1 files changed, 243 insertions, 0 deletions

diff --git a/drivers/acpi/parser/psxface.c b/drivers/acpi/parser/psxface.c
new file mode 100644
index 000000000000..b318ad24726d
--- /dev/null
+++ b/drivers/acpi/parser/psxface.c
@@ -0,0 +1,243 @@
+/******************************************************************************
+ *
+ * Module Name: psxface - Parser external interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acinterp.h>
+#include <acpi/acnamesp.h>
+
+
+#define _COMPONENT          ACPI_PARSER
+         ACPI_MODULE_NAME    ("psxface")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_psx_execute
+ *
+ * PARAMETERS:  Info->Node          - A method object containing both the AML
+ *                                    address and length.
+ *              **Params            - List of parameters to pass to method,
+ *                                    terminated by NULL. Params itself may be
+ *                                    NULL if no parameters are being passed.
+ *              **return_obj_desc   - Return object from execution of the
+ *                                    method.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute a control method
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_psx_execute (
+        struct acpi_parameter_info      *info)
+{
+        acpi_status                     status;
+        union acpi_operand_object       *obj_desc;
+        u32                             i;
+        union acpi_parse_object         *op;
+        struct acpi_walk_state          *walk_state;
+
+
+        ACPI_FUNCTION_TRACE ("psx_execute");
+
+
+        /* Validate the Node and get the attached object */
+
+        if (!info || !info->node) {
+                return_ACPI_STATUS (AE_NULL_ENTRY);
+        }
+
+        obj_desc = acpi_ns_get_attached_object (info->node);
+        if (!obj_desc) {
+                return_ACPI_STATUS (AE_NULL_OBJECT);
+        }
+
+        /* Init for new method, wait on concurrency semaphore */
+
+        status = acpi_ds_begin_method_execution (info->node, obj_desc, NULL);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        if ((info->parameter_type == ACPI_PARAM_ARGS) &&
+                (info->parameters)) {
+                /*
+                 * The caller "owns" the parameters, so give each one an extra
+                 * reference
+                 */
+                for (i = 0; info->parameters[i]; i++) {
+                        acpi_ut_add_reference (info->parameters[i]);
+                }
+        }
+
+        /*
+         * 1) Perform the first pass parse of the method to enter any
+         * named objects that it creates into the namespace
+         */
+        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
+                "**** Begin Method Parse **** Entry=%p obj=%p\n",
+                info->node, obj_desc));
+
+        /* Create and init a Root Node */
+
+        op = acpi_ps_create_scope_op ();
+        if (!op) {
+                status = AE_NO_MEMORY;
+                goto cleanup1;
+        }
+
+        /*
+         * Get a new owner_id for objects created by this method. Namespace
+         * objects (such as Operation Regions) can be created during the
+         * first pass parse.
+         */
+        obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD);
+
+        /* Create and initialize a new walk state */
+
+        walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id,
+                           NULL, NULL, NULL);
+        if (!walk_state) {
+                status = AE_NO_MEMORY;
+                goto cleanup2;
+        }
+
+        status = acpi_ds_init_aml_walk (walk_state, op, info->node,
+                          obj_desc->method.aml_start,
+                          obj_desc->method.aml_length, NULL, 1);
+        if (ACPI_FAILURE (status)) {
+                goto cleanup3;
+        }
+
+        /* Parse the AML */
+
+        status = acpi_ps_parse_aml (walk_state);
+        acpi_ps_delete_parse_tree (op);
+        if (ACPI_FAILURE (status)) {
+                goto cleanup1; /* Walk state is already deleted */
+        }
+
+        /*
+         * 2) Execute the method.  Performs second pass parse simultaneously
+         */
+        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
+                "**** Begin Method Execution **** Entry=%p obj=%p\n",
+                info->node, obj_desc));
+
+        /* Create and init a Root Node */
+
+        op = acpi_ps_create_scope_op ();
+        if (!op) {
+                status = AE_NO_MEMORY;
+                goto cleanup1;
+        }
+
+        /* Init new op with the method name and pointer back to the NS node */
+
+        acpi_ps_set_name (op, info->node->name.integer);
+        op->common.node = info->node;
+
+        /* Create and initialize a new walk state */
+
+        walk_state = acpi_ds_create_walk_state (0, NULL, NULL, NULL);
+        if (!walk_state) {
+                status = AE_NO_MEMORY;
+                goto cleanup2;
+        }
+
+        status = acpi_ds_init_aml_walk (walk_state, op, info->node,
+                          obj_desc->method.aml_start,
+                          obj_desc->method.aml_length, info, 3);
+        if (ACPI_FAILURE (status)) {
+                goto cleanup3;
+        }
+
+        /*
+         * The walk of the parse tree is where we actually execute the method
+         */
+        status = acpi_ps_parse_aml (walk_state);
+        goto cleanup2; /* Walk state already deleted */
+
+
+cleanup3:
+        acpi_ds_delete_walk_state (walk_state);
+
+cleanup2:
+        acpi_ps_delete_parse_tree (op);
+
+cleanup1:
+        if ((info->parameter_type == ACPI_PARAM_ARGS) &&
+                (info->parameters)) {
+                /* Take away the extra reference that we gave the parameters above */
+
+                for (i = 0; info->parameters[i]; i++) {
+                        /* Ignore errors, just do them all */
+
+                        (void) acpi_ut_update_object_reference (info->parameters[i], REF_DECREMENT);
+                }
+        }
+
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        /*
+         * If the method has returned an object, signal this to the caller with
+         * a control exception code
+         */
+        if (info->return_object) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Method returned obj_desc=%p\n",
+                        info->return_object));
+                ACPI_DUMP_STACK_ENTRY (info->return_object);
+
+                status = AE_CTRL_RETURN_VALUE;
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+