Commit | Line | Data |
---|---|---|
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> | |
5ae74f2c LZ |
35 | #include <linux/earlycpio.h> |
36 | #include <linux/memblock.h> | |
c85cc817 | 37 | #include "internal.h" |
1da177e4 | 38 | |
74216699 RW |
39 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
40 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
41 | #endif | |
42 | ||
04348e69 | 43 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 44 | |
1da177e4 LT |
45 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
46 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
47 | ||
ad71860a | 48 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 49 | |
4e381a4f | 50 | static int acpi_apic_instance __initdata; |
a1fdcc0d | 51 | |
4fc0a7e8 LZ |
52 | /* |
53 | * Disable table checksum verification for the early stage due to the size | |
54 | * limitation of the current x86 early mapping implementation. | |
55 | */ | |
56 | static bool acpi_verify_table_checksum __initdata = false; | |
57 | ||
a1fdcc0d | 58 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
59 | { |
60 | if (!header) | |
61 | return; | |
62 | ||
63 | switch (header->type) { | |
64 | ||
5f3b1a8b | 65 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 66 | { |
5f3b1a8b AS |
67 | struct acpi_madt_local_apic *p = |
68 | (struct acpi_madt_local_apic *)header; | |
07f438df HG |
69 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
70 | p->processor_id, p->id, | |
71 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 72 | } |
1da177e4 LT |
73 | break; |
74 | ||
7237d3de SS |
75 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
76 | { | |
77 | struct acpi_madt_local_x2apic *p = | |
78 | (struct acpi_madt_local_x2apic *)header; | |
07f438df HG |
79 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
80 | p->local_apic_id, p->uid, | |
81 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
82 | } |
83 | break; | |
84 | ||
5f3b1a8b | 85 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 86 | { |
5f3b1a8b AS |
87 | struct acpi_madt_io_apic *p = |
88 | (struct acpi_madt_io_apic *)header; | |
07f438df HG |
89 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
90 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 91 | } |
1da177e4 LT |
92 | break; |
93 | ||
5f3b1a8b | 94 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 95 | { |
5f3b1a8b AS |
96 | struct acpi_madt_interrupt_override *p = |
97 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
98 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
99 | p->bus, p->source_irq, p->global_irq, | |
100 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
101 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
102 | if (p->inti_flags & |
103 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
104 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
105 | p->inti_flags & | |
5f3b1a8b | 106 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 107 | } |
1da177e4 LT |
108 | break; |
109 | ||
5f3b1a8b | 110 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 111 | { |
5f3b1a8b AS |
112 | struct acpi_madt_nmi_source *p = |
113 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
114 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
115 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
116 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
117 | p->global_irq); | |
4be44fcd | 118 | } |
1da177e4 LT |
119 | break; |
120 | ||
5f3b1a8b | 121 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 122 | { |
5f3b1a8b AS |
123 | struct acpi_madt_local_apic_nmi *p = |
124 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
125 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
126 | p->processor_id, | |
127 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
128 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
129 | p->lint); | |
7237d3de SS |
130 | } |
131 | break; | |
132 | ||
133 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
134 | { | |
135 | u16 polarity, trigger; | |
136 | struct acpi_madt_local_x2apic_nmi *p = | |
137 | (struct acpi_madt_local_x2apic_nmi *)header; | |
138 | ||
139 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
140 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
141 | ||
730bf5eb HG |
142 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
143 | p->uid, | |
144 | mps_inti_flags_polarity[polarity], | |
145 | mps_inti_flags_trigger[trigger], | |
146 | p->lint); | |
4be44fcd | 147 | } |
1da177e4 LT |
148 | break; |
149 | ||
5f3b1a8b | 150 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 151 | { |
5f3b1a8b AS |
152 | struct acpi_madt_local_apic_override *p = |
153 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
154 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
155 | (void *)(unsigned long)p->address); | |
4be44fcd | 156 | } |
1da177e4 LT |
157 | break; |
158 | ||
5f3b1a8b | 159 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 160 | { |
5f3b1a8b AS |
161 | struct acpi_madt_io_sapic *p = |
162 | (struct acpi_madt_io_sapic *)header; | |
07f438df HG |
163 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
164 | p->id, (void *)(unsigned long)p->address, | |
165 | p->global_irq_base); | |
4be44fcd | 166 | } |
1da177e4 LT |
167 | break; |
168 | ||
5f3b1a8b | 169 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 170 | { |
5f3b1a8b AS |
171 | struct acpi_madt_local_sapic *p = |
172 | (struct acpi_madt_local_sapic *)header; | |
07f438df HG |
173 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
174 | p->processor_id, p->id, p->eid, | |
175 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 176 | } |
1da177e4 LT |
177 | break; |
178 | ||
5f3b1a8b | 179 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 180 | { |
5f3b1a8b AS |
181 | struct acpi_madt_interrupt_source *p = |
182 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
183 | 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", |
184 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
185 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
186 | p->type, p->id, p->eid, p->io_sapic_vector, | |
187 | p->global_irq); | |
4be44fcd | 188 | } |
1da177e4 LT |
189 | break; |
190 | ||
4c1c8d7a HG |
191 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
192 | { | |
193 | struct acpi_madt_generic_interrupt *p = | |
194 | (struct acpi_madt_generic_interrupt *)header; | |
195 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", | |
196 | p->uid, p->base_address, | |
197 | p->arm_mpidr, | |
198 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
199 | ||
200 | } | |
201 | break; | |
202 | ||
203 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: | |
204 | { | |
205 | struct acpi_madt_generic_distributor *p = | |
206 | (struct acpi_madt_generic_distributor *)header; | |
207 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", | |
208 | p->gic_id, p->base_address, | |
209 | p->global_irq_base); | |
210 | } | |
211 | break; | |
212 | ||
1da177e4 | 213 | default: |
730bf5eb HG |
214 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
215 | header->type); | |
1da177e4 LT |
216 | break; |
217 | } | |
218 | } | |
219 | ||
9b3fedde LA |
220 | /** |
221 | * acpi_parse_entries_array - for each proc_num find a suitable subtable | |
222 | * | |
223 | * @id: table id (for debugging purposes) | |
224 | * @table_size: single entry size | |
225 | * @table_header: where does the table start? | |
226 | * @proc: array of acpi_subtable_proc struct containing entry id | |
227 | * and associated handler with it | |
228 | * @proc_num: how big proc is? | |
229 | * @max_entries: how many entries can we process? | |
230 | * | |
231 | * For each proc_num find a subtable with proc->id and run proc->handler | |
232 | * on it. Assumption is that there's only single handler for particular | |
233 | * entry id. | |
234 | * | |
235 | * On success returns sum of all matching entries for all proc handlers. | |
236 | * Otherwise, -ENODEV or -EINVAL is returned. | |
237 | */ | |
238 | static int __init | |
