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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
f3d2e786 | 3 | * Module Name: tbutils - table utilities |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/actables.h> | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 48 | ACPI_MODULE_NAME("tbutils") |
1da177e4 | 49 | |
44f6c012 | 50 | /* Local prototypes */ |
c5fc42ac BM |
51 | static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags); |
52 | ||
53 | static void acpi_tb_convert_fadt(void); | |
54 | ||
55 | static void | |
56 | acpi_tb_install_table(acpi_physical_address address, | |
57 | u8 flags, char *signature, acpi_native_uint table_index); | |
f3d2e786 BM |
58 | |
59 | static void inline | |
60 | acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, | |
c5fc42ac BM |
61 | u8 bit_width, u64 address); |
62 | ||
a4bbb810 BM |
63 | static acpi_physical_address |
64 | acpi_tb_get_root_table_entry(u8 * table_entry, | |
65 | acpi_native_uint table_entry_size); | |
66 | ||
c5fc42ac BM |
67 | /* Table used for conversion of FADT to common format */ |
68 | ||
69 | typedef struct acpi_fadt_conversion { | |
70 | u8 target; | |
71 | u8 source; | |
72 | u8 length; | |
73 | ||
74 | } acpi_fadt_conversion; | |
75 | ||
76 | static struct acpi_fadt_conversion fadt_conversion_table[] = { | |
77 | {ACPI_FADT_OFFSET(xpm1a_event_block), | |
78 | ACPI_FADT_OFFSET(pm1a_event_block), | |
79 | ACPI_FADT_OFFSET(pm1_event_length)}, | |
80 | {ACPI_FADT_OFFSET(xpm1b_event_block), | |
81 | ACPI_FADT_OFFSET(pm1b_event_block), | |
82 | ACPI_FADT_OFFSET(pm1_event_length)}, | |
83 | {ACPI_FADT_OFFSET(xpm1a_control_block), | |
84 | ACPI_FADT_OFFSET(pm1a_control_block), | |
85 | ACPI_FADT_OFFSET(pm1_control_length)}, | |
86 | {ACPI_FADT_OFFSET(xpm1b_control_block), | |
87 | ACPI_FADT_OFFSET(pm1b_control_block), | |
88 | ACPI_FADT_OFFSET(pm1_control_length)}, | |
89 | {ACPI_FADT_OFFSET(xpm2_control_block), | |
90 | ACPI_FADT_OFFSET(pm2_control_block), | |
91 | ACPI_FADT_OFFSET(pm2_control_length)}, | |
92 | {ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block), | |
93 | ACPI_FADT_OFFSET(pm_timer_length)}, | |
94 | {ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block), | |
95 | ACPI_FADT_OFFSET(gpe0_block_length)}, | |
96 | {ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block), | |
97 | ACPI_FADT_OFFSET(gpe1_block_length)} | |
98 | }; | |
99 | ||
100 | #define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion)) | |
1da177e4 | 101 | |
0c9938cc RM |
102 | /******************************************************************************* |
103 | * | |
f3d2e786 | 104 | * FUNCTION: acpi_tb_print_table_header |
0c9938cc | 105 | * |
f3d2e786 BM |
106 | * PARAMETERS: Address - Table physical address |
107 | * Header - Table header | |
0c9938cc | 108 | * |
f3d2e786 | 109 | * RETURN: None |
0c9938cc | 110 | * |
c5fc42ac | 111 | * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. |
0c9938cc RM |
112 | * |
113 | ******************************************************************************/ | |
114 | ||
f3d2e786 BM |
115 | void |
116 | acpi_tb_print_table_header(acpi_physical_address address, | |
117 | struct acpi_table_header *header) | |
0c9938cc | 118 | { |
0c9938cc | 119 | |
c5fc42ac BM |
120 | if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { |
121 | ||
122 | /* FACS only has signature and length fields of common table header */ | |
123 | ||
124 | ACPI_INFO((AE_INFO, "%4.4s @ 0x%p/0x%04X", | |
125 | header->signature, ACPI_CAST_PTR(void, address), | |
