patch-2.4.14 linux/drivers/acpi/executer/exoparg6.c

• Lines: 277
• Date: Wed Oct 24 14:06:22 2001
• Orig file: v2.4.13/linux/drivers/acpi/executer/exoparg6.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.13/linux/drivers/acpi/executer/exoparg6.c linux/drivers/acpi/executer/exoparg6.c
@@ -0,0 +1,276 @@
+
+/******************************************************************************
+ *
+ * Module Name: exoparg6 - AML execution - opcodes with 6 arguments
+ *              $Revision: 4 $
+ *
+ *****************************************************************************/
+
+/*
+ *  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"
+#include "acinterp.h"
+#include "acparser.h"
+#include "amlcode.h"
+
+
+#define _COMPONENT          ACPI_EXECUTER
+	 MODULE_NAME         ("exoparg6")
+
+
+/*!
+ * Naming convention for AML interpreter execution routines.
+ *
+ * The routines that begin execution of AML opcodes are named with a common
+ * convention based upon the number of arguments, the number of target operands,
+ * and whether or not a value is returned:
+ *
+ *      AcpiExOpcode_xA_yT_zR
+ *
+ * Where:
+ *
+ * xA - ARGUMENTS:    The number of arguments (input operands) that are
+ *                    required for this opcode type (1 through 6 args).
+ * yT - TARGETS:      The number of targets (output operands) that are required
+ *                    for this opcode type (0, 1, or 2 targets).
+ * zR - RETURN VALUE: Indicates whether this opcode type returns a value
+ *                    as the function return (0 or 1).
+ *
+ * The AcpiExOpcode* functions are called via the Dispatcher component with
+ * fully resolved operands.
+!*/
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_do_match
+ *
+ * PARAMETERS:  Match_op        - The AML match operand
+ *              Package_value   - Value from the target package
+ *              Match_value     - Value to be matched
+ *
+ * RETURN:      TRUE if the match is successful, FALSE otherwise
+ *
+ * DESCRIPTION: Implements the low-level match for the ASL Match operator
+ *
+ ******************************************************************************/
+
+u8
+acpi_ex_do_match (
+	u32                     match_op,
+	acpi_integer            package_value,
+	acpi_integer            match_value)
+{
+
+	switch (match_op) {
+	case MATCH_MTR:   /* always true */
+
+		break;
+
+
+	case MATCH_MEQ:   /* true if equal   */
+
+		if (package_value != match_value) {
+			return (FALSE);
+		}
+		break;
+
+
+	case MATCH_MLE:   /* true if less than or equal  */
+
+		if (package_value > match_value) {
+			return (FALSE);
+		}
+		break;
+
+
+	case MATCH_MLT:   /* true if less than   */
+
+		if (package_value >= match_value) {
+			return (FALSE);
+		}
+		break;
+
+
+	case MATCH_MGE:   /* true if greater than or equal   */
+
+		if (package_value < match_value) {
+			return (FALSE);
+		}
+		break;
+
+
+	case MATCH_MGT:   /* true if greater than    */
+
+		if (package_value <= match_value) {
+			return (FALSE);
+		}
+		break;
+
+
+	default:    /* undefined   */
+
+		return (FALSE);
+	}
+
+
+	return TRUE;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_opcode_6A_0T_1R
+ *
+ * PARAMETERS:  Walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute opcode with 6 arguments, no target, and a return value
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_6A_0T_1R (
+	acpi_walk_state         *walk_state)
+{
+	acpi_operand_object     **operand = &walk_state->operands[0];
+	acpi_operand_object     *return_desc = NULL;
+	acpi_status             status = AE_OK;
+	u32                     index;
+	acpi_operand_object     *this_element;
+
+
+	FUNCTION_TRACE_STR ("Ex_opcode_6A_0T_1R", acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+	switch (walk_state->opcode) {
+	case AML_MATCH_OP:
+		/*
+		 * Match (Search_package[0], Match_op1[1], Match_object1[2],
+		 *                          Match_op2[3], Match_object2[4], Start_index[5])
+		 */
+
+		/* Validate match comparison sub-opcodes */
+
+		if ((operand[1]->integer.value > MAX_MATCH_OPERATOR) ||
+			(operand[3]->integer.value > MAX_MATCH_OPERATOR)) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "operation encoding out of range\n"));
+			status = AE_AML_OPERAND_VALUE;
+			goto cleanup;
+		}
+
+		index = (u32) operand[5]->integer.value;
+		if (index >= (u32) operand[0]->package.count) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Index beyond package end\n"));
+			status = AE_AML_PACKAGE_LIMIT;
+			goto cleanup;
+		}
+
+		return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
+		if (!return_desc) {
+			status = AE_NO_MEMORY;
+			goto cleanup;
+
+		}
+
+		/* Default return value if no match found */
+
+		return_desc->integer.value = ACPI_INTEGER_MAX;
+
+		/*
+		 * Examine each element until a match is found.  Within the loop,
+		 * "continue" signifies that the current element does not match
+		 * and the next should be examined.
+		 * Upon finding a match, the loop will terminate via "break" at
+		 * the bottom.  If it terminates "normally", Match_value will be -1
+		 * (its initial value) indicating that no match was found.  When
+		 * returned as a Number, this will produce the Ones value as specified.
+		 */
+		for ( ; index < operand[0]->package.count; index++) {
+			this_element = operand[0]->package.elements[index];
+
+			/*
+			 * Treat any NULL or non-numeric elements as non-matching.
+			 * TBD [Unhandled] - if an element is a Name,
+			 *      should we examine its value?
+			 */
+			if (!this_element ||
+				this_element->common.type != ACPI_TYPE_INTEGER) {
+				continue;
+			}
+
+
+			/*
+			 * Within these switch statements:
+			 *      "break" (exit from the switch) signifies a match;
+			 *      "continue" (proceed to next iteration of enclosing
+			 *          "for" loop) signifies a non-match.
+			 */
+			if (!acpi_ex_do_match ((u32) operand[1]->integer.value,
+					   this_element->integer.value, operand[2]->integer.value)) {
+				continue;
+			}
+
+
+			if (!acpi_ex_do_match ((u32) operand[3]->integer.value,
+					   this_element->integer.value, operand[4]->integer.value)) {
+				continue;
+			}
+
+			/* Match found: Index is the return value */
+
+			return_desc->integer.value = index;
+			break;
+		}
+
+		break;
+
+
+	case AML_LOAD_TABLE_OP:
+
+		status = AE_NOT_IMPLEMENTED;
+		goto cleanup;
+		break;
+
+
+	default:
+
+		REPORT_ERROR (("Acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n",
+				walk_state->opcode));
+		status = AE_AML_BAD_OPCODE;
+		goto cleanup;
+		break;
+	}
+
+
+	walk_state->result_obj = return_desc;
+
+
+cleanup:
+
+	/* Delete return object on error */
+
+	if (ACPI_FAILURE (status)) {
+		acpi_ut_remove_reference (return_desc);
+	}
+
+	return_ACPI_STATUS (status);
+}