpus_possible_map more accurately, to permit
258          * to not preallocating memory for all NR_CPUS
259          * when we use CPU hotplug.
260          */
261         mp_register_lapic(processor->id,        /* APIC ID */
262                           processor->lapic_flags & ACPI_MADT_ENABLED);  /* Enabled? */
263
264         return 0;
265 }
266
267 static int __init
268 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
269 {
270         struct acpi_madt_local_sapic *processor = NULL;
271
272         processor = (struct acpi_madt_local_sapic *)header;
273
274         if (BAD_MADT_ENTRY(processor, end))
275                 return -EINVAL;
276
277         acpi_table_print_madt_entry(header);
278
279         mp_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
280                 processor->lapic_flags & ACPI_MADT_ENABLED);    /* Enabled? */
281
282         return 0;
283 }
284
285 static int __init
286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
287                           const unsigned long end)
288 {
289         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
290
291         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
292
293         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
294                 return -EINVAL;
295
296         acpi_lapic_addr = lapic_addr_ovr->address;
297
298         return 0;
299 }
300
301 static int __init
302 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
303 {
304         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
305
306         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
307
308         if (BAD_MADT_ENTRY(lapic_nmi, end))
309                 return -EINVAL;
310
311         acpi_table_print_madt_entry(header);
312
313         if (lapic_nmi->lint != 1)
314                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
315
316         return 0;
317 }
318
319 #endif                          /*CONFIG_X86_LOCAL_APIC */
320
321 #ifdef CONFIG_X86_IO_APIC
322
323 struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
324
325 static int __init
326 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
327 {
328         struct acpi_madt_io_apic *ioapic = NULL;
329
330         ioapic = (struct acpi_madt_io_apic *)header;
331
332         if (BAD_MADT_ENTRY(ioapic, end))
333                 return -EINVAL;
334
335         acpi_table_print_madt_entry(header);
336
337         mp_register_ioapic(ioapic->id,
338                            ioapic->address, ioapic->global_irq_base);
339
340         return 0;
341 }
342
343 /*
344  * Parse Interrupt Source Override for the ACPI SCI
345  */
346 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
347 {
348         if (trigger == 0)       /* compatible SCI trigger is level */
349                 trigger = 3;
350
351         if (polarity == 0)      /* compatible SCI polarity is low */
352                 polarity = 3;
353
354         /* Command-line over-ride via acpi_sci= */
355         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
356                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
357
358         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
359                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
360
361         /*
362          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
363          * If GSI is < 16, this will update its flags,
364          * else it will create a new mp_irqs[] entry.
365          */
366         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
367
368         /*
369          * stash over-ride to indicate we've been here
370          * and for later update of acpi_gbl_FADT
371          */
372         acpi_sci_override_gsi = gsi;
373         return;
374 }
375
376 static int __init
377 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
378                        const unsigned long end)
379 {
380         struct acpi_madt_interrupt_override *intsrc = NULL;
381
382         intsrc = (struct acpi_madt_interrupt_override *)header;
383
384         if (BAD_MADT_ENTRY(intsrc, end))
385                 return -EINVAL;
386
387         acpi_table_print_madt_entry(header);
388
389         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
390                 acpi_sci_ioapic_setup(intsrc->global_irq,
391                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
392                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
393                 return 0;
394         }
395
396         if (acpi_skip_timer_override &&
397             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
398                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
399                 return 0;
400         }
401
402         mp_override_legacy_irq(intsrc->source_irq,
403                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
404                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
405                                 intsrc->global_irq);
406
407         return 0;
408 }
409
410 static int __init
411 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
412 {
413         struct acpi_madt_nmi_source *nmi_src = NULL;
414
415         nmi_src = (struct acpi_madt_nmi_source *)header;
416
417         if (BAD_MADT_ENTRY(nmi_src, end))
418                 return -EINVAL;
419
420         acpi_table_print_madt_entry(header);
421
422         /* TBD: Support nimsrc entries? */
423
424         return 0;
425 }
426
427 #endif                          /* CONFIG_X86_IO_APIC */
428
429 /*
430  * acpi_pic_sci_set_trigger()
431  *
432  * use ELCR to set PIC-mode trigger type for SCI
433  *
434  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
435  * it may require Edge Trigger -- use "acpi_sci=edge"
436  *
437  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
438  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
439  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
440  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
441  */
442
443 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
444 {
445         unsigned int mask = 1 << irq;
446         unsigned int old, new;
447
448         /* Real old ELCR mask */
449         old = inb(0x4d0) | (inb(0x4d1) << 8);
450
451         /*
452          * If we use ACPI to set PCI IRQs, then we should clear ELCR
453          * since we will set it correctly as we enable the PCI irq
454          * routing.
