patch-2.4.14 linux/drivers/acpi/executer/exoparg3.c

• Lines: 236
• Date: Wed Oct 24 14:06:22 2001
• Orig file: v2.4.13/linux/drivers/acpi/executer/exoparg3.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.13/linux/drivers/acpi/executer/exoparg3.c linux/drivers/acpi/executer/exoparg3.c
@@ -0,0 +1,235 @@
+
+/******************************************************************************
+ *
+ * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
+ *              $Revision: 3 $
+ *
+ *****************************************************************************/
+
+/*
+ *  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         ("exoparg3")
+
+
+/*!
+ * 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_opcode_3A_0T_0R
+ *
+ * PARAMETERS:  Walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute Triadic operator (3 operands)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_3A_0T_0R (
+	acpi_walk_state         *walk_state)
+{
+	acpi_operand_object     **operand = &walk_state->operands[0];
+	ACPI_SIGNAL_FATAL_INFO  *fatal;
+	acpi_status             status = AE_OK;
+
+
+	FUNCTION_TRACE_STR ("Ex_opcode_3A_0T_0R", acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+	switch (walk_state->opcode) {
+
+	case AML_FATAL_OP:          /* Fatal (Fatal_type Fatal_code Fatal_arg)   */
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+			"Fatal_op: Type %x Code %x Arg %x <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
+			(u32) operand[0]->integer.value, (u32) operand[1]->integer.value,
+			(u32) operand[2]->integer.value));
+
+
+		fatal = ACPI_MEM_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
+		if (fatal) {
+			fatal->type     = (u32) operand[0]->integer.value;
+			fatal->code     = (u32) operand[1]->integer.value;
+			fatal->argument = (u32) operand[2]->integer.value;
+		}
+
+		/*
+		 * Always signal the OS!
+		 */
+		acpi_os_signal (ACPI_SIGNAL_FATAL, fatal);
+
+		/* Might return while OS is shutting down, just continue */
+
+		ACPI_MEM_FREE (fatal);
+		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;
+	}
+
+
+cleanup:
+
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ex_opcode_3A_1T_1R
+ *
+ * PARAMETERS:  Walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute Triadic operator (3 operands)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_opcode_3A_1T_1R (
+	acpi_walk_state         *walk_state)
+{
+	acpi_operand_object     **operand = &walk_state->operands[0];
+	acpi_operand_object     *return_desc = NULL;
+	char                    *buffer;
+	acpi_status             status = AE_OK;
+	u32                     index;
+	u32                     length;
+
+
+	FUNCTION_TRACE_STR ("Ex_opcode_3A_1T_1R", acpi_ps_get_opcode_name (walk_state->opcode));
+
+
+	switch (walk_state->opcode) {
+	case AML_MID_OP:        /* Mid  (Source[0], Index[1], Length[2], Result[3]) */
+
+		/*
+		 * Create the return object.  The Source operand is guaranteed to be
+		 * either a String or a Buffer, so just use its type.
+		 */
+		return_desc = acpi_ut_create_internal_object (operand[0]->common.type);
+		if (!return_desc) {
+			status = AE_NO_MEMORY;
+			goto cleanup;
+		}
+
+		/* Get the Integer values from the objects */
+
+		index = (u32) operand[1]->integer.value;
+		length = (u32) operand[2]->integer.value;
+
+		/*
+		 * If the index is beyond the length of the String/Buffer, or if the
+		 * requested length is zero, return a zero-length String/Buffer
+		 */
+		if ((index < operand[0]->string.length) &&
+			(length > 0)) {
+			/* Truncate request if larger than the actual String/Buffer */
+
+			if ((index + length) >
+				operand[0]->string.length) {
+				length = operand[0]->string.length - index;
+			}
+
+			/* Allocate a new buffer for the String/Buffer */
+
+			buffer = ACPI_MEM_CALLOCATE (length + 1);
+			if (!buffer) {
+				return (AE_NO_MEMORY);
+			}
+
+			/* Copy the portion requested */
+
+			MEMCPY (buffer, operand[0]->string.pointer + index,
+					length);
+
+			/* Set the length of the new String/Buffer */
+
+			return_desc->string.pointer = buffer;
+			return_desc->string.length = length;
+		}
+
+		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;
+	}
+
+	/* Store the result in the target */
+
+	status = acpi_ex_store (return_desc, operand[3], walk_state);
+
+cleanup:
+
+	/* Delete return object on error */
+
+	if (ACPI_FAILURE (status)) {
+		acpi_ut_remove_reference (return_desc);
+	}
+
+	/* Set the return object and exit */
+
+	walk_state->result_obj = return_desc;
+	return_ACPI_STATUS (status);
+}
+
+