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1100 lines
30 KiB
1100 lines
30 KiB
/******************************************************************************
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*
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* Module Name: dswstate - Dispatcher parse tree walk management routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acparser.h>
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#include <acpi/acdispat.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dswstate")
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#ifdef ACPI_FUTURE_USAGE
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_insert
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*
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* PARAMETERS: Object - Object to push
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* Index - Where to insert the object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Insert an object onto this walk's result stack
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_insert (
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void *object,
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u32 index,
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_insert");
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state = walk_state->results;
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if (!state) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
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walk_state));
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return (AE_NOT_EXIST);
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}
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if (index >= ACPI_OBJ_NUM_OPERANDS) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Index out of range: %X Obj=%p State=%p Num=%X\n",
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index, object, walk_state, state->results.num_results));
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return (AE_BAD_PARAMETER);
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}
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if (!object) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Null Object! Index=%X Obj=%p State=%p Num=%X\n",
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index, object, walk_state, state->results.num_results));
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return (AE_BAD_PARAMETER);
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}
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state->results.obj_desc [index] = object;
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state->results.num_results++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Obj=%p [%s] State=%p Num=%X Cur=%X\n",
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object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
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walk_state, state->results.num_results, walk_state->current_result));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_remove
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*
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* PARAMETERS: Object - Where to return the popped object
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* Index - Where to extract the object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
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* other words, this is a FIFO.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_remove (
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union acpi_operand_object **object,
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u32 index,
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_remove");
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state = walk_state->results;
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if (!state) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
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walk_state));
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return (AE_NOT_EXIST);
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}
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if (index >= ACPI_OBJ_MAX_OPERAND) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Index out of range: %X State=%p Num=%X\n",
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index, walk_state, state->results.num_results));
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}
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/* Check for a valid result object */
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if (!state->results.obj_desc [index]) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Null operand! State=%p #Ops=%X, Index=%X\n",
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walk_state, state->results.num_results, index));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Remove the object */
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state->results.num_results--;
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*object = state->results.obj_desc [index];
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state->results.obj_desc [index] = NULL;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Obj=%p [%s] Index=%X State=%p Num=%X\n",
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*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
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index, walk_state, state->results.num_results));
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return (AE_OK);
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}
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#endif /* ACPI_FUTURE_USAGE */
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_pop
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*
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* PARAMETERS: Object - Where to return the popped object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
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* other words, this is a FIFO.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_pop (
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union acpi_operand_object **object,
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struct acpi_walk_state *walk_state)
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{
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acpi_native_uint index;
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_pop");
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state = walk_state->results;
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if (!state) {
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return (AE_OK);
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}