455          */
456         new = acpi_noirq ? old : 0;
457
458         /*
459          * Update SCI information in the ELCR, it isn't in the PCI
460          * routing tables..
461          */
462         switch (trigger) {
463         case 1:         /* Edge - clear */
464                 new &= ~mask;
465                 break;
466         case 3:         /* Level - set */
467                 new |= mask;
468                 break;
469         }
470
471         if (old == new)
472                 return;
473
474         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
475         outb(new, 0x4d0);
476         outb(new >> 8, 0x4d1);
477 }
478
479 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
480 {
481         *irq = gsi;
482         return 0;
483 }
484
485 /*
486  * success: return IRQ number (>=0)
487  * failure: return < 0
488  */
489 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
490 {
491         unsigned int irq;
492         unsigned int plat_gsi = gsi;
493
494 #ifdef CONFIG_PCI
495         /*
496          * Make sure all (legacy) PCI IRQs are set as level-triggered.
497          */
498         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
499                 extern void eisa_set_level_irq(unsigned int irq);
500
501                 if (triggering == ACPI_LEVEL_SENSITIVE)
502                         eisa_set_level_irq(gsi);
503         }
504 #endif
505
506 #ifdef CONFIG_X86_IO_APIC
507         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
508                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
509         }
510 #endif
511         acpi_gsi_to_irq(plat_gsi, &irq);
512         return irq;
513 }
514
515 /*
516  *  ACPI based hotplug support for CPU
517  */
518 #ifdef CONFIG_ACPI_HOTPLUG_CPU
519
520 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
521 {
522         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
523         union acpi_object *obj;
524         struct acpi_madt_local_apic *lapic;
525         cpumask_t tmp_map, new_map;
526         u8 physid;
527         int cpu;
528
529         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
530                 return -EINVAL;
531
532         if (!buffer.length || !buffer.pointer)
533                 return -EINVAL;
534
535         obj = buffer.pointer;
536         if (obj->type != ACPI_TYPE_BUFFER ||
537             obj->buffer.length < sizeof(*lapic)) {
538                 kfree(buffer.pointer);
539                 return -EINVAL;
540         }
541
542         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
543
544         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
545             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
546                 kfree(buffer.pointer);
547                 return -EINVAL;
548         }
549
550         physid = lapic->id;
551
552         kfree(buffer.pointer);
553         buffer.length = ACPI_ALLOCATE_BUFFER;
554         buffer.pointer = NULL;
555
556         tmp_map = cpu_present_map;
557         mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
558
559         /*
560          * If mp_register_lapic successfully generates a new logical cpu
561          * number, then the following will get us exactly what was mapped
562          */
563         cpus_andnot(new_map, cpu_present_map, tmp_map);
564         if (cpus_empty(new_map)) {
565                 printk ("Unable to map lapic to logical cpu number\n");
566                 return -EINVAL;
567         }
568
569         cpu = first_cpu(new_map);
570
571         *pcpu = cpu;
572         return 0;
573 }
574
575 /* wrapper to silence section mismatch warning */
576 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
577 {
578         return _acpi_map_lsapic(handle, pcpu);
579 }
580 EXPORT_SYMBOL(acpi_map_lsapic);
581
582 int acpi_unmap_lsapic(int cpu)
583 {
584         per_cpu(x86_cpu_to_apicid, cpu) = -1;
585         cpu_clear(cpu, cpu_present_map);
586         num_processors--;
587
588         return (0);
589 }
590
591 EXPORT_SYMBOL(acpi_unmap_lsapic);
592 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
593
594 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
595 {
596         /* TBD */
597         return -EINVAL;
598 }
599
600 EXPORT_SYMBOL(acpi_register_ioapic);
601
602 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
603 {
604         /* TBD */
605         return -EINVAL;
606 }
607
608 EXPORT_SYMBOL(acpi_unregister_ioapic);
609
610 static int __init acpi_parse_sbf(struct acpi_table_header *table)
611 {
612         struct acpi_table_boot *sb;
613
614         sb = (struct acpi_table_boot *)table;
615         if (!sb) {
616                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
617                 return -ENODEV;
618         }
619
620         sbf_port = sb->cmos_index;      /* Save CMOS port */
621
622         return 0;
623 }
624
625 #ifdef CONFIG_HPET_TIMER
626 #include <asm/hpet.h>
627
628 static struct __initdata resource *hpet_res;
629
630 static int __init acpi_parse_hpet(struct acpi_table_header *table)
631 {
632         struct acpi_table_hpet *hpet_tbl;
633
634         hpet_tbl = (struct acpi_table_hpet *)table;
635         if (!hpet_tbl) {
636                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
637                 return -ENODEV;
638         }
639
640         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
641                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
642                        "memory.\n");
643                 return -1;
644         }
645
646         hpet_address = hpet_tbl->address.address;
647
648         /*
649          * Some broken BIOSes advertise HPET at 0x0. We really do not
650          * want to allocate a resource there.
