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, 546 insertions, 0 deletions

diff --git a/drivers/acpi/executer/exresolv.c b/drivers/acpi/executer/exresolv.c
new file mode 100644
index 000000000000..7be604911156
--- /dev/null
+++ b/drivers/acpi/executer/exresolv.c
@@ -0,0 +1,546 @@
+
+/******************************************************************************
+ *
+ * Module Name: exresolv - AML Interpreter object resolution
+ *
+ *****************************************************************************/
+
+/*
+ * 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/amlcode.h>
+#include <acpi/acdispat.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acparser.h>
+
+
+#define _COMPONENT          ACPI_EXECUTER
+         ACPI_MODULE_NAME    ("exresolv")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_to_value
+ *
+ * PARAMETERS:  **stack_ptr         - Points to entry on obj_stack, which can
+ *                                    be either an (union acpi_operand_object *)
+ *                                    or an acpi_handle.
+ *              walk_state          - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert Reference objects to values
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_to_value (
+        union acpi_operand_object       **stack_ptr,
+        struct acpi_walk_state          *walk_state)
+{
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ex_resolve_to_value", stack_ptr);
+
+
+        if (!stack_ptr || !*stack_ptr) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
+                return_ACPI_STATUS (AE_AML_NO_OPERAND);
+        }
+
+        /*
+         * The entity pointed to by the stack_ptr can be either
+         * 1) A valid union acpi_operand_object, or
+         * 2) A struct acpi_namespace_node (named_obj)
+         */
+        if (ACPI_GET_DESCRIPTOR_TYPE (*stack_ptr) == ACPI_DESC_TYPE_OPERAND) {
+                status = acpi_ex_resolve_object_to_value (stack_ptr, walk_state);
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+        }
+
+        /*
+         * Object on the stack may have changed if acpi_ex_resolve_object_to_value()
+         * was called (i.e., we can't use an _else_ here.)
+         */
+        if (ACPI_GET_DESCRIPTOR_TYPE (*stack_ptr) == ACPI_DESC_TYPE_NAMED) {
+                status = acpi_ex_resolve_node_to_value (
+                                  ACPI_CAST_INDIRECT_PTR (struct acpi_namespace_node, stack_ptr),
+                                  walk_state);
+                if (ACPI_FAILURE (status)) {
+                        return_ACPI_STATUS (status);
+                }
+        }
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr));
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_object_to_value
+ *
+ * PARAMETERS:  stack_ptr       - Pointer to a stack location that contains a
+ *                                ptr to an internal object.
+ *              walk_state      - Current method state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Retrieve the value from an internal object.  The Reference type
+ *              uses the associated AML opcode to determine the value.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_object_to_value (
+        union acpi_operand_object       **stack_ptr,
+        struct acpi_walk_state          *walk_state)
+{
+        acpi_status                     status = AE_OK;
+        union acpi_operand_object       *stack_desc;
+        void                            *temp_node;
+        union acpi_operand_object       *obj_desc;
+        u16                             opcode;
+
+
+        ACPI_FUNCTION_TRACE ("ex_resolve_object_to_value");
+
+
+        stack_desc = *stack_ptr;
+
+        /* This is an union acpi_operand_object    */
+
+        switch (ACPI_GET_OBJECT_TYPE (stack_desc)) {
+        case ACPI_TYPE_LOCAL_REFERENCE:
+
+                opcode = stack_desc->reference.opcode;
+
+                switch (opcode) {
+                case AML_NAME_OP:
+
+                        /*
+                         * Convert indirect name ptr to a direct name ptr.
