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authorLen Brown <len.brown@intel.com>2009-01-09 00:13:17 -0500
committerLen Brown <len.brown@intel.com>2009-01-09 03:30:47 -0500
commit95b482a8d31116f3f5c2a5089569393234d06385 (patch)
treef32aec8673a285a9d188948be97af3034ee06e93 /drivers/acpi/namespace/nsutils.c
parent6620e0c49f577454b772fb381543d60ae53eb885 (diff)
ACPICA: create acpica/ directory
also, delete sleep/ and delete ACPI_CFLAGS from Makefile Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/namespace/nsutils.c')
-rw-r--r--drivers/acpi/namespace/nsutils.c997
1 files changed, 0 insertions, 997 deletions
diff --git a/drivers/acpi/namespace/nsutils.c b/drivers/acpi/namespace/nsutils.c
deleted file mode 100644
index a443d2805d2c..000000000000
--- a/drivers/acpi/namespace/nsutils.c
+++ /dev/null
@@ -1,997 +0,0 @@
-/******************************************************************************
- *
- * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
- * parents and siblings and Scope manipulation
- *
- *****************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2008, Intel Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- */
-
-#include <acpi/acpi.h>
-#include <acpi/accommon.h>
-#include <acpi/acnamesp.h>
-#include <acpi/amlcode.h>
-#include <acpi/actables.h>
-
-#define _COMPONENT ACPI_NAMESPACE
-ACPI_MODULE_NAME("nsutils")
-
-/* Local prototypes */
-static u8 acpi_ns_valid_path_separator(char sep);
-
-#ifdef ACPI_OBSOLETE_FUNCTIONS
-acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search);
-#endif
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_report_error
- *
- * PARAMETERS: module_name - Caller's module name (for error output)
- * line_number - Caller's line number (for error output)
- * internal_name - Name or path of the namespace node
- * lookup_status - Exception code from NS lookup
- *
- * RETURN: None
- *
- * DESCRIPTION: Print warning message with full pathname
- *
- ******************************************************************************/
-
-void
-acpi_ns_report_error(const char *module_name,
- u32 line_number,
- const char *internal_name, acpi_status lookup_status)
-{
- acpi_status status;
- u32 bad_name;
- char *name = NULL;
-
- acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);
-
- if (lookup_status == AE_BAD_CHARACTER) {
-
- /* There is a non-ascii character in the name */
-
- ACPI_MOVE_32_TO_32(&bad_name, internal_name);
- acpi_os_printf("[0x%4.4X] (NON-ASCII)", bad_name);
- } else {
- /* Convert path to external format */
-
- status = acpi_ns_externalize_name(ACPI_UINT32_MAX,
- internal_name, NULL, &name);
-
- /* Print target name */
-
- if (ACPI_SUCCESS(status)) {
- acpi_os_printf("[%s]", name);
- } else {
- acpi_os_printf("[COULD NOT EXTERNALIZE NAME]");
- }
-
- if (name) {
- ACPI_FREE(name);
- }
- }
-
- acpi_os_printf(" Namespace lookup failure, %s\n",
- acpi_format_exception(lookup_status));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_report_method_error
- *
- * PARAMETERS: module_name - Caller's module name (for error output)
- * line_number - Caller's line number (for error output)
- * Message - Error message to use on failure
- * prefix_node - Prefix relative to the path
- * Path - Path to the node (optional)
- * method_status - Execution status
- *
- * RETURN: None
- *
- * DESCRIPTION: Print warning message with full pathname
- *
- ******************************************************************************/
-
-void
-acpi_ns_report_method_error(const char *module_name,
- u32 line_number,
- const char *message,
- struct acpi_namespace_node *prefix_node,
- const char *path, acpi_status method_status)
-{
- acpi_status status;
- struct acpi_namespace_node *node = prefix_node;
-
- acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);
-
- if (path) {
- status =
- acpi_ns_get_node(prefix_node, path, ACPI_NS_NO_UPSEARCH,
- &node);
- if (ACPI_FAILURE(status)) {
- acpi_os_printf("[Could not get node by pathname]");
- }
- }
-
- acpi_ns_print_node_pathname(node, message);
- acpi_os_printf(", %s\n", acpi_format_exception(method_status));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_print_node_pathname
- *
- * PARAMETERS: Node - Object
- * Message - Prefix message
- *
- * DESCRIPTION: Print an object's full namespace pathname
- * Manages allocation/freeing of a pathname buffer
- *
- ******************************************************************************/
-
-void
-acpi_ns_print_node_pathname(struct acpi_namespace_node *node,
- const char *message)
-{
- struct acpi_buffer buffer;
- acpi_status status;
-
- if (!node) {
- acpi_os_printf("[NULL NAME]");
- return;
- }
-
- /* Convert handle to full pathname and print it (with supplied message) */
-
- buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
-
- status = acpi_ns_handle_to_pathname(node, &buffer);
- if (ACPI_SUCCESS(status)) {
- if (message) {
- acpi_os_printf("%s ", message);
- }
-
- acpi_os_printf("[%s] (Node %p)", (char *)buffer.pointer, node);
- ACPI_FREE(buffer.pointer);
- }
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_valid_root_prefix
- *
- * PARAMETERS: Prefix - Character to be checked
- *
- * RETURN: TRUE if a valid prefix
- *
- * DESCRIPTION: Check if a character is a valid ACPI Root prefix
- *
- ******************************************************************************/
-
-u8 acpi_ns_valid_root_prefix(char prefix)
-{
-
- return ((u8) (prefix == '\\'));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_valid_path_separator
- *
- * PARAMETERS: Sep - Character to be checked
- *
- * RETURN: TRUE if a valid path separator
- *
- * DESCRIPTION: Check if a character is a valid ACPI path separator
- *
- ******************************************************************************/
-
-static u8 acpi_ns_valid_path_separator(char sep)
-{
-
- return ((u8) (sep == '.'));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_get_type
- *
- * PARAMETERS: Node - Parent Node to be examined
- *
- * RETURN: Type field from Node whose handle is passed
- *
- * DESCRIPTION: Return the type of a Namespace node
- *
- ******************************************************************************/
-
-acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
-{
- ACPI_FUNCTION_TRACE(ns_get_type);
-
- if (!node) {
- ACPI_WARNING((AE_INFO, "Null Node parameter"));
- return_UINT32(ACPI_TYPE_ANY);
- }
-
- return_UINT32((acpi_object_type) node->type);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_local
- *
- * PARAMETERS: Type - A namespace object type
- *
- * RETURN: LOCAL if names must be found locally in objects of the
- * passed type, 0 if enclosing scopes should be searched
- *
- * DESCRIPTION: Returns scope rule for the given object type.
- *
- ******************************************************************************/
-
-u32 acpi_ns_local(acpi_object_type type)
-{
- ACPI_FUNCTION_TRACE(ns_local);
-
- if (!acpi_ut_valid_object_type(type)) {
-
- /* Type code out of range */
-
- ACPI_WARNING((AE_INFO, "Invalid Object Type %X", type));
- return_UINT32(ACPI_NS_NORMAL);
- }
-
- return_UINT32((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_get_internal_name_length
- *
- * PARAMETERS: Info - Info struct initialized with the
- * external name pointer.
- *
- * RETURN: None
- *
- * DESCRIPTION: Calculate the length of the internal (AML) namestring
- * corresponding to the external (ASL) namestring.
- *
- ******************************************************************************/
-
-void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info)
-{
- const char *next_external_char;
- u32 i;
-
- ACPI_FUNCTION_ENTRY();
-
- next_external_char = info->external_name;
- info->num_carats = 0;
- info->num_segments = 0;
- info->fully_qualified = FALSE;
-
- /*
- * For the internal name, the required length is 4 bytes per segment, plus
- * 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null
- * (which is not really needed, but no there's harm in putting it there)
- *
- * strlen() + 1 covers the first name_seg, which has no path separator
- */
- if (acpi_ns_valid_root_prefix(*next_external_char)) {
- info->fully_qualified = TRUE;
- next_external_char++;
-
- /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */
-
- while (acpi_ns_valid_root_prefix(*next_external_char)) {
- next_external_char++;
- }
- } else {
- /*
- * Handle Carat prefixes
- */
- while (*next_external_char == '^') {
- info->num_carats++;
- next_external_char++;
- }
- }
-
- /*
- * Determine the number of ACPI name "segments" by counting the number of
- * path separators within the string. Start with one segment since the
- * segment count is [(# separators) + 1], and zero separators is ok.
- */
- if (*next_external_char) {
- info->num_segments = 1;
- for (i = 0; next_external_char[i]; i++) {
- if (acpi_ns_valid_path_separator(next_external_char[i])) {
- info->num_segments++;
- }
- }
- }
-
- info->length = (ACPI_NAME_SIZE * info->num_segments) +
- 4 + info->num_carats;
-
- info->next_external_char = next_external_char;
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_build_internal_name
- *
- * PARAMETERS: Info - Info struct fully initialized
- *
- * RETURN: Status
- *
- * DESCRIPTION: Construct the internal (AML) namestring
- * corresponding to the external (ASL) namestring.
- *
- ******************************************************************************/
-
-acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
-{
- u32 num_segments = info->num_segments;
- char *internal_name = info->internal_name;
- const char *external_name = info->next_external_char;
- char *result = NULL;
- u32 i;
-
- ACPI_FUNCTION_TRACE(ns_build_internal_name);
-
- /* Setup the correct prefixes, counts, and pointers */
-
- if (info->fully_qualified) {
- internal_name[0] = '\\';
-
- if (num_segments <= 1) {
- result = &internal_name[1];
- } else if (num_segments == 2) {
- internal_name[1] = AML_DUAL_NAME_PREFIX;
- result = &internal_name[2];
- } else {
- internal_name[1] = AML_MULTI_NAME_PREFIX_OP;
- internal_name[2] = (char)num_segments;
- result = &internal_name[3];
- }
- } else {
- /*
- * Not fully qualified.
- * Handle Carats first, then append the name segments
- */
- i = 0;
- if (info->num_carats) {
- for (i = 0; i < info->num_carats; i++) {
- internal_name[i] = '^';
- }
- }
-
- if (num_segments <= 1) {
- result = &internal_name[i];
- } else if (num_segments == 2) {
- internal_name[i] = AML_DUAL_NAME_PREFIX;
- result = &internal_name[(acpi_size) i + 1];
- } else {
- internal_name[i] = AML_MULTI_NAME_PREFIX_OP;
- internal_name[(acpi_size) i + 1] = (char)num_segments;
- result = &internal_name[(acpi_size) i + 2];
- }
- }
-
- /* Build the name (minus path separators) */
-
- for (; num_segments; num_segments--) {
- for (i = 0; i < ACPI_NAME_SIZE; i++) {
- if (acpi_ns_valid_path_separator(*external_name) ||
- (*external_name == 0)) {
-
- /* Pad the segment with underscore(s) if segment is short */
-
- result[i] = '_';
- } else {
- /* Convert the character to uppercase and save it */
-
- result[i] =
- (char)ACPI_TOUPPER((int)*external_name);
- external_name++;
- }
- }
-
- /* Now we must have a path separator, or the pathname is bad */
-
- if (!acpi_ns_valid_path_separator(*external_name) &&
- (*external_name != 0)) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
-
- /* Move on the next segment */
-
- external_name++;
- result += ACPI_NAME_SIZE;
- }
-
- /* Terminate the string */
-
- *result = 0;
-
- if (info->fully_qualified) {
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "Returning [%p] (abs) \"\\%s\"\n",
- internal_name, internal_name));
- } else {
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
- internal_name, internal_name));
- }
-
- return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_internalize_name
- *
- * PARAMETERS: *external_name - External representation of name
- * **Converted Name - Where to return the resulting
- * internal represention of the name
- *
- * RETURN: Status
- *
- * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
- * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
- *
- *******************************************************************************/
-
-acpi_status
-acpi_ns_internalize_name(const char *external_name, char **converted_name)
-{
- char *internal_name;
- struct acpi_namestring_info info;
- acpi_status status;
-
- ACPI_FUNCTION_TRACE(ns_internalize_name);
-
- if ((!external_name) || (*external_name == 0) || (!converted_name)) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
-
- /* Get the length of the new internal name */
-
- info.external_name = external_name;
- acpi_ns_get_internal_name_length(&info);
-
- /* We need a segment to store the internal name */
-
- internal_name = ACPI_ALLOCATE_ZEROED(info.length);
- if (!internal_name) {
- return_ACPI_STATUS(AE_NO_MEMORY);
- }
-
- /* Build the name */
-
- info.internal_name = internal_name;
- status = acpi_ns_build_internal_name(&info);
- if (ACPI_FAILURE(status)) {
- ACPI_FREE(internal_name);
- return_ACPI_STATUS(status);
- }
-
- *converted_name = internal_name;
- return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_externalize_name
- *
- * PARAMETERS: internal_name_length - Lenth of the internal name below
- * internal_name - Internal representation of name
- * converted_name_length - Where the length is returned
- * converted_name - Where the resulting external name
- * is returned
- *
- * RETURN: Status
- *
- * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
- * to its external (printable) form (e.g. "\_PR_.CPU0")
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ns_externalize_name(u32 internal_name_length,
- const char *internal_name,
- u32 * converted_name_length, char **converted_name)
-{
- u32 names_index = 0;
- u32 num_segments = 0;
- u32 required_length;
- u32 prefix_length = 0;
- u32 i = 0;
- u32 j = 0;
-
- ACPI_FUNCTION_TRACE(ns_externalize_name);
-
- if (!internal_name_length || !internal_name || !converted_name) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
-
- /*
- * Check for a prefix (one '\' | one or more '^').
- */
- switch (internal_name[0]) {
- case '\\':
- prefix_length = 1;
- break;
-
- case '^':
- for (i = 0; i < internal_name_length; i++) {
- if (internal_name[i] == '^') {
- prefix_length = i + 1;
- } else {
- break;
- }
- }
-
- if (i == internal_name_length) {
- prefix_length = i;
- }
-
- break;
-
- default:
- break;
- }
-
- /*
- * Check for object names. Note that there could be 0-255 of these
- * 4-byte elements.
- */
- if (prefix_length < internal_name_length) {
- switch (internal_name[prefix_length]) {
- case AML_MULTI_NAME_PREFIX_OP:
-
- /* <count> 4-byte names */
-
- names_index = prefix_length + 2;
- num_segments = (u8)
- internal_name[(acpi_size) prefix_length + 1];
- break;
-
- case AML_DUAL_NAME_PREFIX:
-
- /* Two 4-byte names */
-
- names_index = prefix_length + 1;
- num_segments = 2;
- break;
-
- case 0:
-
- /* null_name */
-
- names_index = 0;
- num_segments = 0;
- break;
-
- default:
-
- /* one 4-byte name */
-
- names_index = prefix_length;
- num_segments = 1;
- break;
- }
- }
-
- /*
- * Calculate the length of converted_name, which equals the length
- * of the prefix, length of all object names, length of any required
- * punctuation ('.') between object names, plus the NULL terminator.
- */
- required_length = prefix_length + (4 * num_segments) +
- ((num_segments > 0) ? (num_segments - 1) : 0) + 1;
-
- /*
- * Check to see if we're still in bounds. If not, there's a problem
- * with internal_name (invalid format).
- */
- if (required_length > internal_name_length) {
- ACPI_ERROR((AE_INFO, "Invalid internal name"));
- return_ACPI_STATUS(AE_BAD_PATHNAME);
- }
-
- /*
- * Build converted_name
- */
- *converted_name = ACPI_ALLOCATE_ZEROED(required_length);
- if (!(*converted_name)) {
- return_ACPI_STATUS(AE_NO_MEMORY);
- }
-
- j = 0;
-
- for (i = 0; i < prefix_length; i++) {
- (*converted_name)[j++] = internal_name[i];
- }
-
- if (num_segments > 0) {
- for (i = 0; i < num_segments; i++) {
- if (i > 0) {
- (*converted_name)[j++] = '.';
- }
-
- (*converted_name)[j++] = internal_name[names_index++];
- (*converted_name)[j++] = internal_name[names_index++];
- (*converted_name)[j++] = internal_name[names_index++];
- (*converted_name)[j++] = internal_name[names_index++];
- }
- }
-
- if (converted_name_length) {
- *converted_name_length = (u32) required_length;
- }
-
- return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_map_handle_to_node
- *
- * PARAMETERS: Handle - Handle to be converted to an Node
- *
- * RETURN: A Name table entry pointer
- *
- * DESCRIPTION: Convert a namespace handle to a real Node
- *
- * Note: Real integer handles would allow for more verification
- * and keep all pointers within this subsystem - however this introduces
- * more (and perhaps unnecessary) overhead.
- *
- ******************************************************************************/
-
-struct acpi_namespace_node *acpi_ns_map_handle_to_node(acpi_handle handle)
-{
-
- ACPI_FUNCTION_ENTRY();
-
- /*
- * Simple implementation
- */
- if ((!handle) || (handle == ACPI_ROOT_OBJECT)) {
- return (acpi_gbl_root_node);
- }
-
- /* We can at least attempt to verify the handle */
-
- if (ACPI_GET_DESCRIPTOR_TYPE(handle) != ACPI_DESC_TYPE_NAMED) {
- return (NULL);
- }
-
- return (ACPI_CAST_PTR(struct acpi_namespace_node, handle));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_convert_entry_to_handle
- *
- * PARAMETERS: Node - Node to be converted to a Handle
- *
- * RETURN: A user handle
- *
- * DESCRIPTION: Convert a real Node to a namespace handle
- *
- ******************************************************************************/
-
-acpi_handle acpi_ns_convert_entry_to_handle(struct acpi_namespace_node *node)
-{
-
- /*
- * Simple implementation for now;
- */
- return ((acpi_handle) node);
-
-/* Example future implementation ---------------------
-
- if (!Node)
- {
- return (NULL);
- }
-
- if (Node == acpi_gbl_root_node)
- {
- return (ACPI_ROOT_OBJECT);
- }
-
- return ((acpi_handle) Node);
-------------------------------------------------------*/
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_terminate
- *
- * PARAMETERS: none
- *
- * RETURN: none
- *
- * DESCRIPTION: free memory allocated for namespace and ACPI table storage.
- *
- ******************************************************************************/
-
-void acpi_ns_terminate(void)
-{
- union acpi_operand_object *obj_desc;
-
- ACPI_FUNCTION_TRACE(ns_terminate);
-
- /*
- * 1) Free the entire namespace -- all nodes and objects
- *
- * Delete all object descriptors attached to namepsace nodes
- */
- acpi_ns_delete_namespace_subtree(acpi_gbl_root_node);
-
- /* Detach any objects attached to the root */
-
- obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node);
- if (obj_desc) {
- acpi_ns_detach_object(acpi_gbl_root_node);
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n"));
- return_VOID;
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_opens_scope
- *
- * PARAMETERS: Type - A valid namespace type
- *
- * RETURN: NEWSCOPE if the passed type "opens a name scope" according
- * to the ACPI specification, else 0
- *
- ******************************************************************************/
-
-u32 acpi_ns_opens_scope(acpi_object_type type)
-{
- ACPI_FUNCTION_TRACE_STR(ns_opens_scope, acpi_ut_get_type_name(type));
-
- if (!acpi_ut_valid_object_type(type)) {
-
- /* type code out of range */
-
- ACPI_WARNING((AE_INFO, "Invalid Object Type %X", type));
- return_UINT32(ACPI_NS_NORMAL);
- }
-
- return_UINT32(((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_get_node
- *
- * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
- * \ (backslash) and ^ (carat) prefixes, and the
- * . (period) to separate segments are supported.
- * prefix_node - Root of subtree to be searched, or NS_ALL for the
- * root of the name space. If Name is fully
- * qualified (first s8 is '\'), the passed value
- * of Scope will not be accessed.
- * Flags - Used to indicate whether to perform upsearch or
- * not.
- * return_node - Where the Node is returned
- *
- * DESCRIPTION: Look up a name relative to a given scope and return the
- * corresponding Node. NOTE: Scope can be null.
- *
- * MUTEX: Locks namespace
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ns_get_node(struct acpi_namespace_node *prefix_node,
- const char *pathname,
- u32 flags, struct acpi_namespace_node **return_node)
-{
- union acpi_generic_state scope_info;
- acpi_status status;
- char *internal_path;
-
- ACPI_FUNCTION_TRACE_PTR(ns_get_node, pathname);
-
- if (!pathname) {
- *return_node = prefix_node;
- if (!prefix_node) {
- *return_node = acpi_gbl_root_node;
- }
- return_ACPI_STATUS(AE_OK);
- }
-
- /* Convert path to internal representation */
-
- status = acpi_ns_internalize_name(pathname, &internal_path);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /* Must lock namespace during lookup */
-
- status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE(status)) {
- goto cleanup;
- }
-
- /* Setup lookup scope (search starting point) */
-
- scope_info.scope.node = prefix_node;
-
- /* Lookup the name in the namespace */
-
- status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY,
- ACPI_IMODE_EXECUTE,
- (flags | ACPI_NS_DONT_OPEN_SCOPE), NULL,
- return_node);
- if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s, %s\n",
- pathname, acpi_format_exception(status)));
- }
-
- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-
- cleanup:
- ACPI_FREE(internal_path);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_get_parent_node
- *
- * PARAMETERS: Node - Current table entry
- *
- * RETURN: Parent entry of the given entry
- *
- * DESCRIPTION: Obtain the parent entry for a given entry in the namespace.
- *
- ******************************************************************************/
-
-struct acpi_namespace_node *acpi_ns_get_parent_node(struct acpi_namespace_node
- *node)
-{
- ACPI_FUNCTION_ENTRY();
-
- if (!node) {
- return (NULL);
- }
-
- /*
- * Walk to the end of this peer list. The last entry is marked with a flag
- * and the peer pointer is really a pointer back to the parent. This saves
- * putting a parent back pointer in each and every named object!
- */
- while (!(node->flags & ANOBJ_END_OF_PEER_LIST)) {
- node = node->peer;
- }
-
- return (node->peer);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_get_next_valid_node
- *
- * PARAMETERS: Node - Current table entry
- *
- * RETURN: Next valid Node in the linked node list. NULL if no more valid
- * nodes.
- *
- * DESCRIPTION: Find the next valid node within a name table.
- * Useful for implementing NULL-end-of-list loops.
- *
- ******************************************************************************/
-
-struct acpi_namespace_node *acpi_ns_get_next_valid_node(struct
- acpi_namespace_node
- *node)
-{
-
- /* If we are at the end of this peer list, return NULL */
-
- if (node->flags & ANOBJ_END_OF_PEER_LIST) {
- return NULL;
- }
-
- /* Otherwise just return the next peer */
-
- return (node->peer);
-}
-
-#ifdef ACPI_OBSOLETE_FUNCTIONS
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_find_parent_name
- *
- * PARAMETERS: *child_node - Named Obj whose name is to be found
- *
- * RETURN: The ACPI name
- *
- * DESCRIPTION: Search for the given obj in its parent scope and return the
- * name segment, or "????" if the parent name can't be found
- * (which "should not happen").
- *
- ******************************************************************************/
-
-acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node * child_node)
-{
- struct acpi_namespace_node *parent_node;
-
- ACPI_FUNCTION_TRACE(ns_find_parent_name);
-
- if (child_node) {
-
- /* Valid entry. Get the parent Node */
-
- parent_node = acpi_ns_get_parent_node(child_node);
- if (parent_node) {
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "Parent of %p [%4.4s] is %p [%4.4s]\n",
- child_node,
- acpi_ut_get_node_name(child_node),
- parent_node,
- acpi_ut_get_node_name(parent_node)));
-
- if (parent_node->name.integer) {
- return_VALUE((acpi_name) parent_node->name.
- integer);
- }
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "Unable to find parent of %p (%4.4s)\n",
- child_node,
- acpi_ut_get_node_name(child_node)));
- }
-
- return_VALUE(ACPI_UNKNOWN_NAME);
-}
-#endif