2 * Intel Multiprocessor Specification 1.1 and 1.4
3 * compliant MP-table parsing routines.
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>
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>
22 #include <asm/mpspec.h>
23 #include <asm/pgalloc.h>
24 #include <asm/io_apic.h>
25 #include <asm/proto.h>
27 #include <asm/bios_ebda.h>
29 #include <asm/trampoline.h>
31 #include <mach_apic.h>
33 #include <mach_apicdef.h>
34 #include <mach_mpparse.h>
38 * Checksum an MP configuration block.
41 static int __init
mpf_checksum(unsigned char *mp
, int len
)
51 #ifdef CONFIG_X86_NUMAQ
54 * Have to match translation table entries to main table entries by counter
55 * hence the mpc_record variable .... can't see a less disgusting way of
58 struct mpc_config_translation
{
59 unsigned char mpc_type
;
60 unsigned char trans_len
;
61 unsigned char trans_type
;
62 unsigned char trans_quad
;
63 unsigned char trans_global
;
64 unsigned char trans_local
;
65 unsigned short trans_reserved
;
69 static int mpc_record
;
70 static struct mpc_config_translation
*translation_table
[MAX_MPC_ENTRY
]
73 static inline int generate_logical_apicid(int quad
, int phys_apicid
)
75 return (quad
<< 4) + (phys_apicid
? phys_apicid
<< 1 : 1);
79 static inline int mpc_apic_id(struct mpc_config_processor
*m
,
80 struct mpc_config_translation
*translation_record
)
82 int quad
= translation_record
->trans_quad
;
83 int logical_apicid
= generate_logical_apicid(quad
, m
->mpc_apicid
);
85 printk(KERN_DEBUG
"Processor #%d %u:%u APIC version %d (quad %d, apic %d)\n",
87 (m
->mpc_cpufeature
& CPU_FAMILY_MASK
) >> 8,
88 (m
->mpc_cpufeature
& CPU_MODEL_MASK
) >> 4,
89 m
->mpc_apicver
, quad
, logical_apicid
);
90 return logical_apicid
;
93 int mp_bus_id_to_node
[MAX_MP_BUSSES
];
95 int mp_bus_id_to_local
[MAX_MP_BUSSES
];
97 static void mpc_oem_bus_info(struct mpc_config_bus
*m
, char *name
,
98 struct mpc_config_translation
*translation
)
100 int quad
= translation
->trans_quad
;
101 int local
= translation
->trans_local
;
103 mp_bus_id_to_node
[m
->mpc_busid
] = quad
;
104 mp_bus_id_to_local
[m
->mpc_busid
] = local
;
105 printk(KERN_INFO
"Bus #%d is %s (node %d)\n",
106 m
->mpc_busid
, name
, quad
);
109 int quad_local_to_mp_bus_id
[NR_CPUS
/4][4];
110 static void mpc_oem_pci_bus(struct mpc_config_bus
*m
,
111 struct mpc_config_translation
*translation
)
113 int quad
= translation
->trans_quad
;
114 int local
= translation
->trans_local
;
116 quad_local_to_mp_bus_id
[quad
][local
] = m
->mpc_busid
;
121 static void __cpuinit
MP_processor_info(struct mpc_config_processor
*m
)
124 char *bootup_cpu
= "";
126 if (!(m
->mpc_cpuflag
& CPU_ENABLED
)) {
130 #ifdef CONFIG_X86_NUMAQ
132 apicid
= mpc_apic_id(m
, translation_table
[mpc_record
]);
134 apicid
= m
->mpc_apicid
;
136 apicid
= m
->mpc_apicid
;
138 if (m
->mpc_cpuflag
& CPU_BOOTPROCESSOR
) {
139 bootup_cpu
= " (Bootup-CPU)";
140 boot_cpu_physical_apicid
= m
->mpc_apicid
;
143 printk(KERN_INFO
"Processor #%d%s\n", m
->mpc_apicid
, bootup_cpu
);
144 generic_processor_info(apicid
, m
->mpc_apicver
);
147 #ifdef CONFIG_X86_IO_APIC
148 static void __init
MP_bus_info(struct mpc_config_bus
*m
)
151 memcpy(str
, m
->mpc_bustype
, 6);
154 #ifdef CONFIG_X86_NUMAQ
156 mpc_oem_bus_info(m
, str
, translation_table
[mpc_record
]);
158 printk(KERN_INFO
"Bus #%d is %s\n", m
->mpc_busid
, str
);
161 #if MAX_MP_BUSSES < 256
162 if (m
->mpc_busid
>= MAX_MP_BUSSES
) {
163 printk(KERN_WARNING
"MP table busid value (%d) for bustype %s "
164 " is too large, max. supported is %d\n",
165 m
->mpc_busid
, str
, MAX_MP_BUSSES
- 1);
170 if (strncmp(str
, BUSTYPE_ISA
, sizeof(BUSTYPE_ISA
) - 1) == 0) {
171 set_bit(m
->mpc_busid
, mp_bus_not_pci
);
172 #if defined(CONFIG_EISA) || defined (CONFIG_MCA)
173 mp_bus_id_to_type
[m
->mpc_busid
] = MP_BUS_ISA
;
175 } else if (strncmp(str
, BUSTYPE_PCI
, sizeof(BUSTYPE_PCI
) - 1) == 0) {
176 #ifdef CONFIG_X86_NUMAQ
178 mpc_oem_pci_bus(m
, translation_table
[mpc_record
]);
180 clear_bit(m
->mpc_busid
, mp_bus_not_pci
);
181 #if defined(CONFIG_EISA) || defined (CONFIG_MCA)
182 mp_bus_id_to_type
[m
->mpc_busid
] = MP_BUS_PCI
;
183 } else if (strncmp(str
, BUSTYPE_EISA
, sizeof(BUSTYPE_EISA
) - 1) == 0) {
184 mp_bus_id_to_type
[m
->mpc_busid
] = MP_BUS_EISA
;
185 } else if (strncmp(str
, BUSTYPE_MCA
, sizeof(BUSTYPE_MCA
) - 1) == 0) {
186 mp_bus_id_to_type
[m
->mpc_busid
] = MP_BUS_MCA
;
189 printk(KERN_WARNING
"Unknown bustype %s - ignoring\n", str
);
193 #ifdef CONFIG_X86_IO_APIC
195 static int bad_ioapic(unsigned long address
)
197 if (nr_ioapics
>= MAX_IO_APICS
) {
198 printk(KERN_ERR
"ERROR: Max # of I/O APICs (%d) exceeded "
199 "(found %d)\n", MAX_IO_APICS
, nr_ioapics
);
200 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
203 printk(KERN_ERR
"WARNING: Bogus (zero) I/O APIC address"
204 " found in table, skipping!\n");
210 static void __init
MP_ioapic_info(struct mpc_config_ioapic
*m
)
212 if (!(m
->mpc_flags
& MPC_APIC_USABLE
))
215 printk(KERN_INFO
"I/O APIC #%d Version %d at 0x%X.\n",
216 m
->mpc_apicid
, m
->mpc_apicver
, m
->mpc_apicaddr
);
218 if (bad_ioapic(m
->mpc_apicaddr
))
221 mp_ioapics
[nr_ioapics
].mp_apicaddr
= m
->mpc_apicaddr
;
222 mp_ioapics
[nr_ioapics
].mp_apicid
= m
->mpc_apicid
;
223 mp_ioapics
[nr_ioapics
].mp_type
= m
->mpc_type
;
224 mp_ioapics
[nr_ioapics
].mp_apicver
= m
->mpc_apicver
;
225 mp_ioapics
[nr_ioapics
].mp_flags
= m
->mpc_flags
;
229 static void print_MP_intsrc_info(struct mpc_config_intsrc
*m
)
231 printk(KERN_CONT
"Int: type %d, pol %d, trig %d, bus %02x,"
232 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
233 m
->mpc_irqtype
, m
->mpc_irqflag
& 3,
234 (m
->mpc_irqflag
>> 2) & 3, m
->mpc_srcbus
,
235 m
->mpc_srcbusirq
, m
->mpc_dstapic
, m
->mpc_dstirq
);
238 static void __init
print_mp_irq_info(struct mp_config_intsrc
*mp_irq
)
240 printk(KERN_CONT
"Int: type %d, pol %d, trig %d, bus %02x,"
241 " IRQ %02x, APIC ID %x, APIC INT %02x\n",
242 mp_irq
->mp_irqtype
, mp_irq
->mp_irqflag
& 3,
243 (mp_irq
->mp_irqflag
>> 2) & 3, mp_irq
->mp_srcbus
,
244 mp_irq
->mp_srcbusirq
, mp_irq
->mp_dstapic
, mp_irq
->mp_dstirq
);
247 static void __init
assign_to_mp_irq(struct mpc_config_intsrc
*m
,
248 struct mp_config_intsrc
*mp_irq
)
250 mp_irq
->mp_dstapic
= m
->mpc_dstapic
;
251 mp_irq
->mp_type
= m
->mpc_type
;
252 mp_irq
->mp_irqtype
= m
->mpc_irqtype
;
253 mp_irq
->mp_irqflag
= m
->mpc_irqflag
;
254 mp_irq
->mp_srcbus
= m
->mpc_srcbus
;
255 mp_irq
->mp_srcbusirq
= m
->mpc_srcbusirq
;
256 mp_irq
->mp_dstirq
= m
->mpc_dstirq
;
259 static void __init
assign_to_mpc_intsrc(struct mp_config_intsrc
*mp_irq
,
260 struct mpc_config_intsrc
*m
)
262 m
->mpc_dstapic
= mp_irq
->mp_dstapic
;
263 m
->mpc_type
= mp_irq
->mp_type
;
264 m
->mpc_irqtype
= mp_irq
->mp_irqtype
;
265 m
->mpc_irqflag
= mp_irq
->mp_irqflag
;
266 m
->mpc_srcbus
= mp_irq
->mp_srcbus
;
267 m
->mpc_srcbusirq
= mp_irq
->mp_srcbusirq
;
268 m
->mpc_dstirq
= mp_irq
->mp_dstirq
;
271 static int __init
mp_irq_mpc_intsrc_cmp(struct mp_config_intsrc
*mp_irq
,
272 struct mpc_config_intsrc
*m
)
274 if (mp_irq
->mp_dstapic
!= m
->mpc_dstapic
)
276 if (mp_irq
->mp_type
!= m
->mpc_type
)
278 if (mp_irq
->mp_irqtype
!= m
->mpc_irqtype
)
280 if (mp_irq
->mp_irqflag
!= m
->mpc_irqflag
)
282 if (mp_irq
->mp_srcbus
!= m
->mpc_srcbus
)
284 if (mp_irq
->mp_srcbusirq
!= m
->mpc_srcbusirq
)
286 if (mp_irq
->mp_dstirq
!= m
->mpc_dstirq
)
292 static void __init
MP_intsrc_info(struct mpc_config_intsrc
*m
)
296 print_MP_intsrc_info(m
);
298 for (i
= 0; i
< mp_irq_entries
; i
++) {
299 if (!mp_irq_mpc_intsrc_cmp(&mp_irqs
[i
], m
))
303 assign_to_mp_irq(m
, &mp_irqs
[mp_irq_entries
]);
304 if (++mp_irq_entries
== MAX_IRQ_SOURCES
)
305 panic("Max # of irq sources exceeded!!\n");
310 static void __init
MP_lintsrc_info(struct mpc_config_lintsrc
*m
)
312 printk(KERN_INFO
"Lint: type %d, pol %d, trig %d, bus %02x,"
313 " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
314 m
->mpc_irqtype
, m
->mpc_irqflag
& 3,
315 (m
->mpc_irqflag
>> 2) & 3, m
->mpc_srcbusid
,
316 m
->mpc_srcbusirq
, m
->mpc_destapic
, m
->mpc_destapiclint
);
319 #ifdef CONFIG_X86_NUMAQ
320 static void __init
MP_translation_info(struct mpc_config_translation
*m
)
323 "Translation: record %d, type %d, quad %d, global %d, local %d\n",
324 mpc_record
, m
->trans_type
, m
->trans_quad
, m
->trans_global
,
327 if (mpc_record
>= MAX_MPC_ENTRY
)
328 printk(KERN_ERR
"MAX_MPC_ENTRY exceeded!\n");
330 translation_table
[mpc_record
] = m
; /* stash this for later */
331 if (m
->trans_quad
< MAX_NUMNODES
&& !node_online(m
->trans_quad
))
332 node_set_online(m
->trans_quad
);
336 * Read/parse the MPC oem tables
339 static void __init
smp_read_mpc_oem(struct mp_config_oemtable
*oemtable
,
340 unsigned short oemsize
)
342 int count
= sizeof(*oemtable
); /* the header size */
343 unsigned char *oemptr
= ((unsigned char *)oemtable
) + count
;
346 printk(KERN_INFO
"Found an OEM MPC table at %8p - parsing it ... \n",
348 if (memcmp(oemtable
->oem_signature
, MPC_OEM_SIGNATURE
, 4)) {
350 "SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
351 oemtable
->oem_signature
[0], oemtable
->oem_signature
[1],
352 oemtable
->oem_signature
[2], oemtable
->oem_signature
[3]);
355 if (mpf_checksum((unsigned char *)oemtable
, oemtable
->oem_length
)) {
356 printk(KERN_WARNING
"SMP oem mptable: checksum error!\n");
359 while (count
< oemtable
->oem_length
) {
363 struct mpc_config_translation
*m
=
364 (struct mpc_config_translation
*)oemptr
;
365 MP_translation_info(m
);
366 oemptr
+= sizeof(*m
);
374 "Unrecognised OEM table entry type! - %d\n",
382 void numaq_mps_oem_check(struct mp_config_table
*mpc
, char *oem
,
385 if (strncmp(oem
, "IBM NUMA", 8))
386 printk("Warning! Not a NUMA-Q system!\n");
391 smp_read_mpc_oem((struct mp_config_oemtable
*)mpc
->mpc_oemptr
,
394 #endif /* CONFIG_X86_NUMAQ */
400 static int __init
smp_check_mpc(struct mp_config_table
*mpc
, char *oem
,
404 if (memcmp(mpc
->mpc_signature
, MPC_SIGNATURE
, 4)) {
405 printk(KERN_ERR
"MPTABLE: bad signature [%c%c%c%c]!\n",
406 mpc
->mpc_signature
[0], mpc
->mpc_signature
[1],
407 mpc
->mpc_signature
[2], mpc
->mpc_signature
[3]);
410 if (mpf_checksum((unsigned char *)mpc
, mpc
->mpc_length
)) {
411 printk(KERN_ERR
"MPTABLE: checksum error!\n");
414 if (mpc
->mpc_spec
!= 0x01 && mpc
->mpc_spec
!= 0x04) {
415 printk(KERN_ERR
"MPTABLE: bad table version (%d)!!\n",
419 if (!mpc
->mpc_lapic
) {
420 printk(KERN_ERR
"MPTABLE: null local APIC address!\n");
423 memcpy(oem
, mpc
->mpc_oem
, 8);
425 printk(KERN_INFO
"MPTABLE: OEM ID: %s\n", oem
);
427 memcpy(str
, mpc
->mpc_productid
, 12);
430 printk(KERN_INFO
"MPTABLE: Product ID: %s\n", str
);
432 printk(KERN_INFO
"MPTABLE: APIC at: 0x%X\n", mpc
->mpc_lapic
);
437 static int __init
smp_read_mpc(struct mp_config_table
*mpc
, unsigned early
)
442 int count
= sizeof(*mpc
);
443 unsigned char *mpt
= ((unsigned char *)mpc
) + count
;
445 if (!smp_check_mpc(mpc
, oem
, str
))
450 * need to make sure summit and es7000's mps_oem_check is safe to be
451 * called early via genericarch 's mps_oem_check
454 #ifdef CONFIG_X86_NUMAQ
455 numaq_mps_oem_check(mpc
, oem
, str
);
458 mps_oem_check(mpc
, oem
, str
);
461 /* save the local APIC address, it might be non-default */
463 mp_lapic_addr
= mpc
->mpc_lapic
;
469 * Now process the configuration blocks.
471 #ifdef CONFIG_X86_NUMAQ
474 while (count
< mpc
->mpc_length
) {
478 struct mpc_config_processor
*m
=
479 (struct mpc_config_processor
*)mpt
;
480 /* ACPI may have already provided this data */
482 MP_processor_info(m
);
489 struct mpc_config_bus
*m
=
490 (struct mpc_config_bus
*)mpt
;
491 #ifdef CONFIG_X86_IO_APIC
500 #ifdef CONFIG_X86_IO_APIC
501 struct mpc_config_ioapic
*m
=
502 (struct mpc_config_ioapic
*)mpt
;
505 mpt
+= sizeof(struct mpc_config_ioapic
);
506 count
+= sizeof(struct mpc_config_ioapic
);
511 #ifdef CONFIG_X86_IO_APIC
512 struct mpc_config_intsrc
*m
=
513 (struct mpc_config_intsrc
*)mpt
;
517 mpt
+= sizeof(struct mpc_config_intsrc
);
518 count
+= sizeof(struct mpc_config_intsrc
);
523 struct mpc_config_lintsrc
*m
=
524 (struct mpc_config_lintsrc
*)mpt
;
532 printk(KERN_ERR
"Your mptable is wrong, contact your HW vendor!\n");
533 printk(KERN_ERR
"type %x\n", *mpt
);
534 print_hex_dump(KERN_ERR
, " ", DUMP_PREFIX_ADDRESS
, 16,
535 1, mpc
, mpc
->mpc_length
, 1);
536 count
= mpc
->mpc_length
;
539 #ifdef CONFIG_X86_NUMAQ
544 #ifdef CONFIG_X86_GENERICARCH
545 generic_bigsmp_probe();
548 setup_apic_routing();
550 printk(KERN_ERR
"MPTABLE: no processors registered!\n");
551 return num_processors
;
554 #ifdef CONFIG_X86_IO_APIC
556 static int __init
ELCR_trigger(unsigned int irq
)
560 port
= 0x4d0 + (irq
>> 3);
561 return (inb(port
) >> (irq
& 7)) & 1;
564 static void __init
construct_default_ioirq_mptable(int mpc_default_type
)
566 struct mpc_config_intsrc intsrc
;
568 int ELCR_fallback
= 0;
570 intsrc
.mpc_type
= MP_INTSRC
;
571 intsrc
.mpc_irqflag
= 0; /* conforming */
572 intsrc
.mpc_srcbus
= 0;
573 intsrc
.mpc_dstapic
= mp_ioapics
[0].mp_apicid
;
575 intsrc
.mpc_irqtype
= mp_INT
;
578 * If true, we have an ISA/PCI system with no IRQ entries
579 * in the MP table. To prevent the PCI interrupts from being set up
580 * incorrectly, we try to use the ELCR. The sanity check to see if
581 * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
582 * never be level sensitive, so we simply see if the ELCR agrees.
583 * If it does, we assume it's valid.
585 if (mpc_default_type
== 5) {
586 printk(KERN_INFO
"ISA/PCI bus type with no IRQ information... "
587 "falling back to ELCR\n");
589 if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
591 printk(KERN_ERR
"ELCR contains invalid data... "
595 "Using ELCR to identify PCI interrupts\n");
600 for (i
= 0; i
< 16; i
++) {
601 switch (mpc_default_type
) {
603 if (i
== 0 || i
== 13)
604 continue; /* IRQ0 & IRQ13 not connected */
608 continue; /* IRQ2 is never connected */
613 * If the ELCR indicates a level-sensitive interrupt, we
614 * copy that information over to the MP table in the
615 * irqflag field (level sensitive, active high polarity).
618 intsrc
.mpc_irqflag
= 13;
620 intsrc
.mpc_irqflag
= 0;
623 intsrc
.mpc_srcbusirq
= i
;
624 intsrc
.mpc_dstirq
= i
? i
: 2; /* IRQ0 to INTIN2 */
625 MP_intsrc_info(&intsrc
);
628 intsrc
.mpc_irqtype
= mp_ExtINT
;
629 intsrc
.mpc_srcbusirq
= 0;
630 intsrc
.mpc_dstirq
= 0; /* 8259A to INTIN0 */
631 MP_intsrc_info(&intsrc
);
635 static void construct_ioapic_table(int mpc_default_type
)
637 struct mpc_config_ioapic ioapic
;
638 struct mpc_config_bus bus
;
640 bus
.mpc_type
= MP_BUS
;
642 switch (mpc_default_type
) {
644 printk(KERN_ERR
"???\nUnknown standard configuration %d\n",
649 memcpy(bus
.mpc_bustype
, "ISA ", 6);
654 memcpy(bus
.mpc_bustype
, "EISA ", 6);
658 memcpy(bus
.mpc_bustype
, "MCA ", 6);
661 if (mpc_default_type
> 4) {
663 memcpy(bus
.mpc_bustype
, "PCI ", 6);
667 ioapic
.mpc_type
= MP_IOAPIC
;
668 ioapic
.mpc_apicid
= 2;
669 ioapic
.mpc_apicver
= mpc_default_type
> 4 ? 0x10 : 0x01;
670 ioapic
.mpc_flags
= MPC_APIC_USABLE
;
671 ioapic
.mpc_apicaddr
= 0xFEC00000;
672 MP_ioapic_info(&ioapic
);
675 * We set up most of the low 16 IO-APIC pins according to MPS rules.
677 construct_default_ioirq_mptable(mpc_default_type
);
680 static inline void construct_ioapic_table(int mpc_default_type
) { }
683 static inline void __init
construct_default_ISA_mptable(int mpc_default_type
)
685 struct mpc_config_processor processor
;
686 struct mpc_config_lintsrc lintsrc
;
687 int linttypes
[2] = { mp_ExtINT
, mp_NMI
};
691 * local APIC has default address
693 mp_lapic_addr
= APIC_DEFAULT_PHYS_BASE
;
696 * 2 CPUs, numbered 0 & 1.
698 processor
.mpc_type
= MP_PROCESSOR
;
699 /* Either an integrated APIC or a discrete 82489DX. */
700 processor
.mpc_apicver
= mpc_default_type
> 4 ? 0x10 : 0x01;
701 processor
.mpc_cpuflag
= CPU_ENABLED
;
702 processor
.mpc_cpufeature
= (boot_cpu_data
.x86
<< 8) |
703 (boot_cpu_data
.x86_model
<< 4) | boot_cpu_data
.x86_mask
;
704 processor
.mpc_featureflag
= boot_cpu_data
.x86_capability
[0];
705 processor
.mpc_reserved
[0] = 0;
706 processor
.mpc_reserved
[1] = 0;
707 for (i
= 0; i
< 2; i
++) {
708 processor
.mpc_apicid
= i
;
709 MP_processor_info(&processor
);
712 construct_ioapic_table(mpc_default_type
);
714 lintsrc
.mpc_type
= MP_LINTSRC
;
715 lintsrc
.mpc_irqflag
= 0; /* conforming */
716 lintsrc
.mpc_srcbusid
= 0;
717 lintsrc
.mpc_srcbusirq
= 0;
718 lintsrc
.mpc_destapic
= MP_APIC_ALL
;
719 for (i
= 0; i
< 2; i
++) {
720 lintsrc
.mpc_irqtype
= linttypes
[i
];
721 lintsrc
.mpc_destapiclint
= i
;
722 MP_lintsrc_info(&lintsrc
);
726 static struct intel_mp_floating
*mpf_found
;
729 * Machine specific quirk for finding the SMP config before other setup
730 * activities destroy the table:
732 int (*mach_get_smp_config_quirk
)(unsigned int early
);
735 * Scan the memory blocks for an SMP configuration block.
737 static void __init
__get_smp_config(unsigned int early
)
739 struct intel_mp_floating
*mpf
= mpf_found
;
741 if (mach_get_smp_config_quirk
) {
742 if (mach_get_smp_config_quirk(early
))
745 if (acpi_lapic
&& early
)
748 * ACPI supports both logical (e.g. Hyper-Threading) and physical
749 * processors, where MPS only supports physical.
751 if (acpi_lapic
&& acpi_ioapic
) {
752 printk(KERN_INFO
"Using ACPI (MADT) for SMP configuration "
755 } else if (acpi_lapic
)
756 printk(KERN_INFO
"Using ACPI for processor (LAPIC) "
757 "configuration information\n");
759 printk(KERN_INFO
"Intel MultiProcessor Specification v1.%d\n",
760 mpf
->mpf_specification
);
761 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
762 if (mpf
->mpf_feature2
& (1 << 7)) {
763 printk(KERN_INFO
" IMCR and PIC compatibility mode.\n");
766 printk(KERN_INFO
" Virtual Wire compatibility mode.\n");
771 * Now see if we need to read further.
773 if (mpf
->mpf_feature1
!= 0) {
776 * local APIC has default address
778 mp_lapic_addr
= APIC_DEFAULT_PHYS_BASE
;
782 printk(KERN_INFO
"Default MP configuration #%d\n",
784 construct_default_ISA_mptable(mpf
->mpf_feature1
);
786 } else if (mpf
->mpf_physptr
) {
789 * Read the physical hardware table. Anything here will
790 * override the defaults.
792 if (!smp_read_mpc(phys_to_virt(mpf
->mpf_physptr
), early
)) {
793 #ifdef CONFIG_X86_LOCAL_APIC
794 smp_found_config
= 0;
797 "BIOS bug, MP table errors detected!...\n");
798 printk(KERN_ERR
"... disabling SMP support. "
799 "(tell your hw vendor)\n");
805 #ifdef CONFIG_X86_IO_APIC
807 * If there are no explicit MP IRQ entries, then we are
808 * broken. We set up most of the low 16 IO-APIC pins to
809 * ISA defaults and hope it will work.
811 if (!mp_irq_entries
) {
812 struct mpc_config_bus bus
;
814 printk(KERN_ERR
"BIOS bug, no explicit IRQ entries, "
815 "using default mptable. "
816 "(tell your hw vendor)\n");
818 bus
.mpc_type
= MP_BUS
;
820 memcpy(bus
.mpc_bustype
, "ISA ", 6);
823 construct_default_ioirq_mptable(0);
830 printk(KERN_INFO
"Processors: %d\n", num_processors
);
832 * Only use the first configuration found.
836 void __init
early_get_smp_config(void)
841 void __init
get_smp_config(void)
846 static int __init
smp_scan_config(unsigned long base
, unsigned long length
,
849 unsigned int *bp
= phys_to_virt(base
);
850 struct intel_mp_floating
*mpf
;
852 printk(KERN_DEBUG
"Scan SMP from %p for %ld bytes.\n", bp
, length
);
853 BUILD_BUG_ON(sizeof(*mpf
) != 16);
856 mpf
= (struct intel_mp_floating
*)bp
;
857 if ((*bp
== SMP_MAGIC_IDENT
) &&
858 (mpf
->mpf_length
== 1) &&
859 !mpf_checksum((unsigned char *)bp
, 16) &&
860 ((mpf
->mpf_specification
== 1)
861 || (mpf
->mpf_specification
== 4))) {
862 #ifdef CONFIG_X86_LOCAL_APIC
863 smp_found_config
= 1;
867 printk(KERN_INFO
"found SMP MP-table at [%p] %08lx\n",
868 mpf
, virt_to_phys(mpf
));
872 reserve_bootmem_generic(virt_to_phys(mpf
), PAGE_SIZE
,
874 if (mpf
->mpf_physptr
) {
875 unsigned long size
= PAGE_SIZE
;
878 * We cannot access to MPC table to compute
879 * table size yet, as only few megabytes from
880 * the bottom is mapped now.
881 * PC-9800's MPC table places on the very last
882 * of physical memory; so that simply reserving
883 * PAGE_SIZE from mpg->mpf_physptr yields BUG()
884 * in reserve_bootmem.
886 unsigned long end
= max_low_pfn
* PAGE_SIZE
;
887 if (mpf
->mpf_physptr
+ size
> end
)
888 size
= end
- mpf
->mpf_physptr
;
890 reserve_bootmem_generic(mpf
->mpf_physptr
, size
,
902 int (*mach_find_smp_config_quirk
)(unsigned int reserve
);
904 static void __init
__find_smp_config(unsigned int reserve
)
906 unsigned int address
;
908 if (mach_find_smp_config_quirk
) {
909 if (mach_find_smp_config_quirk(reserve
))
913 * FIXME: Linux assumes you have 640K of base ram..
914 * this continues the error...
916 * 1) Scan the bottom 1K for a signature
917 * 2) Scan the top 1K of base RAM
918 * 3) Scan the 64K of bios
920 if (smp_scan_config(0x0, 0x400, reserve
) ||
921 smp_scan_config(639 * 0x400, 0x400, reserve
) ||
922 smp_scan_config(0xF0000, 0x10000, reserve
))
925 * If it is an SMP machine we should know now, unless the
926 * configuration is in an EISA/MCA bus machine with an
927 * extended bios data area.
929 * there is a real-mode segmented pointer pointing to the
930 * 4K EBDA area at 0x40E, calculate and scan it here.
932 * NOTE! There are Linux loaders that will corrupt the EBDA
933 * area, and as such this kind of SMP config may be less
934 * trustworthy, simply because the SMP table may have been
935 * stomped on during early boot. These loaders are buggy and
938 * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
941 address
= get_bios_ebda();
943 smp_scan_config(address
, 0x400, reserve
);
946 void __init
early_find_smp_config(void)
948 __find_smp_config(0);
951 void __init
find_smp_config(void)
953 __find_smp_config(1);
956 #ifdef CONFIG_X86_IO_APIC
957 static u8 __initdata irq_used
[MAX_IRQ_SOURCES
];
959 static int __init
get_MP_intsrc_index(struct mpc_config_intsrc
*m
)
963 if (m
->mpc_irqtype
!= mp_INT
)
966 if (m
->mpc_irqflag
!= 0x0f)
971 for (i
= 0; i
< mp_irq_entries
; i
++) {
972 if (mp_irqs
[i
].mp_irqtype
!= mp_INT
)
975 if (mp_irqs
[i
].mp_irqflag
!= 0x0f)
978 if (mp_irqs
[i
].mp_srcbus
!= m
->mpc_srcbus
)
980 if (mp_irqs
[i
].mp_srcbusirq
!= m
->mpc_srcbusirq
)
983 /* already claimed */
994 #define SPARE_SLOT_NUM 20
996 static struct mpc_config_intsrc __initdata
*m_spare
[SPARE_SLOT_NUM
];
999 static int __init
replace_intsrc_all(struct mp_config_table
*mpc
,
1000 unsigned long mpc_new_phys
,
1001 unsigned long mpc_new_length
)
1003 #ifdef CONFIG_X86_IO_APIC
1008 int count
= sizeof(*mpc
);
1009 unsigned char *mpt
= ((unsigned char *)mpc
) + count
;
1011 printk(KERN_INFO
"mpc_length %x\n", mpc
->mpc_length
);
1012 while (count
< mpc
->mpc_length
) {
1016 struct mpc_config_processor
*m
=
1017 (struct mpc_config_processor
*)mpt
;
1019 count
+= sizeof(*m
);
1024 struct mpc_config_bus
*m
=
1025 (struct mpc_config_bus
*)mpt
;
1027 count
+= sizeof(*m
);
1032 mpt
+= sizeof(struct mpc_config_ioapic
);
1033 count
+= sizeof(struct mpc_config_ioapic
);
1038 #ifdef CONFIG_X86_IO_APIC
1039 struct mpc_config_intsrc
*m
=
1040 (struct mpc_config_intsrc
*)mpt
;
1042 printk(KERN_INFO
"OLD ");
1043 print_MP_intsrc_info(m
);
1044 i
= get_MP_intsrc_index(m
);
1046 assign_to_mpc_intsrc(&mp_irqs
[i
], m
);
1047 printk(KERN_INFO
"NEW ");
1048 print_mp_irq_info(&mp_irqs
[i
]);
1050 /* legacy, do nothing */
1051 } else if (nr_m_spare
< SPARE_SLOT_NUM
) {
1053 * not found (-1), or duplicated (-2)
1054 * are invalid entries,
1055 * we need to use the slot later
1057 m_spare
[nr_m_spare
] = m
;
1061 mpt
+= sizeof(struct mpc_config_intsrc
);
1062 count
+= sizeof(struct mpc_config_intsrc
);
1067 struct mpc_config_lintsrc
*m
=
1068 (struct mpc_config_lintsrc
*)mpt
;
1070 count
+= sizeof(*m
);
1075 printk(KERN_ERR
"Your mptable is wrong, contact your HW vendor!\n");
1076 printk(KERN_ERR
"type %x\n", *mpt
);
1077 print_hex_dump(KERN_ERR
, " ", DUMP_PREFIX_ADDRESS
, 16,
1078 1, mpc
, mpc
->mpc_length
, 1);
1083 #ifdef CONFIG_X86_IO_APIC
1084 for (i
= 0; i
< mp_irq_entries
; i
++) {
1088 if (mp_irqs
[i
].mp_irqtype
!= mp_INT
)
1091 if (mp_irqs
[i
].mp_irqflag
!= 0x0f)
1094 if (nr_m_spare
> 0) {
1095 printk(KERN_INFO
"*NEW* found ");
1097 assign_to_mpc_intsrc(&mp_irqs
[i
], m_spare
[nr_m_spare
]);
1098 m_spare
[nr_m_spare
] = NULL
;
1100 struct mpc_config_intsrc
*m
=
1101 (struct mpc_config_intsrc
*)mpt
;
1102 count
+= sizeof(struct mpc_config_intsrc
);
1103 if (!mpc_new_phys
) {
1104 printk(KERN_INFO
"No spare slots, try to append...take your risk, new mpc_length %x\n", count
);
1106 if (count
<= mpc_new_length
)
1107 printk(KERN_INFO
"No spare slots, try to append..., new mpc_length %x\n", count
);
1109 printk(KERN_ERR
"mpc_new_length %lx is too small\n", mpc_new_length
);
1113 assign_to_mpc_intsrc(&mp_irqs
[i
], m
);
1114 mpc
->mpc_length
= count
;
1115 mpt
+= sizeof(struct mpc_config_intsrc
);
1117 print_mp_irq_info(&mp_irqs
[i
]);
1121 /* update checksum */
1122 mpc
->mpc_checksum
= 0;
1123 mpc
->mpc_checksum
-= mpf_checksum((unsigned char *)mpc
,
1129 static int __initdata enable_update_mptable
;
1131 static int __init
update_mptable_setup(char *str
)
1133 enable_update_mptable
= 1;
1136 early_param("update_mptable", update_mptable_setup
);
1138 static unsigned long __initdata mpc_new_phys
;
1139 static unsigned long mpc_new_length __initdata
= 4096;
1141 /* alloc_mptable or alloc_mptable=4k */
1142 static int __initdata alloc_mptable
;
1143 static int __init
parse_alloc_mptable_opt(char *p
)
1145 enable_update_mptable
= 1;
1149 mpc_new_length
= memparse(p
, &p
);
1152 early_param("alloc_mptable", parse_alloc_mptable_opt
);
1154 void __init
early_reserve_e820_mpc_new(void)
1156 if (enable_update_mptable
&& alloc_mptable
) {
1158 #ifdef CONFIG_X86_TRAMPOLINE
1159 startt
= TRAMPOLINE_BASE
;
1161 mpc_new_phys
= early_reserve_e820(startt
, mpc_new_length
, 4);
1165 static int __init
update_mp_table(void)
1169 struct intel_mp_floating
*mpf
;
1170 struct mp_config_table
*mpc
;
1171 struct mp_config_table
*mpc_new
;
1173 if (!enable_update_mptable
)
1181 * Now see if we need to go further.
1183 if (mpf
->mpf_feature1
!= 0)
1186 if (!mpf
->mpf_physptr
)
1189 mpc
= phys_to_virt(mpf
->mpf_physptr
);
1191 if (!smp_check_mpc(mpc
, oem
, str
))
1194 printk(KERN_INFO
"mpf: %lx\n", virt_to_phys(mpf
));
1195 printk(KERN_INFO
"mpf_physptr: %x\n", mpf
->mpf_physptr
);
1197 if (mpc_new_phys
&& mpc
->mpc_length
> mpc_new_length
) {
1199 printk(KERN_INFO
"mpc_new_length is %ld, please use alloc_mptable=8k\n",
1203 if (!mpc_new_phys
) {
1204 unsigned char old
, new;
1205 /* check if we can change the postion */
1206 mpc
->mpc_checksum
= 0;
1207 old
= mpf_checksum((unsigned char *)mpc
, mpc
->mpc_length
);
1208 mpc
->mpc_checksum
= 0xff;
1209 new = mpf_checksum((unsigned char *)mpc
, mpc
->mpc_length
);
1211 printk(KERN_INFO
"mpc is readonly, please try alloc_mptable instead\n");
1214 printk(KERN_INFO
"use in-positon replacing\n");
1216 mpf
->mpf_physptr
= mpc_new_phys
;
1217 mpc_new
= phys_to_virt(mpc_new_phys
);
1218 memcpy(mpc_new
, mpc
, mpc
->mpc_length
);
1220 /* check if we can modify that */
1221 if (mpc_new_phys
- mpf
->mpf_physptr
) {
1222 struct intel_mp_floating
*mpf_new
;
1223 /* steal 16 bytes from [0, 1k) */
1224 printk(KERN_INFO
"mpf new: %x\n", 0x400 - 16);
1225 mpf_new
= phys_to_virt(0x400 - 16);
1226 memcpy(mpf_new
, mpf
, 16);
1228 mpf
->mpf_physptr
= mpc_new_phys
;
1230 mpf
->mpf_checksum
= 0;
1231 mpf
->mpf_checksum
-= mpf_checksum((unsigned char *)mpf
, 16);
1232 printk(KERN_INFO
"mpf_physptr new: %x\n", mpf
->mpf_physptr
);
1236 * only replace the one with mp_INT and
1237 * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW,
1238 * already in mp_irqs , stored by ... and mp_config_acpi_gsi,
1239 * may need pci=routeirq for all coverage
1241 replace_intsrc_all(mpc
, mpc_new_phys
, mpc_new_length
);
1246 late_initcall(update_mp_table
);