diff options
Diffstat (limited to 'drivers/acpi/acpica/excreate.c')
| -rw-r--r-- | drivers/acpi/acpica/excreate.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/excreate.c b/drivers/acpi/acpica/excreate.c new file mode 100644 index 0000000000..1bea9d9765 --- /dev/null +++ b/drivers/acpi/acpica/excreate.c @@ -0,0 +1,470 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/****************************************************************************** + * + * Module Name: excreate - Named object creation + * + * Copyright (C) 2000 - 2023, Intel Corp. + * + *****************************************************************************/ + +#include <acpi/acpi.h> +#include "accommon.h" +#include "acinterp.h" +#include "amlcode.h" +#include "acnamesp.h" + +#define _COMPONENT ACPI_EXECUTER +ACPI_MODULE_NAME("excreate") +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_alias + * + * PARAMETERS: walk_state - Current state, contains operands + * + * RETURN: Status + * + * DESCRIPTION: Create a new named alias + * + ******************************************************************************/ +acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state) +{ + struct acpi_namespace_node *target_node; + struct acpi_namespace_node *alias_node; + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ex_create_alias); + + /* Get the source/alias operands (both namespace nodes) */ + + alias_node = (struct acpi_namespace_node *)walk_state->operands[0]; + target_node = (struct acpi_namespace_node *)walk_state->operands[1]; + + if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) || + (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) { + /* + * Dereference an existing alias so that we don't create a chain + * of aliases. With this code, we guarantee that an alias is + * always exactly one level of indirection away from the + * actual aliased name. + */ + target_node = + ACPI_CAST_PTR(struct acpi_namespace_node, + target_node->object); + } + + /* Ensure that the target node is valid */ + + if (!target_node) { + return_ACPI_STATUS(AE_NULL_OBJECT); + } + + /* Construct the alias object (a namespace node) */ + + switch (target_node->type) { + case ACPI_TYPE_METHOD: + /* + * Control method aliases need to be differentiated with + * a special type + */ + alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS; + break; + + default: + /* + * All other object types. + * + * The new alias has the type ALIAS and points to the original + * NS node, not the object itself. + */ + alias_node->type = ACPI_TYPE_LOCAL_ALIAS; + alias_node->object = + ACPI_CAST_PTR(union acpi_operand_object, target_node); + break; + } + + /* Since both operands are Nodes, we don't need to delete them */ + + alias_node->object = + ACPI_CAST_PTR(union acpi_operand_object, target_node); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_event + * + * PARAMETERS: walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Create a new event object + * + ******************************************************************************/ + +acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_TRACE(ex_create_event); + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* + * Create the actual OS semaphore, with zero initial units -- meaning + * that the event is created in an unsignalled state + */ + status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, + &obj_desc->event.os_semaphore); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* Attach object to the Node */ + + status = acpi_ns_attach_object((struct acpi_namespace_node *) + walk_state->operands[0], obj_desc, + ACPI_TYPE_EVENT); + +cleanup: + /* + * Remove local reference to the object (on error, will cause deletion + * of both object and semaphore if present.) + */ + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_mutex + * + * PARAMETERS: walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Create a new mutex object + * + * Mutex (Name[0], sync_level[1]) + * + ******************************************************************************/ + +acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS); + + /* Create the new mutex object */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Create the actual OS Mutex */ + + status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* Init object and attach to NS node */ + + obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value; + obj_desc->mutex.node = + (struct acpi_namespace_node *)walk_state->operands[0]; + + status = + acpi_ns_attach_object(obj_desc->mutex.node, obj_desc, + ACPI_TYPE_MUTEX); + +cleanup: + /* + * Remove local reference to the object (on error, will cause deletion + * of both object and semaphore if present.) + */ + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_region + * + * PARAMETERS: aml_start - Pointer to the region declaration AML + * aml_length - Max length of the declaration AML + * space_id - Address space ID for the region + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Create a new operation region object + * + ******************************************************************************/ + +acpi_status +acpi_ex_create_region(u8 * aml_start, + u32 aml_length, + u8 space_id, struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + struct acpi_namespace_node *node; + union acpi_operand_object *region_obj2; + + ACPI_FUNCTION_TRACE(ex_create_region); + + /* Get the Namespace Node */ + + node = walk_state->op->common.node; + + /* + * If the region object is already attached to this node, + * just return + */ + if (acpi_ns_get_attached_object(node)) { + return_ACPI_STATUS(AE_OK); + } + + /* + * Space ID must be one of the predefined IDs, or in the user-defined + * range + */ + if (!acpi_is_valid_space_id(space_id)) { + /* + * Print an error message, but continue. We don't want to abort + * a table load for this exception. Instead, if the region is + * actually used at runtime, abort the executing method. + */ + ACPI_ERROR((AE_INFO, + "Invalid/unknown Address Space ID: 0x%2.2X", + space_id)); + } + + ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n", + acpi_ut_get_region_name(space_id), space_id)); + + /* Create the region descriptor */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* + * Remember location in AML stream of address & length + * operands since they need to be evaluated at run time. + */ + region_obj2 = acpi_ns_get_secondary_object(obj_desc); + region_obj2->extra.aml_start = aml_start; + region_obj2->extra.aml_length = aml_length; + region_obj2->extra.method_REG = NULL; + if (walk_state->scope_info) { + region_obj2->extra.scope_node = + walk_state->scope_info->scope.node; + } else { + region_obj2->extra.scope_node = node; + } + + /* Init the region from the operands */ + + obj_desc->region.space_id = space_id; + obj_desc->region.address = 0; + obj_desc->region.length = 0; + obj_desc->region.pointer = NULL; + obj_desc->region.node = node; + obj_desc->region.handler = NULL; + obj_desc->common.flags &= + ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED | + AOPOBJ_OBJECT_INITIALIZED); + + /* Install the new region object in the parent Node */ + + status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION); + +cleanup: + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_processor + * + * PARAMETERS: walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Create a new processor object and populate the fields + * + * Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3]) + * + ******************************************************************************/ + +acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *obj_desc; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state); + + /* Create the processor object */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR); + if (!obj_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Initialize the processor object from the operands */ + + obj_desc->processor.proc_id = (u8) operand[1]->integer.value; + obj_desc->processor.length = (u8) operand[3]->integer.value; + obj_desc->processor.address = + (acpi_io_address)operand[2]->integer.value; + + /* Install the processor object in the parent Node */ + + status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], + obj_desc, ACPI_TYPE_PROCESSOR); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_power_resource + * + * PARAMETERS: walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Create a new power_resource object and populate the fields + * + * power_resource (Name[0], system_level[1], resource_order[2]) + * + ******************************************************************************/ + +acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + acpi_status status; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state); + + /* Create the power resource object */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER); + if (!obj_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Initialize the power object from the operands */ + + obj_desc->power_resource.system_level = (u8) operand[1]->integer.value; + obj_desc->power_resource.resource_order = + (u16) operand[2]->integer.value; + + /* Install the power resource object in the parent Node */ + + status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], + obj_desc, ACPI_TYPE_POWER); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_create_method + * + * PARAMETERS: aml_start - First byte of the method's AML + * aml_length - AML byte count for this method + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Create a new method object + * + ******************************************************************************/ + +acpi_status +acpi_ex_create_method(u8 * aml_start, + u32 aml_length, struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *obj_desc; + acpi_status status; + u8 method_flags; + + ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state); + + /* Create a new method object */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto exit; + } + + /* Save the method's AML pointer and length */ + + obj_desc->method.aml_start = aml_start; + obj_desc->method.aml_length = aml_length; + obj_desc->method.node = operand[0]; + + /* + * Disassemble the method flags. Split off the arg_count, Serialized + * flag, and sync_level for efficiency. + */ + method_flags = (u8)operand[1]->integer.value; + obj_desc->method.param_count = (u8) + (method_flags & AML_METHOD_ARG_COUNT); + + /* + * Get the sync_level. If method is serialized, a mutex will be + * created for this method when it is parsed. + */ + if (method_flags & AML_METHOD_SERIALIZED) { + obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED; + + /* + * ACPI 1.0: sync_level = 0 + * ACPI 2.0: sync_level = sync_level in method declaration + */ + obj_desc->method.sync_level = (u8) + ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4); + } + + /* Attach the new object to the method Node */ + + status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0], + obj_desc, ACPI_TYPE_METHOD); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + +exit: + /* Remove a reference to the operand */ + + acpi_ut_remove_reference(operand[1]); + return_ACPI_STATUS(status); +} |