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authorBob Moore <robert.moore@intel.com>2007-02-02 11:48:20 -0500
committerLen Brown <len.brown@intel.com>2007-02-02 21:14:24 -0500
commit95befdb398e0112ede80529f6770644ecfa5a82e (patch)
treebad09c6432fc541b8cefd380a4ddffdae8e79179 /drivers/acpi/tables
parentb89b71a0019660d73e3c9671205c49e443d7085c (diff)
ACPICA: Create tbfadt.c to hold all FADT-related functions
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/tables')
-rw-r--r--drivers/acpi/tables/Makefile2
-rw-r--r--drivers/acpi/tables/tbfadt.c380
2 files changed, 381 insertions, 1 deletions
diff --git a/drivers/acpi/tables/Makefile b/drivers/acpi/tables/Makefile
index f08f1f310274..0a7d7afac255 100644
--- a/drivers/acpi/tables/Makefile
+++ b/drivers/acpi/tables/Makefile
@@ -2,6 +2,6 @@
2# Makefile for all Linux ACPI interpreter subdirectories 2# Makefile for all Linux ACPI interpreter subdirectories
3# 3#
4 4
5obj-y := tbxface.o tbinstal.o tbutils.o tbfind.o 5obj-y := tbxface.o tbinstal.o tbutils.o tbfind.o tbfadt.o
6 6
7EXTRA_CFLAGS += $(ACPI_CFLAGS) 7EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/tables/tbfadt.c b/drivers/acpi/tables/tbfadt.c
new file mode 100644
index 000000000000..2336a72fab40
--- /dev/null
+++ b/drivers/acpi/tables/tbfadt.c
@@ -0,0 +1,380 @@
1/******************************************************************************
2 *
3 * Module Name: tbfadt - FADT table utilities
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2006, R. Byron Moore
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
44#include <acpi/acpi.h>
45#include <acpi/actables.h>
46
47#define _COMPONENT ACPI_TABLES
48ACPI_MODULE_NAME("tbfadt")
49
50/* Local prototypes */
51static void inline
52acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
53 u8 bit_width, u64 address);
54
55static void acpi_tb_fadt_register_error(char *register_name, u32 value);
56
57static void acpi_tb_convert_fadt(void);
58
59static void acpi_tb_validate_fadt(void);
60
61/* Table used for conversion of FADT to common format */
62
63typedef struct acpi_fadt_conversion {
64 u8 target;
65 u8 source;
66 u8 length;
67
68} acpi_fadt_conversion;
69
70static struct acpi_fadt_conversion fadt_conversion_table[] = {
71 {ACPI_FADT_OFFSET(xpm1a_event_block),
72 ACPI_FADT_OFFSET(pm1a_event_block),
73 ACPI_FADT_OFFSET(pm1_event_length)},
74 {ACPI_FADT_OFFSET(xpm1b_event_block),
75 ACPI_FADT_OFFSET(pm1b_event_block),
76 ACPI_FADT_OFFSET(pm1_event_length)},
77 {ACPI_FADT_OFFSET(xpm1a_control_block),
78 ACPI_FADT_OFFSET(pm1a_control_block),
79 ACPI_FADT_OFFSET(pm1_control_length)},
80 {ACPI_FADT_OFFSET(xpm1b_control_block),
81 ACPI_FADT_OFFSET(pm1b_control_block),
82 ACPI_FADT_OFFSET(pm1_control_length)},
83 {ACPI_FADT_OFFSET(xpm2_control_block),
84 ACPI_FADT_OFFSET(pm2_control_block),
85 ACPI_FADT_OFFSET(pm2_control_length)},
86 {ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block),
87 ACPI_FADT_OFFSET(pm_timer_length)},
88 {ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block),
89 ACPI_FADT_OFFSET(gpe0_block_length)},
90 {ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block),
91 ACPI_FADT_OFFSET(gpe1_block_length)}
92};
93
94#define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion))
95
96/*******************************************************************************
97 *
98 * FUNCTION: acpi_tb_init_generic_address
99 *
100 * PARAMETERS: new_gas_struct - GAS struct to be initialized
101 * bit_width - Width of this register
102 * Address - Address of the register
103 *
104 * RETURN: None
105 *
106 * DESCRIPTION: Initialize a GAS structure.
107 *
108 ******************************************************************************/
109
110static void inline
111acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
112 u8 bit_width, u64 address)
113{
114
115 ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address);
116 new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
117 new_gas_struct->bit_width = bit_width;
118 new_gas_struct->bit_offset = 0;
119 new_gas_struct->access_width = 0;
120}
121
122/*******************************************************************************
123 *
124 * FUNCTION: acpi_tb_parse_fadt
125 *
126 * PARAMETERS: table_index - Index for the FADT
127 * Flags - Flags
128 *
129 * RETURN: None
130 *
131 * DESCRIPTION: Initialize the FADT, DSDT and FACS tables
132 * (FADT contains the addresses of the DSDT and FACS)
133 *
134 ******************************************************************************/
135
136void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
137{
138 u32 length;
139 struct acpi_table_header *table;
140
141 /*
142 * Special case for the FADT because of multiple versions and the fact
143 * that it contains pointers to both the DSDT and FACS tables.
144 *
145 * Get a local copy of the FADT and convert it to a common format
146 * Map entire FADT, assumed to be smaller than one page.
147 */
148 length = acpi_gbl_root_table_list.tables[table_index].length;
149
150 table =
151 acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index].
152 address, length);
153 if (!table) {
154 return;
155 }
156
157 /*
158 * Validate the FADT checksum before we copy the table. Ignore
159 * checksum error as we want to try to get the DSDT and FACS.
160 */
161 (void)acpi_tb_verify_checksum(table, length);
162
163 /* Copy the entire FADT locally */
164
165 ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
166
167 ACPI_MEMCPY(&acpi_gbl_FADT, table,
168 ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
169 acpi_os_unmap_memory(table, length);
170
171 /* Convert local FADT to the common internal format */
172
173 acpi_tb_convert_fadt();
174
175 /* Extract the DSDT and FACS tables from the FADT */
176
177 acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
178 flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
179
180 acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
181 flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
182
183 /* Validate important FADT values */
184
185 acpi_tb_validate_fadt();
186}
187
188/*******************************************************************************
189 *
190 * FUNCTION: acpi_tb_convert_fadt
191 *
192 * PARAMETERS: None, uses acpi_gbl_FADT
193 *
194 * RETURN: None
195 *
196 * DESCRIPTION: Converts all versions of the FADT to a common internal format.
197 *
198 * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must contain
199 * a copy of the actual FADT.
200 *
201 * ACPICA will use the "X" fields of the FADT for all addresses.
202 *
203 * "X" fields are optional extensions to the original V1.0 fields. Even if
204 * they are present in the structure, they can be optionally not used by
205 * setting them to zero. Therefore, we must selectively expand V1.0 fields
206 * if the corresponding X field is zero.
207 *
208 * For ACPI 1.0 FADTs, all address fields are expanded to the corresponding
209 * "X" fields.
210 *
211 * For ACPI 2.0 FADTs, any "X" fields that are NULL are filled in by
212 * expanding the corresponding ACPI 1.0 field.
213 *
214 ******************************************************************************/
215
216static void acpi_tb_convert_fadt(void)
217{
218 u8 pm1_register_length;
219 struct acpi_generic_address *target;
220 acpi_native_uint i;
221
222 /* Expand the FACS and DSDT addresses as necessary */
223
224 if (!acpi_gbl_FADT.Xfacs) {
225 acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
226 }
227
228 if (!acpi_gbl_FADT.Xdsdt) {
229 acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
230 }
231
232 /*
233 * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address
234 * structures as necessary.
235 */
236 for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) {
237 target =
238 ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
239 fadt_conversion_table[i].target);
240
241 /* Expand only if the X target is null */
242
243 if (!target->address) {
244 acpi_tb_init_generic_address(target,
245 *ACPI_ADD_PTR(u8,
246 &acpi_gbl_FADT,
247 fadt_conversion_table
248 [i].length),
249 (u64) * ACPI_ADD_PTR(u32,
250 &acpi_gbl_FADT,
251 fadt_conversion_table
252 [i].
253 source));
254 }
255 }
256
257 /*
258 * Calculate separate GAS structs for the PM1 Enable registers.
259 * These addresses do not appear (directly) in the FADT, so it is
260 * useful to calculate them once, here.
261 *
262 * The PM event blocks are split into two register blocks, first is the
263 * PM Status Register block, followed immediately by the PM Enable Register
264 * block. Each is of length (pm1_event_length/2)
265 */
266 pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
267
268 /* PM1A is required */
269
270 acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
271 pm1_register_length,
272 (acpi_gbl_FADT.xpm1a_event_block.address +
273 pm1_register_length));
274
275 /* PM1B is optional; leave null if not present */
276
277 if (acpi_gbl_FADT.xpm1b_event_block.address) {
278 acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
279 pm1_register_length,
280 (acpi_gbl_FADT.xpm1b_event_block.
281 address + pm1_register_length));
282 }
283
284 /* Global FADT is the new common V2.0 FADT */
285
286 acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
287}
288
289/******************************************************************************
290 *
291 * FUNCTION: acpi_tb_validate_fadt
292 *
293 * PARAMETERS: None
294 *
295 * RETURN: Status
296 *
297 * DESCRIPTION: Validate various ACPI registers in the FADT
298 *
299 ******************************************************************************/
300
301static void acpi_tb_validate_fadt(void)
302{
303
304 /* These length fields have a minimum value */
305
306 if (acpi_gbl_FADT.pm1_event_length < 4) {
307 acpi_tb_fadt_register_error("Pm1EventLength",
308 (u32) acpi_gbl_FADT.
309 pm1_event_length);
310 }
311
312 if (acpi_gbl_FADT.pm_timer_length < 4) {
313 acpi_tb_fadt_register_error("PmTimerLength",
314 (u32) acpi_gbl_FADT.
315 pm_timer_length);
316 }
317
318 /* These length and address fields must be non-zero */
319
320 if (!acpi_gbl_FADT.pm1_control_length) {
321 acpi_tb_fadt_register_error("Pm1ControlLength", 0);
322 }
323
324 if (!acpi_gbl_FADT.xpm1a_event_block.address) {
325 acpi_tb_fadt_register_error("XPm1aEventBlock.Address", 0);
326 }
327
328 if (!acpi_gbl_FADT.xpm1a_control_block.address) {
329 acpi_tb_fadt_register_error("XPm1aControlBlock.Address", 0);
330 }
331
332 if (!acpi_gbl_FADT.xpm_timer_block.address) {
333 acpi_tb_fadt_register_error("XPmTimerBlock.Address", 0);
334 }
335
336 /* If PM2 block is present, must have non-zero length */
337
338 if ((acpi_gbl_FADT.xpm2_control_block.address &&
339 !acpi_gbl_FADT.pm2_control_length)) {
340 acpi_tb_fadt_register_error("Pm2ControlLength",
341 (u32) acpi_gbl_FADT.
342 pm2_control_length);
343 }
344
345 /* Length of any valid GPE blocks must be a multiple of 2 */
346
347 if (acpi_gbl_FADT.xgpe0_block.address &&
348 (acpi_gbl_FADT.gpe0_block_length & 1)) {
349 acpi_tb_fadt_register_error("Gpe0BlockLength",
350 (u32) acpi_gbl_FADT.
351 gpe0_block_length);
352 }
353
354 if (acpi_gbl_FADT.xgpe1_block.address &&
355 (acpi_gbl_FADT.gpe1_block_length & 1)) {
356 acpi_tb_fadt_register_error("Gpe1BlockLength",
357 (u32) acpi_gbl_FADT.
358 gpe1_block_length);
359 }
360}
361
362/*******************************************************************************
363 *
364 * FUNCTION: acpi_tb_fadt_register_error
365 *
366 * PARAMETERS: register_name - Pointer to string identifying register
367 * Value - Actual register contents value
368 *
369 * RETURN: None
370 *
371 * DESCRIPTION: Display FADT warning message
372 *
373 ******************************************************************************/
374
375static void acpi_tb_fadt_register_error(char *register_name, u32 value)
376{
377
378 ACPI_WARNING((AE_INFO, "Invalid FADT value \"%s\" = %X",
379 register_name, value));
380}