patch-2.4.6 linux/drivers/acpi/interpreter/amresnte.c
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- Lines: 510
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.5/linux/drivers/acpi/interpreter/amresnte.c
- Orig date:
Mon Jan 22 13:23:42 2001
diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/interpreter/amresnte.c linux/drivers/acpi/interpreter/amresnte.c
@@ -1,509 +0,0 @@
-
-/******************************************************************************
- *
- * Module Name: amresnte - AML Interpreter object resolution
- * $Revision: 27 $
- *
- *****************************************************************************/
-
-/*
- * 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 ("amresnte")
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_aml_resolve_node_to_value
- *
- * PARAMETERS: Stack_ptr - Pointer to a location on a stack that contains
- * a pointer to an Node
- *
- * RETURN: Status
- *
- * DESCRIPTION: Resolve a ACPI_NAMESPACE_NODE (Node,
- * A.K.A. a "direct name pointer")
- *
- * Note: for some of the data types, the pointer attached to the Node
- * can be either a pointer to an actual internal object or a pointer into the
- * AML stream itself. These types are currently:
- *
- * ACPI_TYPE_INTEGER
- * ACPI_TYPE_STRING
- * ACPI_TYPE_BUFFER
- * ACPI_TYPE_MUTEX
- * ACPI_TYPE_PACKAGE
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_aml_resolve_node_to_value (
- ACPI_NAMESPACE_NODE **stack_ptr,
- ACPI_WALK_STATE *walk_state)
-
-{
- ACPI_STATUS status = AE_OK;
- ACPI_OPERAND_OBJECT *val_desc = NULL;
- ACPI_OPERAND_OBJECT *obj_desc = NULL;
- ACPI_NAMESPACE_NODE *node;
- u8 *aml_pointer = NULL;
- OBJECT_TYPE_INTERNAL entry_type;
- u8 locked;
- u8 attached_aml_pointer = FALSE;
- u8 aml_opcode = 0;
- ACPI_INTEGER temp_val;
- OBJECT_TYPE_INTERNAL object_type;
-
-
- node = *stack_ptr;
-
-
- /*
- * The stack pointer is a "Direct name ptr", and points to a
- * a ACPI_NAMESPACE_NODE (Node). Get the pointer that is attached to
- * the Node.
- */
-
- val_desc = acpi_ns_get_attached_object ((ACPI_HANDLE) node);
- entry_type = acpi_ns_get_type ((ACPI_HANDLE) node);
-
- /*
- * The Val_desc attached to the Node can be either:
- * 1) An internal ACPI object
- * 2) A pointer into the AML stream (into one of the ACPI system tables)
- */
-
- if (acpi_tb_system_table_pointer (val_desc)) {
- attached_aml_pointer = TRUE;
- aml_opcode = *((u8 *) val_desc);
- aml_pointer = ((u8 *) val_desc) + 1;
-
- }
-
-
- /*
- * Several Entry_types do not require further processing, so
- * we will return immediately
- */
- /* Devices rarely have an attached object, return the Node
- * and Method locals and arguments have a pseudo-Node
- */
- if (entry_type == ACPI_TYPE_DEVICE ||
- (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
- {
- return (AE_OK);
- }
-
- if (!val_desc) {
- return (AE_AML_NO_OPERAND);
- }
-
- /*
- * Action is based on the type of the Node, which indicates the type
- * of the attached object or pointer
- */
- switch (entry_type)
- {
-
- case ACPI_TYPE_PACKAGE:
-
- if (attached_aml_pointer) {
- /*
- * This means that the package initialization is not parsed
- * -- should not happen
- */
- return (AE_NOT_IMPLEMENTED);
- }
-
- /* Val_desc is an internal object in all cases by the time we get here */
-
- if (ACPI_TYPE_PACKAGE != val_desc->common.type) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- /* Return an additional reference to the object */
-
- obj_desc = val_desc;
- acpi_cm_add_reference (obj_desc);
- break;
-
-
- case ACPI_TYPE_BUFFER:
-
- if (attached_aml_pointer) {
- /*
- * This means that the buffer initialization is not parsed
- * -- should not happen
- */
- return (AE_NOT_IMPLEMENTED);
- }
-
- /* Val_desc is an internal object in all cases by the time we get here */
-
- if (ACPI_TYPE_BUFFER != val_desc->common.type) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- /* Return an additional reference to the object */
-
- obj_desc = val_desc;
- acpi_cm_add_reference (obj_desc);
- break;
-
-
- case ACPI_TYPE_STRING:
-
- if (attached_aml_pointer) {
- /* Allocate a new string object */
-
- obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_STRING);
- if (!obj_desc) {
- return (AE_NO_MEMORY);
- }
-
- /* Init the internal object */
-
- obj_desc->string.pointer = (NATIVE_CHAR *) aml_pointer;
- obj_desc->string.length = STRLEN (obj_desc->string.pointer);
- }
-
- else {
- if (ACPI_TYPE_STRING != val_desc->common.type) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- /* Return an additional reference to the object */
-
- obj_desc = val_desc;
- acpi_cm_add_reference (obj_desc);
- }
-
- break;
-
-
- case ACPI_TYPE_INTEGER:
-
- /*
- * The Node has an attached internal object, make sure that it's a
- * number
- */
-
- if (ACPI_TYPE_INTEGER != val_desc->common.type) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- /* Return an additional reference to the object */
-
- obj_desc = val_desc;
- acpi_cm_add_reference (obj_desc);
- break;
-
-
- case INTERNAL_TYPE_DEF_FIELD:
-
- /*
- * TBD: [Investigate] Is this the correct solution?
- *
- * This section was extended to convert to generic buffer if
- * the return length is greater than 32 bits, but still allows
- * for returning a type Number for smaller values because the
- * caller can then apply arithmetic operators on those fields.
- *
- * XXX - Implementation limitation: Fields are implemented as type
- * XXX - Number, but they really are supposed to be type Buffer.
- * XXX - The two are interchangeable only for lengths <= 32 bits.
- */
- if(val_desc->field.length > 32) {
- object_type = ACPI_TYPE_BUFFER;
- }
- else {
- object_type = ACPI_TYPE_INTEGER;
- }
-
- /*
- * Create the destination buffer object and the buffer space.
- */
- obj_desc = acpi_cm_create_internal_object (object_type);
- if (!obj_desc) {
- return (AE_NO_MEMORY);
- }
-
- /*
- * Fill in the object specific details
- */
- if (ACPI_TYPE_BUFFER == object_type) {
- obj_desc->buffer.pointer = acpi_cm_callocate (val_desc->field.length);
- if (!obj_desc->buffer.pointer) {
- acpi_cm_remove_reference(obj_desc);
- return (AE_NO_MEMORY);
- }
-
- obj_desc->buffer.length = val_desc->field.length;
-
- status = acpi_aml_access_named_field (ACPI_READ, (ACPI_HANDLE) node,
- obj_desc->buffer.pointer, obj_desc->buffer.length);
-
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- }
- else {
- status = acpi_aml_access_named_field (ACPI_READ, (ACPI_HANDLE) node,
- &temp_val, sizeof (temp_val));
-
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- obj_desc->integer.value = temp_val;
- }
-
-
- break;
-
-
- case INTERNAL_TYPE_BANK_FIELD:
-
- if (attached_aml_pointer) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- if (INTERNAL_TYPE_BANK_FIELD != val_desc->common.type) {
- return (AE_AML_OPERAND_TYPE);
- }
-
-
- /* Get the global lock if needed */
-
- obj_desc = (ACPI_OPERAND_OBJECT *) *stack_ptr;
- locked = acpi_aml_acquire_global_lock (obj_desc->field_unit.lock_rule);
-
- /* Set Index value to select proper Data register */
- /* perform the update */
-
- status = acpi_aml_access_named_field (ACPI_WRITE,
- val_desc->bank_field.bank_select, &val_desc->bank_field.value,
- sizeof (val_desc->bank_field.value));
-
- acpi_aml_release_global_lock (locked);
-
-
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- /* Read Data value */
-
- status = acpi_aml_access_named_field (ACPI_READ,
- (ACPI_HANDLE) val_desc->bank_field.container,
- &temp_val, sizeof (temp_val));
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- /* Create an object for the result */
-
- obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_INTEGER);
- if (!obj_desc) {
- return (AE_NO_MEMORY);
- }
-
- obj_desc->integer.value = temp_val;
- break;
-
-
- case INTERNAL_TYPE_INDEX_FIELD:
-
- if (attached_aml_pointer) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- if (INTERNAL_TYPE_INDEX_FIELD != val_desc->common.type) {
- return (AE_AML_OPERAND_TYPE);
- }
-
-
- /* Set Index value to select proper Data register */
- /* Get the global lock if needed */
-
- obj_desc = (ACPI_OPERAND_OBJECT *) *stack_ptr;
- locked = acpi_aml_acquire_global_lock (obj_desc->field_unit.lock_rule);
-
- /* Perform the update */
-
- status = acpi_aml_access_named_field (ACPI_WRITE,
- val_desc->index_field.index, &val_desc->index_field.value,
- sizeof (val_desc->index_field.value));
-
- acpi_aml_release_global_lock (locked);
-
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- /* Read Data value */
-
- status = acpi_aml_access_named_field (ACPI_READ, val_desc->index_field.data,
- &temp_val, sizeof (temp_val));
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- /* Create an object for the result */
-
- obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_INTEGER);
- if (!obj_desc) {
- return (AE_NO_MEMORY);
- }
-
- obj_desc->integer.value = temp_val;
- break;
-
-
- case ACPI_TYPE_FIELD_UNIT:
-
- if (attached_aml_pointer) {
- return (AE_AML_OPERAND_TYPE);
- }
-
- if (val_desc->common.type != (u8) entry_type) {
- return (AE_AML_OPERAND_TYPE);
- break;
- }
-
- /* Create object for result */
-
- obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_ANY);
- if (!obj_desc) {
- return (AE_NO_MEMORY);
- }
-
- status = acpi_aml_get_field_unit_value (val_desc, obj_desc);
- if (ACPI_FAILURE (status)) {
- acpi_cm_remove_reference (obj_desc);
- return (status);
- }
-
- break;
-
-
- /*
- * For these objects, just return the object attached to the Node
- */
-
- case ACPI_TYPE_MUTEX:
- case ACPI_TYPE_METHOD:
- case ACPI_TYPE_POWER:
- case ACPI_TYPE_PROCESSOR:
- case ACPI_TYPE_THERMAL:
- case ACPI_TYPE_EVENT:
- case ACPI_TYPE_REGION:
-
-
- /* Return an additional reference to the object */
-
- obj_desc = val_desc;
- acpi_cm_add_reference (obj_desc);
- break;
-
-
- /* TYPE_Any is untyped, and thus there is no object associated with it */
-
- case ACPI_TYPE_ANY:
-
- return (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
- break;
-
-
- /*
- * The only named references allowed are named constants
- *
- * e.g. Name (\OSFL, Ones)
- */
- case INTERNAL_TYPE_REFERENCE:
-
- switch (val_desc->reference.op_code)
- {
-
- case AML_ZERO_OP:
-
- temp_val = 0;
- break;
-
-
- case AML_ONE_OP:
-
- temp_val = 1;
- break;
-
-
- case AML_ONES_OP:
-
- temp_val = ACPI_INTEGER_MAX;
- break;
-
-
- default:
-
- return (AE_AML_BAD_OPCODE);
- }
-
- /* Create object for result */
-
- obj_desc = acpi_cm_create_internal_object (ACPI_TYPE_INTEGER);
- if (!obj_desc) {
- return (AE_NO_MEMORY);
- }
-
- obj_desc->integer.value = temp_val;
-
- /* Truncate value if we are executing from a 32-bit ACPI table */
-
- acpi_aml_truncate_for32bit_table (obj_desc, walk_state);
- break;
-
-
- /* Default case is for unknown types */
-
- default:
-
- return (AE_AML_OPERAND_TYPE);
-
- } /* switch (Entry_type) */
-
-
- /* Put the object descriptor on the stack */
-
- *stack_ptr = (void *) obj_desc;
-
- return (status);
-}
-
-
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