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linux/drivers/acpi/dispatcher/dswload.c

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/******************************************************************************
*
* Module Name: dswload - Dispatcher namespace load callbacks
*
*****************************************************************************/
/*
* 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/acinterp.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>
#ifdef _ACPI_ASL_COMPILER
#include <acpi/acdisasm.h>
#endif
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME ("dswload")
/*******************************************************************************
*
* FUNCTION: acpi_ds_init_callbacks
*
* PARAMETERS: walk_state - Current state of the parse tree walk
* pass_number - 1, 2, or 3
*
* RETURN: Status
*
* DESCRIPTION: Init walk state callbacks
*
******************************************************************************/
acpi_status
acpi_ds_init_callbacks (
struct acpi_walk_state *walk_state,
u32 pass_number)
{
switch (pass_number) {
case 1:
walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
ACPI_PARSE_DELETE_TREE;
walk_state->descending_callback = acpi_ds_load1_begin_op;
walk_state->ascending_callback = acpi_ds_load1_end_op;
break;
case 2:
walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
ACPI_PARSE_DELETE_TREE;
walk_state->descending_callback = acpi_ds_load2_begin_op;
walk_state->ascending_callback = acpi_ds_load2_end_op;
break;
case 3:
#ifndef ACPI_NO_METHOD_EXECUTION
walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
ACPI_PARSE_DELETE_TREE;
walk_state->descending_callback = acpi_ds_exec_begin_op;
walk_state->ascending_callback = acpi_ds_exec_end_op;
#endif
break;
default:
return (AE_BAD_PARAMETER);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_load1_begin_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
* out_op - Where to return op if a new one is created
*
* RETURN: Status
*
* DESCRIPTION: Descending callback used during the loading of ACPI tables.
*
******************************************************************************/
acpi_status
acpi_ds_load1_begin_op (
struct acpi_walk_state *walk_state,
union acpi_parse_object **out_op)
{
union acpi_parse_object *op;
struct acpi_namespace_node *node;
acpi_status status;
acpi_object_type object_type;
char *path;
u32 flags;
ACPI_FUNCTION_NAME ("ds_load1_begin_op");
op = walk_state->op;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
/* We are only interested in opcodes that have an associated name */
if (op) {
if (!(walk_state->op_info->flags & AML_NAMED)) {
#if 0
if ((walk_state->op_info->class == AML_CLASS_EXECUTE) ||
(walk_state->op_info->class == AML_CLASS_CONTROL)) {
acpi_os_printf ("\n\n***EXECUTABLE OPCODE %s***\n\n",
walk_state->op_info->name);
*out_op = op;
return (AE_CTRL_SKIP);
}
#endif
*out_op = op;
return (AE_OK);
}
/* Check if this object has already been installed in the namespace */
if (op->common.node) {
*out_op = op;
return (AE_OK);
}
}
path = acpi_ps_get_next_namestring (&walk_state->parser_state);
/* Map the raw opcode into an internal object type */
object_type = walk_state->op_info->object_type;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"State=%p Op=%p [%s]\n", walk_state, op, acpi_ut_get_type_name (object_type)));
switch (walk_state->opcode) {
case AML_SCOPE_OP:
/*
* The target name of the Scope() operator must exist at this point so
* that we can actually open the scope to enter new names underneath it.
* Allow search-to-root for single namesegs.
*/
status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, walk_state, &(node));
#ifdef _ACPI_ASL_COMPILER
if (status == AE_NOT_FOUND) {
/*
* Table disassembly:
* Target of Scope() not found. Generate an External for it, and
* insert the name into the namespace.
*/
acpi_dm_add_to_external_list (path);
status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
walk_state, &(node));
}
#endif
if (ACPI_FAILURE (status)) {
ACPI_REPORT_NSERROR (path, status);
return (status);
}
/*
* Check to make sure that the target is
* one of the opcodes that actually opens a scope
*/
switch (node->type) {
case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* These are acceptable types */
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These types we will allow, but we will change the type. This
* enables some existing code of the form:
*
* Name (DEB, 0)
* Scope (DEB) { ... }
*
* Note: silently change the type here. On the second pass, we will report
* a warning
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
path, acpi_ut_get_type_name (node->type)));
node->type = ACPI_TYPE_ANY;
walk_state->scope_info->common.value = ACPI_TYPE_ANY;
break;
default:
/* All other types are an error */
ACPI_REPORT_ERROR ((
"Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)\n",
acpi_ut_get_type_name (node->type), path));
return (AE_AML_OPERAND_TYPE);
}
break;
default:
/*
* For all other named opcodes, we will enter the name into
* the namespace.
*
* Setup the search flags.
* Since we are entering a name into the namespace, we do not want to
* enable the search-to-root upsearch.
*
* There are only two conditions where it is acceptable that the name
* already exists:
* 1) the Scope() operator can reopen a scoping object that was
* previously defined (Scope, Method, Device, etc.)
* 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
* buffer_field, or Package), the name of the object is already
* in the namespace.
*/
if (walk_state->deferred_node) {
/* This name is already in the namespace, get the node */
node = walk_state->deferred_node;
status = AE_OK;
break;
}
flags = ACPI_NS_NO_UPSEARCH;
if ((walk_state->opcode != AML_SCOPE_OP) &&
(!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
flags |= ACPI_NS_ERROR_IF_FOUND;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
acpi_ut_get_type_name (object_type)));
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"[%s] Both Find or Create allowed\n",
acpi_ut_get_type_name (object_type)));
}
/*
* Enter the named type into the internal namespace. We enter the name
* as we go downward in the parse tree. Any necessary subobjects that
* involve arguments to the opcode must be created as we go back up the
* parse tree later.
*/
status = acpi_ns_lookup (walk_state->scope_info, path, object_type,
ACPI_IMODE_LOAD_PASS1, flags, walk_state, &(node));
if (ACPI_FAILURE (status)) {
ACPI_REPORT_NSERROR (path, status);
return (status);
}
break;
}
/* Common exit */
if (!op) {
/* Create a new op */
op = acpi_ps_alloc_op (walk_state->opcode);
if (!op) {
return (AE_NO_MEMORY);
}
}
/* Initialize */
op->named.name = node->name.integer;
#if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
op->named.path = (u8 *) path;
#endif
/*
* Put the Node in the "op" object that the parser uses, so we
* can get it again quickly when this scope is closed
*/
op->common.node = node;
acpi_ps_append_arg (acpi_ps_get_parent_scope (&walk_state->parser_state), op);
*out_op = op;
return (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_load1_end_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback used during the loading of the namespace,
* both control methods and everything else.
*
******************************************************************************/
acpi_status
acpi_ds_load1_end_op (
struct acpi_walk_state *walk_state)
{
union acpi_parse_object *op;
acpi_object_type object_type;
acpi_status status = AE_OK;
ACPI_FUNCTION_NAME ("ds_load1_end_op");
op = walk_state->op;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
/* We are only interested in opcodes that have an associated name */
if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
return (AE_OK);
}
/* Get the object type to determine if we should pop the scope */
object_type = walk_state->op_info->object_type;
#ifndef ACPI_NO_METHOD_EXECUTION
if (walk_state->op_info->flags & AML_FIELD) {
if (walk_state->opcode == AML_FIELD_OP ||
walk_state->opcode == AML_BANK_FIELD_OP ||
walk_state->opcode == AML_INDEX_FIELD_OP) {
status = acpi_ds_init_field_objects (op, walk_state);
}
return (status);
}
if (op->common.aml_opcode == AML_REGION_OP) {
status = acpi_ex_create_region (op->named.data, op->named.length,
(acpi_adr_space_type)
((op->common.value.arg)->common.value.integer),
walk_state);
if (ACPI_FAILURE (status)) {
return (status);
}
}
#endif
if (op->common.aml_opcode == AML_NAME_OP) {
/* For Name opcode, get the object type from the argument */
if (op->common.value.arg) {
object_type = (acpi_ps_get_opcode_info (
(op->common.value.arg)->common.aml_opcode))->object_type;
op->common.node->type = (u8) object_type;
}
}
if (op->common.aml_opcode == AML_METHOD_OP) {
/*
* method_op pkg_length name_string method_flags term_list
*
* Note: We must create the method node/object pair as soon as we
* see the method declaration. This allows later pass1 parsing
* of invocations of the method (need to know the number of
* arguments.)
*/
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"LOADING-Method: State=%p Op=%p named_obj=%p\n",
walk_state, op, op->named.node));
if (!acpi_ns_get_attached_object (op->named.node)) {
walk_state->operands[0] = (void *) op->named.node;
walk_state->num_operands = 1;
status = acpi_ds_create_operands (walk_state, op->common.value.arg);
if (ACPI_SUCCESS (status)) {
status = acpi_ex_create_method (op->named.data,
op->named.length, walk_state);
}
walk_state->operands[0] = NULL;
walk_state->num_operands = 0;
if (ACPI_FAILURE (status)) {
return (status);
}
}
}
/* Pop the scope stack */
if (acpi_ns_opens_scope (object_type)) {
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
acpi_ut_get_type_name (object_type), op));
status = acpi_ds_scope_stack_pop (walk_state);
}
return (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_load2_begin_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
* out_op - Wher to return op if a new one is created
*
* RETURN: Status
*
* DESCRIPTION: Descending callback used during the loading of ACPI tables.
*
******************************************************************************/
acpi_status
acpi_ds_load2_begin_op (
struct acpi_walk_state *walk_state,
union acpi_parse_object **out_op)
{
union acpi_parse_object *op;
struct acpi_namespace_node *node;
acpi_status status;
acpi_object_type object_type;
char *buffer_ptr;
ACPI_FUNCTION_TRACE ("ds_load2_begin_op");
op = walk_state->op;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, walk_state));
if (op) {
/* We only care about Namespace opcodes here */
if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
(walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
(!(walk_state->op_info->flags & AML_NAMED))) {
return_ACPI_STATUS (AE_OK);
}
/* Get the name we are going to enter or lookup in the namespace */
if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
/* For Namepath op, get the path string */
buffer_ptr = op->common.value.string;
if (!buffer_ptr) {
/* No name, just exit */
return_ACPI_STATUS (AE_OK);
}
}
else {
/* Get name from the op */
buffer_ptr = (char *) &op->named.name;
}
}
else {
/* Get the namestring from the raw AML */
buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
}
/* Map the opcode into an internal object type */
object_type = walk_state->op_info->object_type;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"State=%p Op=%p Type=%X\n", walk_state, op, object_type));
switch (walk_state->opcode) {
case AML_FIELD_OP:
case AML_BANK_FIELD_OP:
case AML_INDEX_FIELD_OP:
node = NULL;
status = AE_OK;
break;
case AML_INT_NAMEPATH_OP:
/*
* The name_path is an object reference to an existing object.
* Don't enter the name into the namespace, but look it up
* for use later.
*/
status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
walk_state, &(node));
break;
case AML_SCOPE_OP:
/*
* The Path is an object reference to an existing object.
* Don't enter the name into the namespace, but look it up
* for use later.
*/
status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
walk_state, &(node));
if (ACPI_FAILURE (status)) {
#ifdef _ACPI_ASL_COMPILER
if (status == AE_NOT_FOUND) {
status = AE_OK;
}
else {
ACPI_REPORT_NSERROR (buffer_ptr, status);
}
#else
ACPI_REPORT_NSERROR (buffer_ptr, status);
#endif
return_ACPI_STATUS (status);
}
/*
* We must check to make sure that the target is
* one of the opcodes that actually opens a scope
*/
switch (node->type) {
case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* These are acceptable types */
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These types we will allow, but we will change the type. This
* enables some existing code of the form:
*
* Name (DEB, 0)
* Scope (DEB) { ... }
*/
ACPI_REPORT_WARNING ((
"Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
buffer_ptr, acpi_ut_get_type_name (node->type)));
node->type = ACPI_TYPE_ANY;
walk_state->scope_info->common.value = ACPI_TYPE_ANY;
break;
default:
/* All other types are an error */
ACPI_REPORT_ERROR ((
"Invalid type (%s) for target of Scope operator [%4.4s]\n",
acpi_ut_get_type_name (node->type), buffer_ptr));
return (AE_AML_OPERAND_TYPE);
}
break;
default:
/* All other opcodes */
if (op && op->common.node) {
/* This op/node was previously entered into the namespace */
node = op->common.node;
if (acpi_ns_opens_scope (object_type)) {
status = acpi_ds_scope_stack_push (node, object_type, walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
return_ACPI_STATUS (AE_OK);
}
/*
* Enter the named type into the internal namespace. We enter the name
* as we go downward in the parse tree. Any necessary subobjects that
* involve arguments to the opcode must be created as we go back up the
* parse tree later.
