--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wlan_bearer/wlanldd/wlan_symbian/wlanldd_symbian/src/wlldddmausablememory.cpp	Tue Feb 02 02:03:13 2010 +0200
@@ -0,0 +1,134 @@
+/*
+* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:   Implementation of the WlanDmaUsableMemory class.
+*
+*/
+
+/*
+* %version: 11 %
+*/
+
+#include "WlLddWlanLddConfig.h"
+#include "wlldddmausablememory.h"
+
+#include <platform.h>
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TUint32 WlanDmaUsableMemory::Init( 
+    TUint32 aSizeInBytes, 
+    TBool aUseCachedMemory )
+    {
+    TraceDump(INIT_LEVEL, (("WLANLDD: init dma usable memory")));
+    TraceDump(INIT_LEVEL, (("size requested: %d"), aSizeInBytes));
+
+    // extract MMU page size in bytes
+	iSizeInBytes = Kern::RoundToPageSize( aSizeInBytes );
+
+    TraceDump(INIT_LEVEL, (("MMU page size: %d"), iSizeInBytes));
+
+    // allocate a block of physically contiguous RAM  
+    TInt ret( Epoc::AllocPhysicalRam( iSizeInBytes, iPhysicalRamAddr ) );
+    if ( ret != KErrNone )
+        {
+        // this can happen if we have  no memory
+        TraceDump(ERROR_LEVEL, (("WLANLDD: physical RAM alloc failure: %d"), 
+            ret));
+        iSizeInBytes = 0;
+        return 0;
+        }
+
+    TraceDump(INIT_LEVEL, (("physical RAM address: 0x%08x"), iPhysicalRamAddr));
+
+    // determine if cached memory shall be used
+    TUint cacheOption = aUseCachedMemory ? 
+        EMapAttrCachedMax : 
+        EMapAttrFullyBlocking;
+
+    // use a DPlatChunk
+    ret = DPlatChunkHw::New( iChunk, iPhysicalRamAddr,
+                          iSizeInBytes,
+                          EMapAttrUserRw | cacheOption );
+    if ( ret != KErrNone )
+        {
+        // can not fail
+        TraceDump(ERROR_LEVEL, (("WLANLDD: DPlatChunkHw alloc failure: %d"), ret));
+        os_assert( (TUint8*)("WLANLDD: panic"), (TUint8*)(WLAN_FILE), __LINE__ );
+        return 0;
+        }
+
+    // init success
+    TraceDump(INIT_LEVEL, 
+        (("WlanDmaUsableMemory::Init: Platform Hw Chunk create success with cacheOption: 0x%08x"), 
+        cacheOption));
+    iFlags |= KResourceAcquired;
+    return iSizeInBytes;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void WlanDmaUsableMemory::Finit()
+    {
+    if ( iFlags & KResourceAcquired )
+        {
+        TraceDump(INIT_LEVEL, (("WLANLDD: finit dma usable memory")));
+
+        iFlags &= ~KResourceAcquired;
+        // close the chunk. This also automatically deletes the object 
+        // as its reference count goes to 0
+        iChunk->Close( NULL );
+
+        // free the physical ram which was associated with the chunk
+        const TInt ret( Epoc::FreePhysicalRam( 
+            iPhysicalRamAddr, iSizeInBytes ) );
+
+        iPhysicalRamAddr = 0;
+        iSizeInBytes = 0;
+
+#ifndef NDEBUG
+        if ( ret != KErrNone )
+            {
+            // can not fail
+            TraceDump(ERROR_LEVEL, (("WLANLDD: physical RAM free failure: %d"), ret));
+            os_assert( (TUint8*)("WLANLDD: panic"), (TUint8*)(WLAN_FILE), __LINE__ );
+            }
+#endif        
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TLinAddr WlanDmaUsableMemory::Addr( 
+    TUint32 aSizeInBytes )
+    {
+    return (aSizeInBytes <= iSizeInBytes) 
+        ? iChunk->LinearAddress() : NULL;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TLinAddr WlanDmaUsableMemory::Addr()
+    {
+    return iChunk->LinearAddress();
+    }