126 | header->length)); | |
127 | } else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) { | |
128 | ||
129 | /* RSDP has no common fields */ | |
130 | ||
131 | ACPI_INFO((AE_INFO, "RSDP @ 0x%p/0x%04X (v%3.3d %6.6s)", | |
132 | ACPI_CAST_PTR(void, address), | |
a4bbb810 BM |
133 | (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> |
134 | revision > | |
135 | 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, | |
136 | header)->length : 20, | |
137 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
138 | header)->revision, | |
139 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
140 | header)->oem_id)); | |
c5fc42ac | 141 | } else { |
4bf27393 BM |
142 | /* Standard ACPI table with full common header */ |
143 | ||
c5fc42ac BM |
144 | ACPI_INFO((AE_INFO, |
145 | "%4.4s @ 0x%p/0x%04X (v%3.3d %6.6s %8.8s 0x%08X %4.4s 0x%08X)", | |
146 | header->signature, ACPI_CAST_PTR(void, address), | |
147 | header->length, header->revision, header->oem_id, | |
148 | header->oem_table_id, header->oem_revision, | |
149 | header->asl_compiler_id, | |
150 | header->asl_compiler_revision)); | |
151 | } | |
0c9938cc RM |
152 | } |
153 | ||
1da177e4 LT |
154 | /******************************************************************************* |
155 | * | |
f3d2e786 | 156 | * FUNCTION: acpi_tb_init_generic_address |
1da177e4 | 157 | * |
f3d2e786 BM |
158 | * PARAMETERS: new_gas_struct - GAS struct to be initialized |
159 | * bit_width - Width of this register | |
160 | * Address - Address of the register | |
1da177e4 | 161 | * |
f3d2e786 | 162 | * RETURN: None |
1da177e4 | 163 | * |
f3d2e786 | 164 | * DESCRIPTION: Initialize a GAS structure. |
1da177e4 LT |
165 | * |
166 | ******************************************************************************/ | |
167 | ||
f3d2e786 BM |
168 | static void inline |
169 | acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, | |
c5fc42ac | 170 | u8 bit_width, u64 address) |
1da177e4 | 171 | { |
44f6c012 | 172 | |
4bf27393 | 173 | ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address); |
f3d2e786 BM |
174 | new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
175 | new_gas_struct->bit_width = bit_width; | |
176 | new_gas_struct->bit_offset = 0; | |
177 | new_gas_struct->access_width = 0; | |
1da177e4 LT |
178 | } |
179 | ||
c5fc42ac BM |
180 | /******************************************************************************* |
181 | * | |
182 | * FUNCTION: acpi_tb_validate_checksum | |
183 | * | |
184 | * PARAMETERS: Table - ACPI table to verify | |
185 | * Length - Length of entire table | |
186 | * | |
187 | * RETURN: Status | |
188 | * | |
189 | * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns | |
190 | * exception on bad checksum. | |
191 | * | |
192 | ******************************************************************************/ | |
193 | ||
194 | acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) | |
195 | { | |
196 | u8 checksum; | |
197 | ||
198 | /* Compute the checksum on the table */ | |
199 | ||
200 | checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); | |
201 | ||
202 | /* Checksum ok? (should be zero) */ | |
203 | ||
204 | if (checksum) { | |
205 | ACPI_WARNING((AE_INFO, | |
206 | "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X", | |
207 | table->signature, table->checksum, | |
208 | (u8) (table->checksum - checksum))); | |
209 | ||
210 | #if (ACPI_CHECKSUM_ABORT) | |
211 | ||
212 | return (AE_BAD_CHECKSUM); | |
213 | #endif | |
214 | } | |