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if (!state->results.num_results) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Result stack is empty! State=%p\n",
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walk_state));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Remove top element */
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state->results.num_results--;
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for (index = ACPI_OBJ_NUM_OPERANDS; index; index--) {
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/* Check for a valid result object */
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if (state->results.obj_desc [index -1]) {
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*object = state->results.obj_desc [index -1];
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state->results.obj_desc [index -1] = NULL;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] Index=%X State=%p Num=%X\n",
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*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
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(u32) index -1, walk_state, state->results.num_results));
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return (AE_OK);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n", walk_state));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_pop_from_bottom
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*
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* PARAMETERS: Object - Where to return the popped object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
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* other words, this is a FIFO.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_pop_from_bottom (
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union acpi_operand_object **object,
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struct acpi_walk_state *walk_state)
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{
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acpi_native_uint index;
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_pop_from_bottom");
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state = walk_state->results;
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if (!state) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Warning: No result object pushed! State=%p\n", walk_state));
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return (AE_NOT_EXIST);
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}
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if (!state->results.num_results) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n", walk_state));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Remove Bottom element */
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*object = state->results.obj_desc [0];
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/* Push entire stack down one element */
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for (index = 0; index < state->results.num_results; index++) {
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state->results.obj_desc [index] = state->results.obj_desc [index + 1];
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}
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state->results.num_results--;
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/* Check for a valid result object */
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if (!*object) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null operand! State=%p #Ops=%X, Index=%X\n",
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walk_state, state->results.num_results, (u32) index));
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return (AE_AML_NO_RETURN_VALUE);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s], Results=%p State=%p\n",
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*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
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state, walk_state));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_push
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*
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* PARAMETERS: Object - Where to return the popped object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto the current result stack
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_push (
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union acpi_operand_object *object,
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_push");
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state = walk_state->results;
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if (!state) {
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ACPI_REPORT_ERROR (("No result stack frame during push\n"));
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return (AE_AML_INTERNAL);
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}
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if (state->results.num_results == ACPI_OBJ_NUM_OPERANDS) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Result stack overflow: Obj=%p State=%p Num=%X\n",
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object, walk_state, state->results.num_results));
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return (AE_STACK_OVERFLOW);
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}
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if (!object) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Object! Obj=%p State=%p Num=%X\n",
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object, walk_state, state->results.num_results));
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return (AE_BAD_PARAMETER);
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}
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state->results.obj_desc [state->results.num_results] = object;
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state->results.num_results++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
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object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
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walk_state, state->results.num_results, walk_state->current_result));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_stack_push
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*
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* PARAMETERS: walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto the walk_state result stack.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_stack_push (
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_stack_push");
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state = acpi_ut_create_generic_state ();
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if (!state) {
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return (AE_NO_MEMORY);
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}
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state->common.data_type = ACPI_DESC_TYPE_STATE_RESULT;
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acpi_ut_push_generic_state (&walk_state->results, state);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n",
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state, walk_state));
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_stack_pop
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*
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* PARAMETERS: walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off of the walk_state result stack.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_stack_pop (
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_stack_pop");
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/* Check for stack underflow */
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if (walk_state->results == NULL) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Underflow - State=%p\n",
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walk_state));
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return (AE_AML_NO_OPERAND);
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}
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state = acpi_ut_pop_generic_state (&walk_state->results);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Result=%p remaining_results=%X State=%p\n",
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state, state->results.num_results, walk_state));
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acpi_ut_delete_generic_state (state);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_obj_stack_delete_all
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*
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* PARAMETERS: walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Clear the object stack by deleting all objects that are on it.
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* Should be used with great care, if at all!
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*
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******************************************************************************/
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_ds_obj_stack_delete_all (
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struct acpi_walk_state *walk_state)
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{
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u32 i;
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ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_delete_all", walk_state);
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/* The stack size is configurable, but fixed */
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for (i = 0; i < ACPI_OBJ_NUM_OPERANDS; i++) {
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if (walk_state->operands[i]) {
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acpi_ut_remove_reference (walk_state->operands[i]);
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walk_state->operands[i] = NULL;
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}
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}
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return_ACPI_STATUS (AE_OK);
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}
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#endif /* ACPI_FUTURE_USAGE */
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_obj_stack_push
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*
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* PARAMETERS: Object - Object to push
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto this walk's object/operand stack
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*
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******************************************************************************/
|
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acpi_status
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acpi_ds_obj_stack_push (
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void *object,
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struct acpi_walk_state *walk_state)
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{
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ACPI_FUNCTION_NAME ("ds_obj_stack_push");
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/* Check for stack overflow */
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if (walk_state->num_operands >= ACPI_OBJ_NUM_OPERANDS) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"overflow! Obj=%p State=%p #Ops=%X\n",
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object, walk_state, walk_state->num_operands));
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return (AE_STACK_OVERFLOW);
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}
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/* Put the object onto the stack */
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walk_state->operands [walk_state->num_operands] = object;
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walk_state->num_operands++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
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object, acpi_ut_get_object_type_name ((union acpi_operand_object *) object),
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walk_state, walk_state->num_operands));
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return (AE_OK);
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}
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#if 0
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_obj_stack_pop_object
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*
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* PARAMETERS: pop_count - Number of objects/entries to pop
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
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* deleted by this routine.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_obj_stack_pop_object (
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union acpi_operand_object **object,
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struct acpi_walk_state *walk_state)
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{
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ACPI_FUNCTION_NAME ("ds_obj_stack_pop_object");
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/* Check for stack underflow */
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if (walk_state->num_operands == 0) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Missing operand/stack empty! State=%p #Ops=%X\n",
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walk_state, walk_state->num_operands));
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*object = NULL;
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return (AE_AML_NO_OPERAND);
|
|
}
|
|
|
|
/* Pop the stack */
|
|
|
|
walk_state->num_operands--;
|
|
|
|
/* Check for a valid operand */
|
|
|
|
if (!walk_state->operands [walk_state->num_operands]) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Null operand! State=%p #Ops=%X\n",
|
|
walk_state, walk_state->num_operands));
|
|
*object = NULL;
|
|
return (AE_AML_NO_OPERAND);
|
|
}
|
|
|
|
/* Get operand and set stack entry to null */
|
|
|
|
*object = walk_state->operands [walk_state->num_operands];
|
|
walk_state->operands [walk_state->num_operands] = NULL;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
|
|
*object, acpi_ut_get_object_type_name (*object),
|
|
walk_state, walk_state->num_operands));
|
|
|
|
return (AE_OK);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_pop
|
|
*
|
|
* PARAMETERS: pop_count - Number of objects/entries to pop
|
|
* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
|
|
* deleted by this routine.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_obj_stack_pop (
|
|
u32 pop_count,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_NAME ("ds_obj_stack_pop");
|
|
|
|
|
|
for (i = 0; i < pop_count; i++) {
|
|
/* Check for stack underflow */
|
|
|
|
if (walk_state->num_operands == 0) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Underflow! Count=%X State=%p #Ops=%X\n",
|
|
pop_count, walk_state, walk_state->num_operands));
|
|
return (AE_STACK_UNDERFLOW);
|
|
}
|
|
|
|
/* Just set the stack entry to null */
|
|
|
|
walk_state->num_operands--;
|
|
walk_state->operands [walk_state->num_operands] = NULL;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
|
|
pop_count, walk_state, walk_state->num_operands));
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_pop_and_delete
|
|
*
|
|
* PARAMETERS: pop_count - Number of objects/entries to pop
|
|
* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Pop this walk's object stack and delete each object that is
|
|
* popped off.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_obj_stack_pop_and_delete (
|
|
u32 pop_count,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
u32 i;
|
|
union acpi_operand_object *obj_desc;
|
|
|
|
|
|
ACPI_FUNCTION_NAME ("ds_obj_stack_pop_and_delete");
|
|
|
|
|
|
for (i = 0; i < pop_count; i++) {
|
|
/* Check for stack underflow */
|
|
|
|
if (walk_state->num_operands == 0) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Underflow! Count=%X State=%p #Ops=%X\n",
|
|
pop_count, walk_state, walk_state->num_operands));
|
|
return (AE_STACK_UNDERFLOW);
|
|
}
|
|
|
|
/* Pop the stack and delete an object if present in this stack entry */
|
|
|
|
walk_state->num_operands--;
|
|
obj_desc = walk_state->operands [walk_state->num_operands];
|
|
if (obj_desc) {
|
|
acpi_ut_remove_reference (walk_state->operands [walk_state->num_operands]);
|
|
walk_state->operands [walk_state->num_operands] = NULL;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
|
|
pop_count, walk_state, walk_state->num_operands));
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_get_value
|
|
*
|
|
* PARAMETERS: Index - Stack index whose value is desired. Based
|
|
* on the top of the stack (index=0 == top)
|
|
* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Retrieve an object from this walk's object stack. Index must
|
|
* be within the range of the current stack pointer.
|
|
*
|
|
******************************************************************************/
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
void *
|
|
acpi_ds_obj_stack_get_value (
|
|
u32 index,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_get_value", walk_state);
|
|
|
|
|
|
/* Can't do it if the stack is empty */
|
|
|
|
if (walk_state->num_operands == 0) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* or if the index is past the top of the stack */
|
|
|
|
if (index > (walk_state->num_operands - (u32) 1)) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
return_PTR (walk_state->operands[(acpi_native_uint)(walk_state->num_operands - 1) -
|
|
index]);
|
|
}
|
|
#endif /* ACPI_FUTURE_USAGE */
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_get_current_walk_state
|
|
*
|
|
* PARAMETERS: Thread - Get current active state for this Thread
|
|
*
|
|
* RETURN: Pointer to the current walk state
|
|
*
|
|
* DESCRIPTION: Get the walk state that is at the head of the list (the "current"
|
|
* walk state.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_walk_state *
|
|
acpi_ds_get_current_walk_state (
|
|
struct acpi_thread_state *thread)
|
|
|
|
{
|
|
ACPI_FUNCTION_NAME ("ds_get_current_walk_state");
|
|
|
|
|
|
if (!thread) {
|
|
return (NULL);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Current walk_state %p\n",
|
|
thread->walk_state_list));
|
|
|
|
return (thread->walk_state_list);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_push_walk_state
|
|
*
|
|
* PARAMETERS: walk_state - State to push
|
|
* walk_list - The list that owns the walk stack
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Place the walk_state at the head of the state list.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ds_push_walk_state (
|
|
struct acpi_walk_state *walk_state,
|
|
struct acpi_thread_state *thread)
|
|
{
|
|
ACPI_FUNCTION_TRACE ("ds_push_walk_state");
|
|
|
|
|
|
walk_state->next = thread->walk_state_list;
|
|
thread->walk_state_list = walk_state;
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_pop_walk_state
|
|
*
|
|
* PARAMETERS: walk_list - The list that owns the walk stack
|
|
*
|
|
* RETURN: A walk_state object popped from the stack
|
|
*
|
|
* DESCRIPTION: Remove and return the walkstate object that is at the head of
|
|
* the walk stack for the given walk list. NULL indicates that
|
|
* the list is empty.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_walk_state *
|
|
acpi_ds_pop_walk_state (
|
|
struct acpi_thread_state *thread)
|
|
{
|
|
struct acpi_walk_state *walk_state;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ds_pop_walk_state");
|
|
|
|
|
|
walk_state = thread->walk_state_list;
|
|
|
|
if (walk_state) {
|
|
/* Next walk state becomes the current walk state */
|
|
|
|
thread->walk_state_list = walk_state->next;
|
|
|
|
/*
|
|
* Don't clear the NEXT field, this serves as an indicator
|
|
* that there is a parent WALK STATE
|
|
* NO: walk_state->Next = NULL;
|
|
*/
|
|
}
|
|
|
|
return_PTR (walk_state);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_create_walk_state
