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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/export.h> | |
32 | #include <linux/dmi.h> | |
33 | #include <linux/irq.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/bootmem.h> | |
36 | #include <linux/ioport.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/efi-bgrt.h> | |
39 | ||
40 | #include <asm/e820/api.h> | |
41 | #include <asm/irqdomain.h> | |
42 | #include <asm/pci_x86.h> | |
43 | #include <asm/pgtable.h> | |
44 | #include <asm/io_apic.h> | |
45 | #include <asm/apic.h> | |
46 | #include <asm/io.h> | |
47 | #include <asm/mpspec.h> | |
48 | #include <asm/smp.h> | |
49 | #include <asm/i8259.h> | |
50 | ||
51 | #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ | |
52 | static int __initdata acpi_force = 0; | |
53 | int acpi_disabled; | |
54 | EXPORT_SYMBOL(acpi_disabled); | |
55 | ||
56 | #ifdef CONFIG_X86_64 | |
57 | # include <asm/proto.h> | |
58 | #endif /* X86 */ | |
59 | ||
60 | #define PREFIX "ACPI: " | |
61 | ||
62 | int acpi_noirq; /* skip ACPI IRQ initialization */ | |
63 | int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ | |
64 | EXPORT_SYMBOL(acpi_pci_disabled); | |
65 | ||
66 | int acpi_lapic; | |
67 | int acpi_ioapic; | |
68 | int acpi_strict; | |
69 | int acpi_disable_cmcff; | |
70 | ||
71 | u8 acpi_sci_flags __initdata; | |
72 | int acpi_sci_override_gsi __initdata; | |
73 | int acpi_skip_timer_override __initdata; | |
74 | int acpi_use_timer_override __initdata; | |
75 | int acpi_fix_pin2_polarity __initdata; | |
76 | ||
77 | #ifdef CONFIG_X86_LOCAL_APIC | |
78 | static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; | |
79 | #endif | |
80 | ||
81 | #ifdef CONFIG_X86_IO_APIC | |
82 | /* | |
83 | * Locks related to IOAPIC hotplug | |
84 | * Hotplug side: | |
85 | * ->device_hotplug_lock | |
86 | * ->acpi_ioapic_lock | |
87 | * ->ioapic_lock | |
88 | * Interrupt mapping side: | |
89 | * ->acpi_ioapic_lock | |
90 | * ->ioapic_mutex | |
91 | * ->ioapic_lock | |
92 | */ | |
93 | static DEFINE_MUTEX(acpi_ioapic_lock); | |
94 | #endif | |
95 | ||
96 | /* -------------------------------------------------------------------------- | |
97 | Boot-time Configuration | |
98 | -------------------------------------------------------------------------- */ | |
99 | ||
100 | /* | |
101 | * The default interrupt routing model is PIC (8259). This gets | |
102 | * overridden if IOAPICs are enumerated (below). | |
103 | */ | |
104 | enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; | |
105 | ||
106 | ||
107 | /* | |
108 | * ISA irqs by default are the first 16 gsis but can be | |
109 | * any gsi as specified by an interrupt source override. | |
110 | */ | |
111 | static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { | |
112 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 | |
113 | }; | |
114 | ||
115 | #define ACPI_INVALID_GSI INT_MIN | |
116 | ||
117 | /* | |
118 | * This is just a simple wrapper around early_ioremap(), | |
119 | * with sanity checks for phys == 0 and size == 0. | |
120 | */ | |
121 | char *__init __acpi_map_table(unsigned long phys, unsigned long size) | |
122 | { | |
123 | ||
124 | if (!phys || !size) | |
125 | return NULL; | |
126 | ||
127 | return early_ioremap(phys, size); | |
128 | } | |
129 | ||
130 | void __init __acpi_unmap_table(char *map, unsigned long size) | |
131 | { | |
132 | if (!map || !size) | |
133 | return; | |
134 | ||
135 | early_iounmap(map, size); | |
136 | } | |
137 | ||
138 | #ifdef CONFIG_X86_LOCAL_APIC | |
139 | static int __init acpi_parse_madt(struct acpi_table_header *table) | |
140 | { | |
141 | struct acpi_table_madt *madt = NULL; | |
142 | ||
143 | if (!boot_cpu_has(X86_FEATURE_APIC)) | |
144 | return -EINVAL; | |
145 | ||
146 | madt = (struct acpi_table_madt *)table; | |
147 | if (!madt) { | |
148 | printk(KERN_WARNING PREFIX "Unable to map MADT\n"); | |
149 | return -ENODEV; | |
150 | } | |
151 | ||
152 | if (madt->address) { | |
153 | acpi_lapic_addr = (u64) madt->address; | |
154 | ||
155 | printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", | |
156 | madt->address); | |
157 | } | |
158 | ||
159 | default_acpi_madt_oem_check(madt->header.oem_id, | |
160 | madt->header.oem_table_id); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | /** | |
166 | * acpi_register_lapic - register a local apic and generates a logic cpu number | |
167 | * @id: local apic id to register | |
168 | * @acpiid: ACPI id to register | |
169 | * @enabled: this cpu is enabled or not | |
170 | * | |
171 | * Returns the logic cpu number which maps to the local apic | |
172 | */ | |
173 | static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) | |
174 | { | |
175 | unsigned int ver = 0; | |
176 | int cpu; | |
177 | ||
178 | if (id >= MAX_LOCAL_APIC) { | |
179 | printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | if (!enabled) { | |
184 | ++disabled_cpus; | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
188 | if (boot_cpu_physical_apicid != -1U) | |
189 | ver = boot_cpu_apic_version; | |
190 | ||
191 | cpu = generic_processor_info(id, ver); | |
192 | if (cpu >= 0) | |
193 | early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; | |
194 | ||
195 | return cpu; | |
196 | } | |
197 | ||
198 | static int __init | |
199 | acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) | |
200 | { | |
201 | struct acpi_madt_local_x2apic *processor = NULL; | |
202 | int apic_id; | |
203 | u8 enabled; | |
204 | ||
205 | processor = (struct acpi_madt_local_x2apic *)header; | |
206 | ||
207 | if (BAD_MADT_ENTRY(processor, end)) | |
208 | return -EINVAL; | |
209 | ||
210 | acpi_table_print_madt_entry(header); | |
211 | ||
212 | apic_id = processor->local_apic_id; | |
213 | enabled = processor->lapic_flags & ACPI_MADT_ENABLED; | |
214 | #ifdef CONFIG_X86_X2APIC | |
215 | /* | |
216 | * We need to register disabled CPU as well to permit | |
217 | * counting disabled CPUs. This allows us to size | |
218 | * cpus_possible_map more accurately, to permit | |
219 | * to not preallocating memory for all NR_CPUS | |
220 | * when we use CPU hotplug. | |
221 | */ | |
222 | if (!apic->apic_id_valid(apic_id) && enabled) | |
223 | printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); | |
224 | else | |
225 | acpi_register_lapic(apic_id, processor->uid, enabled); | |
226 | #else | |
227 | printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); | |
228 | #endif | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | static int __init | |
234 | acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) | |
235 | { | |
236 | struct acpi_madt_local_apic *processor = NULL; | |
237 | ||
238 | processor = (struct acpi_madt_local_apic *)header; | |
239 | ||
240 | if (BAD_MADT_ENTRY(processor, end)) | |
241 | return -EINVAL; | |
242 | ||
243 | acpi_table_print_madt_entry(header); | |
244 | ||
245 | /* Ignore invalid ID */ | |
246 | if (processor->id == 0xff) | |
247 | return 0; | |
248 | ||
249 | /* | |
250 | * We need to register disabled CPU as well to permit | |
251 | * counting disabled CPUs. This allows us to size | |
252 | * cpus_possible_map more accurately, to permit | |
253 | * to not preallocating memory for all NR_CPUS | |
254 | * when we use CPU hotplug. | |
255 | */ | |
256 | acpi_register_lapic(processor->id, /* APIC ID */ | |
257 | processor->processor_id, /* ACPI ID */ | |
258 | processor->lapic_flags & ACPI_MADT_ENABLED); | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | static int __init | |
264 | acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) | |
265 | { | |
266 | struct acpi_madt_local_sapic *processor = NULL; | |
267 | ||
268 | processor = (struct acpi_madt_local_sapic *)header; | |
269 | ||
270 | if (BAD_MADT_ENTRY(processor, end)) | |
271 | return -EINVAL; | |
272 | ||
273 | acpi_table_print_madt_entry(header); | |
274 | ||
275 | acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ | |
276 | processor->processor_id, /* ACPI ID */ | |
277 | processor->lapic_flags & ACPI_MADT_ENABLED); | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static int __init | |
283 | acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, | |
284 | const unsigned long end) | |
285 | { | |
286 | struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; | |
287 | ||
288 | lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; | |
289 | ||
290 | if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) | |
291 | return -EINVAL; | |
292 | ||
293 | acpi_table_print_madt_entry(header); | |
294 | ||
295 | acpi_lapic_addr = lapic_addr_ovr->address; | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | static int __init | |
301 | acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, | |
302 | const unsigned long end) | |
303 | { | |
304 | struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; | |
305 | ||
306 | x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; | |
307 | ||
308 | if (BAD_MADT_ENTRY(x2apic_nmi, end)) | |
309 | return -EINVAL; | |
310 | ||
311 | acpi_table_print_madt_entry(header); | |
312 | ||
313 | if (x2apic_nmi->lint != 1) | |
314 | printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | static int __init | |
320 | acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) | |
321 | { | |
322 | struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; | |
323 | ||
324 | lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; | |
325 | ||
326 | if (BAD_MADT_ENTRY(lapic_nmi, end)) | |
327 | return -EINVAL; | |
328 | ||
329 | acpi_table_print_madt_entry(header); | |
330 | ||
331 | if (lapic_nmi->lint != 1) | |
332 | printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
337 | #endif /*CONFIG_X86_LOCAL_APIC */ | |
338 | ||
339 | #ifdef CONFIG_X86_IO_APIC | |
340 | #define MP_ISA_BUS 0 | |
341 | ||
342 | static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, | |
343 | u32 gsi) | |
344 | { | |
345 | int ioapic; | |
346 | int pin; | |
347 | struct mpc_intsrc mp_irq; | |
348 | ||
349 | /* | |
350 | * Check bus_irq boundary. | |
351 | */ | |
352 | if (bus_irq >= NR_IRQS_LEGACY) { | |
353 | pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); | |
354 | return; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Convert 'gsi' to 'ioapic.pin'. | |
359 | */ | |
360 | ioapic = mp_find_ioapic(gsi); | |
361 | if (ioapic < 0) | |
362 | return; | |
363 | pin = mp_find_ioapic_pin(ioapic, gsi); | |
364 | ||
365 | /* | |
366 | * TBD: This check is for faulty timer entries, where the override | |
367 | * erroneously sets the trigger to level, resulting in a HUGE | |
368 | * increase of timer interrupts! | |
369 | */ | |
370 | if ((bus_irq == 0) && (trigger == 3)) | |
371 | trigger = 1; | |
372 | ||
373 | mp_irq.type = MP_INTSRC; | |
374 | mp_irq.irqtype = mp_INT; | |
375 | mp_irq.irqflag = (trigger << 2) | polarity; | |
376 | mp_irq.srcbus = MP_ISA_BUS; | |
377 | mp_irq.srcbusirq = bus_irq; /* IRQ */ | |
378 | mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ | |
379 | mp_irq.dstirq = pin; /* INTIN# */ | |
380 | ||
381 | mp_save_irq(&mp_irq); | |
382 | ||
383 | /* | |
384 | * Reset default identity mapping if gsi is also an legacy IRQ, | |
385 | * otherwise there will be more than one entry with the same GSI | |
386 | * and acpi_isa_irq_to_gsi() may give wrong result. | |
387 | */ | |
388 | if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) | |
389 | isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; | |
390 | isa_irq_to_gsi[bus_irq] = gsi; | |
391 | } | |
392 | ||
393 | static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, | |
394 | int polarity) | |
395 | { | |
396 | #ifdef CONFIG_X86_MPPARSE | |
397 | struct mpc_intsrc mp_irq; | |
398 | struct pci_dev *pdev; | |
399 | unsigned char number; | |
400 | unsigned int devfn; | |
401 | int ioapic; | |
402 | u8 pin; | |
403 | ||
404 | if (!acpi_ioapic) | |
405 | return 0; | |
406 | if (!dev || !dev_is_pci(dev)) | |
407 | return 0; | |
408 | ||
409 | pdev = to_pci_dev(dev); | |
410 | number = pdev->bus->number; | |
411 | devfn = pdev->devfn; | |
412 | pin = pdev->pin; | |
413 | /* print the entry should happen on mptable identically */ | |
414 | mp_irq.type = MP_INTSRC; | |
415 | mp_irq.irqtype = mp_INT; | |
416 | mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | | |
417 | (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); | |
418 | mp_irq.srcbus = number; | |
419 | mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); | |
420 | ioapic = mp_find_ioapic(gsi); | |
421 | mp_irq.dstapic = mpc_ioapic_id(ioapic); | |
422 | mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); | |
423 | ||
424 | mp_save_irq(&mp_irq); | |
425 | #endif | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static int __init | |
430 | acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) | |
431 | { | |
432 | struct acpi_madt_io_apic *ioapic = NULL; | |
433 | struct ioapic_domain_cfg cfg = { | |
434 | .type = IOAPIC_DOMAIN_DYNAMIC, | |
435 | .ops = &mp_ioapic_irqdomain_ops, | |
436 | }; | |
437 | ||
438 | ioapic = (struct acpi_madt_io_apic *)header; | |
439 | ||
440 | if (BAD_MADT_ENTRY(ioapic, end)) | |
441 | return -EINVAL; | |
442 | ||
443 | acpi_table_print_madt_entry(header); | |
444 | ||
445 | /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ | |
446 | if (ioapic->global_irq_base < nr_legacy_irqs()) | |
447 | cfg.type = IOAPIC_DOMAIN_LEGACY; | |
448 | ||
449 | mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, | |
450 | &cfg); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Parse Interrupt Source Override for the ACPI SCI | |
457 | */ | |
458 | static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) | |
459 | { | |
460 | if (trigger == 0) /* compatible SCI trigger is level */ | |
461 | trigger = 3; | |
462 | ||
463 | if (polarity == 0) /* compatible SCI polarity is low */ | |
464 | polarity = 3; | |
465 | ||
466 | /* Command-line over-ride via acpi_sci= */ | |
467 | if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) | |
468 | trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
469 | ||
470 | if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) | |
471 | polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; | |
472 | ||
473 | mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); | |
474 | acpi_penalize_sci_irq(bus_irq, trigger, polarity); | |
475 | ||
476 | /* | |
477 | * stash over-ride to indicate we've been here | |
478 | * and for later update of acpi_gbl_FADT | |
479 | */ | |
480 | acpi_sci_override_gsi = gsi; | |
481 | return; | |
482 | } | |
483 | ||
484 | static int __init | |
485 | acpi_parse_int_src_ovr(struct acpi_subtable_header * header, | |
486 | const unsigned long end) | |
487 | { | |
488 | struct acpi_madt_interrupt_override *intsrc = NULL; | |
489 | ||
490 | intsrc = (struct acpi_madt_interrupt_override *)header; | |
491 | ||
492 | if (BAD_MADT_ENTRY(intsrc, end)) | |
493 | return -EINVAL; | |
494 | ||
495 | acpi_table_print_madt_entry(header); | |
496 | ||
497 | if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { | |
498 | acpi_sci_ioapic_setup(intsrc->source_irq, | |
499 | intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, | |
500 | (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, | |
501 | intsrc->global_irq); | |
502 | return 0; | |
503 | } | |
504 | ||
505 | if (intsrc->source_irq == 0) { | |
506 | if (acpi_skip_timer_override) { | |
507 | printk(PREFIX "BIOS IRQ0 override ignored.\n"); | |
508 | return 0; | |
509 | } | |
510 | ||
511 | if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity | |
512 | && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { | |
513 | intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; | |
514 | printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); | |
515 | } | |
516 | } | |
517 | ||
518 | mp_override_legacy_irq(intsrc->source_irq, | |
519 | intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, | |
520 | (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, | |
521 | intsrc->global_irq); | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static int __init | |
527 | acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) | |
528 | { | |
529 | struct acpi_madt_nmi_source *nmi_src = NULL; | |
530 | ||
531 | nmi_src = (struct acpi_madt_nmi_source *)header; | |
532 | ||
533 | if (BAD_MADT_ENTRY(nmi_src, end)) | |
534 | return -EINVAL; | |
535 | ||
536 | acpi_table_print_madt_entry(header); | |
537 | ||
538 | /* TBD: Support nimsrc entries? */ | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | #endif /* CONFIG_X86_IO_APIC */ | |
544 | ||
545 | /* | |
546 | * acpi_pic_sci_set_trigger() | |
547 | * | |
548 | * use ELCR to set PIC-mode trigger type for SCI | |
549 | * | |
550 | * If a PIC-mode SCI is not recognized or gives spurious IRQ7's | |
551 | * it may require Edge Trigger -- use "acpi_sci=edge" | |
552 | * | |
553 | * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers | |
554 | * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. | |
555 | * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) | |
556 | * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) | |
557 | */ | |
558 | ||
559 | void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) | |
560 | { | |
561 | unsigned int mask = 1 << irq; | |
562 | unsigned int old, new; | |
563 | ||
564 | /* Real old ELCR mask */ | |
565 | old = inb(0x4d0) | (inb(0x4d1) << 8); | |
566 | ||
567 | /* | |
568 | * If we use ACPI to set PCI IRQs, then we should clear ELCR | |
569 | * since we will set it correctly as we enable the PCI irq | |
570 | * routing. | |
571 | */ | |
572 | new = acpi_noirq ? old : 0; | |
573 | ||
574 | /* | |
575 | * Update SCI information in the ELCR, it isn't in the PCI | |
576 | * routing tables.. | |
577 | */ | |
578 | switch (trigger) { | |
579 | case 1: /* Edge - clear */ | |
580 | new &= ~mask; | |
581 | break; | |
582 | case 3: /* Level - set */ | |
583 | new |= mask; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (old == new) | |
588 | return; | |
589 | ||
590 | printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); | |
591 | outb(new, 0x4d0); | |
592 | outb(new >> 8, 0x4d1); | |
593 | } | |
594 | ||
595 | int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) | |
596 | { | |
597 | int rc, irq, trigger, polarity; | |
598 | ||
599 | if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { | |
600 | *irqp = gsi; | |
601 | return 0; | |
602 | } | |
603 | ||
604 | rc = acpi_get_override_irq(gsi, &trigger, &polarity); | |
605 | if (rc == 0) { | |
606 | trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; | |
607 | polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; | |
608 | irq = acpi_register_gsi(NULL, gsi, trigger, polarity); | |
609 | if (irq >= 0) { | |
610 | *irqp = irq; | |
611 | return 0; | |
612 | } | |
613 | } | |
614 | ||
615 | return -1; | |
616 | } | |
617 | EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); | |
618 | ||
619 | int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) | |
620 | { | |
621 | if (isa_irq < nr_legacy_irqs() && | |
622 | isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { | |
623 | *gsi = isa_irq_to_gsi[isa_irq]; | |
624 | return 0; | |
625 | } | |
626 | ||
627 | return -1; | |
628 | } | |
629 | ||
630 | static int acpi_register_gsi_pic(struct device *dev, u32 gsi, | |
631 | int trigger, int polarity) | |
632 | { | |
633 | #ifdef CONFIG_PCI | |
634 | /* | |
635 | * Make sure all (legacy) PCI IRQs are set as level-triggered. | |
636 | */ | |
637 | if (trigger == ACPI_LEVEL_SENSITIVE) | |
638 | elcr_set_level_irq(gsi); | |
639 | #endif | |
640 | ||
641 | return gsi; | |
642 | } | |
643 | ||
644 | #ifdef CONFIG_X86_LOCAL_APIC | |
645 | static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, | |
646 | int trigger, int polarity) | |
647 | { | |
648 | int irq = gsi; | |
649 | #ifdef CONFIG_X86_IO_APIC | |
650 | int node; | |
651 | struct irq_alloc_info info; | |
652 | ||
653 | node = dev ? dev_to_node(dev) : NUMA_NO_NODE; | |
654 | trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; | |
655 | polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; | |
656 | ioapic_set_alloc_attr(&info, node, trigger, polarity); | |
657 | ||
658 | mutex_lock(&acpi_ioapic_lock); | |
659 | irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); | |
660 | /* Don't set up the ACPI SCI because it's already set up */ | |
661 | if (irq >= 0 && enable_update_mptable && | |
662 | acpi_gbl_FADT.sci_interrupt != gsi) | |
663 | mp_config_acpi_gsi(dev, gsi, trigger, polarity); | |
664 | mutex_unlock(&acpi_ioapic_lock); | |
665 | #endif | |
666 | ||
667 | return irq; | |
668 | } | |
669 | ||
670 | static void acpi_unregister_gsi_ioapic(u32 gsi) | |
671 | { | |
672 | #ifdef CONFIG_X86_IO_APIC | |
673 | int irq; | |
674 | ||
675 | mutex_lock(&acpi_ioapic_lock); | |
676 | irq = mp_map_gsi_to_irq(gsi, 0, NULL); | |
677 | if (irq > 0) | |
678 | mp_unmap_irq(irq); | |
679 | mutex_unlock(&acpi_ioapic_lock); | |
680 | #endif | |
681 | } | |
682 | #endif | |
683 | ||
684 | int (*__acpi_register_gsi)(struct device *dev, u32 gsi, | |
685 | int trigger, int polarity) = acpi_register_gsi_pic; | |
686 | void (*__acpi_unregister_gsi)(u32 gsi) = NULL; | |
687 | ||
688 | #ifdef CONFIG_ACPI_SLEEP | |
689 | int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; | |
690 | #else | |
691 | int (*acpi_suspend_lowlevel)(void); | |
692 | #endif | |
693 | ||
694 | /* | |
695 | * success: return IRQ number (>=0) | |
696 | * failure: return < 0 | |
697 | */ | |
698 | int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) | |
699 | { | |
700 | return __acpi_register_gsi(dev, gsi, trigger, polarity); | |
701 | } | |
702 | EXPORT_SYMBOL_GPL(acpi_register_gsi); | |
703 | ||
704 | void acpi_unregister_gsi(u32 gsi) | |
705 | { | |
706 | if (__acpi_unregister_gsi) | |
707 | __acpi_unregister_gsi(gsi); | |
708 | } | |
709 | EXPORT_SYMBOL_GPL(acpi_unregister_gsi); | |
710 | ||
711 | #ifdef CONFIG_X86_LOCAL_APIC | |
712 | static void __init acpi_set_irq_model_ioapic(void) | |
713 | { | |
714 | acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; | |
715 | __acpi_register_gsi = acpi_register_gsi_ioapic; | |
716 | __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; | |
717 | acpi_ioapic = 1; | |
718 | } | |
719 | #endif | |
720 | ||
721 | /* | |
722 | * ACPI based hotplug support for CPU | |
723 | */ | |
724 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
725 | #include <acpi/processor.h> | |
726 | ||
727 | static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) | |
728 | { | |
729 | #ifdef CONFIG_ACPI_NUMA | |
730 | int nid; | |
731 | ||
732 | nid = acpi_get_node(handle); | |
733 | if (nid != NUMA_NO_NODE) { | |
734 | set_apicid_to_node(physid, nid); | |
735 | numa_set_node(cpu, nid); | |
736 | } | |
737 | #endif | |
738 | return 0; | |
739 | } | |
740 | ||
741 | int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, | |
742 | int *pcpu) | |
743 | { | |
744 | int cpu; | |
745 | ||
746 | cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); | |
747 | if (cpu < 0) { | |
748 | pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); | |
749 | return cpu; | |
750 | } | |
751 | ||
752 | acpi_processor_set_pdc(handle); | |
753 | acpi_map_cpu2node(handle, cpu, physid); | |
754 | ||
755 | *pcpu = cpu; | |
756 | return 0; | |
757 | } | |
758 | EXPORT_SYMBOL(acpi_map_cpu); | |
759 | ||
760 | int acpi_unmap_cpu(int cpu) | |
761 | { | |
762 | #ifdef CONFIG_ACPI_NUMA | |
763 | set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); | |
764 | #endif | |
765 | ||
766 | per_cpu(x86_cpu_to_apicid, cpu) = -1; | |
767 | set_cpu_present(cpu, false); | |
768 | num_processors--; | |
769 | ||
770 | return (0); | |
771 | } | |
772 | EXPORT_SYMBOL(acpi_unmap_cpu); | |
773 | #endif /* CONFIG_ACPI_HOTPLUG_CPU */ | |
774 | ||
775 | int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) | |
776 | { | |
777 | int ret = -ENOSYS; | |
778 | #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC | |
779 | int ioapic_id; | |
780 | u64 addr; | |
781 | struct ioapic_domain_cfg cfg = { | |
782 | .type = IOAPIC_DOMAIN_DYNAMIC, | |
783 | .ops = &mp_ioapic_irqdomain_ops, | |
784 | }; | |
785 | ||
786 | ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); | |
787 | if (ioapic_id < 0) { | |
788 | unsigned long long uid; | |
789 | acpi_status status; | |
790 | ||
791 | status = acpi_evaluate_integer(handle, METHOD_NAME__UID, | |
792 | NULL, &uid); | |
793 | if (ACPI_FAILURE(status)) { | |
794 | acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); | |
795 | return -EINVAL; | |
796 | } | |
797 | ioapic_id = (int)uid; | |
798 | } | |
799 | ||
800 | mutex_lock(&acpi_ioapic_lock); | |
801 | ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); | |
802 | mutex_unlock(&acpi_ioapic_lock); | |
803 | #endif | |
804 | ||
805 | return ret; | |
806 | } | |
807 | EXPORT_SYMBOL(acpi_register_ioapic); | |
808 | ||
809 | int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) | |
810 | { | |
811 | int ret = -ENOSYS; | |
812 | ||
813 | #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC | |
814 | mutex_lock(&acpi_ioapic_lock); | |
815 | ret = mp_unregister_ioapic(gsi_base); | |
816 | mutex_unlock(&acpi_ioapic_lock); | |
817 | #endif | |
818 | ||
819 | return ret; | |
820 | } | |
821 | EXPORT_SYMBOL(acpi_unregister_ioapic); | |
822 | ||
823 | /** | |
824 | * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base | |
825 | * has been registered | |
826 | * @handle: ACPI handle of the IOAPIC deivce | |
827 | * @gsi_base: GSI base associated with the IOAPIC | |
828 | * | |
829 | * Assume caller holds some type of lock to serialize acpi_ioapic_registered() | |
830 | * with acpi_register_ioapic()/acpi_unregister_ioapic(). | |
831 | */ | |
832 | int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) | |
833 | { | |
834 | int ret = 0; | |
835 | ||
836 | #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC | |
837 | mutex_lock(&acpi_ioapic_lock); | |
838 | ret = mp_ioapic_registered(gsi_base); | |
839 | mutex_unlock(&acpi_ioapic_lock); | |
840 | #endif | |
841 | ||
842 | return ret; | |
843 | } | |
844 | ||
845 | static int __init acpi_parse_sbf(struct acpi_table_header *table) | |
846 | { | |
847 | struct acpi_table_boot *sb = (struct acpi_table_boot *)table; | |
848 | ||
849 | sbf_port = sb->cmos_index; /* Save CMOS port */ | |
850 | ||
851 | return 0; | |
852 | } | |
853 | ||
854 | #ifdef CONFIG_HPET_TIMER | |
855 | #include <asm/hpet.h> | |
856 | ||
857 | static struct resource *hpet_res __initdata; | |
858 | ||
859 | static int __init acpi_parse_hpet(struct acpi_table_header *table) | |
860 | { | |
861 | struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; | |
862 | ||
863 | if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { | |
864 | printk(KERN_WARNING PREFIX "HPET timers must be located in " | |
865 | "memory.\n"); | |
866 | return -1; | |
867 | } | |
868 | ||
869 | hpet_address = hpet_tbl->address.address; | |
870 | hpet_blockid = hpet_tbl->sequence; | |
871 | ||
872 | /* | |
873 | * Some broken BIOSes advertise HPET at 0x0. We really do not | |
874 | * want to allocate a resource there. | |
875 | */ | |
876 | if (!hpet_address) { | |
877 | printk(KERN_WARNING PREFIX | |
878 | "HPET id: %#x base: %#lx is invalid\n", | |
879 | hpet_tbl->id, hpet_address); | |
880 | return 0; | |
881 | } | |
882 | #ifdef CONFIG_X86_64 | |
883 | /* | |
884 | * Some even more broken BIOSes advertise HPET at | |
885 | * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add | |
886 | * some noise: | |
887 | */ | |
888 | if (hpet_address == 0xfed0000000000000UL) { | |
889 | if (!hpet_force_user) { | |
890 | printk(KERN_WARNING PREFIX "HPET id: %#x " | |
891 | "base: 0xfed0000000000000 is bogus\n " | |
892 | "try hpet=force on the kernel command line to " | |
893 | "fix it up to 0xfed00000.\n", hpet_tbl->id); | |
894 | hpet_address = 0; | |
895 | return 0; | |
896 | } | |
897 | printk(KERN_WARNING PREFIX | |
898 | "HPET id: %#x base: 0xfed0000000000000 fixed up " | |
899 | "to 0xfed00000.\n", hpet_tbl->id); | |
900 | hpet_address >>= 32; | |
901 | } | |
902 | #endif | |
903 | printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", | |
904 | hpet_tbl->id, hpet_address); | |
905 | ||
906 | /* | |
907 | * Allocate and initialize the HPET firmware resource for adding into | |
908 | * the resource tree during the lateinit timeframe. | |
909 | */ | |
910 | #define HPET_RESOURCE_NAME_SIZE 9 | |
911 | hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); | |
912 | ||
913 | hpet_res->name = (void *)&hpet_res[1]; | |
914 | hpet_res->flags = IORESOURCE_MEM; | |
915 | snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", | |
916 | hpet_tbl->sequence); | |
917 | ||
918 | hpet_res->start = hpet_address; | |
919 | hpet_res->end = hpet_address + (1 * 1024) - 1; | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | /* | |
925 | * hpet_insert_resource inserts the HPET resources used into the resource | |
926 | * tree. | |
927 | */ | |
928 | static __init int hpet_insert_resource(void) | |
929 | { | |
930 | if (!hpet_res) | |
931 | return 1; | |
932 | ||
933 | return insert_resource(&iomem_resource, hpet_res); | |
934 | } | |
935 | ||
936 | late_initcall(hpet_insert_resource); | |
937 | ||
938 | #else | |
939 | #define acpi_parse_hpet NULL | |
940 | #endif | |
941 | ||
942 | static int __init acpi_parse_fadt(struct acpi_table_header *table) | |
943 | { | |
944 | if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { | |
945 | pr_debug("ACPI: no legacy devices present\n"); | |
946 | x86_platform.legacy.devices.pnpbios = 0; | |
947 | } | |
948 | ||
949 | if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && | |
950 | !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && | |
951 | x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { | |
952 | pr_debug("ACPI: i8042 controller is absent\n"); | |
953 | x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; | |
954 | } | |
955 | ||
956 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { | |
957 | pr_debug("ACPI: not registering RTC platform device\n"); | |
958 | x86_platform.legacy.rtc = 0; | |
959 | } | |
960 | ||
961 | #ifdef CONFIG_X86_PM_TIMER | |
962 | /* detect the location of the ACPI PM Timer */ | |
963 | if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { | |
964 | /* FADT rev. 2 */ | |
965 | if (acpi_gbl_FADT.xpm_timer_block.space_id != | |
966 | ACPI_ADR_SPACE_SYSTEM_IO) | |
967 | return 0; | |
968 | ||
969 | pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; | |
970 | /* | |
971 | * "X" fields are optional extensions to the original V1.0 | |
972 | * fields, so we must selectively expand V1.0 fields if the | |
973 | * corresponding X field is zero. | |
974 | */ | |
975 | if (!pmtmr_ioport) | |
976 | pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; | |
977 | } else { | |
978 | /* FADT rev. 1 */ | |
979 | pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; | |
980 | } | |
981 | if (pmtmr_ioport) | |
982 | printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", | |
983 | pmtmr_ioport); | |
984 | #endif | |
985 | return 0; | |
986 | } | |
987 | ||
988 | #ifdef CONFIG_X86_LOCAL_APIC | |
989 | /* | |
990 | * Parse LAPIC entries in MADT | |
991 | * returns 0 on success, < 0 on error | |
992 | */ | |
993 | ||
994 | static int __init early_acpi_parse_madt_lapic_addr_ovr(void) | |
995 | { | |
996 | int count; | |
997 | ||
998 | if (!boot_cpu_has(X86_FEATURE_APIC)) | |
999 | return -ENODEV; | |
1000 | ||
1001 | /* | |
1002 | * Note that the LAPIC address is obtained from the MADT (32-bit value) | |
1003 | * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). | |
1004 | */ | |
1005 | ||
1006 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, | |
1007 | acpi_parse_lapic_addr_ovr, 0); | |
1008 | if (count < 0) { | |
1009 | printk(KERN_ERR PREFIX | |
1010 | "Error parsing LAPIC address override entry\n"); | |
1011 | return count; | |
1012 | } | |
1013 | ||
1014 | register_lapic_address(acpi_lapic_addr); | |
1015 | ||
1016 | return count; | |
1017 | } | |
1018 | ||
1019 | static int __init acpi_parse_madt_lapic_entries(void) | |
1020 | { | |
1021 | int count; | |
1022 | int x2count = 0; | |
1023 | int ret; | |
1024 | struct acpi_subtable_proc madt_proc[2]; | |
1025 | ||
1026 | if (!boot_cpu_has(X86_FEATURE_APIC)) | |
1027 | return -ENODEV; | |
1028 | ||
1029 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, | |
1030 | acpi_parse_sapic, MAX_LOCAL_APIC); | |
1031 | ||
1032 | if (!count) { | |
1033 | memset(madt_proc, 0, sizeof(madt_proc)); | |
1034 | madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; | |
1035 | madt_proc[0].handler = acpi_parse_lapic; | |
1036 | madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; | |
1037 | madt_proc[1].handler = acpi_parse_x2apic; | |
1038 | ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, | |
1039 | sizeof(struct acpi_table_madt), | |
1040 | madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); | |
1041 | if (ret < 0) { | |
1042 | printk(KERN_ERR PREFIX | |
1043 | "Error parsing LAPIC/X2APIC entries\n"); | |
1044 | return ret; | |
1045 | } | |
1046 | ||
1047 | count = madt_proc[0].count; | |
1048 | x2count = madt_proc[1].count; | |
1049 | } | |
1050 | if (!count && !x2count) { | |
1051 | printk(KERN_ERR PREFIX "No LAPIC entries present\n"); | |
1052 | /* TBD: Cleanup to allow fallback to MPS */ | |
1053 | return -ENODEV; | |
1054 | } else if (count < 0 || x2count < 0) { | |
1055 | printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); | |
1056 | /* TBD: Cleanup to allow fallback to MPS */ | |
1057 | return count; | |
1058 | } | |
1059 | ||
1060 | x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, | |
1061 | acpi_parse_x2apic_nmi, 0); | |
1062 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, | |
1063 | acpi_parse_lapic_nmi, 0); | |
1064 | if (count < 0 || x2count < 0) { | |
1065 | printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); | |
1066 | /* TBD: Cleanup to allow fallback to MPS */ | |
1067 | return count; | |
1068 | } | |
1069 | return 0; | |
1070 | } | |
1071 | #endif /* CONFIG_X86_LOCAL_APIC */ | |
1072 | ||
1073 | #ifdef CONFIG_X86_IO_APIC | |
1074 | static void __init mp_config_acpi_legacy_irqs(void) | |
1075 | { | |
1076 | int i; | |
1077 | struct mpc_intsrc mp_irq; | |
1078 | ||
1079 | #ifdef CONFIG_EISA | |
1080 | /* | |
1081 | * Fabricate the legacy ISA bus (bus #31). | |
1082 | */ | |
1083 | mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; | |
1084 | #endif | |
1085 | set_bit(MP_ISA_BUS, mp_bus_not_pci); | |
1086 | pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); | |
1087 | ||
1088 | /* | |
1089 | * Use the default configuration for the IRQs 0-15. Unless | |
1090 | * overridden by (MADT) interrupt source override entries. | |
1091 | */ | |
1092 | for (i = 0; i < nr_legacy_irqs(); i++) { | |
1093 | int ioapic, pin; | |
1094 | unsigned int dstapic; | |
1095 | int idx; | |
1096 | u32 gsi; | |
1097 | ||
1098 | /* Locate the gsi that irq i maps to. */ | |
1099 | if (acpi_isa_irq_to_gsi(i, &gsi)) | |
1100 | continue; | |
1101 | ||
1102 | /* | |
1103 | * Locate the IOAPIC that manages the ISA IRQ. | |
1104 | */ | |
1105 | ioapic = mp_find_ioapic(gsi); | |
1106 | if (ioapic < 0) | |
1107 | continue; | |
1108 | pin = mp_find_ioapic_pin(ioapic, gsi); | |
1109 | dstapic = mpc_ioapic_id(ioapic); | |
1110 | ||
1111 | for (idx = 0; idx < mp_irq_entries; idx++) { | |
1112 | struct mpc_intsrc *irq = mp_irqs + idx; | |
1113 | ||
1114 | /* Do we already have a mapping for this ISA IRQ? */ | |
1115 | if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) | |
1116 | break; | |
1117 | ||
1118 | /* Do we already have a mapping for this IOAPIC pin */ | |
1119 | if (irq->dstapic == dstapic && irq->dstirq == pin) | |
1120 | break; | |
1121 | } | |
1122 | ||
1123 | if (idx != mp_irq_entries) { | |
1124 | printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); | |
1125 | continue; /* IRQ already used */ | |
1126 | } | |
1127 | ||
1128 | mp_irq.type = MP_INTSRC; | |
1129 | mp_irq.irqflag = 0; /* Conforming */ | |
1130 | mp_irq.srcbus = MP_ISA_BUS; | |
1131 | mp_irq.dstapic = dstapic; | |
1132 | mp_irq.irqtype = mp_INT; | |
1133 | mp_irq.srcbusirq = i; /* Identity mapped */ | |
1134 | mp_irq.dstirq = pin; | |
1135 | ||
1136 | mp_save_irq(&mp_irq); | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Parse IOAPIC related entries in MADT | |
1142 | * returns 0 on success, < 0 on error | |
1143 | */ | |
1144 | static int __init acpi_parse_madt_ioapic_entries(void) | |
1145 | { | |
1146 | int count; | |
1147 | ||
1148 | /* | |
1149 | * ACPI interpreter is required to complete interrupt setup, | |
1150 | * so if it is off, don't enumerate the io-apics with ACPI. | |
1151 | * If MPS is present, it will handle them, | |
1152 | * otherwise the system will stay in PIC mode | |
1153 | */ | |
1154 | if (acpi_disabled || acpi_noirq) | |
1155 | return -ENODEV; | |
1156 | ||
1157 | if (!boot_cpu_has(X86_FEATURE_APIC)) | |
1158 | return -ENODEV; | |
1159 | ||
1160 | /* | |
1161 | * if "noapic" boot option, don't look for IO-APICs | |
1162 | */ | |
1163 | if (skip_ioapic_setup) { | |
1164 | printk(KERN_INFO PREFIX "Skipping IOAPIC probe " | |
1165 | "due to 'noapic' option.\n"); | |
1166 | return -ENODEV; | |
1167 | } | |
1168 | ||
1169 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, | |
1170 | MAX_IO_APICS); | |
1171 | if (!count) { | |
1172 | printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); | |
1173 | return -ENODEV; | |
1174 | } else if (count < 0) { | |
1175 | printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); | |
1176 | return count; | |
1177 | } | |
1178 | ||
1179 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, | |
1180 | acpi_parse_int_src_ovr, nr_irqs); | |
1181 | if (count < 0) { | |
1182 | printk(KERN_ERR PREFIX | |
1183 | "Error parsing interrupt source overrides entry\n"); | |
1184 | /* TBD: Cleanup to allow fallback to MPS */ | |
1185 | return count; | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | * If BIOS did not supply an INT_SRC_OVR for the SCI | |
1190 | * pretend we got one so we can set the SCI flags. | |
1191 | */ | |
1192 | if (!acpi_sci_override_gsi) | |
1193 | acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, | |
1194 | acpi_gbl_FADT.sci_interrupt); | |
1195 | ||
1196 | /* Fill in identity legacy mappings where no override */ | |
1197 | mp_config_acpi_legacy_irqs(); | |
1198 | ||
1199 | count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, | |
1200 | acpi_parse_nmi_src, nr_irqs); | |
1201 | if (count < 0) { | |
1202 | printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); | |
1203 | /* TBD: Cleanup to allow fallback to MPS */ | |
1204 | return count; | |
1205 | } | |
1206 | ||
1207 | return 0; | |
1208 | } | |
1209 | #else | |
1210 | static inline int acpi_parse_madt_ioapic_entries(void) | |
1211 | { | |
1212 | return -1; | |
1213 | } | |
1214 | #endif /* !CONFIG_X86_IO_APIC */ | |
1215 | ||
1216 | static void __init early_acpi_process_madt(void) | |
1217 | { | |
1218 | #ifdef CONFIG_X86_LOCAL_APIC | |
1219 | int error; | |
1220 | ||
1221 | if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { | |
1222 | ||
1223 | /* | |
1224 | * Parse MADT LAPIC entries | |
1225 | */ | |
1226 | error = early_acpi_parse_madt_lapic_addr_ovr(); | |
1227 | if (!error) { | |
1228 | acpi_lapic = 1; | |
1229 | smp_found_config = 1; | |
1230 | } | |
1231 | if (error == -EINVAL) { | |
1232 | /* | |
1233 | * Dell Precision Workstation 410, 610 come here. | |
1234 | */ | |
1235 | printk(KERN_ERR PREFIX | |
1236 | "Invalid BIOS MADT, disabling ACPI\n"); | |
1237 | disable_acpi(); | |
1238 | } | |
1239 | } | |
1240 | #endif | |
1241 | } | |
1242 | ||
1243 | static void __init acpi_process_madt(void) | |
1244 | { | |
1245 | #ifdef CONFIG_X86_LOCAL_APIC | |
1246 | int error; | |
1247 | ||
1248 | if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { | |
1249 | ||
1250 | /* | |
1251 | * Parse MADT LAPIC entries | |
1252 | */ | |
1253 | error = acpi_parse_madt_lapic_entries(); | |
1254 | if (!error) { | |
1255 | acpi_lapic = 1; | |
1256 | ||
1257 | /* | |
1258 | * Parse MADT IO-APIC entries | |
1259 | */ | |
1260 | mutex_lock(&acpi_ioapic_lock); | |
1261 | error = acpi_parse_madt_ioapic_entries(); | |
1262 | mutex_unlock(&acpi_ioapic_lock); | |
1263 | if (!error) { | |
1264 | acpi_set_irq_model_ioapic(); | |
1265 | ||
1266 | smp_found_config = 1; | |
1267 | } | |
1268 | } | |
1269 | if (error == -EINVAL) { | |
1270 | /* | |
1271 | * Dell Precision Workstation 410, 610 come here. | |
1272 | */ | |
1273 | printk(KERN_ERR PREFIX | |
1274 | "Invalid BIOS MADT, disabling ACPI\n"); | |
1275 | disable_acpi(); | |
1276 | } | |
1277 | } else { | |
1278 | /* | |
1279 | * ACPI found no MADT, and so ACPI wants UP PIC mode. | |
1280 | * In the event an MPS table was found, forget it. | |
1281 | * Boot with "acpi=off" to use MPS on such a system. | |
1282 | */ | |
1283 | if (smp_found_config) { | |
1284 | printk(KERN_WARNING PREFIX | |
1285 | "No APIC-table, disabling MPS\n"); | |
1286 | smp_found_config = 0; | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * ACPI supports both logical (e.g. Hyper-Threading) and physical | |
1292 | * processors, where MPS only supports physical. | |
1293 | */ | |
1294 | if (acpi_lapic && acpi_ioapic) | |
1295 | printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " | |
1296 | "information\n"); | |
1297 | else if (acpi_lapic) | |
1298 | printk(KERN_INFO "Using ACPI for processor (LAPIC) " | |
1299 | "configuration information\n"); | |
1300 | #endif | |
1301 | return; | |
1302 | } | |
1303 | ||
1304 | static int __init disable_acpi_irq(const struct dmi_system_id *d) | |
1305 | { | |
1306 | if (!acpi_force) { | |
1307 | printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", | |
1308 | d->ident); | |
1309 | acpi_noirq_set(); | |
1310 | } | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int __init disable_acpi_pci(const struct dmi_system_id *d) | |
1315 | { | |
1316 | if (!acpi_force) { | |
1317 | printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", | |
1318 | d->ident); | |
1319 | acpi_disable_pci(); | |
1320 | } | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | static int __init dmi_disable_acpi(const struct dmi_system_id *d) | |
1325 | { | |
1326 | if (!acpi_force) { | |
1327 | printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); | |
1328 | disable_acpi(); | |
1329 | } else { | |
1330 | printk(KERN_NOTICE | |
1331 | "Warning: DMI blacklist says broken, but acpi forced\n"); | |
1332 | } | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * Force ignoring BIOS IRQ0 override | |
1338 | */ | |
1339 | static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) | |
1340 | { | |
1341 | if (!acpi_skip_timer_override) { | |
1342 | pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", | |
1343 | d->ident); | |
1344 | acpi_skip_timer_override = 1; | |
1345 | } | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * ACPI offers an alternative platform interface model that removes | |
1351 | * ACPI hardware requirements for platforms that do not implement | |
1352 | * the PC Architecture. | |
1353 | * | |
1354 | * We initialize the Hardware-reduced ACPI model here: | |
1355 | */ | |
1356 | static void __init acpi_reduced_hw_init(void) | |
1357 | { | |
1358 | if (acpi_gbl_reduced_hardware) { | |
1359 | /* | |
1360 | * Override x86_init functions and bypass legacy pic | |
1361 | * in Hardware-reduced ACPI mode | |
1362 | */ | |
1363 | x86_init.timers.timer_init = x86_init_noop; | |
1364 | x86_init.irqs.pre_vector_init = x86_init_noop; | |
1365 | legacy_pic = &null_legacy_pic; | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * If your system is blacklisted here, but you find that acpi=force | |
1371 | * works for you, please contact linux-acpi@vger.kernel.org | |
1372 | */ | |
1373 | static struct dmi_system_id __initdata acpi_dmi_table[] = { | |
1374 | /* | |
1375 | * Boxes that need ACPI disabled | |
1376 | */ | |
1377 | { | |
1378 | .callback = dmi_disable_acpi, | |
1379 | .ident = "IBM Thinkpad", | |
1380 | .matches = { | |
1381 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), | |
1382 | DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), | |
1383 | }, | |
1384 | }, | |
1385 | ||
1386 | /* | |
1387 | * Boxes that need ACPI PCI IRQ routing disabled | |
1388 | */ | |
1389 | { | |
1390 | .callback = disable_acpi_irq, | |
1391 | .ident = "ASUS A7V", | |
1392 | .matches = { | |
1393 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), | |
1394 | DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), | |
1395 | /* newer BIOS, Revision 1011, does work */ | |
1396 | DMI_MATCH(DMI_BIOS_VERSION, | |
1397 | "ASUS A7V ACPI BIOS Revision 1007"), | |
1398 | }, | |
1399 | }, | |
1400 | { | |
1401 | /* | |
1402 | * Latest BIOS for IBM 600E (1.16) has bad pcinum | |
1403 | * for LPC bridge, which is needed for the PCI | |
1404 | * interrupt links to work. DSDT fix is in bug 5966. | |
1405 | * 2645, 2646 model numbers are shared with 600/600E/600X | |
1406 | */ | |
1407 | .callback = disable_acpi_irq, | |
1408 | .ident = "IBM Thinkpad 600 Series 2645", | |
1409 | .matches = { | |
1410 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), | |
1411 | DMI_MATCH(DMI_BOARD_NAME, "2645"), | |
1412 | }, | |
1413 | }, | |
1414 | { | |
1415 | .callback = disable_acpi_irq, | |
1416 | .ident = "IBM Thinkpad 600 Series 2646", | |
1417 | .matches = { | |
1418 | DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), | |
1419 | DMI_MATCH(DMI_BOARD_NAME, "2646"), | |
1420 | }, | |
1421 | }, | |
1422 | /* | |
1423 | * Boxes that need ACPI PCI IRQ routing and PCI scan disabled | |
1424 | */ | |
1425 | { /* _BBN 0 bug */ | |
1426 | .callback = disable_acpi_pci, | |
1427 | .ident = "ASUS PR-DLS", | |
1428 | .matches = { | |
1429 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
1430 | DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), | |
1431 | DMI_MATCH(DMI_BIOS_VERSION, | |
1432 | "ASUS PR-DLS ACPI BIOS Revision 1010"), | |
1433 | DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") | |
1434 | }, | |
1435 | }, | |
1436 | { | |
1437 | .callback = disable_acpi_pci, | |
1438 | .ident = "Acer TravelMate 36x Laptop", | |
1439 | .matches = { | |
1440 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), | |
1441 | DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), | |
1442 | }, | |
1443 | }, | |
1444 | {} | |
1445 | }; | |
1446 | ||
1447 | /* second table for DMI checks that should run after early-quirks */ | |
1448 | static struct dmi_system_id __initdata acpi_dmi_table_late[] = { | |
1449 | /* | |
1450 | * HP laptops which use a DSDT reporting as HP/SB400/10000, | |
1451 | * which includes some code which overrides all temperature | |
1452 | * trip points to 16C if the INTIN2 input of the I/O APIC | |
1453 | * is enabled. This input is incorrectly designated the | |
1454 | * ISA IRQ 0 via an interrupt source override even though | |
1455 | * it is wired to the output of the master 8259A and INTIN0 | |
1456 | * is not connected at all. Force ignoring BIOS IRQ0 | |
1457 | * override in that cases. | |
1458 | */ | |
1459 | { | |
1460 | .callback = dmi_ignore_irq0_timer_override, | |
1461 | .ident = "HP nx6115 laptop", | |
1462 | .matches = { | |
1463 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1464 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), | |
1465 | }, | |
1466 | }, | |
1467 | { | |
1468 | .callback = dmi_ignore_irq0_timer_override, | |
1469 | .ident = "HP NX6125 laptop", | |
1470 | .matches = { | |
1471 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1472 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), | |
1473 | }, | |
1474 | }, | |
1475 | { | |
1476 | .callback = dmi_ignore_irq0_timer_override, | |
1477 | .ident = "HP NX6325 laptop", | |
1478 | .matches = { | |
1479 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1480 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), | |
1481 | }, | |
1482 | }, | |
1483 | { | |
1484 | .callback = dmi_ignore_irq0_timer_override, | |
1485 | .ident = "HP 6715b laptop", | |
1486 | .matches = { | |
1487 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1488 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), | |
1489 | }, | |
1490 | }, | |
1491 | { | |
1492 | .callback = dmi_ignore_irq0_timer_override, | |
1493 | .ident = "FUJITSU SIEMENS", | |
1494 | .matches = { | |
1495 | DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), | |
1496 | DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), | |
1497 | }, | |
1498 | }, | |
1499 | {} | |
1500 | }; | |
1501 | ||
1502 | /* | |
1503 | * acpi_boot_table_init() and acpi_boot_init() | |
1504 | * called from setup_arch(), always. | |
1505 | * 1. checksums all tables | |
1506 | * 2. enumerates lapics | |
1507 | * 3. enumerates io-apics | |
1508 | * | |
1509 | * acpi_table_init() is separate to allow reading SRAT without | |
1510 | * other side effects. | |
1511 | * | |
1512 | * side effects of acpi_boot_init: | |
1513 | * acpi_lapic = 1 if LAPIC found | |
1514 | * acpi_ioapic = 1 if IOAPIC found | |
1515 | * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; | |
1516 | * if acpi_blacklisted() acpi_disabled = 1; | |
1517 | * acpi_irq_model=... | |
1518 | * ... | |
1519 | */ | |
1520 | ||
1521 | void __init acpi_boot_table_init(void) | |
1522 | { | |
1523 | dmi_check_system(acpi_dmi_table); | |
1524 | ||
1525 | /* | |
1526 | * If acpi_disabled, bail out | |
1527 | */ | |
1528 | if (acpi_disabled) | |
1529 | return; | |
1530 | ||
1531 | /* | |
1532 | * Initialize the ACPI boot-time table parser. | |
1533 | */ | |
1534 | if (acpi_table_init()) { | |
1535 | disable_acpi(); | |
1536 | return; | |
1537 | } | |
1538 | ||
1539 | acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); | |
1540 | ||
1541 | /* | |
1542 | * blacklist may disable ACPI entirely | |
1543 | */ | |
1544 | if (acpi_blacklisted()) { | |
1545 | if (acpi_force) { | |
1546 | printk(KERN_WARNING PREFIX "acpi=force override\n"); | |
1547 | } else { | |
1548 | printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); | |
1549 | disable_acpi(); | |
1550 | return; | |
1551 | } | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | int __init early_acpi_boot_init(void) | |
1556 | { | |
1557 | /* | |
1558 | * If acpi_disabled, bail out | |
1559 | */ | |
1560 | if (acpi_disabled) | |
1561 | return 1; | |
1562 | ||
1563 | /* | |
1564 | * Process the Multiple APIC Description Table (MADT), if present | |
1565 | */ | |
1566 | early_acpi_process_madt(); | |
1567 | ||
1568 | /* | |
1569 | * Hardware-reduced ACPI mode initialization: | |
1570 | */ | |
1571 | acpi_reduced_hw_init(); | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | int __init acpi_boot_init(void) | |
1577 | { | |
1578 | /* those are executed after early-quirks are executed */ | |
1579 | dmi_check_system(acpi_dmi_table_late); | |
1580 | ||
1581 | /* | |
1582 | * If acpi_disabled, bail out | |
1583 | */ | |
1584 | if (acpi_disabled) | |
1585 | return 1; | |
1586 | ||
1587 | acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); | |
1588 | ||
1589 | /* | |
1590 | * set sci_int and PM timer address | |
1591 | */ | |
1592 | acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); | |
1593 | ||
1594 | /* | |
1595 | * Process the Multiple APIC Description Table (MADT), if present | |
1596 | */ | |
1597 | acpi_process_madt(); | |
1598 | ||
1599 | acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); | |
1600 | if (IS_ENABLED(CONFIG_ACPI_BGRT)) | |
1601 | acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); | |
1602 | ||
1603 | if (!acpi_noirq) | |
1604 | x86_init.pci.init = pci_acpi_init; | |
1605 | ||
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | static int __init parse_acpi(char *arg) | |
1610 | { | |
1611 | if (!arg) | |
1612 | return -EINVAL; | |
1613 | ||
1614 | /* "acpi=off" disables both ACPI table parsing and interpreter */ | |
1615 | if (strcmp(arg, "off") == 0) { | |
1616 | disable_acpi(); | |
1617 | } | |
1618 | /* acpi=force to over-ride black-list */ | |
1619 | else if (strcmp(arg, "force") == 0) { | |
1620 | acpi_force = 1; | |
1621 | acpi_disabled = 0; | |
1622 | } | |
1623 | /* acpi=strict disables out-of-spec workarounds */ | |
1624 | else if (strcmp(arg, "strict") == 0) { | |
1625 | acpi_strict = 1; | |
1626 | } | |
1627 | /* acpi=rsdt use RSDT instead of XSDT */ | |
1628 | else if (strcmp(arg, "rsdt") == 0) { | |
1629 | acpi_gbl_do_not_use_xsdt = TRUE; | |
1630 | } | |
1631 | /* "acpi=noirq" disables ACPI interrupt routing */ | |
1632 | else if (strcmp(arg, "noirq") == 0) { | |
1633 | acpi_noirq_set(); | |
1634 | } | |
1635 | /* "acpi=copy_dsdt" copys DSDT */ | |
1636 | else if (strcmp(arg, "copy_dsdt") == 0) { | |
1637 | acpi_gbl_copy_dsdt_locally = 1; | |
1638 | } | |
1639 | /* "acpi=nocmcff" disables FF mode for corrected errors */ | |
1640 | else if (strcmp(arg, "nocmcff") == 0) { | |
1641 | acpi_disable_cmcff = 1; | |
1642 | } else { | |
1643 | /* Core will printk when we return error. */ | |
1644 | return -EINVAL; | |
1645 | } | |
1646 | return 0; | |
1647 | } | |
1648 | early_param("acpi", parse_acpi); | |
1649 | ||
1650 | /* FIXME: Using pci= for an ACPI parameter is a travesty. */ | |
1651 | static int __init parse_pci(char *arg) | |
1652 | { | |
1653 | if (arg && strcmp(arg, "noacpi") == 0) | |
1654 | acpi_disable_pci(); | |
1655 | return 0; | |
1656 | } | |
1657 | early_param("pci", parse_pci); | |
1658 | ||
1659 | int __init acpi_mps_check(void) | |
1660 | { | |
1661 | #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) | |
1662 | /* mptable code is not built-in*/ | |
1663 | if (acpi_disabled || acpi_noirq) { | |
1664 | printk(KERN_WARNING "MPS support code is not built-in.\n" | |
1665 | "Using acpi=off or acpi=noirq or pci=noacpi " | |
1666 | "may have problem\n"); | |
1667 | return 1; | |
1668 | } | |
1669 | #endif | |
1670 | return 0; | |
1671 | } | |
1672 | ||
1673 | #ifdef CONFIG_X86_IO_APIC | |
1674 | static int __init parse_acpi_skip_timer_override(char *arg) | |
1675 | { | |
1676 | acpi_skip_timer_override = 1; | |
1677 | return 0; | |
1678 | } | |
1679 | early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); | |
1680 | ||
1681 | static int __init parse_acpi_use_timer_override(char *arg) | |
1682 | { | |
1683 | acpi_use_timer_override = 1; | |
1684 | return 0; | |
1685 | } | |
1686 | early_param("acpi_use_timer_override", parse_acpi_use_timer_override); | |
1687 | #endif /* CONFIG_X86_IO_APIC */ | |
1688 | ||
1689 | static int __init setup_acpi_sci(char *s) | |
1690 | { | |
1691 | if (!s) | |
1692 | return -EINVAL; | |
1693 | if (!strcmp(s, "edge")) | |
1694 | acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | | |
1695 | (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); | |
1696 | else if (!strcmp(s, "level")) | |
1697 | acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | | |
1698 | (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); | |
1699 | else if (!strcmp(s, "high")) | |
1700 | acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | | |
1701 | (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); | |
1702 | else if (!strcmp(s, "low")) | |
1703 | acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | | |
1704 | (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); | |
1705 | else | |
1706 | return -EINVAL; | |
1707 | return 0; | |
1708 | } | |
1709 | early_param("acpi_sci", setup_acpi_sci); | |
1710 | ||
1711 | int __acpi_acquire_global_lock(unsigned int *lock) | |
1712 | { | |
1713 | unsigned int old, new, val; | |
1714 | do { | |
1715 | old = *lock; | |
1716 | new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); | |
1717 | val = cmpxchg(lock, old, new); | |
1718 | } while (unlikely (val != old)); | |
1719 | return (new < 3) ? -1 : 0; | |
1720 | } | |
1721 | ||
1722 | int __acpi_release_global_lock(unsigned int *lock) | |
1723 | { | |
1724 | unsigned int old, new, val; | |
1725 | do { | |
1726 | old = *lock; | |
1727 | new = old & ~0x3; | |
1728 | val = cmpxchg(lock, old, new); | |
1729 | } while (unlikely (val != old)); | |
1730 | return old & 0x1; | |
1731 | } | |
1732 | ||
1733 | void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) | |
1734 | { | |
1735 | e820__range_add(addr, size, E820_TYPE_ACPI); | |
1736 | e820__update_table_print(); | |
1737 | } |