Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_tables.c - ACPI Boot-Time Table Parsing | |
3 | * | |
4 | * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
1da177e4 LT |
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
19 | * | |
20 | */ | |
21 | ||
07f438df HG |
22 | /* Uncomment next line to get verbose printout */ |
23 | /* #define DEBUG */ | |
730bf5eb HG |
24 | #define pr_fmt(fmt) "ACPI: " fmt |
25 | ||
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/kernel.h> | |
1da177e4 LT |
28 | #include <linux/smp.h> |
29 | #include <linux/string.h> | |
30 | #include <linux/types.h> | |
31 | #include <linux/irq.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/acpi.h> | |
34 | #include <linux/bootmem.h> | |
35 | ||
04348e69 | 36 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 37 | |
1da177e4 LT |
38 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
39 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
40 | ||
ad71860a | 41 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 42 | |
4e381a4f | 43 | static int acpi_apic_instance __initdata; |
a1fdcc0d | 44 | |
4fc0a7e8 LZ |
45 | /* |
46 | * Disable table checksum verification for the early stage due to the size | |
47 | * limitation of the current x86 early mapping implementation. | |
48 | */ | |
49 | static bool acpi_verify_table_checksum __initdata = false; | |
50 | ||
a1fdcc0d | 51 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
52 | { |
53 | if (!header) | |
54 | return; | |
55 | ||
56 | switch (header->type) { | |
57 | ||
5f3b1a8b | 58 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 59 | { |
5f3b1a8b AS |
60 | struct acpi_madt_local_apic *p = |
61 | (struct acpi_madt_local_apic *)header; | |
07f438df HG |
62 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
63 | p->processor_id, p->id, | |
64 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 65 | } |
1da177e4 LT |
66 | break; |
67 | ||
7237d3de SS |
68 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
69 | { | |
70 | struct acpi_madt_local_x2apic *p = | |
71 | (struct acpi_madt_local_x2apic *)header; | |
07f438df HG |
72 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
73 | p->local_apic_id, p->uid, | |
74 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
75 | } |
76 | break; | |
77 | ||
5f3b1a8b | 78 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 79 | { |
5f3b1a8b AS |
80 | struct acpi_madt_io_apic *p = |
81 | (struct acpi_madt_io_apic *)header; | |
07f438df HG |
82 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
83 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 84 | } |
1da177e4 LT |
85 | break; |
86 | ||
5f3b1a8b | 87 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 88 | { |
5f3b1a8b AS |
89 | struct acpi_madt_interrupt_override *p = |
90 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
91 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
92 | p->bus, p->source_irq, p->global_irq, | |
93 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
94 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
95 | if (p->inti_flags & |
96 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
97 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
98 | p->inti_flags & | |
5f3b1a8b | 99 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 100 | } |
1da177e4 LT |
101 | break; |
102 | ||
5f3b1a8b | 103 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 104 | { |
5f3b1a8b AS |
105 | struct acpi_madt_nmi_source *p = |
106 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
107 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
108 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
109 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
110 | p->global_irq); | |
4be44fcd | 111 | } |
1da177e4 LT |
112 | break; |
113 | ||
5f3b1a8b | 114 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 115 | { |
5f3b1a8b AS |
116 | struct acpi_madt_local_apic_nmi *p = |
117 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
118 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
119 | p->processor_id, | |
120 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
121 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
122 | p->lint); | |
7237d3de SS |
123 | } |
124 | break; | |
125 | ||
126 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
127 | { | |
128 | u16 polarity, trigger; | |
129 | struct acpi_madt_local_x2apic_nmi *p = | |
130 | (struct acpi_madt_local_x2apic_nmi *)header; | |
131 | ||
132 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
133 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
134 | ||
730bf5eb HG |
135 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
136 | p->uid, | |
137 | mps_inti_flags_polarity[polarity], | |
138 | mps_inti_flags_trigger[trigger], | |
139 | p->lint); | |
4be44fcd | 140 | } |
1da177e4 LT |
141 | break; |
142 | ||
5f3b1a8b | 143 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 144 | { |
5f3b1a8b AS |
145 | struct acpi_madt_local_apic_override *p = |
146 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
147 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
148 | (void *)(unsigned long)p->address); | |
4be44fcd | 149 | } |
1da177e4 LT |
150 | break; |
151 | ||
5f3b1a8b | 152 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 153 | { |
5f3b1a8b AS |
154 | struct acpi_madt_io_sapic *p = |
155 | (struct acpi_madt_io_sapic *)header; | |
07f438df HG |
156 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
157 | p->id, (void *)(unsigned long)p->address, | |
158 | p->global_irq_base); | |
4be44fcd | 159 | } |
1da177e4 LT |
160 | break; |
161 | ||
5f3b1a8b | 162 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 163 | { |
5f3b1a8b AS |
164 | struct acpi_madt_local_sapic *p = |
165 | (struct acpi_madt_local_sapic *)header; | |
07f438df HG |
166 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
167 | p->processor_id, p->id, p->eid, | |
168 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 169 | } |
1da177e4 LT |
170 | break; |
171 | ||
5f3b1a8b | 172 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 173 | { |
5f3b1a8b AS |
174 | struct acpi_madt_interrupt_source *p = |
175 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
176 | pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n", |
177 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
178 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
179 | p->type, p->id, p->eid, p->io_sapic_vector, | |
180 | p->global_irq); | |
4be44fcd | 181 | } |
1da177e4 LT |
182 | break; |
183 | ||
4c1c8d7a HG |
184 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
185 | { | |
186 | struct acpi_madt_generic_interrupt *p = | |
187 | (struct acpi_madt_generic_interrupt *)header; | |
188 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", | |
189 | p->uid, p->base_address, | |
190 | p->arm_mpidr, | |
191 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
192 | ||
193 | } | |
194 | break; | |
195 | ||
196 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: | |
197 | { | |
198 | struct acpi_madt_generic_distributor *p = | |
199 | (struct acpi_madt_generic_distributor *)header; | |
200 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", | |
201 | p->gic_id, p->base_address, | |
202 | p->global_irq_base); | |
203 | } | |
204 | break; | |
205 | ||
1da177e4 | 206 | default: |
730bf5eb HG |
207 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
208 | header->type); | |
1da177e4 LT |
209 | break; |
210 | } | |
211 | } | |
212 | ||
9b3fedde LA |
213 | /** |
214 | * acpi_parse_entries_array - for each proc_num find a suitable subtable | |
215 | * | |
216 | * @id: table id (for debugging purposes) | |
217 | * @table_size: single entry size | |
218 | * @table_header: where does the table start? | |
219 | * @proc: array of acpi_subtable_proc struct containing entry id | |
220 | * and associated handler with it | |
221 | * @proc_num: how big proc is? | |
222 | * @max_entries: how many entries can we process? | |
223 | * | |
224 | * For each proc_num find a subtable with proc->id and run proc->handler | |
225 | * on it. Assumption is that there's only single handler for particular | |
226 | * entry id. | |
227 | * | |
228 | * On success returns sum of all matching entries for all proc handlers. | |
229 | * Otherwise, -ENODEV or -EINVAL is returned. | |
230 | */ | |
231 | static int __init | |
232 | acpi_parse_entries_array(char *id, unsigned long table_size, | |
f08bb472 | 233 | struct acpi_table_header *table_header, |
9b3fedde LA |
234 | struct acpi_subtable_proc *proc, int proc_num, |
235 | unsigned int max_entries) | |
1da177e4 | 236 | { |
5f3b1a8b | 237 | struct acpi_subtable_header *entry; |
6eb87fed | 238 | unsigned long table_end; |
9b3fedde LA |
239 | int count = 0; |
240 | int i; | |
1da177e4 | 241 | |
68ca4069 | 242 | if (acpi_disabled) |
e5b8fc6a LB |
243 | return -ENODEV; |
244 | ||
9b3fedde | 245 | if (!id) |
1da177e4 LT |
246 | return -EINVAL; |
247 | ||
f08bb472 AC |
248 | if (!table_size) |
249 | return -EINVAL; | |
1da177e4 | 250 | |
6eb87fed | 251 | if (!table_header) { |
730bf5eb | 252 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
253 | return -ENODEV; |
254 | } | |
255 | ||
6eb87fed | 256 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
257 | |
258 | /* Parse all entries looking for a match. */ | |
259 | ||
5f3b1a8b | 260 | entry = (struct acpi_subtable_header *) |
6eb87fed | 261 | ((unsigned long)table_header + table_size); |
1da177e4 | 262 | |
5f3b1a8b | 263 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
6eb87fed | 264 | table_end) { |
9b3fedde LA |
265 | if (max_entries && count >= max_entries) |
266 | break; | |
267 | ||
268 | for (i = 0; i < proc_num; i++) { | |
269 | if (entry->type != proc[i].id) | |
270 | continue; | |
362414d9 DC |
271 | if (!proc[i].handler || |
272 | proc[i].handler(entry, table_end)) | |
f08bb472 | 273 | return -EINVAL; |
369d913b | 274 | |
9b3fedde LA |
275 | proc->count++; |
276 | break; | |
4ceacd02 | 277 | } |
9b3fedde LA |
278 | if (i != proc_num) |
279 | count++; | |
4ceacd02 | 280 | |
369d913b FY |
281 | /* |
282 | * If entry->length is 0, break from this loop to avoid | |
283 | * infinite loop. | |
284 | */ | |
285 | if (entry->length == 0) { | |
9b3fedde | 286 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
f08bb472 | 287 | return -EINVAL; |
369d913b | 288 | } |
1da177e4 | 289 | |
5f3b1a8b | 290 | entry = (struct acpi_subtable_header *) |
4be44fcd | 291 | ((unsigned long)entry + entry->length); |
1da177e4 | 292 | } |
f08bb472 | 293 | |
1da177e4 | 294 | if (max_entries && count > max_entries) { |
730bf5eb | 295 | pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n", |
9b3fedde | 296 | id, proc->id, count - max_entries, count); |
1da177e4 LT |
297 | } |
298 | ||
299 | return count; | |
f08bb472 AC |
300 | } |
301 | ||
302 | int __init | |
9b3fedde LA |
303 | acpi_parse_entries(char *id, |
304 | unsigned long table_size, | |
305 | acpi_tbl_entry_handler handler, | |
306 | struct acpi_table_header *table_header, | |
307 | int entry_id, unsigned int max_entries) | |
308 | { | |
309 | struct acpi_subtable_proc proc = { | |
310 | .id = entry_id, | |
311 | .handler = handler, | |
312 | }; | |
313 | ||
314 | return acpi_parse_entries_array(id, table_size, table_header, | |
315 | &proc, 1, max_entries); | |
316 | } | |
317 | ||
318 | int __init | |
319 | acpi_table_parse_entries_array(char *id, | |
f08bb472 | 320 | unsigned long table_size, |
9b3fedde | 321 | struct acpi_subtable_proc *proc, int proc_num, |
f08bb472 AC |
322 | unsigned int max_entries) |
323 | { | |
324 | struct acpi_table_header *table_header = NULL; | |
325 | acpi_size tbl_size; | |
326 | int count; | |
327 | u32 instance = 0; | |
328 | ||
329 | if (acpi_disabled) | |
330 | return -ENODEV; | |
331 | ||
9b3fedde | 332 | if (!id) |
f08bb472 AC |
333 | return -EINVAL; |
334 | ||
335 | if (!strncmp(id, ACPI_SIG_MADT, 4)) | |
336 | instance = acpi_apic_instance; | |
337 | ||
338 | acpi_get_table_with_size(id, instance, &table_header, &tbl_size); | |
339 | if (!table_header) { | |
340 | pr_warn("%4.4s not present\n", id); | |
341 | return -ENODEV; | |
342 | } | |
343 | ||
9b3fedde LA |
344 | count = acpi_parse_entries_array(id, table_size, table_header, |
345 | proc, proc_num, max_entries); | |
f08bb472 | 346 | |
369d913b | 347 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); |
f08bb472 | 348 | return count; |
1da177e4 LT |
349 | } |
350 | ||
9b3fedde LA |
351 | int __init |
352 | acpi_table_parse_entries(char *id, | |
353 | unsigned long table_size, | |
354 | int entry_id, | |
355 | acpi_tbl_entry_handler handler, | |
356 | unsigned int max_entries) | |
357 | { | |
358 | struct acpi_subtable_proc proc = { | |
359 | .id = entry_id, | |
360 | .handler = handler, | |
361 | }; | |
362 | ||
363 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, | |
364 | max_entries); | |
365 | } | |
366 | ||
1da177e4 | 367 | int __init |
5f3b1a8b | 368 | acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 369 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 370 | { |
6eb87fed | 371 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
372 | sizeof(struct acpi_table_madt), id, |
373 | handler, max_entries); | |
1da177e4 LT |
374 | } |
375 | ||
7f8f97c3 LB |
376 | /** |
377 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
378 | * @id: table id to find |
379 | * @handler: handler to run | |
380 | * | |
381 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 382 | * run @handler on it. |
383 | * | |
384 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 385 | */ |
b43e1065 | 386 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 387 | { |
ceb6c468 | 388 | struct acpi_table_header *table = NULL; |
7d97277b | 389 | acpi_size tbl_size; |
a1fdcc0d | 390 | |
68ca4069 | 391 | if (acpi_disabled) |
e5b8fc6a LB |
392 | return -ENODEV; |
393 | ||
de2d1a7e | 394 | if (!id || !handler) |
1da177e4 LT |
395 | return -EINVAL; |
396 | ||
a1fdcc0d | 397 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
7d97277b | 398 | acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size); |
a1fdcc0d | 399 | else |
7d97277b | 400 | acpi_get_table_with_size(id, 0, &table, &tbl_size); |
a1fdcc0d | 401 | |
ceb6c468 AS |
402 | if (table) { |
403 | handler(table); | |
7d97277b | 404 | early_acpi_os_unmap_memory(table, tbl_size); |
ceb6c468 | 405 | return 0; |
7f8f97c3 | 406 | } else |
95df812d | 407 | return -ENODEV; |
1da177e4 LT |
408 | } |
409 | ||
a1fdcc0d LB |
410 | /* |
411 | * The BIOS is supposed to supply a single APIC/MADT, | |
412 | * but some report two. Provide a knob to use either. | |
413 | * (don't you wish instance 0 and 1 were not the same?) | |
414 | */ | |
415 | static void __init check_multiple_madt(void) | |
416 | { | |
417 | struct acpi_table_header *table = NULL; | |
7d97277b | 418 | acpi_size tbl_size; |
a1fdcc0d | 419 | |
7d97277b | 420 | acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size); |
a1fdcc0d | 421 | if (table) { |
730bf5eb HG |
422 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
423 | acpi_apic_instance); | |
424 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
425 | "notify linux-acpi@vger.kernel.org\n", | |
426 | acpi_apic_instance ? 0 : 2); | |
7d97277b | 427 | early_acpi_os_unmap_memory(table, tbl_size); |
a1fdcc0d LB |
428 | |
429 | } else | |
430 | acpi_apic_instance = 0; | |
431 | ||
432 | return; | |
433 | } | |
434 | ||
1da177e4 LT |
435 | /* |
436 | * acpi_table_init() | |
437 | * | |
438 | * find RSDP, find and checksum SDT/XSDT. | |
439 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 440 | * |
1da177e4 LT |
441 | * result: sdt_entry[] is initialized |
442 | */ | |
443 | ||
4be44fcd | 444 | int __init acpi_table_init(void) |
1da177e4 | 445 | { |
9e3a9d1e LB |
446 | acpi_status status; |
447 | ||
4fc0a7e8 LZ |
448 | if (acpi_verify_table_checksum) { |
449 | pr_info("Early table checksum verification enabled\n"); | |
450 | acpi_gbl_verify_table_checksum = TRUE; | |
451 | } else { | |
452 | pr_info("Early table checksum verification disabled\n"); | |
453 | acpi_gbl_verify_table_checksum = FALSE; | |
454 | } | |
455 | ||
9e3a9d1e LB |
456 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
457 | if (ACPI_FAILURE(status)) | |
95df812d | 458 | return -EINVAL; |
9e3a9d1e | 459 | |
a1fdcc0d LB |
460 | check_multiple_madt(); |
461 | return 0; | |
462 | } | |
463 | ||
464 | static int __init acpi_parse_apic_instance(char *str) | |
465 | { | |
f0df2d6b CG |
466 | if (!str) |
467 | return -EINVAL; | |
a1fdcc0d | 468 | |
3d915894 CJ |
469 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
470 | return -EINVAL; | |
a1fdcc0d | 471 | |
730bf5eb | 472 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 473 | |
1da177e4 LT |
474 | return 0; |
475 | } | |
a1fdcc0d LB |
476 | |
477 | early_param("acpi_apic_instance", acpi_parse_apic_instance); | |
4fc0a7e8 LZ |
478 | |
479 | static int __init acpi_force_table_verification_setup(char *s) | |
480 | { | |
481 | acpi_verify_table_checksum = true; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); |