1 files changed, 204 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/nsparse.c b/drivers/acpi/acpica/nsparse.c
new file mode 100644
index 000000000000..bcfcf427c909
--- /dev/null
+++ b/drivers/acpi/acpica/nsparse.c
@@ -0,0 +1,204 @@
+/******************************************************************************
+ *
+ * Module Name: nsparse - namespace interface to AML parser
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * 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/accommon.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acparser.h>
+#include <acpi/acdispat.h>
+#include <acpi/actables.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,
+                           u32 table_index,
+                           struct acpi_namespace_node *start_node)
+{
+        union acpi_parse_object *parse_root;
+        acpi_status status;
+       u32 aml_length;
+        u8 *aml_start;
+        struct acpi_walk_state *walk_state;
+        struct acpi_table_header *table;
+        acpi_owner_id owner_id;
+
+        ACPI_FUNCTION_TRACE(ns_one_complete_parse);
+
+        status = acpi_tb_get_owner_id(table_index, &owner_id);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /* 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(owner_id, NULL, NULL, NULL);
+        if (!walk_state) {
+                acpi_ps_free_op(parse_root);
+                return_ACPI_STATUS(AE_NO_MEMORY);
+        }
+
+        status = acpi_get_table_by_index(table_index, &table);
+        if (ACPI_FAILURE(status)) {
+                acpi_ds_delete_walk_state(walk_state);
+                acpi_ps_free_op(parse_root);
+                return_ACPI_STATUS(status);
+        }
+
+        /* Table must consist of at least a complete header */
+
+        if (table->length < sizeof(struct acpi_table_header)) {
+                status = AE_BAD_HEADER;
+        } else {
+                aml_start = (u8 *) table + sizeof(struct acpi_table_header);
+                aml_length = table->length - sizeof(struct acpi_table_header);
+                status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL,
+                                               aml_start, aml_length, NULL,
+                                               (u8) pass_number);
+        }
+
+        if (ACPI_FAILURE(status)) {
+                acpi_ds_delete_walk_state(walk_state);
+                goto cleanup;
+        }
+
+        /* start_node is the default location to load the table */
+
+        if (start_node && start_node != acpi_gbl_root_node) {
+                status =
+                    acpi_ds_scope_stack_push(start_node, ACPI_TYPE_METHOD,
+                                             walk_state);
+                if (ACPI_FAILURE(status)) {
+                        acpi_ds_delete_walk_state(walk_state);
+                        goto cleanup;
+                }
+        }
+
+        /* Parse the AML */
+
+        ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "*PARSE* pass %d parse\n",
+                          (unsigned)pass_number));
+        status = acpi_ps_parse_aml(walk_state);
+
+      cleanup:
+        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(u32 table_index, 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.
+         */
+        ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 1\n"));
+        status =
+            acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS1, table_index,
+                                       start_node);
+        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.
+         */
+        ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 2\n"));
+        status =
+            acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS2, table_index,
+                                       start_node);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        return_ACPI_STATUS(status);
+}