aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/tables/tbutils.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/tables/tbutils.c')
-rw-r--r--drivers/acpi/tables/tbutils.c238
1 files changed, 1 insertions, 237 deletions
diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c
index 6d13737f3f89..54e53e619e6b 100644
--- a/drivers/acpi/tables/tbutils.c
+++ b/drivers/acpi/tables/tbutils.c
@@ -48,57 +48,10 @@
48ACPI_MODULE_NAME("tbutils") 48ACPI_MODULE_NAME("tbutils")
49 49
50/* Local prototypes */ 50/* Local prototypes */
51static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags);
52
53static void acpi_tb_convert_fadt(void);
54
55static void
56acpi_tb_install_table(acpi_physical_address address,
57 u8 flags, char *signature, acpi_native_uint table_index);
58
59static void inline
60acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
61 u8 bit_width, u64 address);
62
63static acpi_physical_address 51static acpi_physical_address
64acpi_tb_get_root_table_entry(u8 * table_entry, 52acpi_tb_get_root_table_entry(u8 * table_entry,
65 acpi_native_uint table_entry_size); 53 acpi_native_uint table_entry_size);
66 54
67/* Table used for conversion of FADT to common format */
68
69typedef struct acpi_fadt_conversion {
70 u8 target;
71 u8 source;
72 u8 length;
73
74} acpi_fadt_conversion;
75
76static 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))
101
102/******************************************************************************* 55/*******************************************************************************
103 * 56 *
104 * FUNCTION: acpi_tb_print_table_header 57 * FUNCTION: acpi_tb_print_table_header
@@ -153,32 +106,6 @@ acpi_tb_print_table_header(acpi_physical_address address,
153 106
154/******************************************************************************* 107/*******************************************************************************
155 * 108 *
156 * FUNCTION: acpi_tb_init_generic_address
157 *
158 * PARAMETERS: new_gas_struct - GAS struct to be initialized
159 * bit_width - Width of this register
160 * Address - Address of the register
161 *
162 * RETURN: None
163 *
164 * DESCRIPTION: Initialize a GAS structure.
165 *
166 ******************************************************************************/
167
168static void inline
169acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
170 u8 bit_width, u64 address)
171{
172
173 ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address);
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;
178}
179
180/*******************************************************************************
181 *
182 * FUNCTION: acpi_tb_validate_checksum 109 * FUNCTION: acpi_tb_validate_checksum
183 * 110 *
184 * PARAMETERS: Table - ACPI table to verify 111 * PARAMETERS: Table - ACPI table to verify
@@ -243,107 +170,6 @@ u8 acpi_tb_checksum(u8 * buffer, acpi_native_uint length)
243 170
244/******************************************************************************* 171/*******************************************************************************
245 * 172 *
246 * FUNCTION: acpi_tb_convert_fadt
247 *
248 * PARAMETERS: None, uses acpi_gbl_FADT
249 *
250 * RETURN: None
251 *
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.
269 *
270 ******************************************************************************/
271
272static void acpi_tb_convert_fadt(void)
273{
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 */
279
280 if (!acpi_gbl_FADT.Xfacs) {
281 acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
282 }
283
284 if (!acpi_gbl_FADT.Xdsdt) {
285 acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
286 }
287
288 /*
289 * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address
290 * structures as necessary.
291 */
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
297 /* Expand only if the X target is null */
298
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),
305 (u64) * ACPI_ADD_PTR(u32,
306 &acpi_gbl_FADT,
307 fadt_conversion_table
308 [i].
309 source));
310 }
311 }
312
313 /*
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.
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)
321 */
322 pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
323
324 /* PM1A is required */
325
326 acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
327 pm1_register_length,
328 (acpi_gbl_FADT.xpm1a_event_block.address +
329 pm1_register_length));
330
331 /* PM1B is optional; leave null if not present */
332
333 if (acpi_gbl_FADT.xpm1b_event_block.address) {
334 acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
335 pm1_register_length,
336 (acpi_gbl_FADT.xpm1b_event_block.
337 address + pm1_register_length));
338 }
339
340 /* Global FADT is the new common V2.0 FADT */
341
342 acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
343}
344
345/*******************************************************************************
346 *
347 * FUNCTION: acpi_tb_install_table 173 * FUNCTION: acpi_tb_install_table
348 * 174 *
349 * PARAMETERS: Address - Physical address of DSDT or FACS 175 * PARAMETERS: Address - Physical address of DSDT or FACS
@@ -358,7 +184,7 @@ static void acpi_tb_convert_fadt(void)
358 * 184 *
359 ******************************************************************************/ 185 ******************************************************************************/
360 186
361static void 187void
362acpi_tb_install_table(acpi_physical_address address, 188acpi_tb_install_table(acpi_physical_address address,
363 u8 flags, char *signature, acpi_native_uint table_index) 189 u8 flags, char *signature, acpi_native_uint table_index)
364{ 190{
@@ -412,68 +238,6 @@ acpi_tb_install_table(acpi_physical_address address,
412 238
413/******************************************************************************* 239/*******************************************************************************
414 * 240 *
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
427static 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;
440
441 table =
442 acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
443 address, length);
444 if (!table) {
445 return;
446 }
447
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);
453
454 /* Copy the entire FADT locally */
455
456 ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
457
458 ACPI_MEMCPY(&acpi_gbl_FADT, table,
459 ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
460 acpi_os_unmap_memory(table, length);
461
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);
473}
474
475/*******************************************************************************
476 *
477 * FUNCTION: acpi_tb_get_root_table_entry 241 * FUNCTION: acpi_tb_get_root_table_entry
478 * 242 *
479 * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry 243 * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry