--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: utcache - local cache allocation routines
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999 - 2009, 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 "acpi.h"
+#include "accommon.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_STATUS Status;
+
+
+ ACPI_FUNCTION_ENTRY ();
+
+
+ if (!Cache)
+ {
+ return (AE_BAD_PARAMETER);
+ }
+
+ Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES);
+ if (ACPI_FAILURE (Status))
+ {
+ return (Status);
+ }
+
+ /* 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--;
+ }
+
+ (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES);
+ 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 */
+
+
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