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![Bob Moore](/assets/img/avatar_default.png)
ACPICA commit 738d7b0726e6c0458ef93c0a01c0377490888d1e Affects all source modules and utility signons. Link: https://github.com/acpica/acpica/commit/738d7b07 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
545 lines
14 KiB
C
545 lines
14 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: dsobject - Dispatcher object management routines
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*
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* Copyright (C) 2000 - 2022, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acdispat.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dsobject")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_object
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*
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* PARAMETERS: walk_state - Current walk state
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* op - Parser object to be translated
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op object to the equivalent namespace object
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* Simple objects are any objects other than a package object!
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*
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******************************************************************************/
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acpi_status
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acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ds_build_internal_object);
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*obj_desc_ptr = NULL;
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if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
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/*
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* This is a named object reference. If this name was
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* previously looked up in the namespace, it was stored in
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* this op. Otherwise, go ahead and look it up now
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*/
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if (!op->common.node) {
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/* Check if we are resolving a named reference within a package */
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if ((op->common.parent->common.aml_opcode ==
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AML_PACKAGE_OP)
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|| (op->common.parent->common.aml_opcode ==
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AML_VARIABLE_PACKAGE_OP)) {
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/*
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* We won't resolve package elements here, we will do this
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* after all ACPI tables are loaded into the namespace. This
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* behavior supports both forward references to named objects
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* and external references to objects in other tables.
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*/
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goto create_new_object;
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} else {
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status = acpi_ns_lookup(walk_state->scope_info,
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op->common.value.string,
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ACPI_TYPE_ANY,
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ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT |
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ACPI_NS_DONT_OPEN_SCOPE,
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NULL,
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ACPI_CAST_INDIRECT_PTR
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(struct
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acpi_namespace_node,
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&(op->common.node)));
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR_NAMESPACE(walk_state->
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scope_info,
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op->common.value.
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string, status);
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return_ACPI_STATUS(status);
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}
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}
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}
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}
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create_new_object:
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/* Create and init a new internal ACPI object */
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obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
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(op->common.aml_opcode))->
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object_type);
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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status =
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acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
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&obj_desc);
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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/*
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* Handling for unresolved package reference elements.
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* These are elements that are namepaths.
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*/
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if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
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(op->common.parent->common.aml_opcode == AML_VARIABLE_PACKAGE_OP)) {
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obj_desc->reference.resolved = TRUE;
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if ((op->common.aml_opcode == AML_INT_NAMEPATH_OP) &&
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!obj_desc->reference.node) {
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/*
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* Name was unresolved above.
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* Get the prefix node for later lookup
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*/
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obj_desc->reference.node =
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walk_state->scope_info->scope.node;
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obj_desc->reference.aml = op->common.aml;
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obj_desc->reference.resolved = FALSE;
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}
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}
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*obj_desc_ptr = obj_desc;
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_build_internal_buffer_obj
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*
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* PARAMETERS: walk_state - Current walk state
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* op - Parser object to be translated
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* buffer_length - Length of the buffer
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* obj_desc_ptr - Where the ACPI internal object is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Translate a parser Op package object to the equivalent
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* namespace object
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*
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******************************************************************************/
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acpi_status
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acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u32 buffer_length,
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union acpi_operand_object **obj_desc_ptr)
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{
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union acpi_parse_object *arg;
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union acpi_operand_object *obj_desc;
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union acpi_parse_object *byte_list;
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u32 byte_list_length = 0;
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ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
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/*
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* If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
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* The buffer object already exists (from the NS node), otherwise it must
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* be created.
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*/
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obj_desc = *obj_desc_ptr;
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if (!obj_desc) {
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/* Create a new buffer object */
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obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
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*obj_desc_ptr = obj_desc;
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if (!obj_desc) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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}
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/*
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* Second arg is the buffer data (optional) byte_list can be either
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* individual bytes or a string initializer. In either case, a
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* byte_list appears in the AML.
