343 lines
9.8 KiB
C
343 lines
9.8 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: utstate - state object support procedures
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2013, Intel Corp.
|
|
* 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 "accommon.h"
|
|
|
|
#define _COMPONENT ACPI_UTILITIES
|
|
ACPI_MODULE_NAME("utstate")
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_pkg_state_and_push
|
|
*
|
|
* PARAMETERS: object - Object to be added to the new state
|
|
* action - Increment/Decrement
|
|
* state_list - List the state will be added to
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create a new state and push it
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_ut_create_pkg_state_and_push(void *internal_object,
|
|
void *external_object,
|
|
u16 index,
|
|
union acpi_generic_state **state_list)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
state =
|
|
acpi_ut_create_pkg_state(internal_object, external_object, index);
|
|
if (!state) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
acpi_ut_push_generic_state(state_list, state);
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_push_generic_state
|
|
*
|
|
* PARAMETERS: list_head - Head of the state stack
|
|
* state - State object to push
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Push a state object onto a state stack
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ut_push_generic_state(union acpi_generic_state **list_head,
|
|
union acpi_generic_state *state)
|
|
{
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Push the state object onto the front of the list (stack) */
|
|
|
|
state->common.next = *list_head;
|
|
*list_head = state;
|
|
return;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_pop_generic_state
|
|
*
|
|
* PARAMETERS: list_head - Head of the state stack
|
|
*
|
|
* RETURN: The popped state object
|
|
*
|
|
* DESCRIPTION: Pop a state object from a state stack
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_generic_state *acpi_ut_pop_generic_state(union acpi_generic_state
|
|
**list_head)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Remove the state object at the head of the list (stack) */
|
|
|
|
state = *list_head;
|
|
if (state) {
|
|
|
|
/* Update the list head */
|
|
|
|
*list_head = state->common.next;
|
|
}
|
|
|
|
return (state);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_generic_state
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: The new state object. NULL on failure.
|
|
*
|
|
* DESCRIPTION: Create a generic state object. Attempt to obtain one from
|
|
* the global state cache; If none available, create a new one.
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_generic_state *acpi_ut_create_generic_state(void)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
state = acpi_os_acquire_object(acpi_gbl_state_cache);
|
|
if (state) {
|
|
|
|
/* Initialize */
|
|
state->common.descriptor_type = ACPI_DESC_TYPE_STATE;
|
|
}
|
|
|
|
return (state);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_thread_state
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: New Thread State. NULL on failure
|
|
*
|
|
* DESCRIPTION: Create a "Thread State" - a flavor of the generic state used
|
|
* to track per-thread info during method execution
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_thread_state *acpi_ut_create_thread_state(void)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Create the generic state object */
|
|
|
|
state = acpi_ut_create_generic_state();
|
|
if (!state) {
|
|
return (NULL);
|
|
}
|
|
|
|
/* Init fields specific to the update struct */
|
|
|
|
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_THREAD;
|
|
state->thread.thread_id = acpi_os_get_thread_id();
|
|
|
|
/* Check for invalid thread ID - zero is very bad, it will break things */
|
|
|
|
if (!state->thread.thread_id) {
|
|
ACPI_ERROR((AE_INFO, "Invalid zero ID from AcpiOsGetThreadId"));
|
|
state->thread.thread_id = (acpi_thread_id) 1;
|
|
}
|
|
|
|
return ((struct acpi_thread_state *)state);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_update_state
|
|
*
|
|
* PARAMETERS: object - Initial Object to be installed in the state
|
|
* action - Update action to be performed
|
|
*
|
|
* RETURN: New state object, null on failure
|
|
*
|
|
* DESCRIPTION: Create an "Update State" - a flavor of the generic state used
|
|
* to update reference counts and delete complex objects such
|
|
* as packages.
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_generic_state *acpi_ut_create_update_state(union acpi_operand_object
|
|
*object, u16 action)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Create the generic state object */
|
|
|
|
state = acpi_ut_create_generic_state();
|
|
if (!state) {
|
|
return (NULL);
|
|
}
|
|
|
|
/* Init fields specific to the update struct */
|
|
|
|
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_UPDATE;
|
|
state->update.object = object;
|
|
state->update.value = action;
|
|
return (state);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_pkg_state
|
|
*
|
|
* PARAMETERS: object - Initial Object to be installed in the state
|
|
* action - Update action to be performed
|
|
*
|
|
* RETURN: New state object, null on failure
|
|
*
|
|
* DESCRIPTION: Create a "Package State"
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_generic_state *acpi_ut_create_pkg_state(void *internal_object,
|
|
void *external_object,
|
|
u16 index)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Create the generic state object */
|
|
|
|
state = acpi_ut_create_generic_state();
|
|
if (!state) {
|
|
return (NULL);
|
|
}
|
|
|
|
/* Init fields specific to the update struct */
|
|
|
|
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_PACKAGE;
|
|
state->pkg.source_object = (union acpi_operand_object *)internal_object;
|
|
state->pkg.dest_object = external_object;
|
|
state->pkg.index = index;
|
|
state->pkg.num_packages = 1;
|
|
return (state);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_control_state
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: New state object, null on failure
|
|
*
|
|
* DESCRIPTION: Create a "Control State" - a flavor of the generic state used
|
|
* to support nested IF/WHILE constructs in the AML.
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_generic_state *acpi_ut_create_control_state(void)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Create the generic state object */
|
|
|
|
state = acpi_ut_create_generic_state();
|
|
if (!state) {
|
|
return (NULL);
|
|
}
|
|
|
|
/* Init fields specific to the control struct */
|
|
|
|
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_CONTROL;
|
|
state->common.state = ACPI_CONTROL_CONDITIONAL_EXECUTING;
|
|
return (state);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_delete_generic_state
|
|
*
|
|
* PARAMETERS: state - The state object to be deleted
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Release a state object to the state cache. NULL state objects
|
|
* are ignored.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ut_delete_generic_state(union acpi_generic_state *state)
|
|
{
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Ignore null state */
|
|
|
|
if (state) {
|
|
(void)acpi_os_release_object(acpi_gbl_state_cache, state);
|
|
}
|
|
return;
|
|
}
|