215 | ||
216 | return (AE_OK); | |
217 | } | |
218 | ||
1da177e4 LT |
219 | /******************************************************************************* |
220 | * | |
f3d2e786 | 221 | * FUNCTION: acpi_tb_checksum |
1da177e4 | 222 | * |
f3d2e786 BM |
223 | * PARAMETERS: Buffer - Pointer to memory region to be checked |
224 | * Length - Length of this memory region | |
1da177e4 | 225 | * |
f3d2e786 | 226 | * RETURN: Checksum (u8) |
1da177e4 | 227 | * |
f3d2e786 | 228 | * DESCRIPTION: Calculates circular checksum of memory region. |
1da177e4 LT |
229 | * |
230 | ******************************************************************************/ | |
231 | ||
f3d2e786 | 232 | u8 acpi_tb_checksum(u8 * buffer, acpi_native_uint length) |
793c2388 | 233 | { |
793c2388 | 234 | u8 sum = 0; |
f3d2e786 | 235 | u8 *end = buffer + length; |
793c2388 | 236 | |
f3d2e786 BM |
237 | while (buffer < end) { |
238 | sum = (u8) (sum + *(buffer++)); | |
793c2388 BM |
239 | } |
240 | ||
f3d2e786 | 241 | return sum; |
793c2388 BM |
242 | } |
243 | ||
244 | /******************************************************************************* | |
245 | * | |
f3d2e786 | 246 | * FUNCTION: acpi_tb_convert_fadt |
793c2388 | 247 | * |
c5fc42ac | 248 | * PARAMETERS: None, uses acpi_gbl_FADT |
793c2388 | 249 | * |
f3d2e786 | 250 | * RETURN: None |
793c2388 | 251 | * |
c5fc42ac BM |
252 | * DESCRIPTION: Converts all versions of the FADT to a common internal format. |
253 | * | |
254 | * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must contain | |
255 | * a copy of the actual FADT. | |
256 | * | |
257 | * ACPICA will use the "X" fields of the FADT for all addresses. | |
258 | * | |
259 | * "X" fields are optional extensions to the original V1.0 fields. Even if | |
260 | * they are present in the structure, they can be optionally not used by | |
261 | * setting them to zero. Therefore, we must selectively expand V1.0 fields | |
262 | * if the corresponding X field is zero. | |
263 | * | |
264 | * For ACPI 1.0 FADTs, all address fields are expanded to the corresponding | |
265 | * "X" fields. | |
266 | * | |
267 | * For ACPI 2.0 FADTs, any "X" fields that are NULL are filled in by | |
268 | * expanding the corresponding ACPI 1.0 field. | |
793c2388 BM |
269 | * |
270 | ******************************************************************************/ | |
271 | ||
c5fc42ac | 272 | static void acpi_tb_convert_fadt(void) |
1da177e4 | 273 | { |
c5fc42ac BM |
274 | u8 pm1_register_length; |
275 | struct acpi_generic_address *target; | |
276 | acpi_native_uint i; | |
277 | ||
278 | /* Expand the FACS and DSDT addresses as necessary */ | |
1da177e4 | 279 | |
f3d2e786 BM |
280 | if (!acpi_gbl_FADT.Xfacs) { |
281 | acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; | |
282 | } | |
1da177e4 | 283 | |
f3d2e786 BM |
284 | if (!acpi_gbl_FADT.Xdsdt) { |
285 | acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; | |
286 | } | |
1da177e4 | 287 | |
f3d2e786 | 288 | /* |
a4bbb810 BM |
289 | * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address |
290 | * structures as necessary. | |
f3d2e786 | 291 | */ |
c5fc42ac BM |
292 | for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) { |
293 | target = | |
294 | ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, | |
295 | fadt_conversion_table[i].target); | |
296 | ||
4bf27393 BM |
297 | /* Expand only if the X target is null */ |
298 | ||
c5fc42ac BM |
299 | if (!target->address) { |
300 | acpi_tb_init_generic_address(target, | |
301 | *ACPI_ADD_PTR(u8, | |
302 | &acpi_gbl_FADT, | |
303 | fadt_conversion_table | |
304 | [i].length), | |
a4bbb810 BM |
305 | (u64) * ACPI_ADD_PTR(u32, |
306 | &acpi_gbl_FADT, | |
307 | fadt_conversion_table | |
308 | [i]. | |
309 | source)); | |
c5fc42ac BM |
310 | } |
311 | } | |
f3d2e786 BM |
312 | |
313 | /* | |
c5fc42ac BM |
314 | * Calculate separate GAS structs for the PM1 Enable registers. |
315 | * These addresses do not appear (directly) in the FADT, so it is | |
316 | * useful to calculate them once, here. | |
4bf27393 BM |
317 | * |
318 | * The PM event blocks are split into two register blocks, first is the | |
319 | * PM Status Register block, followed immediately by the PM Enable Register | |
320 | * block. Each is of length (pm1_event_length/2) | |
f3d2e786 | 321 | */ |
c5fc42ac BM |
322 | pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length); |
323 | ||
324 | /* PM1A is required */ | |
325 | ||
f3d2e786 | 326 | acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable, |
c5fc42ac | 327 | pm1_register_length, |
4bf27393 BM |
328 | (acpi_gbl_FADT.xpm1a_event_block.address + |
329 | pm1_register_length)); | |
c5fc42ac BM |
330 | |
331 | /* PM1B is optional; leave null if not present */ | |
f3d2e786 | 332 | |
f3d2e786 BM |
333 | if (acpi_gbl_FADT.xpm1b_event_block.address) { |
334 | acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable, | |
c5fc42ac | 335 | pm1_register_length, |
4bf27393 BM |
336 | (acpi_gbl_FADT.xpm1b_event_block. |
337 | address + pm1_register_length)); | |
f3d2e786 | 338 | } |
1da177e4 | 339 | |
f3d2e786 | 340 | /* Global FADT is the new common V2.0 FADT */ |
1da177e4 | 341 | |
f3d2e786 | 342 | acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); |
1da177e4 LT |
343 | } |
344 | ||
1da177e4 LT |
345 | /******************************************************************************* |
346 | * | |
c5fc42ac | 347 | * FUNCTION: acpi_tb_install_table |
1da177e4 | 348 | * |
c5fc42ac BM |
349 | * PARAMETERS: Address - Physical address of DSDT or FACS |
350 | * Flags - Flags | |
351 | * Signature - Table signature, NULL if no need to | |
352 | * match | |
353 | * table_index - Index into root table array | |
1da177e4 | 354 | * |
c5fc42ac | 355 | * RETURN: None |
1da177e4 | 356 | * |
c5fc42ac | 357 | * DESCRIPTION: Install an ACPI table into the global data structure. |
1da177e4 LT |
358 | * |
359 | ******************************************************************************/ | |
360 | ||
c5fc42ac BM |
361 | static void |
362 | acpi_tb_install_table(acpi_physical_address address, | |
363 | u8 flags, char *signature, acpi_native_uint table_index) | |
1da177e4 | 364 | { |
f3d2e786 BM |
365 | struct acpi_table_header *table; |
366 | ||
c5fc42ac BM |
367 | if (!address) { |
368 | ACPI_ERROR((AE_INFO, | |
369 | "Null physical address for ACPI table [%s]", | |
370 | signature)); | |
371 | return; | |
f3d2e786 BM |
372 | } |
373 | ||
c5fc42ac BM |
374 | /* Map just the table header */ |
375 | ||
376 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); | |
f3d2e786 | 377 | if (!table) { |
c5fc42ac BM |
378 | return; |
379 | } | |
380 | ||
381 | /* If a particular signature is expected, signature must match */ | |
382 | ||
383 | if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) { | |
384 | ACPI_ERROR((AE_INFO, | |
385 | "Invalid signature 0x%X for ACPI table [%s]", | |
386 | *ACPI_CAST_PTR(u32, table->signature), signature)); | |
387 | goto unmap_and_exit; | |
f3d2e786 BM |
388 | } |
389 | ||
c5fc42ac BM |
390 | /* Initialize the table entry */ |
391 | ||
392 | acpi_gbl_root_table_list.tables[table_index].address = address; | |
393 | acpi_gbl_root_table_list.tables[table_index].length = table->length; | |
394 | acpi_gbl_root_table_list.tables[table_index].flags = flags; | |
f3d2e786 BM |
395 | |
396 | ACPI_MOVE_32_TO_32(& | |
c5fc42ac BM |
397 | (acpi_gbl_root_table_list.tables[table_index]. |
398 | signature), table->signature); | |
f3d2e786 | 399 | |
c5fc42ac | 400 | acpi_tb_print_table_header(address, table); |
f3d2e786 | 401 | |
c5fc42ac | 402 | if (table_index == ACPI_TABLE_INDEX_DSDT) { |
f3d2e786 | 403 | |
c5fc42ac | 404 | /* Global integer width is based upon revision of the DSDT */ |
f3d2e786 | 405 | |
c5fc42ac BM |
406 | acpi_ut_set_integer_width(table->revision); |
407 | } | |
408 | ||
409 | unmap_and_exit: | |
f3d2e786 | 410 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); |
c5fc42ac | 411 | } |
f3d2e786 | 412 | |
c5fc42ac BM |
413 | /******************************************************************************* |
414 | * | |
415 | * FUNCTION: acpi_tb_parse_fadt | |
416 | * | |
417 | * PARAMETERS: table_index - Index for the FADT | |
418 | * Flags - Flags | |
419 | * | |
420 | * RETURN: None | |
421 | * | |
422 | * DESCRIPTION: Initialize the FADT, DSDT and FACS tables | |
423 | * (FADT contains the addresses of the DSDT and FACS) | |
424 | * | |
425 | ******************************************************************************/ | |
426 | ||
427 | static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) | |
428 | { | |
429 | u32 length; | |
430 | struct acpi_table_header *table; | |
431 | ||
432 | /* | |
433 | * Special case for the FADT because of multiple versions and the fact | |
434 | * that it contains pointers to both the DSDT and FACS tables. | |
435 | * | |
436 | * Get a local copy of the FADT and convert it to a common format | |
437 | * Map entire FADT, assumed to be smaller than one page. | |
438 | */ | |
439 | length = acpi_gbl_root_table_list.tables[table_index].length; | |
1da177e4 | 440 | |
f3d2e786 | 441 | table = |
c5fc42ac BM |
442 | acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. |
443 | address, length); | |
f3d2e786 BM |
444 | if (!table) { |
445 | return; | |
446 | } | |
447 | ||
c5fc42ac BM |
448 | /* |
449 | * Validate the FADT checksum before we copy the table. Ignore | |
450 | * checksum error as we want to try to get the DSDT and FACS. | |
451 | */ | |
452 | (void)acpi_tb_verify_checksum(table, length); | |
f3d2e786 | 453 | |
c5fc42ac | 454 | /* Copy the entire FADT locally */ |
f3d2e786 | 455 | |
a4bbb810 | 456 | ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); |
f3d2e786 | 457 | |
c5fc42ac BM |
458 | ACPI_MEMCPY(&acpi_gbl_FADT, table, |
459 | ACPI_MIN(length, sizeof(struct acpi_table_fadt))); | |
460 | acpi_os_unmap_memory(table, length); | |
f3d2e786 | 461 | |
c5fc42ac BM |
462 | /* Convert local FADT to the common internal format */ |
463 | ||
464 | acpi_tb_convert_fadt(); | |
465 | ||
466 | /* Extract the DSDT and FACS tables from the FADT */ | |
467 | ||
468 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, | |
469 | flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); | |
470 | ||
471 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs, | |
472 | flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); | |
793c2388 BM |
473 | } |
474 | ||
a4bbb810 BM |
475 | /******************************************************************************* |
476 | * | |
477 | * FUNCTION: acpi_tb_get_root_table_entry | |
478 | * | |
479 | * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry | |
480 | * table_entry_size - sizeof 32 or 64 (RSDT or XSDT) | |
481 | * | |
482 | * RETURN: Physical address extracted from the root table | |
483 | * | |
484 | * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on | |
485 | * both 32-bit and 64-bit platforms | |
486 | * | |
487 | * NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on | |
488 | * 64-bit platforms. | |
489 | * | |
490 | ******************************************************************************/ | |
491 | ||
492 | static acpi_physical_address | |
493 | acpi_tb_get_root_table_entry(u8 * table_entry, | |
494 | acpi_native_uint table_entry_size) | |
495 | { | |
496 | u64 address64; | |
497 | ||
498 | /* | |
499 | * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): | |
500 | * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT | |
501 | */ | |
502 | if (table_entry_size == sizeof(u32)) { | |
503 | /* | |
504 | * 32-bit platform, RSDT: Return 32-bit table entry | |
505 | * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return | |
506 | */ | |
507 | return ((acpi_physical_address) | |
508 | (*ACPI_CAST_PTR(u32, table_entry))); | |
509 | } else { | |
510 | /* | |
511 | * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return | |
512 | * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, return 64-bit | |
513 | */ | |
514 | ACPI_MOVE_64_TO_64(&address64, table_entry); | |
515 | ||
516 | #if ACPI_MACHINE_WIDTH == 32 | |
517 | if (address64 > ACPI_UINT32_MAX) { | |
518 | ||
519 | /* Will truncate 64-bit address to 32 bits */ | |
520 | ||
521 | ACPI_WARNING((AE_INFO, | |
522 | "64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating", | |
523 | ACPI_FORMAT_UINT64(address64))); | |
524 | } | |
525 | #endif | |
526 | return ((acpi_physical_address) (address64)); | |
527 | } | |
528 | } | |
529 | ||
793c2388 BM |
530 | /******************************************************************************* |
531 | * | |
f3d2e786 | 532 | * FUNCTION: acpi_tb_parse_root_table |
793c2388 | 533 | * |
f3d2e786 BM |
534 | * PARAMETERS: Rsdp - Pointer to the RSDP |
535 | * Flags - Flags | |
536 | * | |
537 | * RETURN: Status | |
793c2388 | 538 | * |
f3d2e786 BM |
539 | * DESCRIPTION: This function is called to parse the Root System Description |
540 | * Table (RSDT or XSDT) | |
793c2388 | 541 | * |
f3d2e786 BM |
542 | * NOTE: Tables are mapped (not copied) for efficiency. The FACS must |
543 | * be mapped and cannot be copied because it contains the actual | |
544 | * memory location of the ACPI Global Lock. | |
793c2388 BM |
545 | * |
546 | ******************************************************************************/ | |
547 | ||
ad71860a | 548 | acpi_status __init |
c5fc42ac | 549 | acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) |
793c2388 | 550 | { |
c5fc42ac BM |
551 | struct acpi_table_rsdp *rsdp; |
552 | acpi_native_uint table_entry_size; | |
553 | acpi_native_uint i; | |
554 | u32 table_count; | |
f3d2e786 BM |
555 | struct acpi_table_header *table; |
556 | acpi_physical_address address; | |
557 | u32 length; | |
558 | u8 *table_entry; | |
f3d2e786 BM |
559 | acpi_status status; |
560 | ||
561 | ACPI_FUNCTION_TRACE(tb_parse_root_table); | |
562 | ||
c5fc42ac BM |
563 | /* |
564 | * Map the entire RSDP and extract the address of the RSDT or XSDT | |
565 | */ | |
566 | rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp)); | |
567 | if (!rsdp) { | |
