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x86: I/O APIC: remove an IRQ2-mask hack
[linux-2.6/mini2440.git] / arch / x86 / kernel / acpi / boot.c
blobf489d7a9be92ffd00c662c4b18554637e4311406
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
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 #include <asm/genapic.h>
62
63 #else /* X86 */
64
65 #ifdef CONFIG_X86_LOCAL_APIC
66 #include <mach_apic.h>
67 #include <mach_mpparse.h>
68 #endif /* CONFIG_X86_LOCAL_APIC */
69
70 #endif /* X86 */
71
72 #define BAD_MADT_ENTRY(entry, end) ( \
73 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
74 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
75
76 #define PREFIX "ACPI: "
77
78 int acpi_noirq; /* skip ACPI IRQ initialization */
79 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
80 EXPORT_SYMBOL(acpi_pci_disabled);
81 int acpi_ht __initdata = 1; /* enable HT */
82
83 int acpi_lapic;
84 int acpi_ioapic;
85 int acpi_strict;
86
87 u8 acpi_sci_flags __initdata;
88 int acpi_sci_override_gsi __initdata;
89 int acpi_skip_timer_override __initdata;
90 int acpi_use_timer_override __initdata;
91
92 #ifdef CONFIG_X86_LOCAL_APIC
93 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
94 #endif
95
96 #ifndef __HAVE_ARCH_CMPXCHG
97 #warning ACPI uses CMPXCHG, i486 and later hardware
98 #endif
99
100 /* --------------------------------------------------------------------------
101 Boot-time Configuration
102 -------------------------------------------------------------------------- */
103
104 /*
105 * The default interrupt routing model is PIC (8259). This gets
106 * overridden if IOAPICs are enumerated (below).
107 */
108 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
109
110
111 /*
112 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
113 * to map the target physical address. The problem is that set_fixmap()
114 * provides a single page, and it is possible that the page is not
115 * sufficient.
116 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
117 * i.e. until the next __va_range() call.
118 *
119 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
120 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
121 * count idx down while incrementing the phys address.
122 */
123 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
124 {
125 unsigned long base, offset, mapped_size;
126 int idx;
127
128 if (!phys || !size)
129 return NULL;
130
131 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
132 return __va(phys);
133
134 offset = phys & (PAGE_SIZE - 1);
135 mapped_size = PAGE_SIZE - offset;
136 clear_fixmap(FIX_ACPI_END);
137 set_fixmap(FIX_ACPI_END, phys);
138 base = fix_to_virt(FIX_ACPI_END);
139
140 /*
141 * Most cases can be covered by the below.
142 */
143 idx = FIX_ACPI_END;
144 while (mapped_size < size) {
145 if (--idx < FIX_ACPI_BEGIN)
146 return NULL; /* cannot handle this */
147 phys += PAGE_SIZE;
148 clear_fixmap(idx);
149 set_fixmap(idx, phys);
150 mapped_size += PAGE_SIZE;
151 }
152
153 return ((unsigned char *)base + offset);
154 }
155
156 #ifdef CONFIG_PCI_MMCONFIG
157 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
158 struct acpi_mcfg_allocation *pci_mmcfg_config;
159 int pci_mmcfg_config_num;
160
161 int __init acpi_parse_mcfg(struct acpi_table_header *header)
162 {
163 struct acpi_table_mcfg *mcfg;
164 unsigned long i;
165 int config_size;
166
167 if (!header)
168 return -EINVAL;
169
170 mcfg = (struct acpi_table_mcfg *)header;
171
172 /* how many config structures do we have */
173 pci_mmcfg_config_num = 0;
174 i = header->length - sizeof(struct acpi_table_mcfg);
175 while (i >= sizeof(struct acpi_mcfg_allocation)) {
176 ++pci_mmcfg_config_num;
177 i -= sizeof(struct acpi_mcfg_allocation);
178 };
179 if (pci_mmcfg_config_num == 0) {
180 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
181 return -ENODEV;
182 }
183
184 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
185 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
186 if (!pci_mmcfg_config) {
187 printk(KERN_WARNING PREFIX
188 "No memory for MCFG config tables\n");
189 return -ENOMEM;
190 }
191
192 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
193 for (i = 0; i < pci_mmcfg_config_num; ++i) {
194 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
195 printk(KERN_ERR PREFIX
196 "MMCONFIG not in low 4GB of memory\n");
197 kfree(pci_mmcfg_config);
198 pci_mmcfg_config_num = 0;
199 return -ENODEV;
200 }
201 }
202
203 return 0;
204 }
205 #endif /* CONFIG_PCI_MMCONFIG */
206
207 #ifdef CONFIG_X86_LOCAL_APIC
208 static int __init acpi_parse_madt(struct acpi_table_header *table)
209 {
210 struct acpi_table_madt *madt = NULL;
211
212 if (!cpu_has_apic)
213 return -EINVAL;
214
215 madt = (struct acpi_table_madt *)table;
216 if (!madt) {
217 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
218 return -ENODEV;
219 }
220
221 if (madt->address) {
222 acpi_lapic_addr = (u64) madt->address;
223
224 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
225 madt->address);
226 }
227
228 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
229
230 return 0;
231 }
232
233 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
234 {
235 unsigned int ver = 0;
236
237 if (!enabled) {
238 ++disabled_cpus;
239 return;
240 }
241
242 #ifdef CONFIG_X86_32
243 if (boot_cpu_physical_apicid != -1U)
244 ver = apic_version[boot_cpu_physical_apicid];
245 #endif
246
247 generic_processor_info(id, ver);
248 }
249
250 static int __init
251 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
252 {
253 struct acpi_madt_local_apic *processor = NULL;
254
255 processor = (struct acpi_madt_local_apic *)header;
256
257 if (BAD_MADT_ENTRY(processor, end))
258 return -EINVAL;
259
260 acpi_table_print_madt_entry(header);
261
262 /*
263 * We need to register disabled CPU as well to permit
264 * counting disabled CPUs. This allows us to size
265 * cpus_possible_map more accurately, to permit
266 * to not preallocating memory for all NR_CPUS
267 * when we use CPU hotplug.
268 */
269 acpi_register_lapic(processor->id, /* APIC ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273 }
274
275 static int __init
276 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
277 {
278 struct acpi_madt_local_sapic *processor = NULL;
279
280 processor = (struct acpi_madt_local_sapic *)header;
281
282 if (BAD_MADT_ENTRY(processor, end))
283 return -EINVAL;
284
285 acpi_table_print_madt_entry(header);
286
287 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
288 processor->lapic_flags & ACPI_MADT_ENABLED);
289
290 return 0;
291 }
292
293 static int __init
294 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
295 const unsigned long end)
296 {
297 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298
299 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300
301 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
302 return -EINVAL;
303
304 acpi_lapic_addr = lapic_addr_ovr->address;
305
306 return 0;
307 }
308
309 static int __init
310 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
311 {
312 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
313
314 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
315
316 if (BAD_MADT_ENTRY(lapic_nmi, end))
317 return -EINVAL;
318
319 acpi_table_print_madt_entry(header);
320
321 if (lapic_nmi->lint != 1)
322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
323
324 return 0;
325 }
326
327 #endif /*CONFIG_X86_LOCAL_APIC */
328
329 #ifdef CONFIG_X86_IO_APIC
330
331 static int __init
332 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
333 {
334 struct acpi_madt_io_apic *ioapic = NULL;
335
336 ioapic = (struct acpi_madt_io_apic *)header;
337
338 if (BAD_MADT_ENTRY(ioapic, end))
339 return -EINVAL;
340
341 acpi_table_print_madt_entry(header);
342
343 mp_register_ioapic(ioapic->id,
344 ioapic->address, ioapic->global_irq_base);
345
346 return 0;
347 }
348
349 /*
350 * Parse Interrupt Source Override for the ACPI SCI
351 */
352 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
353 {
354 if (trigger == 0) /* compatible SCI trigger is level */
355 trigger = 3;
356
357 if (polarity == 0) /* compatible SCI polarity is low */
358 polarity = 3;
359
360 /* Command-line over-ride via acpi_sci= */
361 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
362 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
363
364 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
365 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
366
367 /*
368 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
369 * If GSI is < 16, this will update its flags,
370 * else it will create a new mp_irqs[] entry.
371 */
372 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
373
374 /*
375 * stash over-ride to indicate we've been here
376 * and for later update of acpi_gbl_FADT
377 */
378 acpi_sci_override_gsi = gsi;
379 return;
380 }
381
382 static int __init
383 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
384 const unsigned long end)
385 {
386 struct acpi_madt_interrupt_override *intsrc = NULL;
387
388 intsrc = (struct acpi_madt_interrupt_override *)header;
389
390 if (BAD_MADT_ENTRY(intsrc, end))
391 return -EINVAL;
392
393 acpi_table_print_madt_entry(header);
394
395 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
396 acpi_sci_ioapic_setup(intsrc->global_irq,
397 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
398 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
399 return 0;
400 }
401
402 if (acpi_skip_timer_override &&
403 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
404 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
405 return 0;
406 }
407
408 mp_override_legacy_irq(intsrc->source_irq,
409 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
410 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
411 intsrc->global_irq);
412
413 return 0;
414 }
415
416 static int __init
417 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
418 {
419 struct acpi_madt_nmi_source *nmi_src = NULL;
420
421 nmi_src = (struct acpi_madt_nmi_source *)header;
422
423 if (BAD_MADT_ENTRY(nmi_src, end))
424 return -EINVAL;
425
426 acpi_table_print_madt_entry(header);
427
428 /* TBD: Support nimsrc entries? */
429
430 return 0;
431 }
432
433 #endif /* CONFIG_X86_IO_APIC */
434
435 /*
436 * acpi_pic_sci_set_trigger()
437 *
438 * use ELCR to set PIC-mode trigger type for SCI
439 *
440 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
441 * it may require Edge Trigger -- use "acpi_sci=edge"
442 *
443 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
444 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
445 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
446 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
447 */
448
449 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
450 {
451 unsigned int mask = 1 << irq;
452 unsigned int old, new;
453
454 /* Real old ELCR mask */
455 old = inb(0x4d0) | (inb(0x4d1) << 8);
456
457 /*
458 * If we use ACPI to set PCI IRQs, then we should clear ELCR
459 * since we will set it correctly as we enable the PCI irq
460 * routing.
461 */
462 new = acpi_noirq ? old : 0;
463
464 /*
465 * Update SCI information in the ELCR, it isn't in the PCI
466 * routing tables..
467 */
468 switch (trigger) {
469 case 1: /* Edge - clear */
470 new &= ~mask;
471 break;
472 case 3: /* Level - set */
473 new |= mask;
474 break;
475 }
476
477 if (old == new)
478 return;
479
480 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
481 outb(new, 0x4d0);
482 outb(new >> 8, 0x4d1);
483 }
484
485 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
486 {
487 *irq = gsi;
488 return 0;
489 }
490
491 /*
492 * success: return IRQ number (>=0)
493 * failure: return < 0
494 */
495 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
496 {
497 unsigned int irq;
498 unsigned int plat_gsi = gsi;
499
500 #ifdef CONFIG_PCI
501 /*
502 * Make sure all (legacy) PCI IRQs are set as level-triggered.
503 */
504 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
505 if (triggering == ACPI_LEVEL_SENSITIVE)
506 eisa_set_level_irq(gsi);
507 }
508 #endif
509
510 #ifdef CONFIG_X86_IO_APIC
511 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
512 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
513 }
514 #endif
515 acpi_gsi_to_irq(plat_gsi, &irq);
516 return irq;
517 }
518
519 /*
520 * ACPI based hotplug support for CPU
521 */
522 #ifdef CONFIG_ACPI_HOTPLUG_CPU
523
524 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
525 {
526 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
527 union acpi_object *obj;
528 struct acpi_madt_local_apic *lapic;
529 cpumask_t tmp_map, new_map;
530 u8 physid;
531 int cpu;
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 tmp_map = cpu_present_map;
561 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
562
563 /*
564 * If mp_register_lapic successfully generates a new logical cpu
565 * number, then the following will get us exactly what was mapped
566 */
567 cpus_andnot(new_map, cpu_present_map, tmp_map);
568 if (cpus_empty(new_map)) {
569 printk ("Unable to map lapic to logical cpu number\n");
570 return -EINVAL;
571 }
572
573 cpu = first_cpu(new_map);
574
575 *pcpu = cpu;
576 return 0;
577 }
578
579 /* wrapper to silence section mismatch warning */
580 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
581 {
582 return _acpi_map_lsapic(handle, pcpu);
583 }
584 EXPORT_SYMBOL(acpi_map_lsapic);
585
586 int acpi_unmap_lsapic(int cpu)
587 {
588 per_cpu(x86_cpu_to_apicid, cpu) = -1;
589 cpu_clear(cpu, cpu_present_map);
590 num_processors--;
591
592 return (0);
593 }
594
595 EXPORT_SYMBOL(acpi_unmap_lsapic);
596 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
597
598 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
599 {
600 /* TBD */
601 return -EINVAL;
602 }
603
604 EXPORT_SYMBOL(acpi_register_ioapic);
605
606 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
607 {
608 /* TBD */
609 return -EINVAL;
610 }
611
612 EXPORT_SYMBOL(acpi_unregister_ioapic);
613
614 static int __init acpi_parse_sbf(struct acpi_table_header *table)
615 {
616 struct acpi_table_boot *sb;
617
618 sb = (struct acpi_table_boot *)table;
619 if (!sb) {
620 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
621 return -ENODEV;
622 }
623
624 sbf_port = sb->cmos_index; /* Save CMOS port */
625
626 return 0;
627 }
628
629 #ifdef CONFIG_HPET_TIMER
630 #include <asm/hpet.h>
631
632 static struct __initdata resource *hpet_res;
633
634 static int __init acpi_parse_hpet(struct acpi_table_header *table)
635 {
636 struct acpi_table_hpet *hpet_tbl;
637
638 hpet_tbl = (struct acpi_table_hpet *)table;
639 if (!hpet_tbl) {
640 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
641 return -ENODEV;
642 }
643
644 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
645 printk(KERN_WARNING PREFIX "HPET timers must be located in "
646 "memory.\n");
647 return -1;
648 }
649
650 hpet_address = hpet_tbl->address.address;
651
652 /*
653 * Some broken BIOSes advertise HPET at 0x0. We really do not
654 * want to allocate a resource there.
655 */
656 if (!hpet_address) {
657 printk(KERN_WARNING PREFIX
658 "HPET id: %#x base: %#lx is invalid\n",
659 hpet_tbl->id, hpet_address);
660 return 0;
661 }
662 #ifdef CONFIG_X86_64
663 /*
664 * Some even more broken BIOSes advertise HPET at
665 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
666 * some noise:
667 */
668 if (hpet_address == 0xfed0000000000000UL) {
669 if (!hpet_force_user) {
670 printk(KERN_WARNING PREFIX "HPET id: %#x "
671 "base: 0xfed0000000000000 is bogus\n "
672 "try hpet=force on the kernel command line to "
673 "fix it up to 0xfed00000.\n", hpet_tbl->id);
674 hpet_address = 0;
675 return 0;
676 }
677 printk(KERN_WARNING PREFIX
678 "HPET id: %#x base: 0xfed0000000000000 fixed up "
679 "to 0xfed00000.\n", hpet_tbl->id);
680 hpet_address >>= 32;
681 }
682 #endif
683 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
684 hpet_tbl->id, hpet_address);
685
686 /*
687 * Allocate and initialize the HPET firmware resource for adding into
688 * the resource tree during the lateinit timeframe.
689 */
690 #define HPET_RESOURCE_NAME_SIZE 9
691 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
692
693 hpet_res->name = (void *)&hpet_res[1];
694 hpet_res->flags = IORESOURCE_MEM;
695 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
696 hpet_tbl->sequence);
697
698 hpet_res->start = hpet_address;
699 hpet_res->end = hpet_address + (1 * 1024) - 1;
700
701 return 0;
702 }
703
704 /*
705 * hpet_insert_resource inserts the HPET resources used into the resource
706 * tree.
707 */
708 static __init int hpet_insert_resource(void)
709 {
710 if (!hpet_res)
711 return 1;
712
713 return insert_resource(&iomem_resource, hpet_res);
714 }
715
716 late_initcall(hpet_insert_resource);
717
718 #else
719 #define acpi_parse_hpet NULL
720 #endif
721
722 static int __init acpi_parse_fadt(struct acpi_table_header *table)
723 {
724
725 #ifdef CONFIG_X86_PM_TIMER
726 /* detect the location of the ACPI PM Timer */
727 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
728 /* FADT rev. 2 */
729 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
730 ACPI_ADR_SPACE_SYSTEM_IO)
731 return 0;
732
733 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
734 /*
735 * "X" fields are optional extensions to the original V1.0
736 * fields, so we must selectively expand V1.0 fields if the
737 * corresponding X field is zero.
738 */
739 if (!pmtmr_ioport)
740 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
741 } else {
742 /* FADT rev. 1 */
743 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
744 }
745 if (pmtmr_ioport)
746 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
747 pmtmr_ioport);
748 #endif
749 return 0;
750 }
751
752 #ifdef CONFIG_X86_LOCAL_APIC
753 /*
754 * Parse LAPIC entries in MADT
755 * returns 0 on success, < 0 on error
756 */
757
758 static void __init acpi_register_lapic_address(unsigned long address)
759 {
760 mp_lapic_addr = address;
761
762 set_fixmap_nocache(FIX_APIC_BASE, address);
763 if (boot_cpu_physical_apicid == -1U) {
764 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
765 #ifdef CONFIG_X86_32
766 apic_version[boot_cpu_physical_apicid] =
767 GET_APIC_VERSION(apic_read(APIC_LVR));
768 #endif
769 }
770 }
771
772 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
773 {
774 int count;
775
776 if (!cpu_has_apic)
777 return -ENODEV;
778
779 /*
780 * Note that the LAPIC address is obtained from the MADT (32-bit value)
781 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
782 */
783
784 count =
785 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
786 acpi_parse_lapic_addr_ovr, 0);
787 if (count < 0) {
788 printk(KERN_ERR PREFIX
789 "Error parsing LAPIC address override entry\n");
790 return count;
791 }
792
793 acpi_register_lapic_address(acpi_lapic_addr);
794
795 return count;
796 }
797
798 static int __init acpi_parse_madt_lapic_entries(void)
799 {
800 int count;
801
802 if (!cpu_has_apic)
803 return -ENODEV;
804
805 /*
806 * Note that the LAPIC address is obtained from the MADT (32-bit value)
807 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
808 */
809
810 count =
811 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
812 acpi_parse_lapic_addr_ovr, 0);
813 if (count < 0) {
814 printk(KERN_ERR PREFIX
815 "Error parsing LAPIC address override entry\n");
816 return count;
817 }
818
819 acpi_register_lapic_address(acpi_lapic_addr);
820
821 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
822 acpi_parse_sapic, MAX_APICS);
823
824 if (!count)
825 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
826 acpi_parse_lapic, MAX_APICS);
827 if (!count) {
828 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
829 /* TBD: Cleanup to allow fallback to MPS */
830 return -ENODEV;
831 } else if (count < 0) {
832 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
833 /* TBD: Cleanup to allow fallback to MPS */
834 return count;
835 }
836
837 count =
838 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
839 if (count < 0) {
840 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
841 /* TBD: Cleanup to allow fallback to MPS */
842 return count;
843 }
844 return 0;
845 }
846 #endif /* CONFIG_X86_LOCAL_APIC */
847
848 #ifdef CONFIG_X86_IO_APIC
849 #define MP_ISA_BUS 0
850
851 #ifdef CONFIG_X86_ES7000
852 extern int es7000_plat;
853 #endif
854
855 static struct {
856 int apic_id;
857 int gsi_base;
858 int gsi_end;
859 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
860 } mp_ioapic_routing[MAX_IO_APICS];
861
862 static int mp_find_ioapic(int gsi)
863 {
864 int i = 0;
865
866 /* Find the IOAPIC that manages this GSI. */
867 for (i = 0; i < nr_ioapics; i++) {
868 if ((gsi >= mp_ioapic_routing[i].gsi_base)
869 && (gsi <= mp_ioapic_routing[i].gsi_end))
870 return i;
871 }
872
873 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
874 return -1;
875 }
876
877 static u8 __init uniq_ioapic_id(u8 id)
878 {
879 #ifdef CONFIG_X86_32
880 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
881 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
882 return io_apic_get_unique_id(nr_ioapics, id);
883 else
884 return id;
885 #else
886 int i;
887 DECLARE_BITMAP(used, 256);
888 bitmap_zero(used, 256);
889 for (i = 0; i < nr_ioapics; i++) {
890 struct mp_config_ioapic *ia = &mp_ioapics[i];
891 __set_bit(ia->mp_apicid, used);
892 }
893 if (!test_bit(id, used))
894 return id;
895 return find_first_zero_bit(used, 256);
896 #endif
897 }
898
899 static int bad_ioapic(unsigned long address)
900 {
901 if (nr_ioapics >= MAX_IO_APICS) {
902 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
903 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
904 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
905 }
906 if (!address) {
907 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
908 " found in table, skipping!\n");
909 return 1;
910 }
911 return 0;
912 }
913
914 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
915 {
916 int idx = 0;
917
918 if (bad_ioapic(address))
919 return;
920
921 idx = nr_ioapics;
922
923 mp_ioapics[idx].mp_type = MP_IOAPIC;
924 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
925 mp_ioapics[idx].mp_apicaddr = address;
926
927 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
928 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
929 #ifdef CONFIG_X86_32
930 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
931 #else
932 mp_ioapics[idx].mp_apicver = 0;
933 #endif
934 /*
935 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
936 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
937 */
938 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
939 mp_ioapic_routing[idx].gsi_base = gsi_base;
940 mp_ioapic_routing[idx].gsi_end = gsi_base +
941 io_apic_get_redir_entries(idx);
942
943 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
944 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
945 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
946 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
947
948 nr_ioapics++;
949 }
950
951 static void assign_to_mp_irq(struct mp_config_intsrc *m,
952 struct mp_config_intsrc *mp_irq)
953 {
954 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
955 }
956
957 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
958 struct mp_config_intsrc *m)
959 {
960 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
961 }
962
963 static void save_mp_irq(struct mp_config_intsrc *m)
964 {
965 int i;
966
967 for (i = 0; i < mp_irq_entries; i++) {
968 if (!mp_irq_cmp(&mp_irqs[i], m))
969 return;
970 }
971
972 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
973 if (++mp_irq_entries == MAX_IRQ_SOURCES)
974 panic("Max # of irq sources exceeded!!\n");
975 }
976
977 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
978 {
979 int ioapic;
980 int pin;
981 struct mp_config_intsrc mp_irq;
982
983 /*
984 * Convert 'gsi' to 'ioapic.pin'.
985 */
986 ioapic = mp_find_ioapic(gsi);
987 if (ioapic < 0)
988 return;
989 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
990
991 /*
992 * TBD: This check is for faulty timer entries, where the override
993 * erroneously sets the trigger to level, resulting in a HUGE
994 * increase of timer interrupts!
995 */
996 if ((bus_irq == 0) && (trigger == 3))
997 trigger = 1;
998
999 mp_irq.mp_type = MP_INTSRC;
1000 mp_irq.mp_irqtype = mp_INT;
1001 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1002 mp_irq.mp_srcbus = MP_ISA_BUS;
1003 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1004 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1005 mp_irq.mp_dstirq = pin; /* INTIN# */
1006
1007 save_mp_irq(&mp_irq);
1008 }
1009
1010 void __init mp_config_acpi_legacy_irqs(void)
1011 {
1012 int i;
1013 int ioapic;
1014 unsigned int dstapic;
1015 struct mp_config_intsrc mp_irq;
1016
1017 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1018 /*
1019 * Fabricate the legacy ISA bus (bus #31).
1020 */
1021 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1022 #endif
1023 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1024 Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
1025
1026 #ifdef CONFIG_X86_ES7000
1027 /*
1028 * Older generations of ES7000 have no legacy identity mappings
1029 */
1030 if (es7000_plat == 1)
1031 return;
1032 #endif
1033
1034 /*
1035 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1036 */
1037 ioapic = mp_find_ioapic(0);
1038 if (ioapic < 0)
1039 return;
1040 dstapic = mp_ioapics[ioapic].mp_apicid;
1041
1042 /*
1043 * Use the default configuration for the IRQs 0-15. Unless
1044 * overridden by (MADT) interrupt source override entries.
1045 */
1046 for (i = 0; i < 16; i++) {
1047 int idx;
1048
1049 for (idx = 0; idx < mp_irq_entries; idx++) {
1050 struct mp_config_intsrc *irq = mp_irqs + idx;
1051
1052 /* Do we already have a mapping for this ISA IRQ? */
1053 if (irq->mp_srcbus == MP_ISA_BUS
1054 && irq->mp_srcbusirq == i)
1055 break;
1056
1057 /* Do we already have a mapping for this IOAPIC pin */
1058 if (irq->mp_dstapic == dstapic &&
1059 irq->mp_dstirq == i)
1060 break;
1061 }
1062
1063 if (idx != mp_irq_entries) {
1064 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1065 continue; /* IRQ already used */
1066 }
1067
1068 mp_irq.mp_type = MP_INTSRC;
1069 mp_irq.mp_irqflag = 0; /* Conforming */
1070 mp_irq.mp_srcbus = MP_ISA_BUS;
1071 mp_irq.mp_dstapic = dstapic;
1072 mp_irq.mp_irqtype = mp_INT;
1073 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1074 mp_irq.mp_dstirq = i;
1075
1076 save_mp_irq(&mp_irq);
1077 }
1078 }
1079
1080 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1081 {
1082 int ioapic;
1083 int ioapic_pin;
1084 #ifdef CONFIG_X86_32
1085 #define MAX_GSI_NUM 4096
1086 #define IRQ_COMPRESSION_START 64
1087
1088 static int pci_irq = IRQ_COMPRESSION_START;
1089 /*
1090 * Mapping between Global System Interrupts, which
1091 * represent all possible interrupts, and IRQs
1092 * assigned to actual devices.
1093 */
1094 static int gsi_to_irq[MAX_GSI_NUM];
1095 #else
1096
1097 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1098 return gsi;
1099 #endif
1100
1101 /* Don't set up the ACPI SCI because it's already set up */
1102 if (acpi_gbl_FADT.sci_interrupt == gsi)
1103 return gsi;
1104
1105 ioapic = mp_find_ioapic(gsi);
1106 if (ioapic < 0) {
1107 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1108 return gsi;
1109 }
1110
1111 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1112
1113 #ifdef CONFIG_X86_32
1114 if (ioapic_renumber_irq)
1115 gsi = ioapic_renumber_irq(ioapic, gsi);
1116 #endif
1117
1118 /*
1119 * Avoid pin reprogramming. PRTs typically include entries
1120 * with redundant pin->gsi mappings (but unique PCI devices);
1121 * we only program the IOAPIC on the first.
1122 */
1123 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1124 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1125 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1126 ioapic_pin);
1127 return gsi;
1128 }
1129 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1130 Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
1131 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1132 #ifdef CONFIG_X86_32
1133 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1134 #else
1135 return gsi;
1136 #endif
1137 }
1138
1139 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1140 #ifdef CONFIG_X86_32
1141 /*
1142 * For GSI >= 64, use IRQ compression
1143 */
1144 if ((gsi >= IRQ_COMPRESSION_START)
1145 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1146 /*
1147 * For PCI devices assign IRQs in order, avoiding gaps
1148 * due to unused I/O APIC pins.
1149 */
1150 int irq = gsi;
1151 if (gsi < MAX_GSI_NUM) {
1152 /*
1153 * Retain the VIA chipset work-around (gsi > 15), but
1154 * avoid a problem where the 8254 timer (IRQ0) is setup
1155 * via an override (so it's not on pin 0 of the ioapic),
1156 * and at the same time, the pin 0 interrupt is a PCI
1157 * type. The gsi > 15 test could cause these two pins
1158 * to be shared as IRQ0, and they are not shareable.
1159 * So test for this condition, and if necessary, avoid
1160 * the pin collision.
1161 */
1162 gsi = pci_irq++;
1163 /*
1164 * Don't assign IRQ used by ACPI SCI
1165 */
1166 if (gsi == acpi_gbl_FADT.sci_interrupt)
1167 gsi = pci_irq++;
1168 gsi_to_irq[irq] = gsi;
1169 } else {
1170 printk(KERN_ERR "GSI %u is too high\n", gsi);
1171 return gsi;
1172 }
1173 }
1174 #endif
1175 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1176 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1177 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1178 return gsi;
1179 }
1180
1181 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1182 u32 gsi, int triggering, int polarity)
1183 {
1184 #ifdef CONFIG_X86_MPPARSE
1185 struct mp_config_intsrc mp_irq;
1186 int ioapic;
1187
1188 if (!acpi_ioapic)
1189 return 0;
1190
1191 /* print the entry should happen on mptable identically */
1192 mp_irq.mp_type = MP_INTSRC;
1193 mp_irq.mp_irqtype = mp_INT;
1194 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1195 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1196 mp_irq.mp_srcbus = number;
1197 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1198 ioapic = mp_find_ioapic(gsi);
1199 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1200 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1201
1202 save_mp_irq(&mp_irq);
1203 #endif
1204 return 0;
1205 }
1206
1207 /*
1208 * Parse IOAPIC related entries in MADT
1209 * returns 0 on success, < 0 on error
1210 */
1211 static int __init acpi_parse_madt_ioapic_entries(void)
1212 {
1213 int count;
1214
1215 /*
1216 * ACPI interpreter is required to complete interrupt setup,
1217 * so if it is off, don't enumerate the io-apics with ACPI.
1218 * If MPS is present, it will handle them,
1219 * otherwise the system will stay in PIC mode
1220 */
1221 if (acpi_disabled || acpi_noirq) {
1222 return -ENODEV;
1223 }
1224
1225 if (!cpu_has_apic)
1226 return -ENODEV;
1227
1228 /*
1229 * if "noapic" boot option, don't look for IO-APICs
1230 */
1231 if (skip_ioapic_setup) {
1232 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1233 "due to 'noapic' option.\n");
1234 return -ENODEV;
1235 }
1236
1237 count =
1238 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1239 MAX_IO_APICS);
1240 if (!count) {
1241 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1242 return -ENODEV;
1243 } else if (count < 0) {
1244 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1245 return count;
1246 }
1247
1248 count =
1249 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1250 NR_IRQ_VECTORS);
1251 if (count < 0) {
1252 printk(KERN_ERR PREFIX
1253 "Error parsing interrupt source overrides entry\n");
1254 /* TBD: Cleanup to allow fallback to MPS */
1255 return count;
1256 }
1257
1258 /*
1259 * If BIOS did not supply an INT_SRC_OVR for the SCI
1260 * pretend we got one so we can set the SCI flags.
1261 */
1262 if (!acpi_sci_override_gsi)
1263 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1264
1265 /* Fill in identity legacy mapings where no override */
1266 mp_config_acpi_legacy_irqs();
1267
1268 count =
1269 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1270 NR_IRQ_VECTORS);
1271 if (count < 0) {
1272 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1273 /* TBD: Cleanup to allow fallback to MPS */
1274 return count;
1275 }
1276
1277 return 0;
1278 }
1279 #else
1280 static inline int acpi_parse_madt_ioapic_entries(void)
1281 {
1282 return -1;
1283 }
1284 #endif /* !CONFIG_X86_IO_APIC */
1285
1286 static void __init early_acpi_process_madt(void)
1287 {
1288 #ifdef CONFIG_X86_LOCAL_APIC
1289 int error;
1290
1291 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1292
1293 /*
1294 * Parse MADT LAPIC entries
1295 */
1296 error = early_acpi_parse_madt_lapic_addr_ovr();
1297 if (!error) {
1298 acpi_lapic = 1;
1299 smp_found_config = 1;
1300 }
1301 if (error == -EINVAL) {
1302 /*
1303 * Dell Precision Workstation 410, 610 come here.
1304 */
1305 printk(KERN_ERR PREFIX
1306 "Invalid BIOS MADT, disabling ACPI\n");
1307 disable_acpi();
1308 }
1309 }
1310 #endif
1311 }
1312
1313 static void __init acpi_process_madt(void)
1314 {
1315 #ifdef CONFIG_X86_LOCAL_APIC
1316 int error;
1317
1318 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1319
1320 /*
1321 * Parse MADT LAPIC entries
1322 */
1323 error = acpi_parse_madt_lapic_entries();
1324 if (!error) {
1325 acpi_lapic = 1;
1326
1327 #ifdef CONFIG_X86_GENERICARCH
1328 generic_bigsmp_probe();
1329 #endif
1330 /*
1331 * Parse MADT IO-APIC entries
1332 */
1333 error = acpi_parse_madt_ioapic_entries();
1334 if (!error) {
1335 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1336 acpi_irq_balance_set(NULL);
1337 acpi_ioapic = 1;
1338
1339 smp_found_config = 1;
1340 setup_apic_routing();
1341 }
1342 }
1343 if (error == -EINVAL) {
1344 /*
1345 * Dell Precision Workstation 410, 610 come here.
1346 */
1347 printk(KERN_ERR PREFIX
1348 "Invalid BIOS MADT, disabling ACPI\n");
1349 disable_acpi();
1350 }
1351 }
1352 #endif
1353 return;
1354 }
1355
1356 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1357 {
1358 if (!acpi_force) {
1359 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1360 d->ident);
1361 acpi_noirq_set();
1362 }
1363 return 0;
1364 }
1365
1366 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1367 {
1368 if (!acpi_force) {
1369 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1370 d->ident);
1371 acpi_disable_pci();
1372 }
1373 return 0;
1374 }
1375
1376 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1377 {
1378 if (!acpi_force) {
1379 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1380 disable_acpi();
1381 } else {
1382 printk(KERN_NOTICE
1383 "Warning: DMI blacklist says broken, but acpi forced\n");
1384 }
1385 return 0;
1386 }
1387
1388 /*
1389 * Limit ACPI to CPU enumeration for HT
1390 */
1391 static int __init force_acpi_ht(const struct dmi_system_id *d)
1392 {
1393 if (!acpi_force) {
1394 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1395 d->ident);
1396 disable_acpi();
1397 acpi_ht = 1;
1398 } else {
1399 printk(KERN_NOTICE
1400 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1401 }
1402 return 0;
1403 }
1404
1405 /*
1406 * Force ignoring BIOS IRQ0 pin2 override
1407 */
1408 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1409 {
1410 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1411 acpi_skip_timer_override = 1;
1412 return 0;
1413 }
1414
1415 /*
1416 * If your system is blacklisted here, but you find that acpi=force
1417 * works for you, please contact acpi-devel@sourceforge.net
1418 */
1419 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1420 /*
1421 * Boxes that need ACPI disabled
1422 */
1423 {
1424 .callback = dmi_disable_acpi,
1425 .ident = "IBM Thinkpad",
1426 .matches = {
1427 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1428 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1429 },
1430 },
1431
1432 /*
1433 * Boxes that need acpi=ht
1434 */
1435 {
1436 .callback = force_acpi_ht,
1437 .ident = "FSC Primergy T850",
1438 .matches = {
1439 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1440 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1441 },
1442 },
1443 {
1444 .callback = force_acpi_ht,
1445 .ident = "HP VISUALIZE NT Workstation",
1446 .matches = {
1447 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1449 },
1450 },
1451 {
1452 .callback = force_acpi_ht,
1453 .ident = "Compaq Workstation W8000",
1454 .matches = {
1455 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1457 },
1458 },
1459 {
1460 .callback = force_acpi_ht,
1461 .ident = "ASUS P4B266",
1462 .matches = {
1463 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1464 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1465 },
1466 },
1467 {
1468 .callback = force_acpi_ht,
1469 .ident = "ASUS P2B-DS",
1470 .matches = {
1471 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1472 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1473 },
1474 },
1475 {
1476 .callback = force_acpi_ht,
1477 .ident = "ASUS CUR-DLS",
1478 .matches = {
1479 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1480 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1481 },
1482 },
1483 {
1484 .callback = force_acpi_ht,
1485 .ident = "ABIT i440BX-W83977",
1486 .matches = {
1487 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1488 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1489 },
1490 },
1491 {
1492 .callback = force_acpi_ht,
1493 .ident = "IBM Bladecenter",
1494 .matches = {
1495 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1496 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1497 },
1498 },
1499 {
1500 .callback = force_acpi_ht,
1501 .ident = "IBM eServer xSeries 360",
1502 .matches = {
1503 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1504 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1505 },
1506 },
1507 {
1508 .callback = force_acpi_ht,
1509 .ident = "IBM eserver xSeries 330",
1510 .matches = {
1511 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1512 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1513 },
1514 },
1515 {
1516 .callback = force_acpi_ht,
1517 .ident = "IBM eserver xSeries 440",
1518 .matches = {
1519 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1520 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1521 },
1522 },
1523
1524 /*
1525 * Boxes that need ACPI PCI IRQ routing disabled
1526 */
1527 {
1528 .callback = disable_acpi_irq,
1529 .ident = "ASUS A7V",
1530 .matches = {
1531 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1532 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1533 /* newer BIOS, Revision 1011, does work */
1534 DMI_MATCH(DMI_BIOS_VERSION,
1535 "ASUS A7V ACPI BIOS Revision 1007"),
1536 },
1537 },
1538 {
1539 /*
1540 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1541 * for LPC bridge, which is needed for the PCI
1542 * interrupt links to work. DSDT fix is in bug 5966.
1543 * 2645, 2646 model numbers are shared with 600/600E/600X
1544 */
1545 .callback = disable_acpi_irq,
1546 .ident = "IBM Thinkpad 600 Series 2645",
1547 .matches = {
1548 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1549 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1550 },
1551 },
1552 {
1553 .callback = disable_acpi_irq,
1554 .ident = "IBM Thinkpad 600 Series 2646",
1555 .matches = {
1556 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1557 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1558 },
1559 },
1560 /*
1561 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1562 */
1563 { /* _BBN 0 bug */
1564 .callback = disable_acpi_pci,
1565 .ident = "ASUS PR-DLS",
1566 .matches = {
1567 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1568 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1569 DMI_MATCH(DMI_BIOS_VERSION,
1570 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1571 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1572 },
1573 },
1574 {
1575 .callback = disable_acpi_pci,
1576 .ident = "Acer TravelMate 36x Laptop",
1577 .matches = {
1578 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1579 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1580 },
1581 },
1582 /*
1583 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1584 * which includes some code which overrides all temperature
1585 * trip points to 16C if the INTIN2 input of the I/O APIC
1586 * is enabled. This input is incorrectly designated the
1587 * ISA IRQ 0 via an interrupt source override even though
1588 * it is wired to the output of the master 8259A and INTIN0
1589 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1590 * override in that cases.
1591 */
1592 {
1593 .callback = dmi_ignore_irq0_timer_override,
1594 .ident = "HP NX6125 laptop",
1595 .matches = {
1596 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1597 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1598 },
1599 },
1600 {
1601 .callback = dmi_ignore_irq0_timer_override,
1602 .ident = "HP NX6325 laptop",
1603 .matches = {
1604 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1605 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1606 },
1607 },
1608 {}
1609 };
1610
1611 /*
1612 * acpi_boot_table_init() and acpi_boot_init()
1613 * called from setup_arch(), always.
1614 * 1. checksums all tables
1615 * 2. enumerates lapics
1616 * 3. enumerates io-apics
1617 *
1618 * acpi_table_init() is separate to allow reading SRAT without
1619 * other side effects.
1620 *
1621 * side effects of acpi_boot_init:
1622 * acpi_lapic = 1 if LAPIC found
1623 * acpi_ioapic = 1 if IOAPIC found
1624 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1625 * if acpi_blacklisted() acpi_disabled = 1;
1626 * acpi_irq_model=...
1627 * ...
1628 *
1629 * return value: (currently ignored)
1630 * 0: success
1631 * !0: failure
1632 */
1633
1634 int __init acpi_boot_table_init(void)
1635 {
1636 int error;
1637
1638 dmi_check_system(acpi_dmi_table);
1639
1640 /*
1641 * If acpi_disabled, bail out
1642 * One exception: acpi=ht continues far enough to enumerate LAPICs
1643 */
1644 if (acpi_disabled && !acpi_ht)
1645 return 1;
1646
1647 /*
1648 * Initialize the ACPI boot-time table parser.
1649 */
1650 error = acpi_table_init();
1651 if (error) {
1652 disable_acpi();
1653 return error;
1654 }
1655
1656 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1657
1658 /*
1659 * blacklist may disable ACPI entirely
1660 */
1661 error = acpi_blacklisted();
1662 if (error) {
1663 if (acpi_force) {
1664 printk(KERN_WARNING PREFIX "acpi=force override\n");
1665 } else {
1666 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1667 disable_acpi();
1668 return error;
1669 }
1670 }
1671
1672 return 0;
1673 }
1674
1675 int __init early_acpi_boot_init(void)
1676 {
1677 /*
1678 * If acpi_disabled, bail out
1679 * One exception: acpi=ht continues far enough to enumerate LAPICs
1680 */
1681 if (acpi_disabled && !acpi_ht)
1682 return 1;
1683
1684 /*
1685 * Process the Multiple APIC Description Table (MADT), if present
1686 */
1687 early_acpi_process_madt();
1688
1689 return 0;
1690 }
1691
1692 int __init acpi_boot_init(void)
1693 {
1694 /*
1695 * If acpi_disabled, bail out
1696 * One exception: acpi=ht continues far enough to enumerate LAPICs
1697 */
1698 if (acpi_disabled && !acpi_ht)
1699 return 1;
1700
1701 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1702
1703 /*
1704 * set sci_int and PM timer address
1705 */
1706 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1707
1708 /*
1709 * Process the Multiple APIC Description Table (MADT), if present
1710 */
1711 acpi_process_madt();
1712
1713 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1714
1715 return 0;
1716 }
1717
1718 static int __init parse_acpi(char *arg)
1719 {
1720 if (!arg)
1721 return -EINVAL;
1722
1723 /* "acpi=off" disables both ACPI table parsing and interpreter */
1724 if (strcmp(arg, "off") == 0) {
1725 disable_acpi();
1726 }
1727 /* acpi=force to over-ride black-list */
1728 else if (strcmp(arg, "force") == 0) {
1729 acpi_force = 1;
1730 acpi_ht = 1;
1731 acpi_disabled = 0;
1732 }
1733 /* acpi=strict disables out-of-spec workarounds */
1734 else if (strcmp(arg, "strict") == 0) {
1735 acpi_strict = 1;
1736 }
1737 /* Limit ACPI just to boot-time to enable HT */
1738 else if (strcmp(arg, "ht") == 0) {
1739 if (!acpi_force)
1740 disable_acpi();
1741 acpi_ht = 1;
1742 }
1743 /* "acpi=noirq" disables ACPI interrupt routing */
1744 else if (strcmp(arg, "noirq") == 0) {
1745 acpi_noirq_set();
1746 } else {
1747 /* Core will printk when we return error. */
1748 return -EINVAL;
1749 }
1750 return 0;
1751 }
1752 early_param("acpi", parse_acpi);
1753
1754 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1755 static int __init parse_pci(char *arg)
1756 {
1757 if (arg && strcmp(arg, "noacpi") == 0)
1758 acpi_disable_pci();
1759 return 0;
1760 }
1761 early_param("pci", parse_pci);
1762
1763 int __init acpi_mps_check(void)
1764 {
1765 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1766 /* mptable code is not built-in*/
1767 if (acpi_disabled || acpi_noirq) {
1768 printk(KERN_WARNING "MPS support code is not built-in.\n"
1769 "Using acpi=off or acpi=noirq or pci=noacpi "
1770 "may have problem\n");
1771 return 1;
1772 }
1773 #endif
1774 return 0;
1775 }
1776
1777 #ifdef CONFIG_X86_IO_APIC
1778 static int __init parse_acpi_skip_timer_override(char *arg)
1779 {
1780 acpi_skip_timer_override = 1;
1781 return 0;
1782 }
1783 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1784
1785 static int __init parse_acpi_use_timer_override(char *arg)
1786 {
1787 acpi_use_timer_override = 1;
1788 return 0;
1789 }
1790 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1791 #endif /* CONFIG_X86_IO_APIC */
1792
1793 static int __init setup_acpi_sci(char *s)
1794 {
1795 if (!s)
1796 return -EINVAL;
1797 if (!strcmp(s, "edge"))
1798 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1799 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1800 else if (!strcmp(s, "level"))
1801 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1802 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1803 else if (!strcmp(s, "high"))
1804 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1805 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1806 else if (!strcmp(s, "low"))
1807 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1808 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1809 else
1810 return -EINVAL;
1811 return 0;
1812 }
1813 early_param("acpi_sci", setup_acpi_sci);
1814
1815 int __acpi_acquire_global_lock(unsigned int *lock)
1816 {
1817 unsigned int old, new, val;
1818 do {
1819 old = *lock;
1820 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1821 val = cmpxchg(lock, old, new);
1822 } while (unlikely (val != old));
1823 return (new < 3) ? -1 : 0;
1824 }
1825
1826 int __acpi_release_global_lock(unsigned int *lock)
1827 {
1828 unsigned int old, new, val;
1829 do {
1830 old = *lock;
1831 new = old & ~0x3;
1832 val = cmpxchg(lock, old, new);
1833 } while (unlikely (val != old));
1834 return old & 0x1;
1835 }
Support for the Chinese Samsung S3C2440 based development boards