patch-2.4.0-test3 linux/drivers/acpi/interpreter/amstore.c

• Lines: 375
• Date: Wed Jul 5 11:23:12 2000
• Orig file: v2.4.0-test2/linux/drivers/acpi/interpreter/amstore.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/acpi/interpreter/amstore.c linux/drivers/acpi/interpreter/amstore.c
@@ -0,0 +1,374 @@
+
+/******************************************************************************
+ *
+ * Module Name: amstore - AML Interpreter object store support
+ *
+ *****************************************************************************/
+
+/*
+ *  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 "dispatch.h"
+#include "interp.h"
+#include "amlcode.h"
+#include "namesp.h"
+#include "tables.h"
+
+
+#define _COMPONENT          INTERPRETER
+	 MODULE_NAME         ("amstore");
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_aml_exec_store
+ *
+ * PARAMETERS:  *Val_desc           - Value to be stored
+ *              *Dest_desc          - Where to store it 0 Must be (ACPI_HANDLE)
+ *                                    or an ACPI_OBJECT_INTERNAL of type
+ *                                    Reference; if the latter the descriptor
+ *                                    will be either reused or deleted.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Store the value described by Val_desc into the location
+ *              described by Dest_desc. Called by various interpreter
+ *              functions to store the result of an operation into
+ *              the destination operand.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_aml_exec_store (
+	ACPI_OBJECT_INTERNAL    *val_desc,
+	ACPI_OBJECT_INTERNAL    *dest_desc)
+{
+	ACPI_STATUS             status = AE_OK;
+	ACPI_OBJECT_INTERNAL    *delete_dest_desc = NULL;
+	ACPI_OBJECT_INTERNAL    *tmp_desc;
+	ACPI_NAMED_OBJECT       *entry = NULL;
+	u8                      value = 0;
+	u32                     length;
+	u32                     i;
+
+
+	/* Validate parameters */
+
+	if (!val_desc || !dest_desc) {
+		return (AE_AML_NO_OPERAND);
+	}
+
+	/* Examine the datatype of the Dest_desc */
+
+	if (VALID_DESCRIPTOR_TYPE (dest_desc, ACPI_DESC_TYPE_NAMED)) {
+		/* Dest is an ACPI_HANDLE, create a new object */
+
+		entry = (ACPI_NAMED_OBJECT*) dest_desc;
+		dest_desc = acpi_cm_create_internal_object (INTERNAL_TYPE_REFERENCE);
+		if (!dest_desc) {
+			/* Allocation failure  */
+
+			return (AE_NO_MEMORY);
+		}
+
+		/* Build a new Reference wrapper around the handle */
+
+		dest_desc->reference.op_code = AML_NAME_OP;
+		dest_desc->reference.object = entry;
+	}
+
+
+	/* Destination object must be of type Reference */
+
+	if (dest_desc->common.type != INTERNAL_TYPE_REFERENCE) {
+		/* Destination is not an Reference */
+
+		return (AE_AML_OPERAND_TYPE);
+	}
+
+	/* Examine the Reference opcode */
+
+	switch (dest_desc->reference.op_code)
+	{
+
+	case AML_NAME_OP:
+
+		/*
+		 *  Storing into a Name
+		 */
+		delete_dest_desc = dest_desc;
+		status = acpi_aml_store_object_to_nte (val_desc, dest_desc->reference.object);
+
+		break;  /* Case Name_op */
+
+
+	case AML_INDEX_OP:
+
+		delete_dest_desc = dest_desc;
+
+		/*
+		 * Valid source value and destination reference pointer.
+		 *
+		 * ACPI Specification 1.0B section 15.2.3.4.2.13:
+		 * Destination should point to either a buffer or a package
+		 */
+
+		/*
+		 * Actually, storing to a package is not so simple.  The source must be
+		 * evaluated and converted to the type of the destination and then the
+		 * source is copied into the destination - we can't just point to the
+		 * source object.
+		 */
+		if (dest_desc->reference.target_type == ACPI_TYPE_PACKAGE) {
+			/*
+			 * The object at *(Dest_desc->Reference.Where) is the
+			 *  element within the package that is to be modified.
+			 */
+			tmp_desc = *(dest_desc->reference.where);
+			if (tmp_desc) {
+				/*
+				 * If the Destination element is a package, we will delete
+				 *  that object and construct a new one.
+				 *
+				 * TBD: [Investigate] Should both the src and dest be required
+				 *      to be packages?
+				 *       && (Val_desc->Common.Type == ACPI_TYPE_PACKAGE)
+				 */
+				if (tmp_desc->common.type == ACPI_TYPE_PACKAGE) {
+					/*
+					 * Take away the reference for being part of a package and
+					 * delete
+					 */
+					acpi_cm_remove_reference (tmp_desc);
+					acpi_cm_remove_reference (tmp_desc);
+
+					tmp_desc = NULL;
+				}
+			}
+
+			if (!tmp_desc) {
+				/*
+				 * If the Tmp_desc is NULL, that means an uninitialized package
+				 * has been used as a destination, therefore, we must create
+				 * the destination element to match the type of the source
+				 * element NOTE: Val_desc can be of any type.
+				 */
+				tmp_desc = acpi_cm_create_internal_object (val_desc->common.type);
+				if (!tmp_desc) {
+					status = AE_NO_MEMORY;
+					goto cleanup;
+				}
+
+				/*
+				 * If the source is a package, copy the source to the new dest
+				 */
+				if (ACPI_TYPE_PACKAGE == tmp_desc->common.type) {
+					status = acpi_aml_build_copy_internal_package_object (
+							 val_desc, tmp_desc);
+					if (ACPI_FAILURE (status)) {
+						acpi_cm_remove_reference (tmp_desc);
+						tmp_desc = NULL;
+						goto cleanup;
+					}
+				}
+
+				/*
+				 * Install the new descriptor into the package and add a
+				 * reference to the newly created descriptor for now being
+				 * part of the parent package
+				 */
+
+				*(dest_desc->reference.where) = tmp_desc;
+				acpi_cm_add_reference (tmp_desc);
+			}
+
+			if (ACPI_TYPE_PACKAGE != tmp_desc->common.type) {
+				/*
+				 * The destination element is not a package, so we need to
+				 * convert the contents of the source (Val_desc) and copy into
+				 * the destination (Tmp_desc)
+				 */
+				status = acpi_aml_store_object_to_object(val_desc, tmp_desc);
+				if (ACPI_FAILURE (status)) {
+					/*
+					 * An error occurrered when copying the internal object
+					 * so delete the reference.
+					 */
+					status = AE_AML_OPERAND_TYPE;
+				}
+			}
+
+			break;
+		}
+
+		/*
+		 * Check that the destination is a Buffer Field type
+		 */
+		if (dest_desc->reference.target_type != ACPI_TYPE_BUFFER_FIELD) {
+			status = AE_AML_OPERAND_TYPE;
+			break;
+		}
+
+		/*
+		 * Storing into a buffer at a location defined by an Index.
+		 *
+		 * Each 8-bit element of the source object is written to the
+		 * 8-bit Buffer Field of the Index destination object.
+		 */
+
+		/*
+		 * Set the Tmp_desc to the destination object and type check.
+		 */
+		tmp_desc = dest_desc->reference.object;
+
+		if (tmp_desc->common.type != ACPI_TYPE_BUFFER) {
+			status = AE_AML_OPERAND_TYPE;
+			break;
+		}
+
+		/*
+		 * The assignment of the individual elements will be slightly
+		 * different for each source type.
+		 */
+
+		switch (val_desc->common.type)
+		{
+		/*
+		 * If the type is Integer, the Length is 4.
+		 * This loop to assign each of the elements is somewhat
+		 *  backward because of the Big Endian-ness of IA-64
+		 */
+		case ACPI_TYPE_NUMBER:
+			length = 4;
+			for (i = length; i != 0; i--) {
+				value = (u8)(val_desc->number.value >> (MUL_8 (i - 1)));
+				tmp_desc->buffer.pointer[dest_desc->reference.offset] = value;
+			}
+			break;
+
+		/*
+		 * If the type is Buffer, the Length is in the structure.
+		 * Just loop through the elements and assign each one in turn.
+		 */
+		case ACPI_TYPE_BUFFER:
+			length = val_desc->buffer.length;
+			for (i = 0; i < length; i++) {
+				value = *(val_desc->buffer.pointer + i);
+				tmp_desc->buffer.pointer[dest_desc->reference.offset] = value;
+			}
+			break;
+
+		/*
+		 * If the type is String, the Length is in the structure.
+		 * Just loop through the elements and assign each one in turn.
+		 */
+		case ACPI_TYPE_STRING:
+			length = val_desc->string.length;
+			for (i = 0; i < length; i++) {
+				value = *(val_desc->string.pointer + i);
+				tmp_desc->buffer.pointer[dest_desc->reference.offset] = value;
+			}
+			break;
+
+		/*
+		 * If source is not a valid type so return an error.
+		 */
+		default:
+			status = AE_AML_OPERAND_TYPE;
+			break;
+		}
+
+		/*
+		 * If we had an error, break out of this case statement.
+		 */
+		if(AE_OK != status) {
+			break;
+		}
+
+		/*
+		 * Set the return pointer
+		 */
+		dest_desc = tmp_desc;
+
+		break;
+
+	case AML_ZERO_OP:
+	case AML_ONE_OP:
+	case AML_ONES_OP:
+
+		/*
+		 * Storing to a constant is a no-op -- see spec sec 15.2.3.3.1.
+		 * Delete the result descriptor.
+		 */
+
+		delete_dest_desc = dest_desc;
+		break;
+
+
+	case AML_LOCAL_OP:
+
+		status = acpi_ds_method_data_set_value (MTH_TYPE_LOCAL,
+				  (dest_desc->reference.offset), val_desc);
+		delete_dest_desc = dest_desc;
+		break;
+
+
+	case AML_ARG_OP:
+
+		status = acpi_ds_method_data_set_value (MTH_TYPE_ARG,
+				  (dest_desc->reference.offset), val_desc);
+		delete_dest_desc = dest_desc;
+		break;
+
+
+	case AML_DEBUG_OP:
+
+		/*
+		 * Storing to the Debug object causes the value stored to be
+		 * displayed and otherwise has no effect -- see sec. 15.2.3.3.3.
+		 */
+
+		delete_dest_desc = dest_desc;
+		break;
+
+
+	default:
+
+		/* TBD: [Restructure] use object dump routine !! */
+
+		delete_dest_desc = dest_desc;
+		status = AE_AML_INTERNAL;
+
+	}   /* switch(Dest_desc->Reference.Op_code) */
+
+
+cleanup:
+
+	/* Cleanup and exit*/
+
+	if (delete_dest_desc) {
+		acpi_cm_remove_reference (delete_dest_desc);
+	}
+
+	return (status);
+}
+
+