X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Facpi%2Facpica%2Fexresop.c;fp=kernel%2Fdrivers%2Facpi%2Facpica%2Fexresop.c;h=d2964af9ad4df52e9846c02a7e129e7d0f8c0ea2;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git

diff --git a/kernel/drivers/acpi/acpica/exresop.c b/kernel/drivers/acpi/acpica/exresop.c
new file mode 100644
index 000000000..d2964af9a
--- /dev/null
+++ b/kernel/drivers/acpi/acpica/exresop.c
@@ -0,0 +1,701 @@
+/******************************************************************************
+ *
+ * Module Name: exresop - AML Interpreter operand/object resolution
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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 "accommon.h"
+#include "amlcode.h"
+#include "acparser.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exresop")
+
+/* Local prototypes */
+static acpi_status
+acpi_ex_check_object_type(acpi_object_type type_needed,
+			  acpi_object_type this_type, void *object);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_check_object_type
+ *
+ * PARAMETERS:  type_needed         Object type needed
+ *              this_type           Actual object type
+ *              Object              Object pointer
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check required type against actual type
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ex_check_object_type(acpi_object_type type_needed,
+			  acpi_object_type this_type, void *object)
+{
+	ACPI_FUNCTION_ENTRY();
+
+	if (type_needed == ACPI_TYPE_ANY) {
+
+		/* All types OK, so we don't perform any typechecks */
+
+		return (AE_OK);
+	}
+
+	if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
+		/*
+		 * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
+		 * objects and thus allow them to be targets. (As per the ACPI
+		 * specification, a store to a constant is a noop.)
+		 */
+		if ((this_type == ACPI_TYPE_INTEGER) &&
+		    (((union acpi_operand_object *)object)->common.
+		     flags & AOPOBJ_AML_CONSTANT)) {
+			return (AE_OK);
+		}
+	}
+
+	if (type_needed != this_type) {
+		ACPI_ERROR((AE_INFO,
+			    "Needed type [%s], found [%s] %p",
+			    acpi_ut_get_type_name(type_needed),
+			    acpi_ut_get_type_name(this_type), object));
+
+		return (AE_AML_OPERAND_TYPE);
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_resolve_operands
+ *
+ * PARAMETERS:  opcode              - Opcode being interpreted
+ *              stack_ptr           - Pointer to the operand stack to be
+ *                                    resolved
+ *              walk_state          - Current state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert multiple input operands to the types required by the
+ *              target operator.
+ *
+ *      Each 5-bit group in arg_types represents one required
+ *      operand and indicates the required Type. The corresponding operand
+ *      will be converted to the required type if possible, otherwise we
+ *      abort with an exception.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_resolve_operands(u16 opcode,
+			 union acpi_operand_object ** stack_ptr,
+			 struct acpi_walk_state * walk_state)
+{
+	union acpi_operand_object *obj_desc;
+	acpi_status status = AE_OK;
+	u8 object_type;
+	u32 arg_types;
+	const struct acpi_opcode_info *op_info;
+	u32 this_arg_type;
+	acpi_object_type type_needed;
+	u16 target_op = 0;
+
+	ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode);
+
+	op_info = acpi_ps_get_opcode_info(opcode);
+	if (op_info->class == AML_CLASS_UNKNOWN) {
+		return_ACPI_STATUS(AE_AML_BAD_OPCODE);
+	}
+
+	arg_types = op_info->runtime_args;
+	if (arg_types == ARGI_INVALID_OPCODE) {
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode));
+
+		return_ACPI_STATUS(AE_AML_INTERNAL);
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+			  "Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
+			  opcode, op_info->name, arg_types));
+
+	/*
+	 * Normal exit is with (arg_types == 0) at end of argument list.
+	 * Function will return an exception from within the loop upon
+	 * finding an entry which is not (or cannot be converted
+	 * to) the required type; if stack underflows; or upon
+	 * finding a NULL stack entry (which should not happen).
+	 */
+	while (GET_CURRENT_ARG_TYPE(arg_types)) {
+		if (!stack_ptr || !*stack_ptr) {
+			ACPI_ERROR((AE_INFO, "Null stack entry at %p",
+				    stack_ptr));
+
+			return_ACPI_STATUS(AE_AML_INTERNAL);
+		}
+
+		/* Extract useful items */
+
+		obj_desc = *stack_ptr;
+
+		/* Decode the descriptor type */
+
+		switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
+		case ACPI_DESC_TYPE_NAMED:
+
+			/* Namespace Node */
+
+			object_type =
+			    ((struct acpi_namespace_node *)obj_desc)->type;
+
+			/*
+			 * Resolve an alias object. The construction of these objects
+			 * guarantees that there is only one level of alias indirection;
+			 * thus, the attached object is always the aliased namespace node
+			 */
+			if (object_type == ACPI_TYPE_LOCAL_ALIAS) {
+				obj_desc =
+				    acpi_ns_get_attached_object((struct
+								 acpi_namespace_node
+								 *)obj_desc);
+				*stack_ptr = obj_desc;
+				object_type =
+				    ((struct acpi_namespace_node *)obj_desc)->
+				    type;
+			}
+			break;
+
+		case ACPI_DESC_TYPE_OPERAND:
+
+			/* ACPI internal object */
+
+			object_type = obj_desc->common.type;
+
+			/* Check for bad acpi_object_type */
+
+			if (!acpi_ut_valid_object_type(object_type)) {
+				ACPI_ERROR((AE_INFO,
+					    "Bad operand object type [0x%X]",
+					    object_type));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+
+			if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
+
+				/* Validate the Reference */
+
+				switch (obj_desc->reference.class) {
+				case ACPI_REFCLASS_DEBUG:
+
+					target_op = AML_DEBUG_OP;
+
+					/*lint -fallthrough */
+
+				case ACPI_REFCLASS_ARG:
+				case ACPI_REFCLASS_LOCAL:
+				case ACPI_REFCLASS_INDEX:
+				case ACPI_REFCLASS_REFOF:
+				case ACPI_REFCLASS_TABLE:	/* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
+				case ACPI_REFCLASS_NAME:	/* Reference to a named object */
+
+					ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+							  "Operand is a Reference, Class [%s] %2.2X\n",
+							  acpi_ut_get_reference_name
+							  (obj_desc),
+							  obj_desc->reference.
+							  class));
+					break;
+
+				default:
+
+					ACPI_ERROR((AE_INFO,
+						    "Unknown Reference Class 0x%2.2X in %p",
+						    obj_desc->reference.class,
+						    obj_desc));
+
+					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+				}
+			}
+			break;
+
+		default:
+
+			/* Invalid descriptor */
+
+			ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]",
+				    obj_desc,
+				    acpi_ut_get_descriptor_name(obj_desc)));
+
+			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+		}
+
+		/* Get one argument type, point to the next */
+
+		this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
+		INCREMENT_ARG_LIST(arg_types);
+
+		/*
+		 * Handle cases where the object does not need to be
+		 * resolved to a value
+		 */
+		switch (this_arg_type) {
+		case ARGI_REF_OR_STRING:	/* Can be a String or Reference */
+
+			if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
+			     ACPI_DESC_TYPE_OPERAND)
+			    && (obj_desc->common.type == ACPI_TYPE_STRING)) {
+				/*
+				 * String found - the string references a named object and
+				 * must be resolved to a node
+				 */
+				goto next_operand;
+			}
+
+			/*
+			 * Else not a string - fall through to the normal Reference
+			 * case below
+			 */
+			/*lint -fallthrough */
+
+		case ARGI_REFERENCE:	/* References: */
+		case ARGI_INTEGER_REF:
+		case ARGI_OBJECT_REF:
+		case ARGI_DEVICE_REF:
+		case ARGI_TARGETREF:	/* Allows implicit conversion rules before store */
+		case ARGI_FIXED_TARGET:	/* No implicit conversion before store to target */
+		case ARGI_SIMPLE_TARGET:	/* Name, Local, or arg - no implicit conversion  */
+			/*
+			 * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
+			 * A Namespace Node is OK as-is
+			 */
+			if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
+			    ACPI_DESC_TYPE_NAMED) {
+				goto next_operand;
+			}
+
+			status =
+			    acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
+						      object_type, obj_desc);
+			if (ACPI_FAILURE(status)) {
+				return_ACPI_STATUS(status);
+			}
+			goto next_operand;
+
+		case ARGI_DATAREFOBJ:	/* Store operator only */
+			/*
+			 * We don't want to resolve index_op reference objects during
+			 * a store because this would be an implicit de_ref_of operation.
+			 * Instead, we just want to store the reference object.
+			 * -- All others must be resolved below.
+			 */
+			if ((opcode == AML_STORE_OP) &&
+			    ((*stack_ptr)->common.type ==
+			     ACPI_TYPE_LOCAL_REFERENCE)
+			    && ((*stack_ptr)->reference.class ==
+				ACPI_REFCLASS_INDEX)) {
+				goto next_operand;
+			}
+			break;
+
+		default:
+
+			/* All cases covered above */
+
+			break;
+		}
+
+		/*
+		 * Resolve this object to a value
+		 */
+		status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+
+		/* Get the resolved object */
+
+		obj_desc = *stack_ptr;
+
+		/*
+		 * Check the resulting object (value) type
+		 */
+		switch (this_arg_type) {
+			/*
+			 * For the simple cases, only one type of resolved object
+			 * is allowed
+			 */
+		case ARGI_MUTEX:
+
+			/* Need an operand of type ACPI_TYPE_MUTEX */
+
+			type_needed = ACPI_TYPE_MUTEX;
+			break;
+
+		case ARGI_EVENT:
+
+			/* Need an operand of type ACPI_TYPE_EVENT */
+
+			type_needed = ACPI_TYPE_EVENT;
+			break;
+
+		case ARGI_PACKAGE:	/* Package */
+
+			/* Need an operand of type ACPI_TYPE_PACKAGE */
+
+			type_needed = ACPI_TYPE_PACKAGE;
+			break;
+
+		case ARGI_ANYTYPE:
+
+			/* Any operand type will do */
+
+			type_needed = ACPI_TYPE_ANY;
+			break;
+
+		case ARGI_DDBHANDLE:
+
+			/* Need an operand of type ACPI_TYPE_DDB_HANDLE */
+
+			type_needed = ACPI_TYPE_LOCAL_REFERENCE;
+			break;
+
+			/*
+			 * The more complex cases allow multiple resolved object types
+			 */
+		case ARGI_INTEGER:
+
+			/*
+			 * Need an operand of type ACPI_TYPE_INTEGER,
+			 * But we can implicitly convert from a STRING or BUFFER
+			 * aka - "Implicit Source Operand Conversion"
+			 */
+			status =
+			    acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
+			if (ACPI_FAILURE(status)) {
+				if (status == AE_TYPE) {
+					ACPI_ERROR((AE_INFO,
+						    "Needed [Integer/String/Buffer], found [%s] %p",
+						    acpi_ut_get_object_type_name
+						    (obj_desc), obj_desc));
+
+					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+				}
+
+				return_ACPI_STATUS(status);
+			}
+
+			if (obj_desc != *stack_ptr) {
+				acpi_ut_remove_reference(obj_desc);
+			}
+			goto next_operand;
+
+		case ARGI_BUFFER:
+			/*
+			 * Need an operand of type ACPI_TYPE_BUFFER,
+			 * But we can implicitly convert from a STRING or INTEGER
+			 * aka - "Implicit Source Operand Conversion"
+			 */
+			status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
+			if (ACPI_FAILURE(status)) {
+				if (status == AE_TYPE) {
+					ACPI_ERROR((AE_INFO,
+						    "Needed [Integer/String/Buffer], found [%s] %p",
+						    acpi_ut_get_object_type_name
+						    (obj_desc), obj_desc));
+
+					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+				}
+
+				return_ACPI_STATUS(status);
+			}
+
+			if (obj_desc != *stack_ptr) {
+				acpi_ut_remove_reference(obj_desc);
+			}
+			goto next_operand;
+
+		case ARGI_STRING:
+			/*
+			 * Need an operand of type ACPI_TYPE_STRING,
+			 * But we can implicitly convert from a BUFFER or INTEGER
+			 * aka - "Implicit Source Operand Conversion"
+			 */
+			status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
+							   ACPI_IMPLICIT_CONVERT_HEX);
+			if (ACPI_FAILURE(status)) {
+				if (status == AE_TYPE) {
+					ACPI_ERROR((AE_INFO,
+						    "Needed [Integer/String/Buffer], found [%s] %p",
+						    acpi_ut_get_object_type_name
+						    (obj_desc), obj_desc));
+
+					return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+				}
+
+				return_ACPI_STATUS(status);
+			}
+
+			if (obj_desc != *stack_ptr) {
+				acpi_ut_remove_reference(obj_desc);
+			}
+			goto next_operand;
+
+		case ARGI_COMPUTEDATA:
+
+			/* Need an operand of type INTEGER, STRING or BUFFER */
+
+			switch (obj_desc->common.type) {
+			case ACPI_TYPE_INTEGER:
+			case ACPI_TYPE_STRING:
+			case ACPI_TYPE_BUFFER:
+
+				/* Valid operand */
+				break;
+
+			default:
+				ACPI_ERROR((AE_INFO,
+					    "Needed [Integer/String/Buffer], found [%s] %p",
+					    acpi_ut_get_object_type_name
+					    (obj_desc), obj_desc));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+			goto next_operand;
+
+		case ARGI_BUFFER_OR_STRING:
+
+			/* Need an operand of type STRING or BUFFER */
+
+			switch (obj_desc->common.type) {
+			case ACPI_TYPE_STRING:
+			case ACPI_TYPE_BUFFER:
+
+				/* Valid operand */
+				break;
+
+			case ACPI_TYPE_INTEGER:
+
+				/* Highest priority conversion is to type Buffer */
+
+				status =
+				    acpi_ex_convert_to_buffer(obj_desc,
+							      stack_ptr);
+				if (ACPI_FAILURE(status)) {
+					return_ACPI_STATUS(status);
+				}
+
+				if (obj_desc != *stack_ptr) {
+					acpi_ut_remove_reference(obj_desc);
+				}
+				break;
+
+			default:
+				ACPI_ERROR((AE_INFO,
+					    "Needed [Integer/String/Buffer], found [%s] %p",
+					    acpi_ut_get_object_type_name
+					    (obj_desc), obj_desc));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+			goto next_operand;
+
+		case ARGI_DATAOBJECT:
+			/*
+			 * ARGI_DATAOBJECT is only used by the size_of operator.
+			 * Need a buffer, string, package, or ref_of reference.
+			 *
+			 * The only reference allowed here is a direct reference to
+			 * a namespace node.
+			 */
+			switch (obj_desc->common.type) {
+			case ACPI_TYPE_PACKAGE:
+			case ACPI_TYPE_STRING:
+			case ACPI_TYPE_BUFFER:
+			case ACPI_TYPE_LOCAL_REFERENCE:
+
+				/* Valid operand */
+				break;
+
+			default:
+
+				ACPI_ERROR((AE_INFO,
+					    "Needed [Buffer/String/Package/Reference], found [%s] %p",
+					    acpi_ut_get_object_type_name
+					    (obj_desc), obj_desc));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+			goto next_operand;
+
+		case ARGI_COMPLEXOBJ:
+
+			/* Need a buffer or package or (ACPI 2.0) String */
+
+			switch (obj_desc->common.type) {
+			case ACPI_TYPE_PACKAGE:
+			case ACPI_TYPE_STRING:
+			case ACPI_TYPE_BUFFER:
+
+				/* Valid operand */
+				break;
+
+			default:
+
+				ACPI_ERROR((AE_INFO,
+					    "Needed [Buffer/String/Package], found [%s] %p",
+					    acpi_ut_get_object_type_name
+					    (obj_desc), obj_desc));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+			goto next_operand;
+
+		case ARGI_REGION_OR_BUFFER:	/* Used by Load() only */
+
+			/* Need an operand of type REGION or a BUFFER (which could be a resolved region field) */
+
+			switch (obj_desc->common.type) {
+			case ACPI_TYPE_BUFFER:
+			case ACPI_TYPE_REGION:
+
+				/* Valid operand */
+				break;
+
+			default:
+
+				ACPI_ERROR((AE_INFO,
+					    "Needed [Region/Buffer], found [%s] %p",
+					    acpi_ut_get_object_type_name
+					    (obj_desc), obj_desc));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+			goto next_operand;
+
+		case ARGI_DATAREFOBJ:
+
+			/* Used by the Store() operator only */
+
+			switch (obj_desc->common.type) {
+			case ACPI_TYPE_INTEGER:
+			case ACPI_TYPE_PACKAGE:
+			case ACPI_TYPE_STRING:
+			case ACPI_TYPE_BUFFER:
+			case ACPI_TYPE_BUFFER_FIELD:
+			case ACPI_TYPE_LOCAL_REFERENCE:
+			case ACPI_TYPE_LOCAL_REGION_FIELD:
+			case ACPI_TYPE_LOCAL_BANK_FIELD:
+			case ACPI_TYPE_LOCAL_INDEX_FIELD:
+			case ACPI_TYPE_DDB_HANDLE:
+
+				/* Valid operand */
+				break;
+
+			default:
+
+				if (acpi_gbl_enable_interpreter_slack) {
+					/*
+					 * Enable original behavior of Store(), allowing any and all
+					 * objects as the source operand. The ACPI spec does not
+					 * allow this, however.
+					 */
+					break;
+				}
+
+				if (target_op == AML_DEBUG_OP) {
+
+					/* Allow store of any object to the Debug object */
+
+					break;
+				}
+
+				ACPI_ERROR((AE_INFO,
+					    "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p",
+					    acpi_ut_get_object_type_name
+					    (obj_desc), obj_desc));
+
+				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+			}
+			goto next_operand;
+
+		default:
+
+			/* Unknown type */
+
+			ACPI_ERROR((AE_INFO,
+				    "Internal - Unknown ARGI (required operand) type 0x%X",
+				    this_arg_type));
+
+			return_ACPI_STATUS(AE_BAD_PARAMETER);
+		}
+
+		/*
+		 * Make sure that the original object was resolved to the
+		 * required object type (Simple cases only).
+		 */
+		status = acpi_ex_check_object_type(type_needed,
+						   (*stack_ptr)->common.type,
+						   *stack_ptr);
+		if (ACPI_FAILURE(status)) {
+			return_ACPI_STATUS(status);
+		}
+
+next_operand:
+		/*
+		 * If more operands needed, decrement stack_ptr to point
+		 * to next operand on stack
+		 */
+		if (GET_CURRENT_ARG_TYPE(arg_types)) {
+			stack_ptr--;
+		}
+	}
+
+	ACPI_DUMP_OPERANDS(walk_state->operands,
+			   acpi_ps_get_opcode_name(opcode),
+			   walk_state->num_operands);
+
+	return_ACPI_STATUS(status);
+}