]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
11113f84 | 2 | * Intel Multiprocessor Specification 1.1 and 1.4 |
1da177e4 LT |
3 | * compliant MP-table parsing routines. |
4 | * | |
87c6fe26 | 5 | * (c) 1995 Alan Cox, Building #3 <alan@lxorguk.ukuu.org.uk> |
8f47e163 | 6 | * (c) 1998, 1999, 2000, 2009 Ingo Molnar <mingo@redhat.com> |
85bdddec | 7 | * (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de> |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/mm.h> | |
1da177e4 | 11 | #include <linux/init.h> |
1da177e4 | 12 | #include <linux/delay.h> |
1da177e4 | 13 | #include <linux/bootmem.h> |
1da177e4 LT |
14 | #include <linux/kernel_stat.h> |
15 | #include <linux/mc146818rtc.h> | |
16 | #include <linux/bitops.h> | |
85bdddec AS |
17 | #include <linux/acpi.h> |
18 | #include <linux/module.h> | |
103ceffb | 19 | #include <linux/smp.h> |
629e15d2 | 20 | #include <linux/pci.h> |
1da177e4 | 21 | |
1da177e4 LT |
22 | #include <asm/mtrr.h> |
23 | #include <asm/mpspec.h> | |
85bdddec | 24 | #include <asm/pgalloc.h> |
1da177e4 | 25 | #include <asm/io_apic.h> |
85bdddec | 26 | #include <asm/proto.h> |
ce3fe6b2 | 27 | #include <asm/bios_ebda.h> |
2944e16b YL |
28 | #include <asm/e820.h> |
29 | #include <asm/trampoline.h> | |
3c9cb6de | 30 | #include <asm/setup.h> |
4884d8e6 | 31 | #include <asm/smp.h> |
1da177e4 | 32 | |
7b6aa335 | 33 | #include <asm/apic.h> |
1da177e4 LT |
34 | /* |
35 | * Checksum an MP configuration block. | |
36 | */ | |
37 | ||
38 | static int __init mpf_checksum(unsigned char *mp, int len) | |
39 | { | |
40 | int sum = 0; | |
41 | ||
42 | while (len--) | |
43 | sum += *mp++; | |
44 | ||
45 | return sum & 0xFF; | |
46 | } | |
47 | ||
fd6c6661 TG |
48 | int __init default_mpc_apic_id(struct mpc_cpu *m) |
49 | { | |
50 | return m->apicid; | |
51 | } | |
52 | ||
f4f21b71 | 53 | static void __init MP_processor_info(struct mpc_cpu *m) |
c853c676 AS |
54 | { |
55 | int apicid; | |
746f2244 | 56 | char *bootup_cpu = ""; |
c853c676 | 57 | |
c4563826 | 58 | if (!(m->cpuflag & CPU_ENABLED)) { |
7b1292e2 | 59 | disabled_cpus++; |
1da177e4 | 60 | return; |
7b1292e2 | 61 | } |
64898a8b | 62 | |
fd6c6661 | 63 | apicid = x86_init.mpparse.mpc_apic_id(m); |
64898a8b | 64 | |
c4563826 | 65 | if (m->cpuflag & CPU_BOOTPROCESSOR) { |
746f2244 | 66 | bootup_cpu = " (Bootup-CPU)"; |
c4563826 | 67 | boot_cpu_physical_apicid = m->apicid; |
1da177e4 LT |
68 | } |
69 | ||
c4563826 JSR |
70 | printk(KERN_INFO "Processor #%d%s\n", m->apicid, bootup_cpu); |
71 | generic_processor_info(apicid, m->apicver); | |
1da177e4 LT |
72 | } |
73 | ||
85cc35fa | 74 | #ifdef CONFIG_X86_IO_APIC |
90e1c696 | 75 | void __init default_mpc_oem_bus_info(struct mpc_bus *m, char *str) |
1da177e4 | 76 | { |
d4c715fa | 77 | memcpy(str, m->bustype, 6); |
1da177e4 | 78 | str[6] = 0; |
90e1c696 TG |
79 | apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str); |
80 | } | |
1da177e4 | 81 | |
90e1c696 TG |
82 | static void __init MP_bus_info(struct mpc_bus *m) |
83 | { | |
84 | char str[7]; | |
1da177e4 | 85 | |
90e1c696 | 86 | x86_init.mpparse.mpc_oem_bus_info(m, str); |
1da177e4 | 87 | |
5e4edbb7 | 88 | #if MAX_MP_BUSSES < 256 |
d4c715fa | 89 | if (m->busid >= MAX_MP_BUSSES) { |
c0ec31ad | 90 | printk(KERN_WARNING "MP table busid value (%d) for bustype %s " |
4ef81297 | 91 | " is too large, max. supported is %d\n", |
d4c715fa | 92 | m->busid, str, MAX_MP_BUSSES - 1); |
c0ec31ad RD |
93 | return; |
94 | } | |
5e4edbb7 | 95 | #endif |
c0ec31ad | 96 | |
f8924e77 | 97 | if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) { |
d4c715fa | 98 | set_bit(m->busid, mp_bus_not_pci); |
103ceffb | 99 | #if defined(CONFIG_EISA) || defined(CONFIG_MCA) |
d4c715fa | 100 | mp_bus_id_to_type[m->busid] = MP_BUS_ISA; |
f8924e77 AS |
101 | #endif |
102 | } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) { | |
52fdb568 TG |
103 | if (x86_init.mpparse.mpc_oem_pci_bus) |
104 | x86_init.mpparse.mpc_oem_pci_bus(m); | |
64898a8b | 105 | |
d4c715fa | 106 | clear_bit(m->busid, mp_bus_not_pci); |
103ceffb | 107 | #if defined(CONFIG_EISA) || defined(CONFIG_MCA) |
d4c715fa | 108 | mp_bus_id_to_type[m->busid] = MP_BUS_PCI; |
4ef81297 | 109 | } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) { |
d4c715fa | 110 | mp_bus_id_to_type[m->busid] = MP_BUS_EISA; |
4ef81297 | 111 | } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) { |
d4c715fa | 112 | mp_bus_id_to_type[m->busid] = MP_BUS_MCA; |
c0a282c2 | 113 | #endif |
f8924e77 AS |
114 | } else |
115 | printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str); | |
1da177e4 | 116 | } |
61048c63 | 117 | |
857033a6 AS |
118 | static int bad_ioapic(unsigned long address) |
119 | { | |
120 | if (nr_ioapics >= MAX_IO_APICS) { | |
121 | printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " | |
122 | "(found %d)\n", MAX_IO_APICS, nr_ioapics); | |
123 | panic("Recompile kernel with bigger MAX_IO_APICS!\n"); | |
124 | } | |
125 | if (!address) { | |
126 | printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" | |
127 | " found in table, skipping!\n"); | |
128 | return 1; | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
2b85b5fb | 133 | static void __init MP_ioapic_info(struct mpc_ioapic *m) |
1da177e4 | 134 | { |
5df82c7d | 135 | if (!(m->flags & MPC_APIC_USABLE)) |
1da177e4 LT |
136 | return; |
137 | ||
64883ab0 | 138 | printk(KERN_INFO "I/O APIC #%d Version %d at 0x%X.\n", |
5df82c7d | 139 | m->apicid, m->apicver, m->apicaddr); |
857033a6 | 140 | |
5df82c7d | 141 | if (bad_ioapic(m->apicaddr)) |
1da177e4 | 142 | return; |
857033a6 | 143 | |
b5ba7e6d JSR |
144 | mp_ioapics[nr_ioapics].apicaddr = m->apicaddr; |
145 | mp_ioapics[nr_ioapics].apicid = m->apicid; | |
146 | mp_ioapics[nr_ioapics].type = m->type; | |
147 | mp_ioapics[nr_ioapics].apicver = m->apicver; | |
148 | mp_ioapics[nr_ioapics].flags = m->flags; | |
1da177e4 LT |
149 | nr_ioapics++; |
150 | } | |
151 | ||
540d4e72 | 152 | static void print_MP_intsrc_info(struct mpc_intsrc *m) |
1da177e4 | 153 | { |
eeb0d7d1 | 154 | apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x," |
1da177e4 | 155 | " IRQ %02x, APIC ID %x, APIC INT %02x\n", |
e253b396 JSR |
156 | m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbus, |
157 | m->srcbusirq, m->dstapic, m->dstirq); | |
2944e16b YL |
158 | } |
159 | ||
c2c21745 | 160 | static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq) |
2944e16b | 161 | { |
eeb0d7d1 | 162 | apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x," |
2944e16b | 163 | " IRQ %02x, APIC ID %x, APIC INT %02x\n", |
c2c21745 JSR |
164 | mp_irq->irqtype, mp_irq->irqflag & 3, |
165 | (mp_irq->irqflag >> 2) & 3, mp_irq->srcbus, | |
166 | mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq); | |
2944e16b YL |
167 | } |
168 | ||
540d4e72 | 169 | static void __init assign_to_mp_irq(struct mpc_intsrc *m, |
c2c21745 | 170 | struct mpc_intsrc *mp_irq) |
2944e16b | 171 | { |
c2c21745 JSR |
172 | mp_irq->dstapic = m->dstapic; |
173 | mp_irq->type = m->type; | |
174 | mp_irq->irqtype = m->irqtype; | |
175 | mp_irq->irqflag = m->irqflag; | |
176 | mp_irq->srcbus = m->srcbus; | |
177 | mp_irq->srcbusirq = m->srcbusirq; | |
178 | mp_irq->dstirq = m->dstirq; | |
2944e16b YL |
179 | } |
180 | ||
c2c21745 | 181 | static void __init assign_to_mpc_intsrc(struct mpc_intsrc *mp_irq, |
540d4e72 | 182 | struct mpc_intsrc *m) |
2944e16b | 183 | { |
c2c21745 JSR |
184 | m->dstapic = mp_irq->dstapic; |
185 | m->type = mp_irq->type; | |
186 | m->irqtype = mp_irq->irqtype; | |
187 | m->irqflag = mp_irq->irqflag; | |
188 | m->srcbus = mp_irq->srcbus; | |
189 | m->srcbusirq = mp_irq->srcbusirq; | |
190 | m->dstirq = mp_irq->dstirq; | |
2944e16b YL |
191 | } |
192 | ||
c2c21745 | 193 | static int __init mp_irq_mpc_intsrc_cmp(struct mpc_intsrc *mp_irq, |
540d4e72 | 194 | struct mpc_intsrc *m) |
2944e16b | 195 | { |
c2c21745 | 196 | if (mp_irq->dstapic != m->dstapic) |
2944e16b | 197 | return 1; |
c2c21745 | 198 | if (mp_irq->type != m->type) |
2944e16b | 199 | return 2; |
c2c21745 | 200 | if (mp_irq->irqtype != m->irqtype) |
2944e16b | 201 | return 3; |
c2c21745 | 202 | if (mp_irq->irqflag != m->irqflag) |
2944e16b | 203 | return 4; |
c2c21745 | 204 | if (mp_irq->srcbus != m->srcbus) |
2944e16b | 205 | return 5; |
c2c21745 | 206 | if (mp_irq->srcbusirq != m->srcbusirq) |
2944e16b | 207 | return 6; |
c2c21745 | 208 | if (mp_irq->dstirq != m->dstirq) |
2944e16b YL |
209 | return 7; |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
540d4e72 | 214 | static void __init MP_intsrc_info(struct mpc_intsrc *m) |
2944e16b YL |
215 | { |
216 | int i; | |
217 | ||
218 | print_MP_intsrc_info(m); | |
219 | ||
fcfa146e YL |
220 | for (i = 0; i < mp_irq_entries; i++) { |
221 | if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m)) | |
222 | return; | |
223 | } | |
2944e16b YL |
224 | |
225 | assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); | |
1da177e4 LT |
226 | if (++mp_irq_entries == MAX_IRQ_SOURCES) |
227 | panic("Max # of irq sources exceeded!!\n"); | |
228 | } | |
a6830278 JSR |
229 | #else /* CONFIG_X86_IO_APIC */ |
230 | static inline void __init MP_bus_info(struct mpc_bus *m) {} | |
231 | static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {} | |
232 | static inline void __init MP_intsrc_info(struct mpc_intsrc *m) {} | |
233 | #endif /* CONFIG_X86_IO_APIC */ | |
1da177e4 | 234 | |
61048c63 | 235 | |
8fb2952b | 236 | static void __init MP_lintsrc_info(struct mpc_lintsrc *m) |
1da177e4 | 237 | { |
eeb0d7d1 | 238 | apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x," |
1da177e4 | 239 | " IRQ %02x, APIC ID %x, APIC LINT %02x\n", |
b5ced7cd JSR |
240 | m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid, |
241 | m->srcbusirq, m->destapic, m->destapiclint); | |
1da177e4 LT |
242 | } |
243 | ||
1da177e4 LT |
244 | /* |
245 | * Read/parse the MPC | |
246 | */ | |
247 | ||
f29521e4 | 248 | static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str) |
1da177e4 | 249 | { |
1da177e4 | 250 | |
6c65da50 | 251 | if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) { |
e950bea8 | 252 | printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n", |
6c65da50 JSR |
253 | mpc->signature[0], mpc->signature[1], |
254 | mpc->signature[2], mpc->signature[3]); | |
1da177e4 LT |
255 | return 0; |
256 | } | |
6c65da50 | 257 | if (mpf_checksum((unsigned char *)mpc, mpc->length)) { |
e950bea8 | 258 | printk(KERN_ERR "MPTABLE: checksum error!\n"); |
1da177e4 LT |
259 | return 0; |
260 | } | |
6c65da50 | 261 | if (mpc->spec != 0x01 && mpc->spec != 0x04) { |
e950bea8 | 262 | printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n", |
6c65da50 | 263 | mpc->spec); |
1da177e4 LT |
264 | return 0; |
265 | } | |
6c65da50 | 266 | if (!mpc->lapic) { |
e950bea8 | 267 | printk(KERN_ERR "MPTABLE: null local APIC address!\n"); |
1da177e4 LT |
268 | return 0; |
269 | } | |
6c65da50 | 270 | memcpy(oem, mpc->oem, 8); |
4ef81297 | 271 | oem[8] = 0; |
11a62a05 | 272 | printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem); |
1da177e4 | 273 | |
6c65da50 | 274 | memcpy(str, mpc->productid, 12); |
4ef81297 | 275 | str[12] = 0; |
1da177e4 | 276 | |
11a62a05 | 277 | printk(KERN_INFO "MPTABLE: Product ID: %s\n", str); |
1da177e4 | 278 | |
6c65da50 | 279 | printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->lapic); |
1da177e4 | 280 | |
2944e16b YL |
281 | return 1; |
282 | } | |
283 | ||
a6830278 JSR |
284 | static void skip_entry(unsigned char **ptr, int *count, int size) |
285 | { | |
286 | *ptr += size; | |
287 | *count += size; | |
288 | } | |
289 | ||
5a5737ea JSR |
290 | static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt) |
291 | { | |
292 | printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n" | |
293 | "type %x\n", *mpt); | |
294 | print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16, | |
295 | 1, mpc, mpc->length, 1); | |
296 | } | |
297 | ||
72302142 TG |
298 | void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { } |
299 | ||
f29521e4 | 300 | static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early) |
2944e16b YL |
301 | { |
302 | char str[16]; | |
303 | char oem[10]; | |
304 | ||
305 | int count = sizeof(*mpc); | |
306 | unsigned char *mpt = ((unsigned char *)mpc) + count; | |
307 | ||
308 | if (!smp_check_mpc(mpc, oem, str)) | |
309 | return 0; | |
310 | ||
311 | #ifdef CONFIG_X86_32 | |
9c764247 | 312 | generic_mps_oem_check(mpc, oem, str); |
2944e16b | 313 | #endif |
e950bea8 | 314 | /* save the local APIC address, it might be non-default */ |
1da177e4 | 315 | if (!acpi_lapic) |
6c65da50 | 316 | mp_lapic_addr = mpc->lapic; |
1da177e4 | 317 | |
888032cd AS |
318 | if (early) |
319 | return 1; | |
320 | ||
72302142 TG |
321 | if (mpc->oemptr) |
322 | x86_init.mpparse.smp_read_mpc_oem(mpc); | |
64898a8b | 323 | |
1da177e4 | 324 | /* |
4ef81297 | 325 | * Now process the configuration blocks. |
1da177e4 | 326 | */ |
f4848472 | 327 | x86_init.mpparse.mpc_record(0); |
64898a8b | 328 | |
6c65da50 | 329 | while (count < mpc->length) { |
4ef81297 AS |
330 | switch (*mpt) { |
331 | case MP_PROCESSOR: | |
a6830278 JSR |
332 | /* ACPI may have already provided this data */ |
333 | if (!acpi_lapic) | |
c58603e8 | 334 | MP_processor_info((struct mpc_cpu *)mpt); |
a6830278 JSR |
335 | skip_entry(&mpt, &count, sizeof(struct mpc_cpu)); |
336 | break; | |
4ef81297 | 337 | case MP_BUS: |
c58603e8 | 338 | MP_bus_info((struct mpc_bus *)mpt); |
a6830278 JSR |
339 | skip_entry(&mpt, &count, sizeof(struct mpc_bus)); |
340 | break; | |
4ef81297 | 341 | case MP_IOAPIC: |
c58603e8 | 342 | MP_ioapic_info((struct mpc_ioapic *)mpt); |
a6830278 JSR |
343 | skip_entry(&mpt, &count, sizeof(struct mpc_ioapic)); |
344 | break; | |
4ef81297 | 345 | case MP_INTSRC: |
c58603e8 | 346 | MP_intsrc_info((struct mpc_intsrc *)mpt); |
a6830278 JSR |
347 | skip_entry(&mpt, &count, sizeof(struct mpc_intsrc)); |
348 | break; | |
4ef81297 | 349 | case MP_LINTSRC: |
c58603e8 | 350 | MP_lintsrc_info((struct mpc_lintsrc *)mpt); |
a6830278 JSR |
351 | skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc)); |
352 | break; | |
4ef81297 | 353 | default: |
711554db | 354 | /* wrong mptable */ |
5a5737ea | 355 | smp_dump_mptable(mpc, mpt); |
6c65da50 | 356 | count = mpc->length; |
711554db | 357 | break; |
1da177e4 | 358 | } |
f4848472 | 359 | x86_init.mpparse.mpc_record(1); |
1da177e4 | 360 | } |
e0da3364 | 361 | |
26f7ef14 YL |
362 | #ifdef CONFIG_X86_BIGSMP |
363 | generic_bigsmp_probe(); | |
e0da3364 YL |
364 | #endif |
365 | ||
72ce0165 IM |
366 | if (apic->setup_apic_routing) |
367 | apic->setup_apic_routing(); | |
368 | ||
1da177e4 | 369 | if (!num_processors) |
