Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/namespace/nsaccess.c b/drivers/acpi/namespace/nsaccess.c
new file mode 100644
index 0000000..1c0c123
--- /dev/null
+++ b/drivers/acpi/namespace/nsaccess.c
@@ -0,0 +1,637 @@
+/*******************************************************************************
+ *
+ * Module Name: nsaccess - Top-level functions for accessing ACPI namespace
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * 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/amlcode.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acdispat.h>
+
+
+#define _COMPONENT ACPI_NAMESPACE
+ ACPI_MODULE_NAME ("nsaccess")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_root_initialize
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Allocate and initialize the default root named objects
+ *
+ * MUTEX: Locks namespace for entire execution
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_root_initialize (void)
+{
+ acpi_status status;
+ const struct acpi_predefined_names *init_val = NULL;
+ struct acpi_namespace_node *new_node;
+ union acpi_operand_object *obj_desc;
+ acpi_string val = NULL;
+
+
+ ACPI_FUNCTION_TRACE ("ns_root_initialize");
+
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /*
+ * The global root ptr is initially NULL, so a non-NULL value indicates
+ * that acpi_ns_root_initialize() has already been called; just return.
+ */
+ if (acpi_gbl_root_node) {
+ status = AE_OK;
+ goto unlock_and_exit;
+ }
+
+ /*
+ * Tell the rest of the subsystem that the root is initialized
+ * (This is OK because the namespace is locked)
+ */
+ acpi_gbl_root_node = &acpi_gbl_root_node_struct;
+
+ /* Enter the pre-defined names in the name table */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "Entering predefined entries into namespace\n"));
+
+ for (init_val = acpi_gbl_pre_defined_names; init_val->name; init_val++) {
+ /* _OSI is optional for now, will be permanent later */
+
+ if (!ACPI_STRCMP (init_val->name, "_OSI") && !acpi_gbl_create_osi_method) {
+ continue;
+ }
+
+ status = acpi_ns_lookup (NULL, init_val->name, init_val->type,
+ ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH,
+ NULL, &new_node);
+
+ if (ACPI_FAILURE (status) || (!new_node)) /* Must be on same line for code converter */ {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Could not create predefined name %s, %s\n",
+ init_val->name, acpi_format_exception (status)));
+ }
+
+ /*
+ * Name entered successfully.
+ * If entry in pre_defined_names[] specifies an
+ * initial value, create the initial value.
+ */
+ if (init_val->val) {
+ status = acpi_os_predefined_override (init_val, &val);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Could not override predefined %s\n",
+ init_val->name));
+ }
+
+ if (!val) {
+ val = init_val->val;
+ }
+
+ /*
+ * Entry requests an initial value, allocate a
+ * descriptor for it.
+ */
+ obj_desc = acpi_ut_create_internal_object (init_val->type);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ /*
+ * Convert value string from table entry to
+ * internal representation. Only types actually
+ * used for initial values are implemented here.
+ */
+ switch (init_val->type) {
+ case ACPI_TYPE_METHOD:
+ obj_desc->method.param_count = (u8) ACPI_TO_INTEGER (val);
+ obj_desc->common.flags |= AOPOBJ_DATA_VALID;
+
+#if defined (_ACPI_ASL_COMPILER) || defined (_ACPI_DUMP_App)
+
+ /*
+ * i_aSL Compiler cheats by putting parameter count
+ * in the owner_iD
+ */
+ new_node->owner_id = obj_desc->method.param_count;
+#else
+ /* Mark this as a very SPECIAL method */
+
+ obj_desc->method.method_flags = AML_METHOD_INTERNAL_ONLY;
+ obj_desc->method.implementation = acpi_ut_osi_implementation;
+#endif
+ break;
+
+ case ACPI_TYPE_INTEGER:
+
+ obj_desc->integer.value = ACPI_TO_INTEGER (val);
+ break;
+
+
+ case ACPI_TYPE_STRING:
+
+ /*
+ * Build an object around the static string
+ */
+ obj_desc->string.length = (u32) ACPI_STRLEN (val);
+ obj_desc->string.pointer = val;
+ obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
+ break;
+
+
+ case ACPI_TYPE_MUTEX:
+
+ obj_desc->mutex.node = new_node;
+ obj_desc->mutex.sync_level = (u8) (ACPI_TO_INTEGER (val) - 1);
+
+ if (ACPI_STRCMP (init_val->name, "_GL_") == 0) {
+ /*
+ * Create a counting semaphore for the
+ * global lock
+ */
+ status = acpi_os_create_semaphore (ACPI_NO_UNIT_LIMIT,
+ 1, &obj_desc->mutex.semaphore);
+ if (ACPI_FAILURE (status)) {
+ acpi_ut_remove_reference (obj_desc);
+ goto unlock_and_exit;
+ }
+
+ /*
+ * We just created the mutex for the
+ * global lock, save it
+ */
+ acpi_gbl_global_lock_semaphore = obj_desc->mutex.semaphore;
+ }
+ else {
+ /* Create a mutex */
+
+ status = acpi_os_create_semaphore (1, 1,
+ &obj_desc->mutex.semaphore);
+ if (ACPI_FAILURE (status)) {
+ acpi_ut_remove_reference (obj_desc);
+ goto unlock_and_exit;
+ }
+ }
+ break;
+
+
+ default:
+
+ ACPI_REPORT_ERROR (("Unsupported initial type value %X\n",
+ init_val->type));
+ acpi_ut_remove_reference (obj_desc);
+ obj_desc = NULL;
+ continue;
+ }
+
+ /* Store pointer to value descriptor in the Node */
+
+ status = acpi_ns_attach_object (new_node, obj_desc,
+ ACPI_GET_OBJECT_TYPE (obj_desc));
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ }
+ }
+
+
+unlock_and_exit:
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+
+ /* Save a handle to "_GPE", it is always present */
+
+ if (ACPI_SUCCESS (status)) {
+ status = acpi_ns_get_node_by_path ("\\_GPE", NULL, ACPI_NS_NO_UPSEARCH,
+ &acpi_gbl_fadt_gpe_device);
+ }
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_lookup
+ *
+ * PARAMETERS: prefix_node - Search scope if name is not fully qualified
+ * Pathname - Search pathname, in internal format
+ * (as represented in the AML stream)
+ * Type - Type associated with name
+ * interpreter_mode - IMODE_LOAD_PASS2 => add name if not found
+ * Flags - Flags describing the search restrictions
+ * walk_state - Current state of the walk
+ * return_node - Where the Node is placed (if found
+ * or created successfully)
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Find or enter the passed name in the name space.
+ * Log an error if name not found in Exec mode.
+ *
+ * MUTEX: Assumes namespace is locked.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_lookup (
+ union acpi_generic_state *scope_info,
+ char *pathname,
+ acpi_object_type type,
+ acpi_interpreter_mode interpreter_mode,
+ u32 flags,
+ struct acpi_walk_state *walk_state,
+ struct acpi_namespace_node **return_node)
+{
+ acpi_status status;
+ char *path = pathname;
+ struct acpi_namespace_node *prefix_node;
+ struct acpi_namespace_node *current_node = NULL;
+ struct acpi_namespace_node *this_node = NULL;
+ u32 num_segments;
+ u32 num_carats;
+ acpi_name simple_name;
+ acpi_object_type type_to_check_for;
+ acpi_object_type this_search_type;
+ u32 search_parent_flag = ACPI_NS_SEARCH_PARENT;
+ u32 local_flags = flags & ~(ACPI_NS_ERROR_IF_FOUND |
+ ACPI_NS_SEARCH_PARENT);
+
+
+ ACPI_FUNCTION_TRACE ("ns_lookup");
+
+
+ if (!return_node) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ acpi_gbl_ns_lookup_count++;
+ *return_node = ACPI_ENTRY_NOT_FOUND;
+
+ if (!acpi_gbl_root_node) {
+ return_ACPI_STATUS (AE_NO_NAMESPACE);
+ }
+
+ /*
+ * Get the prefix scope.
+ * A null scope means use the root scope
+ */
+ if ((!scope_info) ||
+ (!scope_info->scope.node)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Null scope prefix, using root node (%p)\n",
+ acpi_gbl_root_node));
+
+ prefix_node = acpi_gbl_root_node;
+ }
+ else {
+ prefix_node = scope_info->scope.node;
+ if (ACPI_GET_DESCRIPTOR_TYPE (prefix_node) != ACPI_DESC_TYPE_NAMED) {
+ ACPI_REPORT_ERROR (("ns_lookup: %p is not a namespace node [%s]\n",
+ prefix_node, acpi_ut_get_descriptor_name (prefix_node)));
+ return_ACPI_STATUS (AE_AML_INTERNAL);
+ }
+
+ /*
+ * This node might not be a actual "scope" node (such as a
+ * Device/Method, etc.) It could be a Package or other object node.
+ * Backup up the tree to find the containing scope node.
+ */
+ while (!acpi_ns_opens_scope (prefix_node->type) &&
+ prefix_node->type != ACPI_TYPE_ANY) {
+ prefix_node = acpi_ns_get_parent_node (prefix_node);
+ }
+ }
+
+ /* Save type TBD: may be no longer necessary */
+
+ type_to_check_for = type;
+
+ /*
+ * Begin examination of the actual pathname
+ */
+ if (!pathname) {
+ /* A Null name_path is allowed and refers to the root */
+
+ num_segments = 0;
+ this_node = acpi_gbl_root_node;
+ path = "";
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Null Pathname (Zero segments), Flags=%X\n", flags));
+ }
+ else {
+ /*
+ * Name pointer is valid (and must be in internal name format)
+ *
+ * Check for scope prefixes:
+ *
+ * As represented in the AML stream, a namepath consists of an
+ * optional scope prefix followed by a name segment part.
+ *
+ * If present, the scope prefix is either a Root Prefix (in
+ * which case the name is fully qualified), or one or more
+ * Parent Prefixes (in which case the name's scope is relative
+ * to the current scope).
+ */
+ if (*path == (u8) AML_ROOT_PREFIX) {
+ /* Pathname is fully qualified, start from the root */
+
+ this_node = acpi_gbl_root_node;
+ search_parent_flag = ACPI_NS_NO_UPSEARCH;
+
+ /* Point to name segment part */
+
+ path++;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Path is absolute from root [%p]\n", this_node));
+ }
+ else {
+ /* Pathname is relative to current scope, start there */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Searching relative to prefix scope [%4.4s] (%p)\n",
+ acpi_ut_get_node_name (prefix_node), prefix_node));
+
+ /*
+ * Handle multiple Parent Prefixes (carat) by just getting
+ * the parent node for each prefix instance.
+ */
+ this_node = prefix_node;
+ num_carats = 0;
+ while (*path == (u8) AML_PARENT_PREFIX) {
+ /* Name is fully qualified, no search rules apply */
+
+ search_parent_flag = ACPI_NS_NO_UPSEARCH;
+ /*
+ * Point past this prefix to the name segment
+ * part or the next Parent Prefix
+ */
+ path++;
+
+ /* Backup to the parent node */
+
+ num_carats++;
+ this_node = acpi_ns_get_parent_node (this_node);
+ if (!this_node) {
+ /* Current scope has no parent scope */
+
+ ACPI_REPORT_ERROR (
+ ("ACPI path has too many parent prefixes (^) - reached beyond root node\n"));
+ return_ACPI_STATUS (AE_NOT_FOUND);
+ }
+ }
+
+ if (search_parent_flag == ACPI_NS_NO_UPSEARCH) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Search scope is [%4.4s], path has %d carat(s)\n",
+ acpi_ut_get_node_name (this_node), num_carats));
+ }
+ }
+
+ /*
+ * Determine the number of ACPI name segments in this pathname.
+ *
+ * The segment part consists of either:
+ * - A Null name segment (0)
+ * - A dual_name_prefix followed by two 4-byte name segments
+ * - A multi_name_prefix followed by a byte indicating the
+ * number of segments and the segments themselves.
+ * - A single 4-byte name segment
+ *
+ * Examine the name prefix opcode, if any, to determine the number of
+ * segments.
+ */
+ switch (*path) {
+ case 0:
+ /*
+ * Null name after a root or parent prefixes. We already
+ * have the correct target node and there are no name segments.
+ */
+ num_segments = 0;
+ type = this_node->type;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Prefix-only Pathname (Zero name segments), Flags=%X\n",
+ flags));
+ break;
+
+ case AML_DUAL_NAME_PREFIX:
+
+ /* More than one name_seg, search rules do not apply */
+
+ search_parent_flag = ACPI_NS_NO_UPSEARCH;
+
+ /* Two segments, point to first name segment */
+
+ num_segments = 2;
+ path++;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Dual Pathname (2 segments, Flags=%X)\n", flags));
+ break;
+
+ case AML_MULTI_NAME_PREFIX_OP:
+
+ /* More than one name_seg, search rules do not apply */
+
+ search_parent_flag = ACPI_NS_NO_UPSEARCH;
+
+ /* Extract segment count, point to first name segment */
+
+ path++;
+ num_segments = (u32) (u8) *path;
+ path++;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Multi Pathname (%d Segments, Flags=%X) \n",
+ num_segments, flags));
+ break;
+
+ default:
+ /*
+ * Not a Null name, no Dual or Multi prefix, hence there is
+ * only one name segment and Pathname is already pointing to it.
+ */
+ num_segments = 1;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Simple Pathname (1 segment, Flags=%X)\n", flags));
+ break;
+ }
+
+ ACPI_DEBUG_EXEC (acpi_ns_print_pathname (num_segments, path));
+ }
+
+
+ /*
+ * Search namespace for each segment of the name. Loop through and
+ * verify (or add to the namespace) each name segment.
+ *
+ * The object type is significant only at the last name
+ * segment. (We don't care about the types along the path, only
+ * the type of the final target object.)
+ */
+ this_search_type = ACPI_TYPE_ANY;
+ current_node = this_node;
+ while (num_segments && current_node) {
+ num_segments--;
+ if (!num_segments) {
+ /*
+ * This is the last segment, enable typechecking
+ */
+ this_search_type = type;
+
+ /*
+ * Only allow automatic parent search (search rules) if the caller
+ * requested it AND we have a single, non-fully-qualified name_seg
+ */
+ if ((search_parent_flag != ACPI_NS_NO_UPSEARCH) &&
+ (flags & ACPI_NS_SEARCH_PARENT)) {
+ local_flags |= ACPI_NS_SEARCH_PARENT;
+ }
+
+ /* Set error flag according to caller */
+
+ if (flags & ACPI_NS_ERROR_IF_FOUND) {
+ local_flags |= ACPI_NS_ERROR_IF_FOUND;
+ }
+ }
+
+ /* Extract one ACPI name from the front of the pathname */
+
+ ACPI_MOVE_32_TO_32 (&simple_name, path);
+
+ /* Try to find the single (4 character) ACPI name */
+
+ status = acpi_ns_search_and_enter (simple_name, walk_state, current_node,
+ interpreter_mode, this_search_type, local_flags, &this_node);
+ if (ACPI_FAILURE (status)) {
+ if (status == AE_NOT_FOUND) {
+ /* Name not found in ACPI namespace */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
+ "Name [%4.4s] not found in scope [%4.4s] %p\n",
+ (char *) &simple_name, (char *) ¤t_node->name,
+ current_node));
+ }
+
+ *return_node = this_node;
+ return_ACPI_STATUS (status);
+ }
+
+ /*
+ * Sanity typecheck of the target object:
+ *
+ * If 1) This is the last segment (num_segments == 0)
+ * 2) And we are looking for a specific type
+ * (Not checking for TYPE_ANY)
+ * 3) Which is not an alias
+ * 4) Which is not a local type (TYPE_SCOPE)
+ * 5) And the type of target object is known (not TYPE_ANY)
+ * 6) And target object does not match what we are looking for
+ *
+ * Then we have a type mismatch. Just warn and ignore it.
+ */
+ if ((num_segments == 0) &&
+ (type_to_check_for != ACPI_TYPE_ANY) &&
+ (type_to_check_for != ACPI_TYPE_LOCAL_ALIAS) &&
+ (type_to_check_for != ACPI_TYPE_LOCAL_METHOD_ALIAS) &&
+ (type_to_check_for != ACPI_TYPE_LOCAL_SCOPE) &&
+ (this_node->type != ACPI_TYPE_ANY) &&
+ (this_node->type != type_to_check_for)) {
+ /* Complain about a type mismatch */
+
+ ACPI_REPORT_WARNING (
+ ("ns_lookup: Type mismatch on %4.4s (%s), searching for (%s)\n",
+ (char *) &simple_name, acpi_ut_get_type_name (this_node->type),
+ acpi_ut_get_type_name (type_to_check_for)));
+ }
+
+ /*
+ * If this is the last name segment and we are not looking for a
+ * specific type, but the type of found object is known, use that type
+ * to see if it opens a scope.
+ */
+ if ((num_segments == 0) && (type == ACPI_TYPE_ANY)) {
+ type = this_node->type;
+ }
+
+ /* Point to next name segment and make this node current */
+
+ path += ACPI_NAME_SIZE;
+ current_node = this_node;
+ }
+
+ /*
+ * Always check if we need to open a new scope
+ */
+ if (!(flags & ACPI_NS_DONT_OPEN_SCOPE) && (walk_state)) {
+ /*
+ * If entry is a type which opens a scope, push the new scope on the
+ * scope stack.
+ */
+ if (acpi_ns_opens_scope (type)) {
+ status = acpi_ds_scope_stack_push (this_node, type, walk_state);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+ }
+
+ *return_node = this_node;
+ return_ACPI_STATUS (AE_OK);
+}
+