?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'misc' into release
[linux-2.6/mini2440.git] / arch / x86 / kernel / acpi / boot.c
blob39ae3d0e3a4a7e0cf6521bbbea5bd05058e152cd
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/genapic.h>
41 #include <asm/io.h>
42 #include <asm/mpspec.h>
43 #include <asm/smp.h>
44
45 #ifdef CONFIG_X86_LOCAL_APIC
46 # include <mach_apic.h>
47 #endif
48
49 static int __initdata acpi_force = 0;
50 u32 acpi_rsdt_forced;
51 #ifdef CONFIG_ACPI
52 int acpi_disabled = 0;
53 #else
54 int acpi_disabled = 1;
55 #endif
56 EXPORT_SYMBOL(acpi_disabled);
57
58 #ifdef CONFIG_X86_64
59
60 #include <asm/proto.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
110 /*
111 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
112 * to map the target physical address. The problem is that set_fixmap()
113 * provides a single page, and it is possible that the page is not
114 * sufficient.
115 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
116 * i.e. until the next __va_range() call.
117 *
118 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
119 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
120 * count idx down while incrementing the phys address.
121 */
122 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
123 {
124 unsigned long base, offset, mapped_size;
125 int idx;
126
127 if (!phys || !size)
128 return NULL;
129
130 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
131 return __va(phys);
132
133 offset = phys & (PAGE_SIZE - 1);
134 mapped_size = PAGE_SIZE - offset;
135 clear_fixmap(FIX_ACPI_END);
136 set_fixmap(FIX_ACPI_END, phys);
137 base = fix_to_virt(FIX_ACPI_END);
138
139 /*
140 * Most cases can be covered by the below.
141 */
142 idx = FIX_ACPI_END;
143 while (mapped_size < size) {
144 if (--idx < FIX_ACPI_BEGIN)
145 return NULL; /* cannot handle this */
146 phys += PAGE_SIZE;
147 clear_fixmap(idx);
148 set_fixmap(idx, phys);
149 mapped_size += PAGE_SIZE;
150 }
151
152 return ((unsigned char *)base + offset);
153 }
154
155 #ifdef CONFIG_PCI_MMCONFIG
156
157 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
158
159 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
160 struct acpi_mcfg_allocation *pci_mmcfg_config;
161 int pci_mmcfg_config_num;
162
163 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
164 {
165 if (!strcmp(mcfg->header.oem_id, "SGI"))
166 acpi_mcfg_64bit_base_addr = TRUE;
167
168 return 0;
169 }
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
204 acpi_mcfg_oem_check(mcfg);
205
206 for (i = 0; i < pci_mmcfg_config_num; ++i) {
207 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
208 !acpi_mcfg_64bit_base_addr) {
209 printk(KERN_ERR PREFIX
210 "MMCONFIG not in low 4GB of memory\n");
211 kfree(pci_mmcfg_config);
212 pci_mmcfg_config_num = 0;
213 return -ENODEV;
214 }
215 }
216
217 return 0;
218 }
219 #endif /* CONFIG_PCI_MMCONFIG */
220
221 #ifdef CONFIG_X86_LOCAL_APIC
222 static int __init acpi_parse_madt(struct acpi_table_header *table)
223 {
224 struct acpi_table_madt *madt = NULL;
225
226 if (!cpu_has_apic)
227 return -EINVAL;
228
229 madt = (struct acpi_table_madt *)table;
230 if (!madt) {
231 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
232 return -ENODEV;
233 }
234
235 if (madt->address) {
236 acpi_lapic_addr = (u64) madt->address;
237
238 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
239 madt->address);
240 }
241
242 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
243
244 return 0;
245 }
246
247 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
248 {
249 unsigned int ver = 0;
250
251 if (!enabled) {
252 ++disabled_cpus;
253 return;
254 }
255
256 if (boot_cpu_physical_apicid != -1U)
257 ver = apic_version[boot_cpu_physical_apicid];
258
259 generic_processor_info(id, ver);
260 }
261
262 static int __init
263 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
264 {
265 struct acpi_madt_local_apic *processor = NULL;
266
267 processor = (struct acpi_madt_local_apic *)header;
268
269 if (BAD_MADT_ENTRY(processor, end))
270 return -EINVAL;
271
272 acpi_table_print_madt_entry(header);
273
274 /*
275 * We need to register disabled CPU as well to permit
276 * counting disabled CPUs. This allows us to size
277 * cpus_possible_map more accurately, to permit
278 * to not preallocating memory for all NR_CPUS
279 * when we use CPU hotplug.
