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x86: use early_ioremap in __acpi_map_table
[linux-2.6/linux-2.6-openrd.git] / arch / x86 / kernel / acpi / boot.c
blobc518599e4264d4a6dfddf91a178401994e8e0038
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 static char *prev_map;
125 static unsigned long prev_size;
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 if (prev_map)
134 early_iounmap(prev_map, prev_size);
135
136 prev_size = size;
137 prev_map = early_ioremap(phys, size);
138
139 return prev_map;
140 }
141
142 #ifdef CONFIG_PCI_MMCONFIG
143
144 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
145
146 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
147 struct acpi_mcfg_allocation *pci_mmcfg_config;
148 int pci_mmcfg_config_num;
149
150 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
151 {
152 if (!strcmp(mcfg->header.oem_id, "SGI"))
153 acpi_mcfg_64bit_base_addr = TRUE;
154
155 return 0;
156 }
157
158 int __init acpi_parse_mcfg(struct acpi_table_header *header)
159 {
160 struct acpi_table_mcfg *mcfg;
161 unsigned long i;
162 int config_size;
163
164 if (!header)
165 return -EINVAL;
166
167 mcfg = (struct acpi_table_mcfg *)header;
168
169 /* how many config structures do we have */
170 pci_mmcfg_config_num = 0;
171 i = header->length - sizeof(struct acpi_table_mcfg);
172 while (i >= sizeof(struct acpi_mcfg_allocation)) {
173 ++pci_mmcfg_config_num;
174 i -= sizeof(struct acpi_mcfg_allocation);
175 };
176 if (pci_mmcfg_config_num == 0) {
177 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
178 return -ENODEV;
179 }
180
181 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
182 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
183 if (!pci_mmcfg_config) {
184 printk(KERN_WARNING PREFIX
185 "No memory for MCFG config tables\n");
186 return -ENOMEM;
187 }
188
189 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
190
191 acpi_mcfg_oem_check(mcfg);
192
193 for (i = 0; i < pci_mmcfg_config_num; ++i) {
194 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
195 !acpi_mcfg_64bit_base_addr) {
196 printk(KERN_ERR PREFIX
197 "MMCONFIG not in low 4GB of memory\n");
198 kfree(pci_mmcfg_config);
199 pci_mmcfg_config_num = 0;
200 return -ENODEV;
201 }
202 }
203
204 return 0;
205 }
206 #endif /* CONFIG_PCI_MMCONFIG */
207
208 #ifdef CONFIG_X86_LOCAL_APIC
209 static int __init acpi_parse_madt(struct acpi_table_header *table)
210 {
211 struct acpi_table_madt *madt = NULL;
212
213 if (!cpu_has_apic)
214 return -EINVAL;
215
216 madt = (struct acpi_table_madt *)table;
217 if (!madt) {
218 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
219 return -ENODEV;
220 }
221
222 if (madt->address) {
223 acpi_lapic_addr = (u64) madt->address;
224
225 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
226 madt->address);
227 }
228
229 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
230
231 return 0;
232 }
233
234 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
235 {
236 unsigned int ver = 0;
237
238 if (!enabled) {
239 ++disabled_cpus;
240 return;
241 }
242
243 if (boot_cpu_physical_apicid != -1U)
244 ver = apic_version[boot_cpu_physical_apicid];
245
246 generic_processor_info(id, ver);
247 }
248
249 static int __init
250 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
251 {
252 struct acpi_madt_local_apic *processor = NULL;
253
254 processor = (struct acpi_madt_local_apic *)header;
255
256 if (BAD_MADT_ENTRY(processor, end))
257 return -EINVAL;
258
259 acpi_table_print_madt_entry(header);
260
261 /*
262 * We need to register disabled CPU as well to permit
263 * counting disabled CPUs. This allows us to size
264 * cpus_possible_map more accurately, to permit
265 * to not preallocating memory for all NR_CPUS
266 * when we use CPU hotplug.
267 */
268 acpi_register_lapic(processor->id, /* APIC ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
270
271 return 0;
272 }
273
274 static int __init
275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
276 {
277 struct acpi_madt_local_sapic *processor = NULL;
278
279 processor = (struct acpi_madt_local_sapic *)header;
280
281 if (BAD_MADT_ENTRY(processor, end))
282 return -EINVAL;
283
284 acpi_table_print_madt_entry(header);
285
286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
287 processor->lapic_flags & ACPI_MADT_ENABLED);
288
289 return 0;
290 }
291
292 static int __init
293 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
294 const unsigned long end)
295 {
296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
297
298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
299
300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
301 return -EINVAL;
302
303 acpi_lapic_addr = lapic_addr_ovr->address;
304
305 return 0;
306 }
307
308 static int __init
309 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
310 {
311 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
312
313 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
314
315 if (BAD_MADT_ENTRY(lapic_nmi, end))
316 return -EINVAL;
317
318 acpi_table_print_madt_entry(header);
319
320 if (lapic_nmi->lint != 1)
321 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
322
323 return 0;
324 }
325
326 #endif /*CONFIG_X86_LOCAL_APIC */
327
328 #ifdef CONFIG_X86_IO_APIC
329
330 static int __init
331 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
332 {
333 struct acpi_madt_io_apic *ioapic = NULL;
334
335 ioapic = (struct acpi_madt_io_apic *)header;
336
337 if (BAD_MADT_ENTRY(ioapic, end))
338 return -EINVAL;
339
340 acpi_table_print_madt_entry(header);
341
342 mp_register_ioapic(ioapic->id,
343 ioapic->address, ioapic->global_irq_base);
344
345 return 0;
346 }
347
348 /*
349 * Parse Interrupt Source Override for the ACPI SCI
350 */
351 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
352 {
353 if (trigger == 0) /* compatible SCI trigger is level */
354 trigger = 3;
355
356 if (polarity == 0) /* compatible SCI polarity is low */
357 polarity = 3;
358
359 /* Command-line over-ride via acpi_sci= */
360 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
361 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
362
363 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
364 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
365
366 /*
367 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
368 * If GSI is < 16, this will update its flags,
369 * else it will create a new mp_irqs[] entry.
370 */
371 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
372
373 /*
374 * stash over-ride to indicate we've been here
375 * and for later update of acpi_gbl_FADT
376 */
377 acpi_sci_override_gsi = gsi;
378 return;
379 }
380
381 static int __init
382 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
383 const unsigned long end)
384 {
385 struct acpi_madt_interrupt_override *intsrc = NULL;
386
387 intsrc = (struct acpi_madt_interrupt_override *)header;
388
389 if (BAD_MADT_ENTRY(intsrc, end))
390 return -EINVAL;
391
392 acpi_table_print_madt_entry(header);
393
394 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
395 acpi_sci_ioapic_setup(intsrc->global_irq,
396 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
397 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
398 return 0;
399 }
400
401 if (acpi_skip_timer_override &&
402 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
403 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
404 return 0;
405 }
406
407 mp_override_legacy_irq(intsrc->source_irq,
408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
410 intsrc->global_irq);
411
412 return 0;
413 }
414
415 static int __init
416 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
417 {
418 struct acpi_madt_nmi_source *nmi_src = NULL;
419
420 nmi_src = (struct acpi_madt_nmi_source *)header;
421
422 if (BAD_MADT_ENTRY(nmi_src, end))
423 return -EINVAL;
424
425 acpi_table_print_madt_entry(header);
426
427 /* TBD: Support nimsrc entries? */
428
429 return 0;
430 }
431
432 #endif /* CONFIG_X86_IO_APIC */
433
434 /*
435 * acpi_pic_sci_set_trigger()
436 *
437 * use ELCR to set PIC-mode trigger type for SCI
438 *
439 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
440 * it may require Edge Trigger -- use "acpi_sci=edge"
441 *
442 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
443 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
444 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
445 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
446 */
447
448 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
449 {
450 unsigned int mask = 1 << irq;
451 unsigned int old, new;
452
453 /* Real old ELCR mask */
454 old = inb(0x4d0) | (inb(0x4d1) << 8);
455
456 /*
457 * If we use ACPI to set PCI IRQs, then we should clear ELCR
458 * since we will set it correctly as we enable the PCI irq
459 * routing.
460 */
461 new = acpi_noirq ? old : 0;
462
463 /*
464 * Update SCI information in the ELCR, it isn't in the PCI
465 * routing tables..
466 */
467 switch (trigger) {
468 case 1: /* Edge - clear */
469 new &= ~mask;
470 break;
471 case 3: /* Level - set */
472 new |= mask;
473 break;
474 }
475
476 if (old == new)
477 return;
478
479 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
480 outb(new, 0x4d0);
481 outb(new >> 8, 0x4d1);
482 }
483
484 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
485 {
486 *irq = gsi;
487 return 0;
488 }
489
490 /*
491 * success: return IRQ number (>=0)
492 * failure: return < 0
493 */
494 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
495 {
496 unsigned int irq;
497 unsigned int plat_gsi = gsi;
498
499 #ifdef CONFIG_PCI
500 /*
501 * Make sure all (legacy) PCI IRQs are set as level-triggered.
502 */
503 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
504 if (triggering == ACPI_LEVEL_SENSITIVE)
505 eisa_set_level_irq(gsi);
506 }
507 #endif
508
509 #ifdef CONFIG_X86_IO_APIC
510 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
511 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
512 }
513 #endif
514 acpi_gsi_to_irq(plat_gsi, &irq);
515 return irq;
516 }
517
518 /*
519 * ACPI based hotplug support for CPU
520 */
521 #ifdef CONFIG_ACPI_HOTPLUG_CPU
522
523 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
524 {
525 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
526 union acpi_object *obj;
527 struct acpi_madt_local_apic *lapic;
528 cpumask_var_t tmp_map, new_map;
529 u8 physid;
530 int cpu;
531 int retval = -ENOMEM;
532
533 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
534 return -EINVAL;
535
536 if (!buffer.length || !buffer.pointer)
537 return -EINVAL;
538
539 obj = buffer.pointer;
540 if (obj->type != ACPI_TYPE_BUFFER ||
541 obj->buffer.length < sizeof(*lapic)) {
542 kfree(buffer.pointer);
543 return -EINVAL;
544 }
545
546 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
547
548 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
549 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
550 kfree(buffer.pointer);
551 return -EINVAL;
552 }
553
554 physid = lapic->id;
555
556 kfree(buffer.pointer);
557 buffer.length = ACPI_ALLOCATE_BUFFER;
558 buffer.pointer = NULL;
559
560 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
561 goto out;
562
563 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
564 goto free_tmp_map;
565
566 cpumask_copy(tmp_map, cpu_present_mask);
567 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
568
569 /*
570 * If mp_register_lapic successfully generates a new logical cpu
571 * number, then the following will get us exactly what was mapped
572 */
573 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
574 if (cpumask_empty(new_map)) {
575 printk ("Unable to map lapic to logical cpu number\n");
576 retval = -EINVAL;
577 goto free_new_map;
578 }
579
580 cpu = cpumask_first(new_map);
581
582 *pcpu = cpu;
583 retval = 0;
584
585 free_new_map:
586 free_cpumask_var(new_map);
587 free_tmp_map:
588 free_cpumask_var(tmp_map);
589 out:
590 return retval;
591 }
592
593 /* wrapper to silence section mismatch warning */
594 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
595 {
596 return _acpi_map_lsapic(handle, pcpu);
597 }
598 EXPORT_SYMBOL(acpi_map_lsapic);
599
600 int acpi_unmap_lsapic(int cpu)
601 {
602 per_cpu(x86_cpu_to_apicid, cpu) = -1;
603 set_cpu_present(cpu, false);
604 num_processors--;
605
606 return (0);
607 }
608
609 EXPORT_SYMBOL(acpi_unmap_lsapic);
610 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
611
612 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
613 {
614 /* TBD */
615 return -EINVAL;
616 }
617
618 EXPORT_SYMBOL(acpi_register_ioapic);
619
620 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
621 {
622 /* TBD */
623 return -EINVAL;
624 }
625
626 EXPORT_SYMBOL(acpi_unregister_ioapic);
627
628 static int __init acpi_parse_sbf(struct acpi_table_header *table)
629 {
630 struct acpi_table_boot *sb;
631
632 sb = (struct acpi_table_boot *)table;
633 if (!sb) {
634 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
635 return -ENODEV;
636 }
637
638 sbf_port = sb->cmos_index; /* Save CMOS port */
639
640 return 0;
641 }
642
643 #ifdef CONFIG_HPET_TIMER
644 #include <asm/hpet.h>
645
646 static struct __initdata resource *hpet_res;
647
648 static int __init acpi_parse_hpet(struct acpi_table_header *table)
649 {
650 struct acpi_table_hpet *hpet_tbl;
651
652 hpet_tbl = (struct acpi_table_hpet *)table;
653 if (!hpet_tbl) {
654 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
655 return -ENODEV;
656 }
657
658 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
659 printk(KERN_WARNING PREFIX "HPET timers must be located in "
660 "memory.\n");
661 return -1;
662 }
663
664 hpet_address = hpet_tbl->address.address;
665
666 /*
667 * Some broken BIOSes advertise HPET at 0x0. We really do not
668 * want to allocate a resource there.
669 */
670 if (!hpet_address) {
671 printk(KERN_WARNING PREFIX
672 "HPET id: %#x base: %#lx is invalid\n",
673 hpet_tbl->id, hpet_address);
674 return 0;
675 }
676 #ifdef CONFIG_X86_64
677 /*
678 * Some even more broken BIOSes advertise HPET at
679 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
680 * some noise:
681 */
682 if (hpet_address == 0xfed0000000000000UL) {
683 if (!hpet_force_user) {
684 printk(KERN_WARNING PREFIX "HPET id: %#x "
685 "base: 0xfed0000000000000 is bogus\n "
686 "try hpet=force on the kernel command line to "
687 "fix it up to 0xfed00000.\n", hpet_tbl->id);
688 hpet_address = 0;
689 return 0;
690 }
691 printk(KERN_WARNING PREFIX
692 "HPET id: %#x base: 0xfed0000000000000 fixed up "
693 "to 0xfed00000.\n", hpet_tbl->id);
694 hpet_address >>= 32;
695 }
696 #endif
697 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
698 hpet_tbl->id, hpet_address);
699
700 /*
701 * Allocate and initialize the HPET firmware resource for adding into
702 * the resource tree during the lateinit timeframe.
703 */
704 #define HPET_RESOURCE_NAME_SIZE 9
705 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
706
707 hpet_res->name = (void *)&hpet_res[1];
708 hpet_res->flags = IORESOURCE_MEM;
709 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
710 hpet_tbl->sequence);
711
712 hpet_res->start = hpet_address;
713 hpet_res->end = hpet_address + (1 * 1024) - 1;
714
715 return 0;
716 }
717
718 /*
719 * hpet_insert_resource inserts the HPET resources used into the resource
720 * tree.
721 */
722 static __init int hpet_insert_resource(void)
723 {
724 if (!hpet_res)
725 return 1;
726
727 return insert_resource(&iomem_resource, hpet_res);
728 }
729
730 late_initcall(hpet_insert_resource);
731
732 #else
733 #define acpi_parse_hpet NULL
734 #endif
735
736 static int __init acpi_parse_fadt(struct acpi_table_header *table)
737 {
738
739 #ifdef CONFIG_X86_PM_TIMER
740 /* detect the location of the ACPI PM Timer */
741 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
742 /* FADT rev. 2 */
743 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
744 ACPI_ADR_SPACE_SYSTEM_IO)
745 return 0;
746
747 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
748 /*
749 * "X" fields are optional extensions to the original V1.0
750 * fields, so we must selectively expand V1.0 fields if the
751 * corresponding X field is zero.
