Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 3 | * Module Name: nseval - Object evaluation, includes control method execution |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
David E. Box | 82a8094 | 2015-02-05 15:20:45 +0800 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 45 | #include "accommon.h" |
| 46 | #include "acparser.h" |
| 47 | #include "acinterp.h" |
| 48 | #include "acnamesp.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_NAMESPACE |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("nseval") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 53 | /* Local prototypes */ |
| 54 | static void |
| 55 | acpi_ns_exec_module_code(union acpi_operand_object *method_obj, |
| 56 | struct acpi_evaluate_info *info); |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /******************************************************************************* |
| 59 | * |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 60 | * FUNCTION: acpi_ns_evaluate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | * |
gongzg | 3d2967b | 2015-07-01 14:45:38 +0800 | [diff] [blame] | 62 | * PARAMETERS: info - Evaluation info block, contains these fields |
| 63 | * and more: |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 64 | * prefix_node - Prefix or Method/Object Node to execute |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 65 | * relative_path - Name of method to execute, If NULL, the |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 66 | * Node is the object to execute |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 67 | * parameters - List of parameters to pass to the method, |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 68 | * terminated by NULL. Params itself may be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | * NULL if no parameters are being passed. |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 70 | * parameter_type - Type of Parameter list |
| 71 | * return_object - Where to put method's return value (if |
| 72 | * any). If NULL, no value is returned. |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 73 | * flags - ACPI_IGNORE_RETURN_VALUE to delete return |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | * |
| 75 | * RETURN: Status |
| 76 | * |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 77 | * DESCRIPTION: Execute a control method or return the current value of an |
| 78 | * ACPI namespace object. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | * |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 80 | * MUTEX: Locks interpreter |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | * |
| 82 | ******************************************************************************/ |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 83 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 84 | acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 88 | ACPI_FUNCTION_TRACE(ns_evaluate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | if (!info) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 91 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 94 | if (!info->node) { |
Bob Moore | c34c82b | 2013-04-12 00:24:22 +0000 | [diff] [blame] | 95 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 96 | * Get the actual namespace node for the target object if we |
| 97 | * need to. Handles these cases: |
Bob Moore | c34c82b | 2013-04-12 00:24:22 +0000 | [diff] [blame] | 98 | * |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 99 | * 1) Null node, valid pathname from root (absolute path) |
| 100 | * 2) Node and valid pathname (path relative to Node) |
| 101 | * 3) Node, Null pathname |
Bob Moore | c34c82b | 2013-04-12 00:24:22 +0000 | [diff] [blame] | 102 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 103 | status = |
| 104 | acpi_ns_get_node(info->prefix_node, info->relative_pathname, |
| 105 | ACPI_NS_NO_UPSEARCH, &info->node); |
Bob Moore | c34c82b | 2013-04-12 00:24:22 +0000 | [diff] [blame] | 106 | if (ACPI_FAILURE(status)) { |
| 107 | return_ACPI_STATUS(status); |
| 108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 112 | * For a method alias, we must grab the actual method node so that |
| 113 | * proper scoping context will be established before execution. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 115 | if (acpi_ns_get_type(info->node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) { |
| 116 | info->node = |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 117 | ACPI_CAST_PTR(struct acpi_namespace_node, |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 118 | info->node->object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | } |
| 120 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 121 | /* Complete the info block initialization */ |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 122 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 123 | info->return_object = NULL; |
| 124 | info->node_flags = info->node->flags; |
| 125 | info->obj_desc = acpi_ns_get_attached_object(info->node); |
| 126 | |
| 127 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n", |
| 128 | info->relative_pathname, info->node, |
| 129 | acpi_ns_get_attached_object(info->node))); |
| 130 | |
| 131 | /* Get info if we have a predefined name (_HID, etc.) */ |
| 132 | |
| 133 | info->predefined = |
| 134 | acpi_ut_match_predefined_method(info->node->name.ascii); |
| 135 | |
| 136 | /* Get the full pathname to the object, for use in warning messages */ |
| 137 | |
| 138 | info->full_pathname = acpi_ns_get_external_pathname(info->node); |
| 139 | if (!info->full_pathname) { |
| 140 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 141 | } |
| 142 | |
| 143 | /* Count the number of arguments being passed in */ |
| 144 | |
| 145 | info->param_count = 0; |
| 146 | if (info->parameters) { |
| 147 | while (info->parameters[info->param_count]) { |
| 148 | info->param_count++; |
| 149 | } |
| 150 | |
| 151 | /* Warn on impossible argument count */ |
| 152 | |
| 153 | if (info->param_count > ACPI_METHOD_NUM_ARGS) { |
| 154 | ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, |
| 155 | ACPI_WARN_ALWAYS, |
| 156 | "Excess arguments (%u) - using only %u", |
| 157 | info->param_count, |
| 158 | ACPI_METHOD_NUM_ARGS)); |
| 159 | |
| 160 | info->param_count = ACPI_METHOD_NUM_ARGS; |
| 161 | } |
| 162 | } |
Bob Moore | e8707b3 | 2008-09-28 15:26:17 +0800 | [diff] [blame] | 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 165 | * For predefined names: Check that the declared argument count |
| 166 | * matches the ACPI spec -- otherwise this is a BIOS error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 168 | acpi_ns_check_acpi_compliance(info->full_pathname, info->node, |
| 169 | info->predefined); |
| 170 | |
| 171 | /* |
| 172 | * For all names: Check that the incoming argument count for |
| 173 | * this method/object matches the actual ASL/AML definition. |
| 174 | */ |
| 175 | acpi_ns_check_argument_count(info->full_pathname, info->node, |
| 176 | info->param_count, info->predefined); |
| 177 | |
| 178 | /* For predefined names: Typecheck all incoming arguments */ |
| 179 | |
| 180 | acpi_ns_check_argument_types(info); |
| 181 | |
| 182 | /* |
| 183 | * Three major evaluation cases: |
| 184 | * |
| 185 | * 1) Object types that cannot be evaluated by definition |
| 186 | * 2) The object is a control method -- execute it |
| 187 | * 3) The object is not a method -- just return it's current value |
| 188 | */ |
| 189 | switch (acpi_ns_get_type(info->node)) { |
| 190 | case ACPI_TYPE_DEVICE: |
| 191 | case ACPI_TYPE_EVENT: |
| 192 | case ACPI_TYPE_MUTEX: |
| 193 | case ACPI_TYPE_REGION: |
| 194 | case ACPI_TYPE_THERMAL: |
| 195 | case ACPI_TYPE_LOCAL_SCOPE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 197 | * 1) Disallow evaluation of certain object types. For these, |
| 198 | * object evaluation is undefined and not supported. |
| 199 | */ |
| 200 | ACPI_ERROR((AE_INFO, |
| 201 | "%s: Evaluation of object type [%s] is not supported", |
| 202 | info->full_pathname, |
| 203 | acpi_ut_get_type_name(info->node->type))); |
| 204 | |
| 205 | status = AE_TYPE; |
| 206 | goto cleanup; |
| 207 | |
| 208 | case ACPI_TYPE_METHOD: |
| 209 | /* |
| 210 | * 2) Object is a control method - execute it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | */ |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 212 | |
| 213 | /* Verify that there is a method object associated with this node */ |
| 214 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 215 | if (!info->obj_desc) { |
| 216 | ACPI_ERROR((AE_INFO, |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 217 | "%s: Method has no attached sub-object", |
| 218 | info->full_pathname)); |
| 219 | status = AE_NULL_OBJECT; |
| 220 | goto cleanup; |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 221 | } |
| 222 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 223 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 224 | "**** Execute method [%s] at AML address %p length %X\n", |
| 225 | info->full_pathname, |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 226 | info->obj_desc->method.aml_start + 1, |
| 227 | info->obj_desc->method.aml_length - 1)); |
| 228 | |
| 229 | /* |
| 230 | * Any namespace deletion must acquire both the namespace and |
| 231 | * interpreter locks to ensure that no thread is using the portion of |
| 232 | * the namespace that is being deleted. |
| 233 | * |
| 234 | * Execute the method via the interpreter. The interpreter is locked |
| 235 | * here before calling into the AML parser |
| 236 | */ |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 237 | acpi_ex_enter_interpreter(); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 238 | status = acpi_ps_execute_method(info); |
| 239 | acpi_ex_exit_interpreter(); |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 240 | break; |
| 241 | |
| 242 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 244 | * 3) All other non-method objects -- get the current object value |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 247 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 248 | * Some objects require additional resolution steps (e.g., the Node |
| 249 | * may be a field that must be read, etc.) -- we can't just grab |
| 250 | * the object out of the node. |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 251 | * |
| 252 | * Use resolve_node_to_value() to get the associated value. |
| 253 | * |
| 254 | * NOTE: we can get away with passing in NULL for a walk state because |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 255 | * the Node is guaranteed to not be a reference to either a method |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 256 | * local or a method argument (because this interface is never called |
| 257 | * from a running method.) |
| 258 | * |
| 259 | * Even though we do not directly invoke the interpreter for object |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 260 | * resolution, we must lock it because we could access an op_region. |
| 261 | * The op_region access code assumes that the interpreter is locked. |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 262 | */ |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 263 | acpi_ex_enter_interpreter(); |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 264 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 265 | /* TBD: resolve_node_to_value has a strange interface, fix */ |
| 266 | |
| 267 | info->return_object = |
| 268 | ACPI_CAST_PTR(union acpi_operand_object, info->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 270 | status = |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 271 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR |
| 272 | (struct acpi_namespace_node, |
| 273 | &info->return_object), NULL); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 274 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 276 | if (ACPI_FAILURE(status)) { |
| 277 | goto cleanup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 279 | |
| 280 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "Returned object %p [%s]\n", |
| 281 | info->return_object, |
| 282 | acpi_ut_get_object_type_name(info-> |
| 283 | return_object))); |
| 284 | |
| 285 | status = AE_CTRL_RETURN_VALUE; /* Always has a "return value" */ |
| 286 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Bob Moore | eeb4437 | 2008-11-13 11:19:24 +0800 | [diff] [blame] | 289 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 290 | * For predefined names, check the return value against the ACPI |
| 291 | * specification. Some incorrect return value types are repaired. |
Bob Moore | eeb4437 | 2008-11-13 11:19:24 +0800 | [diff] [blame] | 292 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 293 | (void)acpi_ns_check_return_value(info->node, info, info->param_count, |
| 294 | status, &info->return_object); |
Bob Moore | e8707b3 | 2008-09-28 15:26:17 +0800 | [diff] [blame] | 295 | |
| 296 | /* Check if there is a return value that must be dealt with */ |
| 297 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 298 | if (status == AE_CTRL_RETURN_VALUE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 300 | /* If caller does not want the return value, delete it */ |
| 301 | |
| 302 | if (info->flags & ACPI_IGNORE_RETURN_VALUE) { |
| 303 | acpi_ut_remove_reference(info->return_object); |
| 304 | info->return_object = NULL; |
| 305 | } |
| 306 | |
| 307 | /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ |
| 308 | |
| 309 | status = AE_OK; |
| 310 | } |
| 311 | |
| 312 | ACPI_DEBUG_PRINT((ACPI_DB_NAMES, |
| 313 | "*** Completed evaluation of object %s ***\n", |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 314 | info->relative_pathname)); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 315 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 316 | cleanup: |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 317 | /* |
| 318 | * Namespace was unlocked by the handling acpi_ns* function, so we |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 319 | * just free the pathname and return |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 320 | */ |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 321 | ACPI_FREE(info->full_pathname); |
| 322 | info->full_pathname = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 323 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | } |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 325 | |
| 326 | /******************************************************************************* |
| 327 | * |
| 328 | * FUNCTION: acpi_ns_exec_module_code_list |
| 329 | * |
| 330 | * PARAMETERS: None |
| 331 | * |
| 332 | * RETURN: None. Exceptions during method execution are ignored, since |
| 333 | * we cannot abort a table load. |
| 334 | * |
| 335 | * DESCRIPTION: Execute all elements of the global module-level code list. |
| 336 | * Each element is executed as a single control method. |
| 337 | * |
| 338 | ******************************************************************************/ |
| 339 | |
| 340 | void acpi_ns_exec_module_code_list(void) |
| 341 | { |
| 342 | union acpi_operand_object *prev; |
| 343 | union acpi_operand_object *next; |
| 344 | struct acpi_evaluate_info *info; |
| 345 | u32 method_count = 0; |
| 346 | |
| 347 | ACPI_FUNCTION_TRACE(ns_exec_module_code_list); |
| 348 | |
| 349 | /* Exit now if the list is empty */ |
| 350 | |
| 351 | next = acpi_gbl_module_code_list; |
| 352 | if (!next) { |
| 353 | return_VOID; |
| 354 | } |
| 355 | |
| 356 | /* Allocate the evaluation information block */ |
| 357 | |
| 358 | info = ACPI_ALLOCATE(sizeof(struct acpi_evaluate_info)); |
| 359 | if (!info) { |
| 360 | return_VOID; |
| 361 | } |
| 362 | |
| 363 | /* Walk the list, executing each "method" */ |
| 364 | |
| 365 | while (next) { |
| 366 | prev = next; |
| 367 | next = next->method.mutex; |
| 368 | |
| 369 | /* Clear the link field and execute the method */ |
| 370 | |
| 371 | prev->method.mutex = NULL; |
| 372 | acpi_ns_exec_module_code(prev, info); |
| 373 | method_count++; |
| 374 | |
| 375 | /* Delete the (temporary) method object */ |
| 376 | |
| 377 | acpi_ut_remove_reference(prev); |
| 378 | } |
| 379 | |
| 380 | ACPI_INFO((AE_INFO, |
| 381 | "Executed %u blocks of module-level executable AML code", |
| 382 | method_count)); |
| 383 | |
| 384 | ACPI_FREE(info); |
| 385 | acpi_gbl_module_code_list = NULL; |
| 386 | return_VOID; |
| 387 | } |
| 388 | |
| 389 | /******************************************************************************* |
| 390 | * |
| 391 | * FUNCTION: acpi_ns_exec_module_code |
| 392 | * |
| 393 | * PARAMETERS: method_obj - Object container for the module-level code |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 394 | * info - Info block for method evaluation |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 395 | * |
| 396 | * RETURN: None. Exceptions during method execution are ignored, since |
| 397 | * we cannot abort a table load. |
| 398 | * |
| 399 | * DESCRIPTION: Execute a control method containing a block of module-level |
| 400 | * executable AML code. The control method is temporarily |
| 401 | * installed to the root node, then evaluated. |
| 402 | * |
| 403 | ******************************************************************************/ |
| 404 | |
| 405 | static void |
| 406 | acpi_ns_exec_module_code(union acpi_operand_object *method_obj, |
| 407 | struct acpi_evaluate_info *info) |
| 408 | { |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 409 | union acpi_operand_object *parent_obj; |
| 410 | struct acpi_namespace_node *parent_node; |
| 411 | acpi_object_type type; |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 412 | acpi_status status; |
| 413 | |
| 414 | ACPI_FUNCTION_TRACE(ns_exec_module_code); |
| 415 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 416 | /* |
| 417 | * Get the parent node. We cheat by using the next_object field |
| 418 | * of the method object descriptor. |
| 419 | */ |
| 420 | parent_node = ACPI_CAST_PTR(struct acpi_namespace_node, |
| 421 | method_obj->method.next_object); |
| 422 | type = acpi_ns_get_type(parent_node); |
| 423 | |
Lin Ming | e31c32c | 2009-12-11 15:28:27 +0800 | [diff] [blame] | 424 | /* |
| 425 | * Get the region handler and save it in the method object. We may need |
| 426 | * this if an operation region declaration causes a _REG method to be run. |
| 427 | * |
| 428 | * We can't do this in acpi_ps_link_module_code because |
| 429 | * acpi_gbl_root_node->Object is NULL at PASS1. |
| 430 | */ |
| 431 | if ((type == ACPI_TYPE_DEVICE) && parent_node->object) { |
Lin Ming | 2629484 | 2011-01-12 09:19:43 +0800 | [diff] [blame] | 432 | method_obj->method.dispatch.handler = |
Lin Ming | e31c32c | 2009-12-11 15:28:27 +0800 | [diff] [blame] | 433 | parent_node->object->device.handler; |
| 434 | } |
| 435 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 436 | /* Must clear next_object (acpi_ns_attach_object needs the field) */ |
| 437 | |
| 438 | method_obj->method.next_object = NULL; |
| 439 | |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 440 | /* Initialize the evaluation information block */ |
| 441 | |
Bob Moore | 4fa4616 | 2015-07-01 14:45:11 +0800 | [diff] [blame] | 442 | memset(info, 0, sizeof(struct acpi_evaluate_info)); |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 443 | info->prefix_node = parent_node; |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 444 | |
| 445 | /* |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 446 | * Get the currently attached parent object. Add a reference, because the |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 447 | * ref count will be decreased when the method object is installed to |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 448 | * the parent node. |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 449 | */ |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 450 | parent_obj = acpi_ns_get_attached_object(parent_node); |
| 451 | if (parent_obj) { |
| 452 | acpi_ut_add_reference(parent_obj); |
| 453 | } |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 454 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 455 | /* Install the method (module-level code) in the parent node */ |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 456 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 457 | status = acpi_ns_attach_object(parent_node, method_obj, |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 458 | ACPI_TYPE_METHOD); |
| 459 | if (ACPI_FAILURE(status)) { |
| 460 | goto exit; |
| 461 | } |
| 462 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 463 | /* Execute the parent node as a control method */ |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 464 | |
| 465 | status = acpi_ns_evaluate(info); |
| 466 | |
| 467 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "Executed module-level code at %p\n", |
| 468 | method_obj->method.aml_start)); |
| 469 | |
Lin Ming | 583061c | 2009-12-11 14:36:47 +0800 | [diff] [blame] | 470 | /* Delete a possible implicit return value (in slack mode) */ |
| 471 | |
| 472 | if (info->return_object) { |
| 473 | acpi_ut_remove_reference(info->return_object); |
| 474 | } |
| 475 | |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 476 | /* Detach the temporary method object */ |
| 477 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 478 | acpi_ns_detach_object(parent_node); |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 479 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 480 | /* Restore the original parent object */ |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 481 | |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 482 | if (parent_obj) { |
| 483 | status = acpi_ns_attach_object(parent_node, parent_obj, type); |
| 484 | } else { |
| 485 | parent_node->type = (u8)type; |
| 486 | } |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 487 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 488 | exit: |
Lin Ming | 9a884ab | 2009-11-12 09:57:53 +0800 | [diff] [blame] | 489 | if (parent_obj) { |
| 490 | acpi_ut_remove_reference(parent_obj); |
| 491 | } |
Lin Ming | 7f0c826 | 2009-08-13 14:03:15 +0800 | [diff] [blame] | 492 | return_VOID; |
| 493 | } |