ACPICA: Allow ACPI id to be u32 instead of u8.
[linux-2.6.git] / arch / i386 / kernel / acpi / boot.c
1 /*
2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
3  *
4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24  */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/efi.h>
29 #include <linux/cpumask.h>
30 #include <linux/module.h>
31 #include <linux/dmi.h>
32 #include <linux/irq.h>
33 #include <linux/bootmem.h>
34 #include <linux/ioport.h>
35
36 #include <asm/pgtable.h>
37 #include <asm/io_apic.h>
38 #include <asm/apic.h>
39 #include <asm/io.h>
40 #include <asm/mpspec.h>
41
42 static int __initdata acpi_force = 0;
43
44 #ifdef  CONFIG_ACPI
45 int acpi_disabled = 0;
46 #else
47 int acpi_disabled = 1;
48 #endif
49 EXPORT_SYMBOL(acpi_disabled);
50
51 #ifdef  CONFIG_X86_64
52
53 #include <asm/proto.h>
54
55 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
56
57
58 #else                           /* X86 */
59
60 #ifdef  CONFIG_X86_LOCAL_APIC
61 #include <mach_apic.h>
62 #include <mach_mpparse.h>
63 #endif                          /* CONFIG_X86_LOCAL_APIC */
64
65 #endif                          /* X86 */
66
67 #define BAD_MADT_ENTRY(entry, end) (                                        \
68                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
69                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
70
71 #define PREFIX                  "ACPI: "
72
73 int acpi_noirq;                         /* skip ACPI IRQ initialization */
74 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
75 int acpi_ht __initdata = 1;     /* enable HT */
76
77 int acpi_lapic;
78 int acpi_ioapic;
79 int acpi_strict;
80 EXPORT_SYMBOL(acpi_strict);
81
82 u8 acpi_sci_flags __initdata;
83 int acpi_sci_override_gsi __initdata;
84 int acpi_skip_timer_override __initdata;
85 int acpi_use_timer_override __initdata;
86
87 #ifdef CONFIG_X86_LOCAL_APIC
88 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
89 #endif
90
91 #ifndef __HAVE_ARCH_CMPXCHG
92 #warning ACPI uses CMPXCHG, i486 and later hardware
93 #endif
94
95 /* --------------------------------------------------------------------------
96                               Boot-time Configuration
97    -------------------------------------------------------------------------- */
98
99 /*
100  * The default interrupt routing model is PIC (8259).  This gets
101  * overriden if IOAPICs are enumerated (below).
102  */
103 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
104
105 #ifdef  CONFIG_X86_64
106
107 /* rely on all ACPI tables being in the direct mapping */
108 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
109 {
110         if (!phys_addr || !size)
111                 return NULL;
112
113         if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
114                 return __va(phys_addr);
115
116         return NULL;
117 }
118
119 #else
120
121 /*
122  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
123  * to map the target physical address. The problem is that set_fixmap()
124  * provides a single page, and it is possible that the page is not
125  * sufficient.
126  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
127  * i.e. until the next __va_range() call.
128  *
129  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
130  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
131  * count idx down while incrementing the phys address.
132  */
133 char *__acpi_map_table(unsigned long phys, unsigned long size)
134 {
135         unsigned long base, offset, mapped_size;
136         int idx;
137
138         if (phys + size < 8 * 1024 * 1024)
139                 return __va(phys);
140
141         offset = phys & (PAGE_SIZE - 1);
142         mapped_size = PAGE_SIZE - offset;
143         set_fixmap(FIX_ACPI_END, phys);
144         base = fix_to_virt(FIX_ACPI_END);
145
146         /*
147          * Most cases can be covered by the below.
148          */
149         idx = FIX_ACPI_END;
150         while (mapped_size < size) {
151                 if (--idx < FIX_ACPI_BEGIN)
152                         return NULL;    /* cannot handle this */
153                 phys += PAGE_SIZE;
154                 set_fixmap(idx, phys);
155                 mapped_size += PAGE_SIZE;
156         }
157
158         return ((unsigned char *)base + offset);
159 }
160 #endif
161
162 #ifdef CONFIG_PCI_MMCONFIG
163 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
164 struct acpi_mcfg_allocation *pci_mmcfg_config;
165 int pci_mmcfg_config_num;
166
167 int __init acpi_parse_mcfg(struct acpi_table_header *header)
168 {
169         struct acpi_table_mcfg *mcfg;
170         unsigned long i;
171         int config_size;
172
173         if (!header)
174                 return -EINVAL;
175
176         mcfg = (struct acpi_table_mcfg *)header;
177
178         /* how many config structures do we have */
179         pci_mmcfg_config_num = 0;
180         i = header->length - sizeof(struct acpi_table_mcfg);
181         while (i >= sizeof(struct acpi_mcfg_allocation)) {
182                 ++pci_mmcfg_config_num;
183                 i -= sizeof(struct acpi_mcfg_allocation);
184         };
185         if (pci_mmcfg_config_num == 0) {
186                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
187                 return -ENODEV;
188         }
189
190         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
191         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
192         if (!pci_mmcfg_config) {
193                 printk(KERN_WARNING PREFIX
194                        "No memory for MCFG config tables\n");
195                 return -ENOMEM;
196         }
197
198         memcpy(pci_mmcfg_config, &mcfg[1], config_size);
199         for (i = 0; i < pci_mmcfg_config_num; ++i) {
200                 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
201                         printk(KERN_ERR PREFIX
202                                "MMCONFIG not in low 4GB of memory\n");
203                         kfree(pci_mmcfg_config);
204                         pci_mmcfg_config_num = 0;
205                         return -ENODEV;
206                 }
207         }
208
209         return 0;
210 }
211 #endif                          /* CONFIG_PCI_MMCONFIG */
212
213 #ifdef CONFIG_X86_LOCAL_APIC
214 static int __init acpi_parse_madt(struct acpi_table_header *table)
215 {
216         struct acpi_table_madt *madt = NULL;
217
218         if (!cpu_has_apic)
219                 return -EINVAL;
220
221         madt = (struct acpi_table_madt *)table;
222         if (!madt) {
223                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
224                 return -ENODEV;
225         }
226
227         if (madt->address) {
228                 acpi_lapic_addr = (u64) madt->address;
229
230                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
231                        madt->address);
232         }
233
234         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
235
236         return 0;
237 }
238
239 static int __init
240 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
241 {
242         struct acpi_madt_local_apic *processor = NULL;
243
244         processor = (struct acpi_madt_local_apic *)header;
245
246         if (BAD_MADT_ENTRY(processor, end))
247                 return -EINVAL;
248
249         acpi_table_print_madt_entry(header);
250
251         /*
252          * We need to register disabled CPU as well to permit
253          * counting disabled CPUs. This allows us to size
254          * cpus_possible_map more accurately, to permit
255          * to not preallocating memory for all NR_CPUS
256          * when we use CPU hotplug.
257          */
258         mp_register_lapic(processor->id,        /* APIC ID */
259                           processor->lapic_flags & ACPI_MADT_ENABLED);  /* Enabled? */
260
261         return 0;
262 }
263
264 static int __init
265 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
266                           const unsigned long end)
267 {
268         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
269
270         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
271
272         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
273                 return -EINVAL;
274
275         acpi_lapic_addr = lapic_addr_ovr->address;
276
277         return 0;
278 }
279
280 static int __init
281 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
282 {
283         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
284
285         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
286
287         if (BAD_MADT_ENTRY(lapic_nmi, end))
288                 return -EINVAL;
289
290         acpi_table_print_madt_entry(header);
291
292         if (lapic_nmi->lint != 1)
293                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
294
295         return 0;
296 }
297
298 #endif                          /*CONFIG_X86_LOCAL_APIC */
299
300 #ifdef CONFIG_X86_IO_APIC
301
302 static int __init
303 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
304 {
305         struct acpi_madt_io_apic *ioapic = NULL;
306
307         ioapic = (struct acpi_madt_io_apic *)header;
308
309         if (BAD_MADT_ENTRY(ioapic, end))
310                 return -EINVAL;
311
312         acpi_table_print_madt_entry(header);
313
314         mp_register_ioapic(ioapic->id,
315                            ioapic->address, ioapic->global_irq_base);
316
317         return 0;
318 }
319
320 /*
321  * Parse Interrupt Source Override for the ACPI SCI
322  */
323 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
324 {
325         if (trigger == 0)       /* compatible SCI trigger is level */
326                 trigger = 3;
327
328         if (polarity == 0)      /* compatible SCI polarity is low */
329                 polarity = 3;
330
331         /* Command-line over-ride via acpi_sci= */
332         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
333                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
334
335         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
336                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
337
338         /*
339          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
340          * If GSI is < 16, this will update its flags,
341          * else it will create a new mp_irqs[] entry.
342          */
343         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
344
345         /*
346          * stash over-ride to indicate we've been here
347          * and for later update of acpi_gbl_FADT
348          */
349         acpi_sci_override_gsi = gsi;
350         return;
351 }
352
353 static int __init
354 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
355                        const unsigned long end)
356 {
357         struct acpi_madt_interrupt_override *intsrc = NULL;
358
359         intsrc = (struct acpi_madt_interrupt_override *)header;
360
361         if (BAD_MADT_ENTRY(intsrc, end))
362                 return -EINVAL;
363
364         acpi_table_print_madt_entry(header);
365
366         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
367                 acpi_sci_ioapic_setup(intsrc->global_irq,
368                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
369                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
370                 return 0;
371         }
372
373         if (acpi_skip_timer_override &&
374             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
375                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
376                 return 0;
377         }
378
379         mp_override_legacy_irq(intsrc->source_irq,
380                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
381                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
382                                 intsrc->global_irq);
383
384         return 0;
385 }
386
387 static int __init
388 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
389 {
390         struct acpi_madt_nmi_source *nmi_src = NULL;
391
392         nmi_src = (struct acpi_madt_nmi_source *)header;
393
394         if (BAD_MADT_ENTRY(nmi_src, end))
395                 return -EINVAL;
396
397         acpi_table_print_madt_entry(header);
398
399         /* TBD: Support nimsrc entries? */
400
401         return 0;
402 }
403
404 #endif                          /* CONFIG_X86_IO_APIC */
405
406 /*
407  * acpi_pic_sci_set_trigger()
408  *
409  * use ELCR to set PIC-mode trigger type for SCI
410  *
411  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
412  * it may require Edge Trigger -- use "acpi_sci=edge"
413  *
414  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
415  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
416  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
417  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
418  */
419
420 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
421 {
422         unsigned int mask = 1 << irq;
423         unsigned int old, new;
424
425         /* Real old ELCR mask */
426         old = inb(0x4d0) | (inb(0x4d1) << 8);
427
428         /*
429          * If we use ACPI to set PCI irq's, then we should clear ELCR
430          * since we will set it correctly as we enable the PCI irq
431          * routing.
432          */
433         new = acpi_noirq ? old : 0;
434
435         /*
436          * Update SCI information in the ELCR, it isn't in the PCI
437          * routing tables..
438          */
439         switch (trigger) {
440         case 1:         /* Edge - clear */
441                 new &= ~mask;
442                 break;
443         case 3:         /* Level - set */
444                 new |= mask;
445                 break;
446         }
447
448         if (old == new)
449                 return;
450
451         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
452         outb(new, 0x4d0);
453         outb(new >> 8, 0x4d1);
454 }
455
456 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
457 {
458         *irq = gsi;
459         return 0;
460 }
461
462 /*
463  * success: return IRQ number (>=0)
464  * failure: return < 0
465  */
466 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
467 {
468         unsigned int irq;
469         unsigned int plat_gsi = gsi;
470
471 #ifdef CONFIG_PCI
472         /*
473          * Make sure all (legacy) PCI IRQs are set as level-triggered.