752 */
753 if (!pmtmr_ioport)
754 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
755 } else {
756 /* FADT rev. 1 */
757 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
758 }
759 if (pmtmr_ioport)
760 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
761 pmtmr_ioport);
762 #endif
763 return 0;
764 }
765
766 #ifdef CONFIG_X86_LOCAL_APIC
767 /*
768 * Parse LAPIC entries in MADT
769 * returns 0 on success, < 0 on error
770 */
771
772 static void __init acpi_register_lapic_address(unsigned long address)
773 {
774 mp_lapic_addr = address;
775
776 set_fixmap_nocache(FIX_APIC_BASE, address);
777 if (boot_cpu_physical_apicid == -1U) {
778 boot_cpu_physical_apicid = read_apic_id();
779 apic_version[boot_cpu_physical_apicid] =
780 GET_APIC_VERSION(apic_read(APIC_LVR));
781 }
782 }
783
784 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
785 {
786 int count;
787
788 if (!cpu_has_apic)
789 return -ENODEV;
790
791 /*
792 * Note that the LAPIC address is obtained from the MADT (32-bit value)
793 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
794 */
795
796 count =
797 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
798 acpi_parse_lapic_addr_ovr, 0);
799 if (count < 0) {
800 printk(KERN_ERR PREFIX
801 "Error parsing LAPIC address override entry\n");
802 return count;
803 }
804
805 acpi_register_lapic_address(acpi_lapic_addr);
806
807 return count;
808 }
809
810 static int __init acpi_parse_madt_lapic_entries(void)
811 {
812 int count;
813
814 if (!cpu_has_apic)
815 return -ENODEV;
816
817 /*
818 * Note that the LAPIC address is obtained from the MADT (32-bit value)
819 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
820 */
821
822 count =
823 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
824 acpi_parse_lapic_addr_ovr, 0);
825 if (count < 0) {
826 printk(KERN_ERR PREFIX
827 "Error parsing LAPIC address override entry\n");
828 return count;
829 }
830
831 acpi_register_lapic_address(acpi_lapic_addr);
832
833 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
834 acpi_parse_sapic, MAX_APICS);
835
836 if (!count)
837 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
838 acpi_parse_lapic, MAX_APICS);
839 if (!count) {
840 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
841 /* TBD: Cleanup to allow fallback to MPS */
842 return -ENODEV;
843 } else if (count < 0) {
844 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
845 /* TBD: Cleanup to allow fallback to MPS */
846 return count;
847 }
848
849 count =
850 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
851 if (count < 0) {
852 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
853 /* TBD: Cleanup to allow fallback to MPS */
854 return count;
855 }
856 return 0;
857 }
858 #endif /* CONFIG_X86_LOCAL_APIC */
859
860 #ifdef CONFIG_X86_IO_APIC
861 #define MP_ISA_BUS 0
862
863 #ifdef CONFIG_X86_ES7000
864 extern int es7000_plat;
865 #endif
866
867 static struct {
868 int apic_id;
869 int gsi_base;
870 int gsi_end;
871 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
872 } mp_ioapic_routing[MAX_IO_APICS];
873
874 static int mp_find_ioapic(int gsi)
875 {
876 int i = 0;
877
878 /* Find the IOAPIC that manages this GSI. */
879 for (i = 0; i < nr_ioapics; i++) {
880 if ((gsi >= mp_ioapic_routing[i].gsi_base)
881 && (gsi <= mp_ioapic_routing[i].gsi_end))
882 return i;
883 }
884
885 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
886 return -1;
887 }
888
889 static u8 __init uniq_ioapic_id(u8 id)
890 {
891 #ifdef CONFIG_X86_32
892 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
893 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
894 return io_apic_get_unique_id(nr_ioapics, id);
895 else
896 return id;
897 #else
898 int i;
899 DECLARE_BITMAP(used, 256);
900 bitmap_zero(used, 256);
901 for (i = 0; i < nr_ioapics; i++) {
902 struct mp_config_ioapic *ia = &mp_ioapics[i];
903 __set_bit(ia->mp_apicid, used);
904 }
905 if (!test_bit(id, used))
906 return id;
907 return find_first_zero_bit(used, 256);
908 #endif
909 }
910
911 static int bad_ioapic(unsigned long address)
912 {
913 if (nr_ioapics >= MAX_IO_APICS) {
914 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
915 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
916 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
917 }
918 if (!address) {
919 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
920 " found in table, skipping!\n");
921 return 1;
922 }
923 return 0;
924 }
925
926 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
927 {
928 int idx = 0;
929
930 if (bad_ioapic(address))
931 return;
932
933 idx = nr_ioapics;
934
935 mp_ioapics[idx].mp_type = MP_IOAPIC;
936 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
937 mp_ioapics[idx].mp_apicaddr = address;
938
939 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
940 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
941 #ifdef CONFIG_X86_32
942 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
943 #else
944 mp_ioapics[idx].mp_apicver = 0;
945 #endif
946 /*
947 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
948 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
949 */
950 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
951 mp_ioapic_routing[idx].gsi_base = gsi_base;
952 mp_ioapic_routing[idx].gsi_end = gsi_base +
953 io_apic_get_redir_entries(idx);
954
955 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
956 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
957 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
958 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
959
960 nr_ioapics++;
961 }
962
963 static void assign_to_mp_irq(struct mp_config_intsrc *m,
964 struct mp_config_intsrc *mp_irq)
965 {
966 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
967 }
968
969 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
970 struct mp_config_intsrc *m)
971 {
972 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
973 }
974
975 static void save_mp_irq(struct mp_config_intsrc *m)
976 {
977 int i;
978
979 for (i = 0; i < mp_irq_entries; i++) {
980 if (!mp_irq_cmp(&mp_irqs[i], m))
981 return;
982 }
983
984 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
985 if (++mp_irq_entries == MAX_IRQ_SOURCES)
986 panic("Max # of irq sources exceeded!!\n");
987 }
988
989 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
990 {
991 int ioapic;
992 int pin;
993 struct mp_config_intsrc mp_irq;
994
995 /*
996 * Convert 'gsi' to 'ioapic.pin'.
997 */
998 ioapic = mp_find_ioapic(gsi);
999 if (ioapic < 0)
1000 return;
1001 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1002
1003 /*
1004 * TBD: This check is for faulty timer entries, where the override
1005 * erroneously sets the trigger to level, resulting in a HUGE
1006 * increase of timer interrupts!
1007 */
1008 if ((bus_irq == 0) && (trigger == 3))
1009 trigger = 1;
1010
1011 mp_irq.mp_type = MP_INTSRC;
1012 mp_irq.mp_irqtype = mp_INT;
1013 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1014 mp_irq.mp_srcbus = MP_ISA_BUS;
1015 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1016 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1017 mp_irq.mp_dstirq = pin; /* INTIN# */
1018
1019 save_mp_irq(&mp_irq);
1020 }
1021
1022 void __init mp_config_acpi_legacy_irqs(void)
1023 {
1024 int i;
1025 int ioapic;
1026 unsigned int dstapic;
1027 struct mp_config_intsrc mp_irq;
1028
1029 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1030 /*
1031 * Fabricate the legacy ISA bus (bus #31).
1032 */
1033 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1034 #endif
1035 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1036 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1037
1038 #ifdef CONFIG_X86_ES7000
1039 /*
1040 * Older generations of ES7000 have no legacy identity mappings
1041 */
1042 if (es7000_plat == 1)
1043 return;
1044 #endif
1045
1046 /*
1047 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1048 */
1049 ioapic = mp_find_ioapic(0);
1050 if (ioapic < 0)
1051 return;
1052 dstapic = mp_ioapics[ioapic].mp_apicid;
1053
1054 /*
1055 * Use the default configuration for the IRQs 0-15. Unless
1056 * overridden by (MADT) interrupt source override entries.
1057 */
1058 for (i = 0; i < 16; i++) {
1059 int idx;
1060
1061 for (idx = 0; idx < mp_irq_entries; idx++) {
1062 struct mp_config_intsrc *irq = mp_irqs + idx;
1063
1064 /* Do we already have a mapping for this ISA IRQ? */
1065 if (irq->mp_srcbus == MP_ISA_BUS
1066 && irq->mp_srcbusirq == i)
1067 break;
1068
1069 /* Do we already have a mapping for this IOAPIC pin */
1070 if (irq->mp_dstapic == dstapic &&
1071 irq->mp_dstirq == i)
1072 break;
1073 }
1074
1075 if (idx != mp_irq_entries) {
1076 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1077 continue; /* IRQ already used */
1078 }
1079
1080 mp_irq.mp_type = MP_INTSRC;
1081 mp_irq.mp_irqflag = 0; /* Conforming */
1082 mp_irq.mp_srcbus = MP_ISA_BUS;
1083 mp_irq.mp_dstapic = dstapic;
1084 mp_irq.mp_irqtype = mp_INT;
1085 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1086 mp_irq.mp_dstirq = i;
1087
1088 save_mp_irq(&mp_irq);
1089 }
1090 }
1091
1092 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1093 {
1094 int ioapic;
1095 int ioapic_pin;
1096 #ifdef CONFIG_X86_32
1097 #define MAX_GSI_NUM 4096
1098 #define IRQ_COMPRESSION_START 64
1099
1100 static int pci_irq = IRQ_COMPRESSION_START;
1101 /*
1102 * Mapping between Global System Interrupts, which
1103 * represent all possible interrupts, and IRQs
1104 * assigned to actual devices.
1105 */
1106 static int gsi_to_irq[MAX_GSI_NUM];
1107 #else
1108
1109 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1110 return gsi;
1111 #endif
1112
1113 /* Don't set up the ACPI SCI because it's already set up */
1114 if (acpi_gbl_FADT.sci_interrupt == gsi)
1115 return gsi;
1116
1117 ioapic = mp_find_ioapic(gsi);
1118 if (ioapic < 0) {
1119 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1120 return gsi;
1121 }
1122
1123 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1124
1125 #ifdef CONFIG_X86_32
1126 if (ioapic_renumber_irq)
1127 gsi = ioapic_renumber_irq(ioapic, gsi);
1128 #endif
1129
1130 /*
1131 * Avoid pin reprogramming. PRTs typically include entries
1132 * with redundant pin->gsi mappings (but unique PCI devices);
1133 * we only program the IOAPIC on the first.
1134 */
1135 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1136 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1137 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1138 ioapic_pin);
1139 return gsi;
1140 }
1141 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1142 pr_debug("Pin %d-%d already programmed\n",
1143 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1144 #ifdef CONFIG_X86_32
1145 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1146 #else
1147 return gsi;
1148 #endif
1149 }
1150
1151 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1152 #ifdef CONFIG_X86_32
1153 /*
1154 * For GSI >= 64, use IRQ compression
1155 */
1156 if ((gsi >= IRQ_COMPRESSION_START)
1157 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1158 /*
1159 * For PCI devices assign IRQs in order, avoiding gaps
1160 * due to unused I/O APIC pins.
1161 */
1162 int irq = gsi;
1163 if (gsi < MAX_GSI_NUM) {
1164 /*
1165 * Retain the VIA chipset work-around (gsi > 15), but
1166 * avoid a problem where the 8254 timer (IRQ0) is setup
1167 * via an override (so it's not on pin 0 of the ioapic),
1168 * and at the same time, the pin 0 interrupt is a PCI
1169 * type. The gsi > 15 test could cause these two pins
1170 * to be shared as IRQ0, and they are not shareable.
1171 * So test for this condition, and if necessary, avoid
1172 * the pin collision.
1173 */
1174 gsi = pci_irq++;
1175 /*
1176 * Don't assign IRQ used by ACPI SCI
1177 */
1178 if (gsi == acpi_gbl_FADT.sci_interrupt)
1179 gsi = pci_irq++;
1180 gsi_to_irq[irq] = gsi;
1181 } else {
1182 printk(KERN_ERR "GSI %u is too high\n", gsi);
1183 return gsi;
1184 }
1185 }
1186 #endif
1187 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1188 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1189 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1190 return gsi;
1191 }
1192
1193 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1194 u32 gsi, int triggering, int polarity)
1195 {
1196 #ifdef CONFIG_X86_MPPARSE
1197 struct mp_config_intsrc mp_irq;
1198 int ioapic;
1199
1200 if (!acpi_ioapic)
1201 return 0;
1202
1203 /* print the entry should happen on mptable identically */
1204 mp_irq.mp_type = MP_INTSRC;
1205 mp_irq.mp_irqtype = mp_INT;
1206 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1207 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1208 mp_irq.mp_srcbus = number;
1209 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1210 ioapic = mp_find_ioapic(gsi);
1211 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1212 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1213
1214 save_mp_irq(&mp_irq);
1215 #endif
1216 return 0;
1217 }
1218
1219 /*
1220 * Parse IOAPIC related entries in MADT
1221 * returns 0 on success, < 0 on error
1222 */
1223 static int __init acpi_parse_madt_ioapic_entries(void)
1224 {
1225 int count;
1226
1227 /*
1228 * ACPI interpreter is required to complete interrupt setup,
1229 * so if it is off, don't enumerate the io-apics with ACPI.
1230 * If MPS is present, it will handle them,
1231 * otherwise the system will stay in PIC mode
1232 */
1233 if (acpi_disabled || acpi_noirq) {
1234 return -ENODEV;
1235 }
1236
1237 if (!cpu_has_apic)
1238 return -ENODEV;
1239
1240 /*
1241 * if "noapic" boot option, don't look for IO-APICs
1242 */
1243 if (skip_ioapic_setup) {
1244 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1245 "due to 'noapic' option.\n");
1246 return -ENODEV;
1247 }
1248
1249 count =
1250 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1251 MAX_IO_APICS);
1252 if (!count) {
1253 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1254 return -ENODEV;
1255 } else if (count < 0) {
1256 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1257 return count;
1258 }
1259
1260 count =
1261 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1262 nr_irqs);
1263 if (count < 0) {
1264 printk(KERN_ERR PREFIX
1265 "Error parsing interrupt source overrides entry\n");
1266 /* TBD: Cleanup to allow fallback to MPS */
1267 return count;
1268 }
1269
1270 /*
1271 * If BIOS did not supply an INT_SRC_OVR for the SCI
1272 * pretend we got one so we can set the SCI flags.
1273 */
1274 if (!acpi_sci_override_gsi)
1275 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1276
1277 /* Fill in identity legacy mapings where no override */
1278 mp_config_acpi_legacy_irqs();
1279
1280 count =
1281 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1282 nr_irqs);
1283 if (count < 0) {
1284 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1285 /* TBD: Cleanup to allow fallback to MPS */
1286 return count;
1287 }
1288
1289 return 0;
1290 }
1291 #else
1292 static inline int acpi_parse_madt_ioapic_entries(void)
1293 {
1294 return -1;
1295 }
1296 #endif /* !CONFIG_X86_IO_APIC */
1297
1298 static void __init early_acpi_process_madt(void)
1299 {
1300 #ifdef CONFIG_X86_LOCAL_APIC
1301 int error;
1302
1303 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1304
1305 /*
1306 * Parse MADT LAPIC entries
1307 */
1308 error = early_acpi_parse_madt_lapic_addr_ovr();
1309 if (!error) {
1310 acpi_lapic = 1;
1311 smp_found_config = 1;
1312 }
1313 if (error == -EINVAL) {
1314 /*
1315 * Dell Precision Workstation 410, 610 come here.
1316 */
1317 printk(KERN_ERR PREFIX
1318 "Invalid BIOS MADT, disabling ACPI\n");
1319 disable_acpi();
1320 }
1321 }
1322 #endif
1323 }
1324
1325 static void __init acpi_process_madt(void)
1326 {
1327 #ifdef CONFIG_X86_LOCAL_APIC
1328 int error;
1329
1330 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1331
1332 /*
1333 * Parse MADT LAPIC entries
1334 */
1335 error = acpi_parse_madt_lapic_entries();
1336 if (!error) {
1337 acpi_lapic = 1;
1338
1339 #ifdef CONFIG_X86_GENERICARCH
1340 generic_bigsmp_probe();
1341 #endif
1342 /*
1343 * Parse MADT IO-APIC entries
1344 */
1345 error = acpi_parse_madt_ioapic_entries();
1346 if (!error) {
1347 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1348 acpi_ioapic = 1;
1349
1350 smp_found_config = 1;
1351 #ifdef CONFIG_X86_32
1352 setup_apic_routing();
1353 #endif
1354 }
1355 }
1356 if (error == -EINVAL) {
1357 /*
1358 * Dell Precision Workstation 410, 610 come here.
1359 */
1360 printk(KERN_ERR PREFIX
1361 "Invalid BIOS MADT, disabling ACPI\n");
1362 disable_acpi();
1363 }
1364 } else {
1365 /*
1366 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1367 * In the event an MPS table was found, forget it.
1368 * Boot with "acpi=off" to use MPS on such a system.
1369 */
1370 if (smp_found_config) {
1371 printk(KERN_WARNING PREFIX
1372 "No APIC-table, disabling MPS\n");
1373 smp_found_config = 0;
1374 }
1375 }
1376
1377 /*
1378 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1379 * processors, where MPS only supports physical.
1380 */
1381 if (acpi_lapic && acpi_ioapic)
1382 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1383 "information\n");
1384 else if (acpi_lapic)
1385 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1386 "configuration information\n");
1387 #endif
1388 return;
1389 }
1390
1391 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1392 {
1393 if (!acpi_force) {
1394 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1395 d->ident);
1396 acpi_noirq_set();
1397 }
1398 return 0;
1399 }
1400
1401 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1402 {
1403 if (!acpi_force) {
1404 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1405 d->ident);
1406 acpi_disable_pci();
1407 }
1408 return 0;
1409 }
1410
1411 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1412 {
1413 if (!acpi_force) {
1414 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1415 disable_acpi();
1416 } else {
1417 printk(KERN_NOTICE
1418 "Warning: DMI blacklist says broken, but acpi forced\n");
1419 }
1420 return 0;
1421 }
1422
1423 /*
1424 * Limit ACPI to CPU enumeration for HT
1425 */
1426 static int __init force_acpi_ht(const struct dmi_system_id *d)
1427 {
1428 if (!acpi_force) {
1429 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1430 d->ident);
1431 disable_acpi();
1432 acpi_ht = 1;
1433 } else {
1434 printk(KERN_NOTICE
1435 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1436 }
1437 return 0;
1438 }
1439
1440 /*
1441 * Force ignoring BIOS IRQ0 pin2 override
1442 */
1443 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1444 {
1445 /*
1446 * The ati_ixp4x0_rev() early PCI quirk should have set
1447 * the acpi_skip_timer_override flag already:
1448 */
1449 if (!acpi_skip_timer_override) {
1450 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1451 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1452 d->ident);
1453 acpi_skip_timer_override = 1;
1454 }
1455 return 0;
1456 }
1457
1458 /*
1459 * If your system is blacklisted here, but you find that acpi=force
1460 * works for you, please contact acpi-devel@sourceforge.net
1461 */
1462 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1463 /*
1464 * Boxes that need ACPI disabled
1465 */
1466 {
1467 .callback = dmi_disable_acpi,
1468 .ident = "IBM Thinkpad",
1469 .matches = {
1470 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1471 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1472 },
1473 },
1474
1475 /*
1476 * Boxes that need acpi=ht
1477 */
1478 {
1479 .callback = force_acpi_ht,
1480 .ident = "FSC Primergy T850",
1481 .matches = {
1482 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1484 },
1485 },
1486 {
1487 .callback = force_acpi_ht,
1488 .ident = "HP VISUALIZE NT Workstation",
1489 .matches = {
1490 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1492 },
1493 },
1494 {
1495 .callback = force_acpi_ht,
1496 .ident = "Compaq Workstation W8000",
1497 .matches = {
1498 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1499 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1500 },
1501 },
1502 {
1503 .callback = force_acpi_ht,
1504 .ident = "ASUS P4B266",
1505 .matches = {
1506 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1507 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1508 },
1509 },
1510 {
1511 .callback = force_acpi_ht,
1512 .ident = "ASUS P2B-DS",
1513 .matches = {
1514 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1515 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1516 },
1517 },
1518 {
1519 .callback = force_acpi_ht,
1520 .ident = "ASUS CUR-DLS",
1521 .matches = {
1522 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1523 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1524 },
1525 },
1526 {
1527 .callback = force_acpi_ht,
1528 .ident = "ABIT i440BX-W83977",
1529 .matches = {
1530 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1531 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1532 },
1533 },
1534 {
1535 .callback = force_acpi_ht,
1536 .ident = "IBM Bladecenter",
1537 .matches = {
1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1539 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1540 },
1541 },
1542 {
1543 .callback = force_acpi_ht,
1544 .ident = "IBM eServer xSeries 360",
1545 .matches = {
1546 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1547 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1548 },
1549 },
1550 {
1551 .callback = force_acpi_ht,
1552 .ident = "IBM eserver xSeries 330",
1553 .matches = {
1554 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1555 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1556 },
1557 },
1558 {
1559 .callback = force_acpi_ht,
1560 .ident = "IBM eserver xSeries 440",
1561 .matches = {
1562 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1563 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1564 },
1565 },
1566
1567 /*
1568 * Boxes that need ACPI PCI IRQ routing disabled
1569 */
1570 {
1571 .callback = disable_acpi_irq,
1572 .ident = "ASUS A7V",
1573 .matches = {
1574 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1575 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1576 /* newer BIOS, Revision 1011, does work */
1577 DMI_MATCH(DMI_BIOS_VERSION,
1578 "ASUS A7V ACPI BIOS Revision 1007"),
1579 },
1580 },
1581 {
1582 /*
1583 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1584 * for LPC bridge, which is needed for the PCI
1585 * interrupt links to work. DSDT fix is in bug 5966.
1586 * 2645, 2646 model numbers are shared with 600/600E/600X
1587 */
1588 .callback = disable_acpi_irq,
1589 .ident = "IBM Thinkpad 600 Series 2645",
1590 .matches = {
1591 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1592 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1593 },
1594 },
1595 {
1596 .callback = disable_acpi_irq,
1597 .ident = "IBM Thinkpad 600 Series 2646",
1598 .matches = {
1599 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1600 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1601 },
1602 },
1603 /*
1604 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1605 */
1606 { /* _BBN 0 bug */
1607 .callback = disable_acpi_pci,
1608 .ident = "ASUS PR-DLS",
1609 .matches = {
1610 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1611 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1612 DMI_MATCH(DMI_BIOS_VERSION,
1613 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1614 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1615 },
1616 },
1617 {
1618 .callback = disable_acpi_pci,
1619 .ident = "Acer TravelMate 36x Laptop",
1620 .matches = {
1621 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1622 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1623 },
1624 },
1625 {}
1626 };
1627
1628 /* second table for DMI checks that should run after early-quirks */
1629 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1630 /*
1631 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1632 * which includes some code which overrides all temperature
1633 * trip points to 16C if the INTIN2 input of the I/O APIC
1634 * is enabled. This input is incorrectly designated the
1635 * ISA IRQ 0 via an interrupt source override even though
1636 * it is wired to the output of the master 8259A and INTIN0
1637 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1638 * override in that cases.
1639 */
1640 {
1641 .callback = dmi_ignore_irq0_timer_override,
1642 .ident = "HP nx6115 laptop",
1643 .matches = {
1644 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1645 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1646 },
1647 },
1648 {
1649 .callback = dmi_ignore_irq0_timer_override,
1650 .ident = "HP NX6125 laptop",
1651 .matches = {
1652 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1653 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1654 },
1655 },
1656 {
1657 .callback = dmi_ignore_irq0_timer_override,
1658 .ident = "HP NX6325 laptop",
1659 .matches = {
1660 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1661 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1662 },
1663 },
1664 {
1665 .callback = dmi_ignore_irq0_timer_override,
1666 .ident = "HP 6715b laptop",
1667 .matches = {
1668 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1669 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1670 },
1671 },
1672 {}
1673 };
1674
1675 /*
1676 * acpi_boot_table_init() and acpi_boot_init()
1677 * called from setup_arch(), always.
1678 * 1. checksums all tables
1679 * 2. enumerates lapics
1680 * 3. enumerates io-apics
1681 *
1682 * acpi_table_init() is separate to allow reading SRAT without
1683 * other side effects.
1684 *
1685 * side effects of acpi_boot_init:
1686 * acpi_lapic = 1 if LAPIC found
1687 * acpi_ioapic = 1 if IOAPIC found
1688 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1689 * if acpi_blacklisted() acpi_disabled = 1;
1690 * acpi_irq_model=...
1691 * ...
1692 *
1693 * return value: (currently ignored)
1694 * 0: success
1695 * !0: failure
1696 */
1697
1698 int __init acpi_boot_table_init(void)
1699 {
1700 int error;
1701
1702 dmi_check_system(acpi_dmi_table);
1703
1704 /*
1705 * If acpi_disabled, bail out
1706 * One exception: acpi=ht continues far enough to enumerate LAPICs
1707 */
1708 if (acpi_disabled && !acpi_ht)
1709 return 1;
1710
1711 /*
1712 * Initialize the ACPI boot-time table parser.
1713 */
1714 error = acpi_table_init();
1715 if (error) {
1716 disable_acpi();
1717 return error;
1718 }
1719
1720 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1721
1722 /*
1723 * blacklist may disable ACPI entirely
1724 */
1725 error = acpi_blacklisted();
1726 if (error) {
1727 if (acpi_force) {
1728 printk(KERN_WARNING PREFIX "acpi=force override\n");
1729 } else {
1730 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1731 disable_acpi();
1732 return error;
1733 }
1734 }
1735
1736 return 0;
1737 }
1738
1739 int __init early_acpi_boot_init(void)
1740 {
1741 /*
1742 * If acpi_disabled, bail out
1743 * One exception: acpi=ht continues far enough to enumerate LAPICs
1744 */
1745 if (acpi_disabled && !acpi_ht)
1746 return 1;
1747
1748 /*
1749 * Process the Multiple APIC Description Table (MADT), if present
1750 */
1751 early_acpi_process_madt();
1752
1753 return 0;
1754 }
1755
1756 int __init acpi_boot_init(void)
1757 {
1758 /* those are executed after early-quirks are executed */
1759 dmi_check_system(acpi_dmi_table_late);
1760
1761 /*
1762 * If acpi_disabled, bail out
1763 * One exception: acpi=ht continues far enough to enumerate LAPICs
1764 */
1765 if (acpi_disabled && !acpi_ht)
1766 return 1;
1767
1768 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1769
1770 /*
1771 * set sci_int and PM timer address
1772 */
1773 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1774
1775 /*
1776 * Process the Multiple APIC Description Table (MADT), if present
1777 */
1778 acpi_process_madt();
1779
1780 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1781
1782 return 0;
1783 }
1784
1785 static int __init parse_acpi(char *arg)
1786 {
1787 if (!arg)
1788 return -EINVAL;
1789
1790 /* "acpi=off" disables both ACPI table parsing and interpreter */
1791 if (strcmp(arg, "off") == 0) {
1792 disable_acpi();
1793 }
1794 /* acpi=force to over-ride black-list */
1795 else if (strcmp(arg, "force") == 0) {
1796 acpi_force = 1;
1797 acpi_ht = 1;
1798 acpi_disabled = 0;
1799 }
1800 /* acpi=strict disables out-of-spec workarounds */
1801 else if (strcmp(arg, "strict") == 0) {
1802 acpi_strict = 1;
1803 }
1804 /* Limit ACPI just to boot-time to enable HT */
1805 else if (strcmp(arg, "ht") == 0) {
1806 if (!acpi_force)
1807 disable_acpi();
1808 acpi_ht = 1;
1809 }
1810 /* acpi=rsdt use RSDT instead of XSDT */
1811 else if (strcmp(arg, "rsdt") == 0) {
1812 acpi_rsdt_forced = 1;
1813 }
1814 /* "acpi=noirq" disables ACPI interrupt routing */
1815 else if (strcmp(arg, "noirq") == 0) {
1816 acpi_noirq_set();
1817 } else {
1818 /* Core will printk when we return error. */
1819 return -EINVAL;
1820 }
1821 return 0;
1822 }
1823 early_param("acpi", parse_acpi);
1824
1825 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1826 static int __init parse_pci(char *arg)
1827 {
1828 if (arg && strcmp(arg, "noacpi") == 0)
1829 acpi_disable_pci();
1830 return 0;
1831 }
1832 early_param("pci", parse_pci);
1833
1834 int __init acpi_mps_check(void)
1835 {
1836 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1837 /* mptable code is not built-in*/
1838 if (acpi_disabled || acpi_noirq) {
1839 printk(KERN_WARNING "MPS support code is not built-in.\n"
1840 "Using acpi=off or acpi=noirq or pci=noacpi "
1841 "may have problem\n");
1842 return 1;
1843 }
1844 #endif
1845 return 0;
1846 }
1847
1848 #ifdef CONFIG_X86_IO_APIC
1849 static int __init parse_acpi_skip_timer_override(char *arg)
1850 {
1851 acpi_skip_timer_override = 1;
1852 return 0;
1853 }
1854 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1855
1856 static int __init parse_acpi_use_timer_override(char *arg)
1857 {
1858 acpi_use_timer_override = 1;
1859 return 0;
1860 }
1861 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1862 #endif /* CONFIG_X86_IO_APIC */
1863
1864 static int __init setup_acpi_sci(char *s)
1865 {
1866 if (!s)
1867 return -EINVAL;
1868 if (!strcmp(s, "edge"))
1869 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1870 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1871 else if (!strcmp(s, "level"))
1872 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1873 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1874 else if (!strcmp(s, "high"))
1875 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1876 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1877 else if (!strcmp(s, "low"))
1878 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1879 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1880 else
1881 return -EINVAL;
1882 return 0;
1883 }
1884 early_param("acpi_sci", setup_acpi_sci);
1885
1886 int __acpi_acquire_global_lock(unsigned int *lock)
1887 {
1888 unsigned int old, new, val;
1889 do {
1890 old = *lock;
1891 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1892 val = cmpxchg(lock, old, new);
1893 } while (unlikely (val != old));
1894 return (new < 3) ? -1 : 0;
1895 }
1896
1897 int __acpi_release_global_lock(unsigned int *lock)
1898 {
1899 unsigned int old, new, val;
1900 do {
1901 old = *lock;
1902 new = old & ~0x3;
1903 val = cmpxchg(lock, old, new);
1904 } while (unlikely (val != old));
1905 return old & 0x1;
1906 }
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