📄 dswexec.c
字号:
/******************************************************************************
*
* Module Name: dswexec - Dispatcher method execution callbacks;
* dispatch to interpreter.
* $Revision: 1.1 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <acpi.h>
#define _COMPONENT ACPI_DISPATCHER
MODULE_NAME ("dswexec")
/*****************************************************************************
*
* FUNCTION: Acpi_ds_get_predicate_value
*
* PARAMETERS: Walk_state - Current state of the parse tree walk
*
* RETURN: Status
*
* DESCRIPTION: Get the result of a predicate evaluation
*
****************************************************************************/
ACPI_STATUS
acpi_ds_get_predicate_value (
ACPI_WALK_STATE *walk_state,
ACPI_PARSE_OBJECT *op,
u32 has_result_obj)
{
ACPI_STATUS status = AE_OK;
ACPI_OPERAND_OBJECT *obj_desc;
walk_state->control_state->common.state = 0;
if (has_result_obj) {
status = acpi_ds_result_pop (&obj_desc, walk_state);
if (ACPI_FAILURE (status)) {
return (status);
}
}
else {
status = acpi_ds_create_operand (walk_state, op, 0);
if (ACPI_FAILURE (status)) {
return (status);
}
status = acpi_aml_resolve_to_value (&walk_state->operands [0], walk_state);
if (ACPI_FAILURE (status)) {
return (status);
}
obj_desc = walk_state->operands [0];
}
if (!obj_desc) {
return (AE_AML_NO_OPERAND);
}
/*
* Result of predicate evaluation currently must
* be a number
*/
if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
status = AE_AML_OPERAND_TYPE;
goto cleanup;
}
/* Truncate the predicate to 32-bits if necessary */
acpi_aml_truncate_for32bit_table (obj_desc, walk_state);
/*
* Save the result of the predicate evaluation on
* the control stack
*/
if (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:
/* Break to debugger to display result */
DEBUGGER_EXEC (acpi_db_display_result_object (obj_desc, walk_state));
/*
* Delete the predicate result object (we know that
* we don't need it anymore)
*/
acpi_cm_remove_reference (obj_desc);
walk_state->control_state->common.state = CONTROL_NORMAL;
return (status);
}
/*****************************************************************************
*
* FUNCTION: Acpi_ds_exec_begin_op
*
* PARAMETERS: Walk_state - Current state of the parse tree walk
* Op - Op that has been just been reached in the
* walk; Arguments have not been evaluated yet.
*
* 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 (
u16 opcode,
ACPI_PARSE_OBJECT *op,
ACPI_WALK_STATE *walk_state,
ACPI_PARSE_OBJECT **out_op)
{
ACPI_OPCODE_INFO *op_info;
ACPI_STATUS status = AE_OK;
if (!op) {
status = acpi_ds_load2_begin_op (opcode, NULL, walk_state, out_op);
if (ACPI_FAILURE (status)) {
return (status);
}
op = *out_op;
}
if (op == walk_state->origin) {
if (out_op) {
*out_op = op;
}
return (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 ==
CONTROL_CONDITIONAL_EXECUTING)) {
walk_state->control_state->common.state = CONTROL_PREDICATE_EXECUTING;
/* Save start of predicate */
walk_state->control_state->control.predicate_op = op;
}
op_info = acpi_ps_get_opcode_info (op->opcode);
/* We want to send namepaths to the load code */
if (op->opcode == AML_NAMEPATH_OP) {
op_info->flags = OPTYPE_NAMED_OBJECT;
}
/*
* Handle the opcode based upon the opcode type
*/
switch (ACPI_GET_OP_CLASS (op_info)) {
case OPTYPE_CONTROL:
status = acpi_ds_result_stack_push (walk_state);
if (ACPI_FAILURE (status)) {
return (status);
}
status = acpi_ds_exec_begin_control_op (walk_state, op);
break;
case OPTYPE_NAMED_OBJECT:
if (walk_state->walk_type == 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 (op->opcode, op, walk_state, NULL);
}
if (op->opcode == AML_REGION_OP) {
status = acpi_ds_result_stack_push (walk_state);
}
break;
/* most operators with arguments */
case OPTYPE_MONADIC1:
case OPTYPE_DYADIC1:
case OPTYPE_MONADIC2:
case OPTYPE_MONADIC2_r:
case OPTYPE_DYADIC2:
case OPTYPE_DYADIC2_r:
case OPTYPE_DYADIC2_s:
case OPTYPE_RECONFIGURATION:
case OPTYPE_INDEX:
case OPTYPE_MATCH:
case OPTYPE_FATAL:
case OPTYPE_CREATE_FIELD:
/* 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 (status);
}
/*****************************************************************************
*
* FUNCTION: Acpi_ds_exec_end_op
*
* PARAMETERS: Walk_state - Current state of the parse tree walk
* Op - Op that has been just been completed in the
* walk; Arguments have now been evaluated.
