patch-2.4.22 linux-2.4.22/drivers/acpi/namespace/nsparse.c

• Lines: 171
• Date: 2003-08-25 04:44:41.000000000 -0700
• Orig file: linux-2.4.21/drivers/acpi/namespace/nsparse.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/drivers/acpi/namespace/nsparse.c linux-2.4.22/drivers/acpi/namespace/nsparse.c
@@ -0,0 +1,170 @@
+/******************************************************************************
+ *
+ * Module Name: nsparse - namespace interface to AML parser
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2003, 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/acnamesp.h>
+#include <acpi/acparser.h>
+#include <acpi/acdispat.h>
+
+
+#define _COMPONENT          ACPI_NAMESPACE
+	 ACPI_MODULE_NAME    ("nsparse")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    ns_one_complete_parse
+ *
+ * PARAMETERS:  pass_number             - 1 or 2
+ *              table_desc              - The table to be parsed.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Perform one complete parse of an ACPI/AML table.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_one_complete_parse (
+	u32                             pass_number,
+	struct acpi_table_desc          *table_desc)
+{
+	union acpi_parse_object         *parse_root;
+	acpi_status                     status;
+	struct acpi_walk_state          *walk_state;
+
+
+	ACPI_FUNCTION_TRACE ("ns_one_complete_parse");
+
+
+	/* Create and init a Root Node */
+
+	parse_root = acpi_ps_create_scope_op ();
+	if (!parse_root) {
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	/* Create and initialize a new walk state */
+
+	walk_state = acpi_ds_create_walk_state (table_desc->table_id,
+			   NULL, NULL, NULL);
+	if (!walk_state) {
+		acpi_ps_free_op (parse_root);
+		return_ACPI_STATUS (AE_NO_MEMORY);
+	}
+
+	status = acpi_ds_init_aml_walk (walk_state, parse_root, NULL, table_desc->aml_start,
+			  table_desc->aml_length, NULL, NULL, pass_number);
+	if (ACPI_FAILURE (status)) {
+		acpi_ds_delete_walk_state (walk_state);
+		return_ACPI_STATUS (status);
+	}
+
+	/* Parse the AML */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "*PARSE* pass %d parse\n", pass_number));
+	status = acpi_ps_parse_aml (walk_state);
+
+	acpi_ps_delete_parse_tree (parse_root);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_parse_table
+ *
+ * PARAMETERS:  table_desc      - An ACPI table descriptor for table to parse
+ *              start_node      - Where to enter the table into the namespace
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_parse_table (
+	struct acpi_table_desc          *table_desc,
+	struct acpi_namespace_node      *start_node)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ns_parse_table");
+
+
+	/*
+	 * AML Parse, pass 1
+	 *
+	 * In this pass, we load most of the namespace.  Control methods
+	 * are not parsed until later.  A parse tree is not created.  Instead,
+	 * each Parser Op subtree is deleted when it is finished.  This saves
+	 * a great deal of memory, and allows a small cache of parse objects
+	 * to service the entire parse.  The second pass of the parse then
+	 * performs another complete parse of the AML..
+	 */
+	status = acpi_ns_one_complete_parse (1, table_desc);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/*
+	 * AML Parse, pass 2
+	 *
+	 * In this pass, we resolve forward references and other things
+	 * that could not be completed during the first pass.
+	 * Another complete parse of the AML is performed, but the
+	 * overhead of this is compensated for by the fact that the
+	 * parse objects are all cached.
+	 */
+	status = acpi_ns_one_complete_parse (2, table_desc);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	return_ACPI_STATUS (status);
+}
+
+