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Diffstat (limited to 'drivers/acpi/dispatcher/dsobject.c')
| -rw-r--r-- | drivers/acpi/dispatcher/dsobject.c | 618 |
1 files changed, 618 insertions, 0 deletions
diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c new file mode 100644 index 000000000000..eb8af4785bcb --- /dev/null +++ b/drivers/acpi/dispatcher/dsobject.c @@ -0,0 +1,618 @@ +/****************************************************************************** + * + * Module Name: dsobject - Dispatcher object management routines + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acnamesp.h> +#include <acpi/acinterp.h> + +#define _COMPONENT ACPI_DISPATCHER + ACPI_MODULE_NAME ("dsobject") + + +#ifndef ACPI_NO_METHOD_EXECUTION +/***************************************************************************** + * + * FUNCTION: acpi_ds_build_internal_object + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser object to be translated + * obj_desc_ptr - Where the ACPI internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Translate a parser Op object to the equivalent namespace object + * Simple objects are any objects other than a package object! + * + ****************************************************************************/ + +acpi_status +acpi_ds_build_internal_object ( + struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + union acpi_operand_object **obj_desc_ptr) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("ds_build_internal_object"); + + + *obj_desc_ptr = NULL; + if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { + /* + * This is an named object reference. If this name was + * previously looked up in the namespace, it was stored in this op. + * Otherwise, go ahead and look it up now + */ + if (!op->common.node) { + status = acpi_ns_lookup (walk_state->scope_info, op->common.value.string, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, + (struct acpi_namespace_node **) &(op->common.node)); + + if (ACPI_FAILURE (status)) { + ACPI_REPORT_NSERROR (op->common.value.string, status); + return_ACPI_STATUS (status); + } + } + } + + /* Create and init the internal ACPI object */ + + obj_desc = acpi_ut_create_internal_object ((acpi_ps_get_opcode_info (op->common.aml_opcode))->object_type); + if (!obj_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + status = acpi_ds_init_object_from_op (walk_state, op, op->common.aml_opcode, &obj_desc); + if (ACPI_FAILURE (status)) { + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); + } + + *obj_desc_ptr = obj_desc; + return_ACPI_STATUS (AE_OK); +} + + +/***************************************************************************** + * + * FUNCTION: acpi_ds_build_internal_buffer_obj + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser object to be translated + * buffer_length - Length of the buffer + * obj_desc_ptr - Where the ACPI internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Translate a parser Op package object to the equivalent + * namespace object + * + ****************************************************************************/ + +acpi_status +acpi_ds_build_internal_buffer_obj ( + struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + u32 buffer_length, + union acpi_operand_object **obj_desc_ptr) +{ + union acpi_parse_object *arg; + union acpi_operand_object *obj_desc; + union acpi_parse_object *byte_list; + u32 byte_list_length = 0; + + + ACPI_FUNCTION_TRACE ("ds_build_internal_buffer_obj"); + + + obj_desc = *obj_desc_ptr; + if (obj_desc) { + /* + * We are evaluating a Named buffer object "Name (xxxx, Buffer)". + * The buffer object already exists (from the NS node) + */ + } + else { + /* Create a new buffer object */ + + obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER); + *obj_desc_ptr = obj_desc; + if (!obj_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + } + + /* + * Second arg is the buffer data (optional) byte_list can be either + * individual bytes or a string initializer. In either case, a + * byte_list appears in the AML. + */ + arg = op->common.value.arg; /* skip first arg */ + + byte_list = arg->named.next; + if (byte_list) { + if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Expecting bytelist, got AML opcode %X in op %p\n", + byte_list->common.aml_opcode, byte_list)); + + acpi_ut_remove_reference (obj_desc); + return (AE_TYPE); + } + + byte_list_length = (u32) byte_list->common.value.integer; + } + + /* + * The buffer length (number of bytes) will be the larger of: + * 1) The specified buffer length and + * 2) The length of the initializer byte list + */ + obj_desc->buffer.length = buffer_length; + if (byte_list_length > buffer_length) { + obj_desc->buffer.length = byte_list_length; + } + + /* Allocate the buffer */ + + if (obj_desc->buffer.length == 0) { + obj_desc->buffer.pointer = NULL; + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Buffer defined with zero length in AML, creating\n")); + } + else { + obj_desc->buffer.pointer = ACPI_MEM_CALLOCATE ( + obj_desc->buffer.length); + if (!obj_desc->buffer.pointer) { + acpi_ut_delete_object_desc (obj_desc); + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Initialize buffer from the byte_list (if present) */ + + if (byte_list) { + ACPI_MEMCPY (obj_desc->buffer.pointer, byte_list->named.data, + byte_list_length); + } + } + + obj_desc->buffer.flags |= AOPOBJ_DATA_VALID; + op->common.node = (struct acpi_namespace_node *) obj_desc; + return_ACPI_STATUS (AE_OK); +} + + +/***************************************************************************** + * + * FUNCTION: acpi_ds_build_internal_package_obj + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser object to be translated + * package_length - Number of elements in the package + * obj_desc_ptr - Where the ACPI internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Translate a parser Op package object to the equivalent + * namespace object + * + ****************************************************************************/ + +acpi_status +acpi_ds_build_internal_package_obj ( + struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + u32 package_length, + union acpi_operand_object **obj_desc_ptr) +{ + union acpi_parse_object *arg; + union acpi_parse_object *parent; + union acpi_operand_object *obj_desc = NULL; + u32 package_list_length; + acpi_status status = AE_OK; + u32 i; + + + ACPI_FUNCTION_TRACE ("ds_build_internal_package_obj"); + + + /* Find the parent of a possibly nested package */ + + parent = op->common.parent; + while ((parent->common.aml_opcode == AML_PACKAGE_OP) || + (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { + parent = parent->common.parent; + } + + obj_desc = *obj_desc_ptr; + if (obj_desc) { + /* + * We are evaluating a Named package object "Name (xxxx, Package)". + * Get the existing package object from the NS node + */ + } + else { + obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE); + *obj_desc_ptr = obj_desc; + if (!obj_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + obj_desc->package.node = parent->common.node; + } + + obj_desc->package.count = package_length; + + /* Count the number of items in the package list */ + + package_list_length = 0; + arg = op->common.value.arg; + arg = arg->common.next; + while (arg) { + package_list_length++; + arg = arg->common.next; + } + + /* + * The package length (number of elements) will be the greater + * of the specified length and the length of the initializer list + */ + if (package_list_length > package_length) { + obj_desc->package.count = package_list_length; + } + + /* + * Allocate the pointer array (array of pointers to the + * individual objects). Add an extra pointer slot so + * that the list is always null terminated. + */ + obj_desc->package.elements = ACPI_MEM_CALLOCATE ( + ((acpi_size) obj_desc->package.count + 1) * sizeof (void *)); + + if (!obj_desc->package.elements) { + acpi_ut_delete_object_desc (obj_desc); + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* + * Now init the elements of the package + */ + i = 0; + arg = op->common.value.arg; + arg = arg->common.next; + while (arg) { + if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { + /* Object (package or buffer) is already built */ + + obj_desc->package.elements[i] = ACPI_CAST_PTR (union acpi_operand_object, arg->common.node); + } + else { + status = acpi_ds_build_internal_object (walk_state, arg, + &obj_desc->package.elements[i]); + } + + i++; + arg = arg->common.next; + } + + obj_desc->package.flags |= AOPOBJ_DATA_VALID; + op->common.node = (struct acpi_namespace_node *) obj_desc; + return_ACPI_STATUS (status); +} + + +/***************************************************************************** + * + * FUNCTION: acpi_ds_create_node + * + * PARAMETERS: walk_state - Current walk state + * Node - NS Node to be initialized + * Op - Parser object to be translated + * + * RETURN: Status + * + * DESCRIPTION: Create the object to be associated with a namespace node + * + ****************************************************************************/ + +acpi_status +acpi_ds_create_node ( + struct acpi_walk_state *walk_state, + struct acpi_namespace_node *node, + union acpi_parse_object *op) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + + + ACPI_FUNCTION_TRACE_PTR ("ds_create_node", op); + + + /* + * Because of the execution pass through the non-control-method + * parts of the table, we can arrive here twice. Only init + * the named object node the first time through + */ + if (acpi_ns_get_attached_object (node)) { + return_ACPI_STATUS (AE_OK); + } + + if (!op->common.value.arg) { + /* No arguments, there is nothing to do */ + + return_ACPI_STATUS (AE_OK); + } + + /* Build an internal object for the argument(s) */ + + status = acpi_ds_build_internal_object (walk_state, op->common.value.arg, &obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Re-type the object according to its argument */ + + node->type = ACPI_GET_OBJECT_TYPE (obj_desc); + + /* Attach obj to node */ + + status = acpi_ns_attach_object (node, obj_desc, node->type); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); +} + +#endif /* ACPI_NO_METHOD_EXECUTION */ + + +/***************************************************************************** + * + * FUNCTION: acpi_ds_init_object_from_op + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser op used to init the internal object + * Opcode - AML opcode associated with the object + * ret_obj_desc - Namespace object to be initialized + * + * RETURN: Status + * + * DESCRIPTION: Initialize a namespace object from a parser Op and its + * associated arguments. The namespace object is a more compact + * representation of the Op and its arguments. + * + ****************************************************************************/ + +acpi_status +acpi_ds_init_object_from_op ( + struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + u16 opcode, + union acpi_operand_object **ret_obj_desc) +{ + const struct acpi_opcode_info *op_info; + union acpi_operand_object *obj_desc; + acpi_status status = AE_OK; + + + ACPI_FUNCTION_TRACE ("ds_init_object_from_op"); + + + obj_desc = *ret_obj_desc; + op_info = acpi_ps_get_opcode_info (opcode); + if (op_info->class == AML_CLASS_UNKNOWN) { + /* Unknown opcode */ + + return_ACPI_STATUS (AE_TYPE); + } + + /* Perform per-object initialization */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_BUFFER: + + /* + * Defer evaluation of Buffer term_arg operand + */ + obj_desc->buffer.node = (struct acpi_namespace_node *) walk_state->operands[0]; + obj_desc->buffer.aml_start = op->named.data; + obj_desc->buffer.aml_length = op->named.length; + break; + + + case ACPI_TYPE_PACKAGE: + + /* + * Defer evaluation of Package term_arg operand + */ + obj_desc->package.node = (struct acpi_namespace_node *) walk_state->operands[0]; + obj_desc->package.aml_start = op->named.data; + obj_desc->package.aml_length = op->named.length; + break; + + + case ACPI_TYPE_INTEGER: + + switch (op_info->type) { + case AML_TYPE_CONSTANT: + /* + * Resolve AML Constants here - AND ONLY HERE! + * All constants are integers. + * We mark the integer with a flag that indicates that it started life + * as a constant -- so that stores to constants will perform as expected (noop). + * (zero_op is used as a placeholder for optional target operands.) + */ + obj_desc->common.flags = AOPOBJ_AML_CONSTANT; + + switch (opcode) { + case AML_ZERO_OP: + + obj_desc->integer.value = 0; + break; + + case AML_ONE_OP: + + obj_desc->integer.value = 1; + break; + + case AML_ONES_OP: + + obj_desc->integer.value = ACPI_INTEGER_MAX; + + /* Truncate value if we are executing from a 32-bit ACPI table */ + +#ifndef ACPI_NO_METHOD_EXECUTION + acpi_ex_truncate_for32bit_table (obj_desc); +#endif + break; + + case AML_REVISION_OP: + + obj_desc->integer.value = ACPI_CA_VERSION; + break; + + default: + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown constant opcode %X\n", opcode)); + status = AE_AML_OPERAND_TYPE; + break; + } + break; + + + case AML_TYPE_LITERAL: + + obj_desc->integer.value = op->common.value.integer; + break; + + + default: + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Integer type %X\n", op_info->type)); + status = AE_AML_OPERAND_TYPE; + break; + } + break; + + + case ACPI_TYPE_STRING: + + obj_desc->string.pointer = op->common.value.string; + obj_desc->string.length = (u32) ACPI_STRLEN (op->common.value.string); + + /* + * The string is contained in the ACPI table, don't ever try + * to delete it + */ + obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; + break; + + + case ACPI_TYPE_METHOD: + break; + + + case ACPI_TYPE_LOCAL_REFERENCE: + + switch (op_info->type) { + case AML_TYPE_LOCAL_VARIABLE: + + /* Split the opcode into a base opcode + offset */ + + obj_desc->reference.opcode = AML_LOCAL_OP; + obj_desc->reference.offset = opcode - AML_LOCAL_OP; + +#ifndef ACPI_NO_METHOD_EXECUTION + status = acpi_ds_method_data_get_node (AML_LOCAL_OP, obj_desc->reference.offset, + walk_state, (struct acpi_namespace_node **) &obj_desc->reference.object); +#endif + break; + + + case AML_TYPE_METHOD_ARGUMENT: + + /* Split the opcode into a base opcode + offset */ + + obj_desc->reference.opcode = AML_ARG_OP; + obj_desc->reference.offset = opcode - AML_ARG_OP; + +#ifndef ACPI_NO_METHOD_EXECUTION + status = acpi_ds_method_data_get_node (AML_ARG_OP, obj_desc->reference.offset, + walk_state, (struct acpi_namespace_node **) &obj_desc->reference.object); +#endif + break; + + default: /* Other literals, etc.. */ + + if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { + /* Node was saved in Op */ + + obj_desc->reference.node = op->common.node; + } + + obj_desc->reference.opcode = opcode; + break; + } + break; + + + default: + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unimplemented data type: %X\n", + ACPI_GET_OBJECT_TYPE (obj_desc))); + + status = AE_AML_OPERAND_TYPE; + break; + } + + return_ACPI_STATUS (status); +} + + |