*
* 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 (
ACPI_WALK_STATE *walk_state,
ACPI_PARSE_OBJECT *op)
{
ACPI_STATUS status = AE_OK;
u16 opcode;
u8 optype;
ACPI_PARSE_OBJECT *next_op;
ACPI_NAMESPACE_NODE *node;
ACPI_PARSE_OBJECT *first_arg;
ACPI_OPERAND_OBJECT *result_obj = NULL;
ACPI_OPCODE_INFO *op_info;
u32 operand_index;
opcode = (u16) op->opcode;
op_info = acpi_ps_get_opcode_info (op->opcode);
if (ACPI_GET_OP_TYPE (op_info) != ACPI_OP_TYPE_OPCODE) {
return (AE_NOT_IMPLEMENTED);
}
optype = (u8) ACPI_GET_OP_CLASS (op_info);
first_arg = op->value.arg;
/* Init the walk state */
walk_state->num_operands = 0;
walk_state->return_desc = NULL;
walk_state->op_info = op_info;
walk_state->opcode = opcode;
/* Call debugger for single step support (DEBUG build only) */
DEBUGGER_EXEC (status = acpi_db_single_step (walk_state, op, optype));
DEBUGGER_EXEC (if (ACPI_FAILURE (status)) {return (status);});
/* Decode the opcode */
switch (optype) {
case OPTYPE_UNDEFINED:
return (AE_NOT_IMPLEMENTED);
break;
case OPTYPE_BOGUS:
break;
case OPTYPE_CONSTANT: /* argument type only */
case OPTYPE_LITERAL: /* argument type only */
case OPTYPE_DATA_TERM: /* argument type only */
case OPTYPE_LOCAL_VARIABLE: /* argument type only */
case OPTYPE_METHOD_ARGUMENT: /* argument type only */
break;
/* most operators with arguments */
case OPTYPE_MONADIC1:
case OPTYPE_DYADIC1:
case OPTYPE_MONADIC2:
case OPTYPE_MONADIC2_r:
case OPTYPE_DYADIC2:
case OPTYPE_DYADIC2_r:
case OPTYPE_DYADIC2_s:
case OPTYPE_RECONFIGURATION:
case OPTYPE_INDEX:
case OPTYPE_MATCH:
case OPTYPE_FATAL:
/* Build resolved operand stack */
status = acpi_ds_create_operands (walk_state, first_arg);
if (ACPI_FAILURE (status)) {
goto cleanup;
}
operand_index = walk_state->num_operands - 1;
/* 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;
}
switch (optype) {
case OPTYPE_MONADIC1:
/* 1 Operand, 0 External_result, 0 Internal_result */
status = acpi_aml_exec_monadic1 (opcode, walk_state);
break;
case OPTYPE_MONADIC2:
/* 1 Operand, 0 External_result, 1 Internal_result */
status = acpi_aml_exec_monadic2 (opcode, walk_state, &result_obj);
break;
case OPTYPE_MONADIC2_r:
/* 1 Operand, 1 External_result, 1 Internal_result */
status = acpi_aml_exec_monadic2_r (opcode, walk_state, &result_obj);
break;
case OPTYPE_DYADIC1:
/* 2 Operands, 0 External_result, 0 Internal_result */
status = acpi_aml_exec_dyadic1 (opcode, walk_state);
break;
case OPTYPE_DYADIC2:
/* 2 Operands, 0 External_result, 1 Internal_result */
status = acpi_aml_exec_dyadic2 (opcode, walk_state, &result_obj);
break;
case OPTYPE_DYADIC2_r:
/* 2 Operands, 1 or 2 External_results, 1 Internal_result */
status = acpi_aml_exec_dyadic2_r (opcode, walk_state, &result_obj);
break;
case OPTYPE_DYADIC2_s: /* Synchronization Operator */
/* 2 Operands, 0 External_result, 1 Internal_result */
status = acpi_aml_exec_dyadic2_s (opcode, walk_state, &result_obj);
break;
case OPTYPE_INDEX: /* Type 2 opcode with 3 operands */
/* 3 Operands, 1 External_result, 1 Internal_result */
status = acpi_aml_exec_index (walk_state, &result_obj);
break;
case OPTYPE_MATCH: /* Type 2 opcode with 6 operands */
/* 6 Operands, 0 External_result, 1 Internal_result */
status = acpi_aml_exec_match (walk_state, &result_obj);
break;
case OPTYPE_RECONFIGURATION:
/* 1 or 2 operands, 0 Internal Result */
status = acpi_aml_exec_reconfiguration (opcode, walk_state);
break;
case OPTYPE_FATAL:
/* 3 Operands, 0 External_result, 0 Internal_result */
status = acpi_aml_exec_fatal (walk_state);
break;
}
/*
* If a result object was returned from above, push it on the
* current result stack
*/
if (ACPI_SUCCESS (status) &&
result_obj) {
status = acpi_ds_result_push (result_obj, walk_state);
}
break;
case OPTYPE_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);
acpi_ds_result_stack_pop (walk_state);
break;
case OPTYPE_METHOD_CALL:
/*
* (AML_METHODCALL) Op->Value->Arg->Node contains
* the method Node pointer
*/
/* Next_op points to the op that holds the method name */
next_op = first_arg;
node = next_op->node;
/* Next_op points to first argument op */
next_op = next_op->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)) {
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 (status);
break;
case OPTYPE_CREATE_FIELD:
status = acpi_ds_load2_end_op (walk_state, op);
if (ACPI_FAILURE (status)) {
break;
}
status = acpi_ds_eval_field_unit_operands (walk_state, op);
break;
case OPTYPE_NAMED_OBJECT:
status = acpi_ds_load2_end_op (walk_state, op);
if (ACPI_FAILURE (status)) {
break;
}
switch (op->opcode) {
case AML_REGION_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_METHOD_OP:
break;
case AML_ALIAS_OP:
/* Alias creation was already handled by call
to psxload above */
break;
default:
/* Nothing needs to be done */
status = AE_OK;
break;
}
break;
default:
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_aml_truncate_for32bit_table (result_obj, walk_state);
/*
* Check if we just completed the evaluation of a
* conditional predicate
*/
if ((walk_state->control_state) &&
(walk_state->control_state->common.state ==
CONTROL_PREDICATE_EXECUTING) &&
(walk_state->control_state->control.predicate_op == op)) {
status = acpi_ds_get_predicate_value (walk_state, op, (u32) result_obj);
result_obj = NULL;
}
cleanup:
if (result_obj) {
/* Break to debugger to display result */
DEBUGGER_EXEC (acpi_db_display_result_object (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, result_obj, walk_state);
}
/* Always clear the object stack */
/* TBD: [Investigate] Clear stack of return value,
but don't delete it */
walk_state->num_operands = 0;
return (status);
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -