Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: tbxface - Public interfaces to the ACPI subsystem |
| 4 | * ACPI table oriented interfaces |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
Len Brown | 75a44ce | 2008-04-23 23:00:13 -0400 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2008, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 46 | #include "accommon.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "actables.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define _COMPONENT ACPI_TABLES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("tbxface") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 53 | /* Local prototypes */ |
| 54 | static acpi_status acpi_tb_load_namespace(void); |
| 55 | |
Len Brown | 67effe8 | 2007-07-26 00:50:06 -0400 | [diff] [blame] | 56 | static int no_auto_ssdt; |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /******************************************************************************* |
| 59 | * |
Bob Moore | 77389e1 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 60 | * FUNCTION: acpi_allocate_root_table |
| 61 | * |
| 62 | * PARAMETERS: initial_table_count - Size of initial_table_array, in number of |
| 63 | * struct acpi_table_desc structures |
| 64 | * |
| 65 | * RETURN: Status |
| 66 | * |
| 67 | * DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and |
| 68 | * acpi_initialize_tables. |
| 69 | * |
| 70 | ******************************************************************************/ |
| 71 | |
| 72 | acpi_status acpi_allocate_root_table(u32 initial_table_count) |
| 73 | { |
| 74 | |
| 75 | acpi_gbl_root_table_list.size = initial_table_count; |
| 76 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE; |
| 77 | |
| 78 | return (acpi_tb_resize_root_table_list()); |
| 79 | } |
| 80 | |
| 81 | /******************************************************************************* |
| 82 | * |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 83 | * FUNCTION: acpi_initialize_tables |
| 84 | * |
| 85 | * PARAMETERS: initial_table_array - Pointer to an array of pre-allocated |
| 86 | * struct acpi_table_desc structures. If NULL, the |
| 87 | * array is dynamically allocated. |
| 88 | * initial_table_count - Size of initial_table_array, in number of |
| 89 | * struct acpi_table_desc structures |
| 90 | * allow_realloc - Flag to tell Table Manager if resize of |
| 91 | * pre-allocated array is allowed. Ignored |
| 92 | * if initial_table_array is NULL. |
| 93 | * |
| 94 | * RETURN: Status |
| 95 | * |
| 96 | * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT. |
| 97 | * |
| 98 | * NOTE: Allows static allocation of the initial table array in order |
| 99 | * to avoid the use of dynamic memory in confined environments |
| 100 | * such as the kernel boot sequence where it may not be available. |
| 101 | * |
| 102 | * If the host OS memory managers are initialized, use NULL for |
| 103 | * initial_table_array, and the table will be dynamically allocated. |
| 104 | * |
| 105 | ******************************************************************************/ |
| 106 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 107 | acpi_status __init |
Bob Moore | 77389e1 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 108 | acpi_initialize_tables(struct acpi_table_desc * initial_table_array, |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 109 | u32 initial_table_count, u8 allow_resize) |
| 110 | { |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 111 | acpi_physical_address rsdp_address; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 112 | acpi_status status; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 113 | |
| 114 | ACPI_FUNCTION_TRACE(acpi_initialize_tables); |
| 115 | |
| 116 | /* |
| 117 | * Set up the Root Table Array |
| 118 | * Allocate the table array if requested |
| 119 | */ |
| 120 | if (!initial_table_array) { |
Bob Moore | 77389e1 | 2007-02-02 19:48:20 +0300 | [diff] [blame] | 121 | status = acpi_allocate_root_table(initial_table_count); |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 122 | if (ACPI_FAILURE(status)) { |
| 123 | return_ACPI_STATUS(status); |
| 124 | } |
| 125 | } else { |
| 126 | /* Root Table Array has been statically allocated by the host */ |
| 127 | |
Bob Moore | a4bbb81 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 128 | ACPI_MEMSET(initial_table_array, 0, |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 129 | (acpi_size) initial_table_count * |
Bob Moore | a4bbb81 | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 130 | sizeof(struct acpi_table_desc)); |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 131 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 132 | acpi_gbl_root_table_list.tables = initial_table_array; |
| 133 | acpi_gbl_root_table_list.size = initial_table_count; |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 134 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 135 | if (allow_resize) { |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 136 | acpi_gbl_root_table_list.flags |= |
| 137 | ACPI_ROOT_ALLOW_RESIZE; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 138 | } |
| 139 | } |
| 140 | |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 141 | /* Get the address of the RSDP */ |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 142 | |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 143 | rsdp_address = acpi_os_get_root_pointer(); |
| 144 | if (!rsdp_address) { |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 145 | return_ACPI_STATUS(AE_NOT_FOUND); |
| 146 | } |
| 147 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 148 | /* |
| 149 | * Get the root table (RSDT or XSDT) and extract all entries to the local |
| 150 | * Root Table Array. This array contains the information of the RSDT/XSDT |
| 151 | * in a common, more useable format. |
| 152 | */ |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 153 | status = |
| 154 | acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED); |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 155 | return_ACPI_STATUS(status); |
| 156 | } |
| 157 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 158 | /******************************************************************************* |
| 159 | * |
| 160 | * FUNCTION: acpi_reallocate_root_table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | * |
| 162 | * PARAMETERS: None |
| 163 | * |
| 164 | * RETURN: Status |
| 165 | * |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 166 | * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the |
| 167 | * root list from the previously provided scratch area. Should |
| 168 | * be called once dynamic memory allocation is available in the |
| 169 | * kernel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | * |
| 171 | ******************************************************************************/ |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 172 | acpi_status acpi_reallocate_root_table(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | { |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 174 | struct acpi_table_desc *tables; |
| 175 | acpi_size new_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 177 | ACPI_FUNCTION_TRACE(acpi_reallocate_root_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 179 | /* |
| 180 | * Only reallocate the root table if the host provided a static buffer |
| 181 | * for the table array in the call to acpi_initialize_tables. |
| 182 | */ |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 183 | if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 184 | return_ACPI_STATUS(AE_SUPPORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 187 | new_size = ((acpi_size) acpi_gbl_root_table_list.count + |
| 188 | ACPI_ROOT_TABLE_SIZE_INCREMENT) * |
| 189 | sizeof(struct acpi_table_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 191 | /* Create new array and copy the old array */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 193 | tables = ACPI_ALLOCATE_ZEROED(new_size); |
| 194 | if (!tables) { |
| 195 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 198 | ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 200 | acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count; |
| 201 | acpi_gbl_root_table_list.tables = tables; |
| 202 | acpi_gbl_root_table_list.flags = |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 203 | ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 205 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
Len Brown | fd35094 | 2007-05-09 23:34:35 -0400 | [diff] [blame] | 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | /******************************************************************************* |
| 209 | * |
| 210 | * FUNCTION: acpi_load_table |
| 211 | * |
| 212 | * PARAMETERS: table_ptr - pointer to a buffer containing the entire |
| 213 | * table to be loaded |
| 214 | * |
| 215 | * RETURN: Status |
| 216 | * |
| 217 | * DESCRIPTION: This function is called to load a table from the caller's |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 218 | * buffer. The buffer must contain an entire ACPI Table including |
| 219 | * a valid header. The header fields will be verified, and if it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | * is determined that the table is invalid, the call will fail. |
| 221 | * |
| 222 | ******************************************************************************/ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 223 | acpi_status acpi_load_table(struct acpi_table_header *table_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 225 | acpi_status status; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 226 | u32 table_index; |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 227 | struct acpi_table_desc table_desc; |
| 228 | |
| 229 | if (!table_ptr) |
| 230 | return AE_BAD_PARAMETER; |
| 231 | |
| 232 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); |
| 233 | table_desc.pointer = table_ptr; |
| 234 | table_desc.length = table_ptr->length; |
| 235 | table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 237 | /* |
| 238 | * Install the new table into the local data structures |
| 239 | */ |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 240 | status = acpi_tb_add_table(&table_desc, &table_index); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 241 | if (ACPI_FAILURE(status)) { |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 242 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 244 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 245 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 248 | ACPI_EXPORT_SYMBOL(acpi_load_table) |
| 249 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 250 | /****************************************************************************** |
| 251 | * |
| 252 | * FUNCTION: acpi_get_table_header |
| 253 | * |
| 254 | * PARAMETERS: Signature - ACPI signature of needed table |
| 255 | * Instance - Which instance (for SSDTs) |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 256 | * out_table_header - The pointer to the table header to fill |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 257 | * |
| 258 | * RETURN: Status and pointer to mapped table header |
| 259 | * |
| 260 | * DESCRIPTION: Finds an ACPI table header. |
| 261 | * |
| 262 | * NOTE: Caller is responsible in unmapping the header with |
| 263 | * acpi_os_unmap_memory |
| 264 | * |
| 265 | *****************************************************************************/ |
| 266 | acpi_status |
| 267 | acpi_get_table_header(char *signature, |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 268 | u32 instance, struct acpi_table_header *out_table_header) |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 269 | { |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 270 | u32 i; |
| 271 | u32 j; |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 272 | struct acpi_table_header *header; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 273 | |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 274 | /* Parameter validation */ |
| 275 | |
| 276 | if (!signature || !out_table_header) { |
| 277 | return (AE_BAD_PARAMETER); |
| 278 | } |
| 279 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 280 | /* |
| 281 | * Walk the root table list |
| 282 | */ |
| 283 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { |
| 284 | if (!ACPI_COMPARE_NAME |
| 285 | (&(acpi_gbl_root_table_list.tables[i].signature), |
| 286 | signature)) { |
| 287 | continue; |
| 288 | } |
| 289 | |
| 290 | if (++j < instance) { |
| 291 | continue; |
| 292 | } |
| 293 | |
Alexey Starikovskiy | 428f211 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 294 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
| 295 | if ((acpi_gbl_root_table_list.tables[i]. |
| 296 | flags & ACPI_TABLE_ORIGIN_MASK) == |
| 297 | ACPI_TABLE_ORIGIN_MAPPED) { |
| 298 | header = |
| 299 | acpi_os_map_memory(acpi_gbl_root_table_list. |
| 300 | tables[i].address, |
| 301 | sizeof(struct |
| 302 | acpi_table_header)); |
| 303 | if (!header) { |
| 304 | return AE_NO_MEMORY; |
| 305 | } |
| 306 | ACPI_MEMCPY(out_table_header, header, |
| 307 | sizeof(struct acpi_table_header)); |
| 308 | acpi_os_unmap_memory(header, |
| 309 | sizeof(struct |
| 310 | acpi_table_header)); |
| 311 | } else { |
| 312 | return AE_NOT_FOUND; |
| 313 | } |
| 314 | } else { |
| 315 | ACPI_MEMCPY(out_table_header, |
| 316 | acpi_gbl_root_table_list.tables[i].pointer, |
| 317 | sizeof(struct acpi_table_header)); |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 318 | } |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 319 | return (AE_OK); |
| 320 | } |
| 321 | |
| 322 | return (AE_NOT_FOUND); |
| 323 | } |
| 324 | |
| 325 | ACPI_EXPORT_SYMBOL(acpi_get_table_header) |
| 326 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 327 | /****************************************************************************** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | * |
John Keller | 0f0fe1a | 2006-12-19 12:56:19 -0800 | [diff] [blame] | 329 | * FUNCTION: acpi_unload_table_id |
| 330 | * |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 331 | * PARAMETERS: id - Owner ID of the table to be removed. |
John Keller | 0f0fe1a | 2006-12-19 12:56:19 -0800 | [diff] [blame] | 332 | * |
| 333 | * RETURN: Status |
| 334 | * |
| 335 | * DESCRIPTION: This routine is used to force the unload of a table (by id) |
| 336 | * |
| 337 | ******************************************************************************/ |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 338 | acpi_status acpi_unload_table_id(acpi_owner_id id) |
John Keller | 0f0fe1a | 2006-12-19 12:56:19 -0800 | [diff] [blame] | 339 | { |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 340 | int i; |
| 341 | acpi_status status = AE_NOT_EXIST; |
John Keller | 0f0fe1a | 2006-12-19 12:56:19 -0800 | [diff] [blame] | 342 | |
John Keller | ecb5f75 | 2007-02-15 14:08:30 -0600 | [diff] [blame] | 343 | ACPI_FUNCTION_TRACE(acpi_unload_table_id); |
John Keller | 0f0fe1a | 2006-12-19 12:56:19 -0800 | [diff] [blame] | 344 | |
John Keller | ecb5f75 | 2007-02-15 14:08:30 -0600 | [diff] [blame] | 345 | /* Find table in the global table list */ |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 346 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
| 347 | if (id != acpi_gbl_root_table_list.tables[i].owner_id) { |
| 348 | continue; |
| 349 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | /* |
Len Brown | fd35094 | 2007-05-09 23:34:35 -0400 | [diff] [blame] | 351 | * Delete all namespace objects owned by this table. Note that these |
| 352 | * objects can appear anywhere in the namespace by virtue of the AML |
| 353 | * "Scope" operator. Thus, we need to track ownership by an ID, not |
| 354 | * simply a position within the hierarchy |
| 355 | */ |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 356 | acpi_tb_delete_namespace_by_owner(i); |
John Keller | ecb5f75 | 2007-02-15 14:08:30 -0600 | [diff] [blame] | 357 | status = acpi_tb_release_owner_id(i); |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 358 | acpi_tb_set_table_loaded_flag(i, FALSE); |
John Keller | ecb5f75 | 2007-02-15 14:08:30 -0600 | [diff] [blame] | 359 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 361 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | } |
| 363 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 364 | ACPI_EXPORT_SYMBOL(acpi_unload_table_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
| 366 | /******************************************************************************* |
| 367 | * |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame^] | 368 | * FUNCTION: acpi_get_table_with_size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | * |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 370 | * PARAMETERS: Signature - ACPI signature of needed table |
| 371 | * Instance - Which instance (for SSDTs) |
| 372 | * out_table - Where the pointer to the table is returned |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | * |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 374 | * RETURN: Status and pointer to table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | * |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 376 | * DESCRIPTION: Finds and verifies an ACPI table. |
| 377 | * |
| 378 | *****************************************************************************/ |
| 379 | acpi_status |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame^] | 380 | acpi_get_table_with_size(char *signature, |
| 381 | u32 instance, struct acpi_table_header **out_table, |
| 382 | acpi_size *tbl_size) |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 383 | { |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 384 | u32 i; |
| 385 | u32 j; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 386 | acpi_status status; |
| 387 | |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 388 | /* Parameter validation */ |
| 389 | |
| 390 | if (!signature || !out_table) { |
| 391 | return (AE_BAD_PARAMETER); |
| 392 | } |
| 393 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 394 | /* |
| 395 | * Walk the root table list |
| 396 | */ |
| 397 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { |
| 398 | if (!ACPI_COMPARE_NAME |
| 399 | (&(acpi_gbl_root_table_list.tables[i].signature), |
| 400 | signature)) { |
| 401 | continue; |
| 402 | } |
| 403 | |
| 404 | if (++j < instance) { |
| 405 | continue; |
| 406 | } |
| 407 | |
| 408 | status = |
| 409 | acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]); |
| 410 | if (ACPI_SUCCESS(status)) { |
| 411 | *out_table = acpi_gbl_root_table_list.tables[i].pointer; |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame^] | 412 | *tbl_size = acpi_gbl_root_table_list.tables[i].length; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 413 | } |
| 414 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 415 | if (!acpi_gbl_permanent_mmap) { |
Randy Dunlap | 70c0846 | 2007-02-13 16:11:36 -0800 | [diff] [blame] | 416 | acpi_gbl_root_table_list.tables[i].pointer = NULL; |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 417 | } |
| 418 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 419 | return (status); |
| 420 | } |
| 421 | |
| 422 | return (AE_NOT_FOUND); |
| 423 | } |
| 424 | |
Yinghai Lu | 7d97277 | 2009-02-07 15:39:41 -0800 | [diff] [blame^] | 425 | acpi_status |
| 426 | acpi_get_table(char *signature, |
| 427 | u32 instance, struct acpi_table_header **out_table) |
| 428 | { |
| 429 | acpi_size tbl_size; |
| 430 | |
| 431 | return acpi_get_table_with_size(signature, |
| 432 | instance, out_table, &tbl_size); |
| 433 | } |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 434 | ACPI_EXPORT_SYMBOL(acpi_get_table) |
| 435 | |
| 436 | /******************************************************************************* |
| 437 | * |
| 438 | * FUNCTION: acpi_get_table_by_index |
| 439 | * |
| 440 | * PARAMETERS: table_index - Table index |
| 441 | * Table - Where the pointer to the table is returned |
| 442 | * |
| 443 | * RETURN: Status and pointer to the table |
| 444 | * |
| 445 | * DESCRIPTION: Obtain a table by an index into the global table list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | * |
| 447 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | acpi_status |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 449 | acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 451 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 453 | ACPI_FUNCTION_TRACE(acpi_get_table_by_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Bob Moore | c5fc42a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 455 | /* Parameter validation */ |
| 456 | |
| 457 | if (!table) { |
| 458 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 459 | } |
| 460 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 461 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 463 | /* Validate index */ |
| 464 | |
| 465 | if (table_index >= acpi_gbl_root_table_list.count) { |
| 466 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 467 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 470 | if (!acpi_gbl_root_table_list.tables[table_index].pointer) { |
| 471 | |
| 472 | /* Table is not mapped, map it */ |
| 473 | |
| 474 | status = |
| 475 | acpi_tb_verify_table(&acpi_gbl_root_table_list. |
| 476 | tables[table_index]); |
| 477 | if (ACPI_FAILURE(status)) { |
| 478 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
| 479 | return_ACPI_STATUS(status); |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | *table = acpi_gbl_root_table_list.tables[table_index].pointer; |
| 484 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
| 485 | return_ACPI_STATUS(AE_OK); |
| 486 | } |
| 487 | |
| 488 | ACPI_EXPORT_SYMBOL(acpi_get_table_by_index) |
| 489 | |
| 490 | /******************************************************************************* |
| 491 | * |
| 492 | * FUNCTION: acpi_tb_load_namespace |
| 493 | * |
| 494 | * PARAMETERS: None |
| 495 | * |
| 496 | * RETURN: Status |
| 497 | * |
| 498 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in |
| 499 | * the RSDT/XSDT. |
| 500 | * |
| 501 | ******************************************************************************/ |
| 502 | static acpi_status acpi_tb_load_namespace(void) |
| 503 | { |
| 504 | acpi_status status; |
| 505 | struct acpi_table_header *table; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 506 | u32 i; |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 507 | |
| 508 | ACPI_FUNCTION_TRACE(tb_load_namespace); |
| 509 | |
| 510 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
| 511 | |
| 512 | /* |
| 513 | * Load the namespace. The DSDT is required, but any SSDT and PSDT tables |
| 514 | * are optional. |
| 515 | */ |
| 516 | if (!acpi_gbl_root_table_list.count || |
| 517 | !ACPI_COMPARE_NAME(& |
| 518 | (acpi_gbl_root_table_list. |
| 519 | tables[ACPI_TABLE_INDEX_DSDT].signature), |
| 520 | ACPI_SIG_DSDT) |
| 521 | || |
| 522 | ACPI_FAILURE(acpi_tb_verify_table |
| 523 | (&acpi_gbl_root_table_list. |
| 524 | tables[ACPI_TABLE_INDEX_DSDT]))) { |
| 525 | status = AE_NO_ACPI_TABLES; |
| 526 | goto unlock_and_exit; |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * Find DSDT table |
| 531 | */ |
| 532 | status = |
| 533 | acpi_os_table_override(acpi_gbl_root_table_list. |
| 534 | tables[ACPI_TABLE_INDEX_DSDT].pointer, |
| 535 | &table); |
| 536 | if (ACPI_SUCCESS(status) && table) { |
| 537 | /* |
| 538 | * DSDT table has been found |
| 539 | */ |
Bob Moore | 035f994 | 2007-02-02 19:48:24 +0300 | [diff] [blame] | 540 | acpi_tb_delete_table(&acpi_gbl_root_table_list. |
| 541 | tables[ACPI_TABLE_INDEX_DSDT]); |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 542 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer = |
| 543 | table; |
| 544 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length = |
| 545 | table->length; |
| 546 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags = |
| 547 | ACPI_TABLE_ORIGIN_UNKNOWN; |
| 548 | |
| 549 | ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS")); |
| 550 | acpi_tb_print_table_header(0, table); |
Len Brown | 67effe8 | 2007-07-26 00:50:06 -0400 | [diff] [blame] | 551 | |
| 552 | if (no_auto_ssdt == 0) { |
Alistair John Strachan | c21d1e7 | 2008-05-12 19:13:09 +0100 | [diff] [blame] | 553 | printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"\n"); |
Len Brown | 67effe8 | 2007-07-26 00:50:06 -0400 | [diff] [blame] | 554 | } |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | status = |
| 558 | acpi_tb_verify_table(&acpi_gbl_root_table_list. |
| 559 | tables[ACPI_TABLE_INDEX_DSDT]); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 560 | if (ACPI_FAILURE(status)) { |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 561 | |
| 562 | /* A valid DSDT is required */ |
| 563 | |
| 564 | status = AE_NO_ACPI_TABLES; |
| 565 | goto unlock_and_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 568 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 570 | /* |
| 571 | * Load and parse tables. |
| 572 | */ |
| 573 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | if (ACPI_FAILURE(status)) { |
| 575 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | /* |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 579 | * Load any SSDT or PSDT tables. Note: Loop leaves tables locked |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | */ |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 581 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
| 582 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
| 583 | if ((!ACPI_COMPARE_NAME |
| 584 | (&(acpi_gbl_root_table_list.tables[i].signature), |
| 585 | ACPI_SIG_SSDT) |
| 586 | && |
| 587 | !ACPI_COMPARE_NAME(& |
| 588 | (acpi_gbl_root_table_list.tables[i]. |
| 589 | signature), ACPI_SIG_PSDT)) |
| 590 | || |
| 591 | ACPI_FAILURE(acpi_tb_verify_table |
| 592 | (&acpi_gbl_root_table_list.tables[i]))) { |
| 593 | continue; |
| 594 | } |
| 595 | |
Len Brown | 67effe8 | 2007-07-26 00:50:06 -0400 | [diff] [blame] | 596 | if (no_auto_ssdt) { |
| 597 | printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n"); |
| 598 | continue; |
| 599 | } |
| 600 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 601 | /* Ignore errors while loading tables, get as many as possible */ |
| 602 | |
| 603 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
| 604 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); |
| 605 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } |
| 607 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 608 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 610 | unlock_and_exit: |
| 611 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
| 612 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
Bob Moore | f3d2e78 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 615 | /******************************************************************************* |
| 616 | * |
| 617 | * FUNCTION: acpi_load_tables |
| 618 | * |
| 619 | * PARAMETERS: None |
| 620 | * |
| 621 | * RETURN: Status |
| 622 | * |
| 623 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT |
| 624 | * |
| 625 | ******************************************************************************/ |
| 626 | |
| 627 | acpi_status acpi_load_tables(void) |
| 628 | { |
| 629 | acpi_status status; |
| 630 | |
| 631 | ACPI_FUNCTION_TRACE(acpi_load_tables); |
| 632 | |
| 633 | /* |
| 634 | * Load the namespace from the tables |
| 635 | */ |
| 636 | status = acpi_tb_load_namespace(); |
| 637 | if (ACPI_FAILURE(status)) { |
| 638 | ACPI_EXCEPTION((AE_INFO, status, |
| 639 | "While loading namespace from ACPI tables")); |
| 640 | } |
| 641 | |
| 642 | return_ACPI_STATUS(status); |
| 643 | } |
| 644 | |
| 645 | ACPI_EXPORT_SYMBOL(acpi_load_tables) |
Len Brown | 67effe8 | 2007-07-26 00:50:06 -0400 | [diff] [blame] | 646 | |
| 647 | |
Lin Ming | 3e08e2d | 2008-04-10 19:06:38 +0400 | [diff] [blame] | 648 | /******************************************************************************* |
| 649 | * |
| 650 | * FUNCTION: acpi_install_table_handler |
| 651 | * |
| 652 | * PARAMETERS: Handler - Table event handler |
| 653 | * Context - Value passed to the handler on each event |
| 654 | * |
| 655 | * RETURN: Status |
| 656 | * |
| 657 | * DESCRIPTION: Install table event handler |
| 658 | * |
| 659 | ******************************************************************************/ |
| 660 | acpi_status |
| 661 | acpi_install_table_handler(acpi_tbl_handler handler, void *context) |
| 662 | { |
| 663 | acpi_status status; |
| 664 | |
| 665 | ACPI_FUNCTION_TRACE(acpi_install_table_handler); |
| 666 | |
| 667 | if (!handler) { |
| 668 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 669 | } |
| 670 | |
| 671 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 672 | if (ACPI_FAILURE(status)) { |
| 673 | return_ACPI_STATUS(status); |
| 674 | } |
| 675 | |
| 676 | /* Don't allow more than one handler */ |
| 677 | |
| 678 | if (acpi_gbl_table_handler) { |
| 679 | status = AE_ALREADY_EXISTS; |
| 680 | goto cleanup; |
| 681 | } |
| 682 | |
| 683 | /* Install the handler */ |
| 684 | |
| 685 | acpi_gbl_table_handler = handler; |
| 686 | acpi_gbl_table_handler_context = context; |
| 687 | |
| 688 | cleanup: |
| 689 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 690 | return_ACPI_STATUS(status); |
| 691 | } |
| 692 | |
| 693 | ACPI_EXPORT_SYMBOL(acpi_install_table_handler) |
| 694 | |
| 695 | /******************************************************************************* |
| 696 | * |
| 697 | * FUNCTION: acpi_remove_table_handler |
| 698 | * |
| 699 | * PARAMETERS: Handler - Table event handler that was installed |
| 700 | * previously. |
| 701 | * |
| 702 | * RETURN: Status |
| 703 | * |
| 704 | * DESCRIPTION: Remove table event handler |
| 705 | * |
| 706 | ******************************************************************************/ |
| 707 | acpi_status acpi_remove_table_handler(acpi_tbl_handler handler) |
| 708 | { |
| 709 | acpi_status status; |
| 710 | |
| 711 | ACPI_FUNCTION_TRACE(acpi_remove_table_handler); |
| 712 | |
| 713 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 714 | if (ACPI_FAILURE(status)) { |
| 715 | return_ACPI_STATUS(status); |
| 716 | } |
| 717 | |
| 718 | /* Make sure that the installed handler is the same */ |
| 719 | |
| 720 | if (!handler || handler != acpi_gbl_table_handler) { |
| 721 | status = AE_BAD_PARAMETER; |
| 722 | goto cleanup; |
| 723 | } |
| 724 | |
| 725 | /* Remove the handler */ |
| 726 | |
| 727 | acpi_gbl_table_handler = NULL; |
| 728 | |
| 729 | cleanup: |
| 730 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 731 | return_ACPI_STATUS(status); |
| 732 | } |
| 733 | |
| 734 | ACPI_EXPORT_SYMBOL(acpi_remove_table_handler) |
| 735 | |
| 736 | |
Len Brown | 67effe8 | 2007-07-26 00:50:06 -0400 | [diff] [blame] | 737 | static int __init acpi_no_auto_ssdt_setup(char *s) { |
| 738 | |
| 739 | printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n"); |
| 740 | |
| 741 | no_auto_ssdt = 1; |
| 742 | |
| 743 | return 1; |
| 744 | } |
| 745 | |
| 746 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); |