1 files changed, 385 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
new file mode 100644
index 00000000000..ff06032c0f0
--- /dev/null
+++ b/drivers/acpi/acpica/psxface.c
@@ -0,0 +1,385 @@
+/******************************************************************************
+ *
+ * Module Name: psxface - Parser external interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * 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 "accommon.h"
+#include "acparser.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "amlcode.h"
+
+#define _COMPONENT          ACPI_PARSER
+ACPI_MODULE_NAME("psxface")
+
+/* Local Prototypes */
+static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
+
+static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
+
+static void
+acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_debug_trace
+ *
+ * PARAMETERS:  method_name     - Valid ACPI name string
+ *              debug_level     - Optional level mask. 0 to use default
+ *              debug_layer     - Optional layer mask. 0 to use default
+ *              Flags           - bit 1: one shot(1) or persistent(0)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: External interface to enable debug tracing during control
+ *              method execution
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
+{
+        acpi_status status;
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE(status)) {
+                return (status);
+        }
+
+        /* TBDs: Validate name, allow full path or just nameseg */
+
+        acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
+        acpi_gbl_trace_flags = flags;
+
+        if (debug_level) {
+                acpi_gbl_trace_dbg_level = debug_level;
+        }
+        if (debug_layer) {
+                acpi_gbl_trace_dbg_layer = debug_layer;
+        }
+
+        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+        return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_start_trace
+ *
+ * PARAMETERS:  Info        - Method info struct
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Start control method execution trace
+ *
+ ******************************************************************************/
+
+static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_ENTRY();
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE(status)) {
+                return;
+        }
+
+        if ((!acpi_gbl_trace_method_name) ||
+            (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
+                goto exit;
+        }
+
+        acpi_gbl_original_dbg_level = acpi_dbg_level;
+        acpi_gbl_original_dbg_layer = acpi_dbg_layer;
+
+        acpi_dbg_level = 0x00FFFFFF;
+        acpi_dbg_layer = ACPI_UINT32_MAX;
+
+        if (acpi_gbl_trace_dbg_level) {
+                acpi_dbg_level = acpi_gbl_trace_dbg_level;
+        }
+        if (acpi_gbl_trace_dbg_layer) {
+                acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
+        }
+
+      exit:
+        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_stop_trace
+ *
+ * PARAMETERS:  Info        - Method info struct
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Stop control method execution trace
+ *
+ ******************************************************************************/
+
+static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_ENTRY();
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE(status)) {
+                return;
+        }
+
+        if ((!acpi_gbl_trace_method_name) ||
+            (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
+                goto exit;
+        }
+
+        /* Disable further tracing if type is one-shot */
+
+        if (acpi_gbl_trace_flags & 1) {
+                acpi_gbl_trace_method_name = 0;
+                acpi_gbl_trace_dbg_level = 0;
+                acpi_gbl_trace_dbg_layer = 0;
+        }
+
+        acpi_dbg_level = acpi_gbl_original_dbg_level;
+        acpi_dbg_layer = acpi_gbl_original_dbg_layer;
+
+      exit:
+        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_execute_method
+ *
+ * PARAMETERS:  Info            - Method info block, contains:
+ *                  Node            - Method Node to execute
+ *                  obj_desc        - Method object
+ *                  Parameters      - List of parameters to pass to the method,
+ *                                    terminated by NULL. Params itself may be
+ *                                    NULL if no parameters are being passed.
+ *                  return_object   - Where to put method's return value (if
+ *                                    any). If NULL, no value is returned.
+ *                  parameter_type  - Type of Parameter list
+ *                  return_object   - Where to put method's return value (if
+ *                                    any). If NULL, no value is returned.
+ *                  pass_number     - Parse or execute pass
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute a control method
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
+{
+        acpi_status status;
+        union acpi_parse_object *op;
+        struct acpi_walk_state *walk_state;
+
+        ACPI_FUNCTION_TRACE(ps_execute_method);
+
+        /* Validate the Info and method Node */
+
+        if (!info || !info->resolved_node) {
+                return_ACPI_STATUS(AE_NULL_ENTRY);
+        }
+
+        /* Init for new method, wait on concurrency semaphore */
+
+        status =
+            acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
+                                           NULL);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /*
+         * The caller "owns" the parameters, so give each one an extra reference
+         */
+        acpi_ps_update_parameter_list(info, REF_INCREMENT);
+
+        /* Begin tracing if requested */
+
+        acpi_ps_start_trace(info);
+
+        /*
+         * Execute the method. Performs parse simultaneously
+         */
+        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+                          "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
+                          info->resolved_node->name.ascii, info->resolved_node,
+                          info->obj_desc));
+
+        /* Create and init a Root Node */
+
+        op = acpi_ps_create_scope_op();
+        if (!op) {
+                status = AE_NO_MEMORY;
+                goto cleanup;
+        }
+
+        /* Create and initialize a new walk state */
+
+        info->pass_number = ACPI_IMODE_EXECUTE;
+        walk_state =
+            acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
+                                      NULL, NULL);
+        if (!walk_state) {
+                status = AE_NO_MEMORY;
+                goto cleanup;
+        }
+
+        status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
+                                       info->obj_desc->method.aml_start,
+                                       info->obj_desc->method.aml_length, info,
+                                       info->pass_number);
+        if (ACPI_FAILURE(status)) {
+                acpi_ds_delete_walk_state(walk_state);
+                goto cleanup;
+        }
+
+        /* Invoke an internal method if necessary */
+
+        if (info->obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
+                status = info->obj_desc->method.implementation(walk_state);
+                info->return_object = walk_state->return_desc;
+
+                /* Cleanup states */
+
+                acpi_ds_scope_stack_clear(walk_state);
+                acpi_ps_cleanup_scope(&walk_state->parser_state);
+                acpi_ds_terminate_control_method(walk_state->method_desc,
+                                                 walk_state);
+                acpi_ds_delete_walk_state(walk_state);
+                goto cleanup;
+        }
+
+        /*
+         * Start method evaluation with an implicit return of zero.
+         * This is done for Windows compatibility.
+         */
+        if (acpi_gbl_enable_interpreter_slack) {
+                walk_state->implicit_return_obj =
+                    acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
+                if (!walk_state->implicit_return_obj) {
+                        status = AE_NO_MEMORY;
+                        acpi_ds_delete_walk_state(walk_state);
+                        goto cleanup;
+                }
+
+                walk_state->implicit_return_obj->integer.value = 0;
+        }
+
+        /* Parse the AML */
+
+        status = acpi_ps_parse_aml(walk_state);
+
+        /* walk_state was deleted by parse_aml */
+
+      cleanup:
+        acpi_ps_delete_parse_tree(op);
+
+        /* End optional tracing */
+
+        acpi_ps_stop_trace(info);
+
+        /* Take away the extra reference that we gave the parameters above */
+
+        acpi_ps_update_parameter_list(info, REF_DECREMENT);
+
+        /* Exit now if error above */
+
+        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 ObjDesc=%p\n",
+                                  info->return_object));
+                ACPI_DUMP_STACK_ENTRY(info->return_object);
+
+                status = AE_CTRL_RETURN_VALUE;
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ps_update_parameter_list
+ *
+ * PARAMETERS:  Info            - See struct acpi_evaluate_info
+ *                                (Used: parameter_type and Parameters)
+ *              Action          - Add or Remove reference
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Update reference count on all method parameter objects
+ *
+ ******************************************************************************/
+
+static void
+acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
+{
+        u32 i;
+
+        if (info->parameters) {
+
+                /* Update reference count for each parameter */
+
+                for (i = 0; info->parameters[i]; i++) {
+
+                        /* Ignore errors, just do them all */
+
+                        (void)acpi_ut_update_object_reference(info->
+                                                              parameters[i],
+                                                              action);
+                }
+        }
+}