Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: exresolv - AML Interpreter object resolution |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | c8100dc | 2016-01-15 08:17:03 +0800 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2016, 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 "amlcode.h" |
| 47 | #include "acdispat.h" |
| 48 | #include "acinterp.h" |
| 49 | #include "acnamesp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #define _COMPONENT ACPI_EXECUTER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 52 | ACPI_MODULE_NAME("exresolv") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 54 | /* Local prototypes */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 56 | acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr, |
| 57 | struct acpi_walk_state *walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | /******************************************************************************* |
| 60 | * |
| 61 | * FUNCTION: acpi_ex_resolve_to_value |
| 62 | * |
| 63 | * PARAMETERS: **stack_ptr - Points to entry on obj_stack, which can |
| 64 | * be either an (union acpi_operand_object *) |
| 65 | * or an acpi_handle. |
| 66 | * walk_state - Current method state |
| 67 | * |
| 68 | * RETURN: Status |
| 69 | * |
| 70 | * DESCRIPTION: Convert Reference objects to values |
| 71 | * |
| 72 | ******************************************************************************/ |
| 73 | |
| 74 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 75 | acpi_ex_resolve_to_value(union acpi_operand_object **stack_ptr, |
| 76 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 78 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 80 | ACPI_FUNCTION_TRACE_PTR(ex_resolve_to_value, stack_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | if (!stack_ptr || !*stack_ptr) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 83 | ACPI_ERROR((AE_INFO, "Internal - null pointer")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | /* |
| 88 | * The entity pointed to by the stack_ptr can be either |
| 89 | * 1) A valid union acpi_operand_object, or |
| 90 | * 2) A struct acpi_namespace_node (named_obj) |
| 91 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_OPERAND) { |
| 93 | status = acpi_ex_resolve_object_to_value(stack_ptr, walk_state); |
| 94 | if (ACPI_FAILURE(status)) { |
| 95 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 97 | |
| 98 | if (!*stack_ptr) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 99 | ACPI_ERROR((AE_INFO, "Internal - null pointer")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 101 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Object on the stack may have changed if acpi_ex_resolve_object_to_value() |
| 106 | * was called (i.e., we can't use an _else_ here.) |
| 107 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 108 | if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_NAMED) { |
| 109 | status = |
| 110 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR |
| 111 | (struct acpi_namespace_node, |
| 112 | stack_ptr), walk_state); |
| 113 | if (ACPI_FAILURE(status)) { |
| 114 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | } |
| 117 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 118 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr)); |
| 119 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | /******************************************************************************* |
| 123 | * |
| 124 | * FUNCTION: acpi_ex_resolve_object_to_value |
| 125 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 126 | * PARAMETERS: stack_ptr - Pointer to an internal object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | * walk_state - Current method state |
| 128 | * |
| 129 | * RETURN: Status |
| 130 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 131 | * DESCRIPTION: Retrieve the value from an internal object. The Reference type |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | * uses the associated AML opcode to determine the value. |
| 133 | * |
| 134 | ******************************************************************************/ |
| 135 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 136 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 137 | acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr, |
| 138 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 140 | acpi_status status = AE_OK; |
| 141 | union acpi_operand_object *stack_desc; |
Fiodor Suietov | 65e4b9b | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 142 | union acpi_operand_object *obj_desc = NULL; |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 143 | u8 ref_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 145 | ACPI_FUNCTION_TRACE(ex_resolve_object_to_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | stack_desc = *stack_ptr; |
| 148 | |
Bob Moore | cf48958 | 2012-07-16 09:52:27 +0800 | [diff] [blame] | 149 | /* This is an object of type union acpi_operand_object */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 151 | switch (stack_desc->common.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 153 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 154 | ref_type = stack_desc->reference.class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 156 | switch (ref_type) { |
| 157 | case ACPI_REFCLASS_LOCAL: |
| 158 | case ACPI_REFCLASS_ARG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | /* |
| 160 | * Get the local from the method's state info |
| 161 | * Note: this increments the local's object reference count |
| 162 | */ |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 163 | status = acpi_ds_method_data_get_value(ref_type, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | stack_desc-> |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 165 | reference.value, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 166 | walk_state, |
| 167 | &obj_desc); |
| 168 | if (ACPI_FAILURE(status)) { |
| 169 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | } |
| 171 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 172 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 173 | "[Arg/Local %X] ValueObj is %p\n", |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 174 | stack_desc->reference.value, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | obj_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
| 177 | /* |
| 178 | * Now we can delete the original Reference Object and |
| 179 | * replace it with the resolved value |
| 180 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 181 | acpi_ut_remove_reference(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | *stack_ptr = obj_desc; |
| 183 | break; |
| 184 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 185 | case ACPI_REFCLASS_INDEX: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | switch (stack_desc->reference.target_type) { |
| 188 | case ACPI_TYPE_BUFFER_FIELD: |
| 189 | |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 190 | /* Just return - do not dereference */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | break; |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | case ACPI_TYPE_PACKAGE: |
| 194 | |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 195 | /* If method call or copy_object - do not dereference */ |
Lin Ming | e5bcc81 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 196 | |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 197 | if ((walk_state->opcode == |
| 198 | AML_INT_METHODCALL_OP) |
| 199 | || (walk_state->opcode == AML_COPY_OP)) { |
Lin Ming | e5bcc81 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 200 | break; |
| 201 | } |
| 202 | |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 203 | /* Otherwise, dereference the package_index to a package element */ |
| 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | obj_desc = *stack_desc->reference.where; |
| 206 | if (obj_desc) { |
| 207 | /* |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 208 | * Valid object descriptor, copy pointer to return value |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | * (i.e., dereference the package index) |
| 210 | * Delete the ref object, increment the returned object |
| 211 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 212 | acpi_ut_add_reference(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | *stack_ptr = obj_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 214 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | /* |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 216 | * A NULL object descriptor means an uninitialized element of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | * the package, can't dereference it |
| 218 | */ |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 219 | ACPI_ERROR((AE_INFO, |
Bob Moore | 1fad873 | 2015-12-29 13:54:36 +0800 | [diff] [blame] | 220 | "Attempt to dereference an Index to " |
| 221 | "NULL package element Idx=%p", |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 222 | stack_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | status = AE_AML_UNINITIALIZED_ELEMENT; |
| 224 | } |
| 225 | break; |
| 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | default: |
| 228 | |
| 229 | /* Invalid reference object */ |
| 230 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 231 | ACPI_ERROR((AE_INFO, |
Bob Moore | f6a22b0 | 2010-03-05 17:56:40 +0800 | [diff] [blame] | 232 | "Unknown TargetType 0x%X in Index/Reference object %p", |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 233 | stack_desc->reference.target_type, |
| 234 | stack_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | status = AE_AML_INTERNAL; |
| 236 | break; |
| 237 | } |
| 238 | break; |
| 239 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 240 | case ACPI_REFCLASS_REFOF: |
| 241 | case ACPI_REFCLASS_DEBUG: |
| 242 | case ACPI_REFCLASS_TABLE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Lin Ming | 1cb2ef6 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 244 | /* Just leave the object as-is, do not dereference */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | break; |
| 247 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 248 | case ACPI_REFCLASS_NAME: /* Reference to a named object */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 249 | |
Bob Moore | 4c90ece | 2006-06-08 16:29:00 -0400 | [diff] [blame] | 250 | /* Dereference the name */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 251 | |
Bob Moore | 4c90ece | 2006-06-08 16:29:00 -0400 | [diff] [blame] | 252 | if ((stack_desc->reference.node->type == |
| 253 | ACPI_TYPE_DEVICE) |
| 254 | || (stack_desc->reference.node->type == |
| 255 | ACPI_TYPE_THERMAL)) { |
| 256 | |
| 257 | /* These node types do not have 'real' subobjects */ |
| 258 | |
| 259 | *stack_ptr = (void *)stack_desc->reference.node; |
| 260 | } else { |
| 261 | /* Get the object pointed to by the namespace node */ |
| 262 | |
| 263 | *stack_ptr = |
| 264 | (stack_desc->reference.node)->object; |
| 265 | acpi_ut_add_reference(*stack_ptr); |
| 266 | } |
| 267 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 268 | acpi_ut_remove_reference(stack_desc); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 269 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | default: |
| 272 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 273 | ACPI_ERROR((AE_INFO, |
Bob Moore | f6a22b0 | 2010-03-05 17:56:40 +0800 | [diff] [blame] | 274 | "Unknown Reference type 0x%X in %p", |
| 275 | ref_type, stack_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | status = AE_AML_INTERNAL; |
| 277 | break; |
| 278 | } |
| 279 | break; |
| 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | case ACPI_TYPE_BUFFER: |
| 282 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 283 | status = acpi_ds_get_buffer_arguments(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | break; |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | case ACPI_TYPE_PACKAGE: |
| 287 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 288 | status = acpi_ds_get_package_arguments(stack_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | break; |
| 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | case ACPI_TYPE_BUFFER_FIELD: |
| 292 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 293 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 294 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 295 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 296 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 297 | "FieldRead SourceDesc=%p Type=%X\n", |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 298 | stack_desc, stack_desc->common.type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 300 | status = |
| 301 | acpi_ex_read_data_from_field(walk_state, stack_desc, |
| 302 | &obj_desc); |
Fiodor Suietov | 65e4b9b | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 303 | |
| 304 | /* Remove a reference to the original operand, then override */ |
| 305 | |
| 306 | acpi_ut_remove_reference(*stack_ptr); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 307 | *stack_ptr = (void *)obj_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | break; |
| 309 | |
| 310 | default: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | break; |
| 313 | } |
| 314 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 315 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | /******************************************************************************* |
| 319 | * |
| 320 | * FUNCTION: acpi_ex_resolve_multiple |
| 321 | * |
| 322 | * PARAMETERS: walk_state - Current state (contains AML opcode) |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 323 | * operand - Starting point for resolution |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | * return_type - Where the object type is returned |
| 325 | * return_desc - Where the resolved object is returned |
| 326 | * |
| 327 | * RETURN: Status |
| 328 | * |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 329 | * DESCRIPTION: Return the base object and type. Traverse a reference list if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | * necessary to get to the base object. |
| 331 | * |
| 332 | ******************************************************************************/ |
| 333 | |
| 334 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 335 | acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state, |
| 336 | union acpi_operand_object *operand, |
| 337 | acpi_object_type * return_type, |
| 338 | union acpi_operand_object **return_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
Bob Moore | 4712f71 | 2015-08-25 10:28:26 +0800 | [diff] [blame] | 340 | union acpi_operand_object *obj_desc = ACPI_CAST_PTR(void, operand); |
| 341 | struct acpi_namespace_node *node = |
| 342 | ACPI_CAST_PTR(struct acpi_namespace_node, operand); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 343 | acpi_object_type type; |
| 344 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 346 | ACPI_FUNCTION_TRACE(acpi_ex_resolve_multiple); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 348 | /* Operand can be either a namespace node or an operand descriptor */ |
| 349 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 350 | switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | case ACPI_DESC_TYPE_OPERAND: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | type = obj_desc->common.type; |
| 354 | break; |
| 355 | |
| 356 | case ACPI_DESC_TYPE_NAMED: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 357 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 358 | type = ((struct acpi_namespace_node *)obj_desc)->type; |
Bob Moore | 4712f71 | 2015-08-25 10:28:26 +0800 | [diff] [blame] | 359 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | /* If we had an Alias node, use the attached object for type info */ |
| 362 | |
| 363 | if (type == ACPI_TYPE_LOCAL_ALIAS) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 364 | type = ((struct acpi_namespace_node *)obj_desc)->type; |
Bob Moore | 1fad873 | 2015-12-29 13:54:36 +0800 | [diff] [blame] | 365 | obj_desc = acpi_ns_get_attached_object((struct |
| 366 | acpi_namespace_node |
| 367 | *)obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
Bob Moore | 4712f71 | 2015-08-25 10:28:26 +0800 | [diff] [blame] | 369 | |
| 370 | if (!obj_desc) { |
| 371 | ACPI_ERROR((AE_INFO, |
| 372 | "[%4.4s] Node is unresolved or uninitialized", |
| 373 | acpi_ut_get_node_name(node))); |
| 374 | return_ACPI_STATUS(AE_AML_UNINITIALIZED_NODE); |
| 375 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | break; |
| 377 | |
| 378 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 379 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 382 | /* If type is anything other than a reference, we are done */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | if (type != ACPI_TYPE_LOCAL_REFERENCE) { |
| 385 | goto exit; |
| 386 | } |
| 387 | |
| 388 | /* |
Lin Ming | bc7a36a | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 389 | * For reference objects created via the ref_of, Index, or Load/load_table |
| 390 | * operators, we need to get to the base object (as per the ACPI |
| 391 | * specification of the object_type and size_of operators). This means |
| 392 | * traversing the list of possibly many nested references. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 394 | while (obj_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) { |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 395 | switch (obj_desc->reference.class) { |
| 396 | case ACPI_REFCLASS_REFOF: |
| 397 | case ACPI_REFCLASS_NAME: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | /* Dereference the reference pointer */ |
| 400 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 401 | if (obj_desc->reference.class == ACPI_REFCLASS_REFOF) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 402 | node = obj_desc->reference.object; |
| 403 | } else { /* AML_INT_NAMEPATH_OP */ |
| 404 | |
| 405 | node = obj_desc->reference.node; |
| 406 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | /* All "References" point to a NS node */ |
| 409 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 410 | if (ACPI_GET_DESCRIPTOR_TYPE(node) != |
| 411 | ACPI_DESC_TYPE_NAMED) { |
Bob Moore | f6a22b0 | 2010-03-05 17:56:40 +0800 | [diff] [blame] | 412 | ACPI_ERROR((AE_INFO, |
| 413 | "Not a namespace node %p [%s]", |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 414 | node, |
| 415 | acpi_ut_get_descriptor_name(node))); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | return_ACPI_STATUS(AE_AML_INTERNAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | /* Get the attached object */ |
| 420 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 421 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | if (!obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | /* No object, use the NS node type */ |
| 425 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 426 | type = acpi_ns_get_type(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | goto exit; |
| 428 | } |
| 429 | |
| 430 | /* Check for circular references */ |
| 431 | |
| 432 | if (obj_desc == operand) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 433 | return_ACPI_STATUS(AE_AML_CIRCULAR_REFERENCE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
| 435 | break; |
| 436 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 437 | case ACPI_REFCLASS_INDEX: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
| 439 | /* Get the type of this reference (index into another object) */ |
| 440 | |
| 441 | type = obj_desc->reference.target_type; |
| 442 | if (type != ACPI_TYPE_PACKAGE) { |
| 443 | goto exit; |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * The main object is a package, we want to get the type |
| 448 | * of the individual package element that is referenced by |
| 449 | * the index. |
| 450 | * |
| 451 | * This could of course in turn be another reference object. |
| 452 | */ |
| 453 | obj_desc = *(obj_desc->reference.where); |
| 454 | if (!obj_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | /* NULL package elements are allowed */ |
| 457 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 458 | type = 0; /* Uninitialized */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | goto exit; |
| 460 | } |
| 461 | break; |
| 462 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 463 | case ACPI_REFCLASS_TABLE: |
Lin Ming | bc7a36a | 2008-04-10 19:06:42 +0400 | [diff] [blame] | 464 | |
| 465 | type = ACPI_TYPE_DDB_HANDLE; |
| 466 | goto exit; |
| 467 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 468 | case ACPI_REFCLASS_LOCAL: |
| 469 | case ACPI_REFCLASS_ARG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
| 471 | if (return_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 472 | status = |
| 473 | acpi_ds_method_data_get_value(obj_desc-> |
| 474 | reference. |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 475 | class, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 476 | obj_desc-> |
| 477 | reference. |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 478 | value, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 479 | walk_state, |
| 480 | &obj_desc); |
| 481 | if (ACPI_FAILURE(status)) { |
| 482 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 484 | acpi_ut_remove_reference(obj_desc); |
| 485 | } else { |
| 486 | status = |
| 487 | acpi_ds_method_data_get_node(obj_desc-> |
| 488 | reference. |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 489 | class, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 490 | obj_desc-> |
| 491 | reference. |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 492 | value, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 493 | walk_state, |
| 494 | &node); |
| 495 | if (ACPI_FAILURE(status)) { |
| 496 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 499 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | if (!obj_desc) { |
| 501 | type = ACPI_TYPE_ANY; |
| 502 | goto exit; |
| 503 | } |
| 504 | } |
| 505 | break; |
| 506 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 507 | case ACPI_REFCLASS_DEBUG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 509 | /* The Debug Object is of type "DebugObject" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
| 511 | type = ACPI_TYPE_DEBUG_OBJECT; |
| 512 | goto exit; |
| 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | default: |
| 515 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 516 | ACPI_ERROR((AE_INFO, |
Bob Moore | f6a22b0 | 2010-03-05 17:56:40 +0800 | [diff] [blame] | 517 | "Unknown Reference Class 0x%2.2X", |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 518 | obj_desc->reference.class)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 519 | return_ACPI_STATUS(AE_AML_INTERNAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * Now we are guaranteed to have an object that has not been created |
| 525 | * via the ref_of or Index operators. |
| 526 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 527 | type = obj_desc->common.type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 529 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | /* Convert internal types to external types */ |
| 531 | |
| 532 | switch (type) { |
| 533 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 534 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 535 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 536 | |
| 537 | type = ACPI_TYPE_FIELD_UNIT; |
| 538 | break; |
| 539 | |
| 540 | case ACPI_TYPE_LOCAL_SCOPE: |
| 541 | |
| 542 | /* Per ACPI Specification, Scope is untyped */ |
| 543 | |
| 544 | type = ACPI_TYPE_ANY; |
| 545 | break; |
| 546 | |
| 547 | default: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | /* No change to Type required */ |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | break; |
| 552 | } |
| 553 | |
| 554 | *return_type = type; |
| 555 | if (return_desc) { |
| 556 | *return_desc = obj_desc; |
| 557 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 558 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |