Merge branch 'linus' into x86/irq
[linux-2.6.git] / arch / x86 / 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/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 #include <asm/smp.h>
43
44 #ifdef CONFIG_X86_LOCAL_APIC
45 # include <mach_apic.h>
46 #endif
47
48 static int __initdata acpi_force = 0;
49
50 #ifdef  CONFIG_ACPI
51 int acpi_disabled = 0;
52 #else
53 int acpi_disabled = 1;
54 #endif
55 EXPORT_SYMBOL(acpi_disabled);
56
57 #ifdef  CONFIG_X86_64
58
59 #include <asm/proto.h>
60 #include <asm/genapic.h>
61
62 #else                           /* X86 */
63
64 #ifdef  CONFIG_X86_LOCAL_APIC
65 #include <mach_apic.h>
66 #include <mach_mpparse.h>
67 #endif                          /* CONFIG_X86_LOCAL_APIC */
68
69 #endif                          /* X86 */
70
71 #define BAD_MADT_ENTRY(entry, end) (                                        \
72                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
73                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
74
75 #define PREFIX                  "ACPI: "
76
77 int acpi_noirq;                         /* skip ACPI IRQ initialization */
78 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
79 EXPORT_SYMBOL(acpi_pci_disabled);
80 int acpi_ht __initdata = 1;     /* enable HT */
81
82 int acpi_lapic;
83 int acpi_ioapic;
84 int acpi_strict;
85
86 u8 acpi_sci_flags __initdata;
87 int acpi_sci_override_gsi __initdata;
88 int acpi_skip_timer_override __initdata;
89 int acpi_use_timer_override __initdata;
90
91 #ifdef CONFIG_X86_LOCAL_APIC
92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
93 #endif
94
95 #ifndef __HAVE_ARCH_CMPXCHG
96 #warning ACPI uses CMPXCHG, i486 and later hardware
97 #endif
98
99 /* --------------------------------------------------------------------------
100                               Boot-time Configuration
101    -------------------------------------------------------------------------- */
102
103 /*
104  * The default interrupt routing model is PIC (8259).  This gets
105  * overridden if IOAPICs are enumerated (below).
106  */
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108
109 #ifdef  CONFIG_X86_64
110
111 /* rely on all ACPI tables being in the direct mapping */
112 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
113 {
114         if (!phys_addr || !size)
115                 return NULL;
116
117         if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE)
118                 return __va(phys_addr);
119
120         return NULL;
121 }
122
123 #else
124
125 /*
126  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
127  * to map the target physical address. The problem is that set_fixmap()
128  * provides a single page, and it is possible that the page is not
129  * sufficient.
130  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
131  * i.e. until the next __va_range() call.
132  *
133  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
134  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
135  * count idx down while incrementing the phys address.
136  */
137 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
138 {
139         unsigned long base, offset, mapped_size;
140         int idx;
141
142         if (phys + size < 8 * 1024 * 1024)
143                 return __va(phys);
144
145         offset = phys & (PAGE_SIZE - 1);
146         mapped_size = PAGE_SIZE - offset;
147         set_fixmap(FIX_ACPI_END, phys);
148         base = fix_to_virt(FIX_ACPI_END);
149
150         /*
151          * Most cases can be covered by the below.
152          */
153         idx = FIX_ACPI_END;
154         while (mapped_size < size) {
155                 if (--idx < FIX_ACPI_BEGIN)
156                         return NULL;    /* cannot handle this */
157                 phys += PAGE_SIZE;
158                 set_fixmap(idx, phys);
159                 mapped_size += PAGE_SIZE;
160         }
161
162         return ((unsigned char *)base + offset);
163 }
164 #endif
165
166 #ifdef CONFIG_PCI_MMCONFIG
167 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
168 struct acpi_mcfg_allocation *pci_mmcfg_config;
169 int pci_mmcfg_config_num;
170
171 int __init acpi_parse_mcfg(struct acpi_table_header *header)
172 {
173         struct acpi_table_mcfg *mcfg;
174         unsigned long i;
175         int config_size;
176
177         if (!header)
178                 return -EINVAL;
179
180         mcfg = (struct acpi_table_mcfg *)header;
181
182         /* how many config structures do we have */
183         pci_mmcfg_config_num = 0;
184         i = header->length - sizeof(struct acpi_table_mcfg);
185         while (i >= sizeof(struct acpi_mcfg_allocation)) {
186                 ++pci_mmcfg_config_num;
187                 i -= sizeof(struct acpi_mcfg_allocation);
188         };
189         if (pci_mmcfg_config_num == 0) {
190                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
191                 return -ENODEV;
192         }
193
194         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
195         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
196         if (!pci_mmcfg_config) {
197                 printk(KERN_WARNING PREFIX
198                        "No memory for MCFG config tables\n");
199                 return -ENOMEM;
200         }
201
202         memcpy(pci_mmcfg_config, &mcfg[1], config_size);
203         for (i = 0; i < pci_mmcfg_config_num; ++i) {
204                 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
205                         printk(KERN_ERR PREFIX
