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, 1266 insertions, 0 deletions

diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
new file mode 100644
index 000000000000..e79edb53cb3b
--- /dev/null
+++ b/drivers/acpi/parser/psparse.c
@@ -0,0 +1,1266 @@
+/******************************************************************************
+ *
+ * Module Name: psparse - Parser top level AML parse 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.
+ */
+
+
+/*
+ * Parse the AML and build an operation tree as most interpreters,
+ * like Perl, do.  Parsing is done by hand rather than with a YACC
+ * generated parser to tightly constrain stack and dynamic memory
+ * usage.  At the same time, parsing is kept flexible and the code
+ * fairly compact by parsing based on a list of AML opcode
+ * templates in aml_op_info[]
+ */
+
+#include <acpi/acpi.h>
+#include <acpi/acparser.h>
+#include <acpi/acdispat.h>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
+
+#define _COMPONENT          ACPI_PARSER
+	 ACPI_MODULE_NAME    ("psparse")
+
+
+static u32                          acpi_gbl_depth = 0;
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_get_opcode_size
+ *
+ * PARAMETERS:  Opcode          - An AML opcode
+ *
+ * RETURN:      Size of the opcode, in bytes (1 or 2)
+ *
+ * DESCRIPTION: Get the size of the current opcode.
+ *
+ ******************************************************************************/
+
+u32
+acpi_ps_get_opcode_size (
+	u32                             opcode)
+{
+
+	/* Extended (2-byte) opcode if > 255 */
+
+	if (opcode > 0x00FF) {
+		return (2);
+	}
+
+	/* Otherwise, just a single byte opcode */
+
+	return (1);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_peek_opcode
+ *
+ * PARAMETERS:  parser_state        - A parser state object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get next AML opcode (without incrementing AML pointer)
+ *
+ ******************************************************************************/
+
+u16
+acpi_ps_peek_opcode (
+	struct acpi_parse_state         *parser_state)
+{
+	u8                              *aml;
+	u16                             opcode;
+
+
+	aml = parser_state->aml;
+	opcode = (u16) ACPI_GET8 (aml);
+
+
+	if (opcode == AML_EXTOP) {
+		/* Extended opcode */
+
+		aml++;
+		opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml));
+	}
+
+	return (opcode);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_complete_this_op
+ *
+ * PARAMETERS:  walk_state      - Current State
+ *              Op              - Op to complete
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Perform any cleanup at the completion of an Op.
+ *
+ ******************************************************************************/
+
+void
+acpi_ps_complete_this_op (
+	struct acpi_walk_state          *walk_state,
+	union acpi_parse_object         *op)
+{
+	union acpi_parse_object         *prev;
+	union acpi_parse_object         *next;
+	const struct acpi_opcode_info   *parent_info;
+	union acpi_parse_object         *replacement_op = NULL;
+
+
+	ACPI_FUNCTION_TRACE_PTR ("ps_complete_this_op", op);
+
+
+	/* Check for null Op, can happen if AML code is corrupt */
+
+	if (!op) {
+		return_VOID;
+	}
+
+	/* Delete this op and the subtree below it if asked to */
+
+	if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) != ACPI_PARSE_DELETE_TREE) ||
+		 (walk_state->op_info->class == AML_CLASS_ARGUMENT)) {
+		return_VOID;
+	}
+
+	/* Make sure that we only delete this subtree */
+
+	if (op->common.parent) {
+		/*
+		 * Check if we need to replace the operator and its subtree
+		 * with a return value op (placeholder op)
+		 */
+		parent_info = acpi_ps_get_opcode_info (op->common.parent->common.aml_opcode);
+
+		switch (parent_info->class) {
+		case AML_CLASS_CONTROL:
+			break;
+
+		case AML_CLASS_CREATE:
+
+			/*
+			 * These opcodes contain term_arg operands. The current
+			 * op must be replaced by a placeholder return op
+			 */
+			replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
+			if (!replacement_op) {
+				goto cleanup;
+			}
+			break;
+
+		case AML_CLASS_NAMED_OBJECT:
+
+			/*
+			 * These opcodes contain term_arg operands. The current
+			 * op must be replaced by a placeholder return op
+			 */
+			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_BUFFER_OP)      ||
+				(op->common.parent->common.aml_opcode == AML_PACKAGE_OP)     ||
+				(op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
+				replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
+				if (!replacement_op) {
+					goto cleanup;
+				}
+			}
+
+			if ((op->common.parent->common.aml_opcode == AML_NAME_OP) &&
+				(walk_state->descending_callback != acpi_ds_exec_begin_op)) {
+				if ((op->common.aml_opcode == AML_BUFFER_OP) ||
+					(op->common.aml_opcode == AML_PACKAGE_OP) ||
+					(op->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
+					replacement_op = acpi_ps_alloc_op (op->common.aml_opcode);
+					if (!replacement_op) {
+						goto cleanup;
+					}
+
+					replacement_op->named.data = op->named.data;
+					replacement_op->named.length = op->named.length;
+				}
+			}
+			break;
+
+		default:
+			replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
+			if (!replacement_op) {
+				goto cleanup;
+			}
+		}
+
+		/* We must unlink this op from the parent tree */
+
+		prev = op->common.parent->common.value.arg;
+		if (prev == op) {
+			/* This op is the first in the list */
+
+			if (replacement_op) {
+				replacement_op->common.parent       = op->common.parent;
+				replacement_op->common.value.arg    = NULL;
+				replacement_op->common.node         = op->common.node;
+				op->common.parent->common.value.arg = replacement_op;
+				replacement_op->common.next         = op->common.next;
+			}
+			else {
+				op->common.parent->common.value.arg = op->common.next;
+			}
+		}
+
+		/* Search the parent list */
+
+		else while (prev) {
+			/* Traverse all siblings in the parent's argument list */
+
+			next = prev->common.next;
+			if (next == op) {
+				if (replacement_op) {
+					replacement_op->common.parent   = op->common.parent;
+					replacement_op->common.value.arg = NULL;
+					replacement_op->common.node     = op->common.node;
+					prev->common.next               = replacement_op;
+					replacement_op->common.next     = op->common.next;
+					next = NULL;
+				}
+				else {
+					prev->common.next = op->common.next;
+					next = NULL;
+				}
+			}
+
+			prev = next;
+		}
+	}
+
+
+cleanup:
+
+	/* Now we can actually delete the subtree rooted at op */
+
+	acpi_ps_delete_parse_tree (op);
+	return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_next_parse_state
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Update the parser state based upon the return exception from
+ *              the parser callback.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_next_parse_state (
+	struct acpi_walk_state          *walk_state,
+	union acpi_parse_object         *op,
+	acpi_status                     callback_status)
+{
+	struct acpi_parse_state         *parser_state = &walk_state->parser_state;
+	acpi_status                     status = AE_CTRL_PENDING;
+
+
+	ACPI_FUNCTION_TRACE_PTR ("ps_next_parse_state", op);
+
+
+	switch (callback_status) {
+	case AE_CTRL_TERMINATE:
+
+		/*
+		 * A control method was terminated via a RETURN statement.
+		 * The walk of this method is complete.
+		 */
+		parser_state->aml = parser_state->aml_end;
+		status = AE_CTRL_TERMINATE;
+		break;
+
+
+	case AE_CTRL_BREAK:
+
+		parser_state->aml = walk_state->aml_last_while;
+		walk_state->control_state->common.value = FALSE;
+		status = AE_CTRL_BREAK;
+		break;
+
+	case AE_CTRL_CONTINUE:
+
+
+		parser_state->aml = walk_state->aml_last_while;
+		status = AE_CTRL_CONTINUE;
+		break;
+
+	case AE_CTRL_PENDING:
+
+		parser_state->aml = walk_state->aml_last_while;
+		break;
+
+#if 0
+	case AE_CTRL_SKIP:
+
+		parser_state->aml = parser_state->scope->parse_scope.pkg_end;
+		status = AE_OK;
+		break;
+#endif
+
+	case AE_CTRL_TRUE:
+
+		/*
+		 * Predicate of an IF was true, and we are at the matching ELSE.
+		 * Just close out this package
+		 */
+		parser_state->aml = acpi_ps_get_next_package_end (parser_state);
+		break;
+
+
+	case AE_CTRL_FALSE:
+
+		/*
+		 * Either an IF/WHILE Predicate was false or we encountered a BREAK
+		 * opcode.  In both cases, we do not execute the rest of the
+		 * package;  We simply close out the parent (finishing the walk of
+		 * this branch of the tree) and continue execution at the parent
+		 * level.
