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/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38
39 #include <asm/pci_x86.h>
40 #include <asm/pgtable.h>
41 #include <asm/io_apic.h>
42 #include <asm/apic.h>
43 #include <asm/io.h>
44 #include <asm/mpspec.h>
45 #include <asm/smp.h>
46
47 static int __initdata acpi_force = 0;
48 u32 acpi_rsdt_forced;
49 int acpi_disabled;
50 EXPORT_SYMBOL(acpi_disabled);
51
52 #ifdef CONFIG_X86_64
53 # include <asm/proto.h>
54 # include <asm/numa_64.h>
55 #endif /* X86 */
56
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61 #define PREFIX "ACPI: "
62
63 int acpi_noirq; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
66
67 int acpi_lapic;
68 int acpi_ioapic;
69 int acpi_strict;
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 #ifndef __HAVE_ARCH_CMPXCHG
82 #warning ACPI uses CMPXCHG, i486 and later hardware
83 #endif
84
85 /* --------------------------------------------------------------------------
86 Boot-time Configuration
87 -------------------------------------------------------------------------- */
88
89 /*
90 * The default interrupt routing model is PIC (8259). This gets
91 * overridden if IOAPICs are enumerated (below).
92 */
93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
94
95
96 /*
97 * ISA irqs by default are the first 16 gsis but can be
98 * any gsi as specified by an interrupt source override.
99 */
100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102 };
103
gsi_to_irq(unsigned int gsi)104 static unsigned int gsi_to_irq(unsigned int gsi)
105 {
106 unsigned int irq = gsi + NR_IRQS_LEGACY;
107 unsigned int i;
108
109 for (i = 0; i < NR_IRQS_LEGACY; i++) {
110 if (isa_irq_to_gsi[i] == gsi) {
111 return i;
112 }
113 }
114
115 /* Provide an identity mapping of gsi == irq
116 * except on truly weird platforms that have
117 * non isa irqs in the first 16 gsis.
118 */
119 if (gsi >= NR_IRQS_LEGACY)
120 irq = gsi;
121 else
122 irq = gsi_top + gsi;
123
124 return irq;
125 }
126
irq_to_gsi(int irq)127 static u32 irq_to_gsi(int irq)
128 {
129 unsigned int gsi;
130
131 if (irq < NR_IRQS_LEGACY)
132 gsi = isa_irq_to_gsi[irq];
133 else if (irq < gsi_top)
134 gsi = irq;
135 else if (irq < (gsi_top + NR_IRQS_LEGACY))
136 gsi = irq - gsi_top;
137 else
138 gsi = 0xffffffff;
139
140 return gsi;
141 }
142
143 /*
144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
145 * to map the target physical address. The problem is that set_fixmap()
146 * provides a single page, and it is possible that the page is not
147 * sufficient.
148 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
149 * i.e. until the next __va_range() call.
150 *
151 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
152 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
153 * count idx down while incrementing the phys address.
154 */
__acpi_map_table(unsigned long phys,unsigned long size)155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
156 {
157
158 if (!phys || !size)
159 return NULL;
160
161 return early_ioremap(phys, size);
162 }
__acpi_unmap_table(char * map,unsigned long size)163 void __init __acpi_unmap_table(char *map, unsigned long size)
164 {
165 if (!map || !size)
166 return;
167
168 early_iounmap(map, size);
169 }
170
171 #ifdef CONFIG_X86_LOCAL_APIC
acpi_parse_madt(struct acpi_table_header * table)172 static int __init acpi_parse_madt(struct acpi_table_header *table)
173 {
174 struct acpi_table_madt *madt = NULL;
175
176 if (!cpu_has_apic)
177 return -EINVAL;
178
179 madt = (struct acpi_table_madt *)table;
180 if (!madt) {
181 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
182 return -ENODEV;
183 }
184
185 if (madt->address) {
186 acpi_lapic_addr = (u64) madt->address;
187
188 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
189 madt->address);
190 }
191
192 default_acpi_madt_oem_check(madt->header.oem_id,
193 madt->header.oem_table_id);
194
195 return 0;
196 }
197
acpi_register_lapic(int id,u8 enabled)198 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
199 {
200 unsigned int ver = 0;
201
202 if (id >= (MAX_LOCAL_APIC-1)) {
203 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
204 return;
205 }
206
207 if (!enabled) {
208 ++disabled_cpus;
209 return;
210 }
211
212 if (boot_cpu_physical_apicid != -1U)
213 ver = apic_version[boot_cpu_physical_apicid];
214
215 generic_processor_info(id, ver);
216 }
217
218 static int __init
acpi_parse_x2apic(struct acpi_subtable_header * header,const unsigned long end)219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
220 {
221 struct acpi_madt_local_x2apic *processor = NULL;
222
223 processor = (struct acpi_madt_local_x2apic *)header;
224
225 if (BAD_MADT_ENTRY(processor, end))
226 return -EINVAL;
227
228 acpi_table_print_madt_entry(header);
229
230 #ifdef CONFIG_X86_X2APIC
231 /*
232 * We need to register disabled CPU as well to permit
233 * counting disabled CPUs. This allows us to size
234 * cpus_possible_map more accurately, to permit
235 * to not preallocating memory for all NR_CPUS
236 * when we use CPU hotplug.
237 */
238 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
239 processor->lapic_flags & ACPI_MADT_ENABLED);
240 #else
241 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
242 #endif
243
244 return 0;
245 }
246
247 static int __init
acpi_parse_lapic(struct acpi_subtable_header * header,const unsigned long end)248 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
249 {
250 struct acpi_madt_local_apic *processor = NULL;
251
252 processor = (struct acpi_madt_local_apic *)header;
253
254 if (BAD_MADT_ENTRY(processor, end))
255 return -EINVAL;
256
257 acpi_table_print_madt_entry(header);
258
259 /*
260 * We need to register disabled CPU as well to permit
261 * counting disabled CPUs. This allows us to size
262 * cpus_possible_map more accurately, to permit
263 * to not preallocating memory for all NR_CPUS
264 * when we use CPU hotplug.
265 */
266 acpi_register_lapic(processor->id, /* APIC ID */
267 processor->lapic_flags & ACPI_MADT_ENABLED);
268
269 return 0;
270 }
271
272 static int __init
acpi_parse_sapic(struct acpi_subtable_header * header,const unsigned long end)273 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
274 {
275 struct acpi_madt_local_sapic *processor = NULL;
276
277 processor = (struct acpi_madt_local_sapic *)header;
278
279 if (BAD_MADT_ENTRY(processor, end))
280 return -EINVAL;
281
282 acpi_table_print_madt_entry(header);
283
284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
285 processor->lapic_flags & ACPI_MADT_ENABLED);
286
287 return 0;
288 }
289
290 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
292 const unsigned long end)
293 {
294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
295
296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
297
298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
299 return -EINVAL;
300
301 acpi_lapic_addr = lapic_addr_ovr->address;
302
303 return 0;
304 }
305
306 static int __init
acpi_parse_x2apic_nmi(struct acpi_subtable_header * header,const unsigned long end)307 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
308 const unsigned long end)
309 {
310 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
311
312 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
313
314 if (BAD_MADT_ENTRY(x2apic_nmi, end))
315 return -EINVAL;
316
317 acpi_table_print_madt_entry(header);
318
319 if (x2apic_nmi->lint != 1)
320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
321
322 return 0;
323 }
324
325 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)326 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
327 {
328 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
329
330 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
331
332 if (BAD_MADT_ENTRY(lapic_nmi, end))
333 return -EINVAL;
334
335 acpi_table_print_madt_entry(header);
336
337 if (lapic_nmi->lint != 1)
338 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
339
340 return 0;
341 }
342
343 #endif /*CONFIG_X86_LOCAL_APIC */
344
345 #ifdef CONFIG_X86_IO_APIC
346
347 static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header,const unsigned long end)348 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
349 {
350 struct acpi_madt_io_apic *ioapic = NULL;
351
352 ioapic = (struct acpi_madt_io_apic *)header;
353
354 if (BAD_MADT_ENTRY(ioapic, end))
355 return -EINVAL;
356
357 acpi_table_print_madt_entry(header);
358
359 mp_register_ioapic(ioapic->id,
360 ioapic->address, ioapic->global_irq_base);
361
362 return 0;
363 }
364
365 /*
366 * Parse Interrupt Source Override for the ACPI SCI
367 */
acpi_sci_ioapic_setup(u8 bus_irq,u16 polarity,u16 trigger,u32 gsi)368 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
369 {
370 if (trigger == 0) /* compatible SCI trigger is level */
371 trigger = 3;
372
373 if (polarity == 0) /* compatible SCI polarity is low */
374 polarity = 3;
375
376 /* Command-line over-ride via acpi_sci= */
377 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
378 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
379
380 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
381 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
382
383 /*
384 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
385 * If GSI is < 16, this will update its flags,
386 * else it will create a new mp_irqs[] entry.
387 */
388 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
389
390 /*
391 * stash over-ride to indicate we've been here
392 * and for later update of acpi_gbl_FADT
393 */
394 acpi_sci_override_gsi = gsi;
395 return;
396 }
397
398 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)399 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
400 const unsigned long end)
401 {
402 struct acpi_madt_interrupt_override *intsrc = NULL;
403
404 intsrc = (struct acpi_madt_interrupt_override *)header;
405
406 if (BAD_MADT_ENTRY(intsrc, end))
407 return -EINVAL;
408
409 acpi_table_print_madt_entry(header);
410
411 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
412 acpi_sci_ioapic_setup(intsrc->source_irq,
413 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
414 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
415 intsrc->global_irq);
416 return 0;
417 }
418
419 if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
420 if (acpi_skip_timer_override) {
421 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
422 return 0;
423 }
424 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
425 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
426 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
427 }
428 }
429
430 mp_override_legacy_irq(intsrc->source_irq,
431 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
432 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
433 intsrc->global_irq);
434
435 return 0;
436 }
437
438 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)439 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
440 {
441 struct acpi_madt_nmi_source *nmi_src = NULL;
442
443 nmi_src = (struct acpi_madt_nmi_source *)header;
444
445 if (BAD_MADT_ENTRY(nmi_src, end))
446 return -EINVAL;
447
448 acpi_table_print_madt_entry(header);
449
450 /* TBD: Support nimsrc entries? */
451
452 return 0;
453 }
454
455 #endif /* CONFIG_X86_IO_APIC */
456
457 /*
458 * acpi_pic_sci_set_trigger()
459 *
460 * use ELCR to set PIC-mode trigger type for SCI
461 *
462 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
463 * it may require Edge Trigger -- use "acpi_sci=edge"
464 *
465 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
466 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
467 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
468 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
469 */
470
acpi_pic_sci_set_trigger(unsigned int irq,u16 trigger)471 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
472 {
473 unsigned int mask = 1 << irq;
474 unsigned int old, new;
475
476 /* Real old ELCR mask */
477 old = inb(0x4d0) | (inb(0x4d1) << 8);
478
479 /*
480 * If we use ACPI to set PCI IRQs, then we should clear ELCR
481 * since we will set it correctly as we enable the PCI irq
482 * routing.
483 */
484 new = acpi_noirq ? old : 0;
485
486 /*
487 * Update SCI information in the ELCR, it isn't in the PCI
488 * routing tables..
489 */
490 switch (trigger) {
491 case 1: /* Edge - clear */
492 new &= ~mask;
493 break;
494 case 3: /* Level - set */
495 new |= mask;
496 break;
497 }
498
499 if (old == new)
500 return;
501
502 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
503 outb(new, 0x4d0);
504 outb(new >> 8, 0x4d1);
505 }
506
acpi_gsi_to_irq(u32 gsi,unsigned int * irq)507 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
508 {
509 *irq = gsi_to_irq(gsi);
510
511 #ifdef CONFIG_X86_IO_APIC
512 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
513 setup_IO_APIC_irq_extra(gsi);
514 #endif
515
516 return 0;
517 }
518 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
519
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)520 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
521 {
522 if (isa_irq >= 16)
523 return -1;
524 *gsi = irq_to_gsi(isa_irq);
525 return 0;
526 }
527
acpi_register_gsi_pic(struct device * dev,u32 gsi,int trigger,int polarity)528 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
529 int trigger, int polarity)
530 {
531 #ifdef CONFIG_PCI
532 /*
533 * Make sure all (legacy) PCI IRQs are set as level-triggered.
534 */
535 if (trigger == ACPI_LEVEL_SENSITIVE)
536 eisa_set_level_irq(gsi);
537 #endif
538
539 return gsi;
540 }
541
acpi_register_gsi_ioapic(struct device * dev,u32 gsi,int trigger,int polarity)542 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
543 int trigger, int polarity)
544 {
545 #ifdef CONFIG_X86_IO_APIC
546 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
547 #endif
548
549 return gsi;
550 }
551
552 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
553 int trigger, int polarity) = acpi_register_gsi_pic;
554
555 /*
556 * success: return IRQ number (>=0)
557 * failure: return < 0
558 */
acpi_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)559 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
560 {
561 unsigned int irq;
562 unsigned int plat_gsi = gsi;
563
564 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
565 irq = gsi_to_irq(plat_gsi);
566
567 return irq;
568 }
569
acpi_set_irq_model_pic(void)570 void __init acpi_set_irq_model_pic(void)
571 {
572 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
573 __acpi_register_gsi = acpi_register_gsi_pic;
574 acpi_ioapic = 0;
575 }
576
acpi_set_irq_model_ioapic(void)577 void __init acpi_set_irq_model_ioapic(void)
578 {
579 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
580 __acpi_register_gsi = acpi_register_gsi_ioapic;
581 acpi_ioapic = 1;
582 }
583
584 /*
585 * ACPI based hotplug support for CPU
586 */
587 #ifdef CONFIG_ACPI_HOTPLUG_CPU
588 #include <acpi/processor.h>
589
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)590 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
591 {
592 #ifdef CONFIG_ACPI_NUMA
593 int nid;
594
595 nid = acpi_get_node(handle);
596 if (nid == -1 || !node_online(nid))
597 return;
598 set_apicid_to_node(physid, nid);
599 numa_set_node(cpu, nid);
600 #endif
601 }
602
_acpi_map_lsapic(acpi_handle handle,int * pcpu)603 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
604 {
605 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
606 union acpi_object *obj;
607 struct acpi_madt_local_apic *lapic;
608 cpumask_var_t tmp_map, new_map;
609 u8 physid;
610 int cpu;
611 int retval = -ENOMEM;
612
613 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
614 return -EINVAL;
615
616 if (!buffer.length || !buffer.pointer)
617 return -EINVAL;
618
619 obj = buffer.pointer;
620 if (obj->type != ACPI_TYPE_BUFFER ||
621 obj->buffer.length < sizeof(*lapic)) {
622 kfree(buffer.pointer);
623 return -EINVAL;
624 }
625
626 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
627
628 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
629 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
630 kfree(buffer.pointer);
631 return -EINVAL;
632 }
633
634 physid = lapic->id;
635
636 kfree(buffer.pointer);
637 buffer.length = ACPI_ALLOCATE_BUFFER;
638 buffer.pointer = NULL;
639
640 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
641 goto out;
642
643 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
644 goto free_tmp_map;
645
646 cpumask_copy(tmp_map, cpu_present_mask);
647 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
648
649 /*
650 * If mp_register_lapic successfully generates a new logical cpu
651 * number, then the following will get us exactly what was mapped
652 */
653 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
654 if (cpumask_empty(new_map)) {
655 printk ("Unable to map lapic to logical cpu number\n");
656 retval = -EINVAL;
657 goto free_new_map;
658 }
659
660 acpi_processor_set_pdc(handle);
661
662 cpu = cpumask_first(new_map);
663 acpi_map_cpu2node(handle, cpu, physid);
664
665 *pcpu = cpu;
666 retval = 0;
667
668 free_new_map:
669 free_cpumask_var(new_map);
670 free_tmp_map:
671 free_cpumask_var(tmp_map);
672 out:
673 return retval;
674 }
675
676 /* wrapper to silence section mismatch warning */
acpi_map_lsapic(acpi_handle handle,int * pcpu)677 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
678 {
679 return _acpi_map_lsapic(handle, pcpu);
680 }
681 EXPORT_SYMBOL(acpi_map_lsapic);
682
acpi_unmap_lsapic(int cpu)683 int acpi_unmap_lsapic(int cpu)
684 {
685 per_cpu(x86_cpu_to_apicid, cpu) = -1;
686 set_cpu_present(cpu, false);
687 num_processors--;
688
689 return (0);
690 }
691
692 EXPORT_SYMBOL(acpi_unmap_lsapic);
693 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
694
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)695 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
696 {
697 /* TBD */
698 return -EINVAL;
699 }
700
701 EXPORT_SYMBOL(acpi_register_ioapic);
702
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)703 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
704 {
705 /* TBD */
706 return -EINVAL;
707 }
708
709 EXPORT_SYMBOL(acpi_unregister_ioapic);
710
acpi_parse_sbf(struct acpi_table_header * table)711 static int __init acpi_parse_sbf(struct acpi_table_header *table)
712 {
713 struct acpi_table_boot *sb;
714
715 sb = (struct acpi_table_boot *)table;
716 if (!sb) {
717 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
718 return -ENODEV;
719 }
720
721 sbf_port = sb->cmos_index; /* Save CMOS port */
722
723 return 0;
724 }
725
726 #ifdef CONFIG_HPET_TIMER
727 #include <asm/hpet.h>
728
729 static struct __initdata resource *hpet_res;
730
acpi_parse_hpet(struct acpi_table_header * table)731 static int __init acpi_parse_hpet(struct acpi_table_header *table)
732 {
733 struct acpi_table_hpet *hpet_tbl;
734
735 hpet_tbl = (struct acpi_table_hpet *)table;
736 if (!hpet_tbl) {
737 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
738 return -ENODEV;
739 }
740
741 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
742 printk(KERN_WARNING PREFIX "HPET timers must be located in "
743 "memory.\n");
744 return -1;
745 }
746
747 hpet_address = hpet_tbl->address.address;
748 hpet_blockid = hpet_tbl->sequence;
749
750 /*
751 * Some broken BIOSes advertise HPET at 0x0. We really do not
752 * want to allocate a resource there.
753 */
754 if (!hpet_address) {
755 printk(KERN_WARNING PREFIX
756 "HPET id: %#x base: %#lx is invalid\n",
757 hpet_tbl->id, hpet_address);
758 return 0;
759 }
760 #ifdef CONFIG_X86_64
761 /*
762 * Some even more broken BIOSes advertise HPET at
763 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
764 * some noise:
765 */
766 if (hpet_address == 0xfed0000000000000UL) {
767 if (!hpet_force_user) {
768 printk(KERN_WARNING PREFIX "HPET id: %#x "
769 "base: 0xfed0000000000000 is bogus\n "
770 "try hpet=force on the kernel command line to "
771 "fix it up to 0xfed00000.\n", hpet_tbl->id);
772 hpet_address = 0;
773 return 0;
774 }
775 printk(KERN_WARNING PREFIX
776 "HPET id: %#x base: 0xfed0000000000000 fixed up "
777 "to 0xfed00000.\n", hpet_tbl->id);
778 hpet_address >>= 32;
779 }
780 #endif
781 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
782 hpet_tbl->id, hpet_address);
783
784 /*
785 * Allocate and initialize the HPET firmware resource for adding into
786 * the resource tree during the lateinit timeframe.
787 */
788 #define HPET_RESOURCE_NAME_SIZE 9
789 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
790
791 hpet_res->name = (void *)&hpet_res[1];
792 hpet_res->flags = IORESOURCE_MEM;
793 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
794 hpet_tbl->sequence);
795
796 hpet_res->start = hpet_address;
797 hpet_res->end = hpet_address + (1 * 1024) - 1;
798
799 return 0;
800 }
801
802 /*
803 * hpet_insert_resource inserts the HPET resources used into the resource
804 * tree.
805 */
hpet_insert_resource(void)806 static __init int hpet_insert_resource(void)
807 {
808 if (!hpet_res)
809 return 1;
810
811 return insert_resource(&iomem_resource, hpet_res);
812 }
813
814 late_initcall(hpet_insert_resource);
815
816 #else
817 #define acpi_parse_hpet NULL
818 #endif
819
acpi_parse_fadt(struct acpi_table_header * table)820 static int __init acpi_parse_fadt(struct acpi_table_header *table)
821 {
822
823 #ifdef CONFIG_X86_PM_TIMER
824 /* detect the location of the ACPI PM Timer */
825 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
826 /* FADT rev. 2 */
827 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
828 ACPI_ADR_SPACE_SYSTEM_IO)
829 return 0;
830
831 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
832 /*
833 * "X" fields are optional extensions to the original V1.0
834 * fields, so we must selectively expand V1.0 fields if the
835 * corresponding X field is zero.
836 */
837 if (!pmtmr_ioport)
838 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
839 } else {
840 /* FADT rev. 1 */
841 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
842 }
843 if (pmtmr_ioport)
844 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
845 pmtmr_ioport);
846 #endif
847 return 0;
848 }
849
850 #ifdef CONFIG_X86_LOCAL_APIC
851 /*
852 * Parse LAPIC entries in MADT
853 * returns 0 on success, < 0 on error
854 */
855
early_acpi_parse_madt_lapic_addr_ovr(void)856 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
857 {
858 int count;
859
860 if (!cpu_has_apic)
861 return -ENODEV;
862
863 /*
864 * Note that the LAPIC address is obtained from the MADT (32-bit value)
865 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
866 */
867
868 count =
869 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
870 acpi_parse_lapic_addr_ovr, 0);
871 if (count < 0) {
872 printk(KERN_ERR PREFIX
873 "Error parsing LAPIC address override entry\n");
874 return count;
875 }
876
877 register_lapic_address(acpi_lapic_addr);
878
879 return count;
880 }
881
acpi_parse_madt_lapic_entries(void)882 static int __init acpi_parse_madt_lapic_entries(void)
883 {
884 int count;
885 int x2count = 0;
886
887 if (!cpu_has_apic)
888 return -ENODEV;
889
890 /*
891 * Note that the LAPIC address is obtained from the MADT (32-bit value)
892 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
893 */
894
895 count =
896 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
897 acpi_parse_lapic_addr_ovr, 0);
898 if (count < 0) {
899 printk(KERN_ERR PREFIX
900 "Error parsing LAPIC address override entry\n");
901 return count;
902 }
903
904 register_lapic_address(acpi_lapic_addr);
905
906 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
907 acpi_parse_sapic, MAX_LOCAL_APIC);
908
909 if (!count) {
910 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
911 acpi_parse_x2apic, MAX_LOCAL_APIC);
912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
913 acpi_parse_lapic, MAX_LOCAL_APIC);
914 }
915 if (!count && !x2count) {
916 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
917 /* TBD: Cleanup to allow fallback to MPS */
918 return -ENODEV;
919 } else if (count < 0 || x2count < 0) {
920 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
921 /* TBD: Cleanup to allow fallback to MPS */
922 return count;
923 }
924
925 x2count =
926 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
927 acpi_parse_x2apic_nmi, 0);
928 count =
929 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
930 if (count < 0 || x2count < 0) {
931 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
932 /* TBD: Cleanup to allow fallback to MPS */
933 return count;
934 }
935 return 0;
936 }
937 #endif /* CONFIG_X86_LOCAL_APIC */
938
939 #ifdef CONFIG_X86_IO_APIC
940 #define MP_ISA_BUS 0
941
942 #ifdef CONFIG_X86_ES7000
943 extern int es7000_plat;
944 #endif
945
mp_override_legacy_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)946 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
947 {
948 int ioapic;
949 int pin;
950 struct mpc_intsrc mp_irq;
951
952 /*
953 * Convert 'gsi' to 'ioapic.pin'.
954 */
955 ioapic = mp_find_ioapic(gsi);
956 if (ioapic < 0)
957 return;
958 pin = mp_find_ioapic_pin(ioapic, gsi);
959
960 /*
961 * TBD: This check is for faulty timer entries, where the override
962 * erroneously sets the trigger to level, resulting in a HUGE
963 * increase of timer interrupts!
964 */
965 if ((bus_irq == 0) && (trigger == 3))
966 trigger = 1;
967
968 mp_irq.type = MP_INTSRC;
969 mp_irq.irqtype = mp_INT;
970 mp_irq.irqflag = (trigger << 2) | polarity;
971 mp_irq.srcbus = MP_ISA_BUS;
972 mp_irq.srcbusirq = bus_irq; /* IRQ */
973 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
974 mp_irq.dstirq = pin; /* INTIN# */
975
976 mp_save_irq(&mp_irq);
977
978 isa_irq_to_gsi[bus_irq] = gsi;
979 }
980
mp_config_acpi_legacy_irqs(void)981 void __init mp_config_acpi_legacy_irqs(void)
982 {
983 int i;
984 struct mpc_intsrc mp_irq;
985
986 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
987 /*
988 * Fabricate the legacy ISA bus (bus #31).
989 */
990 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
991 #endif
992 set_bit(MP_ISA_BUS, mp_bus_not_pci);
993 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
994
995 #ifdef CONFIG_X86_ES7000
996 /*
997 * Older generations of ES7000 have no legacy identity mappings
998 */
999 if (es7000_plat == 1)
1000 return;
1001 #endif
1002
1003 /*
1004 * Use the default configuration for the IRQs 0-15. Unless
1005 * overridden by (MADT) interrupt source override entries.
1006 */
1007 for (i = 0; i < 16; i++) {
1008 int ioapic, pin;
1009 unsigned int dstapic;
1010 int idx;
1011 u32 gsi;
1012
1013 /* Locate the gsi that irq i maps to. */
1014 if (acpi_isa_irq_to_gsi(i, &gsi))
1015 continue;
1016
1017 /*
1018 * Locate the IOAPIC that manages the ISA IRQ.
1019 */
1020 ioapic = mp_find_ioapic(gsi);
1021 if (ioapic < 0)
1022 continue;
1023 pin = mp_find_ioapic_pin(ioapic, gsi);
1024 dstapic = mp_ioapics[ioapic].apicid;
1025
1026 for (idx = 0; idx < mp_irq_entries; idx++) {
1027 struct mpc_intsrc *irq = mp_irqs + idx;
1028
1029 /* Do we already have a mapping for this ISA IRQ? */
1030 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1031 break;
1032
1033 /* Do we already have a mapping for this IOAPIC pin */
1034 if (irq->dstapic == dstapic && irq->dstirq == pin)
1035 break;
1036 }
1037
1038 if (idx != mp_irq_entries) {
1039 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1040 continue; /* IRQ already used */
1041 }
1042
1043 mp_irq.type = MP_INTSRC;
1044 mp_irq.irqflag = 0; /* Conforming */
1045 mp_irq.srcbus = MP_ISA_BUS;
1046 mp_irq.dstapic = dstapic;
1047 mp_irq.irqtype = mp_INT;
1048 mp_irq.srcbusirq = i; /* Identity mapped */
1049 mp_irq.dstirq = pin;
1050
1051 mp_save_irq(&mp_irq);
1052 }
1053 }
1054
mp_config_acpi_gsi(struct device * dev,u32 gsi,int trigger,int polarity)1055 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1056 int polarity)
1057 {
1058 #ifdef CONFIG_X86_MPPARSE
1059 struct mpc_intsrc mp_irq;
1060 struct pci_dev *pdev;
1061 unsigned char number;
1062 unsigned int devfn;
1063 int ioapic;
1064 u8 pin;
1065
1066 if (!acpi_ioapic)
1067 return 0;
1068 if (!dev)
1069 return 0;
1070 if (dev->bus != &pci_bus_type)
1071 return 0;
1072
1073 pdev = to_pci_dev(dev);
1074 number = pdev->bus->number;
1075 devfn = pdev->devfn;
1076 pin = pdev->pin;
1077 /* print the entry should happen on mptable identically */
1078 mp_irq.type = MP_INTSRC;
1079 mp_irq.irqtype = mp_INT;
1080 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1081 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1082 mp_irq.srcbus = number;
1083 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1084 ioapic = mp_find_ioapic(gsi);
1085 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1086 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1087
1088 mp_save_irq(&mp_irq);
1089 #endif
1090 return 0;
1091 }
1092
mp_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)1093 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1094 {
1095 int ioapic;
1096 int ioapic_pin;
1097 struct io_apic_irq_attr irq_attr;
1098
1099 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1100 return gsi;
1101
1102 /* Don't set up the ACPI SCI because it's already set up */
1103 if (acpi_gbl_FADT.sci_interrupt == gsi)
1104 return gsi;
1105
1106 ioapic = mp_find_ioapic(gsi);
1107 if (ioapic < 0) {
1108 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1109 return gsi;
1110 }
1111
1112 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1113
1114 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1115 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1116 "%d-%d\n", mp_ioapics[ioapic].apicid,
1117 ioapic_pin);
1118 return gsi;
1119 }
1120
1121 if (enable_update_mptable)
1122 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1123
1124 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1125 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1126 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1127 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1128
1129 return gsi;
1130 }
1131
1132 /*
1133 * Parse IOAPIC related entries in MADT
1134 * returns 0 on success, < 0 on error
1135 */
acpi_parse_madt_ioapic_entries(void)1136 static int __init acpi_parse_madt_ioapic_entries(void)
1137 {
1138 int count;
1139
1140 /*
1141 * ACPI interpreter is required to complete interrupt setup,
1142 * so if it is off, don't enumerate the io-apics with ACPI.
1143 * If MPS is present, it will handle them,
1144 * otherwise the system will stay in PIC mode
1145 */
1146 if (acpi_disabled || acpi_noirq)
1147 return -ENODEV;
1148
1149 if (!cpu_has_apic)
1150 return -ENODEV;
1151
1152 /*
1153 * if "noapic" boot option, don't look for IO-APICs
1154 */
1155 if (skip_ioapic_setup) {
1156 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1157 "due to 'noapic' option.\n");
1158 return -ENODEV;
1159 }
1160
1161 count =
1162 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1163 MAX_IO_APICS);
1164 if (!count) {
1165 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1166 return -ENODEV;
1167 } else if (count < 0) {
1168 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1169 return count;
1170 }
1171
1172 count =
1173 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1174 nr_irqs);
1175 if (count < 0) {
1176 printk(KERN_ERR PREFIX
1177 "Error parsing interrupt source overrides entry\n");
1178 /* TBD: Cleanup to allow fallback to MPS */
1179 return count;
1180 }
1181
1182 /*
1183 * If BIOS did not supply an INT_SRC_OVR for the SCI
1184 * pretend we got one so we can set the SCI flags.
1185 */
1186 if (!acpi_sci_override_gsi)
1187 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1188 acpi_gbl_FADT.sci_interrupt);
1189
1190 /* Fill in identity legacy mappings where no override */
1191 mp_config_acpi_legacy_irqs();
1192
1193 count =
1194 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1195 nr_irqs);
1196 if (count < 0) {
1197 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1198 /* TBD: Cleanup to allow fallback to MPS */
1199 return count;
1200 }
1201
1202 return 0;
1203 }
1204 #else
acpi_parse_madt_ioapic_entries(void)1205 static inline int acpi_parse_madt_ioapic_entries(void)
1206 {
1207 return -1;
1208 }
1209 #endif /* !CONFIG_X86_IO_APIC */
1210
early_acpi_process_madt(void)1211 static void __init early_acpi_process_madt(void)
1212 {
1213 #ifdef CONFIG_X86_LOCAL_APIC
1214 int error;
1215
1216 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1217
1218 /*
1219 * Parse MADT LAPIC entries
1220 */
1221 error = early_acpi_parse_madt_lapic_addr_ovr();
1222 if (!error) {
1223 acpi_lapic = 1;
1224 smp_found_config = 1;
1225 }
1226 if (error == -EINVAL) {
1227 /*
1228 * Dell Precision Workstation 410, 610 come here.
1229 */
1230 printk(KERN_ERR PREFIX
1231 "Invalid BIOS MADT, disabling ACPI\n");
1232 disable_acpi();
1233 }
1234 }
1235 #endif
1236 }
1237
acpi_process_madt(void)1238 static void __init acpi_process_madt(void)
1239 {
1240 #ifdef CONFIG_X86_LOCAL_APIC
1241 int error;
1242
1243 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1244
1245 /*
1246 * Parse MADT LAPIC entries
1247 */
1248 error = acpi_parse_madt_lapic_entries();
1249 if (!error) {
1250 acpi_lapic = 1;
1251
1252 /*
1253 * Parse MADT IO-APIC entries
1254 */
1255 error = acpi_parse_madt_ioapic_entries();
1256 if (!error) {
1257 acpi_set_irq_model_ioapic();
1258
1259 smp_found_config = 1;
1260 }
1261 }
1262 if (error == -EINVAL) {
1263 /*
1264 * Dell Precision Workstation 410, 610 come here.
1265 */
1266 printk(KERN_ERR PREFIX
1267 "Invalid BIOS MADT, disabling ACPI\n");
1268 disable_acpi();
1269 }
1270 } else {
1271 /*
1272 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1273 * In the event an MPS table was found, forget it.
1274 * Boot with "acpi=off" to use MPS on such a system.
1275 */
1276 if (smp_found_config) {
1277 printk(KERN_WARNING PREFIX
1278 "No APIC-table, disabling MPS\n");
1279 smp_found_config = 0;
1280 }
1281 }
1282
1283 /*
1284 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1285 * processors, where MPS only supports physical.
1286 */
1287 if (acpi_lapic && acpi_ioapic)
1288 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1289 "information\n");
1290 else if (acpi_lapic)
1291 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1292 "configuration information\n");
1293 #endif
1294 return;
1295 }
1296
disable_acpi_irq(const struct dmi_system_id * d)1297 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1298 {
1299 if (!acpi_force) {
1300 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1301 d->ident);
1302 acpi_noirq_set();
1303 }
1304 return 0;
1305 }
1306
disable_acpi_pci(const struct dmi_system_id * d)1307 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1308 {
1309 if (!acpi_force) {
1310 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1311 d->ident);
1312 acpi_disable_pci();
1313 }
1314 return 0;
1315 }
1316
dmi_disable_acpi(const struct dmi_system_id * d)1317 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1318 {
1319 if (!acpi_force) {
1320 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1321 disable_acpi();
1322 } else {
1323 printk(KERN_NOTICE
1324 "Warning: DMI blacklist says broken, but acpi forced\n");
1325 }
1326 return 0;
1327 }
1328
1329 /*
1330 * Force ignoring BIOS IRQ0 pin2 override
1331 */
dmi_ignore_irq0_timer_override(const struct dmi_system_id * d)1332 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1333 {
1334 /*
1335 * The ati_ixp4x0_rev() early PCI quirk should have set
1336 * the acpi_skip_timer_override flag already:
1337 */
1338 if (!acpi_skip_timer_override) {
1339 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1340 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1341 d->ident);
1342 acpi_skip_timer_override = 1;
1343 }
1344 return 0;
1345 }
1346
1347 /*
1348 * If your system is blacklisted here, but you find that acpi=force
1349 * works for you, please contact linux-acpi@vger.kernel.org
1350 */
1351 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1352 /*
1353 * Boxes that need ACPI disabled
1354 */
1355 {
1356 .callback = dmi_disable_acpi,
1357 .ident = "IBM Thinkpad",
1358 .matches = {
1359 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1360 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1361 },
1362 },
1363
1364 /*
1365 * Boxes that need ACPI PCI IRQ routing disabled
1366 */
1367 {
1368 .callback = disable_acpi_irq,
1369 .ident = "ASUS A7V",
1370 .matches = {
1371 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1372 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1373 /* newer BIOS, Revision 1011, does work */
1374 DMI_MATCH(DMI_BIOS_VERSION,
1375 "ASUS A7V ACPI BIOS Revision 1007"),
1376 },
1377 },
1378 {
1379 /*
1380 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1381 * for LPC bridge, which is needed for the PCI
1382 * interrupt links to work. DSDT fix is in bug 5966.
1383 * 2645, 2646 model numbers are shared with 600/600E/600X
1384 */
1385 .callback = disable_acpi_irq,
1386 .ident = "IBM Thinkpad 600 Series 2645",
1387 .matches = {
1388 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1389 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1390 },
1391 },
1392 {
1393 .callback = disable_acpi_irq,
1394 .ident = "IBM Thinkpad 600 Series 2646",
1395 .matches = {
1396 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1397 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1398 },
1399 },
1400 /*
1401 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1402 */
1403 { /* _BBN 0 bug */
1404 .callback = disable_acpi_pci,
1405 .ident = "ASUS PR-DLS",
1406 .matches = {
1407 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1408 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1409 DMI_MATCH(DMI_BIOS_VERSION,
1410 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1411 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1412 },
1413 },
1414 {
1415 .callback = disable_acpi_pci,
1416 .ident = "Acer TravelMate 36x Laptop",
1417 .matches = {
1418 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1419 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1420 },
1421 },
1422 {}
1423 };
1424
1425 /* second table for DMI checks that should run after early-quirks */
1426 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1427 /*
1428 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1429 * which includes some code which overrides all temperature
1430 * trip points to 16C if the INTIN2 input of the I/O APIC
1431 * is enabled. This input is incorrectly designated the
1432 * ISA IRQ 0 via an interrupt source override even though
1433 * it is wired to the output of the master 8259A and INTIN0
1434 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1435 * override in that cases.
1436 */
1437 {
1438 .callback = dmi_ignore_irq0_timer_override,
1439 .ident = "HP nx6115 laptop",
1440 .matches = {
1441 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1442 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1443 },
1444 },
1445 {
1446 .callback = dmi_ignore_irq0_timer_override,
1447 .ident = "HP NX6125 laptop",
1448 .matches = {
1449 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1450 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1451 },
1452 },
1453 {
1454 .callback = dmi_ignore_irq0_timer_override,
1455 .ident = "HP NX6325 laptop",
1456 .matches = {
1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1459 },
1460 },
1461 {
1462 .callback = dmi_ignore_irq0_timer_override,
1463 .ident = "HP 6715b laptop",
1464 .matches = {
1465 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1466 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1467 },
1468 },
1469 {}
1470 };
1471
1472 /*
1473 * acpi_boot_table_init() and acpi_boot_init()
1474 * called from setup_arch(), always.
1475 * 1. checksums all tables
1476 * 2. enumerates lapics
1477 * 3. enumerates io-apics
1478 *
1479 * acpi_table_init() is separate to allow reading SRAT without
1480 * other side effects.
1481 *
1482 * side effects of acpi_boot_init:
1483 * acpi_lapic = 1 if LAPIC found
1484 * acpi_ioapic = 1 if IOAPIC found
1485 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1486 * if acpi_blacklisted() acpi_disabled = 1;
1487 * acpi_irq_model=...
1488 * ...
1489 */
1490
acpi_boot_table_init(void)1491 void __init acpi_boot_table_init(void)
1492 {
1493 dmi_check_system(acpi_dmi_table);
1494
1495 /*
1496 * If acpi_disabled, bail out
1497 */
1498 if (acpi_disabled)
1499 return;
1500
1501 /*
1502 * Initialize the ACPI boot-time table parser.
1503 */
1504 if (acpi_table_init()) {
1505 disable_acpi();
1506 return;
1507 }
1508
1509 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1510
1511 /*
1512 * blacklist may disable ACPI entirely
1513 */
1514 if (acpi_blacklisted()) {
1515 if (acpi_force) {
1516 printk(KERN_WARNING PREFIX "acpi=force override\n");
1517 } else {
1518 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1519 disable_acpi();
1520 return;
1521 }
1522 }
1523 }
1524
early_acpi_boot_init(void)1525 int __init early_acpi_boot_init(void)
1526 {
1527 /*
1528 * If acpi_disabled, bail out
1529 */
1530 if (acpi_disabled)
1531 return 1;
1532
1533 /*
1534 * Process the Multiple APIC Description Table (MADT), if present
1535 */
1536 early_acpi_process_madt();
1537
1538 return 0;
1539 }
1540
acpi_boot_init(void)1541 int __init acpi_boot_init(void)
1542 {
1543 /* those are executed after early-quirks are executed */
1544 dmi_check_system(acpi_dmi_table_late);
1545
1546 /*
1547 * If acpi_disabled, bail out
1548 */
1549 if (acpi_disabled)
1550 return 1;
1551
1552 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1553
1554 /*
1555 * set sci_int and PM timer address
1556 */
1557 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1558
1559 /*
1560 * Process the Multiple APIC Description Table (MADT), if present
1561 */
1562 acpi_process_madt();
1563
1564 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1565
1566 if (!acpi_noirq)
1567 x86_init.pci.init = pci_acpi_init;
1568
1569 return 0;
1570 }
1571
parse_acpi(char * arg)1572 static int __init parse_acpi(char *arg)
1573 {
1574 if (!arg)
1575 return -EINVAL;
1576
1577 /* "acpi=off" disables both ACPI table parsing and interpreter */
1578 if (strcmp(arg, "off") == 0) {
1579 disable_acpi();
1580 }
1581 /* acpi=force to over-ride black-list */
1582 else if (strcmp(arg, "force") == 0) {
1583 acpi_force = 1;
1584 acpi_disabled = 0;
1585 }
1586 /* acpi=strict disables out-of-spec workarounds */
1587 else if (strcmp(arg, "strict") == 0) {
1588 acpi_strict = 1;
1589 }
1590 /* acpi=rsdt use RSDT instead of XSDT */
1591 else if (strcmp(arg, "rsdt") == 0) {
1592 acpi_rsdt_forced = 1;
1593 }
1594 /* "acpi=noirq" disables ACPI interrupt routing */
1595 else if (strcmp(arg, "noirq") == 0) {
1596 acpi_noirq_set();
1597 }
1598 /* "acpi=copy_dsdt" copys DSDT */
1599 else if (strcmp(arg, "copy_dsdt") == 0) {
1600 acpi_gbl_copy_dsdt_locally = 1;
1601 } else {
1602 /* Core will printk when we return error. */
1603 return -EINVAL;
1604 }
1605 return 0;
1606 }
1607 early_param("acpi", parse_acpi);
1608
1609 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
parse_pci(char * arg)1610 static int __init parse_pci(char *arg)
1611 {
1612 if (arg && strcmp(arg, "noacpi") == 0)
1613 acpi_disable_pci();
1614 return 0;
1615 }
1616 early_param("pci", parse_pci);
1617
acpi_mps_check(void)1618 int __init acpi_mps_check(void)
1619 {
1620 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1621 /* mptable code is not built-in*/
1622 if (acpi_disabled || acpi_noirq) {
1623 printk(KERN_WARNING "MPS support code is not built-in.\n"
1624 "Using acpi=off or acpi=noirq or pci=noacpi "
1625 "may have problem\n");
1626 return 1;
1627 }
1628 #endif
1629 return 0;
1630 }
1631
1632 #ifdef CONFIG_X86_IO_APIC
parse_acpi_skip_timer_override(char * arg)1633 static int __init parse_acpi_skip_timer_override(char *arg)
1634 {
1635 acpi_skip_timer_override = 1;
1636 return 0;
1637 }
1638 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1639
parse_acpi_use_timer_override(char * arg)1640 static int __init parse_acpi_use_timer_override(char *arg)
1641 {
1642 acpi_use_timer_override = 1;
1643 return 0;
1644 }
1645 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1646 #endif /* CONFIG_X86_IO_APIC */
1647
setup_acpi_sci(char * s)1648 static int __init setup_acpi_sci(char *s)
1649 {
1650 if (!s)
1651 return -EINVAL;
1652 if (!strcmp(s, "edge"))
1653 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1654 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1655 else if (!strcmp(s, "level"))
1656 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1657 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1658 else if (!strcmp(s, "high"))
1659 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1660 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1661 else if (!strcmp(s, "low"))
1662 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1663 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1664 else
1665 return -EINVAL;
1666 return 0;
1667 }
1668 early_param("acpi_sci", setup_acpi_sci);
1669
__acpi_acquire_global_lock(unsigned int * lock)1670 int __acpi_acquire_global_lock(unsigned int *lock)
1671 {
1672 unsigned int old, new, val;
1673 do {
1674 old = *lock;
1675 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1676 val = cmpxchg(lock, old, new);
1677 } while (unlikely (val != old));
1678 return (new < 3) ? -1 : 0;
1679 }
1680
__acpi_release_global_lock(unsigned int * lock)1681 int __acpi_release_global_lock(unsigned int *lock)
1682 {
1683 unsigned int old, new, val;
1684 do {
1685 old = *lock;
1686 new = old & ~0x3;
1687 val = cmpxchg(lock, old, new);
1688 } while (unlikely (val != old));
1689 return old & 0x1;
1690 }
1691