e950bea8 | 370 | printk(KERN_ERR "MPTABLE: no processors registered!\n"); |
1da177e4 LT |
371 | return num_processors; |
372 | } | |
373 | ||
61048c63 AS |
374 | #ifdef CONFIG_X86_IO_APIC |
375 | ||
1da177e4 LT |
376 | static int __init ELCR_trigger(unsigned int irq) |
377 | { | |
378 | unsigned int port; | |
379 | ||
380 | port = 0x4d0 + (irq >> 3); | |
381 | return (inb(port) >> (irq & 7)) & 1; | |
382 | } | |
383 | ||
384 | static void __init construct_default_ioirq_mptable(int mpc_default_type) | |
385 | { | |
540d4e72 | 386 | struct mpc_intsrc intsrc; |
1da177e4 LT |
387 | int i; |
388 | int ELCR_fallback = 0; | |
389 | ||
e253b396 JSR |
390 | intsrc.type = MP_INTSRC; |
391 | intsrc.irqflag = 0; /* conforming */ | |
392 | intsrc.srcbus = 0; | |
b5ba7e6d | 393 | intsrc.dstapic = mp_ioapics[0].apicid; |
1da177e4 | 394 | |
e253b396 | 395 | intsrc.irqtype = mp_INT; |
1da177e4 LT |
396 | |
397 | /* | |
398 | * If true, we have an ISA/PCI system with no IRQ entries | |
399 | * in the MP table. To prevent the PCI interrupts from being set up | |
400 | * incorrectly, we try to use the ELCR. The sanity check to see if | |
401 | * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can | |
402 | * never be level sensitive, so we simply see if the ELCR agrees. | |
403 | * If it does, we assume it's valid. | |
404 | */ | |
405 | if (mpc_default_type == 5) { | |
62441bf1 AS |
406 | printk(KERN_INFO "ISA/PCI bus type with no IRQ information... " |
407 | "falling back to ELCR\n"); | |
1da177e4 | 408 | |
62441bf1 AS |
409 | if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) || |
410 | ELCR_trigger(13)) | |
411 | printk(KERN_ERR "ELCR contains invalid data... " | |
412 | "not using ELCR\n"); | |
1da177e4 | 413 | else { |
4ef81297 AS |
414 | printk(KERN_INFO |
415 | "Using ELCR to identify PCI interrupts\n"); | |
1da177e4 LT |
416 | ELCR_fallback = 1; |
417 | } | |
418 | } | |
419 | ||
420 | for (i = 0; i < 16; i++) { | |
421 | switch (mpc_default_type) { | |
422 | case 2: | |
423 | if (i == 0 || i == 13) | |
424 | continue; /* IRQ0 & IRQ13 not connected */ | |
425 | /* fall through */ | |
426 | default: | |
427 | if (i == 2) | |
428 | continue; /* IRQ2 is never connected */ | |
429 | } | |
430 | ||
431 | if (ELCR_fallback) { | |
432 | /* | |
433 | * If the ELCR indicates a level-sensitive interrupt, we | |
434 | * copy that information over to the MP table in the | |
435 | * irqflag field (level sensitive, active high polarity). | |
436 | */ | |
437 | if (ELCR_trigger(i)) | |
e253b396 | 438 | intsrc.irqflag = 13; |
1da177e4 | 439 | else |
e253b396 | 440 | intsrc.irqflag = 0; |
1da177e4 LT |
441 | } |
442 | ||
e253b396 JSR |
443 | intsrc.srcbusirq = i; |
444 | intsrc.dstirq = i ? i : 2; /* IRQ0 to INTIN2 */ | |
1da177e4 LT |
445 | MP_intsrc_info(&intsrc); |
446 | } | |
447 | ||
e253b396 JSR |
448 | intsrc.irqtype = mp_ExtINT; |
449 | intsrc.srcbusirq = 0; | |
450 | intsrc.dstirq = 0; /* 8259A to INTIN0 */ | |
1da177e4 LT |
451 | MP_intsrc_info(&intsrc); |
452 | } | |
453 | ||
61048c63 | 454 | |
39e00fe2 | 455 | static void __init construct_ioapic_table(int mpc_default_type) |
1da177e4 | 456 | { |
2b85b5fb | 457 | struct mpc_ioapic ioapic; |
00fb8606 | 458 | struct mpc_bus bus; |
1da177e4 | 459 | |
d4c715fa JSR |
460 | bus.type = MP_BUS; |
461 | bus.busid = 0; | |
1da177e4 | 462 | switch (mpc_default_type) { |
4ef81297 | 463 | default: |
62441bf1 | 464 | printk(KERN_ERR "???\nUnknown standard configuration %d\n", |
4ef81297 AS |
465 | mpc_default_type); |
466 | /* fall through */ | |
467 | case 1: | |
468 | case 5: | |
d4c715fa | 469 | memcpy(bus.bustype, "ISA ", 6); |
4ef81297 AS |
470 | break; |
471 | case 2: | |
472 | case 6: | |
473 | case 3: | |
d4c715fa | 474 | memcpy(bus.bustype, "EISA ", 6); |
4ef81297 AS |
475 | break; |
476 | case 4: | |
477 | case 7: | |
d4c715fa | 478 | memcpy(bus.bustype, "MCA ", 6); |
1da177e4 LT |
479 | } |
480 | MP_bus_info(&bus); | |
481 | if (mpc_default_type > 4) { | |
d4c715fa JSR |
482 | bus.busid = 1; |
483 | memcpy(bus.bustype, "PCI ", 6); | |
1da177e4 LT |
484 | MP_bus_info(&bus); |
485 | } | |
486 | ||
8f3e1df4 CG |
487 | ioapic.type = MP_IOAPIC; |
488 | ioapic.apicid = 2; | |
489 | ioapic.apicver = mpc_default_type > 4 ? 0x10 : 0x01; | |
490 | ioapic.flags = MPC_APIC_USABLE; | |
491 | ioapic.apicaddr = IO_APIC_DEFAULT_PHYS_BASE; | |
1da177e4 LT |
492 | MP_ioapic_info(&ioapic); |
493 | ||
494 | /* | |
495 | * We set up most of the low 16 IO-APIC pins according to MPS rules. | |
496 | */ | |
497 | construct_default_ioirq_mptable(mpc_default_type); | |
85cc35fa TG |
498 | } |
499 | #else | |
39e00fe2 | 500 | static inline void __init construct_ioapic_table(int mpc_default_type) { } |
61048c63 | 501 | #endif |
85cc35fa TG |
502 | |
503 | static inline void __init construct_default_ISA_mptable(int mpc_default_type) | |
504 | { | |
f4f21b71 | 505 | struct mpc_cpu processor; |
8fb2952b | 506 | struct mpc_lintsrc lintsrc; |
85cc35fa TG |
507 | int linttypes[2] = { mp_ExtINT, mp_NMI }; |
508 | int i; | |
509 | ||
510 | /* | |
511 | * local APIC has default address | |
512 | */ | |
513 | mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; | |
514 | ||
515 | /* | |
516 | * 2 CPUs, numbered 0 & 1. | |
517 | */ | |
c4563826 | 518 | processor.type = MP_PROCESSOR; |
85cc35fa | 519 | /* Either an integrated APIC or a discrete 82489DX. */ |
c4563826 JSR |
520 | processor.apicver = mpc_default_type > 4 ? 0x10 : 0x01; |
521 | processor.cpuflag = CPU_ENABLED; | |
522 | processor.cpufeature = (boot_cpu_data.x86 << 8) | | |
85cc35fa | 523 | (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask; |
c4563826 JSR |
524 | processor.featureflag = boot_cpu_data.x86_capability[0]; |
525 | processor.reserved[0] = 0; | |
526 | processor.reserved[1] = 0; | |
85cc35fa | 527 | for (i = 0; i < 2; i++) { |
c4563826 | 528 | processor.apicid = i; |
85cc35fa TG |
529 | MP_processor_info(&processor); |
530 | } | |
531 | ||
532 | construct_ioapic_table(mpc_default_type); | |
533 | ||
b5ced7cd JSR |
534 | lintsrc.type = MP_LINTSRC; |
535 | lintsrc.irqflag = 0; /* conforming */ | |
536 | lintsrc.srcbusid = 0; | |
537 | lintsrc.srcbusirq = 0; | |
538 | lintsrc.destapic = MP_APIC_ALL; | |
1da177e4 | 539 | for (i = 0; i < 2; i++) { |
b5ced7cd JSR |
540 | lintsrc.irqtype = linttypes[i]; |
541 | lintsrc.destapiclint = i; | |
1da177e4 LT |
542 | MP_lintsrc_info(&lintsrc); |
543 | } | |
544 | } | |
545 | ||
41401db6 | 546 | static struct mpf_intel *mpf_found; |
1da177e4 | 547 | |
8d4dd919 YL |
548 | static unsigned long __init get_mpc_size(unsigned long physptr) |
549 | { | |
550 | struct mpc_table *mpc; | |
551 | unsigned long size; | |
552 | ||
553 | mpc = early_ioremap(physptr, PAGE_SIZE); | |
554 | size = mpc->length; | |
555 | early_iounmap(mpc, PAGE_SIZE); | |
556 | apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size); | |
557 | ||
558 | return size; | |
559 | } | |
560 | ||
0b3ba0c3 JSR |
561 | static int __init check_physptr(struct mpf_intel *mpf, unsigned int early) |
562 | { | |
563 | struct mpc_table *mpc; | |
564 | unsigned long size; | |
565 | ||
566 | size = get_mpc_size(mpf->physptr); | |
567 | mpc = early_ioremap(mpf->physptr, size); | |
568 | /* | |
569 | * Read the physical hardware table. Anything here will | |
570 | * override the defaults. | |
571 | */ | |
572 | if (!smp_read_mpc(mpc, early)) { | |
573 | #ifdef CONFIG_X86_LOCAL_APIC | |
574 | smp_found_config = 0; | |
575 | #endif | |
576 | printk(KERN_ERR "BIOS bug, MP table errors detected!...\n" | |
577 | "... disabling SMP support. (tell your hw vendor)\n"); | |
578 | early_iounmap(mpc, size); | |
579 | return -1; | |
580 | } | |
581 | early_iounmap(mpc, size); | |
582 | ||
583 | if (early) | |
584 | return -1; | |
585 | ||
586 | #ifdef CONFIG_X86_IO_APIC | |
587 | /* | |
588 | * If there are no explicit MP IRQ entries, then we are | |
589 | * broken. We set up most of the low 16 IO-APIC pins to | |
590 | * ISA defaults and hope it will work. | |
591 | */ | |
592 | if (!mp_irq_entries) { | |
593 | struct mpc_bus bus; | |
594 | ||
595 | printk(KERN_ERR "BIOS bug, no explicit IRQ entries, " | |
596 | "using default mptable. (tell your hw vendor)\n"); | |
597 | ||
598 | bus.type = MP_BUS; | |
599 | bus.busid = 0; | |
600 | memcpy(bus.bustype, "ISA ", 6); | |
601 | MP_bus_info(&bus); | |
602 | ||
603 | construct_default_ioirq_mptable(0); | |
604 | } | |
605 | #endif | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
1da177e4 LT |
610 | /* |
611 | * Scan the memory blocks for an SMP configuration block. | |
612 | */ | |
b3f1b617 | 613 | void __init default_get_smp_config(unsigned int early) |
1da177e4 | 614 | { |
41401db6 | 615 | struct mpf_intel *mpf = mpf_found; |
1da177e4 | 616 | |
69b88afa YL |
617 | if (!mpf) |
618 | return; | |
619 | ||
888032cd AS |
620 | if (acpi_lapic && early) |
621 | return; | |
69b88afa | 622 | |
1da177e4 | 623 | /* |
69b88afa YL |
624 | * MPS doesn't support hyperthreading, aka only have |
625 | * thread 0 apic id in MPS table | |
1da177e4 | 626 | */ |
69b88afa | 627 | if (acpi_lapic && acpi_ioapic) |
1da177e4 | 628 | return; |
1da177e4 | 629 | |
4ef81297 | 630 | printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n", |
1eb1b3b6 | 631 | mpf->specification); |
b3e24164 | 632 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32) |
1eb1b3b6 | 633 | if (mpf->feature2 & (1 << 7)) { |
1da177e4 LT |
634 | printk(KERN_INFO " IMCR and PIC compatibility mode.\n"); |
635 | pic_mode = 1; | |
636 | } else { | |
637 | printk(KERN_INFO " Virtual Wire compatibility mode.\n"); | |
638 | pic_mode = 0; | |
639 | } | |
4421b1c8 | 640 | #endif |
1da177e4 LT |
641 | /* |
642 | * Now see if we need to read further. | |
643 | */ | |
1eb1b3b6 | 644 | if (mpf->feature1 != 0) { |
888032cd AS |
645 | if (early) { |
646 | /* | |
647 | * local APIC has default address | |
648 | */ | |
649 | mp_lapic_addr = APIC_DEFAULT_PHYS_BASE; | |
650 | return; | |
651 | } | |
1da177e4 | 652 | |
4ef81297 | 653 | printk(KERN_INFO "Default MP configuration #%d\n", |
1eb1b3b6 JSR |
654 | mpf->feature1); |
655 | construct_default_ISA_mptable(mpf->feature1); | |
1da177e4 | 656 | |
1eb1b3b6 | 657 | } else if (mpf->physptr) { |
0b3ba0c3 | 658 | if (check_physptr(mpf, early)) |
1da177e4 | 659 | return; |
1da177e4 LT |
660 | } else |
661 | BUG(); | |
662 | ||
888032cd AS |
663 | if (!early) |
664 | printk(KERN_INFO "Processors: %d\n", num_processors); | |
1da177e4 LT |
665 | /* |
666 | * Only use the first configuration found. | |
667 | */ | |
668 | } | |
669 | ||
57592224 | 670 | static void __init smp_reserve_bootmem(struct mpf_intel *mpf) |
a6830278 JSR |
671 | { |
672 | unsigned long size = get_mpc_size(mpf->physptr); | |
673 | #ifdef CONFIG_X86_32 | |
674 | /* | |
675 | * We cannot access to MPC table to compute table size yet, | |
676 | * as only few megabytes from the bottom is mapped now. | |
677 | * PC-9800's MPC table places on the very last of physical | |
678 | * memory; so that simply reserving PAGE_SIZE from mpf->physptr | |
679 | * yields BUG() in reserve_bootmem. | |
680 | * also need to make sure physptr is below than max_low_pfn | |
681 | * we don't need reserve the area above max_low_pfn | |
682 | */ | |
683 | unsigned long end = max_low_pfn * PAGE_SIZE; | |
684 | ||
685 | if (mpf->physptr < end) { | |
686 | if (mpf->physptr + size > end) | |
687 | size = end - mpf->physptr; | |
688 | reserve_bootmem_generic(mpf->physptr, size, BOOTMEM_DEFAULT); | |
689 | } | |
690 | #else | |
691 | reserve_bootmem_generic(mpf->physptr, size, BOOTMEM_DEFAULT); | |
692 | #endif | |
693 | } | |
694 | ||
888032cd AS |
695 | static int __init smp_scan_config(unsigned long base, unsigned long length, |
696 | unsigned reserve) | |
1da177e4 | 697 | { |
92fd4b7a | 698 | unsigned int *bp = phys_to_virt(base); |
41401db6 | 699 | struct mpf_intel *mpf; |
1da177e4 | 700 | |
eeb0d7d1 RH |
701 | apic_printk(APIC_VERBOSE, "Scan SMP from %p for %ld bytes.\n", |
702 | bp, length); | |
5d47a271 | 703 | BUILD_BUG_ON(sizeof(*mpf) != 16); |
1da177e4 LT |
704 | |
705 | while (length > 0) { | |
41401db6 | 706 | mpf = (struct mpf_intel *)bp; |
1da177e4 | 707 | if ((*bp == SMP_MAGIC_IDENT) && |
1eb1b3b6 | 708 | (mpf->length == 1) && |
4ef81297 | 709 | !mpf_checksum((unsigned char *)bp, 16) && |
1eb1b3b6 JSR |
710 | ((mpf->specification == 1) |
711 | || (mpf->specification == 4))) { | |
bab4b27c | 712 | #ifdef CONFIG_X86_LOCAL_APIC |
1da177e4 | 713 | smp_found_config = 1; |
bab4b27c | 714 | #endif |
92fd4b7a | 715 | mpf_found = mpf; |
b1f006b6 | 716 | |
ba1511bf JSR |
717 | printk(KERN_INFO "found SMP MP-table at [%p] %llx\n", |
718 | mpf, (u64)virt_to_phys(mpf)); | |
b1f006b6 YL |
719 | |
720 | if (!reserve) | |
721 | return 1; | |
f6243239 | 722 | reserve_bootmem_generic(virt_to_phys(mpf), sizeof(*mpf), |
72a7fe39 | 723 | BOOTMEM_DEFAULT); |
a6830278 JSR |
724 | if (mpf->physptr) |
725 | smp_reserve_bootmem(mpf); | |
1da177e4 | 726 | |
d2dbf343 | 727 | return 1; |
1da177e4 LT |
728 | } |
729 | bp += 4; | |
730 | length -= 16; | |
731 | } | |
732 | return 0; | |
733 | } | |
734 | ||
b3f1b617 | 735 | void __init default_find_smp_config(unsigned int reserve) |
1da177e4 LT |
736 | { |
737 | unsigned int address; | |
738 | ||
739 | /* | |
740 | * FIXME: Linux assumes you have 640K of base ram.. | |
741 | * this continues the error... | |
742 | * | |
743 | * 1) Scan the bottom 1K for a signature | |
744 | * 2) Scan the top 1K of base RAM | |
745 | * 3) Scan the 64K of bios | |
746 | */ | |
888032cd AS |
747 | if (smp_scan_config(0x0, 0x400, reserve) || |
748 | smp_scan_config(639 * 0x400, 0x400, reserve) || | |
749 | smp_scan_config(0xF0000, 0x10000, reserve)) | |
1da177e4 LT |
750 | return; |
751 | /* | |
752 | * If it is an SMP machine we should know now, unless the | |
753 | * configuration is in an EISA/MCA bus machine with an | |
754 | * extended bios data area. | |
755 | * | |
756 | * there is a real-mode segmented pointer pointing to the | |
757 | * 4K EBDA area at 0x40E, calculate and scan it here. | |
758 | * | |
759 | * NOTE! There are Linux loaders that will corrupt the EBDA | |
760 | * area, and as such this kind of SMP config may be less | |
761 | * trustworthy, simply because the SMP table may have been | |
762 | * stomped on during early boot. These loaders are buggy and | |
763 | * should be fixed. | |
764 | * | |
765 | * MP1.4 SPEC states to only scan first 1K of 4K EBDA. | |
766 | */ | |
767 | ||
768 | address = get_bios_ebda(); | |
769 | if (address) | |
888032cd AS |
770 | smp_scan_config(address, 0x400, reserve); |
771 | } | |
772 | ||
2944e16b YL |
773 | #ifdef CONFIG_X86_IO_APIC |