474          */
475         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
476                 extern void eisa_set_level_irq(unsigned int irq);
477
478                 if (triggering == ACPI_LEVEL_SENSITIVE)
479                         eisa_set_level_irq(gsi);
480         }
481 #endif
482
483 #ifdef CONFIG_X86_IO_APIC
484         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
485                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
486         }
487 #endif
488         acpi_gsi_to_irq(plat_gsi, &irq);
489         return irq;
490 }
491
492 EXPORT_SYMBOL(acpi_register_gsi);
493
494 /*
495  *  ACPI based hotplug support for CPU
496  */
497 #ifdef CONFIG_ACPI_HOTPLUG_CPU
498 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
499 {
500         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
501         union acpi_object *obj;
502         struct acpi_madt_local_apic *lapic;
503         cpumask_t tmp_map, new_map;
504         u8 physid;
505         int cpu;
506
507         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
508                 return -EINVAL;
509
510         if (!buffer.length || !buffer.pointer)
511                 return -EINVAL;
512
513         obj = buffer.pointer;
514         if (obj->type != ACPI_TYPE_BUFFER ||
515             obj->buffer.length < sizeof(*lapic)) {
516                 kfree(buffer.pointer);
517                 return -EINVAL;
518         }
519
520         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
521
522         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
523             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
524                 kfree(buffer.pointer);
525                 return -EINVAL;
526         }
527
528         physid = lapic->id;
529
530         kfree(buffer.pointer);
531         buffer.length = ACPI_ALLOCATE_BUFFER;
532         buffer.pointer = NULL;
533
534         tmp_map = cpu_present_map;
535         mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
536
537         /*
538          * If mp_register_lapic successfully generates a new logical cpu
539          * number, then the following will get us exactly what was mapped
540          */
541         cpus_andnot(new_map, cpu_present_map, tmp_map);
542         if (cpus_empty(new_map)) {
543                 printk ("Unable to map lapic to logical cpu number\n");
544                 return -EINVAL;
545         }
546
547         cpu = first_cpu(new_map);
548
549         *pcpu = cpu;
550         return 0;
551 }
552
553 EXPORT_SYMBOL(acpi_map_lsapic);
554
555 int acpi_unmap_lsapic(int cpu)
556 {
557         x86_cpu_to_apicid[cpu] = -1;
558         cpu_clear(cpu, cpu_present_map);
559         num_processors--;
560
561         return (0);
562 }
563
564 EXPORT_SYMBOL(acpi_unmap_lsapic);
565 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
566
567 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
568 {
569         /* TBD */
570         return -EINVAL;
571 }
572
573 EXPORT_SYMBOL(acpi_register_ioapic);
574
575 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
576 {
577         /* TBD */
578         return -EINVAL;
579 }
580
581 EXPORT_SYMBOL(acpi_unregister_ioapic);
582
583 static unsigned long __init
584 acpi_scan_rsdp(unsigned long start, unsigned long length)
585 {
586         unsigned long offset = 0;
587         unsigned long sig_len = sizeof("RSD PTR ") - 1;
588
589         /*
590          * Scan all 16-byte boundaries of the physical memory region for the
591          * RSDP signature.
592          */
593         for (offset = 0; offset < length; offset += 16) {
594                 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
595                         continue;
596                 return (start + offset);
597         }
598
599         return 0;
600 }
601
602 static int __init acpi_parse_sbf(struct acpi_table_header *table)
603 {
604         struct acpi_table_boot *sb;
605
606         sb = (struct acpi_table_boot *)table;
607         if (!sb) {
608                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
609                 return -ENODEV;
610         }
611
612         sbf_port = sb->cmos_index;      /* Save CMOS port */
613
614         return 0;
615 }
616
617 #ifdef CONFIG_HPET_TIMER
618
619 static int __init acpi_parse_hpet(struct acpi_table_header *table)
620 {
621         struct acpi_table_hpet *hpet_tbl;
622         struct resource *hpet_res;
623         resource_size_t res_start;
624
625         hpet_tbl = (struct acpi_table_hpet *)table;
626         if (!hpet_tbl) {
627                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
628                 return -ENODEV;
629         }
630
631         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
632                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
633                        "memory.\n");
634                 return -1;
635         }
636
637 #define HPET_RESOURCE_NAME_SIZE 9
638         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
639         if (hpet_res) {
640                 memset(hpet_res, 0, sizeof(*hpet_res));
641                 hpet_res->name = (void *)&hpet_res[1];
642                 hpet_res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
643                 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE,
644                          "HPET %u", hpet_tbl->sequence);
645                 hpet_res->end = (1 * 1024) - 1;
646         }
647
648 #ifdef CONFIG_X86_64
649         vxtime.hpet_address = hpet_tbl->address.address;
650
651         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
652                 hpet_tbl->id, vxtime.hpet_address);
653
654         res_start = vxtime.hpet_address;
655 #else                          /* X86 */
656         {
657                 extern unsigned long hpet_address;
658
659                 hpet_address = hpet_tbl->address.address;
660                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
661                         hpet_tbl->id, hpet_address);
662
663                 res_start = hpet_address;
664         }
665 #endif                         /* X86 */
666
667         if (hpet_res) {
668                 hpet_res->start = res_start;
669                 hpet_res->end += res_start;
670                 insert_resource(&iomem_resource, hpet_res);
671         }
672
673         return 0;
674 }
675 #else
676 #define acpi_parse_hpet NULL
677 #endif
678
679 #ifdef CONFIG_X86_PM_TIMER
680 extern u32 pmtmr_ioport;
681 #endif
682
683 static int __init acpi_parse_fadt(struct acpi_table_header *table)
684 {
685
686 #ifdef CONFIG_X86_PM_TIMER
687         /* detect the location of the ACPI PM Timer */
688         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
689                 /* FADT rev. 2 */
690                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
691                     ACPI_ADR_SPACE_SYSTEM_IO)
692                         return 0;
693
694                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
695                 /*
696                  * "X" fields are optional extensions to the original V1.0
697                  * fields, so we must selectively expand V1.0 fields if the
698                  * corresponding X field is zero.
699                  */
700                 if (!pmtmr_ioport)
701                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
702         } else {
703                 /* FADT rev. 1 */
704                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
705         }
706         if (pmtmr_ioport)
707                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
708                        pmtmr_ioport);
709 #endif
710         return 0;
711 }
712
713 unsigned long __init acpi_find_rsdp(void)
714 {
715         unsigned long rsdp_phys = 0;
716
717         if (efi_enabled) {
718                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
719                         return efi.acpi20;
720                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
721                         return efi.acpi;
722         }
723         /*
724          * Scan memory looking for the RSDP signature. First search EBDA (low
725          * memory) paragraphs and then search upper memory (E0000-FFFFF).
726          */
727         rsdp_phys = acpi_scan_rsdp(0, 0x400);
728         if (!rsdp_phys)
729                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
730
731         return rsdp_phys;
732 }
733
734 #ifdef  CONFIG_X86_LOCAL_APIC
735 /*
736  * Parse LAPIC entries in MADT
737  * returns 0 on success, < 0 on error
738  */
739 static int __init acpi_parse_madt_lapic_entries(void)
740 {
741         int count;
742
743         if (!cpu_has_apic)
744                 return -ENODEV;
745
746         /*
747          * Note that the LAPIC address is obtained from the MADT (32-bit value)
748          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
749          */
750
751         count =
752             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
753                                   acpi_parse_lapic_addr_ovr, 0);
754         if (count < 0) {
755                 printk(KERN_ERR PREFIX
756                        "Error parsing LAPIC address override entry\n");
757                 return count;
758         }
759
760         mp_register_lapic_address(acpi_lapic_addr);
761
762         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
763                                       MAX_APICS);
764         if (!count) {
765                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
766                 /* TBD: Cleanup to allow fallback to MPS */
767                 return -ENODEV;
768         } else if (count < 0) {
769                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
770                 /* TBD: Cleanup to allow fallback to MPS */
771                 return count;
772         }
773
774         count =
775             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
776         if (count < 0) {
777                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
778                 /* TBD: Cleanup to allow fallback to MPS */
779                 return count;
780         }
781         return 0;
782 }
783 #endif                          /* CONFIG_X86_LOCAL_APIC */
784
785 #ifdef  CONFIG_X86_IO_APIC
786 /*
787  * Parse IOAPIC related entries in MADT
788  * returns 0 on success, < 0 on error
789  */
790 static int __init acpi_parse_madt_ioapic_entries(void)
791 {
792         int count;
793
794         /*
795          * ACPI interpreter is required to complete interrupt setup,
796          * so if it is off, don't enumerate the io-apics with ACPI.
797          * If MPS is present, it will handle them,
798          * otherwise the system will stay in PIC mode
799          */
800         if (acpi_disabled || acpi_noirq) {
801                 return -ENODEV;
802         }
803
804         if (!cpu_has_apic)
805                 return -ENODEV;
806
807         /*
808          * if "noapic" boot option, don't look for IO-APICs
809          */
810         if (skip_ioapic_setup) {
811                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
812                        "due to 'noapic' option.\n");
813                 return -ENODEV;
814         }
815
816         count =
817             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
818                                   MAX_IO_APICS);
819         if (!count) {
820                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
821                 return -ENODEV;
822         } else if (count < 0) {
823                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
824                 return count;
825         }
826
827         count =
828             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
829                                   NR_IRQ_VECTORS);
830         if (count < 0) {
831                 printk(KERN_ERR PREFIX
832                        "Error parsing interrupt source overrides entry\n");
833                 /* TBD: Cleanup to allow fallback to MPS */
834                 return count;
835         }
836
837         /*
838          * If BIOS did not supply an INT_SRC_OVR for the SCI
839          * pretend we got one so we can set the SCI flags.
840          */
841         if (!acpi_sci_override_gsi)
842                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
843
844         /* Fill in identity legacy mapings where no override */
845         mp_config_acpi_legacy_irqs();
846
847         count =
848             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
849                                   NR_IRQ_VECTORS);
850         if (count < 0) {
851                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
852                 /* TBD: Cleanup to allow fallback to MPS */
853                 return count;
854         }
855
856         return 0;
857 }
858 #else
859 static inline int acpi_parse_madt_ioapic_entries(void)
860 {
861         return -1;
862 }
863 #endif  /* !CONFIG_X86_IO_APIC */
864
865 static void __init acpi_process_madt(void)
866 {
867 #ifdef CONFIG_X86_LOCAL_APIC
868         int count, error;
869
870         count = acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt);
871         if (count >= 1) {
872
873                 /*
874                  * Parse MADT LAPIC entries
875                  */
876                 error = acpi_parse_madt_lapic_entries();
877                 if (!error) {
878                         acpi_lapic = 1;
879
880 #ifdef CONFIG_X86_GENERICARCH
881                         generic_bigsmp_probe();
882 #endif
883                         /*
884                          * Parse MADT IO-APIC entries
885                          */
886                         error = acpi_parse_madt_ioapic_entries();
887                         if (!error) {
888                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
889                                 acpi_irq_balance_set(NULL);
890                                 acpi_ioapic = 1;
891
892                                 smp_found_config = 1;
893                                 clustered_apic_check();
894                         }
895                 }
896                 if (error == -EINVAL) {
897                         /*
898                          * Dell Precision Workstation 410, 610 come here.
899                          */
900                         printk(KERN_ERR PREFIX
901                                "Invalid BIOS MADT, disabling ACPI\n");
902                         disable_acpi();
903                 }
904         }
905 #endif
906         return;
907 }
908
909 #ifdef __i386__
910
911 static int __init disable_acpi_irq(struct dmi_system_id *d)
912 {
913         if (!acpi_force) {
914                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
915                        d->ident);
916                 acpi_noirq_set();
917         }
918         return 0;
919 }
920
921 static int __init disable_acpi_pci(struct dmi_system_id *d)
922 {
923         if (!acpi_force) {
924                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
925                        d->ident);
926                 acpi_disable_pci();
927         }
928         return 0;
929 }
930
931 static int __init dmi_disable_acpi(struct dmi_system_id *d)
932 {
933         if (!acpi_force) {
934                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
935                 disable_acpi();
936         } else {
937                 printk(KERN_NOTICE
938                        "Warning: DMI blacklist says broken, but acpi forced\n");
939         }
940         return 0;
941 }
942
943 /*
944  * Limit ACPI to CPU enumeration for HT
945  */
946 static int __init force_acpi_ht(struct dmi_system_id *d)
947 {
948         if (!acpi_force) {
949                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
950                        d->ident);
951                 disable_acpi();
952                 acpi_ht = 1;
953         } else {
954                 printk(KERN_NOTICE
955                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
956         }
957         return 0;
958 }
959
960 /*
961  * If your system is blacklisted here, but you find that acpi=force
962  * works for you, please contact acpi-devel@sourceforge.net
963  */
964 static struct dmi_system_id __initdata acpi_dmi_table[] = {
965         /*
966          * Boxes that need ACPI disabled
967          */
968         {
969          .callback = dmi_disable_acpi,
970          .ident = "IBM Thinkpad",
971          .matches = {
972                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
973                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
974                      },
975          },
976
977         /*
978          * Boxes that need acpi=ht
979          */
980         {
981          .callback = force_acpi_ht,
982          .ident = "FSC Primergy T850",
983          .matches = {
984                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
985                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
986                      },
987          },
988         {
989          .callback = force_acpi_ht,
990          .ident = "DELL GX240",
991          .matches = {
992                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
993                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
994                      },
995          },
996         {
997          .callback = force_acpi_ht,
998          .ident = "HP VISUALIZE NT Workstation",
999          .matches = {
1000                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1001                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1002                      },
1003          },
1004         {
1005          .callback = force_acpi_ht,
1006          .ident = "Compaq Workstation W8000",
1007          .matches = {
1008                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1009                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1010                      },
1011          },
1012         {
1013          .callback = force_acpi_ht,
1014          .ident = "ASUS P4B266",
1015          .matches = {
1016                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1017                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1018                      },
1019          },
1020         {
1021          .callback = force_acpi_ht,
1022          .ident = "ASUS P2B-DS",
1023          .matches = {
1024                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1025                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1026                      },
1027          },
1028         {
1029          .callback = force_acpi_ht,
1030          .ident = "ASUS CUR-DLS",
1031          .matches = {
1032                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1033                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1034                      },
1035          },
1036         {
1037          .callback = force_acpi_ht,
1038          .ident = "ABIT i440BX-W83977",
1039          .matches = {
1040                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1041                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1042                      },
1043          },
1044         {
1045          .callback = force_acpi_ht,
1046          .ident = "IBM Bladecenter",
1047          .matches = {
1048                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1049                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1050                      },
1051          },
1052         {
1053          .callback = force_acpi_ht,
1054          .ident = "IBM eServer xSeries 360",
1055          .matches = {
1056                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1057                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1058                      },
1059          },
1060         {
1061          .callback = force_acpi_ht,
1062          .ident = "IBM eserver xSeries 330",
1063          .matches = {
1064                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1065                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1066                      },
1067          },
1068         {
1069          .callback = force_acpi_ht,
1070          .ident = "IBM eserver xSeries 440",
1071          .matches = {
1072                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1073                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1074                      },
1075          },
1076
1077         /*
1078          * Boxes that need ACPI PCI IRQ routing disabled
1079          */
1080         {
1081          .callback = disable_acpi_irq,
1082          .ident = "ASUS A7V",
1083          .matches = {
1084                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1085                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1086                      /* newer BIOS, Revision 1011, does work */
1087                      DMI_MATCH(DMI_BIOS_VERSION,
1088                                "ASUS A7V ACPI BIOS Revision 1007"),
1089                      },
1090          },
1091
1092         /*
1093          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1094          */
1095         {                       /* _BBN 0 bug */
1096          .callback = disable_acpi_pci,
1097          .ident = "ASUS PR-DLS",
1098          .matches = {
1099                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1100                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1101                      DMI_MATCH(DMI_BIOS_VERSION,
1102                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1103                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1104                      },
1105          },
1106         {
1107          .callback = disable_acpi_pci,
1108          .ident = "Acer TravelMate 36x Laptop",
1109          .matches = {
1110                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1111                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1112                      },
1113          },
1114         {}
1115 };
1116
1117 #endif                          /* __i386__ */
1118
1119 /*
1120  * acpi_boot_table_init() and acpi_boot_init()
1121  *  called from setup_arch(), always.
1122  *      1. checksums all tables
1123  *      2. enumerates lapics
1124  *      3. enumerates io-apics
1125  *
1126  * acpi_table_init() is separate to allow reading SRAT without
1127  * other side effects.
1128  *
1129  * side effects of acpi_boot_init:
1130  *      acpi_lapic = 1 if LAPIC found
1131  *      acpi_ioapic = 1 if IOAPIC found
1132  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1133  *      if acpi_blacklisted() acpi_disabled = 1;
1134  *      acpi_irq_model=...
1135  *      ...
1136  *
1137  * return value: (currently ignored)
1138  *      0: success
1139  *      !0: failure
1140  */
1141
1142 int __init acpi_boot_table_init(void)
1143 {
1144         int error;
1145
1146 #ifdef __i386__
1147         dmi_check_system(acpi_dmi_table);
1148 #endif
1149
1150         /*
1151          * If acpi_disabled, bail out
1152          * One exception: acpi=ht continues far enough to enumerate LAPICs
1153          */
1154         if (acpi_disabled && !acpi_ht)
1155                 return 1;
1156
1157         /*
1158          * Initialize the ACPI boot-time table parser.
1159          */
1160         error = acpi_table_init();
1161         if (error) {
1162                 disable_acpi();
1163                 return error;
1164         }
1165
1166         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1167
1168         /*
1169          * blacklist may disable ACPI entirely
1170          */
1171         error = acpi_blacklisted();
1172         if (error) {
1173                 if (acpi_force) {
1174                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1175                 } else {
1176                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1177                         disable_acpi();
1178                         return error;
1179                 }
1180         }
1181
1182         return 0;
1183 }
1184
1185 int __init acpi_boot_init(void)
1186 {
1187         /*
1188          * If acpi_disabled, bail out
1189          * One exception: acpi=ht continues far enough to enumerate LAPICs
1190          */
1191         if (acpi_disabled && !acpi_ht)
1192                 return 1;
1193
1194         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1195
1196         /*
1197          * set sci_int and PM timer address
1198          */
1199         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1200
1201         /*
1202          * Process the Multiple APIC Description Table (MADT), if present
1203          */
1204         acpi_process_madt();
1205
1206         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1207
1208         return 0;
1209 }
1210
1211 static int __init parse_acpi(char *arg)
1212 {
1213         if (!arg)
1214                 return -EINVAL;
1215
1216         /* "acpi=off" disables both ACPI table parsing and interpreter */
1217         if (strcmp(arg, "off") == 0) {
1218                 disable_acpi();
1219         }
1220         /* acpi=force to over-ride black-list */
1221         else if (strcmp(arg, "force") == 0) {
1222                 acpi_force = 1;
1223                 acpi_ht = 1;
1224                 acpi_disabled = 0;
1225         }
1226         /* acpi=strict disables out-of-spec workarounds */
1227         else if (strcmp(arg, "strict") == 0) {
1228                 acpi_strict = 1;
1229         }
1230         /* Limit ACPI just to boot-time to enable HT */
1231         else if (strcmp(arg, "ht") == 0) {
1232                 if (!acpi_force)
1233                         disable_acpi();
1234                 acpi_ht = 1;
1235         }
1236         /* "acpi=noirq" disables ACPI interrupt routing */
1237         else if (strcmp(arg, "noirq") == 0) {
1238                 acpi_noirq_set();
1239         } else {
1240                 /* Core will printk when we return error. */
1241                 return -EINVAL;
1242         }
1243         return 0;
1244 }
1245 early_param("acpi", parse_acpi);
1246
1247 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1248 static int __init parse_pci(char *arg)
1249 {
1250         if (arg && strcmp(arg, "noacpi") == 0)
1251                 acpi_disable_pci();
1252         return 0;
1253 }
1254 early_param("pci", parse_pci);
1255
1256 #ifdef CONFIG_X86_IO_APIC
1257 static int __init parse_acpi_skip_timer_override(char *arg)
1258 {
1259         acpi_skip_timer_override = 1;
1260         return 0;
1261 }
1262 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1263
1264 static int __init parse_acpi_use_timer_override(char *arg)
1265 {
1266         acpi_use_timer_override = 1;
1267         return 0;
1268 }
1269 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1270 #endif /* CONFIG_X86_IO_APIC */
1271
1272 static int __init setup_acpi_sci(char *s)
1273 {
1274         if (!s)
1275                 return -EINVAL;
1276         if (!strcmp(s, "edge"))
1277                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1278                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1279         else if (!strcmp(s, "level"))
1280                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1281                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1282         else if (!strcmp(s, "high"))
1283                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1284                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1285         else if (!strcmp(s, "low"))
1286                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1287                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1288         else
1289                 return -EINVAL;
1290         return 0;
1291 }
1292 early_param("acpi_sci", setup_acpi_sci);
1293
1294 int __acpi_acquire_global_lock(unsigned int *lock)
1295 {
1296         unsigned int old, new, val;
1297         do {
1298                 old = *lock;
1299                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1300                 val = cmpxchg(lock, old, new);
1301         } while (unlikely (val != old));
1302         return (new < 3) ? -1 : 0;
1303 }
1304
1305 int __acpi_release_global_lock(unsigned int *lock)
1306 {
1307         unsigned int old, new, val;
1308         do {
1309                 old = *lock;
1310                 new = old & ~0x3;
1311                 val = cmpxchg(lock, old, new);
1312         } while (unlikely (val != old));
1313         return old & 0x1;
1314 }