summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/dsobject.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--drivers/acpi/acpica/dsobject.c556
1 files changed, 556 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/dsobject.c b/drivers/acpi/acpica/dsobject.c
new file mode 100644
index 000000000..6992c8d5a
--- /dev/null
+++ b/drivers/acpi/acpica/dsobject.c
@@ -0,0 +1,556 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: dsobject - Dispatcher object management routines
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acparser.h"
+#include "amlcode.h"
+#include "acdispat.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+
+#define _COMPONENT ACPI_DISPATCHER
+ACPI_MODULE_NAME("dsobject")
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_build_internal_object
+ *
+ * PARAMETERS: walk_state - Current walk state
+ * op - Parser object to be translated
+ * obj_desc_ptr - Where the ACPI internal object is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
+ * Simple objects are any objects other than a package object!
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
+ union acpi_parse_object *op,
+ union acpi_operand_object **obj_desc_ptr)
+{
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(ds_build_internal_object);
+
+ *obj_desc_ptr = NULL;
+ if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
+ /*
+ * This is a named object reference. If this name was
+ * previously looked up in the namespace, it was stored in
+ * this op. Otherwise, go ahead and look it up now
+ */
+ if (!op->common.node) {
+
+ /* Check if we are resolving a named reference within a package */
+
+ if ((op->common.parent->common.aml_opcode ==
+ AML_PACKAGE_OP)
+ || (op->common.parent->common.aml_opcode ==
+ AML_VARIABLE_PACKAGE_OP)) {
+ /*
+ * We won't resolve package elements here, we will do this
+ * after all ACPI tables are loaded into the namespace. This
+ * behavior supports both forward references to named objects
+ * and external references to objects in other tables.
+ */
+ goto create_new_object;
+ } else {
+ status = acpi_ns_lookup(walk_state->scope_info,
+ op->common.value.string,
+ ACPI_TYPE_ANY,
+ ACPI_IMODE_EXECUTE,
+ ACPI_NS_SEARCH_PARENT |
+ ACPI_NS_DONT_OPEN_SCOPE,
+ NULL,
+ ACPI_CAST_INDIRECT_PTR
+ (struct
+ acpi_namespace_node,
+ &(op->common.node)));
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR_NAMESPACE(walk_state->
+ scope_info,
+ op->common.value.
+ string, status);
+ return_ACPI_STATUS(status);
+ }
+ }
+ }
+ }
+
+create_new_object:
+
+ /* Create and init a new internal ACPI object */
+
+ obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
+ (op->common.aml_opcode))->
+ object_type);
+ if (!obj_desc) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ status =
+ acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
+ &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Handling for unresolved package reference elements.
+ * These are elements that are namepaths.
+ */
+ if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
+ (op->common.parent->common.aml_opcode == AML_VARIABLE_PACKAGE_OP)) {
+ obj_desc->reference.resolved = TRUE;
+
+ if ((op->common.aml_opcode == AML_INT_NAMEPATH_OP) &&
+ !obj_desc->reference.node) {
+ /*
+ * Name was unresolved above.
+ * Get the prefix node for later lookup
+ */
+ obj_desc->reference.node =
+ walk_state->scope_info->scope.node;
+ obj_desc->reference.aml = op->common.aml;
+ obj_desc->reference.resolved = FALSE;
+ }
+ }
+
+ *obj_desc_ptr = obj_desc;
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_build_internal_buffer_obj
+ *
+ * PARAMETERS: walk_state - Current walk state
+ * op - Parser object to be translated
+ * buffer_length - Length of the buffer
+ * obj_desc_ptr - Where the ACPI internal object is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Translate a parser Op package object to the equivalent
+ * namespace object
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
+ union acpi_parse_object *op,
+ u32 buffer_length,
+ union acpi_operand_object **obj_desc_ptr)
+{
+ union acpi_parse_object *arg;
+ union acpi_operand_object *obj_desc;
+ union acpi_parse_object *byte_list;
+ u32 byte_list_length = 0;
+
+ ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
+
+ /*
+ * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
+ * The buffer object already exists (from the NS node), otherwise it must
+ * be created.
+ */
+ obj_desc = *obj_desc_ptr;
+ if (!obj_desc) {
+
+ /* Create a new buffer object */
+
+ obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
+ *obj_desc_ptr = obj_desc;
+ if (!obj_desc) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+ }
+
+ /*
+ * Second arg is the buffer data (optional) byte_list can be either
+ * individual bytes or a string initializer. In either case, a
+ * byte_list appears in the AML.
+ */
+ arg = op->common.value.arg; /* skip first arg */
+
+ byte_list = arg->named.next;
+ if (byte_list) {
+ if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
+ ACPI_ERROR((AE_INFO,
+ "Expecting bytelist, found AML opcode 0x%X in op %p",
+ byte_list->common.aml_opcode, byte_list));
+
+ acpi_ut_remove_reference(obj_desc);
+ return (AE_TYPE);
+ }
+
+ byte_list_length = (u32) byte_list->common.value.integer;
+ }
+
+ /*
+ * The buffer length (number of bytes) will be the larger of:
+ * 1) The specified buffer length and
+ * 2) The length of the initializer byte list
+ */
+ obj_desc->buffer.length = buffer_length;
+ if (byte_list_length > buffer_length) {
+ obj_desc->buffer.length = byte_list_length;
+ }
+
+ /* Allocate the buffer */
+
+ if (obj_desc->buffer.length == 0) {
+ obj_desc->buffer.pointer = NULL;
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Buffer defined with zero length in AML, creating\n"));
+ } else {
+ obj_desc->buffer.pointer =
+ ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
+ if (!obj_desc->buffer.pointer) {
+ acpi_ut_delete_object_desc(obj_desc);
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ /* Initialize buffer from the byte_list (if present) */
+
+ if (byte_list) {
+ memcpy(obj_desc->buffer.pointer, byte_list->named.data,
+ byte_list_length);
+ }
+ }
+
+ obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
+ op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
+ return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_create_node
+ *
+ * PARAMETERS: walk_state - Current walk state
+ * node - NS Node to be initialized
+ * op - Parser object to be translated
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create the object to be associated with a namespace node
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_create_node(struct acpi_walk_state *walk_state,
+ struct acpi_namespace_node *node,
+ union acpi_parse_object *op)
+{
+ acpi_status status;
+ union acpi_operand_object *obj_desc;
+
+ ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
+
+ /*
+ * Because of the execution pass through the non-control-method
+ * parts of the table, we can arrive here twice. Only init
+ * the named object node the first time through
+ */
+ if (acpi_ns_get_attached_object(node)) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ if (!op->common.value.arg) {
+
+ /* No arguments, there is nothing to do */
+
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /* Build an internal object for the argument(s) */
+
+ status =
+ acpi_ds_build_internal_object(walk_state, op->common.value.arg,
+ &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Re-type the object according to its argument */
+
+ node->type = obj_desc->common.type;
+
+ /* Attach obj to node */
+
+ status = acpi_ns_attach_object(node, obj_desc, node->type);
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
+
+#endif /* ACPI_NO_METHOD_EXECUTION */
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_init_object_from_op
+ *
+ * PARAMETERS: walk_state - Current walk state
+ * op - Parser op used to init the internal object
+ * opcode - AML opcode associated with the object
+ * ret_obj_desc - Namespace object to be initialized
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Initialize a namespace object from a parser Op and its
+ * associated arguments. The namespace object is a more compact
+ * representation of the Op and its arguments.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
+ union acpi_parse_object *op,
+ u16 opcode,
+ union acpi_operand_object **ret_obj_desc)
+{
+ const struct acpi_opcode_info *op_info;
+ union acpi_operand_object *obj_desc;
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE(ds_init_object_from_op);
+
+ obj_desc = *ret_obj_desc;
+ op_info = acpi_ps_get_opcode_info(opcode);
+ if (op_info->class == AML_CLASS_UNKNOWN) {
+
+ /* Unknown opcode */
+
+ return_ACPI_STATUS(AE_TYPE);
+ }
+
+ /* Perform per-object initialization */
+
+ switch (obj_desc->common.type) {
+ case ACPI_TYPE_BUFFER:
+ /*
+ * Defer evaluation of Buffer term_arg operand
+ */
+ obj_desc->buffer.node =
+ ACPI_CAST_PTR(struct acpi_namespace_node,
+ walk_state->operands[0]);
+ obj_desc->buffer.aml_start = op->named.data;
+ obj_desc->buffer.aml_length = op->named.length;
+ break;
+
+ case ACPI_TYPE_PACKAGE:
+ /*
+ * Defer evaluation of Package term_arg operand and all
+ * package elements. (01/2017): We defer the element
+ * resolution to allow forward references from the package
+ * in order to provide compatibility with other ACPI
+ * implementations.
+ */
+ obj_desc->package.node =
+ ACPI_CAST_PTR(struct acpi_namespace_node,
+ walk_state->operands[0]);
+
+ if (!op->named.data) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ obj_desc->package.aml_start = op->named.data;
+ obj_desc->package.aml_length = op->named.length;
+ break;
+
+ case ACPI_TYPE_INTEGER:
+
+ switch (op_info->type) {
+ case AML_TYPE_CONSTANT:
+ /*
+ * Resolve AML Constants here - AND ONLY HERE!
+ * All constants are integers.
+ * We mark the integer with a flag that indicates that it started
+ * life as a constant -- so that stores to constants will perform
+ * as expected (noop). zero_op is used as a placeholder for optional
+ * target operands.
+ */
+ obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
+
+ switch (opcode) {
+ case AML_ZERO_OP:
+
+ obj_desc->integer.value = 0;
+ break;
+
+ case AML_ONE_OP:
+
+ obj_desc->integer.value = 1;
+ break;
+
+ case AML_ONES_OP:
+
+ obj_desc->integer.value = ACPI_UINT64_MAX;
+
+ /* Truncate value if we are executing from a 32-bit ACPI table */
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+ (void)acpi_ex_truncate_for32bit_table(obj_desc);
+#endif
+ break;
+
+ case AML_REVISION_OP:
+
+ obj_desc->integer.value = ACPI_CA_VERSION;
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO,
+ "Unknown constant opcode 0x%X",
+ opcode));
+ status = AE_AML_OPERAND_TYPE;
+ break;
+ }
+ break;
+
+ case AML_TYPE_LITERAL:
+
+ obj_desc->integer.value = op->common.value.integer;
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+ if (acpi_ex_truncate_for32bit_table(obj_desc)) {
+
+ /* Warn if we found a 64-bit constant in a 32-bit table */
+
+ ACPI_WARNING((AE_INFO,
+ "Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X",
+ ACPI_FORMAT_UINT64(op->common.
+ value.integer),
+ (u32)obj_desc->integer.value));
+ }
+#endif
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X",
+ op_info->type));
+ status = AE_AML_OPERAND_TYPE;
+ break;
+ }
+ break;
+
+ case ACPI_TYPE_STRING:
+
+ obj_desc->string.pointer = op->common.value.string;
+ obj_desc->string.length = (u32)strlen(op->common.value.string);
+
+ /*
+ * The string is contained in the ACPI table, don't ever try
+ * to delete it
+ */
+ obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
+ break;
+
+ case ACPI_TYPE_METHOD:
+ break;
+
+ case ACPI_TYPE_LOCAL_REFERENCE:
+
+ switch (op_info->type) {
+ case AML_TYPE_LOCAL_VARIABLE:
+
+ /* Local ID (0-7) is (AML opcode - base AML_FIRST_LOCAL_OP) */
+
+ obj_desc->reference.value =
+ ((u32)opcode) - AML_FIRST_LOCAL_OP;
+ obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+ status =
+ acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
+ obj_desc->reference.
+ value, walk_state,
+ ACPI_CAST_INDIRECT_PTR
+ (struct
+ acpi_namespace_node,
+ &obj_desc->reference.
+ object));
+#endif
+ break;
+
+ case AML_TYPE_METHOD_ARGUMENT:
+
+ /* Arg ID (0-6) is (AML opcode - base AML_FIRST_ARG_OP) */
+
+ obj_desc->reference.value =
+ ((u32)opcode) - AML_FIRST_ARG_OP;
+ obj_desc->reference.class = ACPI_REFCLASS_ARG;
+
+#ifndef ACPI_NO_METHOD_EXECUTION
+ status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
+ obj_desc->
+ reference.value,
+ walk_state,
+ ACPI_CAST_INDIRECT_PTR
+ (struct
+ acpi_namespace_node,
+ &obj_desc->
+ reference.
+ object));
+#endif
+ break;
+
+ default: /* Object name or Debug object */
+
+ switch (op->common.aml_opcode) {
+ case AML_INT_NAMEPATH_OP:
+
+ /* Node was saved in Op */
+
+ obj_desc->reference.node = op->common.node;
+ obj_desc->reference.class = ACPI_REFCLASS_NAME;
+ if (op->common.node) {
+ obj_desc->reference.object =
+ op->common.node->object;
+ }
+ break;
+
+ case AML_DEBUG_OP:
+
+ obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO,
+ "Unimplemented reference type for AML opcode: 0x%4.4X",
+ opcode));
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+ break;
+ }
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X",
+ obj_desc->common.type));
+
+ status = AE_AML_OPERAND_TYPE;
+ break;
+ }
+
+ return_ACPI_STATUS(status);
+}