206                                "MMCONFIG not in low 4GB of memory\n");
207                         kfree(pci_mmcfg_config);
208                         pci_mmcfg_config_num = 0;
209                         return -ENODEV;
210                 }
211         }
212
213         return 0;
214 }
215 #endif                          /* CONFIG_PCI_MMCONFIG */
216
217 #ifdef CONFIG_X86_LOCAL_APIC
218 static int __init acpi_parse_madt(struct acpi_table_header *table)
219 {
220         struct acpi_table_madt *madt = NULL;
221
222         if (!cpu_has_apic)
223                 return -EINVAL;
224
225         madt = (struct acpi_table_madt *)table;
226         if (!madt) {
227                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
228                 return -ENODEV;
229         }
230
231         if (madt->address) {
232                 acpi_lapic_addr = (u64) madt->address;
233
234                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
235                        madt->address);
236         }
237
238         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
239
240         return 0;
241 }
242
243 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
244 {
245         unsigned int ver = 0;
246
247         if (!enabled) {
248                 ++disabled_cpus;
249                 return;
250         }
251
252 #ifdef CONFIG_X86_32
253         if (boot_cpu_physical_apicid != -1U)
254                 ver = apic_version[boot_cpu_physical_apicid];
255 #endif
256
257         generic_processor_info(id, ver);
258 }
259
260 static int __init
261 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
262 {
263         struct acpi_madt_local_apic *processor = NULL;
264
265         processor = (struct acpi_madt_local_apic *)header;
266
267         if (BAD_MADT_ENTRY(processor, end))
268                 return -EINVAL;
269
270         acpi_table_print_madt_entry(header);
271
272         /*
273          * We need to register disabled CPU as well to permit
274          * counting disabled CPUs. This allows us to size
275          * cpus_possible_map more accurately, to permit
276          * to not preallocating memory for all NR_CPUS
277          * when we use CPU hotplug.
278          */
279         acpi_register_lapic(processor->id,      /* APIC ID */
280                             processor->lapic_flags & ACPI_MADT_ENABLED);
281
282         return 0;
283 }
284
285 static int __init
286 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
287 {
288         struct acpi_madt_local_sapic *processor = NULL;
289
290         processor = (struct acpi_madt_local_sapic *)header;
291
292         if (BAD_MADT_ENTRY(processor, end))
293                 return -EINVAL;
294
295         acpi_table_print_madt_entry(header);
296
297         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
298                             processor->lapic_flags & ACPI_MADT_ENABLED);
299
300         return 0;
301 }
302
303 static int __init
304 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
305                           const unsigned long end)
306 {
307         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
308
309         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
310
311         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
312                 return -EINVAL;
313
314         acpi_lapic_addr = lapic_addr_ovr->address;
315
316         return 0;
317 }
318
319 static int __init
320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
321 {
322         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
323
324         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
325
326         if (BAD_MADT_ENTRY(lapic_nmi, end))
327                 return -EINVAL;
328
329         acpi_table_print_madt_entry(header);
330
331         if (lapic_nmi->lint != 1)
332                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
333
334         return 0;
335 }
336
337 #endif                          /*CONFIG_X86_LOCAL_APIC */
338
339 #ifdef CONFIG_X86_IO_APIC
340
341 struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
342
343 static int __init
344 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
345 {
346         struct acpi_madt_io_apic *ioapic = NULL;
347
348         ioapic = (struct acpi_madt_io_apic *)header;
349
350         if (BAD_MADT_ENTRY(ioapic, end))
351                 return -EINVAL;
352
353         acpi_table_print_madt_entry(header);
354
355         mp_register_ioapic(ioapic->id,
356                            ioapic->address, ioapic->global_irq_base);
357
358         return 0;
359 }
360
361 /*
362  * Parse Interrupt Source Override for the ACPI SCI
363  */
364 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
365 {
366         if (trigger == 0)       /* compatible SCI trigger is level */
367                 trigger = 3;
368
369         if (polarity == 0)      /* compatible SCI polarity is low */
370                 polarity = 3;
371
372         /* Command-line over-ride via acpi_sci= */
373         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
374                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
375
376         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
377                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
378
379         /*
380          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
381          * If GSI is < 16, this will update its flags,
382          * else it will create a new mp_irqs[] entry.
383          */
384         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
385
386         /*
387          * stash over-ride to indicate we've been here
388          * and for later update of acpi_gbl_FADT
389          */
390         acpi_sci_override_gsi = gsi;
391         return;
392 }
393
394 static int __init
395 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
396                        const unsigned long end)
397 {
398         struct acpi_madt_interrupt_override *intsrc = NULL;
399
400         intsrc = (struct acpi_madt_interrupt_override *)header;
401
402         if (BAD_MADT_ENTRY(intsrc, end))
403                 return -EINVAL;
404
405         acpi_table_print_madt_entry(header);
406
407         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
408                 acpi_sci_ioapic_setup(intsrc->global_irq,
409                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
410                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
411                 return 0;
412         }
413
414         if (acpi_skip_timer_override &&
415             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
416                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
417                 return 0;
418         }
419
420         mp_override_legacy_irq(intsrc->source_irq,
421                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
422                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
423                                 intsrc->global_irq);
424
425         return 0;
426 }
427
428 static int __init
429 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
430 {
431         struct acpi_madt_nmi_source *nmi_src = NULL;
432
433         nmi_src = (struct acpi_madt_nmi_source *)header;
434
435         if (BAD_MADT_ENTRY(nmi_src, end))
436                 return -EINVAL;
437
438         acpi_table_print_madt_entry(header);
439
440         /* TBD: Support nimsrc entries? */
441
442         return 0;
443 }
444
445 #endif                          /* CONFIG_X86_IO_APIC */
446
447 /*
448  * acpi_pic_sci_set_trigger()
449  *
450  * use ELCR to set PIC-mode trigger type for SCI
451  *
452  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
453  * it may require Edge Trigger -- use "acpi_sci=edge"
454  *
455  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
456  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
457  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
458  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
459  */
460
461 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
462 {
463         unsigned int mask = 1 << irq;
464         unsigned int old, new;
465
466         /* Real old ELCR mask */
467         old = inb(0x4d0) | (inb(0x4d1) << 8);
468
469         /*
470          * If we use ACPI to set PCI IRQs, then we should clear ELCR
471          * since we will set it correctly as we enable the PCI irq
472          * routing.
473          */
474         new = acpi_noirq ? old : 0;
475
476         /*
477          * Update SCI information in the ELCR, it isn't in the PCI
478          * routing tables..
479          */
480         switch (trigger) {
481         case 1:         /* Edge - clear */
482                 new &= ~mask;
483                 break;
484         case 3:         /* Level - set */
485                 new |= mask;
486                 break;
487         }
488
489         if (old == new)
490                 return;
491
492         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
493         outb(new, 0x4d0);
494         outb(new >> 8, 0x4d1);
495 }
496
497 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
498 {
499         *irq = gsi;
500         return 0;
501 }
502
503 /*
504  * success: return IRQ number (>=0)
505  * failure: return < 0
506  */
507 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
508 {
509         unsigned int irq;
510         unsigned int plat_gsi = gsi;
511
512 #ifdef CONFIG_PCI
513         /*
514          * Make sure all (legacy) PCI IRQs are set as level-triggered.
515          */
516         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
517                 if (triggering == ACPI_LEVEL_SENSITIVE)
518                         eisa_set_level_irq(gsi);
519         }
520 #endif
521
522 #ifdef CONFIG_X86_IO_APIC
523         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
524                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
525         }
526 #endif
527         acpi_gsi_to_irq(plat_gsi, &irq);
528         return irq;
529 }
530
531 /*
532  *  ACPI based hotplug support for CPU
533  */
534 #ifdef CONFIG_ACPI_HOTPLUG_CPU
535
536 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
537 {
538         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
539         union acpi_object *obj;
540         struct acpi_madt_local_apic *lapic;
541         cpumask_t tmp_map, new_map;
542         u8 physid;
543         int cpu;
544
545         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
546                 return -EINVAL;
547
548         if (!buffer.length || !buffer.pointer)
549                 return -EINVAL;
550
551         obj = buffer.pointer;
552         if (obj->type != ACPI_TYPE_BUFFER ||
553             obj->buffer.length < sizeof(*lapic)) {
554                 kfree(buffer.pointer);
555                 return -EINVAL;
556         }
557
558         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
559
560         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
561             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
562                 kfree(buffer.pointer);
563                 return -EINVAL;
564         }
565
566         physid = lapic->id;
567
568         kfree(buffer.pointer);
569         buffer.length = ACPI_ALLOCATE_BUFFER;
570         buffer.pointer = NULL;
571
572         tmp_map = cpu_present_map;
