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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: exutils - interpreter/scanner utilities
4 *
5 *****************************************************************************/
6
7/*
Bob Moorefbb7a2d2014-02-08 09:42:25 +08008 * Copyright (C) 2000 - 2014, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044/*
45 * DEFINE_AML_GLOBALS is tested in amlcode.h
46 * to determine whether certain global names should be "defined" or only
Bob Moore73a30902012-10-31 02:26:55 +000047 * "declared" in the current compilation. This enhances maintainability
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 * by enabling a single header file to embody all knowledge of the names
49 * in question.
50 *
51 * Exactly one module of any executable should #define DEFINE_GLOBALS
Bob Moore73a30902012-10-31 02:26:55 +000052 * before #including the header files which use this convention. The
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 * names in question will be defined and initialized in that module,
54 * and declared as extern in all other modules which #include those
55 * header files.
56 */
57
58#define DEFINE_AML_GLOBALS
59
60#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050061#include "accommon.h"
62#include "acinterp.h"
63#include "amlcode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040066ACPI_MODULE_NAME("exutils")
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Robert Moore44f6c012005-04-18 22:49:35 -040068/* Local prototypes */
Bob Moore5df7e6c2010-01-21 10:06:32 +080069static u32 acpi_ex_digits_needed(u64 value, u32 base);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71#ifndef ACPI_NO_METHOD_EXECUTION
Linus Torvalds1da177e2005-04-16 15:20:36 -070072/*******************************************************************************
73 *
74 * FUNCTION: acpi_ex_enter_interpreter
75 *
76 * PARAMETERS: None
77 *
Len Brown4d2acd92007-05-09 22:56:38 -040078 * RETURN: None
Robert Moore44f6c012005-04-18 22:49:35 -040079 *
Len Brown4d2acd92007-05-09 22:56:38 -040080 * DESCRIPTION: Enter the interpreter execution region. Failure to enter
81 * the interpreter region is a fatal system error. Used in
82 * conjunction with exit_interpreter.
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 *
84 ******************************************************************************/
85
Len Brown4d2acd92007-05-09 22:56:38 -040086void acpi_ex_enter_interpreter(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Len Brown4be44fc2005-08-05 00:44:28 -040088 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Bob Moore977a6222007-02-02 19:48:20 +030090 ACPI_FUNCTION_TRACE(ex_enter_interpreter);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Bob Moore4c90ece2006-06-08 16:29:00 -040092 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
Len Brown4be44fc2005-08-05 00:44:28 -040093 if (ACPI_FAILURE(status)) {
Len Brown4d2acd92007-05-09 22:56:38 -040094 ACPI_ERROR((AE_INFO,
95 "Could not acquire AML Interpreter mutex"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 }
97
Len Brown4d2acd92007-05-09 22:56:38 -040098 return_VOID;
99}
100
101/*******************************************************************************
102 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 * FUNCTION: acpi_ex_exit_interpreter
104 *
105 * PARAMETERS: None
106 *
Robert Moore44f6c012005-04-18 22:49:35 -0400107 * RETURN: None
108 *
Len Brown4d2acd92007-05-09 22:56:38 -0400109 * DESCRIPTION: Exit the interpreter execution region. This is the top level
110 * routine used to exit the interpreter when all processing has
Lv Zhenge2b8ddc2014-03-24 14:48:45 +0800111 * been completed, or when the method blocks.
112 *
113 * Cases where the interpreter is unlocked internally:
114 * 1) Method will be blocked on a Sleep() AML opcode
115 * 2) Method will be blocked on an Acquire() AML opcode
116 * 3) Method will be blocked on a Wait() AML opcode
117 * 4) Method will be blocked to acquire the global lock
118 * 5) Method will be blocked waiting to execute a serialized control
119 * method that is currently executing
120 * 6) About to invoke a user-installed opregion handler
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 *
122 ******************************************************************************/
123
Len Brown4be44fc2005-08-05 00:44:28 -0400124void acpi_ex_exit_interpreter(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125{
Len Brown4be44fc2005-08-05 00:44:28 -0400126 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Bob Mooreb229cf92006-04-21 17:15:00 -0400128 ACPI_FUNCTION_TRACE(ex_exit_interpreter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Bob Moore4c90ece2006-06-08 16:29:00 -0400130 status = acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
Len Brown4be44fc2005-08-05 00:44:28 -0400131 if (ACPI_FAILURE(status)) {
Len Brown4d2acd92007-05-09 22:56:38 -0400132 ACPI_ERROR((AE_INFO,
133 "Could not release AML Interpreter mutex"));
134 }
135
136 return_VOID;
137}
138
139/*******************************************************************************
140 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 * FUNCTION: acpi_ex_truncate_for32bit_table
142 *
143 * PARAMETERS: obj_desc - Object to be truncated
144 *
Bob Mooreef42e532012-12-31 00:07:18 +0000145 * RETURN: TRUE if a truncation was performed, FALSE otherwise.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 *
Len Brown4d2acd92007-05-09 22:56:38 -0400147 * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is
148 * 32-bit, as determined by the revision of the DSDT.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 *
150 ******************************************************************************/
151
Bob Mooreef42e532012-12-31 00:07:18 +0000152u8 acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
154
Len Brown4be44fc2005-08-05 00:44:28 -0400155 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 /*
158 * Object must be a valid number and we must be executing
Bob Mooreef42e532012-12-31 00:07:18 +0000159 * a control method. Object could be NS node for AML_INT_NAMEPATH_OP.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 */
161 if ((!obj_desc) ||
Bob Moore4e3156b2008-04-10 19:06:37 +0400162 (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) ||
Bob Moore3371c192009-02-18 14:44:03 +0800163 (obj_desc->common.type != ACPI_TYPE_INTEGER)) {
Bob Mooreef42e532012-12-31 00:07:18 +0000164 return (FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 }
166
Bob Mooreef42e532012-12-31 00:07:18 +0000167 if ((acpi_gbl_integer_byte_width == 4) &&
168 (obj_desc->integer.value > (u64)ACPI_UINT32_MAX)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 /*
Bob Mooreef42e532012-12-31 00:07:18 +0000170 * We are executing in a 32-bit ACPI table.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 * Truncate the value to 32 bits by zeroing out the upper 32-bit field
172 */
Bob Mooreef42e532012-12-31 00:07:18 +0000173 obj_desc->integer.value &= (u64)ACPI_UINT32_MAX;
174 return (TRUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 }
Bob Mooreef42e532012-12-31 00:07:18 +0000176
177 return (FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178}
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180/*******************************************************************************
181 *
182 * FUNCTION: acpi_ex_acquire_global_lock
183 *
184 * PARAMETERS: field_flags - Flags with Lock rule:
185 * always_lock or never_lock
186 *
Bob Mooreba886cd2008-04-10 19:06:37 +0400187 * RETURN: None
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 *
Bob Mooreba886cd2008-04-10 19:06:37 +0400189 * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field
190 * flags specifiy that it is to be obtained before field access.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 *
192 ******************************************************************************/
193
Bob Mooreba886cd2008-04-10 19:06:37 +0400194void acpi_ex_acquire_global_lock(u32 field_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Len Brown4be44fc2005-08-05 00:44:28 -0400196 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Bob Mooreb229cf92006-04-21 17:15:00 -0400198 ACPI_FUNCTION_TRACE(ex_acquire_global_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Bob Mooreba886cd2008-04-10 19:06:37 +0400200 /* Only use the lock if the always_lock bit is set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Bob Mooreba886cd2008-04-10 19:06:37 +0400202 if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
203 return_VOID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 }
205
Bob Mooreba886cd2008-04-10 19:06:37 +0400206 /* Attempt to get the global lock, wait forever */
207
208 status = acpi_ex_acquire_mutex_object(ACPI_WAIT_FOREVER,
209 acpi_gbl_global_lock_mutex,
210 acpi_os_get_thread_id());
211
212 if (ACPI_FAILURE(status)) {
213 ACPI_EXCEPTION((AE_INFO, status,
214 "Could not acquire Global Lock"));
215 }
216
217 return_VOID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218}
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220/*******************************************************************************
221 *
222 * FUNCTION: acpi_ex_release_global_lock
223 *
Bob Mooref02e9fa2008-04-10 19:06:37 +0400224 * PARAMETERS: field_flags - Flags with Lock rule:
225 * always_lock or never_lock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 *
Robert Moore44f6c012005-04-18 22:49:35 -0400227 * RETURN: None
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 *
Bob Mooreba886cd2008-04-10 19:06:37 +0400229 * DESCRIPTION: Release the ACPI hardware Global Lock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 *
231 ******************************************************************************/
232
Bob Mooref02e9fa2008-04-10 19:06:37 +0400233void acpi_ex_release_global_lock(u32 field_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
Len Brown4be44fc2005-08-05 00:44:28 -0400235 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Bob Mooreb229cf92006-04-21 17:15:00 -0400237 ACPI_FUNCTION_TRACE(ex_release_global_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Bob Mooref02e9fa2008-04-10 19:06:37 +0400239 /* Only use the lock if the always_lock bit is set */
240
241 if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
242 return_VOID;
243 }
244
Bob Mooreba886cd2008-04-10 19:06:37 +0400245 /* Release the global lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Bob Mooreba886cd2008-04-10 19:06:37 +0400247 status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
248 if (ACPI_FAILURE(status)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400249
Bob Mooreba886cd2008-04-10 19:06:37 +0400250 /* Report the error, but there isn't much else we can do */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Bob Mooreba886cd2008-04-10 19:06:37 +0400252 ACPI_EXCEPTION((AE_INFO, status,
253 "Could not release Global Lock"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 }
255
256 return_VOID;
257}
258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259/*******************************************************************************
260 *
261 * FUNCTION: acpi_ex_digits_needed
262 *
Bob Mooreba494be2012-07-12 09:40:10 +0800263 * PARAMETERS: value - Value to be represented
264 * base - Base of representation
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 *
Robert Moore44f6c012005-04-18 22:49:35 -0400266 * RETURN: The number of digits.
267 *
268 * DESCRIPTION: Calculate the number of digits needed to represent the Value
269 * in the given Base (Radix)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 *
271 ******************************************************************************/
272
Bob Moore5df7e6c2010-01-21 10:06:32 +0800273static u32 acpi_ex_digits_needed(u64 value, u32 base)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{
Len Brown4be44fc2005-08-05 00:44:28 -0400275 u32 num_digits;
Bob Moore5df7e6c2010-01-21 10:06:32 +0800276 u64 current_value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Bob Mooreb229cf92006-04-21 17:15:00 -0400278 ACPI_FUNCTION_TRACE(ex_digits_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Bob Moore5df7e6c2010-01-21 10:06:32 +0800280 /* u64 is unsigned, so we don't worry about a '-' prefix */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
282 if (value == 0) {
Bob Moorefd1af712013-03-08 09:22:23 +0000283 return_UINT32(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 }
285
286 current_value = value;
287 num_digits = 0;
288
289 /* Count the digits in the requested base */
290
291 while (current_value) {
Len Brown4be44fc2005-08-05 00:44:28 -0400292 (void)acpi_ut_short_divide(current_value, base, &current_value,
293 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 num_digits++;
295 }
296
Bob Moorefd1af712013-03-08 09:22:23 +0000297 return_UINT32(num_digits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298}
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300/*******************************************************************************
301 *
302 * FUNCTION: acpi_ex_eisa_id_to_string
303 *
Bob Moore15b8dd52009-06-29 13:39:29 +0800304 * PARAMETERS: compressed_id - EISAID to be converted
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 * out_string - Where to put the converted string (8 bytes)
306 *
Robert Moore44f6c012005-04-18 22:49:35 -0400307 * RETURN: None
308 *
Bob Moore15b8dd52009-06-29 13:39:29 +0800309 * DESCRIPTION: Convert a numeric EISAID to string representation. Return
310 * buffer must be large enough to hold the string. The string
311 * returned is always exactly of length ACPI_EISAID_STRING_SIZE
312 * (includes null terminator). The EISAID is always 32 bits.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 *
314 ******************************************************************************/
315
Bob Moore5df7e6c2010-01-21 10:06:32 +0800316void acpi_ex_eisa_id_to_string(char *out_string, u64 compressed_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
Bob Moore15b8dd52009-06-29 13:39:29 +0800318 u32 swapped_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Len Brown4be44fc2005-08-05 00:44:28 -0400320 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Bob Moore15b8dd52009-06-29 13:39:29 +0800322 /* The EISAID should be a 32-bit integer */
323
324 if (compressed_id > ACPI_UINT32_MAX) {
325 ACPI_WARNING((AE_INFO,
326 "Expected EISAID is larger than 32 bits: 0x%8.8X%8.8X, truncating",
327 ACPI_FORMAT_UINT64(compressed_id)));
328 }
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 /* Swap ID to big-endian to get contiguous bits */
331
Bob Moore15b8dd52009-06-29 13:39:29 +0800332 swapped_id = acpi_ut_dword_byte_swap((u32)compressed_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Bob Moore15b8dd52009-06-29 13:39:29 +0800334 /* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */
335
336 out_string[0] =
337 (char)(0x40 + (((unsigned long)swapped_id >> 26) & 0x1F));
338 out_string[1] = (char)(0x40 + ((swapped_id >> 21) & 0x1F));
339 out_string[2] = (char)(0x40 + ((swapped_id >> 16) & 0x1F));
Bob Moore5df7e6c2010-01-21 10:06:32 +0800340 out_string[3] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 12);
341 out_string[4] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 8);
342 out_string[5] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 4);
343 out_string[6] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 out_string[7] = 0;
345}
346
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347/*******************************************************************************
348 *
Bob Moore15b8dd52009-06-29 13:39:29 +0800349 * FUNCTION: acpi_ex_integer_to_string
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 *
Bob Moore15b8dd52009-06-29 13:39:29 +0800351 * PARAMETERS: out_string - Where to put the converted string. At least
352 * 21 bytes are needed to hold the largest
353 * possible 64-bit integer.
Bob Mooreba494be2012-07-12 09:40:10 +0800354 * value - Value to be converted
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 *
Robert Moore44f6c012005-04-18 22:49:35 -0400356 * RETURN: None, string
357 *
Bob Moore15b8dd52009-06-29 13:39:29 +0800358 * DESCRIPTION: Convert a 64-bit integer to decimal string representation.
359 * Assumes string buffer is large enough to hold the string. The
360 * largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 *
362 ******************************************************************************/
363
Bob Moore5df7e6c2010-01-21 10:06:32 +0800364void acpi_ex_integer_to_string(char *out_string, u64 value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365{
Len Brown4be44fc2005-08-05 00:44:28 -0400366 u32 count;
367 u32 digits_needed;
368 u32 remainder;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Len Brown4be44fc2005-08-05 00:44:28 -0400370 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Len Brown4be44fc2005-08-05 00:44:28 -0400372 digits_needed = acpi_ex_digits_needed(value, 10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 out_string[digits_needed] = 0;
374
375 for (count = digits_needed; count > 0; count--) {
Len Brown4be44fc2005-08-05 00:44:28 -0400376 (void)acpi_ut_short_divide(value, 10, &value, &remainder);
377 out_string[count - 1] = (char)('0' + remainder);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 }
379}
380
Bob Mooreec463662011-11-30 09:35:05 +0800381/*******************************************************************************
382 *
383 * FUNCTION: acpi_is_valid_space_id
384 *
385 * PARAMETERS: space_id - ID to be validated
386 *
387 * RETURN: TRUE if valid/supported ID.
388 *
Bob Mooreba494be2012-07-12 09:40:10 +0800389 * DESCRIPTION: Validate an operation region space_ID.
Bob Mooreec463662011-11-30 09:35:05 +0800390 *
391 ******************************************************************************/
392
393u8 acpi_is_valid_space_id(u8 space_id)
394{
395
396 if ((space_id >= ACPI_NUM_PREDEFINED_REGIONS) &&
397 (space_id < ACPI_USER_REGION_BEGIN) &&
398 (space_id != ACPI_ADR_SPACE_DATA_TABLE) &&
399 (space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
400 return (FALSE);
401 }
402
403 return (TRUE);
404}
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406#endif