651          */
652         if (!hpet_address) {
653                 printk(KERN_WARNING PREFIX
654                        "HPET id: %#x base: %#lx is invalid\n",
655                        hpet_tbl->id, hpet_address);
656                 return 0;
657         }
658 #ifdef CONFIG_X86_64
659         /*
660          * Some even more broken BIOSes advertise HPET at
661          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
662          * some noise:
663          */
664         if (hpet_address == 0xfed0000000000000UL) {
665                 if (!hpet_force_user) {
666                         printk(KERN_WARNING PREFIX "HPET id: %#x "
667                                "base: 0xfed0000000000000 is bogus\n "
668                                "try hpet=force on the kernel command line to "
669                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
670                         hpet_address = 0;
671                         return 0;
672                 }
673                 printk(KERN_WARNING PREFIX
674                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
675                        "to 0xfed00000.\n", hpet_tbl->id);
676                 hpet_address >>= 32;
677         }
678 #endif
679         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
680                hpet_tbl->id, hpet_address);
681
682         /*
683          * Allocate and initialize the HPET firmware resource for adding into
684          * the resource tree during the lateinit timeframe.
685          */
686 #define HPET_RESOURCE_NAME_SIZE 9
687         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
688
689         if (!hpet_res)
690                 return 0;
691
692         memset(hpet_res, 0, sizeof(*hpet_res));
693         hpet_res->name = (void *)&hpet_res[1];
694         hpet_res->flags = IORESOURCE_MEM;
695         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
696                  hpet_tbl->sequence);
697
698         hpet_res->start = hpet_address;
699         hpet_res->end = hpet_address + (1 * 1024) - 1;
700
701         return 0;
702 }
703
704 /*
705  * hpet_insert_resource inserts the HPET resources used into the resource
706  * tree.
707  */
708 static __init int hpet_insert_resource(void)
709 {
710         if (!hpet_res)
711                 return 1;
712
713         return insert_resource(&iomem_resource, hpet_res);
714 }
715
716 late_initcall(hpet_insert_resource);
717
718 #else
719 #define acpi_parse_hpet NULL
720 #endif
721
722 static int __init acpi_parse_fadt(struct acpi_table_header *table)
723 {
724
725 #ifdef CONFIG_X86_PM_TIMER
726         /* detect the location of the ACPI PM Timer */
727         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
728                 /* FADT rev. 2 */
729                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
730                     ACPI_ADR_SPACE_SYSTEM_IO)
731                         return 0;
732
733                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
734                 /*
735                  * "X" fields are optional extensions to the original V1.0
736                  * fields, so we must selectively expand V1.0 fields if the
737                  * corresponding X field is zero.
738                  */
739                 if (!pmtmr_ioport)
740                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
741         } else {
742                 /* FADT rev. 1 */
743                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
744         }
745         if (pmtmr_ioport)
746                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
747                        pmtmr_ioport);
748 #endif
749         return 0;
750 }
751
752 #ifdef  CONFIG_X86_LOCAL_APIC
753 /*
754  * Parse LAPIC entries in MADT
755  * returns 0 on success, < 0 on error
756  */
757 static int __init acpi_parse_madt_lapic_entries(void)
758 {
759         int count;
760
761         if (!cpu_has_apic)
762                 return -ENODEV;
763
764         /*
765          * Note that the LAPIC address is obtained from the MADT (32-bit value)
766          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
767          */
768
769         count =
770             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
771                                   acpi_parse_lapic_addr_ovr, 0);
772         if (count < 0) {
773                 printk(KERN_ERR PREFIX
774                        "Error parsing LAPIC address override entry\n");
775                 return count;
776         }
777
778         mp_register_lapic_address(acpi_lapic_addr);
779
780         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
781                                       acpi_parse_sapic, MAX_APICS);
782
783         if (!count)
784                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
785                                               acpi_parse_lapic, MAX_APICS);
786         if (!count) {
787                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
788                 /* TBD: Cleanup to allow fallback to MPS */
789                 return -ENODEV;
790         } else if (count < 0) {
791                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
792                 /* TBD: Cleanup to allow fallback to MPS */
793                 return count;
794         }
795
796         count =
797             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
798         if (count < 0) {
799                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
800                 /* TBD: Cleanup to allow fallback to MPS */
801                 return count;
802         }
803         return 0;
804 }
805 #endif                          /* CONFIG_X86_LOCAL_APIC */
806
807 #ifdef  CONFIG_X86_IO_APIC
808 /*
809  * Parse IOAPIC related entries in MADT
810  * returns 0 on success, < 0 on error
811  */
812 static int __init acpi_parse_madt_ioapic_entries(void)
813 {
814         int count;
815
816         /*
817          * ACPI interpreter is required to complete interrupt setup,
818          * so if it is off, don't enumerate the io-apics with ACPI.
819          * If MPS is present, it will handle them,
820          * otherwise the system will stay in PIC mode
821          */
822         if (acpi_disabled || acpi_noirq) {
823                 return -ENODEV;
824         }
825
826         if (!cpu_has_apic)
827                 return -ENODEV;
828
829         /*
830          * if "noapic" boot option, don't look for IO-APICs
831          */
832         if (skip_ioapic_setup) {
833                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
834                        "due to 'noapic' option.\n");
835                 return -ENODEV;
836         }
837
838         count =
839             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
840                                   MAX_IO_APICS);
841         if (!count) {
842                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
843                 return -ENODEV;
844         } else if (count < 0) {
845                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
846                 return count;
847         }
848
849         count =
850             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
851                                   NR_IRQ_VECTORS);
852         if (count < 0) {
853                 printk(KERN_ERR PREFIX
854                        "Error parsing interrupt source overrides entry\n");
855                 /* TBD: Cleanup to allow fallback to MPS */
856                 return count;
857         }
858
859         /*
860          * If BIOS did not supply an INT_SRC_OVR for the SCI
861          * pretend we got one so we can set the SCI flags.
862          */
863         if (!acpi_sci_override_gsi)
864                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
865
866         /* Fill in identity legacy mapings where no override */
867         mp_config_acpi_legacy_irqs();
868
869         count =
870             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
871                                   NR_IRQ_VECTORS);
872         if (count < 0) {
873                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
874                 /* TBD: Cleanup to allow fallback to MPS */
875                 return count;
876         }
877
878         return 0;
879 }
880 #else
881 static inline int acpi_parse_madt_ioapic_entries(void)
882 {
883         return -1;
884 }
885 #endif  /* !CONFIG_X86_IO_APIC */
886
887 static void __init acpi_process_madt(void)
888 {
889 #ifdef CONFIG_X86_LOCAL_APIC
890         int error;
891
892         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
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                                 setup_apic_routing();
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(const 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(const 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(const 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(const 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 = "HP VISUALIZE NT Workstation",
1012          .matches = {
1013                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1014                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1015                      },
1016          },
1017         {
1018          .callback = force_acpi_ht,
1019          .ident = "Compaq Workstation W8000",
1020          .matches = {
1021                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1022                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1023                      },
1024          },
1025         {
1026          .callback = force_acpi_ht,
1027          .ident = "ASUS P4B266",
1028          .matches = {
1029                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1030                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1031                      },
1032          },
1033         {
1034          .callback = force_acpi_ht,
1035          .ident = "ASUS P2B-DS",
1036          .matches = {
1037                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1038                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1039                      },
1040          },
1041         {
1042          .callback = force_acpi_ht,
1043          .ident = "ASUS CUR-DLS",
1044          .matches = {
1045                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1046                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1047                      },
1048          },
1049         {
1050          .callback = force_acpi_ht,
1051          .ident = "ABIT i440BX-W83977",
1052          .matches = {
1053                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1054                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1055                      },
1056          },
1057         {
1058          .callback = force_acpi_ht,
1059          .ident = "IBM Bladecenter",
1060          .matches = {
1061                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1062                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1063                      },
1064          },
1065         {
1066          .callback = force_acpi_ht,
1067          .ident = "IBM eServer xSeries 360",
1068          .matches = {
1069                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1070                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1071                      },
1072          },
1073         {
1074          .callback = force_acpi_ht,
1075          .ident = "IBM eserver xSeries 330",
1076          .matches = {
1077                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1078                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1079                      },
1080          },
1081         {
1082          .callback = force_acpi_ht,
1083          .ident = "IBM eserver xSeries 440",
1084          .matches = {
1085                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1086                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1087                      },
1088          },
1089
1090         /*
1091          * Boxes that need ACPI PCI IRQ routing disabled
1092          */
1093         {
1094          .callback = disable_acpi_irq,
1095          .ident = "ASUS A7V",
1096          .matches = {
1097                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1098                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1099                      /* newer BIOS, Revision 1011, does work */
1100                      DMI_MATCH(DMI_BIOS_VERSION,
1101                                "ASUS A7V ACPI BIOS Revision 1007"),
1102                      },
1103          },
1104         {
1105                 /*
1106                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1107                  * for LPC bridge, which is needed for the PCI
1108                  * interrupt links to work. DSDT fix is in bug 5966.
1109                  * 2645, 2646 model numbers are shared with 600/600E/600X
1110                  */
1111          .callback = disable_acpi_irq,
1112          .ident = "IBM Thinkpad 600 Series 2645",
1113          .matches = {
1114                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1115                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1116                      },
1117          },
1118         {
1119          .callback = disable_acpi_irq,
1120          .ident = "IBM Thinkpad 600 Series 2646",
1121          .matches = {
1122                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1123                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1124                      },
1125          },
1126         /*
1127          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1128          */
1129         {                       /* _BBN 0 bug */
1130          .callback = disable_acpi_pci,
1131          .ident = "ASUS PR-DLS",
1132          .matches = {
1133                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1134                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1135                      DMI_MATCH(DMI_BIOS_VERSION,
1136                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1137                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1138                      },
1139          },
1140         {
1141          .callback = disable_acpi_pci,
1142          .ident = "Acer TravelMate 36x Laptop",
1143          .matches = {
1144                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1145                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1146                      },
1147          },
1148         {}
1149 };
1150
1151 #endif                          /* __i386__ */
1152
1153 /*
1154  * acpi_boot_table_init() and acpi_boot_init()
1155  *  called from setup_arch(), always.
1156  *      1. checksums all tables
1157  *      2. enumerates lapics
1158  *      3. enumerates io-apics
1159  *
1160  * acpi_table_init() is separate to allow reading SRAT without
1161  * other side effects.
1162  *
1163  * side effects of acpi_boot_init:
1164  *      acpi_lapic = 1 if LAPIC found
1165  *      acpi_ioapic = 1 if IOAPIC found
1166  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1167  *      if acpi_blacklisted() acpi_disabled = 1;
1168  *      acpi_irq_model=...
1169  *      ...
1170  *
1171  * return value: (currently ignored)
1172  *      0: success
1173  *      !0: failure
1174  */
1175
1176 int __init acpi_boot_table_init(void)
1177 {
1178         int error;
1179
1180 #ifdef __i386__
1181         dmi_check_system(acpi_dmi_table);
1182 #endif
1183
1184         /*
1185          * If acpi_disabled, bail out
1186          * One exception: acpi=ht continues far enough to enumerate LAPICs
1187          */
1188         if (acpi_disabled && !acpi_ht)
1189                 return 1;
1190
1191         /*
1192          * Initialize the ACPI boot-time table parser.