239 | acpi_parse_entries_array(char *id, unsigned long table_size, | |
f08bb472 | 240 | struct acpi_table_header *table_header, |
9b3fedde LA |
241 | struct acpi_subtable_proc *proc, int proc_num, |
242 | unsigned int max_entries) | |
1da177e4 | 243 | { |
5f3b1a8b | 244 | struct acpi_subtable_header *entry; |
6eb87fed | 245 | unsigned long table_end; |
9b3fedde LA |
246 | int count = 0; |
247 | int i; | |
1da177e4 | 248 | |
68ca4069 | 249 | if (acpi_disabled) |
e5b8fc6a LB |
250 | return -ENODEV; |
251 | ||
9b3fedde | 252 | if (!id) |
1da177e4 LT |
253 | return -EINVAL; |
254 | ||
f08bb472 AC |
255 | if (!table_size) |
256 | return -EINVAL; | |
1da177e4 | 257 | |
6eb87fed | 258 | if (!table_header) { |
730bf5eb | 259 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
260 | return -ENODEV; |
261 | } | |
262 | ||
6eb87fed | 263 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
264 | |
265 | /* Parse all entries looking for a match. */ | |
266 | ||
5f3b1a8b | 267 | entry = (struct acpi_subtable_header *) |
6eb87fed | 268 | ((unsigned long)table_header + table_size); |
1da177e4 | 269 | |
5f3b1a8b | 270 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
6eb87fed | 271 | table_end) { |
9b3fedde LA |
272 | if (max_entries && count >= max_entries) |
273 | break; | |
274 | ||
275 | for (i = 0; i < proc_num; i++) { | |
276 | if (entry->type != proc[i].id) | |
277 | continue; | |
362414d9 DC |
278 | if (!proc[i].handler || |
279 | proc[i].handler(entry, table_end)) | |
f08bb472 | 280 | return -EINVAL; |
369d913b | 281 | |
9b3fedde LA |
282 | proc->count++; |
283 | break; | |
4ceacd02 | 284 | } |
9b3fedde LA |
285 | if (i != proc_num) |
286 | count++; | |
4ceacd02 | 287 | |
369d913b FY |
288 | /* |
289 | * If entry->length is 0, break from this loop to avoid | |
290 | * infinite loop. | |
291 | */ | |
292 | if (entry->length == 0) { | |
9b3fedde | 293 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
f08bb472 | 294 | return -EINVAL; |
369d913b | 295 | } |
1da177e4 | 296 | |
5f3b1a8b | 297 | entry = (struct acpi_subtable_header *) |
4be44fcd | 298 | ((unsigned long)entry + entry->length); |
1da177e4 | 299 | } |
f08bb472 | 300 | |
1da177e4 | 301 | if (max_entries && count > max_entries) { |
730bf5eb | 302 | pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n", |
9b3fedde | 303 | id, proc->id, count - max_entries, count); |
1da177e4 LT |
304 | } |
305 | ||
306 | return count; | |
f08bb472 AC |
307 | } |
308 | ||
309 | int __init | |
9b3fedde LA |
310 | acpi_parse_entries(char *id, |
311 | unsigned long table_size, | |
312 | acpi_tbl_entry_handler handler, | |
313 | struct acpi_table_header *table_header, | |
314 | int entry_id, unsigned int max_entries) | |
315 | { | |
316 | struct acpi_subtable_proc proc = { | |
317 | .id = entry_id, | |
318 | .handler = handler, | |
319 | }; | |
320 | ||
321 | return acpi_parse_entries_array(id, table_size, table_header, | |
322 | &proc, 1, max_entries); | |
323 | } | |
324 | ||
325 | int __init | |
326 | acpi_table_parse_entries_array(char *id, | |
f08bb472 | 327 | unsigned long table_size, |
9b3fedde | 328 | struct acpi_subtable_proc *proc, int proc_num, |
f08bb472 AC |
329 | unsigned int max_entries) |
330 | { | |
331 | struct acpi_table_header *table_header = NULL; | |
332 | acpi_size tbl_size; | |
333 | int count; | |
334 | u32 instance = 0; | |
335 | ||
336 | if (acpi_disabled) | |
337 | return -ENODEV; | |
338 | ||
9b3fedde | 339 | if (!id) |
f08bb472 AC |
340 | return -EINVAL; |
341 | ||
342 | if (!strncmp(id, ACPI_SIG_MADT, 4)) | |
343 | instance = acpi_apic_instance; | |
344 | ||
345 | acpi_get_table_with_size(id, instance, &table_header, &tbl_size); | |
346 | if (!table_header) { | |
347 | pr_warn("%4.4s not present\n", id); | |
348 | return -ENODEV; | |
349 | } | |
350 | ||
9b3fedde LA |
351 | count = acpi_parse_entries_array(id, table_size, table_header, |
352 | proc, proc_num, max_entries); | |
f08bb472 | 353 | |
369d913b | 354 | early_acpi_os_unmap_memory((char *)table_header, tbl_size); |
f08bb472 | 355 | return count; |
1da177e4 LT |
356 | } |
357 | ||
9b3fedde LA |
358 | int __init |
359 | acpi_table_parse_entries(char *id, | |
360 | unsigned long table_size, | |
361 | int entry_id, | |
362 | acpi_tbl_entry_handler handler, | |
363 | unsigned int max_entries) | |
364 | { | |
365 | struct acpi_subtable_proc proc = { | |
366 | .id = entry_id, | |
367 | .handler = handler, | |
368 | }; | |
369 | ||
370 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, | |
371 | max_entries); | |
372 | } | |
373 | ||
1da177e4 | 374 | int __init |
5f3b1a8b | 375 | acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 376 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 377 | { |
6eb87fed | 378 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
379 | sizeof(struct acpi_table_madt), id, |
380 | handler, max_entries); | |
1da177e4 LT |
381 | } |
382 | ||
7f8f97c3 LB |
383 | /** |
384 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
385 | * @id: table id to find |
386 | * @handler: handler to run | |
387 | * | |
388 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 389 | * run @handler on it. |
390 | * | |
391 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 392 | */ |
b43e1065 | 393 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 394 | { |
ceb6c468 | 395 | struct acpi_table_header *table = NULL; |
7d97277b | 396 | acpi_size tbl_size; |
a1fdcc0d | 397 | |
68ca4069 | 398 | if (acpi_disabled) |
e5b8fc6a LB |
399 | return -ENODEV; |
400 | ||
de2d1a7e | 401 | if (!id || !handler) |
1da177e4 LT |
402 | return -EINVAL; |
403 | ||
a1fdcc0d | 404 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
7d97277b | 405 | acpi_get_table_with_size(id, acpi_apic_instance, &table, &tbl_size); |
a1fdcc0d | 406 | else |
7d97277b | 407 | acpi_get_table_with_size(id, 0, &table, &tbl_size); |
a1fdcc0d | 408 | |
ceb6c468 AS |
409 | if (table) { |
410 | handler(table); | |
7d97277b | 411 | early_acpi_os_unmap_memory(table, tbl_size); |
ceb6c468 | 412 | return 0; |
7f8f97c3 | 413 | } else |
95df812d | 414 | return -ENODEV; |
1da177e4 LT |
415 | } |
416 | ||
a1fdcc0d LB |
417 | /* |
418 | * The BIOS is supposed to supply a single APIC/MADT, | |
419 | * but some report two. Provide a knob to use either. | |
420 | * (don't you wish instance 0 and 1 were not the same?) | |
421 | */ | |
422 | static void __init check_multiple_madt(void) | |
423 | { | |
424 | struct acpi_table_header *table = NULL; | |
7d97277b | 425 | acpi_size tbl_size; |
a1fdcc0d | 426 | |
7d97277b | 427 | acpi_get_table_with_size(ACPI_SIG_MADT, 2, &table, &tbl_size); |
a1fdcc0d | 428 | if (table) { |
730bf5eb HG |
429 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
430 | acpi_apic_instance); | |
431 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
432 | "notify linux-acpi@vger.kernel.org\n", | |
433 | acpi_apic_instance ? 0 : 2); | |
7d97277b | 434 | early_acpi_os_unmap_memory(table, tbl_size); |
a1fdcc0d LB |
435 | |
436 | } else | |
437 | acpi_apic_instance = 0; | |
438 | ||
439 | return; | |
440 | } | |
441 | ||
5ae74f2c LZ |
442 | static void acpi_table_taint(struct acpi_table_header *table) |
443 | { | |
444 | pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
445 | table->signature, table->oem_table_id); | |
446 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); | |
447 | } | |
448 | ||
5d881327 | 449 | #ifdef CONFIG_ACPI_TABLE_UPGRADE |
5ae74f2c LZ |
450 | static u64 acpi_tables_addr; |
451 | static int all_tables_size; | |
452 | ||
453 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
454 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
455 | { | |
456 | u8 sum = 0; | |
457 | u8 *end = buffer + length; | |
458 | ||
459 | while (buffer < end) | |
460 | sum = (u8) (sum + *(buffer++)); | |
461 | return sum; | |
462 | } | |
463 | ||
464 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
465 | static const char * const table_sigs[] = { | |
466 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
467 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
468 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
469 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
470 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
471 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
472 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
473 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
474 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
475 | ||
476 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) | |
477 | ||
5d881327 LZ |
478 | #define NR_ACPI_INITRD_TABLES 64 |
479 | static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES]; | |
480 | static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES); | |
5ae74f2c LZ |
481 | |
482 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
483 | ||
484 | static void __init acpi_table_initrd_init(void *data, size_t size) | |
485 | { | |
486 | int sig, no, table_nr = 0, total_offset = 0; | |
487 | long offset = 0; | |
488 | struct acpi_table_header *table; | |
489 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
490 | struct cpio_data file; | |
491 | ||
492 | if (data == NULL || size == 0) | |
493 | return; | |
494 | ||
5d881327 | 495 | for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) { |
5ae74f2c LZ |
496 | file = find_cpio_data(cpio_path, data, size, &offset); |
497 | if (!file.data) | |
498 | break; | |
499 | ||
500 | data += offset; | |
501 | size -= offset; | |
502 | ||
503 | if (file.size < sizeof(struct acpi_table_header)) { | |
504 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
505 | cpio_path, file.name); | |
506 | continue; | |
507 | } | |
508 | ||
509 | table = file.data; | |
510 | ||
511 | for (sig = 0; table_sigs[sig]; sig++) | |
512 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
513 | break; | |
514 | ||
515 | if (!table_sigs[sig]) { | |
516 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
517 | cpio_path, file.name); | |
518 | continue; | |
519 | } | |
520 | if (file.size != table->length) { | |
521 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
522 | cpio_path, file.name); | |
523 | continue; | |
524 | } | |
525 | if (acpi_table_checksum(file.data, table->length)) { | |
526 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
527 | cpio_path, file.name); | |
528 | continue; | |
529 | } | |
530 | ||
531 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
532 | table->signature, cpio_path, file.name, table->length); | |
533 | ||
534 | all_tables_size += table->length; | |
535 | acpi_initrd_files[table_nr].data = file.data; | |
536 | acpi_initrd_files[table_nr].size = file.size; | |
537 | table_nr++; | |
538 | } | |
539 | if (table_nr == 0) | |
540 | return; | |
541 | ||
542 | acpi_tables_addr = | |
543 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
544 | all_tables_size, PAGE_SIZE); | |
545 | if (!acpi_tables_addr) { | |
546 | WARN_ON(1); | |
547 | return; | |
548 | } | |
549 | /* | |
550 | * Only calling e820_add_reserve does not work and the | |
551 | * tables are invalid (memory got used) later. | |
552 | * memblock_reserve works as expected and the tables won't get modified. | |
553 | * But it's not enough on X86 because ioremap will | |
554 | * complain later (used by acpi_os_map_memory) that the pages | |
555 | * that should get mapped are not marked "reserved". | |
556 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
557 | * works fine. | |
558 | */ | |
559 | memblock_reserve(acpi_tables_addr, all_tables_size); | |
560 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); | |
561 | ||
562 | /* | |
563 | * early_ioremap only can remap 256k one time. If we map all | |
564 | * tables one time, we will hit the limit. Need to map chunks | |
565 | * one by one during copying the same as that in relocate_initrd(). | |
566 | */ | |
567 | for (no = 0; no < table_nr; no++) { | |
568 | unsigned char *src_p = acpi_initrd_files[no].data; | |
569 | phys_addr_t size = acpi_initrd_files[no].size; | |
570 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
571 | phys_addr_t slop, clen; | |
572 | char *dest_p; | |
573 | ||
574 | total_offset += size; | |
575 | ||
576 | while (size) { | |
577 | slop = dest_addr & ~PAGE_MASK; | |
578 | clen = size; | |
579 | if (clen > MAP_CHUNK_SIZE - slop) | |
580 | clen = MAP_CHUNK_SIZE - slop; | |
581 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
582 | clen + slop); | |
583 | memcpy(dest_p + slop, src_p, clen); | |
584 | early_iounmap(dest_p, clen + slop); | |
585 | src_p += clen; | |
586 | dest_addr += clen; | |
587 | size -= clen; | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
592 | static acpi_status | |
593 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
594 | acpi_physical_address *address, u32 *length) | |
595 | { | |
596 | int table_offset = 0; | |
597 | int table_index = 0; | |
598 | struct acpi_table_header *table; | |
599 | u32 table_length; | |
600 | ||
601 | *length = 0; | |
602 | *address = 0; | |
603 | if (!acpi_tables_addr) | |
604 | return AE_OK; | |
605 | ||
606 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
607 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
608 | ACPI_HEADER_SIZE); | |
609 | if (table_offset + table->length > all_tables_size) { | |
610 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
611 | WARN_ON(1); | |
612 | return AE_OK; | |
613 | } | |
614 | ||
615 | table_length = table->length; | |
616 | ||
617 | /* Only override tables matched */ | |
5d881327 LZ |
618 | if (memcmp(existing_table->signature, table->signature, 4) || |
619 | memcmp(table->oem_id, existing_table->oem_id, | |
620 | ACPI_OEM_ID_SIZE) || | |
5ae74f2c LZ |
621 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
622 | ACPI_OEM_TABLE_ID_SIZE)) { | |
623 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
624 | goto next_table; | |
625 | } | |
5d881327 LZ |
626 | /* |
627 | * Mark the table to avoid being used in | |
628 | * acpi_table_initrd_scan() and check the revision. | |
629 | */ | |
630 | if (test_and_set_bit(table_index, acpi_initrd_installed) || | |
631 | existing_table->oem_revision >= table->oem_revision) { | |
632 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
633 | goto next_table; | |
634 | } | |
5ae74f2c LZ |
635 | |
636 | *length = table_length; | |
637 | *address = acpi_tables_addr + table_offset; | |
5d881327 LZ |
638 | pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n", |
639 | table->signature, table->oem_id, | |
640 | table->oem_table_id); | |
5ae74f2c | 641 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
5ae74f2c LZ |
642 | break; |
643 | ||
644 | next_table: | |
645 | table_offset += table_length; | |
646 | table_index++; | |
647 | } | |
648 | return AE_OK; | |
649 | } | |
650 | ||
651 | static void __init acpi_table_initrd_scan(void) | |
652 | { | |
653 | int table_offset = 0; | |
654 | int table_index = 0; | |
655 | u32 table_length; | |
656 | struct acpi_table_header *table; | |
657 | ||
658 | if (!acpi_tables_addr) | |
659 | return; | |
660 | ||
661 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
662 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
663 | ACPI_HEADER_SIZE); | |
664 | if (table_offset + table->length > all_tables_size) { | |
665 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
666 | WARN_ON(1); | |
667 | return; | |
668 | } | |
669 | ||
670 | table_length = table->length; | |
671 | ||
672 | /* Skip RSDT/XSDT which should only be used for override */ | |
5d881327 | 673 | if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) || |
5ae74f2c LZ |
674 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) { |
675 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
676 | goto next_table; | |
677 | } | |
5d881327 LZ |
678 | /* |
679 | * Mark the table to avoid being used in | |
680 | * acpi_table_initrd_override(). Though this is not possible | |
681 | * because override is disabled in acpi_install_table(). | |
682 | */ | |
683 | if (test_and_set_bit(table_index, acpi_initrd_installed)) { | |
684 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
685 | goto next_table; | |
686 | } | |
5ae74f2c | 687 | |
5d881327 LZ |
688 | pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n", |
689 | table->signature, table->oem_id, | |
690 | table->oem_table_id); | |
5ae74f2c LZ |
691 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
692 | acpi_install_table(acpi_tables_addr + table_offset, TRUE); | |
5ae74f2c LZ |
693 | next_table: |
694 | table_offset += table_length; | |
695 | table_index++; | |
696 | } | |
697 | } | |
698 | #else | |
699 | static void __init acpi_table_initrd_init(void *data, size_t size) | |
700 | { | |
701 | } | |
702 | ||
703 | static acpi_status | |
704 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
705 | acpi_physical_address *address, | |
706 | u32 *table_length) | |
707 | { | |
708 | *table_length = 0; | |
709 | *address = 0; | |
710 | return AE_OK; | |
711 | } | |
712 | ||
713 | static void __init acpi_table_initrd_scan(void) | |
714 | { | |
715 | } | |
5d881327 | 716 | #endif /* CONFIG_ACPI_TABLE_UPGRADE */ |
5ae74f2c LZ |
717 | |
718 | acpi_status | |
719 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
720 | acpi_physical_address *address, | |
721 | u32 *table_length) | |
722 | { | |
723 | return acpi_table_initrd_override(existing_table, address, | |
724 | table_length); | |
725 | } | |
726 | ||
727 | acpi_status | |
728 | acpi_os_table_override(struct acpi_table_header *existing_table, | |
729 | struct acpi_table_header **new_table) | |
730 | { | |
731 | if (!existing_table || !new_table) | |
732 | return AE_BAD_PARAMETER; | |
733 | ||
734 | *new_table = NULL; | |
735 | ||
736 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
737 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
738 | *new_table = (struct acpi_table_header *)AmlCode; | |
739 | #endif | |
740 | if (*new_table != NULL) | |
741 | acpi_table_taint(existing_table); | |
742 | return AE_OK; | |
743 | } | |
744 | ||
745 | void __init early_acpi_table_init(void *data, size_t size) | |
746 | { | |
747 | acpi_table_initrd_init(data, size); | |
748 | } | |
749 | ||
1da177e4 LT |
750 | /* |
751 | * acpi_table_init() | |
752 | * | |
753 | * find RSDP, find and checksum SDT/XSDT. | |
754 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 755 | * |
1da177e4 LT |
756 | * result: sdt_entry[] is initialized |
757 | */ | |
758 | ||
4be44fcd | 759 | int __init acpi_table_init(void) |
1da177e4 | 760 | { |
9e3a9d1e LB |
761 | acpi_status status; |
762 | ||
4fc0a7e8 LZ |
763 | if (acpi_verify_table_checksum) { |
764 | pr_info("Early table checksum verification enabled\n"); | |
765 | acpi_gbl_verify_table_checksum = TRUE; | |
766 | } else { | |
767 | pr_info("Early table checksum verification disabled\n"); | |
768 | acpi_gbl_verify_table_checksum = FALSE; | |
769 | } | |
770 | ||
9e3a9d1e LB |
771 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
772 | if (ACPI_FAILURE(status)) | |
95df812d | 773 | return -EINVAL; |
5ae74f2c | 774 | acpi_table_initrd_scan(); |
9e3a9d1e | 775 | |
a1fdcc0d LB |
776 | check_multiple_madt(); |
777 | return 0; | |
778 | } | |
779 | ||
780 | static int __init acpi_parse_apic_instance(char *str) | |
781 | { | |
f0df2d6b CG |
782 | if (!str) |
783 | return -EINVAL; | |
a1fdcc0d | 784 | |
3d915894 CJ |
785 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
786 | return -EINVAL; | |
a1fdcc0d | 787 | |
730bf5eb | 788 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 789 | |
1da177e4 LT |
790 | return 0; |
791 | } | |
a1fdcc0d LB |
792 | |
793 | early_param("acpi_apic_instance", acpi_parse_apic_instance); | |
4fc0a7e8 LZ |
794 | |
795 | static int __init acpi_force_table_verification_setup(char *s) | |
796 | { | |
797 | acpi_verify_table_checksum = true; | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); | |
b2ca5dae CIK |
803 | |
804 | static int __init acpi_force_32bit_fadt_addr(char *s) | |
805 | { | |
806 | pr_info("Forcing 32 Bit FADT addresses\n"); | |
807 | acpi_gbl_use32_bit_fadt_addresses = TRUE; | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |