patch-2.4.6 linux/drivers/acpi/interpreter/amresolv.c

• Lines: 466
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.5/linux/drivers/acpi/interpreter/amresolv.c
• Orig date: Mon Jan 29 10:15:59 2001

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/interpreter/amresolv.c linux/drivers/acpi/interpreter/amresolv.c
@@ -1,465 +0,0 @@
-
-/******************************************************************************
- *
- * Module Name: amresolv - AML Interpreter object resolution
- *              $Revision: 81 $
- *
- *****************************************************************************/
-
-/*
- *  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 "amlcode.h"
-#include "acparser.h"
-#include "acdispat.h"
-#include "acinterp.h"
-#include "acnamesp.h"
-#include "actables.h"
-#include "acevents.h"
-
-
-#define _COMPONENT          INTERPRETER
-	 MODULE_NAME         ("amresolv")
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_aml_get_field_unit_value
- *
- * PARAMETERS:  *Field_desc         - Pointer to a Field_unit
- *              *Result_desc        - Pointer to an empty descriptor
- *                                    which will become a Number
- *                                    containing the field's value.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Retrieve the value from a Field_unit
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_aml_get_field_unit_value (
-	ACPI_OPERAND_OBJECT     *field_desc,
-	ACPI_OPERAND_OBJECT     *result_desc)
-{
-	ACPI_STATUS             status = AE_OK;
-	u32                     mask;
-	u8                      *location = NULL;
-	u8                      locked = FALSE;
-
-
-	if (!field_desc) {
-		status = AE_AML_NO_OPERAND;
-	}
-
-	if (!(field_desc->common.flags & AOPOBJ_DATA_VALID)) {
-		status = acpi_ds_get_field_unit_arguments (field_desc);
-		if (ACPI_FAILURE (status)) {
-			return (status);
-		}
-	}
-
-	if (!field_desc->field_unit.container) {
-		status = AE_AML_INTERNAL;
-	}
-
-	else if (ACPI_TYPE_BUFFER != field_desc->field_unit.container->common.type) {
-		status = AE_AML_OPERAND_TYPE;
-	}
-
-	else if (!result_desc) {
-		status = AE_AML_INTERNAL;
-	}
-
-	if (ACPI_FAILURE (status)) {
-		return (status);
-	}
-
-
-		/* Get the global lock if needed */
-
-	locked = acpi_aml_acquire_global_lock (field_desc->field_unit.lock_rule);
-
-	/* Field location is (base of buffer) + (byte offset) */
-
-	location = field_desc->field_unit.container->buffer.pointer
-			 + field_desc->field_unit.offset;
-
-	/*
-	 * Construct Mask with as many 1 bits as the field width
-	 *
-	 * NOTE: Only the bottom 5 bits are valid for a shift operation, so
-	 *  special care must be taken for any shift greater than 31 bits.
-	 *
-	 * TBD: [Unhandled] Fields greater than 32-bits will not work.
-	 */
-
-	if (field_desc->field_unit.length < 32) {
-		mask = ((u32) 1 << field_desc->field_unit.length) - (u32) 1;
-	}
-	else {
-		mask = ACPI_UINT32_MAX;
-	}
-
-	result_desc->integer.type = (u8) ACPI_TYPE_INTEGER;
-
-	/* Get the 32 bit value at the location */
-
-	MOVE_UNALIGNED32_TO_32 (&result_desc->integer.value, location);
-
-	/*
-	 * Shift the 32-bit word containing the field, and mask off the
-	 * resulting value
-	 */
-
-	result_desc->integer.value =
-		(result_desc->integer.value >> field_desc->field_unit.bit_offset) & mask;
-
-	/* Release global lock if we acquired it earlier */
-
-	acpi_aml_release_global_lock (locked);
-
-	return (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_aml_resolve_to_value
- *
- * PARAMETERS:  **Stack_ptr         - Points to entry on Obj_stack, which can
- *                                    be either an (ACPI_OPERAND_OBJECT  *)
- *                                    or an ACPI_HANDLE.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Convert Reference objects to values
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_aml_resolve_to_value (
-	ACPI_OPERAND_OBJECT     **stack_ptr,
-	ACPI_WALK_STATE         *walk_state)
-{
-	ACPI_STATUS             status = AE_OK;
-
-
-	if (!stack_ptr || !*stack_ptr) {
-		return (AE_AML_NO_OPERAND);
-	}
-
-
-	/*
-	 * The entity pointed to by the Stack_ptr can be either
-	 * 1) A valid ACPI_OPERAND_OBJECT, or
-	 * 2) A ACPI_NAMESPACE_NODE (Named_obj)
-	 */
-
-	if (VALID_DESCRIPTOR_TYPE (*stack_ptr, ACPI_DESC_TYPE_INTERNAL)) {
-
-		status = acpi_aml_resolve_object_to_value (stack_ptr, walk_state);
-		if (ACPI_FAILURE (status)) {
-			return (status);
-		}
-	}
-
-	/*
-	 * Object on the stack may have changed if Acpi_aml_resolve_object_to_value()
-	 * was called (i.e., we can't use an _else_ here.)
-	 */
-
-	if (VALID_DESCRIPTOR_TYPE (*stack_ptr, ACPI_DESC_TYPE_NAMED)) {
-		status = acpi_aml_resolve_node_to_value ((ACPI_NAMESPACE_NODE **) stack_ptr, walk_state);
-	}
-
-
-	return (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_aml_resolve_object_to_value
- *
- * PARAMETERS:  Stack_ptr       - Pointer to a stack location that contains a
- *                                ptr to an internal object.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Retrieve the value from an internal object.  The Reference type
- *              uses the associated AML opcode to determine the value.
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_aml_resolve_object_to_value (
-	ACPI_OPERAND_OBJECT     **stack_ptr,
-	ACPI_WALK_STATE         *walk_state)
-{
-	ACPI_OPERAND_OBJECT     *stack_desc;
-	ACPI_STATUS             status = AE_OK;
-	ACPI_HANDLE             temp_handle = NULL;
-	ACPI_OPERAND_OBJECT     *obj_desc = NULL;
-	u32                     index = 0;
-	u16                     opcode;
-
-
-	stack_desc = *stack_ptr;
-
-	/* This is an ACPI_OPERAND_OBJECT  */
-
-	switch (stack_desc->common.type)
-	{
-
-	case INTERNAL_TYPE_REFERENCE:
-
-		opcode = stack_desc->reference.op_code;
-
-		switch (opcode)
-		{
-
-		case AML_NAME_OP:
-
-			/*
-			 * Convert indirect name ptr to a direct name ptr.
-			 * Then, Acpi_aml_resolve_node_to_value can be used to get the value
-			 */
-
-			temp_handle = stack_desc->reference.object;
-
-			/* Delete the Reference Object */
-
-			acpi_cm_remove_reference (stack_desc);
-
-			/* Put direct name pointer onto stack and exit */
-
-			(*stack_ptr) = temp_handle;
-			status = AE_OK;
-			break;
-
-
-		case AML_LOCAL_OP:
-
-			index = stack_desc->reference.offset;
-
-			/*
-			 * Get the local from the method's state info
-			 * Note: this increments the local's object reference count
-			 */
-
-			status = acpi_ds_method_data_get_value (MTH_TYPE_LOCAL, index,
-					 walk_state, &obj_desc);
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-
-			/*
-			 * Now we can delete the original Reference Object and
-			 * replace it with the resolve value
-			 */
-
-			acpi_cm_remove_reference (stack_desc);
-			*stack_ptr = obj_desc;
-
-			if (ACPI_TYPE_INTEGER == obj_desc->common.type) {
-				/* Value is a Number */
-
-			}
-
-			break;
-
-
-		case AML_ARG_OP:
-
-			index = stack_desc->reference.offset;
-
-
-			/*
-			 * Get the argument from the method's state info
-			 * Note: this increments the object reference count
-			 */
-
-			status = acpi_ds_method_data_get_value (MTH_TYPE_ARG, index,
-					 walk_state, &obj_desc);
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-
-			/*
-			 * Now we can delete the original Reference Object and
-			 * replace it with the resolve value
-			 */
-
-			acpi_cm_remove_reference (stack_desc);
-			*stack_ptr = obj_desc;
-
-			if (ACPI_TYPE_INTEGER == obj_desc->common.type) {
-				/* Value is a Number */
-
-			}
-
-			break;
-
-
-		/*
-		 * TBD: [Restructure] These next three opcodes change the type of
-		 * the object, which is actually a no-no.
-		 */
-
-		case AML_ZERO_OP:
-
-			stack_desc->common.type = (u8) ACPI_TYPE_INTEGER;
-			stack_desc->integer.value = 0;
-			break;
-
-
-		case AML_ONE_OP:
-
-			stack_desc->common.type = (u8) ACPI_TYPE_INTEGER;
-			stack_desc->integer.value = 1;
-			break;
-
-
-		case AML_ONES_OP:
-
-			stack_desc->common.type = (u8) ACPI_TYPE_INTEGER;
-			stack_desc->integer.value = ACPI_INTEGER_MAX;
-
-			/* Truncate value if we are executing from a 32-bit ACPI table */
-
-			acpi_aml_truncate_for32bit_table (stack_desc, walk_state);
-			break;
-
-
-		case AML_INDEX_OP:
-
-			switch (stack_desc->reference.target_type)
-			{
-			case ACPI_TYPE_BUFFER_FIELD:
-
-				/* Just return - leave the Reference on the stack */
-				break;
-
-
-			case ACPI_TYPE_PACKAGE:
-				obj_desc = *stack_desc->reference.where;
-				if (obj_desc) {
-					/*
-					 * Valid obj descriptor, copy pointer to return value
-					 * (i.e., dereference the package index)
-					 * Delete the ref object, increment the returned object
-					 */
-					acpi_cm_remove_reference (stack_desc);
-					acpi_cm_add_reference (obj_desc);
-					*stack_ptr = obj_desc;
-				}
-
-				else {
-					/*
-					 * A NULL object descriptor means an unitialized element of
-					 * the package, can't deref it
-					 */
-
-					status = AE_AML_UNINITIALIZED_ELEMENT;
-				}
-				break;
-
-			default:
-				/* Invalid reference OBJ*/
-
-				status = AE_AML_INTERNAL;
-				break;
-			}
-
-			break;
-
-
-		case AML_DEBUG_OP:
-
-			/* Just leave the object as-is */
-			break;
-
-
-		default:
-
-			status = AE_AML_INTERNAL;
-
-		}   /* switch (Opcode) */
-
-
-		if (ACPI_FAILURE (status)) {
-			return (status);
-		}
-
-		break; /* case INTERNAL_TYPE_REFERENCE */
-
-
-	case ACPI_TYPE_FIELD_UNIT:
-
-		obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_ANY);
-		if (!obj_desc) {
-			/* Descriptor allocation failure  */
-
-			return (AE_NO_MEMORY);
-		}
-
-		status = acpi_aml_get_field_unit_value (stack_desc, obj_desc);
-		if (ACPI_FAILURE (status)) {
-			acpi_cm_remove_reference (obj_desc);
-			obj_desc = NULL;
-		}
-
-		*stack_ptr = (void *) obj_desc;
-		break;
-
-
-	case INTERNAL_TYPE_BANK_FIELD:
-
-		obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_ANY);
-		if (!obj_desc) {
-			/* Descriptor allocation failure */
-
-			return (AE_NO_MEMORY);
-		}
-
-		status = acpi_aml_get_field_unit_value (stack_desc, obj_desc);
-		if (ACPI_FAILURE (status)) {
-			acpi_cm_remove_reference (obj_desc);
-			obj_desc = NULL;
-		}
-
-		*stack_ptr = (void *) obj_desc;
-		break;
-
-
-	/* TBD: [Future] - may need to handle Index_field, and Def_field someday */
-
-	default:
-
-		break;
-
-	}   /* switch (Stack_desc->Common.Type) */
-
-
-	return (status);
-}
-
-