+		 */
+		parser_state->aml = parser_state->scope->parse_scope.pkg_end;
+
+		/* In the case of a BREAK, just force a predicate (if any) to FALSE */
+
+		walk_state->control_state->common.value = FALSE;
+		status = AE_CTRL_END;
+		break;
+
+
+	case AE_CTRL_TRANSFER:
+
+		/*
+		 * A method call (invocation) -- transfer control
+		 */
+		status = AE_CTRL_TRANSFER;
+		walk_state->prev_op = op;
+		walk_state->method_call_op = op;
+		walk_state->method_call_node = (op->common.value.arg)->common.node;
+
+		/* Will return value (if any) be used by the caller? */
+
+		walk_state->return_used = acpi_ds_is_result_used (op, walk_state);
+		break;
+
+
+	default:
+		status = callback_status;
+		if ((callback_status & AE_CODE_MASK) == AE_CODE_CONTROL) {
+			status = AE_OK;
+		}
+		break;
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_parse_loop
+ *
+ * PARAMETERS:  parser_state        - Current parser state object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Parse AML (pointed to by the current parser state) and return
+ *              a tree of ops.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_parse_loop (
+	struct acpi_walk_state          *walk_state)
+{
+	acpi_status                     status = AE_OK;
+	union acpi_parse_object         *op = NULL;     /* current op */
+	union acpi_parse_object         *arg = NULL;
+	union acpi_parse_object         *pre_op = NULL;
+	struct acpi_parse_state         *parser_state;
+	u8                              *aml_op_start = NULL;
+
+
+	ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state);
+
+	if (walk_state->descending_callback == NULL) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	parser_state = &walk_state->parser_state;
+	walk_state->arg_types = 0;
+
+#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
+	if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) {
+		/* We are restarting a preempted control method */
+
+		if (acpi_ps_has_completed_scope (parser_state)) {
+			/*
+			 * We must check if a predicate to an IF or WHILE statement
+			 * was just completed
+			 */
+			if ((parser_state->scope->parse_scope.op) &&
+			   ((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) ||
+				(parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) &&
+				(walk_state->control_state) &&
+				(walk_state->control_state->common.state ==
+					ACPI_CONTROL_PREDICATE_EXECUTING)) {
+				/*
+				 * A predicate was just completed, get the value of the
+				 * predicate and branch based on that value
+				 */
+				walk_state->op = NULL;
+				status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE));
+				if (ACPI_FAILURE (status) &&
+					((status & AE_CODE_MASK) != AE_CODE_CONTROL)) {
+					if (status == AE_AML_NO_RETURN_VALUE) {
+						ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+							"Invoked method did not return a value, %s\n",
+							acpi_format_exception (status)));
+
+					}
+					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "get_predicate Failed, %s\n",
+						acpi_format_exception (status)));
+					return_ACPI_STATUS (status);
+				}
+
+				status = acpi_ps_next_parse_state (walk_state, op, status);
+			}
+
+			acpi_ps_pop_scope (parser_state, &op,
+				&walk_state->arg_types, &walk_state->arg_count);
+			ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
+		}
+		else if (walk_state->prev_op) {
+			/* We were in the middle of an op */
+
+			op = walk_state->prev_op;
+			walk_state->arg_types = walk_state->prev_arg_types;
+		}
+	}
+#endif
+
+	/*
+	 * Iterative parsing loop, while there is more aml to process:
+	 */
+	while ((parser_state->aml < parser_state->aml_end) || (op)) {
+		aml_op_start = parser_state->aml;
+		if (!op) {
+			/* Get the next opcode from the AML stream */
+
+			walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
+					   parser_state->aml_start);
+			walk_state->opcode   = acpi_ps_peek_opcode (parser_state);
+
+			/*
+			 * First cut to determine what we have found:
+			 * 1) A valid AML opcode
+			 * 2) A name string
+			 * 3) An unknown/invalid opcode
+			 */
+			walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
+			switch (walk_state->op_info->class) {
+			case AML_CLASS_ASCII:
+			case AML_CLASS_PREFIX:
+				/*
+				 * Starts with a valid prefix or ASCII char, this is a name
+				 * string.  Convert the bare name string to a namepath.
+				 */
+				walk_state->opcode = AML_INT_NAMEPATH_OP;
+				walk_state->arg_types = ARGP_NAMESTRING;
+				break;
+
+			case AML_CLASS_UNKNOWN:
+
+				/* The opcode is unrecognized.  Just skip unknown opcodes */
+
+				ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+					"Found unknown opcode %X at AML address %p offset %X, ignoring\n",
+					walk_state->opcode, parser_state->aml, walk_state->aml_offset));
+
+				ACPI_DUMP_BUFFER (parser_state->aml, 128);
+
+				/* Assume one-byte bad opcode */
+
+				parser_state->aml++;
+				continue;
+
+			default:
+
+				/* Found opcode info, this is a normal opcode */
+
+				parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode);
+				walk_state->arg_types = walk_state->op_info->parse_args;
+				break;
+			}
+
+			/* Create Op structure and append to parent's argument list */
+
+			if (walk_state->op_info->flags & AML_NAMED) {
+				/* Allocate a new pre_op if necessary */
+
+				if (!pre_op) {
+					pre_op = acpi_ps_alloc_op (walk_state->opcode);
+					if (!pre_op) {
+						status = AE_NO_MEMORY;
+						goto close_this_op;
+					}
+				}
+
+				pre_op->common.value.arg = NULL;
+				pre_op->common.aml_opcode = walk_state->opcode;
+
+				/*
+				 * Get and append arguments until we find the node that contains
+				 * the name (the type ARGP_NAME).
+				 */
+				while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
+					  (GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) {
+					status = acpi_ps_get_next_arg (walk_state, parser_state,
+							 GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
+					if (ACPI_FAILURE (status)) {
+						goto close_this_op;
+					}
+
+					acpi_ps_append_arg (pre_op, arg);
+					INCREMENT_ARG_LIST (walk_state->arg_types);
+				}
+
+				/* Make sure that we found a NAME and didn't run out of arguments */
+
+				if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) {
+					status = AE_AML_NO_OPERAND;
+					goto close_this_op;
+				}
+
+				/* We know that this arg is a name, move to next arg */
+
+				INCREMENT_ARG_LIST (walk_state->arg_types);
+
+				/*
+				 * Find the object.  This will either insert the object into
+				 * the namespace or simply look it up
+				 */
+				walk_state->op = NULL;
+
+				status = walk_state->descending_callback (walk_state, &op);
+				if (ACPI_FAILURE (status)) {
+					ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "During name lookup/catalog, %s\n",
+							acpi_format_exception (status)));
+					goto close_this_op;
+				}
+
+				if (op == NULL) {
+					continue;
+				}
+
+				status = acpi_ps_next_parse_state (walk_state, op, status);
+				if (status == AE_CTRL_PENDING) {
+					status = AE_OK;
+					goto close_this_op;
+				}
+
+				if (ACPI_FAILURE (status)) {
+					goto close_this_op;
+				}
+
+				acpi_ps_append_arg (op, pre_op->common.value.arg);
+				acpi_gbl_depth++;
+
+				if (op->common.aml_opcode == AML_REGION_OP) {
+					/*
+					 * Defer final parsing of an operation_region body,
+					 * because we don't have enough info in the first pass
+					 * to parse it correctly (i.e., there may be method
+					 * calls within the term_arg elements of the body.)
+					 *
+					 * However, we must continue parsing because
+					 * the opregion is not a standalone package --
+					 * we don't know where the end is at this point.
+					 *
+					 * (Length is unknown until parse of the body complete)
+					 */
+					op->named.data    = aml_op_start;
+					op->named.length  = 0;
+				}
+			}
+			else {
+				/* Not a named opcode, just allocate Op and append to parent */
+
+				walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
+				op = acpi_ps_alloc_op (walk_state->opcode);
+				if (!op) {
+					status = AE_NO_MEMORY;
+					goto close_this_op;
+				}
+
+				if (walk_state->op_info->flags & AML_CREATE) {
+					/*
+					 * Backup to beginning of create_xXXfield declaration
+					 * body_length is unknown until we parse the body
+					 */
+					op->named.data    = aml_op_start;
+					op->named.length  = 0;
+				}
+
+				acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op);
+
+				if ((walk_state->descending_callback != NULL)) {
+					/*
+					 * Find the object.  This will either insert the object into
+					 * the namespace or simply look it up
+					 */
+					walk_state->op = op;
+
+					status = walk_state->descending_callback (walk_state, &op);
+					status = acpi_ps_next_parse_state (walk_state, op, status);
+					if (status == AE_CTRL_PENDING) {
+						status = AE_OK;
+						goto close_this_op;
+					}
+
+					if (ACPI_FAILURE (status)) {
+						goto close_this_op;
+					}
+				}
+			}
+
+			op->common.aml_offset = walk_state->aml_offset;
+
+			if (walk_state->op_info) {
+				ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
+					"Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n",
+					 (u32) op->common.aml_opcode, walk_state->op_info->name,
+					 op, parser_state->aml, op->common.aml_offset));
+			}
+		}
+
+
+		/* Start arg_count at zero because we don't know if there are any args yet */
+
+		walk_state->arg_count = 0;
+
+		if (walk_state->arg_types) /* Are there any arguments that must be processed? */ {
+			/* Get arguments */
+
+			switch (op->common.aml_opcode) {
+			case AML_BYTE_OP:       /* AML_BYTEDATA_ARG */
+			case AML_WORD_OP:       /* AML_WORDDATA_ARG */
+			case AML_DWORD_OP:      /* AML_DWORDATA_ARG */
+			case AML_QWORD_OP:      /* AML_QWORDATA_ARG */
+			case AML_STRING_OP:     /* AML_ASCIICHARLIST_ARG */
+
+				/* Fill in constant or string argument directly */
+
+				acpi_ps_get_next_simple_arg (parser_state,
+					GET_CURRENT_ARG_TYPE (walk_state->arg_types), op);
+				break;
+
+			case AML_INT_NAMEPATH_OP:   /* AML_NAMESTRING_ARG */
+
+				status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1);
+				if (ACPI_FAILURE (status)) {
+					goto close_this_op;
+				}
+
+				walk_state->arg_types = 0;
+				break;
+
+			default:
+
+				/* Op is not a constant or string, append each argument to the Op */
+
+				while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
+						!walk_state->arg_count) {
+					walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
+							   parser_state->aml_start);
+					status = acpi_ps_get_next_arg (walk_state, parser_state,
+							 GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
+					if (ACPI_FAILURE (status)) {
+						goto close_this_op;
+					}
+
+					if (arg) {
+						arg->common.aml_offset = walk_state->aml_offset;
+						acpi_ps_append_arg (op, arg);
+					}
+					INCREMENT_ARG_LIST (walk_state->arg_types);
+				}
+
+				/* Special processing for certain opcodes */
+
+				switch (op->common.aml_opcode) {
+				case AML_METHOD_OP:
+
+					/*
+					 * Skip parsing of control method
+					 * because we don't have enough info in the first pass
+					 * to parse it correctly.
+					 *
+					 * Save the length and address of the body
+					 */
+					op->named.data   = parser_state->aml;
+					op->named.length = (u32) (parser_state->pkg_end - parser_state->aml);
+
+					/* Skip body of method */
+
+					parser_state->aml   = parser_state->pkg_end;
+					walk_state->arg_count = 0;
+					break;
+
+				case AML_BUFFER_OP:
+				case AML_PACKAGE_OP:
+				case AML_VAR_PACKAGE_OP:
+
+					if ((op->common.parent) &&
+						(op->common.parent->common.aml_opcode == AML_NAME_OP) &&
+						(walk_state->descending_callback != acpi_ds_exec_begin_op)) {
+						/*
+						 * Skip parsing of Buffers and Packages
+						 * because we don't have enough info in the first pass
+						 * to parse them correctly.
+						 */
+						op->named.data   = aml_op_start;
+						op->named.length = (u32) (parser_state->pkg_end - aml_op_start);
+
+						/* Skip body */
+
+						parser_state->aml   = parser_state->pkg_end;
+						walk_state->arg_count = 0;
+					}
+					break;
+
+				case AML_WHILE_OP:
+
+					if (walk_state->control_state) {
+						walk_state->control_state->control.package_end = parser_state->pkg_end;
+					}
+					break;
+
+				default:
+
+					/* No action for all other opcodes */
+					break;
+				}
+				break;
+			}
+		}
+
+		/* Check for arguments that need to be processed */
+
+		if (walk_state->arg_count) {
+			/* There are arguments (complex ones), push Op and prepare for argument */
+
+			status = acpi_ps_push_scope (parser_state, op,
+					 walk_state->arg_types, walk_state->arg_count);
+			if (ACPI_FAILURE (status)) {
+				goto close_this_op;
+			}
+			op = NULL;
+			continue;
+		}
+
+		/* All arguments have been processed -- Op is complete, prepare for next */
+
+		walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
+		if (walk_state->op_info->flags & AML_NAMED) {
+			if (acpi_gbl_depth) {
+				acpi_gbl_depth--;
+			}
+
+			if (op->common.aml_opcode == AML_REGION_OP) {
+				/*
+				 * Skip parsing of control method or opregion body,
+				 * because we don't have enough info in the first pass
+				 * to parse them correctly.
+				 *
+				 * Completed parsing an op_region declaration, we now
+				 * know the length.
+				 */
+				op->named.length = (u32) (parser_state->aml - op->named.data);
+			}
+		}
+
+		if (walk_state->op_info->flags & AML_CREATE) {
+			/*
+			 * Backup to beginning of create_xXXfield declaration (1 for
+			 * Opcode)
+			 *
+			 * body_length is unknown until we parse the body
+			 */
+			op->named.length = (u32) (parser_state->aml - op->named.data);
+		}
+
+		/* This op complete, notify the dispatcher */
+
+		if (walk_state->ascending_callback != NULL) {
+			walk_state->op    = op;
+			walk_state->opcode = op->common.aml_opcode;
+
+			status = walk_state->ascending_callback (walk_state);
+			status = acpi_ps_next_parse_state (walk_state, op, status);
+			if (status == AE_CTRL_PENDING) {
+				status = AE_OK;
+				goto close_this_op;
+			}
+		}
+
+
+close_this_op:
+		/*
+		 * Finished one argument of the containing scope
+		 */
+		parser_state->scope->parse_scope.arg_count--;
+
+		/* Close this Op (will result in parse subtree deletion) */
+
+		acpi_ps_complete_this_op (walk_state, op);
+		op = NULL;
+		if (pre_op) {
+			acpi_ps_free_op (pre_op);
+			pre_op = NULL;
+		}
+
+		switch (status) {
+		case AE_OK:
+			break;
+
+
+		case AE_CTRL_TRANSFER:
+
+			/*
+			 * We are about to transfer to a called method.
+			 */
+			walk_state->prev_op = op;
+			walk_state->prev_arg_types = walk_state->arg_types;
+			return_ACPI_STATUS (status);
+
+
+		case AE_CTRL_END:
+
+			acpi_ps_pop_scope (parser_state, &op,
+				&walk_state->arg_types, &walk_state->arg_count);
+
+			if (op) {
+				walk_state->op    = op;
+				walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
+				walk_state->opcode = op->common.aml_opcode;
+
+				status = walk_state->ascending_callback (walk_state);
+				status = acpi_ps_next_parse_state (walk_state, op, status);
+
+				acpi_ps_complete_this_op (walk_state, op);
+				op = NULL;
+			}
+			status = AE_OK;
+			break;
+
+
+		case AE_CTRL_BREAK:
+		case AE_CTRL_CONTINUE:
+
+			/* Pop off scopes until we find the While */
+
+			while (!op || (op->common.aml_opcode != AML_WHILE_OP)) {
+				acpi_ps_pop_scope (parser_state, &op,
+					&walk_state->arg_types, &walk_state->arg_count);
+			}
+
+			/* Close this iteration of the While loop */
+
+			walk_state->op    = op;
+			walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
+			walk_state->opcode = op->common.aml_opcode;
+
+			status = walk_state->ascending_callback (walk_state);
+			status = acpi_ps_next_parse_state (walk_state, op, status);
+
+			acpi_ps_complete_this_op (walk_state, op);
+			op = NULL;
+
+			status = AE_OK;
+			break;
+
+
+		case AE_CTRL_TERMINATE:
+
+			status = AE_OK;
+
+			/* Clean up */
+			do {
+				if (op) {
+					acpi_ps_complete_this_op (walk_state, op);
+				}
+				acpi_ps_pop_scope (parser_state, &op,
+					&walk_state->arg_types, &walk_state->arg_count);
+
+			} while (op);
+
+			return_ACPI_STATUS (status);
+
+
+		default:  /* All other non-AE_OK status */
+
+			do {
+				if (op) {
+					acpi_ps_complete_this_op (walk_state, op);
+				}
+				acpi_ps_pop_scope (parser_state, &op,
+					&walk_state->arg_types, &walk_state->arg_count);
+
+			} while (op);
+
+
+			/*
+			 * TBD: Cleanup parse ops on error
+			 */
+#if 0
+			if (op == NULL) {
+				acpi_ps_pop_scope (parser_state, &op,
+					&walk_state->arg_types, &walk_state->arg_count);
+			}
+#endif
+			walk_state->prev_op = op;
+			walk_state->prev_arg_types = walk_state->arg_types;
+			return_ACPI_STATUS (status);
+		}
+
+		/* This scope complete? */
+
+		if (acpi_ps_has_completed_scope (parser_state)) {
+			acpi_ps_pop_scope (parser_state, &op,
+				&walk_state->arg_types, &walk_state->arg_count);
+			ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
+		}
+		else {
+			op = NULL;
+		}
+
+	} /* while parser_state->Aml */
+
+
+	/*
+	 * Complete the last Op (if not completed), and clear the scope stack.
+	 * It is easily possible to end an AML "package" with an unbounded number
+	 * of open scopes (such as when several ASL blocks are closed with
+	 * sequential closing braces).  We want to terminate each one cleanly.
+	 */
+	ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op));
+	do {
+		if (op) {
+			if (walk_state->ascending_callback != NULL) {
+				walk_state->op    = op;
+				walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
+				walk_state->opcode = op->common.aml_opcode;
+
+				status = walk_state->ascending_callback (walk_state);
+				status = acpi_ps_next_parse_state (walk_state, op, status);
+				if (status == AE_CTRL_PENDING) {
+					status = AE_OK;
+					goto close_this_op;
+				}
+
+				if (status == AE_CTRL_TERMINATE) {
+					status = AE_OK;
+
+					/* Clean up */
+					do {
+						if (op) {
+							acpi_ps_complete_this_op (walk_state, op);
+						}
+
+						acpi_ps_pop_scope (parser_state, &op,
+							&walk_state->arg_types, &walk_state->arg_count);
+
+					} while (op);
+
+					return_ACPI_STATUS (status);
+				}
+
+				else if (ACPI_FAILURE (status)) {
+					acpi_ps_complete_this_op (walk_state, op);
+					return_ACPI_STATUS (status);
+				}
+			}
+
+			acpi_ps_complete_this_op (walk_state, op);
+		}
+
+		acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types,
+			&walk_state->arg_count);
+
+	} while (op);
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_parse_aml
+ *
+ * PARAMETERS:  start_scope     - The starting point of the parse.  Becomes the
+ *                                root of the parsed op tree.
+ *              Aml             - Pointer to the raw AML code to parse
+ *              aml_size        - Length of the AML to parse
+ *
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Parse raw AML and return a tree of ops
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ps_parse_aml (
+	struct acpi_walk_state          *walk_state)
+{
+	acpi_status                     status;
+	acpi_status                     terminate_status;
+	struct acpi_thread_state        *thread;
+	struct acpi_thread_state        *prev_walk_list = acpi_gbl_current_walk_list;
+	struct acpi_walk_state          *previous_walk_state;
+
+
+	ACPI_FUNCTION_TRACE ("ps_parse_aml");
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Entered with walk_state=%p Aml=%p size=%X\n",
+		walk_state, walk_state->parser_state.aml, walk_state->parser_state.aml_size));
+
+
+	/* Create and initialize a new thread state */
+
+	thread = acpi_ut_create_thread_state ();
+	if (!thread) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	walk_state->thread = thread;
+	acpi_ds_push_walk_state (walk_state, thread);
+
+	/*
+	 * This global allows the AML debugger to get a handle to the currently
+	 * executing control method.
+	 */
+	acpi_gbl_current_walk_list = thread;
+
+	/*
+	 * Execute the walk loop as long as there is a valid Walk State.  This
+	 * handles nested control method invocations without recursion.
+	 */
+	ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "State=%p\n", walk_state));
+
+	status = AE_OK;
+	while (walk_state) {
+		if (ACPI_SUCCESS (status)) {
+			/*
+			 * The parse_loop executes AML until the method terminates
+			 * or calls another method.
+			 */
+			status = acpi_ps_parse_loop (walk_state);
+		}
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
+			"Completed one call to walk loop, %s State=%p\n",
+			acpi_format_exception (status), walk_state));
+
+		if (status == AE_CTRL_TRANSFER) {
+			/*
+			 * A method call was detected.
+			 * Transfer control to the called control method
+			 */
+			status = acpi_ds_call_control_method (thread, walk_state, NULL);
+
+			/*
+			 * If the transfer to the new method method call worked, a new walk
+			 * state was created -- get it
+			 */
+			walk_state = acpi_ds_get_current_walk_state (thread);
+			continue;
+		}
+		else if (status == AE_CTRL_TERMINATE) {
+			status = AE_OK;
+		}
+		else if ((status != AE_OK) && (walk_state->method_desc)) {
+			ACPI_REPORT_METHOD_ERROR ("Method execution failed",
+				walk_state->method_node, NULL, status);
+
+			/* Check for possible multi-thread reentrancy problem */
+
+			if ((status == AE_ALREADY_EXISTS) &&
+				(!walk_state->method_desc->method.semaphore)) {
+				/*
+				 * This method is marked not_serialized, but it tried to create a named
+				 * object, causing the second thread entrance to fail.  We will workaround
+				 * this by marking the method permanently as Serialized.
+				 */
+				walk_state->method_desc->method.method_flags |= AML_METHOD_SERIALIZED;
+				walk_state->method_desc->method.concurrency = 1;
+			}
+		}
+
+		if (walk_state->method_desc) {
+			/* Decrement the thread count on the method parse tree */
+
+			if (walk_state->method_desc->method.thread_count) {
+				walk_state->method_desc->method.thread_count--;
+			}
+		}
+
+		/* We are done with this walk, move on to the parent if any */
+
+		walk_state = acpi_ds_pop_walk_state (thread);
+
+		/* Reset the current scope to the beginning of scope stack */
+
+		acpi_ds_scope_stack_clear (walk_state);
+
+		/*
+		 * If we just returned from the execution of a control method,
+		 * there's lots of cleanup to do
+		 */
+		if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) {
+			terminate_status = acpi_ds_terminate_control_method (walk_state);
+			if (ACPI_FAILURE (terminate_status)) {
+				ACPI_REPORT_ERROR ((
+					"Could not terminate control method properly\n"));
+
+				/* Ignore error and continue */
+			}
+		}
+
+		/* Delete this walk state and all linked control states */
+
+		acpi_ps_cleanup_scope (&walk_state->parser_state);
+
+		previous_walk_state = walk_state;
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "return_value=%p, implicit_value=%p State=%p\n",
+			walk_state->return_desc, walk_state->implicit_return_obj, walk_state));
+
+		/* Check if we have restarted a preempted walk */
+
+		walk_state = acpi_ds_get_current_walk_state (thread);
+		if (walk_state) {
+			if (ACPI_SUCCESS (status)) {
+				/*
+				 * There is another walk state, restart it.
+				 * If the method return value is not used by the parent,
+				 * The object is deleted
+				 */
+				if (!previous_walk_state->return_desc) {
+					status = acpi_ds_restart_control_method (walk_state,
+							 previous_walk_state->implicit_return_obj);
+				}
+				else {
+					/*
+					 * We have a valid return value, delete any implicit
+					 * return value.
+					 */
+					acpi_ds_clear_implicit_return (previous_walk_state);
+
+					status = acpi_ds_restart_control_method (walk_state,
+							 previous_walk_state->return_desc);
+				}
+				if (ACPI_SUCCESS (status)) {
+					walk_state->walk_type |= ACPI_WALK_METHOD_RESTART;
+				}
+			}
+			else {
+				/* On error, delete any return object */
+
+				acpi_ut_remove_reference (previous_walk_state->return_desc);
+			}
+		}
+
+		/*
+		 * Just completed a 1st-level method, save the final internal return
+		 * value (if any)
+		 */
+		else if (previous_walk_state->caller_return_desc) {
+			if (previous_walk_state->implicit_return_obj) {
+				*(previous_walk_state->caller_return_desc) = previous_walk_state->implicit_return_obj;
+			}
+			else {
+				 /* NULL if no return value */
+
+				*(previous_walk_state->caller_return_desc) = previous_walk_state->return_desc;
+			}
+		}
+		else {
+			if (previous_walk_state->return_desc) {
+				/* Caller doesn't want it, must delete it */
+
+				acpi_ut_remove_reference (previous_walk_state->return_desc);
+			}
+			if (previous_walk_state->implicit_return_obj) {
+				/* Caller doesn't want it, must delete it */
+
+				acpi_ut_remove_reference (previous_walk_state->implicit_return_obj);
+			}
+		}
+
+		acpi_ds_delete_walk_state (previous_walk_state);
+	}
+
+	/* Normal exit */
+
+	acpi_ex_release_all_mutexes (thread);
+	acpi_ut_delete_generic_state (ACPI_CAST_PTR (union acpi_generic_state, thread));
+	acpi_gbl_current_walk_list = prev_walk_list;
+	return_ACPI_STATUS (status);
+}
+
+