280 */
281 acpi_register_lapic(processor->id, /* APIC ID */
282 processor->lapic_flags & ACPI_MADT_ENABLED);
283
284 return 0;
285 }
286
287 static int __init
288 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
289 {
290 struct acpi_madt_local_sapic *processor = NULL;
291
292 processor = (struct acpi_madt_local_sapic *)header;
293
294 if (BAD_MADT_ENTRY(processor, end))
295 return -EINVAL;
296
297 acpi_table_print_madt_entry(header);
298
299 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
300 processor->lapic_flags & ACPI_MADT_ENABLED);
301
302 return 0;
303 }
304
305 static int __init
306 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
307 const unsigned long end)
308 {
309 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
310
311 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
312
313 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
314 return -EINVAL;
315
316 acpi_lapic_addr = lapic_addr_ovr->address;
317
318 return 0;
319 }
320
321 static int __init
322 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
323 {
324 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
325
326 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
327
328 if (BAD_MADT_ENTRY(lapic_nmi, end))
329 return -EINVAL;
330
331 acpi_table_print_madt_entry(header);
332
333 if (lapic_nmi->lint != 1)
334 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
335
336 return 0;
337 }
338
339 #endif /*CONFIG_X86_LOCAL_APIC */
340
341 #ifdef CONFIG_X86_IO_APIC
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 = read_apic_id();
777 apic_version[boot_cpu_physical_apicid] =
778 GET_APIC_VERSION(apic_read(APIC_LVR));
779 }
780 }
781
782 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
783 {
784 int count;
785
786 if (!cpu_has_apic)
787 return -ENODEV;
788
789 /*
790 * Note that the LAPIC address is obtained from the MADT (32-bit value)
791 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
792 */
793
794 count =
795 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
796 acpi_parse_lapic_addr_ovr, 0);
797 if (count < 0) {
798 printk(KERN_ERR PREFIX
799 "Error parsing LAPIC address override entry\n");
800 return count;
801 }
802
803 acpi_register_lapic_address(acpi_lapic_addr);
804
805 return count;
806 }
807
808 static int __init acpi_parse_madt_lapic_entries(void)
809 {
810 int count;
811
812 if (!cpu_has_apic)
813 return -ENODEV;
814
815 /*
816 * Note that the LAPIC address is obtained from the MADT (32-bit value)
817 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
818 */
819
820 count =
821 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
822 acpi_parse_lapic_addr_ovr, 0);
823 if (count < 0) {
824 printk(KERN_ERR PREFIX
825 "Error parsing LAPIC address override entry\n");
826 return count;
827 }
828
829 acpi_register_lapic_address(acpi_lapic_addr);
830
831 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
832 acpi_parse_sapic, MAX_APICS);
833
834 if (!count)
835 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
836 acpi_parse_lapic, MAX_APICS);
837 if (!count) {
838 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
839 /* TBD: Cleanup to allow fallback to MPS */
840 return -ENODEV;
841 } else if (count < 0) {
842 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
843 /* TBD: Cleanup to allow fallback to MPS */
844 return count;
845 }
846
847 count =
848 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
849 if (count < 0) {
850 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
851 /* TBD: Cleanup to allow fallback to MPS */
852 return count;
853 }
854 return 0;
855 }
856 #endif /* CONFIG_X86_LOCAL_APIC */
857
858 #ifdef CONFIG_X86_IO_APIC
859 #define MP_ISA_BUS 0
860
861 #ifdef CONFIG_X86_ES7000
862 extern int es7000_plat;
863 #endif
864
865 static struct {
866 int apic_id;
867 int gsi_base;
868 int gsi_end;
869 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
870 } mp_ioapic_routing[MAX_IO_APICS];
871
872 static int mp_find_ioapic(int gsi)
873 {
874 int i = 0;
875
876 /* Find the IOAPIC that manages this GSI. */
877 for (i = 0; i < nr_ioapics; i++) {
878 if ((gsi >= mp_ioapic_routing[i].gsi_base)
879 && (gsi <= mp_ioapic_routing[i].gsi_end))
880 return i;
881 }
882
883 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
884 return -1;
885 }
886
887 static u8 __init uniq_ioapic_id(u8 id)
888 {
889 #ifdef CONFIG_X86_32
890 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
891 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
892 return io_apic_get_unique_id(nr_ioapics, id);