|
|
*
|
|
* PARAMETERS: Origin - Starting point for this walk
|
|
* Thread - Current thread state
|
|
*
|
|
* RETURN: Pointer to the new walk state.
|
|
*
|
|
* DESCRIPTION: Allocate and initialize a new walk state. The current walk
|
|
* state is set to this new state.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_walk_state *
|
|
acpi_ds_create_walk_state (
|
|
acpi_owner_id owner_id,
|
|
union acpi_parse_object *origin,
|
|
union acpi_operand_object *mth_desc,
|
|
struct acpi_thread_state *thread)
|
|
{
|
|
struct acpi_walk_state *walk_state;
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ds_create_walk_state");
|
|
|
|
|
|
walk_state = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_WALK);
|
|
if (!walk_state) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
walk_state->data_type = ACPI_DESC_TYPE_WALK;
|
|
walk_state->owner_id = owner_id;
|
|
walk_state->origin = origin;
|
|
walk_state->method_desc = mth_desc;
|
|
walk_state->thread = thread;
|
|
|
|
walk_state->parser_state.start_op = origin;
|
|
|
|
/* Init the method args/local */
|
|
|
|
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
|
|
acpi_ds_method_data_init (walk_state);
|
|
#endif
|
|
|
|
/* Create an initial result stack entry */
|
|
|
|
status = acpi_ds_result_stack_push (walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
acpi_ut_release_to_cache (ACPI_MEM_LIST_WALK, walk_state);
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Put the new state at the head of the walk list */
|
|
|
|
if (thread) {
|
|
acpi_ds_push_walk_state (walk_state, thread);
|
|
}
|
|
|
|
return_PTR (walk_state);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_init_aml_walk
|
|
*
|
|
* PARAMETERS: walk_state - New state to be initialized
|
|
* Op - Current parse op
|
|
* method_node - Control method NS node, if any
|
|
* aml_start - Start of AML
|
|
* aml_length - Length of AML
|
|
* Params - Method args, if any
|
|
* return_obj_desc - Where to store a return object, if any
|
|
* pass_number - 1, 2, or 3
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_init_aml_walk (
|
|
struct acpi_walk_state *walk_state,
|
|
union acpi_parse_object *op,
|
|
struct acpi_namespace_node *method_node,
|
|
u8 *aml_start,
|
|
u32 aml_length,
|
|
struct acpi_parameter_info *info,
|
|
u32 pass_number)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_parse_state *parser_state = &walk_state->parser_state;
|
|
union acpi_parse_object *extra_op;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ds_init_aml_walk");
|
|
|
|
|
|
walk_state->parser_state.aml =
|
|
walk_state->parser_state.aml_start = aml_start;
|
|
walk_state->parser_state.aml_end =
|
|
walk_state->parser_state.pkg_end = aml_start + aml_length;
|
|
|
|
/* The next_op of the next_walk will be the beginning of the method */
|
|
|
|
walk_state->next_op = NULL;
|
|
|
|
if (info) {
|
|
if (info->parameter_type == ACPI_PARAM_GPE) {
|
|
walk_state->gpe_event_info = ACPI_CAST_PTR (struct acpi_gpe_event_info,
|
|
info->parameters);
|
|
}
|
|
else {
|
|
walk_state->params = info->parameters;
|
|
walk_state->caller_return_desc = &info->return_object;
|
|
}
|
|
}
|
|
|
|
status = acpi_ps_init_scope (&walk_state->parser_state, op);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
if (method_node) {
|
|
walk_state->parser_state.start_node = method_node;
|
|
walk_state->walk_type = ACPI_WALK_METHOD;
|
|
walk_state->method_node = method_node;
|
|
walk_state->method_desc = acpi_ns_get_attached_object (method_node);
|
|
|
|
/* Push start scope on scope stack and make it current */
|
|
|
|
status = acpi_ds_scope_stack_push (method_node, ACPI_TYPE_METHOD, walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Init the method arguments */
|
|
|
|
status = acpi_ds_method_data_init_args (walk_state->params, ACPI_METHOD_NUM_ARGS, walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* Setup the current scope.
|
|
* Find a Named Op that has a namespace node associated with it.
|
|
* search upwards from this Op. Current scope is the first
|
|
* Op with a namespace node.
|
|
*/
|
|
extra_op = parser_state->start_op;
|
|
while (extra_op && !extra_op->common.node) {
|
|
extra_op = extra_op->common.parent;
|
|
}
|
|
|
|
if (!extra_op) {
|
|
parser_state->start_node = NULL;
|
|
}
|
|
else {
|
|
parser_state->start_node = extra_op->common.node;
|
|
}
|
|
|
|
if (parser_state->start_node) {
|
|
/* Push start scope on scope stack and make it current */
|
|
|
|
status = acpi_ds_scope_stack_push (parser_state->start_node,
|
|
parser_state->start_node->type, walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
}
|
|
|
|
status = acpi_ds_init_callbacks (walk_state, pass_number);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_delete_walk_state
|
|
*
|
|
* PARAMETERS: walk_state - State to delete
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Delete a walk state including all internal data structures
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ds_delete_walk_state (
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_delete_walk_state", walk_state);
|
|
|
|
|
|
if (!walk_state) {
|
|
return;
|
|
}
|
|
|
|
if (walk_state->data_type != ACPI_DESC_TYPE_WALK) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p is not a valid walk state\n", walk_state));
|
|
return;
|
|
}
|
|
|
|
if (walk_state->parser_state.scope) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p walk still has a scope list\n", walk_state));
|
|
}
|
|
|
|
/* Always must free any linked control states */
|
|
|
|
while (walk_state->control_state) {
|
|
state = walk_state->control_state;
|
|
walk_state->control_state = state->common.next;
|
|
|
|
acpi_ut_delete_generic_state (state);
|
|
}
|
|
|
|
/* Always must free any linked parse states */
|
|
|
|
while (walk_state->scope_info) {
|
|
state = walk_state->scope_info;
|
|
walk_state->scope_info = state->common.next;
|
|
|
|
acpi_ut_delete_generic_state (state);
|
|
}
|
|
|
|
/* Always must free any stacked result states */
|
|
|
|
while (walk_state->results) {
|
|
state = walk_state->results;
|
|
walk_state->results = state->common.next;
|
|
|
|
acpi_ut_delete_generic_state (state);
|
|
}
|
|
|
|
acpi_ut_release_to_cache (ACPI_MEM_LIST_WALK, walk_state);
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
#ifdef ACPI_ENABLE_OBJECT_CACHE
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_delete_walk_state_cache
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Purge the global state object cache. Used during subsystem
|
|
* termination.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ds_delete_walk_state_cache (
|
|
void)
|
|
{
|
|
ACPI_FUNCTION_TRACE ("ds_delete_walk_state_cache");
|
|
|
|
|
|
acpi_ut_delete_generic_cache (ACPI_MEM_LIST_WALK);
|
|
return_VOID;
|
|
}
|
|
#endif
|
|
|
|
|
|
|