forked from luck/tmp_suning_uos_patched
a8357b0c95
Add 2010 copyright to all module headers and signons, including the Linux header. This affects virtually every file in the ACPICA core subsystem, iASL compiler, and all utilities. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
348 lines
10 KiB
C
348 lines
10 KiB
C
/*******************************************************************************
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*
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* Module Name: utstate - state object support procedures
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2010, Intel Corp.
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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 "accommon.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utstate")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_pkg_state_and_push
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*
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* PARAMETERS: Object - Object to be added to the new state
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* Action - Increment/Decrement
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* state_list - List the state will be added to
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new state and push it
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*
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******************************************************************************/
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acpi_status
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acpi_ut_create_pkg_state_and_push(void *internal_object,
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void *external_object,
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u16 index,
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union acpi_generic_state **state_list)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_ENTRY();
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state =
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acpi_ut_create_pkg_state(internal_object, external_object, index);
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if (!state) {
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return (AE_NO_MEMORY);
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}
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acpi_ut_push_generic_state(state_list, 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_ut_push_generic_state
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*
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* PARAMETERS: list_head - Head of the state stack
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* State - State object to push
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*
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* RETURN: None
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*
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* DESCRIPTION: Push a state object onto a state stack
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*
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******************************************************************************/
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void
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acpi_ut_push_generic_state(union acpi_generic_state **list_head,
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union acpi_generic_state *state)
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{
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ACPI_FUNCTION_TRACE(ut_push_generic_state);
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/* Push the state object onto the front of the list (stack) */
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state->common.next = *list_head;
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*list_head = state;
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_pop_generic_state
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*
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* PARAMETERS: list_head - Head of the state stack
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*
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* RETURN: The popped state object
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*
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* DESCRIPTION: Pop a state object from a state stack
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*
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******************************************************************************/
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union acpi_generic_state *acpi_ut_pop_generic_state(union acpi_generic_state
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**list_head)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_TRACE(ut_pop_generic_state);
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/* Remove the state object at the head of the list (stack) */
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state = *list_head;
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if (state) {
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/* Update the list head */
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*list_head = state->common.next;
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}
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return_PTR(state);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_generic_state
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*
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* PARAMETERS: None
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*
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* RETURN: The new state object. NULL on failure.
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*
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* DESCRIPTION: Create a generic state object. Attempt to obtain one from
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* the global state cache; If none available, create a new one.
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*
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******************************************************************************/
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union acpi_generic_state *acpi_ut_create_generic_state(void)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_ENTRY();
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state = acpi_os_acquire_object(acpi_gbl_state_cache);
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if (state) {
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/* Initialize */
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memset(state, 0, sizeof(union acpi_generic_state));
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state->common.descriptor_type = ACPI_DESC_TYPE_STATE;
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}
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return (state);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_thread_state
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*
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* PARAMETERS: None
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*
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* RETURN: New Thread State. NULL on failure
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*
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* DESCRIPTION: Create a "Thread State" - a flavor of the generic state used
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* to track per-thread info during method execution
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*
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******************************************************************************/
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struct acpi_thread_state *acpi_ut_create_thread_state(void)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_TRACE(ut_create_thread_state);
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/* Create the generic state object */
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state = acpi_ut_create_generic_state();
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if (!state) {
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return_PTR(NULL);
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}
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/* Init fields specific to the update struct */
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state->common.descriptor_type = ACPI_DESC_TYPE_STATE_THREAD;
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state->thread.thread_id = acpi_os_get_thread_id();
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/* Check for invalid thread ID - zero is very bad, it will break things */
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if (!state->thread.thread_id) {
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ACPI_ERROR((AE_INFO, "Invalid zero ID from AcpiOsGetThreadId"));
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state->thread.thread_id = (acpi_thread_id) 1;
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}
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return_PTR((struct acpi_thread_state *)state);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_update_state
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*
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* PARAMETERS: Object - Initial Object to be installed in the state
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* Action - Update action to be performed
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*
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* RETURN: New state object, null on failure
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*
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* DESCRIPTION: Create an "Update State" - a flavor of the generic state used
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* to update reference counts and delete complex objects such
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* as packages.
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*
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******************************************************************************/
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union acpi_generic_state *acpi_ut_create_update_state(union acpi_operand_object
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*object, u16 action)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_TRACE_PTR(ut_create_update_state, object);
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/* Create the generic state object */
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state = acpi_ut_create_generic_state();
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if (!state) {
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return_PTR(NULL);
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}
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/* Init fields specific to the update struct */
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state->common.descriptor_type = ACPI_DESC_TYPE_STATE_UPDATE;
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state->update.object = object;
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state->update.value = action;
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return_PTR(state);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_pkg_state
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*
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* PARAMETERS: Object - Initial Object to be installed in the state
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* Action - Update action to be performed
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*
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* RETURN: New state object, null on failure
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*
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* DESCRIPTION: Create a "Package State"
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*
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******************************************************************************/
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union acpi_generic_state *acpi_ut_create_pkg_state(void *internal_object,
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void *external_object,
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u16 index)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_TRACE_PTR(ut_create_pkg_state, internal_object);
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/* Create the generic state object */
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state = acpi_ut_create_generic_state();
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if (!state) {
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return_PTR(NULL);
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}
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/* Init fields specific to the update struct */
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state->common.descriptor_type = ACPI_DESC_TYPE_STATE_PACKAGE;
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state->pkg.source_object = (union acpi_operand_object *)internal_object;
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state->pkg.dest_object = external_object;
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state->pkg.index = index;
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state->pkg.num_packages = 1;
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return_PTR(state);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_control_state
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*
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* PARAMETERS: None
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*
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* RETURN: New state object, null on failure
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*
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* DESCRIPTION: Create a "Control State" - a flavor of the generic state used
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* to support nested IF/WHILE constructs in the AML.
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*
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******************************************************************************/
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union acpi_generic_state *acpi_ut_create_control_state(void)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_TRACE(ut_create_control_state);
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/* Create the generic state object */
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state = acpi_ut_create_generic_state();
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if (!state) {
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return_PTR(NULL);
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}
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/* Init fields specific to the control struct */
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state->common.descriptor_type = ACPI_DESC_TYPE_STATE_CONTROL;
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state->common.state = ACPI_CONTROL_CONDITIONAL_EXECUTING;
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return_PTR(state);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_generic_state
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*
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* PARAMETERS: State - The state object to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Release a state object to the state cache. NULL state objects
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* are ignored.
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*
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******************************************************************************/
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void acpi_ut_delete_generic_state(union acpi_generic_state *state)
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{
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ACPI_FUNCTION_TRACE(ut_delete_generic_state);
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/* Ignore null state */
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if (state) {
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(void)acpi_os_release_object(acpi_gbl_state_cache, state);
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}
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return_VOID;
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}
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