893 else
894 return id;
895 #else
896 int i;
897 DECLARE_BITMAP(used, 256);
898 bitmap_zero(used, 256);
899 for (i = 0; i < nr_ioapics; i++) {
900 struct mp_config_ioapic *ia = &mp_ioapics[i];
901 __set_bit(ia->mp_apicid, used);
902 }
903 if (!test_bit(id, used))
904 return id;
905 return find_first_zero_bit(used, 256);
906 #endif
907 }
908
909 static int bad_ioapic(unsigned long address)
910 {
911 if (nr_ioapics >= MAX_IO_APICS) {
912 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
913 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
914 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
915 }
916 if (!address) {
917 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
918 " found in table, skipping!\n");
919 return 1;
920 }
921 return 0;
922 }
923
924 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
925 {
926 int idx = 0;
927
928 if (bad_ioapic(address))
929 return;
930
931 idx = nr_ioapics;
932
933 mp_ioapics[idx].mp_type = MP_IOAPIC;
934 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
935 mp_ioapics[idx].mp_apicaddr = address;
936
937 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
938 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
939 #ifdef CONFIG_X86_32
940 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
941 #else
942 mp_ioapics[idx].mp_apicver = 0;
943 #endif
944 /*
945 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
946 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
947 */
948 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
949 mp_ioapic_routing[idx].gsi_base = gsi_base;
950 mp_ioapic_routing[idx].gsi_end = gsi_base +
951 io_apic_get_redir_entries(idx);
952
953 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
954 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
955 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
956 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
957
958 nr_ioapics++;
959 }
960
961 static void assign_to_mp_irq(struct mp_config_intsrc *m,
962 struct mp_config_intsrc *mp_irq)
963 {
964 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
965 }
966
967 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
968 struct mp_config_intsrc *m)
969 {
970 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
971 }
972
973 static void save_mp_irq(struct mp_config_intsrc *m)
974 {
975 int i;
976
977 for (i = 0; i < mp_irq_entries; i++) {
978 if (!mp_irq_cmp(&mp_irqs[i], m))
979 return;
980 }
981
982 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
983 if (++mp_irq_entries == MAX_IRQ_SOURCES)
984 panic("Max # of irq sources exceeded!!\n");
985 }
986
987 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
988 {
989 int ioapic;
990 int pin;
991 struct mp_config_intsrc mp_irq;
992
993 /*
994 * Convert 'gsi' to 'ioapic.pin'.
995 */
996 ioapic = mp_find_ioapic(gsi);
997 if (ioapic < 0)
998 return;
999 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1000
1001 /*
1002 * TBD: This check is for faulty timer entries, where the override
1003 * erroneously sets the trigger to level, resulting in a HUGE
1004 * increase of timer interrupts!
1005 */
1006 if ((bus_irq == 0) && (trigger == 3))
1007 trigger = 1;
1008
1009 mp_irq.mp_type = MP_INTSRC;
1010 mp_irq.mp_irqtype = mp_INT;
1011 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1012 mp_irq.mp_srcbus = MP_ISA_BUS;
1013 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1014 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1015 mp_irq.mp_dstirq = pin; /* INTIN# */
1016
1017 save_mp_irq(&mp_irq);
1018 }
1019
1020 void __init mp_config_acpi_legacy_irqs(void)
1021 {
1022 int i;
1023 int ioapic;
1024 unsigned int dstapic;
1025 struct mp_config_intsrc mp_irq;
1026
1027 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1028 /*
1029 * Fabricate the legacy ISA bus (bus #31).
1030 */
1031 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1032 #endif
1033 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1034 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1035
1036 #ifdef CONFIG_X86_ES7000
1037 /*
1038 * Older generations of ES7000 have no legacy identity mappings
1039 */
1040 if (es7000_plat == 1)
1041 return;
1042 #endif
1043
1044 /*
1045 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1046 */
1047 ioapic = mp_find_ioapic(0);
1048 if (ioapic < 0)
1049 return;
1050 dstapic = mp_ioapics[ioapic].mp_apicid;
1051
1052 /*
1053 * Use the default configuration for the IRQs 0-15. Unless
1054 * overridden by (MADT) interrupt source override entries.
1055 */
1056 for (i = 0; i < 16; i++) {
1057 int idx;
1058
1059 for (idx = 0; idx < mp_irq_entries; idx++) {
1060 struct mp_config_intsrc *irq = mp_irqs + idx;
1061
1062 /* Do we already have a mapping for this ISA IRQ? */
1063 if (irq->mp_srcbus == MP_ISA_BUS
1064 && irq->mp_srcbusirq == i)
1065 break;
1066
1067 /* Do we already have a mapping for this IOAPIC pin */
1068 if (irq->mp_dstapic == dstapic &&
1069 irq->mp_dstirq == i)
1070 break;
1071 }
1072
1073 if (idx != mp_irq_entries) {
1074 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1075 continue; /* IRQ already used */
1076 }
1077
1078 mp_irq.mp_type = MP_INTSRC;
1079 mp_irq.mp_irqflag = 0; /* Conforming */
1080 mp_irq.mp_srcbus = MP_ISA_BUS;
1081 mp_irq.mp_dstapic = dstapic;
1082 mp_irq.mp_irqtype = mp_INT;
1083 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1084 mp_irq.mp_dstirq = i;
1085
1086 save_mp_irq(&mp_irq);
1087 }
1088 }
1089
1090 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1091 {
1092 int ioapic;
1093 int ioapic_pin;
1094 #ifdef CONFIG_X86_32
1095 #define MAX_GSI_NUM 4096
1096 #define IRQ_COMPRESSION_START 64
1097
1098 static int pci_irq = IRQ_COMPRESSION_START;
1099 /*
1100 * Mapping between Global System Interrupts, which
1101 * represent all possible interrupts, and IRQs
1102 * assigned to actual devices.
1103 */
1104 static int gsi_to_irq[MAX_GSI_NUM];
1105 #else
1106
1107 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1108 return gsi;
1109 #endif
1110
1111 /* Don't set up the ACPI SCI because it's already set up */
1112 if (acpi_gbl_FADT.sci_interrupt == gsi)
1113 return gsi;
1114
1115 ioapic = mp_find_ioapic(gsi);
1116 if (ioapic < 0) {
1117 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1118 return gsi;
1119 }
1120
1121 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1122
1123 #ifdef CONFIG_X86_32
1124 if (ioapic_renumber_irq)
1125 gsi = ioapic_renumber_irq(ioapic, gsi);
1126 #endif
1127
1128 /*
1129 * Avoid pin reprogramming. PRTs typically include entries
1130 * with redundant pin->gsi mappings (but unique PCI devices);
1131 * we only program the IOAPIC on the first.
1132 */
1133 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1134 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1135 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1136 ioapic_pin);
1137 return gsi;
1138 }
1139 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1140 pr_debug("Pin %d-%d already programmed\n",
1141 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1142 #ifdef CONFIG_X86_32
1143 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1144 #else
1145 return gsi;
1146 #endif
1147 }
1148
1149 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1150 #ifdef CONFIG_X86_32
1151 /*
1152 * For GSI >= 64, use IRQ compression
1153 */
1154 if ((gsi >= IRQ_COMPRESSION_START)
1155 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1156 /*
1157 * For PCI devices assign IRQs in order, avoiding gaps
1158 * due to unused I/O APIC pins.
1159 */
1160 int irq = gsi;
1161 if (gsi < MAX_GSI_NUM) {
1162 /*
1163 * Retain the VIA chipset work-around (gsi > 15), but
1164 * avoid a problem where the 8254 timer (IRQ0) is setup
1165 * via an override (so it's not on pin 0 of the ioapic),
1166 * and at the same time, the pin 0 interrupt is a PCI
1167 * type. The gsi > 15 test could cause these two pins
1168 * to be shared as IRQ0, and they are not shareable.
1169 * So test for this condition, and if necessary, avoid
1170 * the pin collision.
1171 */
1172 gsi = pci_irq++;
1173 /*
1174 * Don't assign IRQ used by ACPI SCI
1175 */
1176 if (gsi == acpi_gbl_FADT.sci_interrupt)
1177 gsi = pci_irq++;
1178 gsi_to_irq[irq] = gsi;
1179 } else {
1180 printk(KERN_ERR "GSI %u is too high\n", gsi);
1181 return gsi;
1182 }
1183 }
1184 #endif
1185 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1186 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1187 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1188 return gsi;
1189 }
1190
1191 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1192 u32 gsi, int triggering, int polarity)
1193 {
1194 #ifdef CONFIG_X86_MPPARSE
1195 struct mp_config_intsrc mp_irq;
1196 int ioapic;
1197
1198 if (!acpi_ioapic)
1199 return 0;
1200
1201 /* print the entry should happen on mptable identically */
1202 mp_irq.mp_type = MP_INTSRC;
1203 mp_irq.mp_irqtype = mp_INT;
1204 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1205 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1206 mp_irq.mp_srcbus = number;
1207 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1208 ioapic = mp_find_ioapic(gsi);
1209 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1210 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1211
1212 save_mp_irq(&mp_irq);
1213 #endif
1214 return 0;
1215 }
1216
1217 /*
1218 * Parse IOAPIC related entries in MADT
1219 * returns 0 on success, < 0 on error
1220 */
1221 static int __init acpi_parse_madt_ioapic_entries(void)
1222 {
1223 int count;
1224
1225 /*
1226 * ACPI interpreter is required to complete interrupt setup,
1227 * so if it is off, don't enumerate the io-apics with ACPI.
1228 * If MPS is present, it will handle them,
1229 * otherwise the system will stay in PIC mode
1230 */
1231 if (acpi_disabled || acpi_noirq) {
1232 return -ENODEV;
1233 }
1234
1235 if (!cpu_has_apic)
1236 return -ENODEV;
1237
1238 /*
1239 * if "noapic" boot option, don't look for IO-APICs
1240 */
1241 if (skip_ioapic_setup) {
1242 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1243 "due to 'noapic' option.\n");
1244 return -ENODEV;
1245 }
1246
1247 count =
1248 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1249 MAX_IO_APICS);
1250 if (!count) {
1251 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1252 return -ENODEV;
1253 } else if (count < 0) {
1254 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1255 return count;
1256 }
1257
1258 count =
1259 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1260 nr_irqs);
1261 if (count < 0) {
1262 printk(KERN_ERR PREFIX
1263 "Error parsing interrupt source overrides entry\n");
1264 /* TBD: Cleanup to allow fallback to MPS */
1265 return count;
1266 }
1267
1268 /*
1269 * If BIOS did not supply an INT_SRC_OVR for the SCI
1270 * pretend we got one so we can set the SCI flags.
1271 */
1272 if (!acpi_sci_override_gsi)
1273 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1274
1275 /* Fill in identity legacy mapings where no override */
1276 mp_config_acpi_legacy_irqs();
1277
1278 count =
1279 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1280 nr_irqs);
1281 if (count < 0) {
1282 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1283 /* TBD: Cleanup to allow fallback to MPS */
1284 return count;
1285 }
1286
1287 return 0;
1288 }
1289 #else
1290 static inline int acpi_parse_madt_ioapic_entries(void)
1291 {
1292 return -1;
1293 }
1294 #endif /* !CONFIG_X86_IO_APIC */
1295
1296 static void __init early_acpi_process_madt(void)
1297 {
1298 #ifdef CONFIG_X86_LOCAL_APIC
1299 int error;
1300
1301 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1302
1303 /*
1304 * Parse MADT LAPIC entries
1305 */
1306 error = early_acpi_parse_madt_lapic_addr_ovr();
1307 if (!error) {
1308 acpi_lapic = 1;
1309 smp_found_config = 1;
1310 }
1311 if (error == -EINVAL) {
1312 /*
1313 * Dell Precision Workstation 410, 610 come here.
1314 */
1315 printk(KERN_ERR PREFIX
1316 "Invalid BIOS MADT, disabling ACPI\n");
1317 disable_acpi();
1318 }
1319 }
1320 #endif
1321 }
1322
1323 static void __init acpi_process_madt(void)
1324 {
1325 #ifdef CONFIG_X86_LOCAL_APIC
1326 int error;
1327
1328 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1329
1330 /*
1331 * Parse MADT LAPIC entries
1332 */
1333 error = acpi_parse_madt_lapic_entries();
1334 if (!error) {
1335 acpi_lapic = 1;
1336
1337 #ifdef CONFIG_X86_GENERICARCH
1338 generic_bigsmp_probe();
1339 #endif
1340 /*
1341 * Parse MADT IO-APIC entries
1342 */
1343 error = acpi_parse_madt_ioapic_entries();
1344 if (!error) {
1345 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1346 acpi_ioapic = 1;
1347
1348 smp_found_config = 1;
1349 #ifdef CONFIG_X86_32
1350 setup_apic_routing();
1351 #endif
1352 }
1353 }
1354 if (error == -EINVAL) {
1355 /*
1356 * Dell Precision Workstation 410, 610 come here.
1357 */
1358 printk(KERN_ERR PREFIX
1359 "Invalid BIOS MADT, disabling ACPI\n");
1360 disable_acpi();
1361 }
1362 } else {
1363 /*
1364 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1365 * In the event an MPS table was found, forget it.
1366 * Boot with "acpi=off" to use MPS on such a system.
1367 */
1368 if (smp_found_config) {
1369 printk(KERN_WARNING PREFIX
1370 "No APIC-table, disabling MPS\n");
1371 smp_found_config = 0;
1372 }
1373 }
1374 #endif
1375 return;
1376 }
1377
1378 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1379 {
1380 if (!acpi_force) {
1381 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1382 d->ident);
1383 acpi_noirq_set();
1384 }
1385 return 0;
1386 }
1387
1388 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1389 {
1390 if (!acpi_force) {
1391 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1392 d->ident);
1393 acpi_disable_pci();
1394 }
1395 return 0;
1396 }
1397
1398 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1399 {
1400 if (!acpi_force) {
1401 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1402 disable_acpi();
1403 } else {
1404 printk(KERN_NOTICE
1405 "Warning: DMI blacklist says broken, but acpi forced\n");
1406 }
1407 return 0;
1408 }
1409
1410 /*
1411 * Limit ACPI to CPU enumeration for HT
1412 */
1413 static int __init force_acpi_ht(const struct dmi_system_id *d)
1414 {
1415 if (!acpi_force) {
1416 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1417 d->ident);
1418 disable_acpi();
1419 acpi_ht = 1;
1420 } else {
1421 printk(KERN_NOTICE
1422 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1423 }
1424 return 0;
1425 }
1426
1427 /*
1428 * Force ignoring BIOS IRQ0 pin2 override
1429 */
1430 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1431 {
1432 /*
1433 * The ati_ixp4x0_rev() early PCI quirk should have set
1434 * the acpi_skip_timer_override flag already:
1435 */
1436 if (!acpi_skip_timer_override) {
1437 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1438 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1439 d->ident);
1440 acpi_skip_timer_override = 1;
1441 }
1442 return 0;
1443 }
1444
1445 /*
1446 * If your system is blacklisted here, but you find that acpi=force
1447 * works for you, please contact acpi-devel@sourceforge.net
1448 */
1449 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1450 /*
1451 * Boxes that need ACPI disabled
1452 */
1453 {
1454 .callback = dmi_disable_acpi,
1455 .ident = "IBM Thinkpad",
1456 .matches = {
1457 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1458 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1459 },
1460 },
1461
1462 /*
1463 * Boxes that need acpi=ht
1464 */
1465 {
1466 .callback = force_acpi_ht,
1467 .ident = "FSC Primergy T850",
1468 .matches = {
1469 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1470 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1471 },
1472 },
1473 {
1474 .callback = force_acpi_ht,
1475 .ident = "HP VISUALIZE NT Workstation",
1476 .matches = {
1477 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1478 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1479 },
1480 },
1481 {
1482 .callback = force_acpi_ht,
1483 .ident = "Compaq Workstation W8000",
1484 .matches = {
1485 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1487 },
1488 },
1489 {
1490 .callback = force_acpi_ht,
1491 .ident = "ASUS P4B266",
1492 .matches = {
1493 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1494 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1495 },
1496 },
1497 {
1498 .callback = force_acpi_ht,
1499 .ident = "ASUS P2B-DS",
1500 .matches = {
1501 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1502 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1503 },
1504 },
1505 {
1506 .callback = force_acpi_ht,
1507 .ident = "ASUS CUR-DLS",
1508 .matches = {
1509 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1510 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1511 },
1512 },
1513 {
1514 .callback = force_acpi_ht,
1515 .ident = "ABIT i440BX-W83977",
1516 .matches = {
1517 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1518 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1519 },
1520 },
1521 {
1522 .callback = force_acpi_ht,
1523 .ident = "IBM Bladecenter",
1524 .matches = {
1525 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1526 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1527 },
1528 },
1529 {
1530 .callback = force_acpi_ht,
1531 .ident = "IBM eServer xSeries 360",
1532 .matches = {
1533 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1534 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1535 },
1536 },
1537 {
1538 .callback = force_acpi_ht,
1539 .ident = "IBM eserver xSeries 330",
1540 .matches = {
1541 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1542 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1543 },
1544 },
1545 {
1546 .callback = force_acpi_ht,
1547 .ident = "IBM eserver xSeries 440",
1548 .matches = {
1549 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1550 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1551 },
1552 },
1553
1554 /*
1555 * Boxes that need ACPI PCI IRQ routing disabled
1556 */
1557 {
1558 .callback = disable_acpi_irq,
1559 .ident = "ASUS A7V",
1560 .matches = {
1561 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1562 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1563 /* newer BIOS, Revision 1011, does work */
1564 DMI_MATCH(DMI_BIOS_VERSION,
1565 "ASUS A7V ACPI BIOS Revision 1007"),
1566 },
1567 },
1568 {
1569 /*
1570 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1571 * for LPC bridge, which is needed for the PCI
1572 * interrupt links to work. DSDT fix is in bug 5966.
1573 * 2645, 2646 model numbers are shared with 600/600E/600X
1574 */
1575 .callback = disable_acpi_irq,
1576 .ident = "IBM Thinkpad 600 Series 2645",
1577 .matches = {
1578 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1579 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1580 },
1581 },
1582 {
1583 .callback = disable_acpi_irq,
1584 .ident = "IBM Thinkpad 600 Series 2646",
1585 .matches = {
1586 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1587 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1588 },
1589 },
1590 /*
1591 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1592 */
1593 { /* _BBN 0 bug */
1594 .callback = disable_acpi_pci,
1595 .ident = "ASUS PR-DLS",
1596 .matches = {
1597 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1598 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1599 DMI_MATCH(DMI_BIOS_VERSION,
1600 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1601 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1602 },
1603 },
1604 {
1605 .callback = disable_acpi_pci,
1606 .ident = "Acer TravelMate 36x Laptop",
1607 .matches = {
1608 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1609 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1610 },
1611 },
1612 {}
1613 };
1614
1615 /* second table for DMI checks that should run after early-quirks */
1616 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1617 /*
1618 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1619 * which includes some code which overrides all temperature
1620 * trip points to 16C if the INTIN2 input of the I/O APIC
1621 * is enabled. This input is incorrectly designated the
1622 * ISA IRQ 0 via an interrupt source override even though
1623 * it is wired to the output of the master 8259A and INTIN0
1624 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1625 * override in that cases.
1626 */
1627 {
1628 .callback = dmi_ignore_irq0_timer_override,
1629 .ident = "HP nx6115 laptop",
1630 .matches = {
1631 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1632 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1633 },
1634 },
1635 {
1636 .callback = dmi_ignore_irq0_timer_override,
1637 .ident = "HP NX6125 laptop",
1638 .matches = {
1639 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1640 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1641 },
1642 },
1643 {
1644 .callback = dmi_ignore_irq0_timer_override,
1645 .ident = "HP NX6325 laptop",
1646 .matches = {
1647 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1648 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1649 },
1650 },
1651 {
1652 .callback = dmi_ignore_irq0_timer_override,
1653 .ident = "HP 6715b laptop",
1654 .matches = {
1655 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1656 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1657 },
1658 },
1659 {}
1660 };
1661
1662 /*
1663 * acpi_boot_table_init() and acpi_boot_init()
1664 * called from setup_arch(), always.
1665 * 1. checksums all tables
1666 * 2. enumerates lapics
1667 * 3. enumerates io-apics
1668 *
1669 * acpi_table_init() is separate to allow reading SRAT without
1670 * other side effects.
1671 *
1672 * side effects of acpi_boot_init:
1673 * acpi_lapic = 1 if LAPIC found
1674 * acpi_ioapic = 1 if IOAPIC found
1675 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1676 * if acpi_blacklisted() acpi_disabled = 1;
1677 * acpi_irq_model=...
1678 * ...
1679 *
1680 * return value: (currently ignored)
1681 * 0: success
1682 * !0: failure
1683 */
1684
1685 int __init acpi_boot_table_init(void)
1686 {
1687 int error;
1688
1689 dmi_check_system(acpi_dmi_table);
1690
1691 /*
1692 * If acpi_disabled, bail out
1693 * One exception: acpi=ht continues far enough to enumerate LAPICs
1694 */
1695 if (acpi_disabled && !acpi_ht)
1696 return 1;
1697
1698 /*
1699 * Initialize the ACPI boot-time table parser.
1700 */
1701 error = acpi_table_init();
1702 if (error) {
1703 disable_acpi();
1704 return error;
1705 }
1706
1707 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1708
1709 /*
1710 * blacklist may disable ACPI entirely
1711 */
1712 error = acpi_blacklisted();
1713 if (error) {
1714 if (acpi_force) {
1715 printk(KERN_WARNING PREFIX "acpi=force override\n");
1716 } else {
1717 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1718 disable_acpi();
1719 return error;
1720 }
1721 }
1722
1723 return 0;
1724 }
1725
1726 int __init early_acpi_boot_init(void)
1727 {
1728 /*
1729 * If acpi_disabled, bail out
1730 * One exception: acpi=ht continues far enough to enumerate LAPICs
1731 */
1732 if (acpi_disabled && !acpi_ht)
1733 return 1;
1734
1735 /*
1736 * Process the Multiple APIC Description Table (MADT), if present
1737 */
1738 early_acpi_process_madt();
1739
1740 return 0;
1741 }
1742
1743 int __init acpi_boot_init(void)
1744 {
1745 /* those are executed after early-quirks are executed */
1746 dmi_check_system(acpi_dmi_table_late);
1747
1748 /*
1749 * If acpi_disabled, bail out
1750 * One exception: acpi=ht continues far enough to enumerate LAPICs
1751 */
1752 if (acpi_disabled && !acpi_ht)
1753 return 1;
1754
1755 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1756
1757 /*
1758 * set sci_int and PM timer address
1759 */
1760 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1761
1762 /*
1763 * Process the Multiple APIC Description Table (MADT), if present
1764 */
1765 acpi_process_madt();
1766
1767 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1768
1769 return 0;
1770 }
1771
1772 static int __init parse_acpi(char *arg)
1773 {
1774 if (!arg)
1775 return -EINVAL;
1776
1777 /* "acpi=off" disables both ACPI table parsing and interpreter */
1778 if (strcmp(arg, "off") == 0) {
1779 disable_acpi();
1780 }
1781 /* acpi=force to over-ride black-list */
1782 else if (strcmp(arg, "force") == 0) {
1783 acpi_force = 1;
1784 acpi_ht = 1;
1785 acpi_disabled = 0;
1786 }
1787 /* acpi=strict disables out-of-spec workarounds */
1788 else if (strcmp(arg, "strict") == 0) {
1789 acpi_strict = 1;
1790 }
1791 /* Limit ACPI just to boot-time to enable HT */
1792 else if (strcmp(arg, "ht") == 0) {
1793 if (!acpi_force)
1794 disable_acpi();
1795 acpi_ht = 1;
1796 }
1797 /* acpi=rsdt use RSDT instead of XSDT */
1798 else if (strcmp(arg, "rsdt") == 0) {
1799 acpi_rsdt_forced = 1;
1800 }
1801 /* "acpi=noirq" disables ACPI interrupt routing */
1802 else if (strcmp(arg, "noirq") == 0) {
1803 acpi_noirq_set();
1804 } else {
1805 /* Core will printk when we return error. */
1806 return -EINVAL;
1807 }
1808 return 0;
1809 }
1810 early_param("acpi", parse_acpi);
1811
1812 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1813 static int __init parse_pci(char *arg)
1814 {
1815 if (arg && strcmp(arg, "noacpi") == 0)
1816 acpi_disable_pci();
1817 return 0;
1818 }
1819 early_param("pci", parse_pci);
1820
1821 int __init acpi_mps_check(void)
1822 {
1823 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1824 /* mptable code is not built-in*/
1825 if (acpi_disabled || acpi_noirq) {
1826 printk(KERN_WARNING "MPS support code is not built-in.\n"
1827 "Using acpi=off or acpi=noirq or pci=noacpi "
1828 "may have problem\n");
1829 return 1;
1830 }
1831 #endif
1832 return 0;
1833 }
1834
1835 #ifdef CONFIG_X86_IO_APIC
1836 static int __init parse_acpi_skip_timer_override(char *arg)
1837 {
1838 acpi_skip_timer_override = 1;
1839 return 0;
1840 }
1841 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1842
1843 static int __init parse_acpi_use_timer_override(char *arg)
1844 {
1845 acpi_use_timer_override = 1;
1846 return 0;
1847 }
1848 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1849 #endif /* CONFIG_X86_IO_APIC */
1850
1851 static int __init setup_acpi_sci(char *s)
1852 {
1853 if (!s)
1854 return -EINVAL;
1855 if (!strcmp(s, "edge"))
1856 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1857 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1858 else if (!strcmp(s, "level"))
1859 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1860 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1861 else if (!strcmp(s, "high"))
1862 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1863 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1864 else if (!strcmp(s, "low"))
1865 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1866 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1867 else
1868 return -EINVAL;
1869 return 0;
1870 }
1871 early_param("acpi_sci", setup_acpi_sci);
1872
1873 int __acpi_acquire_global_lock(unsigned int *lock)
1874 {
1875 unsigned int old, new, val;
1876 do {
1877 old = *lock;
1878 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1879 val = cmpxchg(lock, old, new);
1880 } while (unlikely (val != old));
1881 return (new < 3) ? -1 : 0;
1882 }
1883
1884 int __acpi_release_global_lock(unsigned int *lock)
1885 {
1886 unsigned int old, new, val;
1887 do {
1888 old = *lock;
1889 new = old & ~0x3;
1890 val = cmpxchg(lock, old, new);
1891 } while (unlikely (val != old));
1892 return old & 0x1;
1893 }
Support for the Chinese Samsung S3C2440 based development boards