1193          */
1194         error = acpi_table_init();
1195         if (error) {
1196                 disable_acpi();
1197                 return error;
1198         }
1199
1200         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1201
1202         /*
1203          * blacklist may disable ACPI entirely
1204          */
1205         error = acpi_blacklisted();
1206         if (error) {
1207                 if (acpi_force) {
1208                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1209                 } else {
1210                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1211                         disable_acpi();
1212                         return error;
1213                 }
1214         }
1215
1216         return 0;
1217 }
1218
1219 int __init acpi_boot_init(void)
1220 {
1221         /*
1222          * If acpi_disabled, bail out
1223          * One exception: acpi=ht continues far enough to enumerate LAPICs
1224          */
1225         if (acpi_disabled && !acpi_ht)
1226                 return 1;
1227
1228         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1229
1230         /*
1231          * set sci_int and PM timer address
1232          */
1233         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1234
1235         /*
1236          * Process the Multiple APIC Description Table (MADT), if present
1237          */
1238         acpi_process_madt();
1239
1240         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1241
1242         return 0;
1243 }
1244
1245 static int __init parse_acpi(char *arg)
1246 {
1247         if (!arg)
1248                 return -EINVAL;
1249
1250         /* "acpi=off" disables both ACPI table parsing and interpreter */
1251         if (strcmp(arg, "off") == 0) {
1252                 disable_acpi();
1253         }
1254         /* acpi=force to over-ride black-list */
1255         else if (strcmp(arg, "force") == 0) {
1256                 acpi_force = 1;
1257                 acpi_ht = 1;
1258                 acpi_disabled = 0;
1259         }
1260         /* acpi=strict disables out-of-spec workarounds */
1261         else if (strcmp(arg, "strict") == 0) {
1262                 acpi_strict = 1;
1263         }
1264         /* Limit ACPI just to boot-time to enable HT */
1265         else if (strcmp(arg, "ht") == 0) {
1266                 if (!acpi_force)
1267                         disable_acpi();
1268                 acpi_ht = 1;
1269         }
1270         /* "acpi=noirq" disables ACPI interrupt routing */
1271         else if (strcmp(arg, "noirq") == 0) {
1272                 acpi_noirq_set();
1273         } else {
1274                 /* Core will printk when we return error. */
1275                 return -EINVAL;
1276         }
1277         return 0;
1278 }
1279 early_param("acpi", parse_acpi);
1280
1281 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1282 static int __init parse_pci(char *arg)
1283 {
1284         if (arg && strcmp(arg, "noacpi") == 0)
1285                 acpi_disable_pci();
1286         return 0;
1287 }
1288 early_param("pci", parse_pci);
1289
1290 #ifdef CONFIG_X86_IO_APIC
1291 static int __init parse_acpi_skip_timer_override(char *arg)
1292 {
1293         acpi_skip_timer_override = 1;
1294         return 0;
1295 }
1296 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1297
1298 static int __init parse_acpi_use_timer_override(char *arg)
1299 {
1300         acpi_use_timer_override = 1;
1301         return 0;
1302 }
1303 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1304 #endif /* CONFIG_X86_IO_APIC */
1305
1306 static int __init setup_acpi_sci(char *s)
1307 {
1308         if (!s)
1309                 return -EINVAL;
1310         if (!strcmp(s, "edge"))
1311                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1312                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1313         else if (!strcmp(s, "level"))
1314                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1315                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1316         else if (!strcmp(s, "high"))
1317                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1318                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1319         else if (!strcmp(s, "low"))
1320                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1321                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1322         else
1323                 return -EINVAL;
1324         return 0;
1325 }
1326 early_param("acpi_sci", setup_acpi_sci);
1327
1328 int __acpi_acquire_global_lock(unsigned int *lock)
1329 {
1330         unsigned int old, new, val;
1331         do {
1332                 old = *lock;
1333                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1334                 val = cmpxchg(lock, old, new);
1335         } while (unlikely (val != old));
1336         return (new < 3) ? -1 : 0;
1337 }
1338
1339 int __acpi_release_global_lock(unsigned int *lock)
1340 {
1341         unsigned int old, new, val;
1342         do {
1343                 old = *lock;
1344                 new = old & ~0x3;
1345                 val = cmpxchg(lock, old, new);
1346         } while (unlikely (val != old));
1347         return old & 0x1;
1348 }