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linux/drivers/acpi/executer/exresop.c

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/******************************************************************************
*
* Module Name: exresop - AML Interpreter operand/object resolution
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* 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 <acpi/amlcode.h>
#include <acpi/acparser.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exresop")
/*******************************************************************************
*
* 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
*
******************************************************************************/
acpi_status
acpi_ex_check_object_type (
acpi_object_type type_needed,
acpi_object_type this_type,
void *object)
{
ACPI_FUNCTION_NAME ("ex_check_object_type");
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [%s], found [%s] %p\n",
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;
void *temp_node;
u32 arg_types;
const struct acpi_opcode_info *op_info;
u32 this_arg_type;
acpi_object_type type_needed;
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_REPORT_ERROR (("resolve_operands: %X is not a valid AML opcode\n",
opcode));
return_ACPI_STATUS (AE_AML_INTERNAL);
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Opcode %X [%s] required_operand_types=%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_REPORT_ERROR (("resolve_operands: Null stack entry at %p\n",
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:
/* Node */
object_type = ((struct acpi_namespace_node *) obj_desc)->type;
break;
case ACPI_DESC_TYPE_OPERAND:
/* ACPI internal object */
object_type = ACPI_GET_OBJECT_TYPE (obj_desc);
/* Check for bad acpi_object_type */
if (!acpi_ut_valid_object_type (object_type)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad operand object type [%X]\n",
object_type));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
/*
* Decode the Reference
*/
op_info = acpi_ps_get_opcode_info (opcode);
if (op_info->class == AML_CLASS_UNKNOWN) {
return_ACPI_STATUS (AE_AML_BAD_OPCODE);
}
switch (obj_desc->reference.opcode) {
case AML_DEBUG_OP:
case AML_NAME_OP:
case AML_INDEX_OP:
case AML_REF_OF_OP:
case AML_ARG_OP:
case AML_LOCAL_OP:
case AML_LOAD_OP: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
ACPI_DEBUG_ONLY_MEMBERS (ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Operand is a Reference, ref_opcode [%s]\n",
(acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name)));
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Operand is a Reference, Unknown Reference Opcode %X [%s]\n",
obj_desc->reference.opcode,
(acpi_ps_get_opcode_info (obj_desc->reference.opcode))->name));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
}
break;
default:
/* Invalid descriptor */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid descriptor %p [%s]\n",
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) &&
(ACPI_GET_OBJECT_TYPE (obj_desc) == 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 */
if (ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_NAMED) /* Node (name) ptr OK as-is */ {
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);
}
if (AML_NAME_OP == obj_desc->reference.opcode) {
/*
* Convert an indirect name ptr to direct name ptr and put
* it on the stack
*/
temp_node = obj_desc->reference.object;
acpi_ut_remove_reference (obj_desc);
(*stack_ptr) = temp_node;
}
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) &&
(ACPI_GET_OBJECT_TYPE (*stack_ptr) == ACPI_TYPE_LOCAL_REFERENCE) &&
((*stack_ptr)->reference.opcode == AML_INDEX_OP)) {
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: /* Number */
/*
* 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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Integer/String/Buffer], found [%s] %p\n",
acpi_ut_get_object_type_name (obj_desc), obj_desc));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
return_ACPI_STATUS (status);
}
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Integer/String/Buffer], found [%s] %p\n",
acpi_ut_get_object_type_name (obj_desc), obj_desc));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
return_ACPI_STATUS (status);
}
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Integer/String/Buffer], found [%s] %p\n",
acpi_ut_get_object_type_name (obj_desc), obj_desc));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
return_ACPI_STATUS (status);
}
goto next_operand;
case ARGI_COMPUTEDATA:
/* Need an operand of type INTEGER, STRING or BUFFER */
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/* Valid operand */
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Integer/String/Buffer], found [%s] %p\n",
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 (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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);
}
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Integer/String/Buffer], found [%s] %p\n",
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 (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_PACKAGE:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
case ACPI_TYPE_LOCAL_REFERENCE:
/* Valid operand */
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Buffer/String/Package/Reference], found [%s] %p\n",
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 (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_PACKAGE:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/* Valid operand */
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Buffer/String/Package], found [%s] %p\n",
acpi_ut_get_object_type_name (obj_desc), obj_desc));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
goto next_operand;
case ARGI_REGION_OR_FIELD:
/* Need an operand of type ACPI_TYPE_REGION or a FIELD in a region */
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_REGION:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
/* Valid operand */
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed [Region/region_field], found [%s] %p\n",
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 (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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;
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n",
acpi_ut_get_object_type_name (obj_desc), obj_desc));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
goto next_operand;
default:
/* Unknown type */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Internal - Unknown ARGI (required operand) type %X\n",
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,
ACPI_GET_OBJECT_TYPE (*stack_ptr), *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--;
}
} /* while (*Types) */
return_ACPI_STATUS (status);
}
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