diff options
Diffstat (limited to 'drivers/acpi/acpica/exstore.c')
| -rw-r--r-- | drivers/acpi/acpica/exstore.c | 716 |
1 files changed, 716 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exstore.c b/drivers/acpi/acpica/exstore.c new file mode 100644 index 000000000000..6f5647fdc006 --- /dev/null +++ b/drivers/acpi/acpica/exstore.c @@ -0,0 +1,716 @@ + +/****************************************************************************** + * + * Module Name: exstore - AML Interpreter object store support + * + *****************************************************************************/ + +/* + * 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/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/amlcode.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_EXECUTER +ACPI_MODULE_NAME("exstore") + +/* Local prototypes */ +static void +acpi_ex_do_debug_object(union acpi_operand_object *source_desc, + u32 level, u32 index); + +static acpi_status +acpi_ex_store_object_to_index(union acpi_operand_object *val_desc, + union acpi_operand_object *dest_desc, + struct acpi_walk_state *walk_state); + +/******************************************************************************* + * + * FUNCTION: acpi_ex_do_debug_object + * + * PARAMETERS: source_desc - Value to be stored + * Level - Indentation level (used for packages) + * Index - Current package element, zero if not pkg + * + * RETURN: None + * + * DESCRIPTION: Handles stores to the Debug Object. + * + ******************************************************************************/ + +static void +acpi_ex_do_debug_object(union acpi_operand_object *source_desc, + u32 level, u32 index) +{ + u32 i; + + ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc); + + /* Print line header as long as we are not in the middle of an object display */ + + if (!((level > 0) && index == 0)) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s", + level, " ")); + } + + /* Display index for package output only */ + + if (index > 0) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + "(%.2u) ", index - 1)); + } + + if (!source_desc) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[Null Object]\n")); + return_VOID; + } + + if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s ", + acpi_ut_get_object_type_name + (source_desc))); + + if (!acpi_ut_valid_internal_object(source_desc)) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + "%p, Invalid Internal Object!\n", + source_desc)); + return_VOID; + } + } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == + ACPI_DESC_TYPE_NAMED) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n", + acpi_ut_get_type_name(((struct + acpi_namespace_node + *)source_desc)-> + type), + source_desc)); + return_VOID; + } else { + return_VOID; + } + + /* source_desc is of type ACPI_DESC_TYPE_OPERAND */ + + switch (ACPI_GET_OBJECT_TYPE(source_desc)) { + case ACPI_TYPE_INTEGER: + + /* Output correct integer width */ + + if (acpi_gbl_integer_byte_width == 4) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n", + (u32) source_desc->integer. + value)); + } else { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + "0x%8.8X%8.8X\n", + ACPI_FORMAT_UINT64(source_desc-> + integer. + value))); + } + break; + + case ACPI_TYPE_BUFFER: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n", + (u32) source_desc->buffer.length)); + ACPI_DUMP_BUFFER(source_desc->buffer.pointer, + (source_desc->buffer.length < + 256) ? source_desc->buffer.length : 256); + break; + + case ACPI_TYPE_STRING: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n", + source_desc->string.length, + source_desc->string.pointer)); + break; + + case ACPI_TYPE_PACKAGE: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + "[Contains 0x%.2X Elements]\n", + source_desc->package.count)); + + /* Output the entire contents of the package */ + + for (i = 0; i < source_desc->package.count; i++) { + acpi_ex_do_debug_object(source_desc->package. + elements[i], level + 4, i + 1); + } + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s] ", + acpi_ut_get_reference_name(source_desc))); + + /* Decode the reference */ + + switch (source_desc->reference.class) { + case ACPI_REFCLASS_INDEX: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%X\n", + source_desc->reference.value)); + break; + + case ACPI_REFCLASS_TABLE: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + "Table Index 0x%X\n", + source_desc->reference.value)); + break; + + default: + break; + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, " ")); + + /* Check for valid node first, then valid object */ + + if (source_desc->reference.node) { + if (ACPI_GET_DESCRIPTOR_TYPE + (source_desc->reference.node) != + ACPI_DESC_TYPE_NAMED) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + " %p - Not a valid namespace node\n", + source_desc->reference. + node)); + } else { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, + "Node %p [%4.4s] ", + source_desc->reference. + node, + (source_desc->reference. + node)->name.ascii)); + + switch ((source_desc->reference.node)->type) { + + /* These types have no attached object */ + + case ACPI_TYPE_DEVICE: + acpi_os_printf("Device\n"); + break; + + case ACPI_TYPE_THERMAL: + acpi_os_printf("Thermal Zone\n"); + break; + + default: + acpi_ex_do_debug_object((source_desc-> + reference. + node)->object, + level + 4, 0); + break; + } + } + } else if (source_desc->reference.object) { + if (ACPI_GET_DESCRIPTOR_TYPE + (source_desc->reference.object) == + ACPI_DESC_TYPE_NAMED) { + acpi_ex_do_debug_object(((struct + acpi_namespace_node *) + source_desc->reference. + object)->object, + level + 4, 0); + } else { + acpi_ex_do_debug_object(source_desc->reference. + object, level + 4, 0); + } + } + break; + + default: + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p\n", + source_desc)); + break; + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n")); + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_store + * + * PARAMETERS: *source_desc - Value to be stored + * *dest_desc - Where to store it. Must be an NS node + * or an union acpi_operand_object of type + * Reference; + * walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Store the value described by source_desc into the location + * described by dest_desc. Called by various interpreter + * functions to store the result of an operation into + * the destination operand -- not just simply the actual "Store" + * ASL operator. + * + ******************************************************************************/ + +acpi_status +acpi_ex_store(union acpi_operand_object *source_desc, + union acpi_operand_object *dest_desc, + struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + union acpi_operand_object *ref_desc = dest_desc; + + ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc); + + /* Validate parameters */ + + if (!source_desc || !dest_desc) { + ACPI_ERROR((AE_INFO, "Null parameter")); + return_ACPI_STATUS(AE_AML_NO_OPERAND); + } + + /* dest_desc can be either a namespace node or an ACPI object */ + + if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) { + /* + * Dest is a namespace node, + * Storing an object into a Named node. + */ + status = acpi_ex_store_object_to_node(source_desc, + (struct + acpi_namespace_node *) + dest_desc, walk_state, + ACPI_IMPLICIT_CONVERSION); + + return_ACPI_STATUS(status); + } + + /* Destination object must be a Reference or a Constant object */ + + switch (ACPI_GET_OBJECT_TYPE(dest_desc)) { + case ACPI_TYPE_LOCAL_REFERENCE: + break; + + case ACPI_TYPE_INTEGER: + + /* Allow stores to Constants -- a Noop as per ACPI spec */ + + if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) { + return_ACPI_STATUS(AE_OK); + } + + /*lint -fallthrough */ + + default: + + /* Destination is not a Reference object */ + + ACPI_ERROR((AE_INFO, + "Target is not a Reference or Constant object - %s [%p]", + acpi_ut_get_object_type_name(dest_desc), + dest_desc)); + + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); + } + + /* + * Examine the Reference class. These cases are handled: + * + * 1) Store to Name (Change the object associated with a name) + * 2) Store to an indexed area of a Buffer or Package + * 3) Store to a Method Local or Arg + * 4) Store to the debug object + */ + switch (ref_desc->reference.class) { + case ACPI_REFCLASS_REFOF: + + /* Storing an object into a Name "container" */ + + status = acpi_ex_store_object_to_node(source_desc, + ref_desc->reference. + object, walk_state, + ACPI_IMPLICIT_CONVERSION); + break; + + case ACPI_REFCLASS_INDEX: + + /* Storing to an Index (pointer into a packager or buffer) */ + + status = + acpi_ex_store_object_to_index(source_desc, ref_desc, + walk_state); + break; + + case ACPI_REFCLASS_LOCAL: + case ACPI_REFCLASS_ARG: + + /* Store to a method local/arg */ + + status = + acpi_ds_store_object_to_local(ref_desc->reference.class, + ref_desc->reference.value, + source_desc, walk_state); + break; + + case ACPI_REFCLASS_DEBUG: + + /* + * Storing to the Debug object causes the value stored to be + * displayed and otherwise has no effect -- see ACPI Specification + */ + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "**** Write to Debug Object: Object %p %s ****:\n\n", + source_desc, + acpi_ut_get_object_type_name(source_desc))); + + acpi_ex_do_debug_object(source_desc, 0, 0); + break; + + default: + + ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X", + ref_desc->reference.class)); + ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO); + + status = AE_AML_INTERNAL; + break; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_store_object_to_index + * + * PARAMETERS: *source_desc - Value to be stored + * *dest_desc - Named object to receive the value + * walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Store the object to indexed Buffer or Package element + * + ******************************************************************************/ + +static acpi_status +acpi_ex_store_object_to_index(union acpi_operand_object *source_desc, + union acpi_operand_object *index_desc, + struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + union acpi_operand_object *obj_desc; + union acpi_operand_object *new_desc; + u8 value = 0; + u32 i; + + ACPI_FUNCTION_TRACE(ex_store_object_to_index); + + /* + * Destination must be a reference pointer, and + * must point to either a buffer or a package + */ + switch (index_desc->reference.target_type) { + case ACPI_TYPE_PACKAGE: + /* + * Storing to a package element. Copy the object and replace + * any existing object with the new object. No implicit + * conversion is performed. + * + * The object at *(index_desc->Reference.Where) is the + * element within the package that is to be modified. + * The parent package object is at index_desc->Reference.Object + */ + obj_desc = *(index_desc->reference.where); + + if (ACPI_GET_OBJECT_TYPE(source_desc) == + ACPI_TYPE_LOCAL_REFERENCE + && source_desc->reference.class == ACPI_REFCLASS_TABLE) { + + /* This is a DDBHandle, just add a reference to it */ + + acpi_ut_add_reference(source_desc); + new_desc = source_desc; + } else { + /* Normal object, copy it */ + + status = + acpi_ut_copy_iobject_to_iobject(source_desc, + &new_desc, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + + if (obj_desc) { + + /* Decrement reference count by the ref count of the parent package */ + + for (i = 0; i < ((union acpi_operand_object *) + index_desc->reference.object)->common. + reference_count; i++) { + acpi_ut_remove_reference(obj_desc); + } + } + + *(index_desc->reference.where) = new_desc; + + /* Increment ref count by the ref count of the parent package-1 */ + + for (i = 1; i < ((union acpi_operand_object *) + index_desc->reference.object)->common. + reference_count; i++) { + acpi_ut_add_reference(new_desc); + } + + break; + + case ACPI_TYPE_BUFFER_FIELD: + + /* + * Store into a Buffer or String (not actually a real buffer_field) + * at a location defined by an Index. + * + * The first 8-bit element of the source object is written to the + * 8-bit Buffer location defined by the Index destination object, + * according to the ACPI 2.0 specification. + */ + + /* + * Make sure the target is a Buffer or String. An error should + * not happen here, since the reference_object was constructed + * by the INDEX_OP code. + */ + obj_desc = index_desc->reference.object; + if ((ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_BUFFER) && + (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_STRING)) { + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); + } + + /* + * The assignment of the individual elements will be slightly + * different for each source type. + */ + switch (ACPI_GET_OBJECT_TYPE(source_desc)) { + case ACPI_TYPE_INTEGER: + + /* Use the least-significant byte of the integer */ + + value = (u8) (source_desc->integer.value); + break; + + case ACPI_TYPE_BUFFER: + case ACPI_TYPE_STRING: + + /* Note: Takes advantage of common string/buffer fields */ + + value = source_desc->buffer.pointer[0]; + break; + + default: + + /* All other types are invalid */ + + ACPI_ERROR((AE_INFO, + "Source must be Integer/Buffer/String type, not %s", + acpi_ut_get_object_type_name(source_desc))); + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); + } + + /* Store the source value into the target buffer byte */ + + obj_desc->buffer.pointer[index_desc->reference.value] = value; + break; + + default: + ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField")); + status = AE_AML_OPERAND_TYPE; + break; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_store_object_to_node + * + * PARAMETERS: source_desc - Value to be stored + * Node - Named object to receive the value + * walk_state - Current walk state + * implicit_conversion - Perform implicit conversion (yes/no) + * + * RETURN: Status + * + * DESCRIPTION: Store the object to the named object. + * + * The Assignment of an object to a named object is handled here + * The value passed in will replace the current value (if any) + * with the input value. + * + * When storing into an object the data is converted to the + * target object type then stored in the object. This means + * that the target object type (for an initialized target) will + * not be changed by a store operation. + * + * Assumes parameters are already validated. + * + ******************************************************************************/ + +acpi_status +acpi_ex_store_object_to_node(union acpi_operand_object *source_desc, + struct acpi_namespace_node *node, + struct acpi_walk_state *walk_state, + u8 implicit_conversion) +{ + acpi_status status = AE_OK; + union acpi_operand_object *target_desc; + union acpi_operand_object *new_desc; + acpi_object_type target_type; + + ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc); + + /* Get current type of the node, and object attached to Node */ + + target_type = acpi_ns_get_type(node); + target_desc = acpi_ns_get_attached_object(node); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n", + source_desc, + acpi_ut_get_object_type_name(source_desc), node, + acpi_ut_get_type_name(target_type))); + + /* + * Resolve the source object to an actual value + * (If it is a reference object) + */ + status = acpi_ex_resolve_object(&source_desc, target_type, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* If no implicit conversion, drop into the default case below */ + + if ((!implicit_conversion) || + ((walk_state->opcode == AML_COPY_OP) && + (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) && + (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) && + (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) { + /* + * Force execution of default (no implicit conversion). Note: + * copy_object does not perform an implicit conversion, as per the ACPI + * spec -- except in case of region/bank/index fields -- because these + * objects must retain their original type permanently. + */ + target_type = ACPI_TYPE_ANY; + } + + /* Do the actual store operation */ + + switch (target_type) { + case ACPI_TYPE_BUFFER_FIELD: + case ACPI_TYPE_LOCAL_REGION_FIELD: + case ACPI_TYPE_LOCAL_BANK_FIELD: + case ACPI_TYPE_LOCAL_INDEX_FIELD: + + /* For fields, copy the source data to the target field. */ + + status = acpi_ex_write_data_to_field(source_desc, target_desc, + &walk_state->result_obj); + break; + + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + + /* + * These target types are all of type Integer/String/Buffer, and + * therefore support implicit conversion before the store. + * + * Copy and/or convert the source object to a new target object + */ + status = + acpi_ex_store_object_to_object(source_desc, target_desc, + &new_desc, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + if (new_desc != target_desc) { + /* + * Store the new new_desc as the new value of the Name, and set + * the Name's type to that of the value being stored in it. + * source_desc reference count is incremented by attach_object. + * + * Note: This may change the type of the node if an explicit store + * has been performed such that the node/object type has been + * changed. + */ + status = + acpi_ns_attach_object(node, new_desc, + new_desc->common.type); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Store %s into %s via Convert/Attach\n", + acpi_ut_get_object_type_name + (source_desc), + acpi_ut_get_object_type_name + (new_desc))); + } + break; + + default: + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Storing %s (%p) directly into node (%p) with no implicit conversion\n", + acpi_ut_get_object_type_name(source_desc), + source_desc, node)); + + /* No conversions for all other types. Just attach the source object */ + + status = acpi_ns_attach_object(node, source_desc, + ACPI_GET_OBJECT_TYPE + (source_desc)); + break; + } + + return_ACPI_STATUS(status); +} |