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10#include <linux/mm.h>
11#include <linux/init.h>
12#include <linux/delay.h>
13#include <linux/bootmem.h>
14#include <linux/kernel_stat.h>
15#include <linux/mc146818rtc.h>
16#include <linux/bitops.h>
17#include <linux/acpi.h>
18#include <linux/module.h>
19
20#include <asm/smp.h>
21#include <asm/mtrr.h>
22#include <asm/mpspec.h>
23#include <asm/pgalloc.h>
24#include <asm/io_apic.h>
25#include <asm/proto.h>
26#include <asm/acpi.h>
27#include <asm/bios_ebda.h>
28#include <asm/e820.h>
29#include <asm/trampoline.h>
30#include <asm/setup.h>
31
32#include <mach_apic.h>
33#ifdef CONFIG_X86_32
34#include <mach_apicdef.h>
35#include <mach_mpparse.h>
36#endif
37
38
39
40
41
42static int __init mpf_checksum(unsigned char *mp, int len)
43{
44 int sum = 0;
45
46 while (len--)
47 sum += *mp++;
48
49 return sum & 0xFF;
50}
51
52static void __init MP_processor_info(struct mpc_config_processor *m)
53{
54 int apicid;
55 char *bootup_cpu = "";
56
57 if (!(m->mpc_cpuflag & CPU_ENABLED)) {
58 disabled_cpus++;
59 return;
60 }
61
62 if (x86_quirks->mpc_apic_id)
63 apicid = x86_quirks->mpc_apic_id(m);
64 else
65 apicid = m->mpc_apicid;
66
67 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
68 bootup_cpu = " (Bootup-CPU)";
69 boot_cpu_physical_apicid = m->mpc_apicid;
70 }
71
72 printk(KERN_INFO "Processor #%d%s\n", m->mpc_apicid, bootup_cpu);
73 generic_processor_info(apicid, m->mpc_apicver);
74}
75
76#ifdef CONFIG_X86_IO_APIC
77static void __init MP_bus_info(struct mpc_config_bus *m)
78{
79 char str[7];
80 memcpy(str, m->mpc_bustype, 6);
81 str[6] = 0;
82
83 if (x86_quirks->mpc_oem_bus_info)
84 x86_quirks->mpc_oem_bus_info(m, str);
85 else
86 apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->mpc_busid, str);
87
88#if MAX_MP_BUSSES < 256
89 if (m->mpc_busid >= MAX_MP_BUSSES) {
90 printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
91 " is too large, max. supported is %d\n",
92 m->mpc_busid, str, MAX_MP_BUSSES - 1);
93 return;
94 }
95#endif
96
97 if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
98 set_bit(m->mpc_busid, mp_bus_not_pci);
99#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
100 mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA;
101#endif
102 } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
103 if (x86_quirks->mpc_oem_pci_bus)
104 x86_quirks->mpc_oem_pci_bus(m);
105
106 clear_bit(m->mpc_busid, mp_bus_not_pci);
107#if defined(CONFIG_EISA) || defined (CONFIG_MCA)
108 mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI;
109 } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
110 mp_bus_id_to_type[m->mpc_busid] = MP_BUS_EISA;
111 } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
112 mp_bus_id_to_type[m->mpc_busid] = MP_BUS_MCA;
113#endif
114 } else
115 printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
116}
117#endif
118
119#ifdef CONFIG_X86_IO_APIC
120
121static int bad_ioapic(unsigned long address)
122{
123 if (nr_ioapics >= MAX_IO_APICS) {
124 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
125 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
126 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
127 }
128 if (!address) {
129 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
130 " found in table, skipping!\n");
131 return 1;
132 }
133 return 0;
134}
135
136static void __init MP_ioapic_info(struct mpc_config_ioapic *m)
137{
138 if (!(m->mpc_flags & MPC_APIC_USABLE))
139 return;
140
141 printk(KERN_INFO "I/O APIC #%d Version %d at 0x%X.\n",
142 m->mpc_apicid, m->mpc_apicver, m->mpc_apicaddr);
143
144 if (bad_ioapic(m->mpc_apicaddr))
145 return;
146
147 mp_ioapics[nr_ioapics].mp_apicaddr = m->mpc_apicaddr;
148 mp_ioapics[nr_ioapics].mp_apicid = m->mpc_apicid;
149 mp_ioapics[nr_ioapics].mp_type = m->mpc_type;
150 mp_ioapics[nr_ioapics].mp_apicver = m->mpc_apicver;
151 mp_ioapics[nr_ioapics].mp_flags = m->mpc_flags;
152 nr_ioapics++;
153}
154
155static void print_MP_intsrc_info(struct mpc_config_intsrc *m)
156{
157 apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
158 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
159 m->mpc_irqtype, m->mpc_irqflag & 3,
160 (m->mpc_irqflag >> 2) & 3, m->mpc_srcbus,
161 m->mpc_srcbusirq, m->mpc_dstapic, m->mpc_dstirq);
162}
163
164static void __init print_mp_irq_info(struct mp_config_intsrc *mp_irq)
165{
166 apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
167 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
168 mp_irq->mp_irqtype, mp_irq->mp_irqflag & 3,
169 (mp_irq->mp_irqflag >> 2) & 3, mp_irq->mp_srcbus,
170 mp_irq->mp_srcbusirq, mp_irq->mp_dstapic, mp_irq->mp_dstirq);
171}
172
173static void __init assign_to_mp_irq(struct mpc_config_intsrc *m,
174 struct mp_config_intsrc *mp_irq)
175{
176 mp_irq->mp_dstapic = m->mpc_dstapic;
177 mp_irq->mp_type = m->mpc_type;
178 mp_irq->mp_irqtype = m->mpc_irqtype;
179 mp_irq->mp_irqflag = m->mpc_irqflag;
180 mp_irq->mp_srcbus = m->mpc_srcbus;
181 mp_irq->mp_srcbusirq = m->mpc_srcbusirq;
182 mp_irq->mp_dstirq = m->mpc_dstirq;
183}
184
185static void __init assign_to_mpc_intsrc(struct mp_config_intsrc *mp_irq,
186 struct mpc_config_intsrc *m)
187{
188 m->mpc_dstapic = mp_irq->mp_dstapic;
189 m->mpc_type = mp_irq->mp_type;
190 m->mpc_irqtype = mp_irq->mp_irqtype;
191 m->mpc_irqflag = mp_irq->mp_irqflag;
192 m->mpc_srcbus = mp_irq->mp_srcbus;
193 m->mpc_srcbusirq = mp_irq->mp_srcbusirq;
194 m->mpc_dstirq = mp_irq->mp_dstirq;
195}
196
197static int __init mp_irq_mpc_intsrc_cmp(struct mp_config_intsrc *mp_irq,
198 struct mpc_config_intsrc *m)
199{
200 if (mp_irq->mp_dstapic != m->mpc_dstapic)
201 return 1;
202 if (mp_irq->mp_type != m->mpc_type)
203 return 2;
204 if (mp_irq->mp_irqtype != m->mpc_irqtype)
205 return 3;
206 if (mp_irq->mp_irqflag != m->mpc_irqflag)
207 return 4;
208 if (mp_irq->mp_srcbus != m->mpc_srcbus)
209 return 5;
210 if (mp_irq->mp_srcbusirq != m->mpc_srcbusirq)
211 return 6;
212 if (mp_irq->mp_dstirq != m->mpc_dstirq)
213 return 7;
214
215 return 0;
216}
217
218static void __init MP_intsrc_info(struct mpc_config_intsrc *m)
219{
220 int i;
221
222 print_MP_intsrc_info(m);
223
224 for (i = 0; i < mp_irq_entries; i++) {
225 if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m))
226 return;
227 }
228
229 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
230 if (++mp_irq_entries == MAX_IRQ_SOURCES)
231 panic("Max # of irq sources exceeded!!\n");
232}
233
234#endif
235
236static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m)
237{
238 apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
239 " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
240 m->mpc_irqtype, m->mpc_irqflag & 3,
241 (m->mpc_irqflag >> 2) & 3, m->mpc_srcbusid,
242 m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint);
243}
244
245
246
247
248
249static int __init smp_check_mpc(struct mp_config_table *mpc, char *oem,
250 char *str)
251{
252
253 if (memcmp(mpc->mpc_signature, MPC_SIGNATURE, 4)) {
254 printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
255 mpc->mpc_signature[0], mpc->mpc_signature[1],
256 mpc->mpc_signature[2], mpc->mpc_signature[3]);
257 return 0;
258 }
259 if (mpf_checksum((unsigned char *)mpc, mpc->mpc_length)) {
260 printk(KERN_ERR "MPTABLE: checksum error!\n");
261 return 0;
262 }
263 if (mpc->mpc_spec != 0x01 && mpc->mpc_spec != 0x04) {
264 printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
265 mpc->mpc_spec);
266 return 0;
267 }
268 if (!mpc->mpc_lapic) {
269 printk(KERN_ERR "MPTABLE: null local APIC address!\n");
270 return 0;
271 }
272 memcpy(oem, mpc->mpc_oem, 8);
273 oem[8] = 0;
274 printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem);
275
276 memcpy(str, mpc->mpc_productid, 12);
277 str[12] = 0;
278
279 printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
280
281 printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->mpc_lapic);
282
283 return 1;
284}
285
286static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early)
287{
288 char str[16];
289 char oem[10];
290
291 int count = sizeof(*mpc);
292 unsigned char *mpt = ((unsigned char *)mpc) + count;
293
294 if (!smp_check_mpc(mpc, oem, str))
295 return 0;
296
297#ifdef CONFIG_X86_32
298
299
300
301
302 if (early) {
303#ifdef CONFIG_X86_NUMAQ
304 numaq_mps_oem_check(mpc, oem, str);
305#endif
306 } else
307 mps_oem_check(mpc, oem, str);
308#endif
309
310 if (!acpi_lapic)
311 mp_lapic_addr = mpc->mpc_lapic;
312
313 if (early)
314 return 1;
315
316 if (mpc->mpc_oemptr && x86_quirks->smp_read_mpc_oem) {
317 struct mp_config_oemtable *oem_table = (struct mp_config_oemtable *)(unsigned long)mpc->mpc_oemptr;
318 x86_quirks->smp_read_mpc_oem(oem_table, mpc->mpc_oemsize);
319 }
320
321
322
323
324 if (x86_quirks->mpc_record)
325 *x86_quirks->mpc_record = 0;
326
327 while (count < mpc->mpc_length) {
328 switch (*mpt) {
329 case MP_PROCESSOR:
330 {
331 struct mpc_config_processor *m =
332 (struct mpc_config_processor *)mpt;
333
334 if (!acpi_lapic)
335 MP_processor_info(m);
336 mpt += sizeof(*m);
337 count += sizeof(*m);
338 break;
339 }
340 case MP_BUS:
341 {
342 struct mpc_config_bus *m =
343 (struct mpc_config_bus *)mpt;
344#ifdef CONFIG_X86_IO_APIC
345 MP_bus_info(m);
346#endif
347 mpt += sizeof(*m);
348 count += sizeof(*m);
349 break;
350 }
351 case MP_IOAPIC:
352 {
353#ifdef CONFIG_X86_IO_APIC
354 struct mpc_config_ioapic *m =
355 (struct mpc_config_ioapic *)mpt;
356 MP_ioapic_info(m);
357#endif
358 mpt += sizeof(struct mpc_config_ioapic);
359 count += sizeof(struct mpc_config_ioapic);
360 break;
361 }
362 case MP_INTSRC:
363 {
364#ifdef CONFIG_X86_IO_APIC
365 struct mpc_config_intsrc *m =
366 (struct mpc_config_intsrc *)mpt;
367
368 MP_intsrc_info(m);
369#endif
370 mpt += sizeof(struct mpc_config_intsrc);
371 count += sizeof(struct mpc_config_intsrc);
372 break;
373 }
374 case MP_LINTSRC:
375 {
376 struct mpc_config_lintsrc *m =
377 (struct mpc_config_lintsrc *)mpt;
378 MP_lintsrc_info(m);
379 mpt += sizeof(*m);
380 count += sizeof(*m);
381 break;
382 }
383 default:
384
385 printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n");
386 printk(KERN_ERR "type %x\n", *mpt);
387 print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
388 1, mpc, mpc->mpc_length, 1);
389 count = mpc->mpc_length;
390 break;
391 }
392 if (x86_quirks->mpc_record)
393 (*x86_quirks->mpc_record)++;
394 }
395
396#ifdef CONFIG_X86_GENERICARCH
397 generic_bigsmp_probe();
398#endif
399
400#ifdef CONFIG_X86_32
401 setup_apic_routing();
402#endif
403 if (!num_processors)
404 printk(KERN_ERR "MPTABLE: no processors registered!\n");
405 return num_processors;
406}
407
408#ifdef CONFIG_X86_IO_APIC
409
410static int __init ELCR_trigger(unsigned int irq)
411{
412 unsigned int port;
413
414 port = 0x4d0 + (irq >> 3);
415 return (inb(port) >> (irq & 7)) & 1;
416}
417
418static void __init construct_default_ioirq_mptable(int mpc_default_type)
419{
420 struct mpc_config_intsrc intsrc;
421 int i;
422 int ELCR_fallback = 0;
423
424 intsrc.mpc_type = MP_INTSRC;
425 intsrc.mpc_irqflag = 0;
426 intsrc.mpc_srcbus = 0;
427 intsrc.mpc_dstapic = mp_ioapics[0].mp_apicid;
428
429 intsrc.mpc_irqtype = mp_INT;
430
431
432
433
434
435
436
437
438
439 if (mpc_default_type == 5) {
440 printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
441 "falling back to ELCR\n");
442
443 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
444 ELCR_trigger(13))
445 printk(KERN_ERR "ELCR contains invalid data... "
446 "not using ELCR\n");
447 else {
448 printk(KERN_INFO
449 "Using ELCR to identify PCI interrupts\n");
450 ELCR_fallback = 1;
451 }
452 }
453
454 for (i = 0; i < 16; i++) {
455 switch (mpc_default_type) {
456 case 2:
457 if (i == 0 || i == 13)
458 continue;
459
460 default:
461 if (i == 2)
462 continue;
463 }
464
465 if (ELCR_fallback) {
466
467
468
469
470
471 if (ELCR_trigger(i))
472 intsrc.mpc_irqflag = 13;
473 else
474 intsrc.mpc_irqflag = 0;
475 }
476
477 intsrc.mpc_srcbusirq = i;
478 intsrc.mpc_dstirq = i ? i : 2;
479 MP_intsrc_info(&intsrc);
480 }
481
482 intsrc.mpc_irqtype = mp_ExtINT;
483 intsrc.mpc_srcbusirq = 0;
484 intsrc.mpc_dstirq = 0;
485 MP_intsrc_info(&intsrc);
486}
487
488
489static void __init construct_ioapic_table(int mpc_default_type)
490{
491 struct mpc_config_ioapic ioapic;
492 struct mpc_config_bus bus;
493
494 bus.mpc_type = MP_BUS;
495 bus.mpc_busid = 0;
496 switch (mpc_default_type) {
497 default:
498 printk(KERN_ERR "???\nUnknown standard configuration %d\n",
499 mpc_default_type);
500
501 case 1:
502 case 5:
503 memcpy(bus.mpc_bustype, "ISA ", 6);
504 break;
505 case 2:
506 case 6:
507 case 3:
508 memcpy(bus.mpc_bustype, "EISA ", 6);
509 break;
510 case 4:
511 case 7:
512 memcpy(bus.mpc_bustype, "MCA ", 6);
513 }
514 MP_bus_info(&bus);
515 if (mpc_default_type > 4) {
516 bus.mpc_busid = 1;
517 memcpy(bus.mpc_bustype, "PCI ", 6);
518 MP_bus_info(&bus);
519 }
520
521 ioapic.mpc_type = MP_IOAPIC;
522 ioapic.mpc_apicid = 2;
523 ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
524 ioapic.mpc_flags = MPC_APIC_USABLE;
525 ioapic.mpc_apicaddr = 0xFEC00000;
526 MP_ioapic_info(&ioapic);
527
528
529
530
531 construct_default_ioirq_mptable(mpc_default_type);
532}
533#else
534static inline void __init construct_ioapic_table(int mpc_default_type) { }
535#endif
536
537static inline void __init construct_default_ISA_mptable(int mpc_default_type)
538{
539 struct mpc_config_processor processor;
540 struct mpc_config_lintsrc lintsrc;
541 int linttypes[2] = { mp_ExtINT, mp_NMI };
542 int i;
543
544
545
546
547 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
548
549
550
551
552 processor.mpc_type = MP_PROCESSOR;
553
554 processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
555 processor.mpc_cpuflag = CPU_ENABLED;
556 processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
557 (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
558 processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
559 processor.mpc_reserved[0] = 0;
560 processor.mpc_reserved[1] = 0;
561 for (i = 0; i < 2; i++) {
562 processor.mpc_apicid = i;
563 MP_processor_info(&processor);
564 }
565
566 construct_ioapic_table(mpc_default_type);
567
568 lintsrc.mpc_type = MP_LINTSRC;
569 lintsrc.mpc_irqflag = 0;
570 lintsrc.mpc_srcbusid = 0;
571 lintsrc.mpc_srcbusirq = 0;
572 lintsrc.mpc_destapic = MP_APIC_ALL;
573 for (i = 0; i < 2; i++) {
574 lintsrc.mpc_irqtype = linttypes[i];
575 lintsrc.mpc_destapiclint = i;
576 MP_lintsrc_info(&lintsrc);
577 }
578}
579
580static struct intel_mp_floating *mpf_found;
581
582
583
584
585static void __init __get_smp_config(unsigned int early)
586{
587 struct intel_mp_floating *mpf = mpf_found;
588
589 if (x86_quirks->mach_get_smp_config) {
590 if (x86_quirks->mach_get_smp_config(early))
591 return;
592 }
593 if (acpi_lapic && early)
594 return;
595
596
597
598
599 if (acpi_lapic && acpi_ioapic) {
600 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
601 "information\n");
602 return;
603 } else if (acpi_lapic)
604 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
605 "configuration information\n");
606
607 if (!mpf)
608 return;
609
610 printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
611 mpf->mpf_specification);
612#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
613 if (mpf->mpf_feature2 & (1 << 7)) {
614 printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
615 pic_mode = 1;
616 } else {
617 printk(KERN_INFO " Virtual Wire compatibility mode.\n");
618 pic_mode = 0;
619 }
620#endif
621
622
623
624 if (mpf->mpf_feature1 != 0) {
625 if (early) {
626
627
628
629 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
630 return;
631 }
632
633 printk(KERN_INFO "Default MP configuration #%d\n",
634 mpf->mpf_feature1);
635 construct_default_ISA_mptable(mpf->mpf_feature1);
636
637 } else if (mpf->mpf_physptr) {
638
639
640
641
642
643 if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr), early)) {
644#ifdef CONFIG_X86_LOCAL_APIC
645 smp_found_config = 0;
646#endif
647 printk(KERN_ERR
648 "BIOS bug, MP table errors detected!...\n");
649 printk(KERN_ERR "... disabling SMP support. "
650 "(tell your hw vendor)\n");
651 return;
652 }
653
654 if (early)
655 return;
656#ifdef CONFIG_X86_IO_APIC
657
658
659
660
661
662 if (!mp_irq_entries) {
663 struct mpc_config_bus bus;
664
665 printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
666 "using default mptable. "
667 "(tell your hw vendor)\n");
668
669 bus.mpc_type = MP_BUS;
670 bus.mpc_busid = 0;
671 memcpy(bus.mpc_bustype, "ISA ", 6);
672 MP_bus_info(&bus);
673
674 construct_default_ioirq_mptable(0);
675 }
676#endif
677 } else
678 BUG();
679
680 if (!early)
681 printk(KERN_INFO "Processors: %d\n", num_processors);
682
683
684
685}
686
687void __init early_get_smp_config(void)
688{
689 __get_smp_config(1);
690}
691
692void __init get_smp_config(void)
693{
694 __get_smp_config(0);
695}
696
697static int __init smp_scan_config(unsigned long base, unsigned long length,
698 unsigned reserve)
699{
700 unsigned int *bp = phys_to_virt(base);
701 struct intel_mp_floating *mpf;
702
703 apic_printk(APIC_VERBOSE, "Scan SMP from %p for %ld bytes.\n",
704 bp, length);
705 BUILD_BUG_ON(sizeof(*mpf) != 16);
706
707 while (length > 0) {
708 mpf = (struct intel_mp_floating *)bp;
709 if ((*bp == SMP_MAGIC_IDENT) &&
710 (mpf->mpf_length == 1) &&
711 !mpf_checksum((unsigned char *)bp, 16) &&
712 ((mpf->mpf_specification == 1)
713 || (mpf->mpf_specification == 4))) {
714#ifdef CONFIG_X86_LOCAL_APIC
715 smp_found_config = 1;
716#endif
717 mpf_found = mpf;
718
719 printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
720 mpf, virt_to_phys(mpf));
721
722 if (!reserve)
723 return 1;
724 reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
725 BOOTMEM_DEFAULT);
726 if (mpf->mpf_physptr) {
727 unsigned long size = PAGE_SIZE;
728#ifdef CONFIG_X86_32
729
730
731
732
733
734
735
736
737
738 unsigned long end = max_low_pfn * PAGE_SIZE;
739 if (mpf->mpf_physptr + size > end)
740 size = end - mpf->mpf_physptr;
741#endif
742 reserve_bootmem_generic(mpf->mpf_physptr, size,
743 BOOTMEM_DEFAULT);
744 }
745
746 return 1;
747 }
748 bp += 4;
749 length -= 16;
750 }
751 return 0;
752}
753
754static void __init __find_smp_config(unsigned int reserve)
755{
756 unsigned int address;
757
758 if (x86_quirks->mach_find_smp_config) {
759 if (x86_quirks->mach_find_smp_config(reserve))
760 return;
761 }
762
763
764
765
766
767
768
769
770 if (smp_scan_config(0x0, 0x400, reserve) ||
771 smp_scan_config(639 * 0x400, 0x400, reserve) ||
772 smp_scan_config(0xF0000, 0x10000, reserve))
773 return;
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791 address = get_bios_ebda();
792 if (address)
793 smp_scan_config(address, 0x400, reserve);
794}
795
796void __init early_find_smp_config(void)
797{
798 __find_smp_config(0);
799}
800
801void __init find_smp_config(void)
802{
803 __find_smp_config(1);
804}
805
806#ifdef CONFIG_X86_IO_APIC
807static u8 __initdata irq_used[MAX_IRQ_SOURCES];
808
809static int __init get_MP_intsrc_index(struct mpc_config_intsrc *m)
810{
811 int i;
812
813 if (m->mpc_irqtype != mp_INT)
814 return 0;
815
816 if (m->mpc_irqflag != 0x0f)
817 return 0;
818
819
820
821 for (i = 0; i < mp_irq_entries; i++) {
822 if (mp_irqs[i].mp_irqtype != mp_INT)
823 continue;
824
825 if (mp_irqs[i].mp_irqflag != 0x0f)
826 continue;
827
828 if (mp_irqs[i].mp_srcbus != m->mpc_srcbus)
829 continue;
830 if (mp_irqs[i].mp_srcbusirq != m->mpc_srcbusirq)
831 continue;
832 if (irq_used[i]) {
833
834 return -2;
835 }
836 irq_used[i] = 1;
837 return i;
838 }
839
840
841 return -1;
842}
843
844#define SPARE_SLOT_NUM 20
845
846static struct mpc_config_intsrc __initdata *m_spare[SPARE_SLOT_NUM];
847#endif
848
849static int __init replace_intsrc_all(struct mp_config_table *mpc,
850 unsigned long mpc_new_phys,
851 unsigned long mpc_new_length)
852{
853#ifdef CONFIG_X86_IO_APIC
854 int i;
855 int nr_m_spare = 0;
856#endif
857
858 int count = sizeof(*mpc);
859 unsigned char *mpt = ((unsigned char *)mpc) + count;
860
861 printk(KERN_INFO "mpc_length %x\n", mpc->mpc_length);
862 while (count < mpc->mpc_length) {
863 switch (*mpt) {
864 case MP_PROCESSOR:
865 {
866 struct mpc_config_processor *m =
867 (struct mpc_config_processor *)mpt;
868 mpt += sizeof(*m);
869 count += sizeof(*m);
870 break;
871 }
872 case MP_BUS:
873 {
874 struct mpc_config_bus *m =
875 (struct mpc_config_bus *)mpt;
876 mpt += sizeof(*m);
877 count += sizeof(*m);
878 break;
879 }
880 case MP_IOAPIC:
881 {
882 mpt += sizeof(struct mpc_config_ioapic);
883 count += sizeof(struct mpc_config_ioapic);
884 break;
885 }
886 case MP_INTSRC:
887 {
888#ifdef CONFIG_X86_IO_APIC
889 struct mpc_config_intsrc *m =
890 (struct mpc_config_intsrc *)mpt;
891
892 printk(KERN_INFO "OLD ");
893 print_MP_intsrc_info(m);
894 i = get_MP_intsrc_index(m);
895 if (i > 0) {
896 assign_to_mpc_intsrc(&mp_irqs[i], m);
897 printk(KERN_INFO "NEW ");
898 print_mp_irq_info(&mp_irqs[i]);
899 } else if (!i) {
900
901 } else if (nr_m_spare < SPARE_SLOT_NUM) {
902
903
904
905
906
907 m_spare[nr_m_spare] = m;
908 nr_m_spare++;
909 }
910#endif
911 mpt += sizeof(struct mpc_config_intsrc);
912 count += sizeof(struct mpc_config_intsrc);
913 break;
914 }
915 case MP_LINTSRC:
916 {
917 struct mpc_config_lintsrc *m =
918 (struct mpc_config_lintsrc *)mpt;
919 mpt += sizeof(*m);
920 count += sizeof(*m);
921 break;
922 }
923 default:
924
925 printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n");
926 printk(KERN_ERR "type %x\n", *mpt);
927 print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
928 1, mpc, mpc->mpc_length, 1);
929 goto out;
930 }
931 }
932
933#ifdef CONFIG_X86_IO_APIC
934 for (i = 0; i < mp_irq_entries; i++) {
935 if (irq_used[i])
936 continue;
937
938 if (mp_irqs[i].mp_irqtype != mp_INT)
939 continue;
940
941 if (mp_irqs[i].mp_irqflag != 0x0f)
942 continue;
943
944 if (nr_m_spare > 0) {
945 printk(KERN_INFO "*NEW* found ");
946 nr_m_spare--;
947 assign_to_mpc_intsrc(&mp_irqs[i], m_spare[nr_m_spare]);
948 m_spare[nr_m_spare] = NULL;
949 } else {
950 struct mpc_config_intsrc *m =
951 (struct mpc_config_intsrc *)mpt;
952 count += sizeof(struct mpc_config_intsrc);
953 if (!mpc_new_phys) {
954 printk(KERN_INFO "No spare slots, try to append...take your risk, new mpc_length %x\n", count);
955 } else {
956 if (count <= mpc_new_length)
957 printk(KERN_INFO "No spare slots, try to append..., new mpc_length %x\n", count);
958 else {
959 printk(KERN_ERR "mpc_new_length %lx is too small\n", mpc_new_length);
960 goto out;
961 }
962 }
963 assign_to_mpc_intsrc(&mp_irqs[i], m);
964 mpc->mpc_length = count;
965 mpt += sizeof(struct mpc_config_intsrc);
966 }
967 print_mp_irq_info(&mp_irqs[i]);
968 }
969#endif
970out:
971
972 mpc->mpc_checksum = 0;
973 mpc->mpc_checksum -= mpf_checksum((unsigned char *)mpc,
974 mpc->mpc_length);
975
976 return 0;
977}
978
979static int __initdata enable_update_mptable;
980
981static int __init update_mptable_setup(char *str)
982{
983 enable_update_mptable = 1;
984 return 0;
985}
986early_param("update_mptable", update_mptable_setup);
987
988static unsigned long __initdata mpc_new_phys;
989static unsigned long mpc_new_length __initdata = 4096;
990
991
992static int __initdata alloc_mptable;
993static int __init parse_alloc_mptable_opt(char *p)
994{
995 enable_update_mptable = 1;
996 alloc_mptable = 1;
997 if (!p)
998 return 0;
999 mpc_new_length = memparse(p, &p);
1000 return 0;
1001}
1002early_param("alloc_mptable", parse_alloc_mptable_opt);
1003
1004void __init early_reserve_e820_mpc_new(void)
1005{
1006 if (enable_update_mptable && alloc_mptable) {
1007 u64 startt = 0;
1008#ifdef CONFIG_X86_TRAMPOLINE
1009 startt = TRAMPOLINE_BASE;
1010#endif
1011 mpc_new_phys = early_reserve_e820(startt, mpc_new_length, 4);
1012 }
1013}
1014
1015static int __init update_mp_table(void)
1016{
1017 char str[16];
1018 char oem[10];
1019 struct intel_mp_floating *mpf;
1020 struct mp_config_table *mpc;
1021 struct mp_config_table *mpc_new;
1022
1023 if (!enable_update_mptable)
1024 return 0;
1025
1026 mpf = mpf_found;
1027 if (!mpf)
1028 return 0;
1029
1030
1031
1032
1033 if (mpf->mpf_feature1 != 0)
1034 return 0;
1035
1036 if (!mpf->mpf_physptr)
1037 return 0;
1038
1039 mpc = phys_to_virt(mpf->mpf_physptr);
1040
1041 if (!smp_check_mpc(mpc, oem, str))
1042 return 0;
1043
1044 printk(KERN_INFO "mpf: %lx\n", virt_to_phys(mpf));
1045 printk(KERN_INFO "mpf_physptr: %x\n", mpf->mpf_physptr);
1046
1047 if (mpc_new_phys && mpc->mpc_length > mpc_new_length) {
1048 mpc_new_phys = 0;
1049 printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
1050 mpc_new_length);
1051 }
1052
1053 if (!mpc_new_phys) {
1054 unsigned char old, new;
1055
1056 mpc->mpc_checksum = 0;
1057 old = mpf_checksum((unsigned char *)mpc, mpc->mpc_length);
1058 mpc->mpc_checksum = 0xff;
1059 new = mpf_checksum((unsigned char *)mpc, mpc->mpc_length);
1060 if (old == new) {
1061 printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
1062 return 0;
1063 }
1064 printk(KERN_INFO "use in-positon replacing\n");
1065 } else {
1066 mpf->mpf_physptr = mpc_new_phys;
1067 mpc_new = phys_to_virt(mpc_new_phys);
1068 memcpy(mpc_new, mpc, mpc->mpc_length);
1069 mpc = mpc_new;
1070
1071 if (mpc_new_phys - mpf->mpf_physptr) {
1072 struct intel_mp_floating *mpf_new;
1073
1074 printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
1075 mpf_new = phys_to_virt(0x400 - 16);
1076 memcpy(mpf_new, mpf, 16);
1077 mpf = mpf_new;
1078 mpf->mpf_physptr = mpc_new_phys;
1079 }
1080 mpf->mpf_checksum = 0;
1081 mpf->mpf_checksum -= mpf_checksum((unsigned char *)mpf, 16);
1082 printk(KERN_INFO "mpf_physptr new: %x\n", mpf->mpf_physptr);
1083 }
1084
1085
1086
1087
1088
1089
1090
1091 replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length);
1092
1093 return 0;
1094}
1095
1096late_initcall(update_mp_table);
1097
