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x86: fix MP_processor_info section mismatch warning
[deliverable/linux.git] / arch / x86 / kernel / mpparse.c
1 /*
2 * Intel Multiprocessor Specification 1.1 and 1.4
3 * compliant MP-table parsing routines.
4 *
5 * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
6 * (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
7 * (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de>
8 */
9
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 * Checksum an MP configuration block.
40 */
41
42 static 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
52 static 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
77 static 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 printk(KERN_INFO "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
121 static 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
136 static 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
155 static void print_MP_intsrc_info(struct mpc_config_intsrc *m)
156 {
157 printk(KERN_CONT "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
164 static void __init print_mp_irq_info(struct mp_config_intsrc *mp_irq)
165 {
166 printk(KERN_CONT "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
173 static 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
185 static 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
197 static 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
218 static 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
236 static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m)
237 {
238 printk(KERN_INFO "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 * Read/parse the MPC
247 */
248
249 static 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
286 static 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 * need to make sure summit and es7000's mps_oem_check is safe to be
300 * called early via genericarch 's mps_oem_check
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 /* save the local APIC address, it might be non-default */
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 * Now process the configuration blocks.
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 /* ACPI may have already provided this data */
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 /* wrong mptable */
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 setup_apic_routing();
401 if (!num_processors)
402 printk(KERN_ERR "MPTABLE: no processors registered!\n");
403 return num_processors;
404 }
405
406 #ifdef CONFIG_X86_IO_APIC
407
408 static int __init ELCR_trigger(unsigned int irq)
409 {
410 unsigned int port;
411
412 port = 0x4d0 + (irq >> 3);
413 return (inb(port) >> (irq & 7)) & 1;
414 }
415
416 static void __init construct_default_ioirq_mptable(int mpc_default_type)
417 {
418 struct mpc_config_intsrc intsrc;
419 int i;
420 int ELCR_fallback = 0;
421
422 intsrc.mpc_type = MP_INTSRC;
423 intsrc.mpc_irqflag = 0; /* conforming */
424 intsrc.mpc_srcbus = 0;
425 intsrc.mpc_dstapic = mp_ioapics[0].mp_apicid;
426
427 intsrc.mpc_irqtype = mp_INT;
428
429 /*
430 * If true, we have an ISA/PCI system with no IRQ entries
431 * in the MP table. To prevent the PCI interrupts from being set up
432 * incorrectly, we try to use the ELCR. The sanity check to see if
433 * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
434 * never be level sensitive, so we simply see if the ELCR agrees.
435 * If it does, we assume it's valid.
436 */
437 if (mpc_default_type == 5) {
438 printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
439 "falling back to ELCR\n");
440
441 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
442 ELCR_trigger(13))
443 printk(KERN_ERR "ELCR contains invalid data... "
444 "not using ELCR\n");
445 else {
446 printk(KERN_INFO
447 "Using ELCR to identify PCI interrupts\n");
448 ELCR_fallback = 1;
449 }
450 }
451
452 for (i = 0; i < 16; i++) {
453 switch (mpc_default_type) {
454 case 2:
455 if (i == 0 || i == 13)
456 continue; /* IRQ0 & IRQ13 not connected */
457 /* fall through */
458 default:
459 if (i == 2)
460 continue; /* IRQ2 is never connected */
461 }
462
463 if (ELCR_fallback) {
464 /*
465 * If the ELCR indicates a level-sensitive interrupt, we
466 * copy that information over to the MP table in the
467 * irqflag field (level sensitive, active high polarity).
468 */
469 if (ELCR_trigger(i))
470 intsrc.mpc_irqflag = 13;
471 else
472 intsrc.mpc_irqflag = 0;
473 }
474
475 intsrc.mpc_srcbusirq = i;
476 intsrc.mpc_dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
477 MP_intsrc_info(&intsrc);
478 }
479
480 intsrc.mpc_irqtype = mp_ExtINT;
481 intsrc.mpc_srcbusirq = 0;
482 intsrc.mpc_dstirq = 0; /* 8259A to INTIN0 */
483 MP_intsrc_info(&intsrc);
484 }
485
486
487 static void construct_ioapic_table(int mpc_default_type)
488 {
489 struct mpc_config_ioapic ioapic;
490 struct mpc_config_bus bus;
491
492 bus.mpc_type = MP_BUS;
493 bus.mpc_busid = 0;
494 switch (mpc_default_type) {
495 default:
496 printk(KERN_ERR "???\nUnknown standard configuration %d\n",
497 mpc_default_type);
498 /* fall through */
499 case 1:
500 case 5:
501 memcpy(bus.mpc_bustype, "ISA ", 6);
502 break;
503 case 2:
504 case 6:
505 case 3:
506 memcpy(bus.mpc_bustype, "EISA ", 6);
507 break;
508 case 4:
509 case 7:
510 memcpy(bus.mpc_bustype, "MCA ", 6);
511 }
512 MP_bus_info(&bus);
513 if (mpc_default_type > 4) {
514 bus.mpc_busid = 1;
515 memcpy(bus.mpc_bustype, "PCI ", 6);
516 MP_bus_info(&bus);
517 }
518
519 ioapic.mpc_type = MP_IOAPIC;
520 ioapic.mpc_apicid = 2;
521 ioapic.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
522 ioapic.mpc_flags = MPC_APIC_USABLE;
523 ioapic.mpc_apicaddr = 0xFEC00000;
524 MP_ioapic_info(&ioapic);
525
526 /*
527 * We set up most of the low 16 IO-APIC pins according to MPS rules.
528 */
529 construct_default_ioirq_mptable(mpc_default_type);
530 }
531 #else
532 static inline void construct_ioapic_table(int mpc_default_type) { }
533 #endif
534
535 static inline void __init construct_default_ISA_mptable(int mpc_default_type)
536 {
537 struct mpc_config_processor processor;
538 struct mpc_config_lintsrc lintsrc;
539 int linttypes[2] = { mp_ExtINT, mp_NMI };
540 int i;
541
542 /*
543 * local APIC has default address
544 */
545 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
546
547 /*
548 * 2 CPUs, numbered 0 & 1.
549 */
550 processor.mpc_type = MP_PROCESSOR;
551 /* Either an integrated APIC or a discrete 82489DX. */
552 processor.mpc_apicver = mpc_default_type > 4 ? 0x10 : 0x01;
553 processor.mpc_cpuflag = CPU_ENABLED;
554 processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) |
555 (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
556 processor.mpc_featureflag = boot_cpu_data.x86_capability[0];
557 processor.mpc_reserved[0] = 0;
558 processor.mpc_reserved[1] = 0;
559 for (i = 0; i < 2; i++) {
560 processor.mpc_apicid = i;
561 MP_processor_info(&processor);
562 }
563
564 construct_ioapic_table(mpc_default_type);
565
566 lintsrc.mpc_type = MP_LINTSRC;
567 lintsrc.mpc_irqflag = 0; /* conforming */
568 lintsrc.mpc_srcbusid = 0;
569 lintsrc.mpc_srcbusirq = 0;
570 lintsrc.mpc_destapic = MP_APIC_ALL;
571 for (i = 0; i < 2; i++) {
572 lintsrc.mpc_irqtype = linttypes[i];
573 lintsrc.mpc_destapiclint = i;
574 MP_lintsrc_info(&lintsrc);
575 }
576 }
577
578 static struct intel_mp_floating *mpf_found;
579
580 /*
581 * Scan the memory blocks for an SMP configuration block.
582 */
583 static void __init __get_smp_config(unsigned int early)
584 {
585 struct intel_mp_floating *mpf = mpf_found;
586
587 if (x86_quirks->mach_get_smp_config) {
588 if (x86_quirks->mach_get_smp_config(early))
589 return;
590 }
591 if (acpi_lapic && early)
592 return;
593 /*
594 * ACPI supports both logical (e.g. Hyper-Threading) and physical
595 * processors, where MPS only supports physical.
596 */
597 if (acpi_lapic && acpi_ioapic) {
598 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
599 "information\n");
600 return;
601 } else if (acpi_lapic)
602 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
603 "configuration information\n");
604
605 printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
606 mpf->mpf_specification);
607 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
608 if (mpf->mpf_feature2 & (1 << 7)) {
609 printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
610 pic_mode = 1;
611 } else {
612 printk(KERN_INFO " Virtual Wire compatibility mode.\n");
613 pic_mode = 0;
614 }
615 #endif
616 /*
617 * Now see if we need to read further.
618 */
619 if (mpf->mpf_feature1 != 0) {
620 if (early) {
621 /*
622 * local APIC has default address
623 */
624 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
625 return;
626 }
627
628 printk(KERN_INFO "Default MP configuration #%d\n",
629 mpf->mpf_feature1);
630 construct_default_ISA_mptable(mpf->mpf_feature1);
631
632 } else if (mpf->mpf_physptr) {
633
634 /*
635 * Read the physical hardware table. Anything here will
636 * override the defaults.
637 */
638 if (!smp_read_mpc(phys_to_virt(mpf->mpf_physptr), early)) {
639 #ifdef CONFIG_X86_LOCAL_APIC
640 smp_found_config = 0;
641 #endif
642 printk(KERN_ERR
643 "BIOS bug, MP table errors detected!...\n");
644 printk(KERN_ERR "... disabling SMP support. "
645 "(tell your hw vendor)\n");
646 return;
647 }
648
649 if (early)
650 return;
651 #ifdef CONFIG_X86_IO_APIC
652 /*
653 * If there are no explicit MP IRQ entries, then we are
654 * broken. We set up most of the low 16 IO-APIC pins to
655 * ISA defaults and hope it will work.
656 */
657 if (!mp_irq_entries) {
658 struct mpc_config_bus bus;
659
660 printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
661 "using default mptable. "
662 "(tell your hw vendor)\n");
663
664 bus.mpc_type = MP_BUS;
665 bus.mpc_busid = 0;
666 memcpy(bus.mpc_bustype, "ISA ", 6);
667 MP_bus_info(&bus);
668
669 construct_default_ioirq_mptable(0);
670 }
671 #endif
672 } else
673 BUG();
674
675 if (!early)
676 printk(KERN_INFO "Processors: %d\n", num_processors);
677 /*
678 * Only use the first configuration found.
679 */
680 }
681
682 void __init early_get_smp_config(void)
683 {
684 __get_smp_config(1);
685 }
686
687 void __init get_smp_config(void)
688 {
689 __get_smp_config(0);
690 }
691
692 static int __init smp_scan_config(unsigned long base, unsigned long length,
693 unsigned reserve)
694 {
695 unsigned int *bp = phys_to_virt(base);
696 struct intel_mp_floating *mpf;
697
698 printk(KERN_DEBUG "Scan SMP from %p for %ld bytes.\n", bp, length);
699 BUILD_BUG_ON(sizeof(*mpf) != 16);
700
701 while (length > 0) {
702 mpf = (struct intel_mp_floating *)bp;
703 if ((*bp == SMP_MAGIC_IDENT) &&
704 (mpf->mpf_length == 1) &&
705 !mpf_checksum((unsigned char *)bp, 16) &&
706 ((mpf->mpf_specification == 1)
707 || (mpf->mpf_specification == 4))) {
708 #ifdef CONFIG_X86_LOCAL_APIC
709 smp_found_config = 1;
710 #endif
711 mpf_found = mpf;
712
713 printk(KERN_INFO "found SMP MP-table at [%p] %08lx\n",
714 mpf, virt_to_phys(mpf));
715
716 if (!reserve)
717 return 1;
718 reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
719 BOOTMEM_DEFAULT);
720 if (mpf->mpf_physptr) {
721 unsigned long size = PAGE_SIZE;
722 #ifdef CONFIG_X86_32
723 /*
724 * We cannot access to MPC table to compute
725 * table size yet, as only few megabytes from
726 * the bottom is mapped now.
727 * PC-9800's MPC table places on the very last
728 * of physical memory; so that simply reserving
729 * PAGE_SIZE from mpg->mpf_physptr yields BUG()
730 * in reserve_bootmem.
731 */
732 unsigned long end = max_low_pfn * PAGE_SIZE;
733 if (mpf->mpf_physptr + size > end)
734 size = end - mpf->mpf_physptr;
735 #endif
736 reserve_bootmem_generic(mpf->mpf_physptr, size,
737 BOOTMEM_DEFAULT);
738 }
739
740 return 1;
741 }
742 bp += 4;
743 length -= 16;
744 }
745 return 0;
746 }
747
748 static void __init __find_smp_config(unsigned int reserve)
749 {
750 unsigned int address;
751
752 if (x86_quirks->mach_find_smp_config) {
753 if (x86_quirks->mach_find_smp_config(reserve))
754 return;
755 }
756 /*
757 * FIXME: Linux assumes you have 640K of base ram..
758 * this continues the error...
759 *
760 * 1) Scan the bottom 1K for a signature
761 * 2) Scan the top 1K of base RAM
762 * 3) Scan the 64K of bios
763 */
764 if (smp_scan_config(0x0, 0x400, reserve) ||
765 smp_scan_config(639 * 0x400, 0x400, reserve) ||
766 smp_scan_config(0xF0000, 0x10000, reserve))
767 return;
768 /*
769 * If it is an SMP machine we should know now, unless the
770 * configuration is in an EISA/MCA bus machine with an
771 * extended bios data area.
772 *
773 * there is a real-mode segmented pointer pointing to the
774 * 4K EBDA area at 0x40E, calculate and scan it here.
775 *
776 * NOTE! There are Linux loaders that will corrupt the EBDA
777 * area, and as such this kind of SMP config may be less
778 * trustworthy, simply because the SMP table may have been
779 * stomped on during early boot. These loaders are buggy and
780 * should be fixed.
781 *
782 * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
783 */
784
785 address = get_bios_ebda();
786 if (address)
787 smp_scan_config(address, 0x400, reserve);
788 }
789
790 void __init early_find_smp_config(void)
791 {
792 __find_smp_config(0);
793 }
794
795 void __init find_smp_config(void)
796 {
797 __find_smp_config(1);
798 }
799
800 #ifdef CONFIG_X86_IO_APIC
801 static u8 __initdata irq_used[MAX_IRQ_SOURCES];
802
803 static int __init get_MP_intsrc_index(struct mpc_config_intsrc *m)
804 {
805 int i;
806
807 if (m->mpc_irqtype != mp_INT)
808 return 0;
809
810 if (m->mpc_irqflag != 0x0f)
811 return 0;
812
813 /* not legacy */
814
815 for (i = 0; i < mp_irq_entries; i++) {
816 if (mp_irqs[i].mp_irqtype != mp_INT)
817 continue;
818
819 if (mp_irqs[i].mp_irqflag != 0x0f)
820 continue;
821
822 if (mp_irqs[i].mp_srcbus != m->mpc_srcbus)
823 continue;
824 if (mp_irqs[i].mp_srcbusirq != m->mpc_srcbusirq)
825 continue;
826 if (irq_used[i]) {
827 /* already claimed */
828 return -2;
829 }
830 irq_used[i] = 1;
831 return i;
832 }
833
834 /* not found */
835 return -1;
836 }
837
838 #define SPARE_SLOT_NUM 20
839
840 static struct mpc_config_intsrc __initdata *m_spare[SPARE_SLOT_NUM];
841 #endif
842
843 static int __init replace_intsrc_all(struct mp_config_table *mpc,
844 unsigned long mpc_new_phys,
845 unsigned long mpc_new_length)
846 {
847 #ifdef CONFIG_X86_IO_APIC
848 int i;
849 int nr_m_spare = 0;
850 #endif
851
852 int count = sizeof(*mpc);
853 unsigned char *mpt = ((unsigned char *)mpc) + count;
854
855 printk(KERN_INFO "mpc_length %x\n", mpc->mpc_length);
856 while (count < mpc->mpc_length) {
857 switch (*mpt) {
858 case MP_PROCESSOR:
859 {
860 struct mpc_config_processor *m =
861 (struct mpc_config_processor *)mpt;
862 mpt += sizeof(*m);
863 count += sizeof(*m);
864 break;
865 }
866 case MP_BUS:
867 {
868 struct mpc_config_bus *m =
869 (struct mpc_config_bus *)mpt;
870 mpt += sizeof(*m);
871 count += sizeof(*m);
872 break;
873 }
874 case MP_IOAPIC:
875 {
876 mpt += sizeof(struct mpc_config_ioapic);
877 count += sizeof(struct mpc_config_ioapic);
878 break;
879 }
880 case MP_INTSRC:
881 {
882 #ifdef CONFIG_X86_IO_APIC
883 struct mpc_config_intsrc *m =
884 (struct mpc_config_intsrc *)mpt;
885
886 printk(KERN_INFO "OLD ");
887 print_MP_intsrc_info(m);
888 i = get_MP_intsrc_index(m);
889 if (i > 0) {
890 assign_to_mpc_intsrc(&mp_irqs[i], m);
891 printk(KERN_INFO "NEW ");
892 print_mp_irq_info(&mp_irqs[i]);
893 } else if (!i) {
894 /* legacy, do nothing */
895 } else if (nr_m_spare < SPARE_SLOT_NUM) {
896 /*
897 * not found (-1), or duplicated (-2)
898 * are invalid entries,
899 * we need to use the slot later
900 */
901 m_spare[nr_m_spare] = m;
902 nr_m_spare++;
903 }
904 #endif
905 mpt += sizeof(struct mpc_config_intsrc);
906 count += sizeof(struct mpc_config_intsrc);
907 break;
908 }
909 case MP_LINTSRC:
910 {
911 struct mpc_config_lintsrc *m =
912 (struct mpc_config_lintsrc *)mpt;
913 mpt += sizeof(*m);
914 count += sizeof(*m);
915 break;
916 }
917 default:
918 /* wrong mptable */
919 printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n");
920 printk(KERN_ERR "type %x\n", *mpt);
921 print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
922 1, mpc, mpc->mpc_length, 1);
923 goto out;
924 }
925 }
926
927 #ifdef CONFIG_X86_IO_APIC
928 for (i = 0; i < mp_irq_entries; i++) {
929 if (irq_used[i])
930 continue;
931
932 if (mp_irqs[i].mp_irqtype != mp_INT)
933 continue;
934
935 if (mp_irqs[i].mp_irqflag != 0x0f)
936 continue;
937
938 if (nr_m_spare > 0) {
939 printk(KERN_INFO "*NEW* found ");
940 nr_m_spare--;
941 assign_to_mpc_intsrc(&mp_irqs[i], m_spare[nr_m_spare]);
942 m_spare[nr_m_spare] = NULL;
943 } else {
944 struct mpc_config_intsrc *m =
945 (struct mpc_config_intsrc *)mpt;
946 count += sizeof(struct mpc_config_intsrc);
947 if (!mpc_new_phys) {
948 printk(KERN_INFO "No spare slots, try to append...take your risk, new mpc_length %x\n", count);
949 } else {
950 if (count <= mpc_new_length)
951 printk(KERN_INFO "No spare slots, try to append..., new mpc_length %x\n", count);
952 else {
953 printk(KERN_ERR "mpc_new_length %lx is too small\n", mpc_new_length);
954 goto out;
955 }
956 }
957 assign_to_mpc_intsrc(&mp_irqs[i], m);
958 mpc->mpc_length = count;
959 mpt += sizeof(struct mpc_config_intsrc);
960 }
961 print_mp_irq_info(&mp_irqs[i]);
962 }
963 #endif
964 out:
965 /* update checksum */
966 mpc->mpc_checksum = 0;
967 mpc->mpc_checksum -= mpf_checksum((unsigned char *)mpc,
968 mpc->mpc_length);
969
970 return 0;
971 }
972
973 static int __initdata enable_update_mptable;
974
975 static int __init update_mptable_setup(char *str)
976 {
977 enable_update_mptable = 1;
978 return 0;
979 }
980 early_param("update_mptable", update_mptable_setup);
981
982 static unsigned long __initdata mpc_new_phys;
983 static unsigned long mpc_new_length __initdata = 4096;
984
985 /* alloc_mptable or alloc_mptable=4k */
986 static int __initdata alloc_mptable;
987 static int __init parse_alloc_mptable_opt(char *p)
988 {
989 enable_update_mptable = 1;
990 alloc_mptable = 1;
991 if (!p)
992 return 0;
993 mpc_new_length = memparse(p, &p);
994 return 0;
995 }
996 early_param("alloc_mptable", parse_alloc_mptable_opt);
997
998 void __init early_reserve_e820_mpc_new(void)
999 {
1000 if (enable_update_mptable && alloc_mptable) {
1001 u64 startt = 0;
1002 #ifdef CONFIG_X86_TRAMPOLINE
1003 startt = TRAMPOLINE_BASE;
1004 #endif
1005 mpc_new_phys = early_reserve_e820(startt, mpc_new_length, 4);
1006 }
1007 }
1008
1009 static int __init update_mp_table(void)
1010 {
1011 char str[16];
1012 char oem[10];
1013 struct intel_mp_floating *mpf;
1014 struct mp_config_table *mpc;
1015 struct mp_config_table *mpc_new;
1016
1017 if (!enable_update_mptable)
1018 return 0;
1019
1020 mpf = mpf_found;
1021 if (!mpf)
1022 return 0;
1023
1024 /*
1025 * Now see if we need to go further.
1026 */
1027 if (mpf->mpf_feature1 != 0)
1028 return 0;
1029
1030 if (!mpf->mpf_physptr)
1031 return 0;
1032
1033 mpc = phys_to_virt(mpf->mpf_physptr);
1034
1035 if (!smp_check_mpc(mpc, oem, str))
1036 return 0;
1037
1038 printk(KERN_INFO "mpf: %lx\n", virt_to_phys(mpf));
1039 printk(KERN_INFO "mpf_physptr: %x\n", mpf->mpf_physptr);
1040
1041 if (mpc_new_phys && mpc->mpc_length > mpc_new_length) {
1042 mpc_new_phys = 0;
1043 printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
1044 mpc_new_length);
1045 }
1046
1047 if (!mpc_new_phys) {
1048 unsigned char old, new;
1049 /* check if we can change the postion */
1050 mpc->mpc_checksum = 0;
1051 old = mpf_checksum((unsigned char *)mpc, mpc->mpc_length);
1052 mpc->mpc_checksum = 0xff;
1053 new = mpf_checksum((unsigned char *)mpc, mpc->mpc_length);
1054 if (old == new) {
1055 printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
1056 return 0;
1057 }
1058 printk(KERN_INFO "use in-positon replacing\n");
1059 } else {
1060 mpf->mpf_physptr = mpc_new_phys;
1061 mpc_new = phys_to_virt(mpc_new_phys);
1062 memcpy(mpc_new, mpc, mpc->mpc_length);
1063 mpc = mpc_new;
1064 /* check if we can modify that */
1065 if (mpc_new_phys - mpf->mpf_physptr) {
1066 struct intel_mp_floating *mpf_new;
1067 /* steal 16 bytes from [0, 1k) */
1068 printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
1069 mpf_new = phys_to_virt(0x400 - 16);
1070 memcpy(mpf_new, mpf, 16);
1071 mpf = mpf_new;
1072 mpf->mpf_physptr = mpc_new_phys;
1073 }
1074 mpf->mpf_checksum = 0;
1075 mpf->mpf_checksum -= mpf_checksum((unsigned char *)mpf, 16);
1076 printk(KERN_INFO "mpf_physptr new: %x\n", mpf->mpf_physptr);
1077 }
1078
1079 /*
1080 * only replace the one with mp_INT and
1081 * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW,
1082 * already in mp_irqs , stored by ... and mp_config_acpi_gsi,
1083 * may need pci=routeirq for all coverage
1084 */
1085 replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length);
1086
1087 return 0;
1088 }
1089
1090 late_initcall(update_mp_table);
Linux kernel - Deliverables
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