Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 744 insertions, 0 deletions

diff --git a/drivers/acpi/dispatcher/dsutils.c b/drivers/acpi/dispatcher/dsutils.c
new file mode 100644
index 000000000000..462c5d83e747
--- /dev/null
+++ b/drivers/acpi/dispatcher/dsutils.c
@@ -0,0 +1,744 @@
+/*******************************************************************************
+ *
+ * Module Name: dsutils - Dispatcher utilities
+ *
+ ******************************************************************************/
+
+/*
+ * 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/amlcode.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acdebug.h>
+
+#define _COMPONENT          ACPI_DISPATCHER
+         ACPI_MODULE_NAME    ("dsutils")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_clear_implicit_return
+ *
+ * PARAMETERS:  walk_state          - Current State
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Clear and remove a reference on an implicit return value.  Used
+ *              to delete "stale" return values (if enabled, the return value
+ *              from every operator is saved at least momentarily, in case the
+ *              parent method exits.)
+ *
+ ******************************************************************************/
+
+void
+acpi_ds_clear_implicit_return (
+        struct acpi_walk_state          *walk_state)
+{
+        ACPI_FUNCTION_NAME ("ds_clear_implicit_return");
+
+
+        /*
+         * Slack must be enabled for this feature
+         */
+        if (!acpi_gbl_enable_interpreter_slack) {
+                return;
+        }
+
+        if (walk_state->implicit_return_obj) {
+                /*
+                 * Delete any "stale" implicit return. However, in
+                 * complex statements, the implicit return value can be
+                 * bubbled up several levels.
+                 */
+                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
+                        "Removing reference on stale implicit return obj %p\n",
+                        walk_state->implicit_return_obj));
+
+                acpi_ut_remove_reference (walk_state->implicit_return_obj);
+                walk_state->implicit_return_obj = NULL;
+        }
+}
+
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_do_implicit_return
+ *
+ * PARAMETERS:  return_desc         - The return value
+ *              walk_state          - Current State
+ *              add_reference       - True if a reference should be added to the
+ *                                    return object
+ *
+ * RETURN:      TRUE if implicit return enabled, FALSE otherwise
+ *
+ * DESCRIPTION: Implements the optional "implicit return".  We save the result
+ *              of every ASL operator and control method invocation in case the
+ *              parent method exit.  Before storing a new return value, we
+ *              delete the previous return value.
+ *
+ ******************************************************************************/
+
+u8
+acpi_ds_do_implicit_return (
+        union acpi_operand_object       *return_desc,
+        struct acpi_walk_state          *walk_state,
+        u8                              add_reference)
+{
+        ACPI_FUNCTION_NAME ("ds_do_implicit_return");
+
+
+        /*
+         * Slack must be enabled for this feature, and we must
+         * have a valid return object
+         */
+        if ((!acpi_gbl_enable_interpreter_slack) ||
+                (!return_desc)) {
+                return (FALSE);
+        }
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
+                        "Result %p will be implicitly returned; Prev=%p\n",
+                        return_desc,
+                        walk_state->implicit_return_obj));
+
+        /*
+         * Delete any "stale" implicit return value first. However, in
+         * complex statements, the implicit return value can be
+         * bubbled up several levels, so we don't clear the value if it
+         * is the same as the return_desc.
+         */
+        if (walk_state->implicit_return_obj) {
+                if (walk_state->implicit_return_obj == return_desc) {
+                        return (TRUE);
+                }
+                acpi_ds_clear_implicit_return (walk_state);
+        }
+
+        /* Save the implicit return value, add a reference if requested */
+
+        walk_state->implicit_return_obj = return_desc;
+        if (add_reference) {
+                acpi_ut_add_reference (return_desc);
+        }
+
+        return (TRUE);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_is_result_used
+ *
+ * PARAMETERS:  Op                  - Current Op
+ *              walk_state          - Current State
+ *
+ * RETURN:      TRUE if result is used, FALSE otherwise
+ *
+ * DESCRIPTION: Check if a result object will be used by the parent
+ *
+ ******************************************************************************/
+
+u8
+acpi_ds_is_result_used (
+        union acpi_parse_object         *op,
+        struct acpi_walk_state          *walk_state)
+{
+        const struct acpi_opcode_info   *parent_info;
+
+        ACPI_FUNCTION_TRACE_PTR ("ds_is_result_used", op);
+
+
+        /* Must have both an Op and a Result Object */
+
+        if (!op) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
+                return_VALUE (TRUE);
+        }
+
+        /*
+         * We know that this operator is not a
+         * Return() operator (would not come here.) The following code is the
+         * optional support for a so-called "implicit return". Some AML code
+         * assumes that the last value of the method is "implicitly" returned
+         * to the caller. Just save the last result as the return value.
+         * NOTE: this is optional because the ASL language does not actually
+         * support this behavior.
+         */
+        acpi_ds_do_implicit_return (walk_state->result_obj, walk_state, TRUE);
+
+        /*
+         * Now determine if the parent will use the result
+         *
+         * If there is no parent, or the parent is a scope_op, we are executing
+         * at the method level. An executing method typically has no parent,
+         * since each method is parsed separately.  A method invoked externally
+         * via execute_control_method has a scope_op as the parent.
+         */
+        if ((!op->common.parent) ||
+                (op->common.parent->common.aml_opcode == AML_SCOPE_OP)) {
+                /* No parent, the return value cannot possibly be used */
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "At Method level, result of [%s] not used\n",
+                                acpi_ps_get_opcode_name (op->common.aml_opcode)));
+                return_VALUE (FALSE);
+        }
+
+        /* Get info on the parent. The root_op is AML_SCOPE */
+
+        parent_info = acpi_ps_get_opcode_info (op->common.parent->common.aml_opcode);
+        if (parent_info->class == AML_CLASS_UNKNOWN) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown parent opcode. Op=%p\n", op));
+                return_VALUE (FALSE);
+        }
+
+        /*
+         * Decide what to do with the result based on the parent.  If
+         * the parent opcode will not use the result, delete the object.
+         * Otherwise leave it as is, it will be deleted when it is used
+         * as an operand later.
+         */
+        switch (parent_info->class) {
+        case AML_CLASS_CONTROL:
+
+                switch (op->common.parent->common.aml_opcode) {
+                case AML_RETURN_OP:
+
+                        /* Never delete the return value associated with a return opcode */
+
+                        goto result_used;
+
+                case AML_IF_OP:
+                case AML_WHILE_OP:
+
+                        /*
+                         * If we are executing the predicate AND this is the predicate op,
+                         * we will use the return value
+                         */
+                        if ((walk_state->control_state->common.state == ACPI_CONTROL_PREDICATE_EXECUTING) &&
+                                (walk_state->control_state->control.predicate_op == op)) {
+                                goto result_used;
+                        }
+                        break;
+
+                default:
+                        /* Ignore other control opcodes */
+                        break;
+                }
+
+                /* The general control opcode returns no result */
+
+                goto result_not_used;
+
+
+        case AML_CLASS_CREATE:
+
+                /*
+                 * These opcodes allow term_arg(s) as operands and therefore
+                 * the operands can be method calls.  The result is used.
+                 */
+                goto result_used;
+
+
+        case AML_CLASS_NAMED_OBJECT:
+
+                if ((op->common.parent->common.aml_opcode == AML_REGION_OP)      ||
+                        (op->common.parent->common.aml_opcode == AML_DATA_REGION_OP) ||
+                        (op->common.parent->common.aml_opcode == AML_PACKAGE_OP)     ||
+                        (op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP) ||
+                        (op->common.parent->common.aml_opcode == AML_BUFFER_OP)      ||
+                        (op->common.parent->common.aml_opcode == AML_INT_EVAL_SUBTREE_OP)) {
+                        /*
+                         * These opcodes allow term_arg(s) as operands and therefore
+                         * the operands can be method calls.  The result is used.
+                         */
+                        goto result_used;
+                }
+
+                goto result_not_used;
+
+
+        default:
+
+                /*
+                 * In all other cases. the parent will actually use the return
+                 * object, so keep it.
+                 */
+                goto result_used;
+        }
+
+
+result_used:
+        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] used by Parent [%s] Op=%p\n",
+                        acpi_ps_get_opcode_name (op->common.aml_opcode),
+                        acpi_ps_get_opcode_name (op->common.parent->common.aml_opcode), op));
+
+        return_VALUE (TRUE);
+
+
+result_not_used:
+        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] not used by Parent [%s] Op=%p\n",
+                        acpi_ps_get_opcode_name (op->common.aml_opcode),
+                        acpi_ps_get_opcode_name (op->common.parent->common.aml_opcode), op));
+
+        return_VALUE (FALSE);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_delete_result_if_not_used
+ *
+ * PARAMETERS:  Op              - Current parse Op
+ *              result_obj      - Result of the operation
+ *              walk_state      - Current state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Used after interpretation of an opcode.  If there is an internal
+ *              result descriptor, check if the parent opcode will actually use
+ *              this result.  If not, delete the result now so that it will
+ *              not become orphaned.
+ *
+ ******************************************************************************/
+
+void
+acpi_ds_delete_result_if_not_used (
+        union acpi_parse_object         *op,
+        union acpi_operand_object       *result_obj,
+        struct acpi_walk_state          *walk_state)
+{
+        union acpi_operand_object       *obj_desc;
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ds_delete_result_if_not_used", result_obj);
+
+
+        if (!op) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
+                return_VOID;
+        }
+
+        if (!result_obj) {
+                return_VOID;
+        }
+
+        if (!acpi_ds_is_result_used (op, walk_state)) {
+                /* Must pop the result stack (obj_desc should be equal to result_obj) */
+
+                status = acpi_ds_result_pop (&obj_desc, walk_state);
+                if (ACPI_SUCCESS (status)) {
+                        acpi_ut_remove_reference (result_obj);
+                }
+        }
+
+        return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_resolve_operands
+ *
+ * PARAMETERS:  walk_state          - Current walk state with operands on stack
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Resolve all operands to their values.  Used to prepare
+ *              arguments to a control method invocation (a call from one
+ *              method to another.)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_resolve_operands (
+        struct acpi_walk_state          *walk_state)
+{
+        u32                             i;
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ds_resolve_operands", walk_state);
+
+
+        /*
+         * Attempt to resolve each of the valid operands
+         * Method arguments are passed by reference, not by value.  This means
+         * that the actual objects are passed, not copies of the objects.
+         */
+        for (i = 0; i < walk_state->num_operands; i++) {
+                status = acpi_ex_resolve_to_value (&walk_state->operands[i], walk_state);
+                if (ACPI_FAILURE (status)) {
+                        break;
+                }
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_clear_operands
+ *
+ * PARAMETERS:  walk_state          - Current walk state with operands on stack
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Clear all operands on the current walk state operand stack.
+ *
+ ******************************************************************************/
+
+void
+acpi_ds_clear_operands (
+        struct acpi_walk_state          *walk_state)
+{
+        u32                             i;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ds_clear_operands", walk_state);
+
+
+        /* Remove a reference on each operand on the stack */
+
+        for (i = 0; i < walk_state->num_operands; i++) {
+                /*
+                 * Remove a reference to all operands, including both
+                 * "Arguments" and "Targets".
+                 */
+                acpi_ut_remove_reference (walk_state->operands[i]);
+                walk_state->operands[i] = NULL;
+        }
+
+        walk_state->num_operands = 0;
+        return_VOID;
+}
+#endif
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_create_operand
+ *
+ * PARAMETERS:  walk_state      - Current walk state
+ *              Arg             - Parse object for the argument
+ *              arg_index       - Which argument (zero based)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Translate a parse tree object that is an argument to an AML
+ *              opcode to the equivalent interpreter object.  This may include
+ *              looking up a name or entering a new name into the internal
+ *              namespace.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_operand (
+        struct acpi_walk_state          *walk_state,
+        union acpi_parse_object         *arg,
+        u32                             arg_index)
+{
+        acpi_status                     status = AE_OK;
+        char                            *name_string;
+        u32                             name_length;
+        union acpi_operand_object       *obj_desc;
+        union acpi_parse_object         *parent_op;
+        u16                             opcode;
+        acpi_interpreter_mode           interpreter_mode;
+        const struct acpi_opcode_info   *op_info;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ds_create_operand", arg);
+
+
+        /* A valid name must be looked up in the namespace */
+
+        if ((arg->common.aml_opcode == AML_INT_NAMEPATH_OP) &&
+                (arg->common.value.string)) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", arg));
+
+                /* Get the entire name string from the AML stream */
+
+                status = acpi_ex_get_name_string (ACPI_TYPE_ANY, arg->common.value.buffer,
+                                  &name_string, &name_length);
+
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+
+                /* All prefixes have been handled, and the name is in name_string */
+
+                /*
+                 * Special handling for buffer_field declarations. This is a deferred
+                 * opcode that unfortunately defines the field name as the last
+                 * parameter instead of the first.  We get here when we are performing
+                 * the deferred execution, so the actual name of the field is already
+                 * in the namespace.  We don't want to attempt to look it up again
+                 * because we may be executing in a different scope than where the
+                 * actual opcode exists.
+                 */
+                if ((walk_state->deferred_node) &&
+                        (walk_state->deferred_node->type == ACPI_TYPE_BUFFER_FIELD) &&
+                        (arg_index != 0)) {
+                        obj_desc = ACPI_CAST_PTR (union acpi_operand_object, walk_state->deferred_node);
+                        status = AE_OK;
+                }
+                else    /* All other opcodes */ {
+                        /*
+                         * Differentiate between a namespace "create" operation
+                         * versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
+                         * IMODE_EXECUTE) in order to support the creation of
+                         * namespace objects during the execution of control methods.
+                         */
+                        parent_op = arg->common.parent;
+                        op_info = acpi_ps_get_opcode_info (parent_op->common.aml_opcode);
+                        if ((op_info->flags & AML_NSNODE) &&
+                                (parent_op->common.aml_opcode != AML_INT_METHODCALL_OP) &&
+                                (parent_op->common.aml_opcode != AML_REGION_OP) &&
+                                (parent_op->common.aml_opcode != AML_INT_NAMEPATH_OP)) {
+                                /* Enter name into namespace if not found */
+
+                                interpreter_mode = ACPI_IMODE_LOAD_PASS2;
+                        }
+                        else {
+                                /* Return a failure if name not found */
+
+                                interpreter_mode = ACPI_IMODE_EXECUTE;
+                        }
+
+                        status = acpi_ns_lookup (walk_state->scope_info, name_string,
+                                         ACPI_TYPE_ANY, interpreter_mode,
+                                         ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
+                                         walk_state,
+                                         ACPI_CAST_INDIRECT_PTR (struct acpi_namespace_node, &obj_desc));
+                        /*
+                         * The only case where we pass through (ignore) a NOT_FOUND
+                         * error is for the cond_ref_of opcode.
+                         */
+                        if (status == AE_NOT_FOUND) {
+                                if (parent_op->common.aml_opcode == AML_COND_REF_OF_OP) {
+                                        /*
+                                         * For the Conditional Reference op, it's OK if
+                                         * the name is not found;  We just need a way to
+                                         * indicate this to the interpreter, set the
+                                         * object to the root
+                                         */
+                                        obj_desc = ACPI_CAST_PTR (union acpi_operand_object, acpi_gbl_root_node);
+                                        status = AE_OK;
+                                }
+                                else {
+                                        /*
+                                         * We just plain didn't find it -- which is a
+                                         * very serious error at this point
+                                         */
+                                        status = AE_AML_NAME_NOT_FOUND;
+                                }
+                        }
+
+                        if (ACPI_FAILURE (status)) {
+                                ACPI_REPORT_NSERROR (name_string, status);
+                        }
+                }
+
+                /* Free the namestring created above */
+
+                ACPI_MEM_FREE (name_string);
+
+                /* Check status from the lookup */
+
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+
+                /* Put the resulting object onto the current object stack */
+
+                status = acpi_ds_obj_stack_push (obj_desc, walk_state);
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+                ACPI_DEBUGGER_EXEC (acpi_db_display_argument_object (obj_desc, walk_state));
+        }
+        else {
+                /* Check for null name case */
+
+                if (arg->common.aml_opcode == AML_INT_NAMEPATH_OP) {
+                        /*
+                         * If the name is null, this means that this is an
+                         * optional result parameter that was not specified
+                         * in the original ASL.  Create a Zero Constant for a
+                         * placeholder.  (Store to a constant is a Noop.)
+                         */
+                        opcode = AML_ZERO_OP;       /* Has no arguments! */
+
+                        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Null namepath: Arg=%p\n", arg));
+                }
+                else {
+                        opcode = arg->common.aml_opcode;
+                }
+
+                /* Get the object type of the argument */
+
+                op_info = acpi_ps_get_opcode_info (opcode);
+                if (op_info->object_type == ACPI_TYPE_INVALID) {
+                        return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
+                }
+
+                if (op_info->flags & AML_HAS_RETVAL) {
+                        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
+                                "Argument previously created, already stacked \n"));
+
+                        ACPI_DEBUGGER_EXEC (acpi_db_display_argument_object (
+                                walk_state->operands [walk_state->num_operands - 1], walk_state));
+
+                        /*
+                         * Use value that was already previously returned
+                         * by the evaluation of this argument
+                         */
+                        status = acpi_ds_result_pop_from_bottom (&obj_desc, walk_state);
+                        if (ACPI_FAILURE (status)) {
+                                /*
+                                 * Only error is underflow, and this indicates
+                                 * a missing or null operand!
+                                 */
+                                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Missing or null operand, %s\n",
+                                        acpi_format_exception (status)));
+                                return_ACPI_STATUS (status);
+                        }
+                }
+                else {
+                        /* Create an ACPI_INTERNAL_OBJECT for the argument */
+
+                        obj_desc = acpi_ut_create_internal_object (op_info->object_type);
+                        if (!obj_desc) {
+                                return_ACPI_STATUS (AE_NO_MEMORY);
+                        }
+
+                        /* Initialize the new object */
+
+                        status = acpi_ds_init_object_from_op (walk_state, arg,
+                                         opcode, &obj_desc);
+                        if (ACPI_FAILURE (status)) {
+                                acpi_ut_delete_object_desc (obj_desc);
+                                return_ACPI_STATUS (status);
+                        }
+                }
+
+                /* Put the operand object on the object stack */
+
+                status = acpi_ds_obj_stack_push (obj_desc, walk_state);
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+
+                ACPI_DEBUGGER_EXEC (acpi_db_display_argument_object (obj_desc, walk_state));
+        }
+
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_create_operands
+ *
+ * PARAMETERS:  walk_state          - Current state
+ *              first_arg           - First argument of a parser argument tree
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an operator's arguments from a parse tree format to
+ *              namespace objects and place those argument object on the object
+ *              stack in preparation for evaluation by the interpreter.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_operands (
+        struct acpi_walk_state          *walk_state,
+        union acpi_parse_object         *first_arg)
+{
+        acpi_status                     status = AE_OK;
+        union acpi_parse_object         *arg;
+        u32                             arg_count = 0;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ds_create_operands", first_arg);
+
+
+        /* For all arguments in the list... */
+
+        arg = first_arg;
+        while (arg) {
+                status = acpi_ds_create_operand (walk_state, arg, arg_count);
+                if (ACPI_FAILURE (status)) {
+                        goto cleanup;
+                }
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%d (%p) done, Arg1=%p\n",
+                        arg_count, arg, first_arg));
+
+                /* Move on to next argument, if any */
+
+                arg = arg->common.next;
+                arg_count++;
+        }
+
+        return_ACPI_STATUS (status);
+
+
+cleanup:
+        /*
+         * We must undo everything done above; meaning that we must
+         * pop everything off of the operand stack and delete those
+         * objects
+         */
+        (void) acpi_ds_obj_stack_pop_and_delete (arg_count, walk_state);
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "While creating Arg %d - %s\n",
+                (arg_count + 1), acpi_format_exception (status)));
+        return_ACPI_STATUS (status);
+}
+
+