dswload.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:17k
- /******************************************************************************
- *
- * Module Name: dswload - Dispatcher namespace load callbacks
- * $Revision: 50 $
- *
- *****************************************************************************/
- /*
- * 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 "amlcode.h"
- #include "acdispat.h"
- #include "acinterp.h"
- #include "acnamesp.h"
- #include "acevents.h"
- #define _COMPONENT ACPI_DISPATCHER
- 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 (
- 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:
- 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;
- break;
- default:
- return (AE_BAD_PARAMETER);
- break;
- }
- return (AE_OK);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ds_load1_begin_op
- *
- * PARAMETERS: Walk_state - Current state of the parse tree walk
- * Op - Op that has been just been reached in the
- * walk; Arguments have not been evaluated yet.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Descending callback used during the loading of ACPI tables.
- *
- ******************************************************************************/
- acpi_status
- acpi_ds_load1_begin_op (
- acpi_walk_state *walk_state,
- acpi_parse_object **out_op)
- {
- acpi_parse_object *op;
- acpi_namespace_node *node;
- acpi_status status;
- acpi_object_type8 data_type;
- NATIVE_CHAR *path;
- PROC_NAME ("Ds_load1_begin_op");
- op = walk_state->op;
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%pn", op, walk_state));
- /* We are only interested in opcodes that have an associated name */
- if (walk_state->op) {
- if (!(walk_state->op_info->flags & AML_NAMED)) {
- *out_op = op;
- return (AE_OK);
- }
- /* Check if this object has already been installed in the namespace */
- if (op->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 */
- data_type = acpi_ds_map_named_opcode_to_data_type (walk_state->opcode);
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "State=%p Op=%p Type=%xn", walk_state, op, data_type));
- if (walk_state->opcode == AML_SCOPE_OP) {
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "State=%p Op=%p Type=%xn", walk_state, op, data_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, data_type,
- IMODE_LOAD_PASS1, NS_NO_UPSEARCH, walk_state, &(node));
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- if (!op) {
- /* Create a new op */
- op = acpi_ps_alloc_op (walk_state->opcode);
- if (!op) {
- return (AE_NO_MEMORY);
- }
- }
- /* Initialize */
- ((acpi_parse2_object *)op)->name = node->name;
- /*
- * Put the Node in the "op" object that the parser uses, so we
- * can get it again quickly when this scope is closed
- */
- op->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
- * Op - Op that has been just been completed in the
- * walk; Arguments have now been evaluated.
- *
- * 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 (
- acpi_walk_state *walk_state)
- {
- acpi_parse_object *op;
- acpi_object_type8 data_type;
- PROC_NAME ("Ds_load1_end_op");
- op = walk_state->op;
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%pn", op, walk_state));
- /* We are only interested in opcodes that have an associated name */
- if (!(walk_state->op_info->flags & AML_NAMED)) {
- return (AE_OK);
- }
- /* Get the type to determine if we should pop the scope */
- data_type = acpi_ds_map_named_opcode_to_data_type (op->opcode);
- if (op->opcode == AML_NAME_OP) {
- /* For Name opcode, check the argument */
- if (op->value.arg) {
- data_type = acpi_ds_map_opcode_to_data_type (
- (op->value.arg)->opcode, NULL);
- ((acpi_namespace_node *)op->node)->type =
- (u8) data_type;
- }
- }
- /* Pop the scope stack */
- if (acpi_ns_opens_scope (data_type)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %pn",
- acpi_ut_get_type_name (data_type), op));
- acpi_ds_scope_stack_pop (walk_state);
- }
- return (AE_OK);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ds_load2_begin_op
- *
- * PARAMETERS: Walk_state - Current state of the parse tree walk
- * Op - Op that has been just been reached in the
- * walk; Arguments have not been evaluated yet.
- *
- * RETURN: Status
- *
- * DESCRIPTION: Descending callback used during the loading of ACPI tables.
- *
- ******************************************************************************/
- acpi_status
- acpi_ds_load2_begin_op (
- acpi_walk_state *walk_state,
- acpi_parse_object **out_op)
- {
- acpi_parse_object *op;
- acpi_namespace_node *node;
- acpi_status status;
- acpi_object_type8 data_type;
- NATIVE_CHAR *buffer_ptr;
- void *original = NULL;
- PROC_NAME ("Ds_load2_begin_op");
- op = walk_state->op;
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%pn", 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) {
- return (AE_OK);
- }
- /* TBD: [Restructure] Temp! same code as in psparse */
- if (!(walk_state->op_info->flags & AML_NAMED)) {
- return (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->value.string;
- if (!buffer_ptr) {
- /* No name, just exit */
- return (AE_OK);
- }
- }
- else {
- /* Get name from the op */
- buffer_ptr = (NATIVE_CHAR *) &((acpi_parse2_object *)op)->name;
- }
- }
- else {
- buffer_ptr = acpi_ps_get_next_namestring (&walk_state->parser_state);
- }
- /* Map the raw opcode into an internal object type */
- data_type = acpi_ds_map_named_opcode_to_data_type (walk_state->opcode);
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "State=%p Op=%p Type=%xn", walk_state, op, data_type));
- if (walk_state->opcode == AML_FIELD_OP ||
- walk_state->opcode == AML_BANK_FIELD_OP ||
- walk_state->opcode == AML_INDEX_FIELD_OP) {
- node = NULL;
- status = AE_OK;
- }
- else if (walk_state->opcode == 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, data_type,
- IMODE_EXECUTE, NS_SEARCH_PARENT, walk_state, &(node));
- }
- else {
- if (op && op->node) {
- original = op->node;
- node = op->node;
- if (acpi_ns_opens_scope (data_type)) {
- status = acpi_ds_scope_stack_push (node, data_type, walk_state);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- }
- return (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.
- */
- status = acpi_ns_lookup (walk_state->scope_info, buffer_ptr, data_type,
- IMODE_EXECUTE, NS_NO_UPSEARCH, walk_state, &(node));
- }
- if (ACPI_SUCCESS (status)) {
- if (!op) {
- /* Create a new op */
- op = acpi_ps_alloc_op (walk_state->opcode);
- if (!op) {
- return (AE_NO_MEMORY);
- }
- /* Initialize */
- ((acpi_parse2_object *)op)->name = node->name;
- *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->node = node;
- if (original) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "old %p new %pn", original, node));
- if (original != node) {
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Lookup match error: old %p new %pn", original, node));
- }
- }
- }
- return (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ds_load2_end_op
- *
- * PARAMETERS: Walk_state - Current state of the parse tree walk
- * Op - Op that has been just been completed in the
- * walk; Arguments have now been evaluated.
- *
- * 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 (
- acpi_walk_state *walk_state)
- {
- acpi_parse_object *op;
- acpi_status status = AE_OK;
- acpi_object_type8 data_type;
- acpi_namespace_node *node;
- acpi_parse_object *arg;
- acpi_namespace_node *new_node;
- u32 i;
- PROC_NAME ("Ds_load2_end_op");
- op = walk_state->op;
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%pn", op, walk_state));
- /* Only interested in opcodes that have namespace objects */
- if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
- return (AE_OK);
- }
- if (op->opcode == AML_SCOPE_OP) {
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "Ending scope Op=%p State=%pn", op, walk_state));
- if (((acpi_parse2_object *)op)->name == -1) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unnamed scope! Op=%p State=%pn",
- op, walk_state));
- return (AE_OK);
- }
- }
- data_type = acpi_ds_map_named_opcode_to_data_type (op->opcode);
- /*
- * Get the Node/name from the earlier lookup
- * (It was saved in the *op structure)
- */
- node = op->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 (data_type)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %pn",
- acpi_ut_get_type_name (data_type), op));
- acpi_ds_scope_stack_pop (walk_state);
- }
- /*
- * 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=%pn",
- acpi_ps_get_opcode_name (op->opcode), walk_state, op, node));
- /* Decode the opcode */
- arg = op->value.arg;
- switch (walk_state->op_info->type) {
- 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:
- arg = op->value.arg;
- switch (op->opcode) {
- case AML_INDEX_FIELD_OP:
- status = acpi_ds_create_index_field (op, (acpi_handle) arg->node,
- walk_state);
- break;
- case AML_BANK_FIELD_OP:
- status = acpi_ds_create_bank_field (op, arg->node, walk_state);
- break;
- case AML_FIELD_OP:
- status = acpi_ds_create_field (op, arg->node, walk_state);
- break;
- }
- break;
- case AML_TYPE_NAMED_SIMPLE:
- status = acpi_ds_create_operands (walk_state, arg);
- if (ACPI_FAILURE (status)) {
- goto cleanup;
- }
- switch (op->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;
- break;
- }
- /* 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;
- case AML_TYPE_NAMED_COMPLEX:
- switch (op->opcode) {
- case AML_METHOD_OP:
- /*
- * Method_op Pkg_length Names_string Method_flags Term_list
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "LOADING-Method: State=%p Op=%p Named_obj=%pn",
- walk_state, op, node));
- if (!node->object) {
- status = acpi_ds_create_operands (walk_state, arg);
- if (ACPI_FAILURE (status)) {
- goto cleanup;
- }
- status = acpi_ex_create_method (((acpi_parse2_object *) op)->data,
- ((acpi_parse2_object *) op)->length,
- walk_state);
- }
- break;
- 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)
- */
- status = acpi_ex_create_region (((acpi_parse2_object *) op)->data,
- ((acpi_parse2_object *) op)->length,
- (ACPI_ADR_SPACE_TYPE) arg->value.integer, walk_state);
- break;
- case AML_NAME_OP:
- status = acpi_ds_create_node (walk_state, node, op);
- 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=%pn",
- walk_state, op, node));
- /*
- * Lookup the method name and save the Node
- */
- status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
- ACPI_TYPE_ANY, IMODE_LOAD_PASS2,
- NS_SEARCH_PARENT | NS_DONT_OPEN_SCOPE,
- walk_state, &(new_node));
- if (ACPI_SUCCESS (status)) {
- /* TBD: has name already been resolved by here ??*/
- /* TBD: [Restructure] 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! */
- /* 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->node = new_node;
- }
- break;
- default:
- break;
- }
- cleanup:
- /* Remove the Node pushed at the very beginning */
- walk_state->operands[0] = NULL;
- walk_state->num_operands = 0;
- return (status);
- }