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kernel-ark/drivers/acpi/dispatcher/dswexec.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore 
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

757 lines
20 KiB
C
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/******************************************************************************
*
* Module Name: dswexec - Dispatcher method execution callbacks;
* dispatch to interpreter.
*
*****************************************************************************/
/*
* 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/acparser.h>
#include <acpi/amlcode.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#include <acpi/acnamesp.h>
#include <acpi/acdebug.h>
#include <acpi/acdisasm.h>
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME ("dswexec")
/*
* Dispatch table for opcode classes
*/
static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch [] = {
acpi_ex_opcode_0A_0T_1R,
acpi_ex_opcode_1A_0T_0R,
acpi_ex_opcode_1A_0T_1R,
acpi_ex_opcode_1A_1T_0R,
acpi_ex_opcode_1A_1T_1R,
acpi_ex_opcode_2A_0T_0R,
acpi_ex_opcode_2A_0T_1R,
acpi_ex_opcode_2A_1T_1R,
acpi_ex_opcode_2A_2T_1R,
acpi_ex_opcode_3A_0T_0R,
acpi_ex_opcode_3A_1T_1R,
acpi_ex_opcode_6A_0T_1R};
/*****************************************************************************
*
* FUNCTION: acpi_ds_get_predicate_value
*
* PARAMETERS: walk_state - Current state of the parse tree walk
* result_obj - if non-zero, pop result from result stack
*
* RETURN: Status
*
* DESCRIPTION: Get the result of a predicate evaluation
*
****************************************************************************/
acpi_status
acpi_ds_get_predicate_value (
struct acpi_walk_state *walk_state,
union acpi_operand_object *result_obj) {
acpi_status status = AE_OK;
union acpi_operand_object *obj_desc;
union acpi_operand_object *local_obj_desc = NULL;
ACPI_FUNCTION_TRACE_PTR ("ds_get_predicate_value", walk_state);
walk_state->control_state->common.state = 0;
if (result_obj) {
status = acpi_ds_result_pop (&obj_desc, walk_state);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not get result from predicate evaluation, %s\n",
acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
}
else {
status = acpi_ds_create_operand (walk_state, walk_state->op, 0);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_ex_resolve_to_value (&walk_state->operands [0], walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
obj_desc = walk_state->operands [0];
}
if (!obj_desc) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"No predicate obj_desc=%p State=%p\n",
obj_desc, walk_state));
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
/*
* Result of predicate evaluation must be an Integer
* object. Implicitly convert the argument if necessary.
*/
status = acpi_ex_convert_to_integer (obj_desc, &local_obj_desc, 16);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
if (ACPI_GET_OBJECT_TYPE (local_obj_desc) != ACPI_TYPE_INTEGER) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Bad predicate (not an integer) obj_desc=%p State=%p Type=%X\n",
obj_desc, walk_state, ACPI_GET_OBJECT_TYPE (obj_desc)));
status = AE_AML_OPERAND_TYPE;
goto cleanup;
}
/* Truncate the predicate to 32-bits if necessary */
acpi_ex_truncate_for32bit_table (local_obj_desc);
/*
* Save the result of the predicate evaluation on
* the control stack
*/
if (local_obj_desc->integer.value) {
walk_state->control_state->common.value = TRUE;
}
else {
/*
* Predicate is FALSE, we will just toss the
* rest of the package
*/
walk_state->control_state->common.value = FALSE;
status = AE_CTRL_FALSE;
}
cleanup:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
walk_state->control_state->common.value, walk_state->op));
/* Break to debugger to display result */
ACPI_DEBUGGER_EXEC (acpi_db_display_result_object (local_obj_desc, walk_state));
/*
* Delete the predicate result object (we know that
* we don't need it anymore)
*/
if (local_obj_desc != obj_desc) {
acpi_ut_remove_reference (local_obj_desc);
}
acpi_ut_remove_reference (obj_desc);
walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
return_ACPI_STATUS (status);
}
/*****************************************************************************
*
* FUNCTION: acpi_ds_exec_begin_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
* out_op - Where to return op if a new one is created
*
* RETURN: Status
*
* DESCRIPTION: Descending callback used during the execution of control
* methods. This is where most operators and operands are
* dispatched to the interpreter.
*
****************************************************************************/
acpi_status
acpi_ds_exec_begin_op (
struct acpi_walk_state *walk_state,
union acpi_parse_object **out_op)
{
union acpi_parse_object *op;
acpi_status status = AE_OK;
u32 opcode_class;
ACPI_FUNCTION_TRACE_PTR ("ds_exec_begin_op", walk_state);
op = walk_state->op;
if (!op) {
status = acpi_ds_load2_begin_op (walk_state, out_op);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
op = *out_op;
walk_state->op = op;
walk_state->opcode = op->common.aml_opcode;
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
if (acpi_ns_opens_scope (walk_state->op_info->object_type)) {
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"(%s) Popping scope for Op %p\n",
acpi_ut_get_type_name (walk_state->op_info->object_type), op));
status = acpi_ds_scope_stack_pop (walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
}
if (op == walk_state->origin) {
if (out_op) {
*out_op = op;
}
return_ACPI_STATUS (AE_OK);
}
/*
* If the previous opcode was a conditional, this opcode
* must be the beginning of the associated predicate.
* Save this knowledge in the current scope descriptor
*/
if ((walk_state->control_state) &&
(walk_state->control_state->common.state ==
ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",
op, walk_state));
walk_state->control_state->common.state = ACPI_CONTROL_PREDICATE_EXECUTING;
/* Save start of predicate */
walk_state->control_state->control.predicate_op = op;
}
opcode_class = walk_state->op_info->class;
/* We want to send namepaths to the load code */
if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
opcode_class = AML_CLASS_NAMED_OBJECT;
}
/*
* Handle the opcode based upon the opcode type
*/
switch (opcode_class) {
case AML_CLASS_CONTROL:
status = acpi_ds_result_stack_push (walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_ds_exec_begin_control_op (walk_state, op);
break;
case AML_CLASS_NAMED_OBJECT:
if (walk_state->walk_type == ACPI_WALK_METHOD) {
/*
* Found a named object declaration during method execution;
* we must enter this object into the namespace. The created
* object is temporary and will be deleted upon completion of
* the execution of this method.
*/
status = acpi_ds_load2_begin_op (walk_state, NULL);
}
if (op->common.aml_opcode == AML_REGION_OP) {
status = acpi_ds_result_stack_push (walk_state);
}
break;
case AML_CLASS_EXECUTE:
case AML_CLASS_CREATE:
/*
* Most operators with arguments.
* Start a new result/operand state
*/
status = acpi_ds_result_stack_push (walk_state);
break;
default:
break;
}
/* Nothing to do here during method execution */
return_ACPI_STATUS (status);
}
/*****************************************************************************
*
* FUNCTION: acpi_ds_exec_end_op
*
* PARAMETERS: walk_state - Current state of the parse tree walk
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback used during the execution of control
* methods. The only thing we really need to do here is to
* notice the beginning of IF, ELSE, and WHILE blocks.
*
****************************************************************************/
acpi_status
acpi_ds_exec_end_op (
struct acpi_walk_state *walk_state)
{
union acpi_parse_object *op;
acpi_status status = AE_OK;
u32 op_type;
u32 op_class;
union acpi_parse_object *next_op;
union acpi_parse_object *first_arg;
ACPI_FUNCTION_TRACE_PTR ("ds_exec_end_op", walk_state);
op = walk_state->op;
op_type = walk_state->op_info->type;
op_class = walk_state->op_info->class;
if (op_class == AML_CLASS_UNKNOWN) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown opcode %X\n", op->common.aml_opcode));
return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
}
first_arg = op->common.value.arg;
/* Init the walk state */
walk_state->num_operands = 0;
walk_state->return_desc = NULL;
walk_state->result_obj = NULL;
/* Call debugger for single step support (DEBUG build only) */
ACPI_DEBUGGER_EXEC (status = acpi_db_single_step (walk_state, op, op_class));
ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (status)) {return_ACPI_STATUS (status);});
/* Decode the Opcode Class */
switch (op_class) {
case AML_CLASS_ARGUMENT: /* constants, literals, etc. - do nothing */
break;
case AML_CLASS_EXECUTE: /* most operators with arguments */
/* Build resolved operand stack */
status = acpi_ds_create_operands (walk_state, first_arg);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/* Done with this result state (Now that operand stack is built) */
status = acpi_ds_result_stack_pop (walk_state);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/*
* All opcodes require operand resolution, with the only exceptions
* being the object_type and size_of operators.
*/
if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
/* Resolve all operands */
status = acpi_ex_resolve_operands (walk_state->opcode,
&(walk_state->operands [walk_state->num_operands -1]),
walk_state);
if (ACPI_SUCCESS (status)) {
ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE,
acpi_ps_get_opcode_name (walk_state->opcode),
walk_state->num_operands, "after ex_resolve_operands");
}
}
if (ACPI_SUCCESS (status)) {
/*
* Dispatch the request to the appropriate interpreter handler
* routine. There is one routine per opcode "type" based upon the
* number of opcode arguments and return type.
*/
status = acpi_gbl_op_type_dispatch[op_type] (walk_state);
}
else {
/*
* Treat constructs of the form "Store(local_x,local_x)" as noops when the
* Local is uninitialized.
*/
if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
(walk_state->opcode == AML_STORE_OP) &&
(walk_state->operands[0]->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
(walk_state->operands[1]->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
(walk_state->operands[0]->reference.opcode ==
walk_state->operands[1]->reference.opcode) &&
(walk_state->operands[0]->reference.offset ==
walk_state->operands[1]->reference.offset)) {
status = AE_OK;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"[%s]: Could not resolve operands, %s\n",
acpi_ps_get_opcode_name (walk_state->opcode),
acpi_format_exception (status)));
}
}
/* Always delete the argument objects and clear the operand stack */
acpi_ds_clear_operands (walk_state);
/*
* If a result object was returned from above, push it on the
* current result stack
*/
if (ACPI_SUCCESS (status) &&
walk_state->result_obj) {
status = acpi_ds_result_push (walk_state->result_obj, walk_state);
}
break;
default:
switch (op_type) {
case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
/* 1 Operand, 0 external_result, 0 internal_result */
status = acpi_ds_exec_end_control_op (walk_state, op);
/* Make sure to properly pop the result stack */
if (ACPI_SUCCESS (status)) {
status = acpi_ds_result_stack_pop (walk_state);
}
else if (status == AE_CTRL_PENDING) {
status = acpi_ds_result_stack_pop (walk_state);
if (ACPI_SUCCESS (status)) {
status = AE_CTRL_PENDING;
}
}
break;
case AML_TYPE_METHOD_CALL:
/*
* If the method is referenced from within a package
* declaration, it is not a invocation of the method, just
* a reference to it.
*/
if ((op->asl.parent) &&
((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP) ||
(op->asl.parent->asl.aml_opcode == AML_VAR_PACKAGE_OP))) {
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Method Reference in a Package, Op=%p\n", op));
op->common.node = (struct acpi_namespace_node *) op->asl.value.arg->asl.node->object;
acpi_ut_add_reference (op->asl.value.arg->asl.node->object);
return_ACPI_STATUS (AE_OK);
}
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", op));
/*
* (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
* the method Node pointer
*/
/* next_op points to the op that holds the method name */
next_op = first_arg;
/* next_op points to first argument op */
next_op = next_op->common.next;
/*
* Get the method's arguments and put them on the operand stack
*/
status = acpi_ds_create_operands (walk_state, next_op);
if (ACPI_FAILURE (status)) {
break;
}
/*
* Since the operands will be passed to another control method,
* we must resolve all local references here (Local variables,
* arguments to *this* method, etc.)
*/
status = acpi_ds_resolve_operands (walk_state);
if (ACPI_FAILURE (status)) {
/* On error, clear all resolved operands */
acpi_ds_clear_operands (walk_state);
break;
}
/*
* Tell the walk loop to preempt this running method and
* execute the new method
*/
status = AE_CTRL_TRANSFER;
/*
* Return now; we don't want to disturb anything,
* especially the operand count!
*/
return_ACPI_STATUS (status);
case AML_TYPE_CREATE_FIELD:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Executing create_field Buffer/Index Op=%p\n", op));
status = acpi_ds_load2_end_op (walk_state);
if (ACPI_FAILURE (status)) {
break;
}
status = acpi_ds_eval_buffer_field_operands (walk_state, op);
break;
case AML_TYPE_CREATE_OBJECT:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Executing create_object (Buffer/Package) Op=%p\n", op));
switch (op->common.parent->common.aml_opcode) {
case AML_NAME_OP:
/*
* Put the Node on the object stack (Contains the ACPI Name
* of this object)
*/
walk_state->operands[0] = (void *) op->common.parent->common.node;
walk_state->num_operands = 1;
status = acpi_ds_create_node (walk_state,
op->common.parent->common.node,
op->common.parent);
if (ACPI_FAILURE (status)) {
break;
}
/* Fall through */
/*lint -fallthrough */
case AML_INT_EVAL_SUBTREE_OP:
status = acpi_ds_eval_data_object_operands (walk_state, op,
acpi_ns_get_attached_object (op->common.parent->common.node));
break;
default:
status = acpi_ds_eval_data_object_operands (walk_state, op, NULL);
break;
}
/* Done with result state (Now that operand stack is built) */
status = acpi_ds_result_stack_pop (walk_state);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
/*
* If a result object was returned from above, push it on the
* current result stack
*/
if (walk_state->result_obj) {
status = acpi_ds_result_push (walk_state->result_obj, walk_state);
}
break;
case AML_TYPE_NAMED_FIELD:
case AML_TYPE_NAMED_COMPLEX:
case AML_TYPE_NAMED_SIMPLE:
case AML_TYPE_NAMED_NO_OBJ:
status = acpi_ds_load2_end_op (walk_state);
if (ACPI_FAILURE (status)) {
break;
}
if (op->common.aml_opcode == AML_REGION_OP) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Executing op_region Address/Length Op=%p\n", op));
status = acpi_ds_eval_region_operands (walk_state, op);
if (ACPI_FAILURE (status)) {
break;
}
status = acpi_ds_result_stack_pop (walk_state);
}
break;
case AML_TYPE_UNDEFINED:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Undefined opcode type Op=%p\n", op));
return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
case AML_TYPE_BOGUS:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Internal opcode=%X type Op=%p\n",
walk_state->opcode, op));
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p\n",
op_class, op_type, op->common.aml_opcode, op));
status = AE_NOT_IMPLEMENTED;
break;
}
}
/*
* ACPI 2.0 support for 64-bit integers: Truncate numeric
* result value if we are executing from a 32-bit ACPI table
*/
acpi_ex_truncate_for32bit_table (walk_state->result_obj);
/*
* Check if we just completed the evaluation of a
* conditional predicate
*/
if ((ACPI_SUCCESS (status)) &&
(walk_state->control_state) &&
(walk_state->control_state->common.state ==
ACPI_CONTROL_PREDICATE_EXECUTING) &&
(walk_state->control_state->control.predicate_op == op)) {
status = acpi_ds_get_predicate_value (walk_state, walk_state->result_obj);
walk_state->result_obj = NULL;
}
cleanup:
/* Invoke exception handler on error */
if (ACPI_FAILURE (status) &&
acpi_gbl_exception_handler &&
!(status & AE_CODE_CONTROL)) {
acpi_ex_exit_interpreter ();
status = acpi_gbl_exception_handler (status,
walk_state->method_node->name.integer, walk_state->opcode,
walk_state->aml_offset, NULL);
(void) acpi_ex_enter_interpreter ();
}
if (walk_state->result_obj) {
/* Break to debugger to display result */
ACPI_DEBUGGER_EXEC (acpi_db_display_result_object (walk_state->result_obj,
walk_state));
/*
* Delete the result op if and only if:
* Parent will not use the result -- such as any
* non-nested type2 op in a method (parent will be method)
*/
acpi_ds_delete_result_if_not_used (op, walk_state->result_obj, walk_state);
}
#ifdef _UNDER_DEVELOPMENT
if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
acpi_db_method_end (walk_state);
}
#endif
/* Always clear the object stack */
walk_state->num_operands = 0;
#ifdef ACPI_DISASSEMBLER
/* On error, display method locals/args */
if (ACPI_FAILURE (status)) {
acpi_dm_dump_method_info (status, walk_state, op);
}
#endif
return_ACPI_STATUS (status);
}
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