568 | return_ACPI_STATUS(AE_NO_MEMORY); | |
569 | } | |
570 | ||
571 | acpi_tb_print_table_header(rsdp_address, | |
572 | ACPI_CAST_PTR(struct acpi_table_header, | |
573 | rsdp)); | |
574 | ||
f3d2e786 BM |
575 | /* Differentiate between RSDT and XSDT root tables */ |
576 | ||
577 | if (rsdp->revision > 1 && rsdp->xsdt_physical_address) { | |
578 | /* | |
579 | * Root table is an XSDT (64-bit physical addresses). We must use the | |
580 | * XSDT if the revision is > 1 and the XSDT pointer is present, as per | |
581 | * the ACPI specification. | |
582 | */ | |
c5fc42ac BM |
583 | address = (acpi_physical_address) rsdp->xsdt_physical_address; |
584 | table_entry_size = sizeof(u64); | |
f3d2e786 BM |
585 | } else { |
586 | /* Root table is an RSDT (32-bit physical addresses) */ | |
587 | ||
c5fc42ac BM |
588 | address = (acpi_physical_address) rsdp->rsdt_physical_address; |
589 | table_entry_size = sizeof(u32); | |
f3d2e786 | 590 | } |
793c2388 | 591 | |
c5fc42ac BM |
592 | /* |
593 | * It is not possible to map more than one entry in some environments, | |
594 | * so unmap the RSDP here before mapping other tables | |
595 | */ | |
596 | acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); | |
597 | ||
598 | /* Map the RSDT/XSDT table header to get the full table length */ | |
793c2388 | 599 | |
f3d2e786 BM |
600 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
601 | if (!table) { | |
c5fc42ac | 602 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
603 | } |
604 | ||
c5fc42ac BM |
605 | acpi_tb_print_table_header(address, table); |
606 | ||
f3d2e786 BM |
607 | /* Get the length of the full table, verify length and map entire table */ |
608 | ||
609 | length = table->length; | |
610 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
611 | ||
612 | if (length < sizeof(struct acpi_table_header)) { | |
613 | ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", | |
614 | length)); | |
c5fc42ac | 615 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
f3d2e786 BM |
616 | } |
617 | ||
618 | table = acpi_os_map_memory(address, length); | |
619 | if (!table) { | |
c5fc42ac | 620 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
621 | } |
622 | ||
623 | /* Validate the root table checksum */ | |
624 | ||
c5fc42ac BM |
625 | status = acpi_tb_verify_checksum(table, length); |
626 | if (ACPI_FAILURE(status)) { | |
f3d2e786 | 627 | acpi_os_unmap_memory(table, length); |
c5fc42ac | 628 | return_ACPI_STATUS(status); |
f3d2e786 | 629 | } |
f3d2e786 BM |
630 | |
631 | /* Calculate the number of tables described in the root table */ | |
632 | ||
633 | table_count = | |
a4bbb810 BM |
634 | (u32) ((table->length - |
635 | sizeof(struct acpi_table_header)) / table_entry_size); | |
52fc0b02 | 636 | |
c5fc42ac BM |
637 | /* |
638 | * First two entries in the table array are reserved for the DSDT and FACS, | |
639 | * which are not actually present in the RSDT/XSDT - they come from the FADT | |
640 | */ | |
f3d2e786 BM |
641 | table_entry = |
642 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
643 | acpi_gbl_root_table_list.count = 2; | |
1da177e4 | 644 | |
f3d2e786 | 645 | /* |
c5fc42ac | 646 | * Initialize the root table array from the RSDT/XSDT |
f3d2e786 | 647 | */ |
c5fc42ac | 648 | for (i = 0; i < table_count; i++) { |
f3d2e786 BM |
649 | if (acpi_gbl_root_table_list.count >= |
650 | acpi_gbl_root_table_list.size) { | |
c5fc42ac BM |
651 | |
652 | /* There is no more room in the root table array, attempt resize */ | |
653 | ||
f3d2e786 BM |