*
* Note: Name may already exist if we are executing a deferred opcode.
*/
if (walk_state->deferred_node) {
/* This name is already in the namespace, get the node */
node = walk_state->deferred_node;
status = AE_OK;
break;
}
status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, object_type,
ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH,
walk_state, &(node));
break;
}
if (ACPI_FAILURE (status)) {
ACPI_REPORT_NSERROR (buffer_ptr, status);
return_ACPI_STATUS (status);
}
if (!op) {
/* Create a new op */
op = acpi_ps_alloc_op (walk_state->opcode);
if (!op) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize the new op */
if (node) {
op->named.name = node->name.integer;
}
if (out_op) {
*out_op = op;
}
}
/*
* Put the Node in the "op" object that the parser uses, so we
* can get it again quickly when this scope is closed
*/
op->common.node = node;
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_load2_end_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback used during the loading of the namespace,
* both control methods and everything else.
*
******************************************************************************/
acpi_status
acpi_ds_load2_end_op (
struct acpi_walk_state *walk_state)
{
union acpi_parse_object *op;
acpi_status status = AE_OK;
acpi_object_type object_type;
struct acpi_namespace_node *node;
union acpi_parse_object *arg;
struct acpi_namespace_node *new_node;
#ifndef ACPI_NO_METHOD_EXECUTION
u32 i;
#endif
ACPI_FUNCTION_TRACE ("ds_load2_end_op");
op = walk_state->op;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
walk_state->op_info->name, op, walk_state));
/* Only interested in opcodes that have namespace objects */
if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
return_ACPI_STATUS (AE_OK);
}
if (op->common.aml_opcode == AML_SCOPE_OP) {
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Ending scope Op=%p State=%p\n", op, walk_state));
}
object_type = walk_state->op_info->object_type;
/*
* Get the Node/name from the earlier lookup
* (It was saved in the *op structure)
*/
node = op->common.node;
/*
* Put the Node on the object stack (Contains the ACPI Name of
* this object)
*/
walk_state->operands[0] = (void *) node;
walk_state->num_operands = 1;
/* Pop the scope stack */
if (acpi_ns_opens_scope (object_type) &&
(op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
acpi_ut_get_type_name (object_type), op));
status = acpi_ds_scope_stack_pop (walk_state);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
}
/*
* Named operations are as follows:
*
* AML_ALIAS
* AML_BANKFIELD
* AML_CREATEBITFIELD
* AML_CREATEBYTEFIELD
* AML_CREATEDWORDFIELD
* AML_CREATEFIELD
* AML_CREATEQWORDFIELD
* AML_CREATEWORDFIELD
* AML_DATA_REGION
* AML_DEVICE
* AML_EVENT
* AML_FIELD
* AML_INDEXFIELD
* AML_METHOD
* AML_METHODCALL
* AML_MUTEX
* AML_NAME
* AML_NAMEDFIELD
* AML_OPREGION
* AML_POWERRES
* AML_PROCESSOR
* AML_SCOPE
* AML_THERMALZONE
*/
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Create-Load [%s] State=%p Op=%p named_obj=%p\n",
acpi_ps_get_opcode_name (op->common.aml_opcode), walk_state, op, node));
/* Decode the opcode */
arg = op->common.value.arg;
switch (walk_state->op_info->type) {
#ifndef ACPI_NO_METHOD_EXECUTION
case AML_TYPE_CREATE_FIELD:
/*
* Create the field object, but the field buffer and index must
* be evaluated later during the execution phase
*/
status = acpi_ds_create_buffer_field (op, walk_state);
break;
case AML_TYPE_NAMED_FIELD:
switch (op->common.aml_opcode) {
case AML_INDEX_FIELD_OP:
status = acpi_ds_create_index_field (op, (acpi_handle) arg->common.node,
walk_state);
break;
case AML_BANK_FIELD_OP:
status = acpi_ds_create_bank_field (op, arg->common.node, walk_state);
break;
case AML_FIELD_OP:
status = acpi_ds_create_field (op, arg->common.node, walk_state);
break;
default:
/* All NAMED_FIELD opcodes must be handled above */
break;
}
break;
case AML_TYPE_NAMED_SIMPLE:
status = acpi_ds_create_operands (walk_state, arg);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
switch (op->common.aml_opcode) {
case AML_PROCESSOR_OP:
status = acpi_ex_create_processor (walk_state);
break;
case AML_POWER_RES_OP:
status = acpi_ex_create_power_resource (walk_state);
break;
case AML_MUTEX_OP:
status = acpi_ex_create_mutex (walk_state);
break;
case AML_EVENT_OP:
status = acpi_ex_create_event (walk_state);
break;
case AML_DATA_REGION_OP:
status = acpi_ex_create_table_region (walk_state);
break;
case AML_ALIAS_OP:
status = acpi_ex_create_alias (walk_state);
break;
default:
/* Unknown opcode */
status = AE_OK;
goto cleanup;
}
/* Delete operands */
for (i = 1; i < walk_state->num_operands; i++) {
acpi_ut_remove_reference (walk_state->operands[i]);
walk_state->operands[i] = NULL;
}
break;
#endif /* ACPI_NO_METHOD_EXECUTION */
case AML_TYPE_NAMED_COMPLEX:
switch (op->common.aml_opcode) {
#ifndef ACPI_NO_METHOD_EXECUTION
case AML_REGION_OP:
/*
* The op_region is not fully parsed at this time. Only valid
* argument is the space_id. (We must save the address of the
* AML of the address and length operands)
*/
/*
* If we have a valid region, initialize it
* Namespace is NOT locked at this point.
*/
status = acpi_ev_initialize_region (acpi_ns_get_attached_object (node),
FALSE);
if (ACPI_FAILURE (status)) {
/*
* If AE_NOT_EXIST is returned, it is not fatal
* because many regions get created before a handler
* is installed for said region.
*/
if (AE_NOT_EXIST == status) {
status = AE_OK;
}
}
break;
case AML_NAME_OP:
status = acpi_ds_create_node (walk_state, node, op);
break;
#endif /* ACPI_NO_METHOD_EXECUTION */
default:
/* All NAMED_COMPLEX opcodes must be handled above */
/* Note: Method objects were already created in Pass 1 */
break;
}
break;
case AML_CLASS_INTERNAL:
/* case AML_INT_NAMEPATH_OP: */
break;
case AML_CLASS_METHOD_CALL:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"RESOLVING-method_call: State=%p Op=%p named_obj=%p\n",
walk_state, op, node));
/*
* Lookup the method name and save the Node
*/
status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
walk_state, &(new_node));
if (ACPI_SUCCESS (status)) {
/*
* Make sure that what we found is indeed a method
* We didn't search for a method on purpose, to see if the name
* would resolve
*/
if (new_node->type != ACPI_TYPE_METHOD) {
status = AE_AML_OPERAND_TYPE;
}
/* We could put the returned object (Node) on the object stack for
* later, but for now, we will put it in the "op" object that the
* parser uses, so we can get it again at the end of this scope
*/
op->common.node = new_node;
}
else {
ACPI_REPORT_NSERROR (arg->common.value.string, status);
}
break;
default:
break;
}
cleanup:
/* Remove the Node pushed at the very beginning */
walk_state->operands[0] = NULL;
walk_state->num_operands = 0;
return_ACPI_STATUS (status);
}
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