+                         * Then, acpi_ex_resolve_node_to_value can be used to get the value
+                         */
+                        temp_node = stack_desc->reference.object;
+
+                        /* Delete the Reference Object */
+
+                        acpi_ut_remove_reference (stack_desc);
+
+                        /* Put direct name pointer onto stack and exit */
+
+                        (*stack_ptr) = temp_node;
+                        break;
+
+
+                case AML_LOCAL_OP:
+                case AML_ARG_OP:
+
+                        /*
+                         * Get the local from the method's state info
+                         * Note: this increments the local's object reference count
+                         */
+                        status = acpi_ds_method_data_get_value (opcode,
+                                          stack_desc->reference.offset, walk_state, &obj_desc);
+                        if (ACPI_FAILURE (status)) {
+                                return_ACPI_STATUS (status);
+                        }
+
+                        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] value_obj is %p\n",
+                                stack_desc->reference.offset, obj_desc));
+
+                        /*
+                         * Now we can delete the original Reference Object and
+                         * replace it with the resolved value
+                         */
+                        acpi_ut_remove_reference (stack_desc);
+                        *stack_ptr = obj_desc;
+                        break;
+
+
+                case AML_INDEX_OP:
+
+                        switch (stack_desc->reference.target_type) {
+                        case ACPI_TYPE_BUFFER_FIELD:
+
+                                /* Just return - leave the Reference on the stack */
+                                break;
+
+
+                        case ACPI_TYPE_PACKAGE:
+
+                                obj_desc = *stack_desc->reference.where;
+                                if (obj_desc) {
+                                        /*
+                                         * Valid obj descriptor, copy pointer to return value
+                                         * (i.e., dereference the package index)
+                                         * Delete the ref object, increment the returned object
+                                         */
+                                        acpi_ut_remove_reference (stack_desc);
+                                        acpi_ut_add_reference (obj_desc);
+                                        *stack_ptr = obj_desc;
+                                }
+                                else {
+                                        /*
+                                         * A NULL object descriptor means an unitialized element of
+                                         * the package, can't dereference it
+                                         */
+                                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+                                                "Attempt to deref an Index to NULL pkg element Idx=%p\n",
+                                                stack_desc));
+                                        status = AE_AML_UNINITIALIZED_ELEMENT;
+                                }
+                                break;
+
+
+                        default:
+
+                                /* Invalid reference object */
+
+                                ACPI_REPORT_ERROR ((
+                                        "During resolve, Unknown target_type %X in Index/Reference obj %p\n",
+                                        stack_desc->reference.target_type, stack_desc));
+                                status = AE_AML_INTERNAL;
+                                break;
+                        }
+                        break;
+
+
+                case AML_REF_OF_OP:
+                case AML_DEBUG_OP:
+                case AML_LOAD_OP:
+
+                        /* Just leave the object as-is */
+
+                        break;
+
+
+                default:
+
+                        ACPI_REPORT_ERROR (("During resolve, Unknown Reference opcode %X (%s) in %p\n",
+                                opcode, acpi_ps_get_opcode_name (opcode), stack_desc));
+                        status = AE_AML_INTERNAL;
+                        break;
+                }
+                break;
+
+
+        case ACPI_TYPE_BUFFER:
+
+                status = acpi_ds_get_buffer_arguments (stack_desc);
+                break;
+
+
+        case ACPI_TYPE_PACKAGE:
+
+                status = acpi_ds_get_package_arguments (stack_desc);
+                break;
+
+
+        /*
+         * These cases may never happen here, but just in case..
+         */
+        case ACPI_TYPE_BUFFER_FIELD:
+        case ACPI_TYPE_LOCAL_REGION_FIELD:
+        case ACPI_TYPE_LOCAL_BANK_FIELD:
+        case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "field_read source_desc=%p Type=%X\n",
+                        stack_desc, ACPI_GET_OBJECT_TYPE (stack_desc)));
+
+                status = acpi_ex_read_data_from_field (walk_state, stack_desc, &obj_desc);
+                *stack_ptr = (void *) obj_desc;
+                break;
+
+        default:
+                break;
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_multiple
+ *
+ * PARAMETERS:  walk_state          - Current state (contains AML opcode)
+ *              Operand             - Starting point for resolution
+ *              return_type         - Where the object type is returned
+ *              return_desc         - Where the resolved object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Return the base object and type.  Traverse a reference list if
+ *              necessary to get to the base object.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_multiple (
+        struct acpi_walk_state          *walk_state,
+        union acpi_operand_object       *operand,
+        acpi_object_type                *return_type,
+        union acpi_operand_object       **return_desc)
+{
+        union acpi_operand_object       *obj_desc = (void *) operand;
+        struct acpi_namespace_node      *node;
+        acpi_object_type                type;
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_ex_resolve_multiple");
+
+
+        /*
+         * Operand can be either a namespace node or an operand descriptor
+         */
+        switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) {
+        case ACPI_DESC_TYPE_OPERAND:
+                type = obj_desc->common.type;
+                break;
+
+        case ACPI_DESC_TYPE_NAMED:
+                type = ((struct acpi_namespace_node *) obj_desc)->type;
+                obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) obj_desc);
+
+                /* If we had an Alias node, use the attached object for type info */
+
+                if (type == ACPI_TYPE_LOCAL_ALIAS) {
+                        type = ((struct acpi_namespace_node *) obj_desc)->type;
+                        obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) obj_desc);
+                }
+                break;
+
+        default:
+                return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+        }
+
+
+        /*
+         * If type is anything other than a reference, we are done
+         */
+        if (type != ACPI_TYPE_LOCAL_REFERENCE) {
+                goto exit;
+        }
+
+        /*
+         * For reference objects created via the ref_of or Index operators,
+         * we need to get to the base object (as per the ACPI specification
+         * of the object_type and size_of operators). This means traversing
+         * the list of possibly many nested references.
+         */
+        while (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
+                switch (obj_desc->reference.opcode) {
+                case AML_REF_OF_OP:
+
+                        /* Dereference the reference pointer */
+
+                        node = obj_desc->reference.object;
+
+                        /* All "References" point to a NS node */
+
+                        if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
+                                ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n",
+                                                node, acpi_ut_get_descriptor_name (node)));
+                                return_ACPI_STATUS (AE_AML_INTERNAL);
+                        }
+
+                        /* Get the attached object */
+
+                        obj_desc = acpi_ns_get_attached_object (node);
+                        if (!obj_desc) {
+                                /* No object, use the NS node type */
+
+                                type = acpi_ns_get_type (node);
+                                goto exit;
+                        }
+
+                        /* Check for circular references */
+
+                        if (obj_desc == operand) {
+                                return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
+                        }
+                        break;
+
+
+                case AML_INDEX_OP:
+
+                        /* Get the type of this reference (index into another object) */
+
+                        type = obj_desc->reference.target_type;
+                        if (type != ACPI_TYPE_PACKAGE) {
+                                goto exit;
+                        }
+
+                        /*
+                         * The main object is a package, we want to get the type
+                         * of the individual package element that is referenced by
+                         * the index.
+                         *
+                         * This could of course in turn be another reference object.
+                         */
+                        obj_desc = *(obj_desc->reference.where);
+                        if (!obj_desc) {
+                                /* NULL package elements are allowed */
+
+                                type = 0; /* Uninitialized */
+                                goto exit;
+                        }
+                        break;
+
+
+                case AML_INT_NAMEPATH_OP:
+
+                        /* Dereference the reference pointer */
+
+                        node = obj_desc->reference.node;
+
+                        /* All "References" point to a NS node */
+
+                        if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
+                                ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Not a NS node %p [%s]\n",
+                                                node, acpi_ut_get_descriptor_name (node)));
+                           return_ACPI_STATUS (AE_AML_INTERNAL);
+                        }
+
+                        /* Get the attached object */
+
+                        obj_desc = acpi_ns_get_attached_object (node);
+                        if (!obj_desc) {
+                                /* No object, use the NS node type */
+
+                                type = acpi_ns_get_type (node);
+                                goto exit;
+                        }
+
+                        /* Check for circular references */
+
+                        if (obj_desc == operand) {
+                                return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
+                        }
+                        break;
+
+
+                case AML_LOCAL_OP:
+                case AML_ARG_OP:
+
+                        if (return_desc) {
+                                status = acpi_ds_method_data_get_value (obj_desc->reference.opcode,
+                                                  obj_desc->reference.offset, walk_state, &obj_desc);
+                                if (ACPI_FAILURE (status)) {
+                                        return_ACPI_STATUS (status);
+                                }
+                                acpi_ut_remove_reference (obj_desc);
+                        }
+                        else {
+                                status = acpi_ds_method_data_get_node (obj_desc->reference.opcode,
+                                                 obj_desc->reference.offset, walk_state, &node);
+                                if (ACPI_FAILURE (status)) {
+                                        return_ACPI_STATUS (status);
+                                }
+
+                                obj_desc = acpi_ns_get_attached_object (node);
+                                if (!obj_desc) {
+                                        type = ACPI_TYPE_ANY;
+                                        goto exit;
+                                }
+                        }
+                        break;
+
+
+                case AML_DEBUG_OP:
+
+                        /* The Debug Object is of type "debug_object" */
+
+                        type = ACPI_TYPE_DEBUG_OBJECT;
+                        goto exit;
+
+
+                default:
+
+                        ACPI_REPORT_ERROR (("acpi_ex_resolve_multiple: Unknown Reference subtype %X\n",
+                                obj_desc->reference.opcode));
+                        return_ACPI_STATUS (AE_AML_INTERNAL);
+                }
+        }
+
+        /*
+         * Now we are guaranteed to have an object that has not been created
+         * via the ref_of or Index operators.
+         */
+        type = ACPI_GET_OBJECT_TYPE (obj_desc);
+
+
+exit:
+        /* Convert internal types to external types */
+
+        switch (type) {
+        case ACPI_TYPE_LOCAL_REGION_FIELD:
+        case ACPI_TYPE_LOCAL_BANK_FIELD:
+        case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+                type = ACPI_TYPE_FIELD_UNIT;
+                break;
+
+        case ACPI_TYPE_LOCAL_SCOPE:
+
+                /* Per ACPI Specification, Scope is untyped */
+
+                type = ACPI_TYPE_ANY;
+                break;
+
+        default:
+                /* No change to Type required */
+                break;
+        }
+
+        *return_type = type;
+        if (return_desc) {
+                *return_desc = obj_desc;
+        }
+        return_ACPI_STATUS (AE_OK);
+}
+
+