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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> | |
5ae74f2c LZ |
35 | #include <linux/earlycpio.h> |
36 | #include <linux/memblock.h> | |
da3d3f98 | 37 | #include <linux/initrd.h> |
c85cc817 | 38 | #include "internal.h" |
1da177e4 | 39 | |
74216699 RW |
40 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
41 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
42 | #endif | |
43 | ||
04348e69 | 44 | #define ACPI_MAX_TABLES 128 |
1da177e4 | 45 | |
1da177e4 LT |
46 | static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
47 | static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; | |
48 | ||
ad71860a | 49 | static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
1da177e4 | 50 | |
4e381a4f | 51 | static int acpi_apic_instance __initdata; |
a1fdcc0d | 52 | |
4fc0a7e8 LZ |
53 | /* |
54 | * Disable table checksum verification for the early stage due to the size | |
55 | * limitation of the current x86 early mapping implementation. | |
56 | */ | |
57 | static bool acpi_verify_table_checksum __initdata = false; | |
58 | ||
a1fdcc0d | 59 | void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
1da177e4 LT |
60 | { |
61 | if (!header) | |
62 | return; | |
63 | ||
64 | switch (header->type) { | |
65 | ||
5f3b1a8b | 66 | case ACPI_MADT_TYPE_LOCAL_APIC: |
4be44fcd | 67 | { |
5f3b1a8b AS |
68 | struct acpi_madt_local_apic *p = |
69 | (struct acpi_madt_local_apic *)header; | |
07f438df HG |
70 | pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
71 | p->processor_id, p->id, | |
72 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 73 | } |
1da177e4 LT |
74 | break; |
75 | ||
7237d3de SS |
76 | case ACPI_MADT_TYPE_LOCAL_X2APIC: |
77 | { | |
78 | struct acpi_madt_local_x2apic *p = | |
79 | (struct acpi_madt_local_x2apic *)header; | |
07f438df HG |
80 | pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
81 | p->local_apic_id, p->uid, | |
82 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
7237d3de SS |
83 | } |
84 | break; | |
85 | ||
5f3b1a8b | 86 | case ACPI_MADT_TYPE_IO_APIC: |
4be44fcd | 87 | { |
5f3b1a8b AS |
88 | struct acpi_madt_io_apic *p = |
89 | (struct acpi_madt_io_apic *)header; | |
07f438df HG |
90 | pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
91 | p->id, p->address, p->global_irq_base); | |
4be44fcd | 92 | } |
1da177e4 LT |
93 | break; |
94 | ||
5f3b1a8b | 95 | case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
4be44fcd | 96 | { |
5f3b1a8b AS |
97 | struct acpi_madt_interrupt_override *p = |
98 | (struct acpi_madt_interrupt_override *)header; | |
730bf5eb HG |
99 | pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
100 | p->bus, p->source_irq, p->global_irq, | |
101 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
102 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); | |
5f3b1a8b AS |
103 | if (p->inti_flags & |
104 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) | |
730bf5eb HG |
105 | pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
106 | p->inti_flags & | |
5f3b1a8b | 107 | ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
4be44fcd | 108 | } |
1da177e4 LT |
109 | break; |
110 | ||
5f3b1a8b | 111 | case ACPI_MADT_TYPE_NMI_SOURCE: |
4be44fcd | 112 | { |
5f3b1a8b AS |
113 | struct acpi_madt_nmi_source *p = |
114 | (struct acpi_madt_nmi_source *)header; | |
730bf5eb HG |
115 | pr_info("NMI_SRC (%s %s global_irq %d)\n", |
116 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
117 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
118 | p->global_irq); | |
4be44fcd | 119 | } |
1da177e4 LT |
120 | break; |
121 | ||
5f3b1a8b | 122 | case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
4be44fcd | 123 | { |
5f3b1a8b AS |
124 | struct acpi_madt_local_apic_nmi *p = |
125 | (struct acpi_madt_local_apic_nmi *)header; | |
730bf5eb HG |
126 | pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
127 | p->processor_id, | |
128 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], | |
129 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
130 | p->lint); | |
7237d3de SS |
131 | } |
132 | break; | |
133 | ||
134 | case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: | |
135 | { | |
136 | u16 polarity, trigger; | |
137 | struct acpi_madt_local_x2apic_nmi *p = | |
138 | (struct acpi_madt_local_x2apic_nmi *)header; | |
139 | ||
140 | polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; | |
141 | trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; | |
142 | ||
730bf5eb HG |
143 | pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
144 | p->uid, | |
145 | mps_inti_flags_polarity[polarity], | |
146 | mps_inti_flags_trigger[trigger], | |
147 | p->lint); | |
4be44fcd | 148 | } |
1da177e4 LT |
149 | break; |
150 | ||
5f3b1a8b | 151 | case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
4be44fcd | 152 | { |
5f3b1a8b AS |
153 | struct acpi_madt_local_apic_override *p = |
154 | (struct acpi_madt_local_apic_override *)header; | |
730bf5eb HG |
155 | pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
156 | (void *)(unsigned long)p->address); | |
4be44fcd | 157 | } |
1da177e4 LT |
158 | break; |
159 | ||
5f3b1a8b | 160 | case ACPI_MADT_TYPE_IO_SAPIC: |
4be44fcd | 161 | { |
5f3b1a8b AS |
162 | struct acpi_madt_io_sapic *p = |
163 | (struct acpi_madt_io_sapic *)header; | |
07f438df HG |
164 | pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
165 | p->id, (void *)(unsigned long)p->address, | |
166 | p->global_irq_base); | |
4be44fcd | 167 | } |
1da177e4 LT |
168 | break; |
169 | ||
5f3b1a8b | 170 | case ACPI_MADT_TYPE_LOCAL_SAPIC: |
4be44fcd | 171 | { |
5f3b1a8b AS |
172 | struct acpi_madt_local_sapic *p = |
173 | (struct acpi_madt_local_sapic *)header; | |
07f438df HG |
174 | pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
175 | p->processor_id, p->id, p->eid, | |
176 | (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
4be44fcd | 177 | } |
1da177e4 LT |
178 | break; |
179 | ||
5f3b1a8b | 180 | case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
4be44fcd | 181 | { |
5f3b1a8b AS |
182 | struct acpi_madt_interrupt_source *p = |
183 | (struct acpi_madt_interrupt_source *)header; | |
730bf5eb HG |
184 | 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", |
185 | mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], | |
186 | mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], | |
187 | p->type, p->id, p->eid, p->io_sapic_vector, | |
188 | p->global_irq); | |
4be44fcd | 189 | } |
1da177e4 LT |
190 | break; |
191 | ||
4c1c8d7a HG |
192 | case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
193 | { | |
194 | struct acpi_madt_generic_interrupt *p = | |
195 | (struct acpi_madt_generic_interrupt *)header; | |
196 | pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", | |
197 | p->uid, p->base_address, | |
198 | p->arm_mpidr, | |
199 | (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); | |
200 | ||
201 | } | |
202 | break; | |
203 | ||
204 | case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: | |
205 | { | |
206 | struct acpi_madt_generic_distributor *p = | |
207 | (struct acpi_madt_generic_distributor *)header; | |
208 | pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", | |
209 | p->gic_id, p->base_address, | |
210 | p->global_irq_base); | |
211 | } | |
212 | break; | |
213 | ||
1da177e4 | 214 | default: |
730bf5eb HG |
215 | pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
216 | header->type); | |
1da177e4 LT |
217 | break; |
218 | } | |
219 | } | |
220 | ||
9b3fedde LA |
221 | /** |
222 | * acpi_parse_entries_array - for each proc_num find a suitable subtable | |
223 | * | |
224 | * @id: table id (for debugging purposes) | |
225 | * @table_size: single entry size | |
226 | * @table_header: where does the table start? | |
227 | * @proc: array of acpi_subtable_proc struct containing entry id | |
228 | * and associated handler with it | |
229 | * @proc_num: how big proc is? | |
230 | * @max_entries: how many entries can we process? | |
231 | * | |
232 | * For each proc_num find a subtable with proc->id and run proc->handler | |
233 | * on it. Assumption is that there's only single handler for particular | |
234 | * entry id. | |
235 | * | |
236 | * On success returns sum of all matching entries for all proc handlers. | |
237 | * Otherwise, -ENODEV or -EINVAL is returned. | |
238 | */ | |
239 | static int __init | |
240 | acpi_parse_entries_array(char *id, unsigned long table_size, | |
f08bb472 | 241 | struct acpi_table_header *table_header, |
9b3fedde LA |
242 | struct acpi_subtable_proc *proc, int proc_num, |
243 | unsigned int max_entries) | |
1da177e4 | 244 | { |
5f3b1a8b | 245 | struct acpi_subtable_header *entry; |
6eb87fed | 246 | unsigned long table_end; |
9b3fedde | 247 | int count = 0; |
8726d4f4 | 248 | int errs = 0; |
9b3fedde | 249 | int i; |
1da177e4 | 250 | |
68ca4069 | 251 | if (acpi_disabled) |
e5b8fc6a LB |
252 | return -ENODEV; |
253 | ||
9b3fedde | 254 | if (!id) |
1da177e4 LT |
255 | return -EINVAL; |
256 | ||
f08bb472 AC |
257 | if (!table_size) |
258 | return -EINVAL; | |
1da177e4 | 259 | |
6eb87fed | 260 | if (!table_header) { |
730bf5eb | 261 | pr_warn("%4.4s not present\n", id); |
1da177e4 LT |
262 | return -ENODEV; |
263 | } | |
264 | ||
6eb87fed | 265 | table_end = (unsigned long)table_header + table_header->length; |
1da177e4 LT |
266 | |
267 | /* Parse all entries looking for a match. */ | |
268 | ||
5f3b1a8b | 269 | entry = (struct acpi_subtable_header *) |
6eb87fed | 270 | ((unsigned long)table_header + table_size); |
1da177e4 | 271 | |
5f3b1a8b | 272 | while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
6eb87fed | 273 | table_end) { |
9b3fedde LA |
274 | if (max_entries && count >= max_entries) |
275 | break; | |
276 | ||
277 | for (i = 0; i < proc_num; i++) { | |
278 | if (entry->type != proc[i].id) | |
279 | continue; | |
362414d9 | 280 | if (!proc[i].handler || |
8726d4f4 AS |
281 | (!errs && proc[i].handler(entry, table_end))) { |
282 | errs++; | |
283 | continue; | |
284 | } | |
369d913b | 285 | |
fa162a05 | 286 | proc[i].count++; |
9b3fedde | 287 | break; |
4ceacd02 | 288 | } |
9b3fedde LA |
289 | if (i != proc_num) |
290 | count++; | |
4ceacd02 | 291 | |
369d913b FY |
292 | /* |
293 | * If entry->length is 0, break from this loop to avoid | |
294 | * infinite loop. | |
295 | */ | |
296 | if (entry->length == 0) { | |
9b3fedde | 297 | pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
f08bb472 | 298 | return -EINVAL; |
369d913b | 299 | } |
1da177e4 | 300 | |
5f3b1a8b | 301 | entry = (struct acpi_subtable_header *) |
4be44fcd | 302 | ((unsigned long)entry + entry->length); |
1da177e4 | 303 | } |
f08bb472 | 304 | |
1da177e4 | 305 | if (max_entries && count > max_entries) { |
99b0efd7 AS |
306 | pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", |
307 | id, proc->id, count); | |
1da177e4 LT |
308 | } |
309 | ||
8726d4f4 | 310 | return errs ? -EINVAL : count; |
f08bb472 AC |
311 | } |
312 | ||
9b3fedde LA |
313 | int __init |
314 | acpi_table_parse_entries_array(char *id, | |
f08bb472 | 315 | unsigned long table_size, |
9b3fedde | 316 | struct acpi_subtable_proc *proc, int proc_num, |
f08bb472 AC |
317 | unsigned int max_entries) |
318 | { | |
319 | struct acpi_table_header *table_header = NULL; | |
f08bb472 AC |
320 | int count; |
321 | u32 instance = 0; | |
322 | ||
323 | if (acpi_disabled) | |
324 | return -ENODEV; | |
325 | ||
9b3fedde | 326 | if (!id) |
f08bb472 AC |
327 | return -EINVAL; |
328 | ||
329 | if (!strncmp(id, ACPI_SIG_MADT, 4)) | |
330 | instance = acpi_apic_instance; | |
331 | ||
6b11d1d6 | 332 | acpi_get_table(id, instance, &table_header); |
f08bb472 AC |
333 | if (!table_header) { |
334 | pr_warn("%4.4s not present\n", id); | |
335 | return -ENODEV; | |
336 | } | |
337 | ||
9b3fedde LA |
338 | count = acpi_parse_entries_array(id, table_size, table_header, |
339 | proc, proc_num, max_entries); | |
f08bb472 | 340 | |
6b11d1d6 | 341 | acpi_put_table(table_header); |
f08bb472 | 342 | return count; |
1da177e4 LT |
343 | } |
344 | ||
9b3fedde LA |
