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Diffstat (limited to 'sys/contrib/dev/acpica/utcache.c')
-rw-r--r-- | sys/contrib/dev/acpica/utcache.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/utcache.c b/sys/contrib/dev/acpica/utcache.c new file mode 100644 index 0000000..56e88b3 --- /dev/null +++ b/sys/contrib/dev/acpica/utcache.c @@ -0,0 +1,425 @@ +/****************************************************************************** + * + * Module Name: utcache - local cache allocation routines + * $Revision: 1.8 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. + * All rights reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + *****************************************************************************/ + +#define __UTCACHE_C__ + +#include <contrib/dev/acpica/acpi.h> + +#define _COMPONENT ACPI_UTILITIES + ACPI_MODULE_NAME ("utcache") + + +#ifdef ACPI_USE_LOCAL_CACHE +/******************************************************************************* + * + * FUNCTION: AcpiOsCreateCache + * + * PARAMETERS: CacheName - Ascii name for the cache + * ObjectSize - Size of each cached object + * MaxDepth - Maximum depth of the cache (in objects) + * ReturnCache - Where the new cache object is returned + * + * RETURN: Status + * + * DESCRIPTION: Create a cache object + * + ******************************************************************************/ + +ACPI_STATUS +AcpiOsCreateCache ( + char *CacheName, + UINT16 ObjectSize, + UINT16 MaxDepth, + ACPI_MEMORY_LIST **ReturnCache) +{ + ACPI_MEMORY_LIST *Cache; + + + ACPI_FUNCTION_ENTRY (); + + + if (!CacheName || !ReturnCache || (ObjectSize < 16)) + { + return (AE_BAD_PARAMETER); + } + + /* Create the cache object */ + + Cache = AcpiOsAllocate (sizeof (ACPI_MEMORY_LIST)); + if (!Cache) + { + return (AE_NO_MEMORY); + } + + /* Populate the cache object and return it */ + + ACPI_MEMSET (Cache, 0, sizeof (ACPI_MEMORY_LIST)); + Cache->LinkOffset = 8; + Cache->ListName = CacheName; + Cache->ObjectSize = ObjectSize; + Cache->MaxDepth = MaxDepth; + + *ReturnCache = Cache; + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiOsPurgeCache + * + * PARAMETERS: Cache - Handle to cache object + * + * RETURN: Status + * + * DESCRIPTION: Free all objects within the requested cache. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiOsPurgeCache ( + ACPI_MEMORY_LIST *Cache) +{ + char *Next; + + + ACPI_FUNCTION_ENTRY (); + + + if (!Cache) + { + return (AE_BAD_PARAMETER); + } + + /* Walk the list of objects in this cache */ + + while (Cache->ListHead) + { + /* Delete and unlink one cached state object */ + + Next = *(ACPI_CAST_INDIRECT_PTR (char, + &(((char *) Cache->ListHead)[Cache->LinkOffset]))); + ACPI_FREE (Cache->ListHead); + + Cache->ListHead = Next; + Cache->CurrentDepth--; + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiOsDeleteCache + * + * PARAMETERS: Cache - Handle to cache object + * + * RETURN: Status + * + * DESCRIPTION: Free all objects within the requested cache and delete the + * cache object. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiOsDeleteCache ( + ACPI_MEMORY_LIST *Cache) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_ENTRY (); + + + /* Purge all objects in the cache */ + + Status = AcpiOsPurgeCache (Cache); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Now we can delete the cache object */ + + AcpiOsFree (Cache); + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiOsReleaseObject + * + * PARAMETERS: Cache - Handle to cache object + * Object - The object to be released + * + * RETURN: None + * + * DESCRIPTION: Release an object to the specified cache. If cache is full, + * the object is deleted. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiOsReleaseObject ( + ACPI_MEMORY_LIST *Cache, + void *Object) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_ENTRY (); + + + if (!Cache || !Object) + { + return (AE_BAD_PARAMETER); + } + + /* If cache is full, just free this object */ + + if (Cache->CurrentDepth >= Cache->MaxDepth) + { + ACPI_FREE (Object); + ACPI_MEM_TRACKING (Cache->TotalFreed++); + } + + /* Otherwise put this object back into the cache */ + + else + { + Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Mark the object as cached */ + + ACPI_MEMSET (Object, 0xCA, Cache->ObjectSize); + ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_CACHED); + + /* Put the object at the head of the cache list */ + + * (ACPI_CAST_INDIRECT_PTR (char, + &(((char *) Object)[Cache->LinkOffset]))) = Cache->ListHead; + Cache->ListHead = Object; + Cache->CurrentDepth++; + + (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES); + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiOsAcquireObject + * + * PARAMETERS: Cache - Handle to cache object + * + * RETURN: the acquired object. NULL on error + * + * DESCRIPTION: Get an object from the specified cache. If cache is empty, + * the object is allocated. + * + ******************************************************************************/ + +void * +AcpiOsAcquireObject ( + ACPI_MEMORY_LIST *Cache) +{ + ACPI_STATUS Status; + void *Object; + + + ACPI_FUNCTION_NAME (OsAcquireObject); + + + if (!Cache) + { + return (NULL); + } + + Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES); + if (ACPI_FAILURE (Status)) + { + return (NULL); + } + + ACPI_MEM_TRACKING (Cache->Requests++); + + /* Check the cache first */ + + if (Cache->ListHead) + { + /* There is an object available, use it */ + + Object = Cache->ListHead; + Cache->ListHead = *(ACPI_CAST_INDIRECT_PTR (char, + &(((char *) Object)[Cache->LinkOffset]))); + + Cache->CurrentDepth--; + + ACPI_MEM_TRACKING (Cache->Hits++); + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Object %p from %s cache\n", Object, Cache->ListName)); + + Status = AcpiUtReleaseMutex (ACPI_MTX_CACHES); + if (ACPI_FAILURE (Status)) + { + return (NULL); + } + + /* Clear (zero) the previously used Object */ + + ACPI_MEMSET (Object, 0, Cache->ObjectSize); + } + else + { + /* The cache is empty, create a new object */ + + ACPI_MEM_TRACKING (Cache->TotalAllocated++); + +#ifdef ACPI_DBG_TRACK_ALLOCATIONS + if ((Cache->TotalAllocated - Cache->TotalFreed) > Cache->MaxOccupied) + { + Cache->MaxOccupied = Cache->TotalAllocated - Cache->TotalFreed; + } +#endif + + /* Avoid deadlock with ACPI_ALLOCATE_ZEROED */ + + Status = AcpiUtReleaseMutex (ACPI_MTX_CACHES); + if (ACPI_FAILURE (Status)) + { + return (NULL); + } + + Object = ACPI_ALLOCATE_ZEROED (Cache->ObjectSize); + if (!Object) + { + return (NULL); + } + } + + return (Object); +} +#endif /* ACPI_USE_LOCAL_CACHE */ + + |