1 files changed, 376 insertions, 0 deletions
diff --git a/drivers/acpi/utilities/utstate.c b/drivers/acpi/utilities/utstate.c
new file mode 100644
index 00000000000..192e7ac9569
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+++ b/drivers/acpi/utilities/utstate.c
@@ -0,0 +1,376 @@
+/*******************************************************************************
+ *
+ * Module Name: utstate - state object support procedures
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+
+#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_TRACE ("ut_push_generic_state");
+
+
+	/* Push the state object onto the front of the list (stack) */
+
+	state->common.next = *list_head;
+	*list_head = state;
+
+	return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * 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_TRACE ("ut_pop_generic_state");
+
+
+	/* 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_PTR (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 */
+		memset(state, 0, sizeof(union acpi_generic_state));
+		state->common.data_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_TRACE ("ut_create_thread_state");
+
+
+	/* Create the generic state object */
+
+	state = acpi_ut_create_generic_state ();
+	if (!state) {
+		return_PTR (NULL);
+	}
+
+	/* Init fields specific to the update struct */
+
+	state->common.data_type = ACPI_DESC_TYPE_STATE_THREAD;
+	state->thread.thread_id = acpi_os_get_thread_id ();
+
+	return_PTR ((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_TRACE_PTR ("ut_create_update_state", object);
+
+
+	/* Create the generic state object */
+
+	state = acpi_ut_create_generic_state ();
+	if (!state) {
+		return_PTR (NULL);
+	}
+
+	/* Init fields specific to the update struct */
+
+	state->common.data_type = ACPI_DESC_TYPE_STATE_UPDATE;
+	state->update.object = object;
+	state->update.value  = action;
+
+	return_PTR (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_TRACE_PTR ("ut_create_pkg_state", internal_object);
+
+
+	/* Create the generic state object */
+
+	state = acpi_ut_create_generic_state ();
+	if (!state) {
+		return_PTR (NULL);
+	}
+
+	/* Init fields specific to the update struct */
+
+	state->common.data_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_PTR (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_TRACE ("ut_create_control_state");
+
+
+	/* Create the generic state object */
+
+	state = acpi_ut_create_generic_state ();
+	if (!state) {
+		return_PTR (NULL);
+	}
+
+	/* Init fields specific to the control struct */
+
+	state->common.data_type = ACPI_DESC_TYPE_STATE_CONTROL;
+	state->common.state     = ACPI_CONTROL_CONDITIONAL_EXECUTING;
+
+	return_PTR (state);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_delete_generic_state
+ *
+ * PARAMETERS:  State               - The state object to be deleted
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Put a state object back into the global state cache.  The object
+ *              is not actually freed at this time.
+ *
+ ******************************************************************************/
+
+void
+acpi_ut_delete_generic_state (
+	union acpi_generic_state        *state)
+{
+	ACPI_FUNCTION_TRACE ("ut_delete_generic_state");
+
+
+	(void) acpi_os_release_object (acpi_gbl_state_cache, state);
+	return_VOID;
+}
+
+