654 | status = acpi_tb_resize_root_table_list(); |
655 | if (ACPI_FAILURE(status)) { | |
656 | ACPI_WARNING((AE_INFO, | |
657 | "Truncating %u table entries!", | |
658 | (unsigned) | |
659 | (acpi_gbl_root_table_list.size - | |
660 | acpi_gbl_root_table_list. | |
661 | count))); | |
662 | break; | |
663 | } | |
664 | } | |
665 | ||
a4bbb810 BM |
666 | /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ |
667 | ||
668 | acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count]. | |
669 | address = | |
670 | acpi_tb_get_root_table_entry(table_entry, table_entry_size); | |
f3d2e786 | 671 | |
c5fc42ac | 672 | table_entry += table_entry_size; |
f3d2e786 | 673 | acpi_gbl_root_table_list.count++; |
1da177e4 | 674 | } |
793c2388 | 675 | |
f3d2e786 BM |
676 | /* |
677 | * It is not possible to map more than one entry in some environments, | |
678 | * so unmap the root table here before mapping other tables | |
679 | */ | |
680 | acpi_os_unmap_memory(table, length); | |
681 | ||
c5fc42ac BM |
682 | /* |
683 | * Complete the initialization of the root table array by examining | |
684 | * the header of each table | |
685 | */ | |
f3d2e786 | 686 | for (i = 2; i < acpi_gbl_root_table_list.count; i++) { |
c5fc42ac BM |
687 | acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. |
688 | address, flags, NULL, i); | |
f3d2e786 | 689 | |
c5fc42ac | 690 | /* Special case for FADT - get the DSDT and FACS */ |
f3d2e786 | 691 | |
c5fc42ac BM |
692 | if (ACPI_COMPARE_NAME |
693 | (&acpi_gbl_root_table_list.tables[i].signature, | |
694 | ACPI_SIG_FADT)) { | |
695 | acpi_tb_parse_fadt(i, flags); | |
f3d2e786 BM |
696 | } |
697 | } | |
698 | ||
699 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
700 | } |
701 | ||
f3d2e786 | 702 | /****************************************************************************** |
44f6c012 | 703 | * |
f3d2e786 | 704 | * FUNCTION: acpi_tb_map |
44f6c012 | 705 | * |
f3d2e786 BM |
706 | * PARAMETERS: Address - Address to be mapped |
707 | * Length - Length to be mapped | |
708 | * Flags - Logical or physical addressing mode | |
44f6c012 | 709 | * |
f3d2e786 | 710 | * RETURN: Pointer to mapped region |
44f6c012 | 711 | * |
f3d2e786 BM |
712 | * DESCRIPTION: Maps memory according to flag |
713 | * | |
714 | *****************************************************************************/ | |
44f6c012 | 715 | |
f3d2e786 | 716 | void *acpi_tb_map(acpi_physical_address address, u32 length, u32 flags) |
44f6c012 | 717 | { |
44f6c012 | 718 | |
f3d2e786 BM |
719 | if (flags == ACPI_TABLE_ORIGIN_MAPPED) { |
720 | return (acpi_os_map_memory(address, length)); | |
721 | } else { | |
722 | return (ACPI_CAST_PTR(void, address)); | |
723 | } | |
724 | } | |
44f6c012 | 725 | |
f3d2e786 BM |
726 | /****************************************************************************** |
727 | * | |
728 | * FUNCTION: acpi_tb_unmap | |
729 | * | |
730 | * PARAMETERS: Pointer - To mapped region | |
731 | * Length - Length to be unmapped | |
732 | * Flags - Logical or physical addressing mode | |
733 | * | |
734 | * RETURN: None | |
735 | * | |
736 | * DESCRIPTION: Unmaps memory according to flag | |
737 | * | |
738 | *****************************************************************************/ | |
44f6c012 | 739 | |
f3d2e786 BM |
740 | void acpi_tb_unmap(void *pointer, u32 length, u32 flags) |
741 | { | |
44f6c012 | 742 | |
f3d2e786 BM |
743 | if (flags == ACPI_TABLE_ORIGIN_MAPPED) { |
744 | acpi_os_unmap_memory(pointer, length); | |
745 | } | |
44f6c012 | 746 | } |