diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/acpi/executer/exresnte.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-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!
Diffstat (limited to 'drivers/acpi/executer/exresnte.c')
-rw-r--r-- | drivers/acpi/executer/exresnte.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exresnte.c b/drivers/acpi/executer/exresnte.c new file mode 100644 index 0000000..7936329 --- /dev/null +++ b/drivers/acpi/executer/exresnte.c @@ -0,0 +1,289 @@ + +/****************************************************************************** + * + * Module Name: exresnte - 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/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> + + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exresnte") + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_resolve_node_to_value + * + * PARAMETERS: object_ptr - Pointer to a location that contains + * a pointer to a NS node, and will receive a + * pointer to the resolved object. + * walk_state - Current state. Valid only if executing AML + * code. NULL if simply resolving an object + * + * RETURN: Status + * + * DESCRIPTION: Resolve a Namespace node to a valued object + * + * Note: for some of the data types, the pointer attached to the Node + * can be either a pointer to an actual internal object or a pointer into the + * AML stream itself. These types are currently: + * + * ACPI_TYPE_INTEGER + * ACPI_TYPE_STRING + * ACPI_TYPE_BUFFER + * ACPI_TYPE_MUTEX + * ACPI_TYPE_PACKAGE + * + ******************************************************************************/ + +acpi_status +acpi_ex_resolve_node_to_value ( + struct acpi_namespace_node **object_ptr, + struct acpi_walk_state *walk_state) + +{ + acpi_status status = AE_OK; + union acpi_operand_object *source_desc; + union acpi_operand_object *obj_desc = NULL; + struct acpi_namespace_node *node; + acpi_object_type entry_type; + + + ACPI_FUNCTION_TRACE ("ex_resolve_node_to_value"); + + + /* + * The stack pointer points to a struct acpi_namespace_node (Node). Get the + * object that is attached to the Node. + */ + node = *object_ptr; + source_desc = acpi_ns_get_attached_object (node); + entry_type = acpi_ns_get_type ((acpi_handle) node); + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p source_desc=%p [%s]\n", + node, source_desc, acpi_ut_get_type_name (entry_type))); + + if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) || + (entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) { + /* There is always exactly one level of indirection */ + + node = ACPI_CAST_PTR (struct acpi_namespace_node, node->object); + source_desc = acpi_ns_get_attached_object (node); + entry_type = acpi_ns_get_type ((acpi_handle) node); + *object_ptr = node; + } + + /* + * Several object types require no further processing: + * 1) Devices rarely have an attached object, return the Node + * 2) Method locals and arguments have a pseudo-Node + */ + if (entry_type == ACPI_TYPE_DEVICE || + (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) { + return_ACPI_STATUS (AE_OK); + } + + if (!source_desc) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n", + node)); + return_ACPI_STATUS (AE_AML_NO_OPERAND); + } + + /* + * Action is based on the type of the Node, which indicates the type + * of the attached object or pointer + */ + switch (entry_type) { + case ACPI_TYPE_PACKAGE: + + if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_PACKAGE) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n", + acpi_ut_get_object_type_name (source_desc))); + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + status = acpi_ds_get_package_arguments (source_desc); + if (ACPI_SUCCESS (status)) { + /* Return an additional reference to the object */ + + obj_desc = source_desc; + acpi_ut_add_reference (obj_desc); + } + break; + + + case ACPI_TYPE_BUFFER: + + if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_BUFFER) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n", + acpi_ut_get_object_type_name (source_desc))); + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + status = acpi_ds_get_buffer_arguments (source_desc); + if (ACPI_SUCCESS (status)) { + /* Return an additional reference to the object */ + + obj_desc = source_desc; + acpi_ut_add_reference (obj_desc); + } + break; + + + case ACPI_TYPE_STRING: + + if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_STRING) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n", + acpi_ut_get_object_type_name (source_desc))); + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + /* Return an additional reference to the object */ + + obj_desc = source_desc; + acpi_ut_add_reference (obj_desc); + break; + + + case ACPI_TYPE_INTEGER: + + if (ACPI_GET_OBJECT_TYPE (source_desc) != ACPI_TYPE_INTEGER) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n", + acpi_ut_get_object_type_name (source_desc))); + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + /* Return an additional reference to the object */ + + obj_desc = source_desc; + acpi_ut_add_reference (obj_desc); + break; + + + 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 Node=%p source_desc=%p Type=%X\n", + node, source_desc, entry_type)); + + status = acpi_ex_read_data_from_field (walk_state, source_desc, &obj_desc); + break; + + /* + * For these objects, just return the object attached to the Node + */ + case ACPI_TYPE_MUTEX: + case ACPI_TYPE_METHOD: + case ACPI_TYPE_POWER: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_EVENT: + case ACPI_TYPE_REGION: + + /* Return an additional reference to the object */ + + obj_desc = source_desc; + acpi_ut_add_reference (obj_desc); + break; + + + /* TYPE_ANY is untyped, and thus there is no object associated with it */ + + case ACPI_TYPE_ANY: + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n", + node)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ + + + case ACPI_TYPE_LOCAL_REFERENCE: + + switch (source_desc->reference.opcode) { + case AML_LOAD_OP: + + /* This is a ddb_handle */ + /* Return an additional reference to the object */ + + obj_desc = source_desc; + acpi_ut_add_reference (obj_desc); + break; + + default: + /* No named references are allowed here */ + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported Reference opcode %X (%s)\n", + source_desc->reference.opcode, + acpi_ps_get_opcode_name (source_desc->reference.opcode))); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + break; + + + /* Default case is for unknown types */ + + default: + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n", + node, entry_type)); + + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + + } /* switch (entry_type) */ + + + /* Put the object descriptor on the stack */ + + *object_ptr = (void *) obj_desc; + return_ACPI_STATUS (status); +} + + |