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-rw-r--r--include/acpi/acobject.h37
1 files changed, 30 insertions, 7 deletions
diff --git a/include/acpi/acobject.h b/include/acpi/acobject.h
index e9657dac69b7..eb6f038b03d9 100644
--- a/include/acpi/acobject.h
+++ b/include/acpi/acobject.h
@@ -308,18 +308,34 @@ struct acpi_object_addr_handler {
*****************************************************************************/
/*
- * The Reference object type is used for these opcodes:
- * Arg[0-6], Local[0-7], index_op, name_op, zero_op, one_op, ones_op, debug_op
+ * The Reference object is used for these opcodes:
+ * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
+ * The Reference.Class differentiates these types.
*/
struct acpi_object_reference {
- ACPI_OBJECT_COMMON_HEADER u8 target_type; /* Used for index_op */
- u16 opcode;
+ ACPI_OBJECT_COMMON_HEADER u8 class; /* Reference Class */
+ u8 target_type; /* Used for Index Op */
+ u8 reserved;
void *object; /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
- struct acpi_namespace_node *node;
- union acpi_operand_object **where;
- u32 offset; /* Used for arg_op, local_op, and index_op */
+ struct acpi_namespace_node *node; /* ref_of or Namepath */
+ union acpi_operand_object **where; /* Target of Index */
+ u32 value; /* Used for Local/Arg/Index/ddb_handle */
};
+/* Values for Reference.Class above */
+
+typedef enum {
+ ACPI_REFCLASS_LOCAL = 0, /* Method local */
+ ACPI_REFCLASS_ARG = 1, /* Method argument */
+ ACPI_REFCLASS_REFOF = 2, /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
+ ACPI_REFCLASS_INDEX = 3, /* Result of Index() */
+ ACPI_REFCLASS_TABLE = 4, /* ddb_handle - Load(), load_table() */
+ ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
+ ACPI_REFCLASS_DEBUG = 6, /* Debug object */
+
+ ACPI_REFCLASS_MAX = 6
+} ACPI_REFERENCE_CLASSES;
+
/*
* Extra object is used as additional storage for types that
* have AML code in their declarations (term_args) that must be
@@ -379,6 +395,13 @@ union acpi_operand_object {
struct acpi_object_extra extra;
struct acpi_object_data data;
struct acpi_object_cache_list cache;
+
+ /*
+ * Add namespace node to union in order to simplify code that accepts both
+ * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
+ * a common descriptor_type field in order to differentiate them.
+ */
+ struct acpi_namespace_node node;
};
/******************************************************************************