967440e3be
Implemented a new acpi_spinlock type for the OSL lock interfaces. This allows the type to be customized to the host OS for improved efficiency (since a spinlock is usually a very small object.) Implemented support for "ignored" bits in the ACPI registers. According to the ACPI specification, these bits should be preserved when writing the registers via a read/modify/write cycle. There are 3 bits preserved in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11]. http://bugzilla.kernel.org/show_bug.cgi?id=3691 Implemented the initial deployment of new OSL mutex interfaces. Since some host operating systems have separate mutex and semaphore objects, this feature was requested. The base code now uses mutexes (and the new mutex interfaces) wherever a binary semaphore was used previously. However, for the current release, the mutex interfaces are defined as macros to map them to the existing semaphore interfaces. Fixed several problems with the support for the control method SyncLevel parameter. The SyncLevel now works according to the ACPI specification and in concert with the Mutex SyncLevel parameter, since the current SyncLevel is a property of the executing thread. Mutual exclusion for control methods is now implemented with a mutex instead of a semaphore. Fixed three instances of the use of the C shift operator in the bitfield support code (exfldio.c) to avoid the use of a shift value larger than the target data width. The behavior of C compilers is undefined in this case and can cause unpredictable results, and therefore the case must be detected and avoided. (Fiodor Suietov) Added an info message whenever an SSDT or OEM table is loaded dynamically via the Load() or LoadTable() ASL operators. This should improve debugging capability since it will show exactly what tables have been loaded (beyond the tables present in the RSDT/XSDT.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
202 lines
6.3 KiB
C
202 lines
6.3 KiB
C
/******************************************************************************
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*
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* Module Name: dsinit - Object initialization namespace walk
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acdispat.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dsinit")
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/* Local prototypes */
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static acpi_status
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acpi_ds_init_one_object(acpi_handle obj_handle,
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u32 level, void *context, void **return_value);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_init_one_object
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*
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* PARAMETERS: obj_handle - Node for the object
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* Level - Current nesting level
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* Context - Points to a init info struct
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* return_value - Not used
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*
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* RETURN: Status
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*
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* DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
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* within the namespace.
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*
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* Currently, the only objects that require initialization are:
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* 1) Methods
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* 2) Operation Regions
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*
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******************************************************************************/
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static acpi_status
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acpi_ds_init_one_object(acpi_handle obj_handle,
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u32 level, void *context, void **return_value)
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{
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struct acpi_init_walk_info *info =
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(struct acpi_init_walk_info *)context;
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struct acpi_namespace_node *node =
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(struct acpi_namespace_node *)obj_handle;
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acpi_object_type type;
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acpi_status status;
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ACPI_FUNCTION_ENTRY();
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/*
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* We are only interested in NS nodes owned by the table that
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* was just loaded
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*/
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if (node->owner_id != info->table_desc->owner_id) {
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return (AE_OK);
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}
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info->object_count++;
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/* And even then, we are only interested in a few object types */
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type = acpi_ns_get_type(obj_handle);
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switch (type) {
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case ACPI_TYPE_REGION:
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status = acpi_ds_initialize_region(obj_handle);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"During Region initialization %p [%4.4s]",
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obj_handle,
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acpi_ut_get_node_name(obj_handle)));
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}
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info->op_region_count++;
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break;
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case ACPI_TYPE_METHOD:
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/*
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* Set the execution data width (32 or 64) based upon the
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* revision number of the parent ACPI table.
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* TBD: This is really for possible future support of integer width
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* on a per-table basis. Currently, we just use a global for the width.
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*/
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if (info->table_desc->pointer->revision == 1) {
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node->flags |= ANOBJ_DATA_WIDTH_32;
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}
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info->method_count++;
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break;
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case ACPI_TYPE_DEVICE:
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info->device_count++;
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break;
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default:
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break;
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}
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/*
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* We ignore errors from above, and always return OK, since
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* we don't want to abort the walk on a single error.
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*/
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_initialize_objects
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*
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* PARAMETERS: table_desc - Descriptor for parent ACPI table
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* start_node - Root of subtree to be initialized.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
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* necessary initialization on the objects found therein
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*
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******************************************************************************/
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acpi_status
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acpi_ds_initialize_objects(struct acpi_table_desc * table_desc,
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struct acpi_namespace_node * start_node)
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{
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acpi_status status;
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struct acpi_init_walk_info info;
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ACPI_FUNCTION_TRACE(ds_initialize_objects);
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"**** Starting initialization of namespace objects ****\n"));
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
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info.method_count = 0;
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info.op_region_count = 0;
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info.object_count = 0;
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info.device_count = 0;
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info.table_desc = table_desc;
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/* Walk entire namespace from the supplied root */
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status = acpi_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
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acpi_ds_init_one_object, &info, NULL);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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"\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
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table_desc->pointer->signature,
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table_desc->owner_id, info.object_count,
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info.device_count, info.method_count,
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info.op_region_count));
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"%hd Methods, %hd Regions\n", info.method_count,
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info.op_region_count));
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return_ACPI_STATUS(AE_OK);
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}
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