774 | static u8 __initdata irq_used[MAX_IRQ_SOURCES]; | |
775 | ||
540d4e72 | 776 | static int __init get_MP_intsrc_index(struct mpc_intsrc *m) |
2944e16b YL |
777 | { |
778 | int i; | |
779 | ||
e253b396 | 780 | if (m->irqtype != mp_INT) |
2944e16b YL |
781 | return 0; |
782 | ||
e253b396 | 783 | if (m->irqflag != 0x0f) |
2944e16b YL |
784 | return 0; |
785 | ||
786 | /* not legacy */ | |
787 | ||
788 | for (i = 0; i < mp_irq_entries; i++) { | |
c2c21745 | 789 | if (mp_irqs[i].irqtype != mp_INT) |
2944e16b YL |
790 | continue; |
791 | ||
c2c21745 | 792 | if (mp_irqs[i].irqflag != 0x0f) |
2944e16b YL |
793 | continue; |
794 | ||
c2c21745 | 795 | if (mp_irqs[i].srcbus != m->srcbus) |
2944e16b | 796 | continue; |
c2c21745 | 797 | if (mp_irqs[i].srcbusirq != m->srcbusirq) |
2944e16b YL |
798 | continue; |
799 | if (irq_used[i]) { | |
800 | /* already claimed */ | |
801 | return -2; | |
802 | } | |
803 | irq_used[i] = 1; | |
804 | return i; | |
805 | } | |
806 | ||
807 | /* not found */ | |
808 | return -1; | |
809 | } | |
810 | ||
811 | #define SPARE_SLOT_NUM 20 | |
812 | ||
540d4e72 | 813 | static struct mpc_intsrc __initdata *m_spare[SPARE_SLOT_NUM]; |
a6830278 | 814 | |
57592224 | 815 | static void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) |
a6830278 JSR |
816 | { |
817 | int i; | |
818 | ||
819 | apic_printk(APIC_VERBOSE, "OLD "); | |
820 | print_MP_intsrc_info(m); | |
821 | ||
822 | i = get_MP_intsrc_index(m); | |
823 | if (i > 0) { | |
824 | assign_to_mpc_intsrc(&mp_irqs[i], m); | |
825 | apic_printk(APIC_VERBOSE, "NEW "); | |
826 | print_mp_irq_info(&mp_irqs[i]); | |
827 | return; | |
828 | } | |
829 | if (!i) { | |
830 | /* legacy, do nothing */ | |
831 | return; | |
832 | } | |
833 | if (*nr_m_spare < SPARE_SLOT_NUM) { | |
834 | /* | |
835 | * not found (-1), or duplicated (-2) are invalid entries, | |
836 | * we need to use the slot later | |
837 | */ | |
838 | m_spare[*nr_m_spare] = m; | |
839 | *nr_m_spare += 1; | |
840 | } | |
841 | } | |
842 | #else /* CONFIG_X86_IO_APIC */ | |
57592224 RM |
843 | static |
844 | inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {} | |
a6830278 JSR |
845 | #endif /* CONFIG_X86_IO_APIC */ |
846 | ||
ee214558 YL |
847 | static int |
848 | check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count) | |
a6830278 | 849 | { |
ee214558 YL |
850 | int ret = 0; |
851 | ||
852 | if (!mpc_new_phys || count <= mpc_new_length) { | |
853 | WARN(1, "update_mptable: No spare slots (length: %x)\n", count); | |
854 | return -1; | |
a6830278 JSR |
855 | } |
856 | ||
ee214558 | 857 | return ret; |
a6830278 | 858 | } |
2944e16b | 859 | |
f29521e4 | 860 | static int __init replace_intsrc_all(struct mpc_table *mpc, |
2944e16b YL |
861 | unsigned long mpc_new_phys, |
862 | unsigned long mpc_new_length) | |
863 | { | |
864 | #ifdef CONFIG_X86_IO_APIC | |
865 | int i; | |
2944e16b | 866 | #endif |
2944e16b | 867 | int count = sizeof(*mpc); |
a6830278 | 868 | int nr_m_spare = 0; |
2944e16b YL |
869 | unsigned char *mpt = ((unsigned char *)mpc) + count; |
870 | ||
6c65da50 JSR |
871 | printk(KERN_INFO "mpc_length %x\n", mpc->length); |
872 | while (count < mpc->length) { | |
2944e16b YL |
873 | switch (*mpt) { |
874 | case MP_PROCESSOR: | |
a6830278 JSR |
875 | skip_entry(&mpt, &count, sizeof(struct mpc_cpu)); |
876 | break; | |
2944e16b | 877 | case MP_BUS: |
a6830278 JSR |
878 | skip_entry(&mpt, &count, sizeof(struct mpc_bus)); |
879 | break; | |
2944e16b | 880 | case MP_IOAPIC: |
a6830278 JSR |
881 | skip_entry(&mpt, &count, sizeof(struct mpc_ioapic)); |
882 | break; | |
2944e16b | 883 | case MP_INTSRC: |
c58603e8 | 884 | check_irq_src((struct mpc_intsrc *)mpt, &nr_m_spare); |
a6830278 JSR |
885 | skip_entry(&mpt, &count, sizeof(struct mpc_intsrc)); |
886 | break; | |
2944e16b | 887 | case MP_LINTSRC: |
a6830278 JSR |
888 | skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc)); |
889 | break; | |
2944e16b YL |
890 | default: |
891 | /* wrong mptable */ | |
5a5737ea | 892 | smp_dump_mptable(mpc, mpt); |
2944e16b YL |
893 | goto out; |
894 | } | |
895 | } | |
896 | ||
897 | #ifdef CONFIG_X86_IO_APIC | |
898 | for (i = 0; i < mp_irq_entries; i++) { | |
899 | if (irq_used[i]) | |
900 | continue; | |
901 | ||
c2c21745 | 902 | if (mp_irqs[i].irqtype != mp_INT) |
2944e16b YL |
903 | continue; |
904 | ||
c2c21745 | 905 | if (mp_irqs[i].irqflag != 0x0f) |
2944e16b YL |
906 | continue; |
907 | ||
908 | if (nr_m_spare > 0) { | |
82034d6f | 909 | apic_printk(APIC_VERBOSE, "*NEW* found\n"); |
2944e16b YL |
910 | nr_m_spare--; |
911 | assign_to_mpc_intsrc(&mp_irqs[i], m_spare[nr_m_spare]); | |
912 | m_spare[nr_m_spare] = NULL; | |
913 | } else { | |
540d4e72 JSR |
914 | struct mpc_intsrc *m = (struct mpc_intsrc *)mpt; |
915 | count += sizeof(struct mpc_intsrc); | |
ee214558 | 916 | if (check_slot(mpc_new_phys, mpc_new_length, count) < 0) |
a6830278 | 917 | goto out; |
2944e16b | 918 | assign_to_mpc_intsrc(&mp_irqs[i], m); |
6c65da50 | 919 | mpc->length = count; |
540d4e72 | 920 | mpt += sizeof(struct mpc_intsrc); |
2944e16b YL |
921 | } |
922 | print_mp_irq_info(&mp_irqs[i]); | |
923 | } | |
924 | #endif | |
925 | out: | |
926 | /* update checksum */ | |
6c65da50 JSR |
927 | mpc->checksum = 0; |
928 | mpc->checksum -= mpf_checksum((unsigned char *)mpc, mpc->length); | |
2944e16b YL |
929 | |
930 | return 0; | |
931 | } | |
932 | ||
f1bdb523 | 933 | int enable_update_mptable; |
fcfa146e | 934 | |
2944e16b YL |
935 | static int __init update_mptable_setup(char *str) |
936 | { | |
937 | enable_update_mptable = 1; | |
629e15d2 YL |
938 | #ifdef CONFIG_PCI |
939 | pci_routeirq = 1; | |
940 | #endif | |
2944e16b YL |
941 | return 0; |
942 | } | |
943 | early_param("update_mptable", update_mptable_setup); | |
944 | ||
945 | static unsigned long __initdata mpc_new_phys; | |
946 | static unsigned long mpc_new_length __initdata = 4096; | |
947 | ||
948 | /* alloc_mptable or alloc_mptable=4k */ | |
949 | static int __initdata alloc_mptable; | |
950 | static int __init parse_alloc_mptable_opt(char *p) | |
951 | { | |
952 | enable_update_mptable = 1; | |
629e15d2 YL |
953 | #ifdef CONFIG_PCI |
954 | pci_routeirq = 1; | |
955 | #endif | |
2944e16b YL |
956 | alloc_mptable = 1; |
957 | if (!p) | |
958 | return 0; | |
959 | mpc_new_length = memparse(p, &p); | |
960 | return 0; | |
961 | } | |
962 | early_param("alloc_mptable", parse_alloc_mptable_opt); | |
963 | ||
964 | void __init early_reserve_e820_mpc_new(void) | |
965 | { | |
966 | if (enable_update_mptable && alloc_mptable) { | |
967 | u64 startt = 0; | |
968 | #ifdef CONFIG_X86_TRAMPOLINE | |
969 | startt = TRAMPOLINE_BASE; | |
970 | #endif | |
971 | mpc_new_phys = early_reserve_e820(startt, mpc_new_length, 4); | |
972 | } | |
973 | } | |
974 | ||
975 | static int __init update_mp_table(void) | |
976 | { | |
977 | char str[16]; | |
978 | char oem[10]; | |
41401db6 | 979 | struct mpf_intel *mpf; |
f29521e4 | 980 | struct mpc_table *mpc, *mpc_new; |
2944e16b YL |
981 | |
982 | if (!enable_update_mptable) | |
983 | return 0; | |
984 | ||
985 | mpf = mpf_found; | |
986 | if (!mpf) | |
987 | return 0; | |
988 | ||
989 | /* | |
990 | * Now see if we need to go further. | |
991 | */ | |
1eb1b3b6 | 992 | if (mpf->feature1 != 0) |
2944e16b YL |
993 | return 0; |
994 | ||
1eb1b3b6 | 995 | if (!mpf->physptr) |
2944e16b YL |
996 | return 0; |
997 | ||
1eb1b3b6 | 998 | mpc = phys_to_virt(mpf->physptr); |
2944e16b YL |
999 | |
1000 | if (!smp_check_mpc(mpc, oem, str)) | |
1001 | return 0; | |
1002 | ||
ba1511bf | 1003 | printk(KERN_INFO "mpf: %llx\n", (u64)virt_to_phys(mpf)); |
1eb1b3b6 | 1004 | printk(KERN_INFO "physptr: %x\n", mpf->physptr); |
2944e16b | 1005 | |
6c65da50 | 1006 | if (mpc_new_phys && mpc->length > mpc_new_length) { |
2944e16b YL |
1007 | mpc_new_phys = 0; |
1008 | printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n", | |
1009 | mpc_new_length); | |
1010 | } | |
1011 | ||
1012 | if (!mpc_new_phys) { | |
1013 | unsigned char old, new; | |
1014 | /* check if we can change the postion */ | |
6c65da50 JSR |
1015 | mpc->checksum = 0; |
1016 | old = mpf_checksum((unsigned char *)mpc, mpc->length); | |
1017 | mpc->checksum = 0xff; | |
1018 | new = mpf_checksum((unsigned char *)mpc, mpc->length); | |
2944e16b YL |
1019 | if (old == new) { |
1020 | printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n"); | |
1021 | return 0; | |
1022 | } | |
1023 | printk(KERN_INFO "use in-positon replacing\n"); | |
1024 | } else { | |
1eb1b3b6 | 1025 | mpf->physptr = mpc_new_phys; |
2944e16b | 1026 | mpc_new = phys_to_virt(mpc_new_phys); |
6c65da50 | 1027 | memcpy(mpc_new, mpc, mpc->length); |
2944e16b YL |
1028 | mpc = mpc_new; |
1029 | /* check if we can modify that */ | |
1eb1b3b6 | 1030 | if (mpc_new_phys - mpf->physptr) { |
41401db6 | 1031 | struct mpf_intel *mpf_new; |
2944e16b YL |
1032 | /* steal 16 bytes from [0, 1k) */ |
1033 | printk(KERN_INFO "mpf new: %x\n", 0x400 - 16); | |
1034 | mpf_new = phys_to_virt(0x400 - 16); | |
1035 | memcpy(mpf_new, mpf, 16); | |
1036 | mpf = mpf_new; | |
1eb1b3b6 | 1037 | mpf->physptr = mpc_new_phys; |
2944e16b | 1038 | } |
1eb1b3b6 JSR |
1039 | mpf->checksum = 0; |
1040 | mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16); | |
1041 | printk(KERN_INFO "physptr new: %x\n", mpf->physptr); | |
2944e16b YL |
1042 | } |
1043 | ||
1044 | /* | |
1045 | * only replace the one with mp_INT and | |
1046 | * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW, | |
1047 | * already in mp_irqs , stored by ... and mp_config_acpi_gsi, | |
1048 | * may need pci=routeirq for all coverage | |
1049 | */ | |
1050 | replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length); | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | late_initcall(update_mp_table); |