345 | int __init |
346 | acpi_table_parse_entries(char *id, | |
347 | unsigned long table_size, | |
348 | int entry_id, | |
349 | acpi_tbl_entry_handler handler, | |
350 | unsigned int max_entries) | |
351 | { | |
352 | struct acpi_subtable_proc proc = { | |
353 | .id = entry_id, | |
354 | .handler = handler, | |
355 | }; | |
356 | ||
357 | return acpi_table_parse_entries_array(id, table_size, &proc, 1, | |
358 | max_entries); | |
359 | } | |
360 | ||
1da177e4 | 361 | int __init |
5f3b1a8b | 362 | acpi_table_parse_madt(enum acpi_madt_type id, |
b43e1065 | 363 | acpi_tbl_entry_handler handler, unsigned int max_entries) |
1da177e4 | 364 | { |
6eb87fed | 365 | return acpi_table_parse_entries(ACPI_SIG_MADT, |
4be44fcd LB |
366 | sizeof(struct acpi_table_madt), id, |
367 | handler, max_entries); | |
1da177e4 LT |
368 | } |
369 | ||
7f8f97c3 LB |
370 | /** |
371 | * acpi_table_parse - find table with @id, run @handler on it | |
7f8f97c3 LB |
372 | * @id: table id to find |
373 | * @handler: handler to run | |
374 | * | |
375 | * Scan the ACPI System Descriptor Table (STD) for a table matching @id, | |
f8a571b2 | 376 | * run @handler on it. |
377 | * | |
378 | * Return 0 if table found, -errno if not. | |
7f8f97c3 | 379 | */ |
b43e1065 | 380 | int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
1da177e4 | 381 | { |
ceb6c468 | 382 | struct acpi_table_header *table = NULL; |
a1fdcc0d | 383 | |
68ca4069 | 384 | if (acpi_disabled) |
e5b8fc6a LB |
385 | return -ENODEV; |
386 | ||
de2d1a7e | 387 | if (!id || !handler) |
1da177e4 LT |
388 | return -EINVAL; |
389 | ||
a1fdcc0d | 390 | if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
6b11d1d6 | 391 | acpi_get_table(id, acpi_apic_instance, &table); |
a1fdcc0d | 392 | else |
6b11d1d6 | 393 | acpi_get_table(id, 0, &table); |
a1fdcc0d | 394 | |
ceb6c468 AS |
395 | if (table) { |
396 | handler(table); | |
6b11d1d6 | 397 | acpi_put_table(table); |
ceb6c468 | 398 | return 0; |
7f8f97c3 | 399 | } else |
95df812d | 400 | return -ENODEV; |
1da177e4 LT |
401 | } |
402 | ||
a1fdcc0d LB |
403 | /* |
404 | * The BIOS is supposed to supply a single APIC/MADT, | |
405 | * but some report two. Provide a knob to use either. | |
406 | * (don't you wish instance 0 and 1 were not the same?) | |
407 | */ | |
408 | static void __init check_multiple_madt(void) | |
409 | { | |
410 | struct acpi_table_header *table = NULL; | |
411 | ||
6b11d1d6 | 412 | acpi_get_table(ACPI_SIG_MADT, 2, &table); |
a1fdcc0d | 413 | if (table) { |
730bf5eb HG |
414 | pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
415 | acpi_apic_instance); | |
416 | pr_warn("If \"acpi_apic_instance=%d\" works better, " | |
417 | "notify linux-acpi@vger.kernel.org\n", | |
418 | acpi_apic_instance ? 0 : 2); | |
6b11d1d6 | 419 | acpi_put_table(table); |
a1fdcc0d LB |
420 | |
421 | } else | |
422 | acpi_apic_instance = 0; | |
423 | ||
424 | return; | |
425 | } | |
426 | ||
5ae74f2c LZ |
427 | static void acpi_table_taint(struct acpi_table_header *table) |
428 | { | |
429 | pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
430 | table->signature, table->oem_table_id); | |
431 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); | |
432 | } | |
433 | ||
5d881327 | 434 | #ifdef CONFIG_ACPI_TABLE_UPGRADE |
5ae74f2c LZ |
435 | static u64 acpi_tables_addr; |
436 | static int all_tables_size; | |
437 | ||
438 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
439 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
440 | { | |
441 | u8 sum = 0; | |
442 | u8 *end = buffer + length; | |
443 | ||
444 | while (buffer < end) | |
445 | sum = (u8) (sum + *(buffer++)); | |
446 | return sum; | |
447 | } | |
448 | ||
449 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
450 | static const char * const table_sigs[] = { | |
451 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
452 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
453 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
454 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
455 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
456 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
457 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
458 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
459 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
460 | ||
461 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) | |
462 | ||
5d881327 LZ |
463 | #define NR_ACPI_INITRD_TABLES 64 |
464 | static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES]; | |
465 | static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES); | |
5ae74f2c LZ |
466 | |
467 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
468 | ||
da3d3f98 | 469 | void __init acpi_table_upgrade(void) |
5ae74f2c | 470 | { |
da3d3f98 AM |
471 | void *data = (void *)initrd_start; |
472 | size_t size = initrd_end - initrd_start; | |
5ae74f2c LZ |
473 | int sig, no, table_nr = 0, total_offset = 0; |
474 | long offset = 0; | |
475 | struct acpi_table_header *table; | |
476 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
477 | struct cpio_data file; | |
478 | ||
479 | if (data == NULL || size == 0) | |
480 | return; | |
481 | ||
5d881327 | 482 | for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) { |
5ae74f2c LZ |
483 | file = find_cpio_data(cpio_path, data, size, &offset); |
484 | if (!file.data) | |
485 | break; | |
486 | ||
487 | data += offset; | |
488 | size -= offset; | |
489 | ||
490 | if (file.size < sizeof(struct acpi_table_header)) { | |
491 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
492 | cpio_path, file.name); | |
493 | continue; | |
494 | } | |
495 | ||
496 | table = file.data; | |
497 | ||
498 | for (sig = 0; table_sigs[sig]; sig++) | |
499 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
500 | break; | |
501 | ||
502 | if (!table_sigs[sig]) { | |
503 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
504 | cpio_path, file.name); | |
505 | continue; | |
506 | } | |
507 | if (file.size != table->length) { | |
508 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
509 | cpio_path, file.name); | |
510 | continue; | |
511 | } | |
512 | if (acpi_table_checksum(file.data, table->length)) { | |
513 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
514 | cpio_path, file.name); | |
515 | continue; | |
516 | } | |
517 | ||
518 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
519 | table->signature, cpio_path, file.name, table->length); | |
520 | ||
521 | all_tables_size += table->length; | |
522 | acpi_initrd_files[table_nr].data = file.data; | |
523 | acpi_initrd_files[table_nr].size = file.size; | |
524 | table_nr++; | |
525 | } | |
526 | if (table_nr == 0) | |
527 | return; | |
528 | ||
529 | acpi_tables_addr = | |
84b06ca3 | 530 | memblock_find_in_range(0, ACPI_TABLE_UPGRADE_MAX_PHYS, |
5ae74f2c LZ |
531 | all_tables_size, PAGE_SIZE); |
532 | if (!acpi_tables_addr) { | |
533 | WARN_ON(1); | |
534 | return; | |
535 | } | |
536 | /* | |
537 | * Only calling e820_add_reserve does not work and the | |
538 | * tables are invalid (memory got used) later. | |
539 | * memblock_reserve works as expected and the tables won't get modified. | |
540 | * But it's not enough on X86 because ioremap will | |
541 | * complain later (used by acpi_os_map_memory) that the pages | |
542 | * that should get mapped are not marked "reserved". | |
ab6bc04c | 543 | * Both memblock_reserve and e820__range_add (via arch_reserve_mem_area) |
5ae74f2c LZ |
544 | * works fine. |
545 | */ | |
546 | memblock_reserve(acpi_tables_addr, all_tables_size); | |
547 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); | |
548 | ||
549 | /* | |
550 | * early_ioremap only can remap 256k one time. If we map all | |
551 | * tables one time, we will hit the limit. Need to map chunks | |
552 | * one by one during copying the same as that in relocate_initrd(). | |
553 | */ | |
554 | for (no = 0; no < table_nr; no++) { | |
555 | unsigned char *src_p = acpi_initrd_files[no].data; | |
556 | phys_addr_t size = acpi_initrd_files[no].size; | |
