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 int apic_id;
223 u8 enabled;
224
225 processor = (struct acpi_madt_local_x2apic *)header;
226
227 if (BAD_MADT_ENTRY(processor, end))
228 return -EINVAL;
229
230 acpi_table_print_madt_entry(header);
231
232 apic_id = processor->local_apic_id;
233 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
234 #ifdef CONFIG_X86_X2APIC
235 /*
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
241 */
242 if (!cpu_has_x2apic && (apic_id >= 0xff) && enabled)
243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
244 else
245 acpi_register_lapic(apic_id, enabled);
246 #else
247 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
248 #endif
249
250 return 0;
251 }
252
253 static int __init
acpi_parse_lapic(struct acpi_subtable_header * header,const unsigned long end)254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
255 {
256 struct acpi_madt_local_apic *processor = NULL;
257
258 processor = (struct acpi_madt_local_apic *)header;
259
260 if (BAD_MADT_ENTRY(processor, end))
261 return -EINVAL;
262
263 acpi_table_print_madt_entry(header);
264
265 /*
266 * We need to register disabled CPU as well to permit
267 * counting disabled CPUs. This allows us to size
268 * cpus_possible_map more accurately, to permit
269 * to not preallocating memory for all NR_CPUS
270 * when we use CPU hotplug.
271 */
272 acpi_register_lapic(processor->id, /* APIC ID */
273 processor->lapic_flags & ACPI_MADT_ENABLED);
274
275 return 0;
276 }
277
278 static int __init
acpi_parse_sapic(struct acpi_subtable_header * header,const unsigned long end)279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
280 {
281 struct acpi_madt_local_sapic *processor = NULL;
282
283 processor = (struct acpi_madt_local_sapic *)header;
284
285 if (BAD_MADT_ENTRY(processor, end))
286 return -EINVAL;
287
288 acpi_table_print_madt_entry(header);
289
290 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
291 processor->lapic_flags & ACPI_MADT_ENABLED);
292
293 return 0;
294 }
295
296 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
298 const unsigned long end)
299 {
300 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
301
302 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
303
304 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
305 return -EINVAL;
306
307 acpi_lapic_addr = lapic_addr_ovr->address;
308
309 return 0;
310 }
311
312 static int __init
acpi_parse_x2apic_nmi(struct acpi_subtable_header * header,const unsigned long end)313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
314 const unsigned long end)
315 {
316 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
317
318 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
319
320 if (BAD_MADT_ENTRY(x2apic_nmi, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(header);
324
325 if (x2apic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327
328 return 0;
329 }
330
331 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
333 {
334 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
335
336 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
337
338 if (BAD_MADT_ENTRY(lapic_nmi, end))
339 return -EINVAL;
340
341 acpi_table_print_madt_entry(header);
342
343 if (lapic_nmi->lint != 1)
344 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
345
346 return 0;
347 }
348
349 #endif /*CONFIG_X86_LOCAL_APIC */
350
351 #ifdef CONFIG_X86_IO_APIC
352
353 static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header,const unsigned long end)354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
355 {
356 struct acpi_madt_io_apic *ioapic = NULL;
357
358 ioapic = (struct acpi_madt_io_apic *)header;
359
360 if (BAD_MADT_ENTRY(ioapic, end))
361 return -EINVAL;
362
363 acpi_table_print_madt_entry(header);
364
365 mp_register_ioapic(ioapic->id,
366 ioapic->address, ioapic->global_irq_base);
367
368 return 0;
369 }
370
371 /*
372 * Parse Interrupt Source Override for the ACPI SCI
373 */
acpi_sci_ioapic_setup(u8 bus_irq,u16 polarity,u16 trigger,u32 gsi)374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
375 {
376 if (trigger == 0) /* compatible SCI trigger is level */
377 trigger = 3;
378
379 if (polarity == 0) /* compatible SCI polarity is low */
380 polarity = 3;
381
382 /* Command-line over-ride via acpi_sci= */
383 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
384 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
385
386 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
387 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
388
389 /*
390 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
391 * If GSI is < 16, this will update its flags,
392 * else it will create a new mp_irqs[] entry.
393 */
394 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
395
396 /*
397 * stash over-ride to indicate we've been here
398 * and for later update of acpi_gbl_FADT
399 */
400 acpi_sci_override_gsi = gsi;
401 return;
402 }
403
404 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
406 const unsigned long end)
407 {
408 struct acpi_madt_interrupt_override *intsrc = NULL;
409
410 intsrc = (struct acpi_madt_interrupt_override *)header;
411
412 if (BAD_MADT_ENTRY(intsrc, end))
413 return -EINVAL;
414
415 acpi_table_print_madt_entry(header);
416
417 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
418 acpi_sci_ioapic_setup(intsrc->source_irq,
419 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
420 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
421 intsrc->global_irq);
422 return 0;
423 }
424
425 if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
426 if (acpi_skip_timer_override) {
427 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
428 return 0;
429 }
430 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
431 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
432 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
433 }
434 }
435
436 mp_override_legacy_irq(intsrc->source_irq,
437 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
438 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
439 intsrc->global_irq);
440
441 return 0;
442 }
443
444 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)445 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
446 {
447 struct acpi_madt_nmi_source *nmi_src = NULL;
448
449 nmi_src = (struct acpi_madt_nmi_source *)header;
450
451 if (BAD_MADT_ENTRY(nmi_src, end))
452 return -EINVAL;
453
454 acpi_table_print_madt_entry(header);
455
456 /* TBD: Support nimsrc entries? */
457
458 return 0;
459 }
460
461 #endif /* CONFIG_X86_IO_APIC */
462
463 /*
464 * acpi_pic_sci_set_trigger()
465 *
466 * use ELCR to set PIC-mode trigger type for SCI
467 *
468 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
469 * it may require Edge Trigger -- use "acpi_sci=edge"
470 *
471 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
472 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
473 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
474 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
475 */
476
acpi_pic_sci_set_trigger(unsigned int irq,u16 trigger)477 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
478 {
479 unsigned int mask = 1 << irq;
480 unsigned int old, new;
481
482 /* Real old ELCR mask */
483 old = inb(0x4d0) | (inb(0x4d1) << 8);
484
485 /*
486 * If we use ACPI to set PCI IRQs, then we should clear ELCR
487 * since we will set it correctly as we enable the PCI irq
488 * routing.
489 */
490 new = acpi_noirq ? old : 0;
491
492 /*
493 * Update SCI information in the ELCR, it isn't in the PCI
494 * routing tables..
495 */
496 switch (trigger) {
497 case 1: /* Edge - clear */
498 new &= ~mask;
499 break;
500 case 3: /* Level - set */
501 new |= mask;
502 break;
503 }
504
505 if (old == new)
506 return;
507
508 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
509 outb(new, 0x4d0);
510 outb(new >> 8, 0x4d1);
511 }
512
acpi_gsi_to_irq(u32 gsi,unsigned int * irq)513 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
514 {
515 *irq = gsi_to_irq(gsi);
516
517 #ifdef CONFIG_X86_IO_APIC
518 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
519 setup_IO_APIC_irq_extra(gsi);
520 #endif
521
522 return 0;
523 }
524 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
525
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)526 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
527 {
528 if (isa_irq >= 16)
529 return -1;
530 *gsi = irq_to_gsi(isa_irq);
531 return 0;
532 }
533
acpi_register_gsi_pic(struct device * dev,u32 gsi,int trigger,int polarity)534 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
535 int trigger, int polarity)
536 {
537 #ifdef CONFIG_PCI
538 /*
539 * Make sure all (legacy) PCI IRQs are set as level-triggered.
540 */
541 if (trigger == ACPI_LEVEL_SENSITIVE)
542 eisa_set_level_irq(gsi);
543 #endif
544
545 return gsi;
546 }
547
acpi_register_gsi_ioapic(struct device * dev,u32 gsi,int trigger,int polarity)548 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
549 int trigger, int polarity)
550 {
551 #ifdef CONFIG_X86_IO_APIC
552 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
553 #endif
554
555 return gsi;
556 }
557
558 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
559 int trigger, int polarity) = acpi_register_gsi_pic;
560
561 /*
562 * success: return IRQ number (>=0)
563 * failure: return < 0
564 */
acpi_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)565 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
566 {
567 unsigned int irq;
568 unsigned int plat_gsi = gsi;
569
570 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
571 irq = gsi_to_irq(plat_gsi);
572
573 return irq;
574 }
575
acpi_set_irq_model_pic(void)576 void __init acpi_set_irq_model_pic(void)
577 {
578 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
579 __acpi_register_gsi = acpi_register_gsi_pic;
580 acpi_ioapic = 0;
581 }
582
acpi_set_irq_model_ioapic(void)583 void __init acpi_set_irq_model_ioapic(void)
584 {
585 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
586 __acpi_register_gsi = acpi_register_gsi_ioapic;
587 acpi_ioapic = 1;
588 }
589
590 /*
591 * ACPI based hotplug support for CPU
592 */
593 #ifdef CONFIG_ACPI_HOTPLUG_CPU
594 #include <acpi/processor.h>
595
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)596 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
597 {
598 #ifdef CONFIG_ACPI_NUMA
599 int nid;
600
601 nid = acpi_get_node(handle);
602 if (nid == -1 || !node_online(nid))
603 return;
604 set_apicid_to_node(physid, nid);
605 numa_set_node(cpu, nid);
606 #endif
607 }
608
_acpi_map_lsapic(acpi_handle handle,int * pcpu)609 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
610 {
611 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
612 union acpi_object *obj;
613 struct acpi_madt_local_apic *lapic;
614 cpumask_var_t tmp_map, new_map;
615 u8 physid;
616 int cpu;
617 int retval = -ENOMEM;
618
619 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
620 return -EINVAL;
621
622 if (!buffer.length || !buffer.pointer)
623 return -EINVAL;
624
625 obj = buffer.pointer;
626 if (obj->type != ACPI_TYPE_BUFFER ||
627 obj->buffer.length < sizeof(*lapic)) {
628 kfree(buffer.pointer);
629 return -EINVAL;
630 }
631
632 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
633
634 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
635 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
636 kfree(buffer.pointer);
637 return -EINVAL;
638 }
639
640 physid = lapic->id;
641
642 kfree(buffer.pointer);
643 buffer.length = ACPI_ALLOCATE_BUFFER;
644 buffer.pointer = NULL;
645
646 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
647 goto out;
648
649 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
650 goto free_tmp_map;
651
652 cpumask_copy(tmp_map, cpu_present_mask);
653 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
654
655 /*
656 * If mp_register_lapic successfully generates a new logical cpu
657 * number, then the following will get us exactly what was mapped
658 */
659 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
660 if (cpumask_empty(new_map)) {
661 printk ("Unable to map lapic to logical cpu number\n");
662 retval = -EINVAL;
663 goto free_new_map;
664 }
665
666 acpi_processor_set_pdc(handle);
667
668 cpu = cpumask_first(new_map);
669 acpi_map_cpu2node(handle, cpu, physid);
670
671 *pcpu = cpu;
672 retval = 0;
673
674 free_new_map:
675 free_cpumask_var(new_map);
676 free_tmp_map:
677 free_cpumask_var(tmp_map);
678 out:
679 return retval;
680 }
681
682 /* wrapper to silence section mismatch warning */
acpi_map_lsapic(acpi_handle handle,int * pcpu)683 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
684 {
685 return _acpi_map_lsapic(handle, pcpu);
686 }
687 EXPORT_SYMBOL(acpi_map_lsapic);
688
acpi_unmap_lsapic(int cpu)689 int acpi_unmap_lsapic(int cpu)
690 {
691 per_cpu(x86_cpu_to_apicid, cpu) = -1;
692 set_cpu_present(cpu, false);
693 num_processors--;
694
695 return (0);
696 }
697
698 EXPORT_SYMBOL(acpi_unmap_lsapic);
699 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
700
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)701 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
702 {
703 /* TBD */
704 return -EINVAL;
705 }
706
707 EXPORT_SYMBOL(acpi_register_ioapic);
708
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)709 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
710 {
711 /* TBD */
712 return -EINVAL;
713 }
714
715 EXPORT_SYMBOL(acpi_unregister_ioapic);
716
acpi_parse_sbf(struct acpi_table_header * table)717 static int __init acpi_parse_sbf(struct acpi_table_header *table)
718 {
719 struct acpi_table_boot *sb;
720
721 sb = (struct acpi_table_boot *)table;
722 if (!sb) {
723 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
724 return -ENODEV;
725 }
726
727 sbf_port = sb->cmos_index; /* Save CMOS port */
728
729 return 0;
730 }
731
732 #ifdef CONFIG_HPET_TIMER
733 #include <asm/hpet.h>
734
735 static struct __initdata resource *hpet_res;
736
acpi_parse_hpet(struct acpi_table_header * table)737 static int __init acpi_parse_hpet(struct acpi_table_header *table)
738 {
739 struct acpi_table_hpet *hpet_tbl;
740
741 hpet_tbl = (struct acpi_table_hpet *)table;
742 if (!hpet_tbl) {
743 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
744 return -ENODEV;
745 }
746
747 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
748 printk(KERN_WARNING PREFIX "HPET timers must be located in "
749 "memory.\n");
750 return -1;
751 }
752
753 hpet_address = hpet_tbl->address.address;
754 hpet_blockid = hpet_tbl->sequence;
755
756 /*
757 * Some broken BIOSes advertise HPET at 0x0. We really do not
758 * want to allocate a resource there.
759 */
760 if (!hpet_address) {
761 printk(KERN_WARNING PREFIX
762 "HPET id: %#x base: %#lx is invalid\n",
763 hpet_tbl->id, hpet_address);
764 return 0;
765 }
766 #ifdef CONFIG_X86_64
767 /*
768 * Some even more broken BIOSes advertise HPET at
769 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
770 * some noise:
771 */
772 if (hpet_address == 0xfed0000000000000UL) {
773 if (!hpet_force_user) {
774 printk(KERN_WARNING PREFIX "HPET id: %#x "
775 "base: 0xfed0000000000000 is bogus\n "
776 "try hpet=force on the kernel command line to "
777 "fix it up to 0xfed00000.\n", hpet_tbl->id);
778 hpet_address = 0;
779 return 0;
780 }
781 printk(KERN_WARNING PREFIX
782 "HPET id: %#x base: 0xfed0000000000000 fixed up "
783 "to 0xfed00000.\n", hpet_tbl->id);
784 hpet_address >>= 32;
785 }
786 #endif
787 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
788 hpet_tbl->id, hpet_address);
789
790 /*
791 * Allocate and initialize the HPET firmware resource for adding into
792 * the resource tree during the lateinit timeframe.
793 */
794 #define HPET_RESOURCE_NAME_SIZE 9
795 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
796
797 hpet_res->name = (void *)&hpet_res[1];
798 hpet_res->flags = IORESOURCE_MEM;
799 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
800 hpet_tbl->sequence);
801
802 hpet_res->start = hpet_address;
803 hpet_res->end = hpet_address + (1 * 1024) - 1;
804
805 return 0;
806 }
807
808 /*
809 * hpet_insert_resource inserts the HPET resources used into the resource
810 * tree.
811 */
hpet_insert_resource(void)812 static __init int hpet_insert_resource(void)
813 {
814 if (!hpet_res)
815 return 1;
816
817 return insert_resource(&iomem_resource, hpet_res);
818 }
819
820 late_initcall(hpet_insert_resource);
821
822 #else
823 #define acpi_parse_hpet NULL
824 #endif
825
acpi_parse_fadt(struct acpi_table_header * table)826 static int __init acpi_parse_fadt(struct acpi_table_header *table)
827 {
828
829 #ifdef CONFIG_X86_PM_TIMER
830 /* detect the location of the ACPI PM Timer */
831 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
832 /* FADT rev. 2 */
833 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
834 ACPI_ADR_SPACE_SYSTEM_IO)
835 return 0;
836
837 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
838 /*
839 * "X" fields are optional extensions to the original V1.0
840 * fields, so we must selectively expand V1.0 fields if the
841 * corresponding X field is zero.
842 */
843 if (!pmtmr_ioport)
844 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
845 } else {
846 /* FADT rev. 1 */
847 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
848 }
849 if (pmtmr_ioport)
850 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
851 pmtmr_ioport);
852 #endif
853 return 0;
854 }
855
856 #ifdef CONFIG_X86_LOCAL_APIC
857 /*
858 * Parse LAPIC entries in MADT
859 * returns 0 on success, < 0 on error
860 */
861
early_acpi_parse_madt_lapic_addr_ovr(void)862 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
863 {
864 int count;
865
866 if (!cpu_has_apic)
867 return -ENODEV;
868
869 /*
870 * Note that the LAPIC address is obtained from the MADT (32-bit value)
871 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
872 */
873
874 count =
875 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
876 acpi_parse_lapic_addr_ovr, 0);
877 if (count < 0) {
878 printk(KERN_ERR PREFIX
879 "Error parsing LAPIC address override entry\n");
880 return count;
881 }
882
883 register_lapic_address(acpi_lapic_addr);
884
885 return count;
886 }
887
acpi_parse_madt_lapic_entries(void)888 static int __init acpi_parse_madt_lapic_entries(void)
889 {
890 int count;
891 int x2count = 0;
892
893 if (!cpu_has_apic)
894 return -ENODEV;
895
896 /*
897 * Note that the LAPIC address is obtained from the MADT (32-bit value)
898 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
899 */
900
901 count =
902 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
903 acpi_parse_lapic_addr_ovr, 0);
904 if (count < 0) {
905 printk(KERN_ERR PREFIX
906 "Error parsing LAPIC address override entry\n");
907 return count;
908 }
909
910 register_lapic_address(acpi_lapic_addr);
911
912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
913 acpi_parse_sapic, MAX_LOCAL_APIC);
914
915 if (!count) {
916 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
917 acpi_parse_x2apic, MAX_LOCAL_APIC);
918 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
919 acpi_parse_lapic, MAX_LOCAL_APIC);
920 }
921 if (!count && !x2count) {
922 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
923 /* TBD: Cleanup to allow fallback to MPS */
924 return -ENODEV;
925 } else if (count < 0 || x2count < 0) {
926 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
927 /* TBD: Cleanup to allow fallback to MPS */
928 return count;
929 }
930
931 x2count =
932 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
933 acpi_parse_x2apic_nmi, 0);
934 count =
935 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
936 if (count < 0 || x2count < 0) {
937 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
938 /* TBD: Cleanup to allow fallback to MPS */
939 return count;
940 }
941 return 0;
942 }
943 #endif /* CONFIG_X86_LOCAL_APIC */
944
945 #ifdef CONFIG_X86_IO_APIC
946 #define MP_ISA_BUS 0
947
948 #ifdef CONFIG_X86_ES7000
949 extern int es7000_plat;
950 #endif
951
mp_override_legacy_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)952 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
953 {
954 int ioapic;
955 int pin;
956 struct mpc_intsrc mp_irq;
957
958 /*
959 * Convert 'gsi' to 'ioapic.pin'.
960 */
961 ioapic = mp_find_ioapic(gsi);
962 if (ioapic < 0)
963 return;
964 pin = mp_find_ioapic_pin(ioapic, gsi);
965
966 /*
967 * TBD: This check is for faulty timer entries, where the override
968 * erroneously sets the trigger to level, resulting in a HUGE
969 * increase of timer interrupts!
970 */
971 if ((bus_irq == 0) && (trigger == 3))
972 trigger = 1;
973
974 mp_irq.type = MP_INTSRC;
975 mp_irq.irqtype = mp_INT;
976 mp_irq.irqflag = (trigger << 2) | polarity;
977 mp_irq.srcbus = MP_ISA_BUS;
978 mp_irq.srcbusirq = bus_irq; /* IRQ */
979 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
980 mp_irq.dstirq = pin; /* INTIN# */
981
982 mp_save_irq(&mp_irq);
983
984 isa_irq_to_gsi[bus_irq] = gsi;
985 }
986
mp_config_acpi_legacy_irqs(void)987 void __init mp_config_acpi_legacy_irqs(void)
988 {
989 int i;
990 struct mpc_intsrc mp_irq;
991
992 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
993 /*
994 * Fabricate the legacy ISA bus (bus #31).
995 */
996 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
997 #endif
998 set_bit(MP_ISA_BUS, mp_bus_not_pci);
999 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1000
1001 #ifdef CONFIG_X86_ES7000
1002 /*
1003 * Older generations of ES7000 have no legacy identity mappings
1004 */
1005 if (es7000_plat == 1)
1006 return;
1007 #endif
1008
1009 /*
1010 * Use the default configuration for the IRQs 0-15. Unless
1011 * overridden by (MADT) interrupt source override entries.
1012 */
1013 for (i = 0; i < 16; i++) {
1014 int ioapic, pin;
1015 unsigned int dstapic;
1016 int idx;
1017 u32 gsi;
1018
1019 /* Locate the gsi that irq i maps to. */
1020 if (acpi_isa_irq_to_gsi(i, &gsi))
1021 continue;
1022
1023 /*
1024 * Locate the IOAPIC that manages the ISA IRQ.
1025 */
1026 ioapic = mp_find_ioapic(gsi);
1027 if (ioapic < 0)
1028 continue;
1029 pin = mp_find_ioapic_pin(ioapic, gsi);
1030 dstapic = mpc_ioapic_id(ioapic);
1031
1032 for (idx = 0; idx < mp_irq_entries; idx++) {
1033 struct mpc_intsrc *irq = mp_irqs + idx;
1034
1035 /* Do we already have a mapping for this ISA IRQ? */
1036 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1037 break;
1038
1039 /* Do we already have a mapping for this IOAPIC pin */
1040 if (irq->dstapic == dstapic && irq->dstirq == pin)
1041 break;
1042 }
1043
1044 if (idx != mp_irq_entries) {
1045 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1046 continue; /* IRQ already used */
1047 }
1048
1049 mp_irq.type = MP_INTSRC;
1050 mp_irq.irqflag = 0; /* Conforming */
1051 mp_irq.srcbus = MP_ISA_BUS;
1052 mp_irq.dstapic = dstapic;
1053 mp_irq.irqtype = mp_INT;
1054 mp_irq.srcbusirq = i; /* Identity mapped */
1055 mp_irq.dstirq = pin;
1056
1057 mp_save_irq(&mp_irq);
1058 }
1059 }
1060
mp_config_acpi_gsi(struct device * dev,u32 gsi,int trigger,int polarity)1061 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1062 int polarity)
1063 {
1064 #ifdef CONFIG_X86_MPPARSE
1065 struct mpc_intsrc mp_irq;
1066 struct pci_dev *pdev;
1067 unsigned char number;
1068 unsigned int devfn;
1069 int ioapic;
1070 u8 pin;
1071
1072 if (!acpi_ioapic)
1073 return 0;
1074 if (!dev)
1075 return 0;
1076 if (dev->bus != &pci_bus_type)
1077 return 0;
1078
1079 pdev = to_pci_dev(dev);
1080 number = pdev->bus->number;
1081 devfn = pdev->devfn;
1082 pin = pdev->pin;
1083 /* print the entry should happen on mptable identically */
1084 mp_irq.type = MP_INTSRC;
1085 mp_irq.irqtype = mp_INT;
1086 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1087 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1088 mp_irq.srcbus = number;
1089 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1090 ioapic = mp_find_ioapic(gsi);
1091 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1092 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1093
1094 mp_save_irq(&mp_irq);
1095 #endif
1096 return 0;
1097 }
1098
mp_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)1099 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1100 {
1101 int ioapic;
1102 int ioapic_pin;
1103 struct io_apic_irq_attr irq_attr;
1104
1105 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1106 return gsi;
1107
1108 /* Don't set up the ACPI SCI because it's already set up */
1109 if (acpi_gbl_FADT.sci_interrupt == gsi)
1110 return gsi;
1111
1112 ioapic = mp_find_ioapic(gsi);
1113 if (ioapic < 0) {
1114 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1115 return gsi;
1116 }
1117
1118 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1119
1120 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1121 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1122 "%d-%d\n", mpc_ioapic_id(ioapic),
1123 ioapic_pin);
1124 return gsi;
1125 }
1126
1127 if (enable_update_mptable)
1128 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1129
1130 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1131 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1132 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1133 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1134
1135 return gsi;
1136 }
1137
1138 /*
1139 * Parse IOAPIC related entries in MADT
1140 * returns 0 on success, < 0 on error
1141 */
acpi_parse_madt_ioapic_entries(void)1142 static int __init acpi_parse_madt_ioapic_entries(void)
1143 {
1144 int count;
1145
1146 /*
1147 * ACPI interpreter is required to complete interrupt setup,
1148 * so if it is off, don't enumerate the io-apics with ACPI.
1149 * If MPS is present, it will handle them,
1150 * otherwise the system will stay in PIC mode
1151 */
1152 if (acpi_disabled || acpi_noirq)
1153 return -ENODEV;
1154
1155 if (!cpu_has_apic)
1156 return -ENODEV;
1157
1158 /*
1159 * if "noapic" boot option, don't look for IO-APICs
1160 */
1161 if (skip_ioapic_setup) {
1162 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1163 "due to 'noapic' option.\n");
1164 return -ENODEV;
1165 }
1166
1167 count =
1168 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1169 MAX_IO_APICS);
1170 if (!count) {
1171 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1172 return -ENODEV;
1173 } else if (count < 0) {
1174 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1175 return count;
1176 }
1177
1178 count =
1179 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1180 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 =
1200 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1201 nr_irqs);
1202 if (count < 0) {
1203 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1204 /* TBD: Cleanup to allow fallback to MPS */
1205 return count;
1206 }
1207
1208 return 0;
1209 }
1210 #else
acpi_parse_madt_ioapic_entries(void)1211 static inline int acpi_parse_madt_ioapic_entries(void)
1212 {
1213 return -1;
1214 }
1215 #endif /* !CONFIG_X86_IO_APIC */
1216
early_acpi_process_madt(void)1217 static void __init early_acpi_process_madt(void)
1218 {
1219 #ifdef CONFIG_X86_LOCAL_APIC
1220 int error;
1221
1222 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1223
1224 /*
1225 * Parse MADT LAPIC entries
1226 */
1227 error = early_acpi_parse_madt_lapic_addr_ovr();
1228 if (!error) {
1229 acpi_lapic = 1;
1230 smp_found_config = 1;
1231 }
1232 if (error == -EINVAL) {
1233 /*
1234 * Dell Precision Workstation 410, 610 come here.
1235 */
1236 printk(KERN_ERR PREFIX
1237 "Invalid BIOS MADT, disabling ACPI\n");
1238 disable_acpi();
1239 }
1240 }
1241 #endif
1242 }
1243
acpi_process_madt(void)1244 static void __init acpi_process_madt(void)
1245 {
1246 #ifdef CONFIG_X86_LOCAL_APIC
1247 int error;
1248
1249 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1250
1251 /*
1252 * Parse MADT LAPIC entries
1253 */
1254 error = acpi_parse_madt_lapic_entries();
1255 if (!error) {
1256 acpi_lapic = 1;
1257
1258 /*
1259 * Parse MADT IO-APIC entries
1260 */
1261 error = acpi_parse_madt_ioapic_entries();
1262 if (!error) {
1263 acpi_set_irq_model_ioapic();
1264
1265 smp_found_config = 1;
1266 }
1267 }
1268 if (error == -EINVAL) {
1269 /*
1270 * Dell Precision Workstation 410, 610 come here.
1271 */
1272 printk(KERN_ERR PREFIX
1273 "Invalid BIOS MADT, disabling ACPI\n");
1274 disable_acpi();
1275 }
1276 } else {
1277 /*
1278 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1279 * In the event an MPS table was found, forget it.
1280 * Boot with "acpi=off" to use MPS on such a system.
1281 */
1282 if (smp_found_config) {
1283 printk(KERN_WARNING PREFIX
1284 "No APIC-table, disabling MPS\n");
1285 smp_found_config = 0;
1286 }
1287 }
1288
1289 /*
1290 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1291 * processors, where MPS only supports physical.
1292 */
1293 if (acpi_lapic && acpi_ioapic)
1294 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1295 "information\n");
1296 else if (acpi_lapic)
1297 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1298 "configuration information\n");
1299 #endif
1300 return;
1301 }
1302
disable_acpi_irq(const struct dmi_system_id * d)1303 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1304 {
1305 if (!acpi_force) {
1306 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1307 d->ident);
1308 acpi_noirq_set();
1309 }
1310 return 0;
1311 }
1312
disable_acpi_pci(const struct dmi_system_id * d)1313 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1314 {
1315 if (!acpi_force) {
1316 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1317 d->ident);
1318 acpi_disable_pci();
1319 }
1320 return 0;
1321 }
1322
dmi_disable_acpi(const struct dmi_system_id * d)1323 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1324 {
1325 if (!acpi_force) {
1326 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1327 disable_acpi();
1328 } else {
1329 printk(KERN_NOTICE
1330 "Warning: DMI blacklist says broken, but acpi forced\n");
1331 }
1332 return 0;
1333 }
1334
1335 /*
1336 * Force ignoring BIOS IRQ0 pin2 override
1337 */
dmi_ignore_irq0_timer_override(const struct dmi_system_id * d)1338 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1339 {
1340 /*
1341 * The ati_ixp4x0_rev() early PCI quirk should have set
1342 * the acpi_skip_timer_override flag already:
1343 */
1344 if (!acpi_skip_timer_override) {
1345 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1346 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1347 d->ident);
1348 acpi_skip_timer_override = 1;
1349 }
1350 return 0;
1351 }
1352
1353 /*
1354 * If your system is blacklisted here, but you find that acpi=force
1355 * works for you, please contact linux-acpi@vger.kernel.org
1356 */
1357 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1358 /*
1359 * Boxes that need ACPI disabled
1360 */
1361 {
1362 .callback = dmi_disable_acpi,
1363 .ident = "IBM Thinkpad",
1364 .matches = {
1365 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1366 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1367 },
1368 },
1369
1370 /*
1371 * Boxes that need ACPI PCI IRQ routing disabled
1372 */
1373 {
1374 .callback = disable_acpi_irq,
1375 .ident = "ASUS A7V",
1376 .matches = {
1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1378 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1379 /* newer BIOS, Revision 1011, does work */
1380 DMI_MATCH(DMI_BIOS_VERSION,
1381 "ASUS A7V ACPI BIOS Revision 1007"),
1382 },
1383 },
1384 {
1385 /*
1386 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1387 * for LPC bridge, which is needed for the PCI
1388 * interrupt links to work. DSDT fix is in bug 5966.
1389 * 2645, 2646 model numbers are shared with 600/600E/600X
1390 */
1391 .callback = disable_acpi_irq,
1392 .ident = "IBM Thinkpad 600 Series 2645",
1393 .matches = {
1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1396 },
1397 },
1398 {
1399 .callback = disable_acpi_irq,
1400 .ident = "IBM Thinkpad 600 Series 2646",
1401 .matches = {
1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1404 },
1405 },
1406 /*
1407 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1408 */
1409 { /* _BBN 0 bug */
1410 .callback = disable_acpi_pci,
1411 .ident = "ASUS PR-DLS",
1412 .matches = {
1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1414 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1415 DMI_MATCH(DMI_BIOS_VERSION,
1416 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1417 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1418 },
1419 },
1420 {
1421 .callback = disable_acpi_pci,
1422 .ident = "Acer TravelMate 36x Laptop",
1423 .matches = {
1424 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1425 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1426 },
1427 },
1428 {}
1429 };
1430
1431 /* second table for DMI checks that should run after early-quirks */
1432 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1433 /*
1434 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1435 * which includes some code which overrides all temperature
1436 * trip points to 16C if the INTIN2 input of the I/O APIC
1437 * is enabled. This input is incorrectly designated the
1438 * ISA IRQ 0 via an interrupt source override even though
1439 * it is wired to the output of the master 8259A and INTIN0
1440 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1441 * override in that cases.
1442 */
1443 {
1444 .callback = dmi_ignore_irq0_timer_override,
1445 .ident = "HP nx6115 laptop",
1446 .matches = {
1447 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1449 },
1450 },
1451 {
1452 .callback = dmi_ignore_irq0_timer_override,
1453 .ident = "HP NX6125 laptop",
1454 .matches = {
1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1457 },
1458 },
1459 {
1460 .callback = dmi_ignore_irq0_timer_override,
1461 .ident = "HP NX6325 laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1465 },
1466 },
1467 {
1468 .callback = dmi_ignore_irq0_timer_override,
1469 .ident = "HP 6715b laptop",
1470 .matches = {
1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1473 },
1474 },
1475 {}
1476 };
1477
1478 /*
1479 * acpi_boot_table_init() and acpi_boot_init()
1480 * called from setup_arch(), always.
1481 * 1. checksums all tables
1482 * 2. enumerates lapics
1483 * 3. enumerates io-apics
1484 *
1485 * acpi_table_init() is separate to allow reading SRAT without
1486 * other side effects.
1487 *
1488 * side effects of acpi_boot_init:
1489 * acpi_lapic = 1 if LAPIC found
1490 * acpi_ioapic = 1 if IOAPIC found
1491 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1492 * if acpi_blacklisted() acpi_disabled = 1;
1493 * acpi_irq_model=...
1494 * ...
1495 */
1496
acpi_boot_table_init(void)1497 void __init acpi_boot_table_init(void)
1498 {
1499 dmi_check_system(acpi_dmi_table);
1500
1501 /*
1502 * If acpi_disabled, bail out
1503 */
1504 if (acpi_disabled)
1505 return;
1506
1507 /*
1508 * Initialize the ACPI boot-time table parser.
1509 */
1510 if (acpi_table_init()) {
1511 disable_acpi();
1512 return;
1513 }
1514
1515 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1516
1517 /*
1518 * blacklist may disable ACPI entirely
1519 */
1520 if (acpi_blacklisted()) {
1521 if (acpi_force) {
1522 printk(KERN_WARNING PREFIX "acpi=force override\n");
1523 } else {
1524 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1525 disable_acpi();
1526 return;
1527 }
1528 }
1529 }
1530
early_acpi_boot_init(void)1531 int __init early_acpi_boot_init(void)
1532 {
1533 /*
1534 * If acpi_disabled, bail out
1535 */
1536 if (acpi_disabled)
1537 return 1;
1538
1539 /*
1540 * Process the Multiple APIC Description Table (MADT), if present
1541 */
1542 early_acpi_process_madt();
1543
1544 return 0;
1545 }
1546
acpi_boot_init(void)1547 int __init acpi_boot_init(void)
1548 {
1549 /* those are executed after early-quirks are executed */
1550 dmi_check_system(acpi_dmi_table_late);
1551
1552 /*
1553 * If acpi_disabled, bail out
1554 */
1555 if (acpi_disabled)
1556 return 1;
1557
1558 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1559
1560 /*
1561 * set sci_int and PM timer address
1562 */
1563 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1564
1565 /*
1566 * Process the Multiple APIC Description Table (MADT), if present
1567 */
1568 acpi_process_madt();
1569
1570 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1571
1572 if (!acpi_noirq)
1573 x86_init.pci.init = pci_acpi_init;
1574
1575 return 0;
1576 }
1577
parse_acpi(char * arg)1578 static int __init parse_acpi(char *arg)
1579 {
1580 if (!arg)
1581 return -EINVAL;
1582
1583 /* "acpi=off" disables both ACPI table parsing and interpreter */
1584 if (strcmp(arg, "off") == 0) {
1585 disable_acpi();
1586 }
1587 /* acpi=force to over-ride black-list */
1588 else if (strcmp(arg, "force") == 0) {
1589 acpi_force = 1;
1590 acpi_disabled = 0;
1591 }
1592 /* acpi=strict disables out-of-spec workarounds */
1593 else if (strcmp(arg, "strict") == 0) {
1594 acpi_strict = 1;
1595 }
1596 /* acpi=rsdt use RSDT instead of XSDT */
1597 else if (strcmp(arg, "rsdt") == 0) {
1598 acpi_rsdt_forced = 1;
1599 }
1600 /* "acpi=noirq" disables ACPI interrupt routing */
1601 else if (strcmp(arg, "noirq") == 0) {
1602 acpi_noirq_set();
1603 }
1604 /* "acpi=copy_dsdt" copys DSDT */
1605 else if (strcmp(arg, "copy_dsdt") == 0) {
1606 acpi_gbl_copy_dsdt_locally = 1;
1607 } else {
1608 /* Core will printk when we return error. */
1609 return -EINVAL;
1610 }
1611 return 0;
1612 }
1613 early_param("acpi", parse_acpi);
1614
1615 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
parse_pci(char * arg)1616 static int __init parse_pci(char *arg)
1617 {
1618 if (arg && strcmp(arg, "noacpi") == 0)
1619 acpi_disable_pci();
1620 return 0;
1621 }
1622 early_param("pci", parse_pci);
1623
acpi_mps_check(void)1624 int __init acpi_mps_check(void)
1625 {
1626 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1627 /* mptable code is not built-in*/
1628 if (acpi_disabled || acpi_noirq) {
1629 printk(KERN_WARNING "MPS support code is not built-in.\n"
1630 "Using acpi=off or acpi=noirq or pci=noacpi "
1631 "may have problem\n");
1632 return 1;
1633 }
1634 #endif
1635 return 0;
1636 }
1637
1638 #ifdef CONFIG_X86_IO_APIC
parse_acpi_skip_timer_override(char * arg)1639 static int __init parse_acpi_skip_timer_override(char *arg)
1640 {
1641 acpi_skip_timer_override = 1;
1642 return 0;
1643 }
1644 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1645
parse_acpi_use_timer_override(char * arg)1646 static int __init parse_acpi_use_timer_override(char *arg)
1647 {
1648 acpi_use_timer_override = 1;
1649 return 0;
1650 }
1651 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1652 #endif /* CONFIG_X86_IO_APIC */
1653
setup_acpi_sci(char * s)1654 static int __init setup_acpi_sci(char *s)
1655 {
1656 if (!s)
1657 return -EINVAL;
1658 if (!strcmp(s, "edge"))
1659 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1660 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1661 else if (!strcmp(s, "level"))
1662 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1663 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1664 else if (!strcmp(s, "high"))
1665 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1666 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1667 else if (!strcmp(s, "low"))
1668 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1669 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1670 else
1671 return -EINVAL;
1672 return 0;
1673 }
1674 early_param("acpi_sci", setup_acpi_sci);
1675
__acpi_acquire_global_lock(unsigned int * lock)1676 int __acpi_acquire_global_lock(unsigned int *lock)
1677 {
1678 unsigned int old, new, val;
1679 do {
1680 old = *lock;
1681 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1682 val = cmpxchg(lock, old, new);
1683 } while (unlikely (val != old));
1684 return (new < 3) ? -1 : 0;
1685 }
1686
__acpi_release_global_lock(unsigned int * lock)1687 int __acpi_release_global_lock(unsigned int *lock)
1688 {
1689 unsigned int old, new, val;
1690 do {
1691 old = *lock;
1692 new = old & ~0x3;
1693 val = cmpxchg(lock, old, new);
1694 } while (unlikely (val != old));
1695 return old & 0x1;
1696 }
1697