exstore.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:17k
- /******************************************************************************
- *
- * Module Name: exstore - AML Interpreter object store support
- * $Revision: 150 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 R. Byron Moore
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include "acpi.h"
- #include "acparser.h"
- #include "acdispat.h"
- #include "acinterp.h"
- #include "amlcode.h"
- #include "acnamesp.h"
- #include "actables.h"
- #define _COMPONENT ACPI_EXECUTER
- MODULE_NAME ("exstore")
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ex_store
- *
- * PARAMETERS: *Source_desc - Value to be stored
- * *Dest_desc - Where to store it. Must be an NS node
- * or an acpi_operand_object of type
- * Reference;
- *
- * RETURN: Status
- *
- * DESCRIPTION: Store the value described by Source_desc into the location
- * described by Dest_desc. Called by various interpreter
- * functions to store the result of an operation into
- * the destination operand.
- *
- ******************************************************************************/
- acpi_status
- acpi_ex_store (
- acpi_operand_object *source_desc,
- acpi_operand_object *dest_desc,
- acpi_walk_state *walk_state)
- {
- acpi_status status = AE_OK;
- acpi_operand_object *ref_desc = dest_desc;
- FUNCTION_TRACE_PTR ("Ex_store", dest_desc);
- /* Validate parameters */
- if (!source_desc || !dest_desc) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointern"));
- return_ACPI_STATUS (AE_AML_NO_OPERAND);
- }
- /* Dest_desc can be either a namespace node or an ACPI object */
- if (VALID_DESCRIPTOR_TYPE (dest_desc, ACPI_DESC_TYPE_NAMED)) {
- /*
- * Dest is a namespace node,
- * Storing an object into a Name "container"
- */
- status = acpi_ex_store_object_to_node (source_desc,
- (acpi_namespace_node *) dest_desc, walk_state);
- /* All done, that's it */
- return_ACPI_STATUS (status);
- }
- /* Destination object must be an object of type Reference */
- if (dest_desc->common.type != INTERNAL_TYPE_REFERENCE) {
- /* Destination is not an Reference */
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Destination is not a Reference_obj [%p]n", dest_desc));
- DUMP_STACK_ENTRY (source_desc);
- DUMP_STACK_ENTRY (dest_desc);
- DUMP_OPERANDS (&dest_desc, IMODE_EXECUTE, "Ex_store",
- 2, "Target is not a Reference_obj");
- return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
- }
- /*
- * Examine the Reference opcode. These cases are handled:
- *
- * 1) Store to Name (Change the object associated with a name)
- * 2) Store to an indexed area of a Buffer or Package
- * 3) Store to a Method Local or Arg
- * 4) Store to the debug object
- * 5) Store to a constant -- a noop
- */
- switch (ref_desc->reference.opcode) {
- case AML_NAME_OP:
- /* Storing an object into a Name "container" */
- status = acpi_ex_store_object_to_node (source_desc, ref_desc->reference.object,
- walk_state);
- break;
- case AML_INDEX_OP:
- /* Storing to an Index (pointer into a packager or buffer) */
- status = acpi_ex_store_object_to_index (source_desc, ref_desc, walk_state);
- break;
- case AML_LOCAL_OP:
- case AML_ARG_OP:
- /* Store to a method local/arg */
- status = acpi_ds_store_object_to_local (ref_desc->reference.opcode,
- ref_desc->reference.offset, source_desc, walk_state);
- break;
- case AML_DEBUG_OP:
- /*
- * Storing to the Debug object causes the value stored to be
- * displayed and otherwise has no effect -- see ACPI Specification
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Write to Debug Object: ****:nn"));
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %s: ",
- acpi_ut_get_type_name (source_desc->common.type)));
- switch (source_desc->common.type) {
- case ACPI_TYPE_INTEGER:
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "0x%X (%d)n",
- (u32) source_desc->integer.value, (u32) source_desc->integer.value));
- break;
- case ACPI_TYPE_BUFFER:
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "Length 0x%Xn",
- (u32) source_desc->buffer.length));
- break;
- case ACPI_TYPE_STRING:
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "%sn", source_desc->string.pointer));
- break;
- case ACPI_TYPE_PACKAGE:
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "Elements - %pn",
- source_desc->package.elements));
- break;
- default:
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "@0x%pn", source_desc));
- break;
- }
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "n"));
- break;
- case AML_ZERO_OP:
- case AML_ONE_OP:
- case AML_ONES_OP:
- case AML_REVISION_OP:
- /*
- * Storing to a constant is a no-op -- see ACPI Specification
- * Delete the reference descriptor, however
- */
- break;
- default:
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - Unknown Reference subtype %02xn",
- ref_desc->reference.opcode));
- /* TBD: [Restructure] use object dump routine !! */
- DUMP_BUFFER (ref_desc, sizeof (acpi_operand_object));
- status = AE_AML_INTERNAL;
- break;
- } /* switch (Ref_desc->Reference.Opcode) */
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ex_store_object_to_index
- *
- * PARAMETERS: *Source_desc - Value to be stored
- * *Node - Named object to receive the value
- *
- * RETURN: Status
- *
- * DESCRIPTION: Store the object to the named object.
- *
- ******************************************************************************/
- acpi_status
- acpi_ex_store_object_to_index (
- acpi_operand_object *source_desc,
- acpi_operand_object *dest_desc,
- acpi_walk_state *walk_state)
- {
- acpi_status status = AE_OK;
- acpi_operand_object *obj_desc;
- u32 length;
- u32 i;
- u8 value = 0;
- FUNCTION_TRACE ("Ex_store_object_to_index");
- /*
- * Destination must be a reference pointer, and
- * must point to either a buffer or a package
- */
- switch (dest_desc->reference.target_type) {
- case ACPI_TYPE_PACKAGE:
- /*
- * Storing to a package element is not simple. The source must be
- * evaluated and converted to the type of the destination and then the
- * source is copied into the destination - we can't just point to the
- * source object.
- */
- if (dest_desc->reference.target_type == ACPI_TYPE_PACKAGE) {
- /*
- * The object at *(Dest_desc->Reference.Where) is the
- * element within the package that is to be modified.
- */
- obj_desc = *(dest_desc->reference.where);
- if (obj_desc) {
- /*
- * If the Destination element is a package, we will delete
- * that object and construct a new one.
- *
- * TBD: [Investigate] Should both the src and dest be required
- * to be packages?
- * && (Source_desc->Common.Type == ACPI_TYPE_PACKAGE)
- */
- if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
- /* Take away the reference for being part of a package */
- acpi_ut_remove_reference (obj_desc);
- obj_desc = NULL;
- }
- }
- if (!obj_desc) {
- /*
- * If the Obj_desc is NULL, it means that an uninitialized package
- * element has been used as a destination (this is OK), therefore,
- * we must create the destination element to match the type of the
- * source element NOTE: Source_desccan be of any type.
- */
- obj_desc = acpi_ut_create_internal_object (source_desc->common.type);
- if (!obj_desc) {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
- /*
- * If the source is a package, copy the source to the new dest
- */
- if (ACPI_TYPE_PACKAGE == obj_desc->common.type) {
- status = acpi_ut_copy_ipackage_to_ipackage (source_desc, obj_desc, walk_state);
- if (ACPI_FAILURE (status)) {
- acpi_ut_remove_reference (obj_desc);
- return_ACPI_STATUS (status);
- }
- }
- /* Install the new descriptor into the package */
- *(dest_desc->reference.where) = obj_desc;
- }
- if (ACPI_TYPE_PACKAGE != obj_desc->common.type) {
- /*
- * The destination element is not a package, so we need to
- * convert the contents of the source (Source_desc) and copy into
- * the destination (Obj_desc)
- */
- status = acpi_ex_store_object_to_object (source_desc, obj_desc,
- walk_state);
- if (ACPI_FAILURE (status)) {
- /*
- * An error occurrered when copying the internal object
- * so delete the reference.
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Unable to copy the internal objectn"));
- return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
- }
- }
- }
- break;
- case ACPI_TYPE_BUFFER_FIELD:
- /* TBD: can probably call the generic Buffer/Field routines */
- /*
- * Storing into a buffer at a location defined by an Index.
- *
- * Each 8-bit element of the source object is written to the
- * 8-bit Buffer Field of the Index destination object.
- */
- /*
- * Set the Obj_desc to the destination object and type check.
- */
- obj_desc = dest_desc->reference.object;
- if (obj_desc->common.type != ACPI_TYPE_BUFFER) {
- return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
- }
- /*
- * The assignment of the individual elements will be slightly
- * different for each source type.
- */
- switch (source_desc->common.type) {
- case ACPI_TYPE_INTEGER:
- /*
- * Type is Integer, assign bytewise
- * This loop to assign each of the elements is somewhat
- * backward because of the Big Endian-ness of IA-64
- */
- length = sizeof (acpi_integer);
- for (i = length; i != 0; i--) {
- value = (u8)(source_desc->integer.value >> (MUL_8 (i - 1)));
- obj_desc->buffer.pointer[dest_desc->reference.offset] = value;
- }
- break;
- case ACPI_TYPE_BUFFER:
- /*
- * Type is Buffer, the Length is in the structure.
- * Just loop through the elements and assign each one in turn.
- */
- length = source_desc->buffer.length;
- for (i = 0; i < length; i++) {
- value = source_desc->buffer.pointer[i];
- obj_desc->buffer.pointer[dest_desc->reference.offset] = value;
- }
- break;
- case ACPI_TYPE_STRING:
- /*
- * Type is String, the Length is in the structure.
- * Just loop through the elements and assign each one in turn.
- */
- length = source_desc->string.length;
- for (i = 0; i < length; i++) {
- value = source_desc->string.pointer[i];
- obj_desc->buffer.pointer[dest_desc->reference.offset] = value;
- }
- break;
- default:
- /* Other types are invalid */
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Source must be Number/Buffer/String type, not %Xn",
- source_desc->common.type));
- status = AE_AML_OPERAND_TYPE;
- break;
- }
- break;
- default:
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Target is not a Package or Buffer_fieldn"));
- status = AE_AML_OPERAND_TYPE;
- break;
- }
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ex_store_object_to_node
- *
- * PARAMETERS: *Source_desc - Value to be stored
- * *Node - Named object to receive the value
- *
- * RETURN: Status
- *
- * DESCRIPTION: Store the object to the named object.
- *
- * The Assignment of an object to a named object is handled here
- * The val passed in will replace the current value (if any)
- * with the input value.
- *
- * When storing into an object the data is converted to the
- * target object type then stored in the object. This means
- * that the target object type (for an initialized target) will
- * not be changed by a store operation.
- *
- * NOTE: the global lock is acquired early. This will result
- * in the global lock being held a bit longer. Also, if the
- * function fails during set up we may get the lock when we
- * don't really need it. I don't think we care.
- *
- ******************************************************************************/
- acpi_status
- acpi_ex_store_object_to_node (
- acpi_operand_object *source_desc,
- acpi_namespace_node *node,
- acpi_walk_state *walk_state)
- {
- acpi_status status = AE_OK;
- acpi_operand_object *target_desc;
- acpi_object_type8 target_type = ACPI_TYPE_ANY;
- FUNCTION_TRACE ("Ex_store_object_to_node");
- /*
- * Assuming the parameters were already validated
- */
- /*
- * Get current type of the node, and object attached to Node
- */
- target_type = acpi_ns_get_type (node);
- target_desc = acpi_ns_get_attached_object (node);
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Storing %p(%s) into node %p(%s)n",
- node, acpi_ut_get_type_name (source_desc->common.type),
- source_desc, acpi_ut_get_type_name (target_type)));
- /*
- * Resolve the source object to an actual value
- * (If it is a reference object)
- */
- status = acpi_ex_resolve_object (&source_desc, target_type, walk_state);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
- /*
- * Do the actual store operation
- */
- switch (target_type) {
- case ACPI_TYPE_BUFFER_FIELD:
- case INTERNAL_TYPE_REGION_FIELD:
- case INTERNAL_TYPE_BANK_FIELD:
- case INTERNAL_TYPE_INDEX_FIELD:
- /*
- * For fields, copy the source data to the target field.
- */
- status = acpi_ex_write_data_to_field (source_desc, target_desc);
- break;
- case ACPI_TYPE_INTEGER:
- case ACPI_TYPE_STRING:
- case ACPI_TYPE_BUFFER:
- /*
- * These target types are all of type Integer/String/Buffer, and
- * therefore support implicit conversion before the store.
- *
- * Copy and/or convert the source object to a new target object
- */
- status = acpi_ex_store_object (source_desc, target_type, &target_desc, walk_state);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
- /*
- * Store the new Target_desc as the new value of the Name, and set
- * the Name's type to that of the value being stored in it.
- * Source_desc reference count is incremented by Attach_object.
- */
- status = acpi_ns_attach_object (node, target_desc, target_type);
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Store %s into %s via Convert/Attachn",
- acpi_ut_get_type_name (target_desc->common.type),
- acpi_ut_get_type_name (target_type)));
- break;
- default:
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Storing %s (%p) directly into node (%p), no implicit conversionn",
- acpi_ut_get_type_name (source_desc->common.type), source_desc, node));
- /* No conversions for all other types. Just attach the source object */
- status = acpi_ns_attach_object (node, source_desc, source_desc->common.type);
- break;
- }
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ex_store_object_to_object
- *
- * PARAMETERS: *Source_desc - Value to be stored
- * *Dest_desc - Object to receive the value
- *
- * RETURN: Status
- *
- * DESCRIPTION: Store an object to another object.
- *
- * The Assignment of an object to another (not named) object
- * is handled here.
- * The val passed in will replace the current value (if any)
- * with the input value.
- *
- * When storing into an object the data is converted to the
- * target object type then stored in the object. This means
- * that the target object type (for an initialized target) will
- * not be changed by a store operation.
- *
- * This module allows destination types of Number, String,
- * and Buffer.
- *
- ******************************************************************************/
- acpi_status
- acpi_ex_store_object_to_object (
- acpi_operand_object *source_desc,
- acpi_operand_object *dest_desc,
- acpi_walk_state *walk_state)
- {
- acpi_status status = AE_OK;
- acpi_object_type8 destination_type = dest_desc->common.type;
- FUNCTION_TRACE ("Ex_store_object_to_object");
- /*
- * Assuming the parameters are valid!
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Storing %p(%s) to %p(%s)n",
- source_desc, acpi_ut_get_type_name (source_desc->common.type),
- dest_desc, acpi_ut_get_type_name (dest_desc->common.type)));
- /*
- * From this interface, we only support Integers/Strings/Buffers
- */
- switch (destination_type) {
- case ACPI_TYPE_INTEGER:
- case ACPI_TYPE_STRING:
- case ACPI_TYPE_BUFFER:
- break;
- default:
- ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into %s not implementedn",
- acpi_ut_get_type_name (dest_desc->common.type)));
- return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
- }
- /*
- * Resolve the source object to an actual value
- * (If it is a reference object)
- */
- status = acpi_ex_resolve_object (&source_desc, destination_type, walk_state);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
- /*
- * Copy and/or convert the source object to the destination object
- */
- status = acpi_ex_store_object (source_desc, destination_type, &dest_desc, walk_state);
- return_ACPI_STATUS (status);
- }