557 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
558 | phys_addr_t slop, clen; | |
559 | char *dest_p; | |
560 | ||
561 | total_offset += size; | |
562 | ||
563 | while (size) { | |
564 | slop = dest_addr & ~PAGE_MASK; | |
565 | clen = size; | |
566 | if (clen > MAP_CHUNK_SIZE - slop) | |
567 | clen = MAP_CHUNK_SIZE - slop; | |
ce0c1fcc AM |
568 | dest_p = early_memremap(dest_addr & PAGE_MASK, |
569 | clen + slop); | |
5ae74f2c | 570 | memcpy(dest_p + slop, src_p, clen); |
ce0c1fcc | 571 | early_memunmap(dest_p, clen + slop); |
5ae74f2c LZ |
572 | src_p += clen; |
573 | dest_addr += clen; | |
574 | size -= clen; | |
575 | } | |
576 | } | |
577 | } | |
578 | ||
579 | static acpi_status | |
580 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
581 | acpi_physical_address *address, u32 *length) | |
582 | { | |
583 | int table_offset = 0; | |
584 | int table_index = 0; | |
585 | struct acpi_table_header *table; | |
586 | u32 table_length; | |
587 | ||
588 | *length = 0; | |
589 | *address = 0; | |
590 | if (!acpi_tables_addr) | |
591 | return AE_OK; | |
592 | ||
593 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
594 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
595 | ACPI_HEADER_SIZE); | |
596 | if (table_offset + table->length > all_tables_size) { | |
597 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
598 | WARN_ON(1); | |
599 | return AE_OK; | |
600 | } | |
601 | ||
602 | table_length = table->length; | |
603 | ||
604 | /* Only override tables matched */ | |
5d881327 LZ |
605 | if (memcmp(existing_table->signature, table->signature, 4) || |
606 | memcmp(table->oem_id, existing_table->oem_id, | |
607 | ACPI_OEM_ID_SIZE) || | |
5ae74f2c LZ |
608 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
609 | ACPI_OEM_TABLE_ID_SIZE)) { | |
610 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
611 | goto next_table; | |
612 | } | |
5d881327 LZ |
613 | /* |
614 | * Mark the table to avoid being used in | |
615 | * acpi_table_initrd_scan() and check the revision. | |
616 | */ | |
617 | if (test_and_set_bit(table_index, acpi_initrd_installed) || | |
618 | existing_table->oem_revision >= table->oem_revision) { | |
619 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
620 | goto next_table; | |
621 | } | |
5ae74f2c LZ |
622 | |
623 | *length = table_length; | |
624 | *address = acpi_tables_addr + table_offset; | |
5d881327 LZ |
625 | pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n", |
626 | table->signature, table->oem_id, | |
627 | table->oem_table_id); | |
5ae74f2c | 628 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
5ae74f2c LZ |
629 | break; |
630 | ||
631 | next_table: | |
632 | table_offset += table_length; | |
633 | table_index++; | |
634 | } | |
635 | return AE_OK; | |
636 | } | |
637 | ||
638 | static void __init acpi_table_initrd_scan(void) | |
639 | { | |
640 | int table_offset = 0; | |
641 | int table_index = 0; | |
642 | u32 table_length; | |
643 | struct acpi_table_header *table; | |
644 | ||
645 | if (!acpi_tables_addr) | |
646 | return; | |
647 | ||
648 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
649 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
650 | ACPI_HEADER_SIZE); | |
651 | if (table_offset + table->length > all_tables_size) { | |
652 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
653 | WARN_ON(1); | |
654 | return; | |
655 | } | |
656 | ||
657 | table_length = table->length; | |
658 | ||
659 | /* Skip RSDT/XSDT which should only be used for override */ | |
5d881327 | 660 | if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) || |
5ae74f2c LZ |
661 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) { |
662 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
663 | goto next_table; | |
664 | } | |
5d881327 LZ |
665 | /* |
666 | * Mark the table to avoid being used in | |
667 | * acpi_table_initrd_override(). Though this is not possible | |
668 | * because override is disabled in acpi_install_table(). | |
669 | */ | |
670 | if (test_and_set_bit(table_index, acpi_initrd_installed)) { | |
671 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
672 | goto next_table; | |
673 | } | |
5ae74f2c | 674 | |
5d881327 LZ |
675 | pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n", |
676 | table->signature, table->oem_id, | |
677 | table->oem_table_id); | |
5ae74f2c LZ |
678 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
679 | acpi_install_table(acpi_tables_addr + table_offset, TRUE); | |
5ae74f2c LZ |
680 | next_table: |
681 | table_offset += table_length; | |
682 | table_index++; | |
683 | } | |
684 | } | |
685 | #else | |
5ae74f2c LZ |
686 | static acpi_status |
687 | acpi_table_initrd_override(struct acpi_table_header *existing_table, | |
688 | acpi_physical_address *address, | |
689 | u32 *table_length) | |
690 | { | |
691 | *table_length = 0; | |
692 | *address = 0; | |
693 | return AE_OK; | |
694 | } | |
695 | ||
696 | static void __init acpi_table_initrd_scan(void) | |
697 | { | |
698 | } | |
5d881327 | 699 | #endif /* CONFIG_ACPI_TABLE_UPGRADE */ |
5ae74f2c LZ |
700 | |
701 | acpi_status | |
702 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
703 | acpi_physical_address *address, | |
704 | u32 *table_length) | |
705 | { | |
706 | return acpi_table_initrd_override(existing_table, address, | |
707 | table_length); | |
708 | } | |
709 | ||
710 | acpi_status | |
711 | acpi_os_table_override(struct acpi_table_header *existing_table, | |
712 | struct acpi_table_header **new_table) | |
713 | { | |
714 | if (!existing_table || !new_table) | |
715 | return AE_BAD_PARAMETER; | |
716 | ||
717 | *new_table = NULL; | |
718 | ||
719 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
720 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
721 | *new_table = (struct acpi_table_header *)AmlCode; | |
722 | #endif | |
723 | if (*new_table != NULL) | |
724 | acpi_table_taint(existing_table); | |
725 | return AE_OK; | |
726 | } | |
727 | ||
1da177e4 LT |
728 | /* |
729 | * acpi_table_init() | |
730 | * | |
731 | * find RSDP, find and checksum SDT/XSDT. | |
732 | * checksum all tables, print SDT/XSDT | |
5f3b1a8b | 733 | * |
1da177e4 LT |
734 | * result: sdt_entry[] is initialized |
735 | */ | |
736 | ||
4be44fcd | 737 | int __init acpi_table_init(void) |
1da177e4 | 738 | { |
9e3a9d1e LB |
739 | acpi_status status; |
740 | ||
4fc0a7e8 LZ |
741 | if (acpi_verify_table_checksum) { |
742 | pr_info("Early table checksum verification enabled\n"); | |
023e2ee1 | 743 | acpi_gbl_enable_table_validation = TRUE; |
4fc0a7e8 LZ |
744 | } else { |
745 | pr_info("Early table checksum verification disabled\n"); | |
023e2ee1 | 746 | acpi_gbl_enable_table_validation = FALSE; |
4fc0a7e8 LZ |
747 | } |
748 | ||
9e3a9d1e LB |
749 | status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
750 | if (ACPI_FAILURE(status)) | |
95df812d | 751 | return -EINVAL; |
5ae74f2c | 752 | acpi_table_initrd_scan(); |
9e3a9d1e | 753 | |
a1fdcc0d LB |
754 | check_multiple_madt(); |
755 | return 0; | |
756 | } | |
757 | ||
758 | static int __init acpi_parse_apic_instance(char *str) | |
759 | { | |
f0df2d6b CG |
760 | if (!str) |
761 | return -EINVAL; | |
a1fdcc0d | 762 | |
3d915894 CJ |
763 | if (kstrtoint(str, 0, &acpi_apic_instance)) |
764 | return -EINVAL; | |
a1fdcc0d | 765 | |
730bf5eb | 766 | pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
a1fdcc0d | 767 | |
1da177e4 LT |
768 | return 0; |
769 | } | |
a1fdcc0d LB |
770 | |
771 | early_param("acpi_apic_instance", acpi_parse_apic_instance); | |
4fc0a7e8 LZ |
772 | |
773 | static int __init acpi_force_table_verification_setup(char *s) | |
774 | { | |
775 | acpi_verify_table_checksum = true; | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
780 | early_param("acpi_force_table_verification", acpi_force_table_verification_setup); | |
b2ca5dae CIK |
781 | |
782 | static int __init acpi_force_32bit_fadt_addr(char *s) | |
783 | { | |
784 | pr_info("Forcing 32 Bit FADT addresses\n"); | |
785 | acpi_gbl_use32_bit_fadt_addresses = TRUE; | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |