patch-2.4.0-test3 linux/drivers/acpi/dispatcher/dswexec.c

• Lines: 573
• Date: Wed Jul 5 11:23:12 2000
• Orig file: v2.4.0-test2/linux/drivers/acpi/dispatcher/dswexec.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/acpi/dispatcher/dswexec.c linux/drivers/acpi/dispatcher/dswexec.c
@@ -0,0 +1,572 @@
+/******************************************************************************
+ *
+ * Module Name: dswexec - Dispatcher method execution callbacks;
+ *                          Dispatch to interpreter.
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000 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"
+#include "parser.h"
+#include "amlcode.h"
+#include "dispatch.h"
+#include "interp.h"
+#include "namesp.h"
+#include "debugger.h"
+
+
+#define _COMPONENT          DISPATCHER
+	 MODULE_NAME         ("dswexec");
+
+
+/*****************************************************************************
+ *
+ * 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 (
+	ACPI_WALK_STATE         *walk_state,
+	ACPI_GENERIC_OP         *op)
+{
+	ACPI_OP_INFO            *op_info;
+	ACPI_STATUS             status = AE_OK;
+
+
+	if (op == walk_state->origin) {
+		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 (op_info->flags & OP_INFO_TYPE)
+	{
+	case OPTYPE_CONTROL:
+
+		status = acpi_ds_exec_begin_control_op (walk_state, op);
+		break;
+
+
+	case OPTYPE_NAMED_OBJECT:
+
+		if (walk_state->origin->opcode == AML_METHOD_OP) {
+			/*
+			 * 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, op);
+		}
+		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_GENERIC_OP         *op)
+{
+	ACPI_STATUS             status = AE_OK;
+	u16                     opcode;
+	u8                      optype;
+	ACPI_OBJECT_INTERNAL    *obj_desc;
+	ACPI_GENERIC_OP         *next_op;
+	ACPI_NAMED_OBJECT       *entry;
+	ACPI_GENERIC_OP         *first_arg;
+	ACPI_OBJECT_INTERNAL    *result_obj = NULL;
+	ACPI_OP_INFO            *op_info;
+	u32                     operand_index;
+
+
+	opcode = (u16) op->opcode;
+
+
+	op_info = acpi_ps_get_opcode_info (op->opcode);
+	if (!op_info) {
+		return (AE_NOT_IMPLEMENTED);
+	}
+
+	optype = (u8) (op_info->flags & OP_INFO_TYPE);
+	first_arg = op->value.arg;
+
+	/* Init the walk state */
+
+	walk_state->num_operands = 0;
+	walk_state->return_desc = NULL;
+
+
+	/* Call debugger for single step support (DEBUG build only) */
+
+
+	/* 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_CREATE_FIELD:
+	case OPTYPE_FATAL:
+
+		status = acpi_ds_create_operands (walk_state, first_arg);
+		if (ACPI_FAILURE (status)) {
+			goto cleanup;
+		}
+
+		operand_index = walk_state->num_operands - 1;
+
+		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);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			break;
+
+
+		case OPTYPE_MONADIC2_r:
+
+			/* 1 Operand, 1 External_result, 1 Internal_result */
+
+			status = acpi_aml_exec_monadic2_r (opcode, walk_state, &result_obj);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			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);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			break;
+
+
+		case OPTYPE_DYADIC2_r:
+
+			/* 2 Operands, 1 or 2 External_results, 1 Internal_result */
+
+
+			/* NEW INTERFACE:
+			 * Pass in Walk_state, keep result obj but let interpreter
+			 * push the result
+			 */
+
+			status = acpi_aml_exec_dyadic2_r (opcode, walk_state, &result_obj);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			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);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			break;
+
+
+		case OPTYPE_RECONFIGURATION:
+
+			/* 1 or 2 operands, 0 Internal Result */
+
+			status = acpi_aml_exec_reconfiguration (opcode, walk_state);
+			break;
+
+
+		case OPTYPE_CREATE_FIELD:
+
+			/* 3 or 4 Operands, 0 External_result, 0 Internal_result */
+
+			status = acpi_aml_exec_create_field (opcode, walk_state);
+			break;
+
+
+		case OPTYPE_FATAL:
+
+			/* 3 Operands, 0 External_result, 0 Internal_result */
+
+			status = acpi_aml_exec_fatal (walk_state);
+			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);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			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);
+			if (ACPI_SUCCESS (status)) {
+				status = acpi_ds_result_stack_push (result_obj, walk_state);
+			}
+
+			break;
+		}
+
+		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);
+
+		break;
+
+
+	case OPTYPE_METHOD_CALL:
+
+		/*
+		 * (AML_METHODCALL) Op->Value->Arg->Acpi_named_object contains
+		 * the method NTE pointer
+		 */
+		/* Next_op points to the op that holds the method name */
+		next_op = first_arg;
+		entry = next_op->acpi_named_object;
+
+		/* 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;
+		}
+
+		/* Open new scope on the scope stack */
+/*
+		Status = Acpi_ns_scope_stack_push_entry (Entry);
+		if (ACPI_FAILURE (Status)) {
+			break;
+		}
+*/
+
+		/* Tell the walk loop to preempt this running method and
+		execute the new method */
+
+		status = AE_CTRL_PENDING;
+
+		/* Return now; we don't want to disturb anything,
+		especially the operand count! */
+
+		return (status);
+		break;
+
+
+	case OPTYPE_NAMED_OBJECT:
+
+
+		if ((walk_state->origin->opcode == AML_METHOD_OP) &&
+			(walk_state->origin != op))
+		{
+			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);
+
+			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;
+	}
+
+
+	/*
+	 * 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))
+	{
+		/* Completed the predicate, the result must be a number */
+
+		walk_state->control_state->common.state = 0;
+
+		if (result_obj) {
+			status = acpi_ds_result_stack_pop (&obj_desc, walk_state);
+			if (ACPI_FAILURE (status)) {
+				goto cleanup;
+			}
+		}
+
+		else {
+			status = acpi_ds_create_operand (walk_state, op);
+			if (ACPI_FAILURE (status)) {
+				goto cleanup;
+			}
+
+			status = acpi_aml_resolve_to_value (&walk_state->operands [0]);
+			if (ACPI_FAILURE (status)) {
+				goto cleanup;
+			}
+
+			obj_desc = walk_state->operands [0];
+		}
+
+		if (!obj_desc) {
+			status = AE_AML_NO_OPERAND;
+			goto cleanup;
+		}
+
+		if (obj_desc->common.type != ACPI_TYPE_NUMBER) {
+			status = AE_AML_OPERAND_TYPE;
+			goto cleanup;
+		}
+		/* Save the result of the predicate evaluation on
+		the control stack */
+
+		if (obj_desc->number.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;
+		}
+
+		 /* Break to debugger to display result */
+
+		/* Delete the predicate result object (we know that
+		we don't need it anymore) and cleanup the stack */
+
+		acpi_cm_remove_reference (obj_desc);
+		result_obj = NULL;
+
+		walk_state->control_state->common.state = CONTROL_NORMAL;
+	}
+
+
+cleanup:
+
+	if (result_obj) {
+		/* Break to debugger to display result */
+
+		/*
+		 * 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);
+}
+
+