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*/
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arg = op->common.value.arg; /* skip first arg */
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byte_list = arg->named.next;
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if (byte_list) {
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if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
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ACPI_ERROR((AE_INFO,
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"Expecting bytelist, found AML opcode 0x%X in op %p",
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byte_list->common.aml_opcode, byte_list));
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acpi_ut_remove_reference(obj_desc);
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return (AE_TYPE);
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}
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byte_list_length = (u32) byte_list->common.value.integer;
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}
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/*
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* The buffer length (number of bytes) will be the larger of:
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* 1) The specified buffer length and
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* 2) The length of the initializer byte list
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*/
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obj_desc->buffer.length = buffer_length;
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if (byte_list_length > buffer_length) {
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obj_desc->buffer.length = byte_list_length;
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}
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/* Allocate the buffer */
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if (obj_desc->buffer.length == 0) {
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obj_desc->buffer.pointer = NULL;
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Buffer defined with zero length in AML, creating\n"));
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} else {
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obj_desc->buffer.pointer =
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ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
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if (!obj_desc->buffer.pointer) {
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acpi_ut_delete_object_desc(obj_desc);
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Initialize buffer from the byte_list (if present) */
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if (byte_list) {
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memcpy(obj_desc->buffer.pointer, byte_list->named.data,
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byte_list_length);
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}
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}
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obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
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op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_create_node
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*
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* PARAMETERS: walk_state - Current walk state
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* node - NS Node to be initialized
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* op - Parser object to be translated
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create the object to be associated with a namespace node
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*
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******************************************************************************/
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acpi_status
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acpi_ds_create_node(struct acpi_walk_state *walk_state,
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struct acpi_namespace_node *node,
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union acpi_parse_object *op)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
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/*
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* Because of the execution pass through the non-control-method
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* parts of the table, we can arrive here twice. Only init
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* the named object node the first time through
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*/
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if (acpi_ns_get_attached_object(node)) {
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return_ACPI_STATUS(AE_OK);
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}
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if (!op->common.value.arg) {
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/* No arguments, there is nothing to do */
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return_ACPI_STATUS(AE_OK);
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}
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/* Build an internal object for the argument(s) */
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status =
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acpi_ds_build_internal_object(walk_state, op->common.value.arg,
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&obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Re-type the object according to its argument */
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node->type = obj_desc->common.type;
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/* Attach obj to node */
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status = acpi_ns_attach_object(node, obj_desc, node->type);
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/* Remove local reference to the object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_init_object_from_op
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*
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* PARAMETERS: walk_state - Current walk state
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* op - Parser op used to init the internal object
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* opcode - AML opcode associated with the object
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* ret_obj_desc - Namespace object to be initialized
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize a namespace object from a parser Op and its
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* associated arguments. The namespace object is a more compact
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* representation of the Op and its arguments.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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u16 opcode,
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union acpi_operand_object **ret_obj_desc)
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{
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const struct acpi_opcode_info *op_info;
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union acpi_operand_object *obj_desc;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(ds_init_object_from_op);
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obj_desc = *ret_obj_desc;
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op_info = acpi_ps_get_opcode_info(opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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/* Unknown opcode */
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return_ACPI_STATUS(AE_TYPE);
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}
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/* Perform per-object initialization */
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switch (obj_desc->common.type) {
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case ACPI_TYPE_BUFFER:
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/*
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* Defer evaluation of Buffer term_arg operand
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*/
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obj_desc->buffer.node =
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ACPI_CAST_PTR(struct acpi_namespace_node,
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walk_state->operands[0]);
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obj_desc->buffer.aml_start = op->named.data;
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obj_desc->buffer.aml_length = op->named.length;
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break;
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case ACPI_TYPE_PACKAGE:
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/*
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* Defer evaluation of Package term_arg operand and all
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* package elements. (01/2017): We defer the element
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* resolution to allow forward references from the package
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* in order to provide compatibility with other ACPI
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* implementations.
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*/
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obj_desc->package.node =
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ACPI_CAST_PTR(struct acpi_namespace_node,
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walk_state->operands[0]);
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if (!op->named.data) {
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return_ACPI_STATUS(AE_OK);
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}
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obj_desc->package.aml_start = op->named.data;
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obj_desc->package.aml_length = op->named.length;
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break;
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case ACPI_TYPE_INTEGER:
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switch (op_info->type) {
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case AML_TYPE_CONSTANT:
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/*
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* Resolve AML Constants here - AND ONLY HERE!
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* All constants are integers.
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* We mark the integer with a flag that indicates that it started
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* life as a constant -- so that stores to constants will perform
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* as expected (noop). zero_op is used as a placeholder for optional
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* target operands.
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*/
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obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
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switch (opcode) {
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case AML_ZERO_OP:
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obj_desc->integer.value = 0;
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break;
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case AML_ONE_OP:
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obj_desc->integer.value = 1;
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break;
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case AML_ONES_OP:
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obj_desc->integer.value = ACPI_UINT64_MAX;
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/* Truncate value if we are executing from a 32-bit ACPI table */
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(void)acpi_ex_truncate_for32bit_table(obj_desc);
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break;
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case AML_REVISION_OP:
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obj_desc->integer.value = ACPI_CA_VERSION;
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unknown constant opcode 0x%X",
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opcode));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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break;
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case AML_TYPE_LITERAL:
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obj_desc->integer.value = op->common.value.integer;
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if (acpi_ex_truncate_for32bit_table(obj_desc)) {
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/* Warn if we found a 64-bit constant in a 32-bit table */
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ACPI_WARNING((AE_INFO,
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"Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X",
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ACPI_FORMAT_UINT64(op->common.
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value.integer),
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(u32)obj_desc->integer.value));
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}
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X",
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op_info->type));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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break;
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case ACPI_TYPE_STRING:
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obj_desc->string.pointer = op->common.value.string;
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obj_desc->string.length = (u32)strlen(op->common.value.string);
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/*
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* The string is contained in the ACPI table, don't ever try
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* to delete it
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*/
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obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
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break;
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case ACPI_TYPE_METHOD:
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break;
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case ACPI_TYPE_LOCAL_REFERENCE:
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switch (op_info->type) {
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case AML_TYPE_LOCAL_VARIABLE:
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/* Local ID (0-7) is (AML opcode - base AML_FIRST_LOCAL_OP) */
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obj_desc->reference.value =
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((u32)opcode) - AML_FIRST_LOCAL_OP;
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obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
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status =
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acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
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obj_desc->reference.
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value, walk_state,
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ACPI_CAST_INDIRECT_PTR
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(struct
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acpi_namespace_node,
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&obj_desc->reference.
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object));
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break;
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case AML_TYPE_METHOD_ARGUMENT:
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/* Arg ID (0-6) is (AML opcode - base AML_FIRST_ARG_OP) */
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obj_desc->reference.value =
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((u32)opcode) - AML_FIRST_ARG_OP;
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obj_desc->reference.class = ACPI_REFCLASS_ARG;
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status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
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obj_desc->
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reference.value,
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walk_state,
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ACPI_CAST_INDIRECT_PTR
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(struct
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acpi_namespace_node,
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&obj_desc->
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reference.
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object));
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break;
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default: /* Object name or Debug object */
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switch (op->common.aml_opcode) {
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case AML_INT_NAMEPATH_OP:
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/* Node was saved in Op */
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obj_desc->reference.node = op->common.node;
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obj_desc->reference.class = ACPI_REFCLASS_NAME;
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if (op->common.node) {
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obj_desc->reference.object =
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op->common.node->object;
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}
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break;
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case AML_DEBUG_OP:
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obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unimplemented reference type for AML opcode: 0x%4.4X",
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opcode));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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break;
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}
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X",
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obj_desc->common.type));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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|
|
|
return_ACPI_STATUS(status);
|
|
}
|