utcopy.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:20k
- /******************************************************************************
- *
- * Module Name: utcopy - Internal to external object translation utilities
- * $Revision: 83 $
- *
- *****************************************************************************/
- /*
- * 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 "acnamesp.h"
- #include "amlcode.h"
- #define _COMPONENT ACPI_UTILITIES
- MODULE_NAME ("utcopy")
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_isimple_to_esimple
- *
- * PARAMETERS: *Internal_object - Pointer to the object we are examining
- * *Buffer - Where the object is returned
- * *Space_used - Where the data length is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to place a simple object in a user
- * buffer.
- *
- * The buffer is assumed to have sufficient space for the object.
- *
- ******************************************************************************/
- static acpi_status
- acpi_ut_copy_isimple_to_esimple (
- acpi_operand_object *internal_object,
- acpi_object *external_object,
- u8 *data_space,
- u32 *buffer_space_used)
- {
- u32 length = 0;
- acpi_status status = AE_OK;
- FUNCTION_TRACE ("Ut_copy_isimple_to_esimple");
- /*
- * Check for NULL object case (could be an uninitialized
- * package element
- */
- if (!internal_object) {
- *buffer_space_used = 0;
- return_ACPI_STATUS (AE_OK);
- }
- /* Always clear the external object */
- MEMSET (external_object, 0, sizeof (acpi_object));
- /*
- * In general, the external object will be the same type as
- * the internal object
- */
- external_object->type = internal_object->common.type;
- /* However, only a limited number of external types are supported */
- switch (internal_object->common.type) {
- case ACPI_TYPE_STRING:
- length = internal_object->string.length + 1;
- external_object->string.length = internal_object->string.length;
- external_object->string.pointer = (NATIVE_CHAR *) data_space;
- MEMCPY ((void *) data_space, (void *) internal_object->string.pointer, length);
- break;
- case ACPI_TYPE_BUFFER:
- length = internal_object->buffer.length;
- external_object->buffer.length = internal_object->buffer.length;
- external_object->buffer.pointer = data_space;
- MEMCPY ((void *) data_space, (void *) internal_object->buffer.pointer, length);
- break;
- case ACPI_TYPE_INTEGER:
- external_object->integer.value= internal_object->integer.value;
- break;
- case INTERNAL_TYPE_REFERENCE:
- /*
- * This is an object reference. Attempt to dereference it.
- */
- switch (internal_object->reference.opcode) {
- case AML_ZERO_OP:
- external_object->type = ACPI_TYPE_INTEGER;
- external_object->integer.value = 0;
- break;
- case AML_ONE_OP:
- external_object->type = ACPI_TYPE_INTEGER;
- external_object->integer.value = 1;
- break;
- case AML_ONES_OP:
- external_object->type = ACPI_TYPE_INTEGER;
- external_object->integer.value = ACPI_INTEGER_MAX;
- break;
- case AML_REVISION_OP:
- external_object->type = ACPI_TYPE_INTEGER;
- external_object->integer.value = ACPI_CA_SUPPORT_LEVEL;
- break;
- case AML_INT_NAMEPATH_OP:
- /*
- * This is a named reference, get the string. We already know that
- * we have room for it, use max length
- */
- length = MAX_STRING_LENGTH;
- external_object->type = ACPI_TYPE_STRING;
- external_object->string.pointer = (NATIVE_CHAR *) data_space;
- status = acpi_ns_handle_to_pathname ((acpi_handle *) internal_object->reference.node,
- &length, (char *) data_space);
- /* Converted (external) string length is returned from above */
- external_object->string.length = length;
- break;
- default:
- /*
- * Use the object type of "Any" to indicate a reference
- * to object containing a handle to an ACPI named object.
- */
- external_object->type = ACPI_TYPE_ANY;
- external_object->reference.handle = internal_object->reference.node;
- break;
- }
- break;
- case ACPI_TYPE_PROCESSOR:
- external_object->processor.proc_id = internal_object->processor.proc_id;
- external_object->processor.pblk_address = internal_object->processor.address;
- external_object->processor.pblk_length = internal_object->processor.length;
- break;
- case ACPI_TYPE_POWER:
- external_object->power_resource.system_level =
- internal_object->power_resource.system_level;
- external_object->power_resource.resource_order =
- internal_object->power_resource.resource_order;
- break;
- default:
- /*
- * There is no corresponding external object type
- */
- return_ACPI_STATUS (AE_SUPPORT);
- break;
- }
- *buffer_space_used = (u32) ROUND_UP_TO_NATIVE_WORD (length);
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_ielement_to_eelement
- *
- * PARAMETERS: ACPI_PKG_CALLBACK
- *
- * RETURN: Status
- *
- * DESCRIPTION: Copy one package element to another package element
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_copy_ielement_to_eelement (
- u8 object_type,
- acpi_operand_object *source_object,
- acpi_generic_state *state,
- void *context)
- {
- acpi_status status = AE_OK;
- acpi_pkg_info *info = (acpi_pkg_info *) context;
- u32 object_space;
- u32 this_index;
- acpi_object *target_object;
- FUNCTION_ENTRY ();
- this_index = state->pkg.index;
- target_object = (acpi_object *)
- &((acpi_object *)(state->pkg.dest_object))->package.elements[this_index];
- switch (object_type) {
- case ACPI_COPY_TYPE_SIMPLE:
- /*
- * This is a simple or null object -- get the size
- */
- status = acpi_ut_copy_isimple_to_esimple (source_object,
- target_object, info->free_space, &object_space);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- break;
- case ACPI_COPY_TYPE_PACKAGE:
- /*
- * Build the package object
- */
- target_object->type = ACPI_TYPE_PACKAGE;
- target_object->package.count = source_object->package.count;
- target_object->package.elements = (acpi_object *) info->free_space;
- /*
- * Pass the new package object back to the package walk routine
- */
- state->pkg.this_target_obj = target_object;
- /*
- * Save space for the array of objects (Package elements)
- * update the buffer length counter
- */
- object_space = (u32) ROUND_UP_TO_NATIVE_WORD (
- target_object->package.count * sizeof (acpi_object));
- break;
- default:
- return (AE_BAD_PARAMETER);
- }
- info->free_space += object_space;
- info->length += object_space;
- return (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_ipackage_to_epackage
- *
- * PARAMETERS: *Internal_object - Pointer to the object we are returning
- * *Buffer - Where the object is returned
- * *Space_used - Where the object length is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to place a package object in a user
- * buffer. A package object by definition contains other objects.
- *
- * The buffer is assumed to have sufficient space for the object.
- * The caller must have verified the buffer length needed using the
- * Acpi_ut_get_object_size function before calling this function.
- *
- ******************************************************************************/
- static acpi_status
- acpi_ut_copy_ipackage_to_epackage (
- acpi_operand_object *internal_object,
- u8 *buffer,
- u32 *space_used)
- {
- acpi_object *external_object;
- acpi_status status;
- acpi_pkg_info info;
- FUNCTION_TRACE ("Ut_copy_ipackage_to_epackage");
- /*
- * First package at head of the buffer
- */
- external_object = (acpi_object *) buffer;
- /*
- * Free space begins right after the first package
- */
- info.length = 0;
- info.object_space = 0;
- info.num_packages = 1;
- info.free_space = buffer + ROUND_UP_TO_NATIVE_WORD (sizeof (acpi_object));
- external_object->type = internal_object->common.type;
- external_object->package.count = internal_object->package.count;
- external_object->package.elements = (acpi_object *) info.free_space;
- /*
- * Build an array of ACPI_OBJECTS in the buffer
- * and move the free space past it
- */
- info.free_space += external_object->package.count *
- ROUND_UP_TO_NATIVE_WORD (sizeof (acpi_object));
- status = acpi_ut_walk_package_tree (internal_object, external_object,
- acpi_ut_copy_ielement_to_eelement, &info);
- *space_used = info.length;
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_iobject_to_eobject
- *
- * PARAMETERS: *Internal_object - The internal object to be converted
- * *Buffer_ptr - Where the object is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to build an API object to be returned to
- * the caller.
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_copy_iobject_to_eobject (
- acpi_operand_object *internal_object,
- acpi_buffer *ret_buffer)
- {
- acpi_status status;
- FUNCTION_TRACE ("Ut_copy_iobject_to_eobject");
- if (IS_THIS_OBJECT_TYPE (internal_object, ACPI_TYPE_PACKAGE)) {
- /*
- * Package object: Copy all subobjects (including
- * nested packages)
- */
- status = acpi_ut_copy_ipackage_to_epackage (internal_object,
- ret_buffer->pointer, &ret_buffer->length);
- }
- else {
- /*
- * Build a simple object (no nested objects)
- */
- status = acpi_ut_copy_isimple_to_esimple (internal_object,
- (acpi_object *) ret_buffer->pointer,
- ((u8 *) ret_buffer->pointer +
- ROUND_UP_TO_NATIVE_WORD (sizeof (acpi_object))),
- &ret_buffer->length);
- /*
- * build simple does not include the object size in the length
- * so we add it in here
- */
- ret_buffer->length += sizeof (acpi_object);
- }
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_esimple_to_isimple
- *
- * PARAMETERS: *External_object - The external object to be converted
- * *Internal_object - Where the internal object is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function copies an external object to an internal one.
- * NOTE: Pointers can be copied, we don't need to copy data.
- * (The pointers have to be valid in our address space no matter
- * what we do with them!)
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_copy_esimple_to_isimple (
- acpi_object *external_object,
- acpi_operand_object **ret_internal_object)
- {
- acpi_operand_object *internal_object;
- FUNCTION_TRACE ("Ut_copy_esimple_to_isimple");
- /*
- * Simple types supported are: String, Buffer, Integer
- */
- switch (external_object->type) {
- case ACPI_TYPE_STRING:
- case ACPI_TYPE_BUFFER:
- case ACPI_TYPE_INTEGER:
- internal_object = acpi_ut_create_internal_object ((u8) external_object->type);
- if (!internal_object) {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
- break;
- default:
- /*
- * Whatever other type -- it is not supported
- */
- return_ACPI_STATUS (AE_SUPPORT);
- break;
- }
- switch (external_object->type) {
- /* Must COPY string and buffer contents */
- case ACPI_TYPE_STRING:
- internal_object->string.pointer = ACPI_MEM_CALLOCATE (external_object->string.length + 1);
- if (!internal_object->string.pointer) {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
- MEMCPY (internal_object->string.pointer,
- external_object->string.pointer,
- external_object->string.length);
- internal_object->string.length = external_object->string.length;
- break;
- case ACPI_TYPE_BUFFER:
- internal_object->buffer.pointer = ACPI_MEM_CALLOCATE (external_object->buffer.length);
- if (!internal_object->buffer.pointer) {
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
- MEMCPY (internal_object->buffer.pointer,
- external_object->buffer.pointer,
- external_object->buffer.length);
- internal_object->buffer.length = external_object->buffer.length;
- break;
- case ACPI_TYPE_INTEGER:
- internal_object->integer.value = external_object->integer.value;
- break;
- }
- *ret_internal_object = internal_object;
- return_ACPI_STATUS (AE_OK);
- }
- #ifdef ACPI_FUTURE_IMPLEMENTATION
- /* Code to convert packages that are parameters to control methods */
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_epackage_to_ipackage
- *
- * PARAMETERS: *Internal_object - Pointer to the object we are returning
- * *Buffer - Where the object is returned
- * *Space_used - Where the length of the object is returned
- *
- * RETURN: Status - the status of the call
- *
- * DESCRIPTION: This function is called to place a package object in a user
- * buffer. A package object by definition contains other objects.
- *
- * The buffer is assumed to have sufficient space for the object.
- * The caller must have verified the buffer length needed using the
- * Acpi_ut_get_object_size function before calling this function.
- *
- ******************************************************************************/
- static acpi_status
- acpi_ut_copy_epackage_to_ipackage (
- acpi_operand_object *internal_object,
- u8 *buffer,
- u32 *space_used)
- {
- u8 *free_space;
- acpi_object *external_object;
- u32 length = 0;
- u32 this_index;
- u32 object_space = 0;
- acpi_operand_object *this_internal_obj;
- acpi_object *this_external_obj;
- FUNCTION_TRACE ("Ut_copy_epackage_to_ipackage");
- /*
- * First package at head of the buffer
- */
- external_object = (acpi_object *)buffer;
- /*
- * Free space begins right after the first package
- */
- free_space = buffer + sizeof(acpi_object);
- external_object->type = internal_object->common.type;
- external_object->package.count = internal_object->package.count;
- external_object->package.elements = (acpi_object *)free_space;
- /*
- * Build an array of ACPI_OBJECTS in the buffer
- * and move the free space past it
- */
- free_space += external_object->package.count * sizeof(acpi_object);
- /* Call Walk_package */
- }
- #endif /* Future implementation */
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_eobject_to_iobject
- *
- * PARAMETERS: *Internal_object - The external object to be converted
- * *Buffer_ptr - Where the internal object is returned
- *
- * RETURN: Status - the status of the call
- *
- * DESCRIPTION: Converts an external object to an internal object.
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_copy_eobject_to_iobject (
- acpi_object *external_object,
- acpi_operand_object **internal_object)
- {
- acpi_status status;
- FUNCTION_TRACE ("Ut_copy_eobject_to_iobject");
- if (external_object->type == ACPI_TYPE_PACKAGE) {
- /*
- * Package objects contain other objects (which can be objects)
- * buildpackage does it all
- *
- * TBD: Package conversion must be completed and tested
- * NOTE: this code converts packages as input parameters to
- * control methods only. This is a very, very rare case.
- */
- /*
- Status = Acpi_ut_copy_epackage_to_ipackage(Internal_object,
- Ret_buffer->Pointer,
- &Ret_buffer->Length);
- */
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Packages as parameters not implemented!n"));
- return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
- }
- else {
- /*
- * Build a simple object (no nested objects)
- */
- status = acpi_ut_copy_esimple_to_isimple (external_object, internal_object);
- }
- return_ACPI_STATUS (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_ielement_to_ielement
- *
- * PARAMETERS: ACPI_PKG_CALLBACK
- *
- * RETURN: Status - the status of the call
- *
- * DESCRIPTION: Copy one package element to another package element
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_copy_ielement_to_ielement (
- u8 object_type,
- acpi_operand_object *source_object,
- acpi_generic_state *state,
- void *context)
- {
- acpi_status status = AE_OK;
- u32 this_index;
- acpi_operand_object **this_target_ptr;
- acpi_operand_object *target_object;
- FUNCTION_ENTRY ();
- this_index = state->pkg.index;
- this_target_ptr = (acpi_operand_object **)
- &state->pkg.dest_object->package.elements[this_index];
- switch (object_type) {
- case 0:
- /*
- * This is a simple object, just copy it
- */
- target_object = acpi_ut_create_internal_object (source_object->common.type);
- if (!target_object) {
- return (AE_NO_MEMORY);
- }
- status = acpi_ex_store_object_to_object (source_object, target_object,
- (acpi_walk_state *) context);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- *this_target_ptr = target_object;
- break;
- case 1:
- /*
- * This object is a package - go down another nesting level
- * Create and build the package object
- */
- target_object = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE);
- if (!target_object) {
- /* TBD: must delete package created up to this point */
- return (AE_NO_MEMORY);
- }
- target_object->package.count = source_object->package.count;
- /*
- * Pass the new package object back to the package walk routine
- */
- state->pkg.this_target_obj = target_object;
- /*
- * Store the object pointer in the parent package object
- */
- *this_target_ptr = target_object;
- break;
- default:
- return (AE_BAD_PARAMETER);
- }
- return (status);
- }
- /*******************************************************************************
- *
- * FUNCTION: Acpi_ut_copy_ipackage_to_ipackage
- *
- * PARAMETERS: *Source_obj - Pointer to the source package object
- * *Dest_obj - Where the internal object is returned
- *
- * RETURN: Status - the status of the call
- *
- * DESCRIPTION: This function is called to copy an internal package object
- * into another internal package object.
- *
- ******************************************************************************/
- acpi_status
- acpi_ut_copy_ipackage_to_ipackage (
- acpi_operand_object *source_obj,
- acpi_operand_object *dest_obj,
- acpi_walk_state *walk_state)
- {
- acpi_status status = AE_OK;
- FUNCTION_TRACE ("Ut_copy_ipackage_to_ipackage");
- dest_obj->common.type = source_obj->common.type;
- dest_obj->package.count = source_obj->package.count;
- /*
- * Create the object array and walk the source package tree
- */
- dest_obj->package.elements = ACPI_MEM_CALLOCATE ((source_obj->package.count + 1) *
- sizeof (void *));
- dest_obj->package.next_element = dest_obj->package.elements;
- if (!dest_obj->package.elements) {
- REPORT_ERROR (
- ("Aml_build_copy_internal_package_object: Package allocation failuren"));
- return_ACPI_STATUS (AE_NO_MEMORY);
- }
- status = acpi_ut_walk_package_tree (source_obj, dest_obj,
- acpi_ut_copy_ielement_to_ielement, walk_state);
- return_ACPI_STATUS (status);
- }