573         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
574
575         /*
576          * If mp_register_lapic successfully generates a new logical cpu
577          * number, then the following will get us exactly what was mapped
578          */
579         cpus_andnot(new_map, cpu_present_map, tmp_map);
580         if (cpus_empty(new_map)) {
581                 printk ("Unable to map lapic to logical cpu number\n");
582                 return -EINVAL;
583         }
584
585         cpu = first_cpu(new_map);
586
587         *pcpu = cpu;
588         return 0;
589 }
590
591 /* wrapper to silence section mismatch warning */
592 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
593 {
594         return _acpi_map_lsapic(handle, pcpu);
595 }
596 EXPORT_SYMBOL(acpi_map_lsapic);
597
598 int acpi_unmap_lsapic(int cpu)
599 {
600         per_cpu(x86_cpu_to_apicid, cpu) = -1;
601         cpu_clear(cpu, cpu_present_map);
602         num_processors--;
603
604         return (0);
605 }
606
607 EXPORT_SYMBOL(acpi_unmap_lsapic);
608 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
609
610 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
611 {
612         /* TBD */
613         return -EINVAL;
614 }
615
616 EXPORT_SYMBOL(acpi_register_ioapic);
617
618 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
619 {
620         /* TBD */
621         return -EINVAL;
622 }
623
624 EXPORT_SYMBOL(acpi_unregister_ioapic);
625
626 static int __init acpi_parse_sbf(struct acpi_table_header *table)
627 {
628         struct acpi_table_boot *sb;
629
630         sb = (struct acpi_table_boot *)table;
631         if (!sb) {
632                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
633                 return -ENODEV;
634         }
635
636         sbf_port = sb->cmos_index;      /* Save CMOS port */
637
638         return 0;
639 }
640
641 #ifdef CONFIG_HPET_TIMER
642 #include <asm/hpet.h>
643
644 static struct __initdata resource *hpet_res;
645
646 static int __init acpi_parse_hpet(struct acpi_table_header *table)
647 {
648         struct acpi_table_hpet *hpet_tbl;
649
650         hpet_tbl = (struct acpi_table_hpet *)table;
651         if (!hpet_tbl) {
652                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
653                 return -ENODEV;
654         }
655
656         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
657                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
658                        "memory.\n");
659                 return -1;
660         }
661
662         hpet_address = hpet_tbl->address.address;
663
664         /*
665          * Some broken BIOSes advertise HPET at 0x0. We really do not
666          * want to allocate a resource there.
667          */
668         if (!hpet_address) {
669                 printk(KERN_WARNING PREFIX
670                        "HPET id: %#x base: %#lx is invalid\n",
671                        hpet_tbl->id, hpet_address);
672                 return 0;
673         }
674 #ifdef CONFIG_X86_64
675         /*
676          * Some even more broken BIOSes advertise HPET at
677          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
678          * some noise:
679          */
680         if (hpet_address == 0xfed0000000000000UL) {
681                 if (!hpet_force_user) {
682                         printk(KERN_WARNING PREFIX "HPET id: %#x "
683                                "base: 0xfed0000000000000 is bogus\n "
684                                "try hpet=force on the kernel command line to "
685                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
686                         hpet_address = 0;
687                         return 0;
688                 }
689                 printk(KERN_WARNING PREFIX
690                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
691                        "to 0xfed00000.\n", hpet_tbl->id);
692                 hpet_address >>= 32;
693         }
694 #endif
695         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
696                hpet_tbl->id, hpet_address);
697
698         /*
699          * Allocate and initialize the HPET firmware resource for adding into
700          * the resource tree during the lateinit timeframe.
701          */
702 #define HPET_RESOURCE_NAME_SIZE 9
703         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
704
705         hpet_res->name = (void *)&hpet_res[1];
706         hpet_res->flags = IORESOURCE_MEM;
707         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
708                  hpet_tbl->sequence);
709
710         hpet_res->start = hpet_address;
711         hpet_res->end = hpet_address + (1 * 1024) - 1;
712
713         return 0;
714 }
715
716 /*
717  * hpet_insert_resource inserts the HPET resources used into the resource
718  * tree.
719  */
720 static __init int hpet_insert_resource(void)
721 {
722         if (!hpet_res)
723                 return 1;
724
725         return insert_resource(&iomem_resource, hpet_res);
726 }
727
728 late_initcall(hpet_insert_resource);
729
730 #else
731 #define acpi_parse_hpet NULL
732 #endif
733
734 static int __init acpi_parse_fadt(struct acpi_table_header *table)
735 {
736
737 #ifdef CONFIG_X86_PM_TIMER
738         /* detect the location of the ACPI PM Timer */
739         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
740                 /* FADT rev. 2 */
741                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
742                     ACPI_ADR_SPACE_SYSTEM_IO)
743                         return 0;
744
745                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
746                 /*
747                  * "X" fields are optional extensions to the original V1.0
748                  * fields, so we must selectively expand V1.0 fields if the
749                  * corresponding X field is zero.
750                  */
751                 if (!pmtmr_ioport)
752                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
753         } else {
754                 /* FADT rev. 1 */
755                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
756         }
757         if (pmtmr_ioport)
758                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
759                        pmtmr_ioport);
760 #endif
761         return 0;
762 }
763
764 #ifdef  CONFIG_X86_LOCAL_APIC
765 /*
766  * Parse LAPIC entries in MADT
767  * returns 0 on success, < 0 on error
768  */
769
770 static void __init acpi_register_lapic_address(unsigned long address)
771 {
772         mp_lapic_addr = address;
773
774         set_fixmap_nocache(FIX_APIC_BASE, address);
775         if (boot_cpu_physical_apicid == -1U) {
776                 boot_cpu_physical_apicid  = GET_APIC_ID(read_apic_id());
777 #ifdef CONFIG_X86_32
778                 apic_version[boot_cpu_physical_apicid] =
779                          GET_APIC_VERSION(apic_read(APIC_LVR));
780 #endif
781         }
782 }
783
784 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
785 {
786         int count;
787
788         if (!cpu_has_apic)
789                 return -ENODEV;
790
791         /*
792          * Note that the LAPIC address is obtained from the MADT (32-bit value)
793          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
794          */
795
796         count =
797             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
798                                   acpi_parse_lapic_addr_ovr, 0);
799         if (count < 0) {
800                 printk(KERN_ERR PREFIX
801                        "Error parsing LAPIC address override entry\n");
802                 return count;
803         }
804
805         acpi_register_lapic_address(acpi_lapic_addr);
806
807         return count;
808 }
809
810 static int __init acpi_parse_madt_lapic_entries(void)
811 {
812         int count;
813
814         if (!cpu_has_apic)
815                 return -ENODEV;
816
817         /*
818          * Note that the LAPIC address is obtained from the MADT (32-bit value)
819          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
820          */
821
822         count =
823             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
824                                   acpi_parse_lapic_addr_ovr, 0);
825         if (count < 0) {
826                 printk(KERN_ERR PREFIX
827                        "Error parsing LAPIC address override entry\n");
828                 return count;
829         }
830
831         acpi_register_lapic_address(acpi_lapic_addr);
832
833         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
834                                       acpi_parse_sapic, MAX_APICS);
835
836         if (!count)
837                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
838                                               acpi_parse_lapic, MAX_APICS);
839         if (!count) {
840                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
841                 /* TBD: Cleanup to allow fallback to MPS */
842                 return -ENODEV;
843         } else if (count < 0) {
844                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
845                 /* TBD: Cleanup to allow fallback to MPS */
846                 return count;
847         }
848
849         count =
850             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
851         if (count < 0) {
852                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
853                 /* TBD: Cleanup to allow fallback to MPS */
854                 return count;
855         }
856         return 0;
857 }
858 #endif                          /* CONFIG_X86_LOCAL_APIC */
859
860 #ifdef  CONFIG_X86_IO_APIC
861 /*
862  * Parse IOAPIC related entries in MADT
863  * returns 0 on success, < 0 on error
864  */
865 static int __init acpi_parse_madt_ioapic_entries(void)
866 {
867         int count;
868
869         /*
870          * ACPI interpreter is required to complete interrupt setup,
871          * so if it is off, don't enumerate the io-apics with ACPI.
872          * If MPS is present, it will handle them,
873          * otherwise the system will stay in PIC mode
874          */
875         if (acpi_disabled || acpi_noirq) {
876                 return -ENODEV;
877         }
878
879         if (!cpu_has_apic)
880                 return -ENODEV;
881
882         /*
883          * if "noapic" boot option, don't look for IO-APICs
884          */
885         if (skip_ioapic_setup) {
886                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
887                        "due to 'noapic' option.\n");
888                 return -ENODEV;
889         }
890
891         count =
892             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
893                                   MAX_IO_APICS);
894         if (!count) {
895                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
896                 return -ENODEV;
897         } else if (count < 0) {
898                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
899                 return count;
900         }
901
902         count =
903             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
904                                   NR_IRQ_VECTORS);
905         if (count < 0) {
906                 printk(KERN_ERR PREFIX
907                        "Error parsing interrupt source overrides entry\n");
908                 /* TBD: Cleanup to allow fallback to MPS */
909                 return count;
910         }
911
912         /*
913          * If BIOS did not supply an INT_SRC_OVR for the SCI
914          * pretend we got one so we can set the SCI flags.
915          */
916         if (!acpi_sci_override_gsi)
917                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
918
919         /* Fill in identity legacy mapings where no override */
920         mp_config_acpi_legacy_irqs();
921
922         count =
923             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
924                                   NR_IRQ_VECTORS);
925         if (count < 0) {
926                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
927                 /* TBD: Cleanup to allow fallback to MPS */
928                 return count;
929         }
930
931         return 0;
932 }
933 #else
934 static inline int acpi_parse_madt_ioapic_entries(void)
935 {
936         return -1;
937 }
938 #endif  /* !CONFIG_X86_IO_APIC */
939
940 static void __init early_acpi_process_madt(void)
941 {
942 #ifdef CONFIG_X86_LOCAL_APIC
943         int error;
944
945         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
946
947                 /*
948                  * Parse MADT LAPIC entries
949                  */
950                 error = early_acpi_parse_madt_lapic_addr_ovr();
951                 if (!error) {
952                         acpi_lapic = 1;
953                         smp_found_config = 1;
954                 }
955                 if (error == -EINVAL) {
956                         /*
957                          * Dell Precision Workstation 410, 610 come here.
958                          */
959                         printk(KERN_ERR PREFIX
960                                "Invalid BIOS MADT, disabling ACPI\n");
961                         disable_acpi();
962                 }
963         }
964 #endif
965 }
966
967 static void __init acpi_process_madt(void)
968 {
969 #ifdef CONFIG_X86_LOCAL_APIC
970         int error;
971
972         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
973
974                 /*
975                  * Parse MADT LAPIC entries
976                  */
977                 error = acpi_parse_madt_lapic_entries();
978                 if (!error) {
979                         acpi_lapic = 1;
980
981 #ifdef CONFIG_X86_GENERICARCH
982                         generic_bigsmp_probe();
983 #endif
984                         /*
985                          * Parse MADT IO-APIC entries
986                          */
987                         error = acpi_parse_madt_ioapic_entries();
988                         if (!error) {
989                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
990                                 acpi_irq_balance_set(NULL);
991                                 acpi_ioapic = 1;
992
993                                 smp_found_config = 1;
994                                 setup_apic_routing();
995                         }
996                 }
997                 if (error == -EINVAL) {
998                         /*
999                          * Dell Precision Workstation 410, 610 come here.
1000                          */
1001                         printk(KERN_ERR PREFIX
1002                                "Invalid BIOS MADT, disabling ACPI\n");
1003                         disable_acpi();
1004                 }
1005         }
1006 #endif
1007         return;
1008 }
1009
1010 #ifdef __i386__
1011
1012 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1013 {
1014         if (!acpi_force) {
1015                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1016                        d->ident);
1017                 acpi_noirq_set();
1018         }
1019         return 0;
1020 }
1021
1022 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1023 {
1024         if (!acpi_force) {
1025                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1026                        d->ident);
1027                 acpi_disable_pci();
1028         }
1029         return 0;
1030 }
1031
1032 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1033 {
1034         if (!acpi_force) {
1035                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1036                 disable_acpi();
1037         } else {
1038                 printk(KERN_NOTICE
1039                        "Warning: DMI blacklist says broken, but acpi forced\n");
1040         }
1041         return 0;
1042 }
1043
1044 /*
1045  * Limit ACPI to CPU enumeration for HT
1046  */
1047 static int __init force_acpi_ht(const struct dmi_system_id *d)
1048 {
1049         if (!acpi_force) {
1050                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1051                        d->ident);
1052                 disable_acpi();
1053                 acpi_ht = 1;
1054         } else {
1055                 printk(KERN_NOTICE
1056                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1057         }
1058         return 0;
1059 }
1060
1061 /*
1062  * If your system is blacklisted here, but you find that acpi=force
1063  * works for you, please contact acpi-devel@sourceforge.net
1064  */
1065 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1066         /*
1067          * Boxes that need ACPI disabled
1068          */
1069         {
1070          .callback = dmi_disable_acpi,
1071          .ident = "IBM Thinkpad",
1072          .matches = {
1073                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1074                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1075                      },
1076          },
1077
1078         /*
1079          * Boxes that need acpi=ht
1080          */
1081         {
1082          .callback = force_acpi_ht,
1083          .ident = "FSC Primergy T850",
1084          .matches = {
1085                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1086                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1087                      },
1088          },
1089         {
1090          .callback = force_acpi_ht,
1091          .ident = "HP VISUALIZE NT Workstation",
1092          .matches = {
1093                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1094                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1095                      },
1096          },
1097         {
1098          .callback = force_acpi_ht,
1099          .ident = "Compaq Workstation W8000",
1100          .matches = {
1101                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1102                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1103                      },
1104          },
1105         {
1106          .callback = force_acpi_ht,
1107          .ident = "ASUS P4B266",
1108          .matches = {
1109                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1110                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1111                      },
1112          },
1113         {
1114          .callback = force_acpi_ht,
1115          .ident = "ASUS P2B-DS",
1116          .matches = {
1117                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1118                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1119                      },
1120          },
1121         {
1122          .callback = force_acpi_ht,
1123          .ident = "ASUS CUR-DLS",
1124          .matches = {
1125                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1126                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1127                      },
1128          },
1129         {
1130          .callback = force_acpi_ht,
1131          .ident = "ABIT i440BX-W83977",
1132          .matches = {
1133                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1134                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1135                      },
1136          },
1137         {
1138          .callback = force_acpi_ht,
1139          .ident = "IBM Bladecenter",
1140          .matches = {
1141                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1142                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1143                      },
1144          },
1145         {
1146          .callback = force_acpi_ht,
1147          .ident = "IBM eServer xSeries 360",
1148          .matches = {
1149                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1150                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1151                      },
1152          },
1153         {
1154          .callback = force_acpi_ht,
1155          .ident = "IBM eserver xSeries 330",
1156          .matches = {
1157                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1158                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1159                      },
1160          },
1161         {
1162          .callback = force_acpi_ht,
1163          .ident = "IBM eserver xSeries 440",
1164          .matches = {
1165                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1166                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1167                      },
1168          },
1169
1170         /*
1171          * Boxes that need ACPI PCI IRQ routing disabled
1172          */
1173         {
1174          .callback = disable_acpi_irq,
1175          .ident = "ASUS A7V",
1176          .matches = {
1177                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1178                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1179                      /* newer BIOS, Revision 1011, does work */
1180                      DMI_MATCH(DMI_BIOS_VERSION,
1181                                "ASUS A7V ACPI BIOS Revision 1007"),
1182                      },
1183          },
1184         {
1185                 /*
1186                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1187                  * for LPC bridge, which is needed for the PCI
1188                  * interrupt links to work. DSDT fix is in bug 5966.
1189                  * 2645, 2646 model numbers are shared with 600/600E/600X
1190                  */
1191          .callback = disable_acpi_irq,
1192          .ident = "IBM Thinkpad 600 Series 2645",
1193          .matches = {
1194                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1195                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1196                      },
1197          },
1198         {
1199          .callback = disable_acpi_irq,
1200          .ident = "IBM Thinkpad 600 Series 2646",
1201          .matches = {
1202                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1203                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1204                      },
1205          },
1206         /*
1207          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1208          */
1209         {                       /* _BBN 0 bug */
1210          .callback = disable_acpi_pci,
1211          .ident = "ASUS PR-DLS",
1212          .matches = {
1213                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1214                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1215                      DMI_MATCH(DMI_BIOS_VERSION,
1216                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1217                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1218                      },
1219          },
1220         {
1221          .callback = disable_acpi_pci,
1222          .ident = "Acer TravelMate 36x Laptop",
1223          .matches = {
1224                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1225                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1226                      },
1227          },
1228         {}
1229 };
1230
1231 #endif                          /* __i386__ */
1232
1233 /*
1234  * acpi_boot_table_init() and acpi_boot_init()
1235  *  called from setup_arch(), always.
1236  *      1. checksums all tables
1237  *      2. enumerates lapics
1238  *      3. enumerates io-apics
1239  *
1240  * acpi_table_init() is separate to allow reading SRAT without
1241  * other side effects.
1242  *
1243  * side effects of acpi_boot_init:
1244  *      acpi_lapic = 1 if LAPIC found
1245  *      acpi_ioapic = 1 if IOAPIC found
1246  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1247  *      if acpi_blacklisted() acpi_disabled = 1;
1248  *      acpi_irq_model=...
1249  *      ...
1250  *
1251  * return value: (currently ignored)
1252  *      0: success
1253  *      !0: failure
1254  */
1255
1256 int __init acpi_boot_table_init(void)
1257 {
1258         int error;
1259
1260 #ifdef __i386__
1261         dmi_check_system(acpi_dmi_table);
1262 #endif
1263
1264         /*
1265          * If acpi_disabled, bail out
1266          * One exception: acpi=ht continues far enough to enumerate LAPICs
1267          */
1268         if (acpi_disabled && !acpi_ht)
1269                 return 1;
1270
1271         /*
1272          * Initialize the ACPI boot-time table parser.
1273          */
1274         error = acpi_table_init();
1275         if (error) {
1276                 disable_acpi();
1277                 return error;
1278         }
1279
1280         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1281
1282         /*
1283          * blacklist may disable ACPI entirely
1284          */
1285         error = acpi_blacklisted();
1286         if (error) {
1287                 if (acpi_force) {
1288                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1289                 } else {
1290                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1291                         disable_acpi();
1292                         return error;
1293                 }
1294         }
1295
1296         return 0;
1297 }
1298
1299 int __init early_acpi_boot_init(void)
1300 {
1301         /*
1302          * If acpi_disabled, bail out
1303          * One exception: acpi=ht continues far enough to enumerate LAPICs
1304          */
1305         if (acpi_disabled && !acpi_ht)
1306                 return 1;
1307
1308         /*
1309          * Process the Multiple APIC Description Table (MADT), if present
1310          */
1311         early_acpi_process_madt();
1312
1313         return 0;
1314 }
1315
1316 int __init acpi_boot_init(void)
1317 {
1318         /*
1319          * If acpi_disabled, bail out
1320          * One exception: acpi=ht continues far enough to enumerate LAPICs
1321          */
1322         if (acpi_disabled && !acpi_ht)
1323                 return 1;
1324
1325         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1326
1327         /*
1328          * set sci_int and PM timer address
1329          */
1330         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1331
1332         /*
1333          * Process the Multiple APIC Description Table (MADT), if present
1334          */
1335         acpi_process_madt();
1336
1337         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1338
1339         return 0;
1340 }
1341
1342 static int __init parse_acpi(char *arg)
1343 {
1344         if (!arg)
1345                 return -EINVAL;
1346
1347         /* "acpi=off" disables both ACPI table parsing and interpreter */
1348         if (strcmp(arg, "off") == 0) {
1349                 disable_acpi();
1350         }
1351         /* acpi=force to over-ride black-list */
1352         else if (strcmp(arg, "force") == 0) {
1353                 acpi_force = 1;
1354                 acpi_ht = 1;
1355                 acpi_disabled = 0;
1356         }
1357         /* acpi=strict disables out-of-spec workarounds */
1358         else if (strcmp(arg, "strict") == 0) {
1359                 acpi_strict = 1;
1360         }
1361         /* Limit ACPI just to boot-time to enable HT */
1362         else if (strcmp(arg, "ht") == 0) {
1363                 if (!acpi_force)
1364                         disable_acpi();
1365                 acpi_ht = 1;
1366         }
1367         /* "acpi=noirq" disables ACPI interrupt routing */
1368         else if (strcmp(arg, "noirq") == 0) {
1369                 acpi_noirq_set();
1370         } else {
1371                 /* Core will printk when we return error. */
1372                 return -EINVAL;
1373         }
1374         return 0;
1375 }
1376 early_param("acpi", parse_acpi);
1377
1378 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1379 static int __init parse_pci(char *arg)
1380 {
1381         if (arg && strcmp(arg, "noacpi") == 0)
1382                 acpi_disable_pci();
1383         return 0;
1384 }
1385 early_param("pci", parse_pci);
1386
1387 #ifdef CONFIG_X86_IO_APIC
1388 static int __init parse_acpi_skip_timer_override(char *arg)
1389 {
1390         acpi_skip_timer_override = 1;
1391         return 0;
1392 }
1393 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1394
1395 static int __init parse_acpi_use_timer_override(char *arg)
1396 {
1397         acpi_use_timer_override = 1;
1398         return 0;
1399 }
1400 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1401 #endif /* CONFIG_X86_IO_APIC */
1402
1403 static int __init setup_acpi_sci(char *s)
1404 {
1405         if (!s)
1406                 return -EINVAL;
1407         if (!strcmp(s, "edge"))
1408                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1409                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1410         else if (!strcmp(s, "level"))
1411                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1412                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1413         else if (!strcmp(s, "high"))
1414                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1415                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1416         else if (!strcmp(s, "low"))
1417                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1418                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1419         else
1420                 return -EINVAL;
1421         return 0;
1422 }
1423 early_param("acpi_sci", setup_acpi_sci);
1424
1425 int __acpi_acquire_global_lock(unsigned int *lock)
1426 {
1427         unsigned int old, new, val;
1428         do {
1429                 old = *lock;
1430                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1431                 val = cmpxchg(lock, old, new);
1432         } while (unlikely (val != old));
1433         return (new < 3) ? -1 : 0;
1434 }
1435
1436 int __acpi_release_global_lock(unsigned int *lock)
1437 {
1438         unsigned int old, new, val;
1439         do {
1440                 old = *lock;
1441                 new = old & ~0x3;
1442                 val = cmpxchg(lock, old, new);
1443         } while (unlikely (val != old));
1444         return old & 0x1;
1445 }