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-rw-r--r--drivers/acpi/dispatcher/dswstate.c1100
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diff --git a/drivers/acpi/dispatcher/dswstate.c b/drivers/acpi/dispatcher/dswstate.c
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index 000000000000..e555b3fbd5e5
--- /dev/null
+++ b/drivers/acpi/dispatcher/dswstate.c
@@ -0,0 +1,1100 @@
+/******************************************************************************
+ *
+ * Module Name: dswstate - Dispatcher parse tree walk management routines
+ *
+ *****************************************************************************/
+
+/*
+ * 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>
+#include <acpi/acparser.h>
+#include <acpi/acdispat.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT ACPI_DISPATCHER
+ ACPI_MODULE_NAME ("dswstate")
+
+
+#ifdef ACPI_FUTURE_USAGE
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_insert
+ *
+ * PARAMETERS: Object - Object to push
+ * Index - Where to insert the object
+ * walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Insert an object onto this walk's result stack
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_insert (
+ void *object,
+ u32 index,
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_generic_state *state;
+
+
+ ACPI_FUNCTION_NAME ("ds_result_insert");
+
+
+ state = walk_state->results;
+ if (!state) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
+ walk_state));
+ return (AE_NOT_EXIST);
+ }
+
+ if (index >= ACPI_OBJ_NUM_OPERANDS) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Index out of range: %X Obj=%p State=%p Num=%X\n",
+ index, object, walk_state, state->results.num_results));
+ return (AE_BAD_PARAMETER);
+ }
+
+ if (!object) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Null Object! Index=%X Obj=%p State=%p Num=%X\n",
+ index, object, walk_state, state->results.num_results));
+ return (AE_BAD_PARAMETER);
+ }
+
+ state->results.obj_desc [index] = object;
+ state->results.num_results++;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
+ object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
+ walk_state, state->results.num_results, walk_state->current_result));
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_remove
+ *
+ * PARAMETERS: Object - Where to return the popped object
+ * Index - Where to extract the object
+ * walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
+ * other words, this is a FIFO.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_remove (
+ union acpi_operand_object **object,
+ u32 index,
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_generic_state *state;
+
+
+ ACPI_FUNCTION_NAME ("ds_result_remove");
+
+
+ state = walk_state->results;
+ if (!state) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
+ walk_state));
+ return (AE_NOT_EXIST);
+ }
+
+ if (index >= ACPI_OBJ_MAX_OPERAND) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Index out of range: %X State=%p Num=%X\n",
+ index, walk_state, state->results.num_results));
+ }
+
+ /* Check for a valid result object */
+
+ if (!state->results.obj_desc [index]) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Null operand! State=%p #Ops=%X, Index=%X\n",
+ walk_state, state->results.num_results, index));
+ return (AE_AML_NO_RETURN_VALUE);
+ }
+
+ /* Remove the object */
+
+ state->results.num_results--;
+
+ *object = state->results.obj_desc [index];
+ state->results.obj_desc [index] = NULL;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "Obj=%p [%s] Index=%X State=%p Num=%X\n",
+ *object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
+ index, walk_state, state->results.num_results));
+
+ return (AE_OK);
+}
+
+#endif /* ACPI_FUTURE_USAGE */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_pop
+ *
+ * PARAMETERS: Object - Where to return the popped object
+ * walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
+ * other words, this is a FIFO.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_pop (
+ union acpi_operand_object **object,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_native_uint index;
+ union acpi_generic_state *state;
+
+
+ ACPI_FUNCTION_NAME ("ds_result_pop");
+
+
+ state = walk_state->results;
+ if (!state) {
+ return (AE_OK);
+ }
+
+ if (!state->results.num_results) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Result stack is empty! State=%p\n",
+ walk_state));
+ return (AE_AML_NO_RETURN_VALUE);
+ }
+
+ /* Remove top element */
+
+ state->results.num_results--;
+
+ for (index = ACPI_OBJ_NUM_OPERANDS; index; index--) {
+ /* Check for a valid result object */
+
+ if (state->results.obj_desc [index -1]) {
+ *object = state->results.obj_desc [index -1];
+ state->results.obj_desc [index -1] = NULL;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] Index=%X State=%p Num=%X\n",
+ *object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
+ (u32) index -1, walk_state, state->results.num_results));
+
+ return (AE_OK);
+ }
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n", walk_state));
+ return (AE_AML_NO_RETURN_VALUE);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_pop_from_bottom
+ *
+ * PARAMETERS: Object - Where to return the popped object
+ * walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
+ * other words, this is a FIFO.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_pop_from_bottom (
+ union acpi_operand_object **object,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_native_uint index;
+ union acpi_generic_state *state;
+
+
+ ACPI_FUNCTION_NAME ("ds_result_pop_from_bottom");
+
+
+ state = walk_state->results;
+ if (!state) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Warning: No result object pushed! State=%p\n", walk_state));
+ return (AE_NOT_EXIST);
+ }
+
+ if (!state->results.num_results) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n", walk_state));
+ return (AE_AML_NO_RETURN_VALUE);
+ }
+
+ /* Remove Bottom element */
+
+ *object = state->results.obj_desc [0];
+
+ /* Push entire stack down one element */
+
+ for (index = 0; index < state->results.num_results; index++) {
+ state->results.obj_desc [index] = state->results.obj_desc [index + 1];
+ }
+
+ state->results.num_results--;
+
+ /* Check for a valid result object */
+
+ if (!*object) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null operand! State=%p #Ops=%X, Index=%X\n",
+ walk_state, state->results.num_results, (u32) index));
+ return (AE_AML_NO_RETURN_VALUE);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s], Results=%p State=%p\n",
+ *object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
+ state, walk_state));
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_push
+ *
+ * PARAMETERS: Object - Where to return the popped object
+ * walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Push an object onto the current result stack
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_push (
+ union acpi_operand_object *object,
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_generic_state *state;
+
+
+ ACPI_FUNCTION_NAME ("ds_result_push");
+
+
+ state = walk_state->results;
+ if (!state) {
+ ACPI_REPORT_ERROR (("No result stack frame during push\n"));
+ return (AE_AML_INTERNAL);
+ }
+
+ if (state->results.num_results == ACPI_OBJ_NUM_OPERANDS) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Result stack overflow: Obj=%p State=%p Num=%X\n",
+ object, walk_state, state->results.num_results));
+ return (AE_STACK_OVERFLOW);
+ }
+
+ if (!object) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Object! Obj=%p State=%p Num=%X\n",
+ object, walk_state, state->results.num_results));
+ return (AE_BAD_PARAMETER);
+ }
+
+ state->results.obj_desc [state->results.num_results] = object;
+ state->results.num_results++;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
+ object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
+ walk_state, state->results.num_results, walk_state->current_result));
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_stack_push
+ *
+ * PARAMETERS: walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Push an object onto the walk_state result stack.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_stack_push (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_generic_state *state;
+
+ ACPI_FUNCTION_NAME ("ds_result_stack_push");
+
+
+ state = acpi_ut_create_generic_state ();
+ if (!state) {
+ return (AE_NO_MEMORY);
+ }
+
+ state->common.data_type = ACPI_DESC_TYPE_STATE_RESULT;
+ acpi_ut_push_generic_state (&walk_state->results, state);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n",
+ state, walk_state));
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_result_stack_pop
+ *
+ * PARAMETERS: walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Pop an object off of the walk_state result stack.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_result_stack_pop (
+ struct acpi_walk_state *walk_state)
+{
+ union acpi_generic_state *state;
+
+ ACPI_FUNCTION_NAME ("ds_result_stack_pop");
+
+
+ /* Check for stack underflow */
+
+ if (walk_state->results == NULL) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Underflow - State=%p\n",
+ walk_state));
+ return (AE_AML_NO_OPERAND);
+ }
+
+ state = acpi_ut_pop_generic_state (&walk_state->results);
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
+ "Result=%p remaining_results=%X State=%p\n",
+ state, state->results.num_results, walk_state));
+
+ acpi_ut_delete_generic_state (state);
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_obj_stack_delete_all
+ *
+ * PARAMETERS: walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Clear the object stack by deleting all objects that are on it.
+ * Should be used with great care, if at all!
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_ds_obj_stack_delete_all (
+ struct acpi_walk_state *walk_state)
+{
+ u32 i;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_delete_all", walk_state);
+
+
+ /* The stack size is configurable, but fixed */
+
+ for (i = 0; i < ACPI_OBJ_NUM_OPERANDS; i++) {
+ if (walk_state->operands[i]) {
+ acpi_ut_remove_reference (walk_state->operands[i]);
+ walk_state->operands[i] = NULL;
+ }
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+#endif /* ACPI_FUTURE_USAGE */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_obj_stack_push
+ *
+ * PARAMETERS: Object - Object to push
+ * walk_state - Current Walk state
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Push an object onto this walk's object/operand stack
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_obj_stack_push (
+ void *object,
+ struct acpi_walk_state *walk_state)
+{
+ ACPI_FUNCTION_NAME ("ds_obj_stack_push");
+
+
+ /* Check for stack overflow */
+
+ if (walk_state->num_operands >= ACPI_OBJ_NUM_OPERANDS) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "overflow! Obj=%p State=%p #Ops=%X\n",
+ object, walk_state, walk_state->num_operands));
+ return (AE_STACK_OVERFLOW);
+ }
+
+ /* Put the object onto the stack */
+
+ walk_state->operands [walk_state->num_operands] = object;
+ walk_state->num_operands++;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
+ object, acpi_ut_get_object_type_name ((union acpi_operand_object *) object),
+ walk_state, walk_state->num_operands));
+
+ return (AE_OK);
+}
+
+
+#if 0
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_obj_stack_pop_object
+ *
+ * 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_object (
+ union acpi_operand_object **object,
+ struct acpi_walk_state *walk_state)
+{
+ ACPI_FUNCTION_NAME ("ds_obj_stack_pop_object");
+
+
+ /* Check for stack underflow */
+
+ if (walk_state->num_operands == 0) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Missing operand/stack empty! State=%p #Ops=%X\n",
+ walk_state, walk_state->num_operands));
+ *object = NULL;
+ 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
+
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.