/*
* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "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: 
* This file is part of the NE1_TB Variant Base Port
* Hardware Configuration Respoitory Platform Specific Layer (PSL) 
*
*/



#include "hcr_debug.h"

#include "hcr_hai.h"

#include "hcr_uids.h"

#include <plat_priv.h>
#include <kernel/kernboot.h>

// -- GLOBALS -----------------------------------------------------------------


GLREF_C HCR::SRepositoryCompiled gRepository;
#define BUFFER_OFFSET_ZERO  0

// -- CLASSES- ----------------------------------------------------------------


class HCRVariant : public HCR::MVariant
    {    
    
public:

    HCRVariant();
    virtual ~HCRVariant();
    
public:    
    
    TInt Initialise();
    
    TBool IgnoreCoreImgRepository();
	TInt GetCompiledRepositoryAddress( TAny* & aAddr);
    TInt GetOverrideRepositoryAddress( TAny* & aAddr);
    
private:
    DChunk * iChunk;    
    };
    
    


// -- METHODS -----------------------------------------------------------------


HCRVariant::HCRVariant()
    : iChunk(0)
    {
    HCR_FUNC("HCRVariant");
    }


HCRVariant::~HCRVariant()
    {
    HCR_FUNC("~HCRVariant");
    if (iChunk != 0)
        {
        NKern::ThreadEnterCS();    
        TInt r = Kern::ChunkClose(iChunk);
        __NK_ASSERT_ALWAYS(r!=0);
        NKern::ThreadLeaveCS(); 
        }
    }


TInt HCRVariant::Initialise()
    {
    HCR_FUNC("HCRVariant::Initialise");
    
    HCR_TRACE_RETURN(KErrNone);
    }
    
    
TInt HCRVariant::GetCompiledRepositoryAddress( TAny* & aAddr)
    {
    HCR_FUNC("HCRVariant::GetCompiledRepositoryAddress");
        
    aAddr = static_cast<TAny*>(&gRepository);
    HCR_TRACE_RETURN(KErrNone);
    }

TBool HCRVariant::IgnoreCoreImgRepository()
    {
    HCR_FUNC("HCRVariant::IgnoreCoreImgRepository");
        
    HCR_TRACE_RETURN(EFalse);
    }

TInt HCRVariant::GetOverrideRepositoryAddress( TAny* & aAddr)
    {
    HCR_FUNC("HCRVariant::GetRAMRepositoryAddress");
    
    // Note to future implementor:
	// #include <kernel\kernboot.h>
	// First check to see if SMRIB was created during boot time. 
    // If SSuperPageBase::iSmrData == KSuperPageAddressFieldUndefined (i.e. -1) 
	// it does not exist, return KErrNotSupported, SMR not support by base port
    // or it is not available due to boot scenario, i.e. boot from MMC
    //
    // If it does exist (i.e. boot from NAND) then read and process the 
	// SMR entries listed in the SMRIB looking for KHCRUID_SMRPayloadUID.
	// Next using the internal sizes from the HCR dat file within the SMR image
	// determine if the RAM holding the SMR image can be shrunk to return 
	// unused RAM pages at the end of the image.
	// 
	// Finally allocate the reserved RAM identified in the SMR entry to a 
	// DChunk and return the virtual address of the HCR data file payload
	// within the SMR image, i.e. iBase+(sizeof(SSmrRomHeader)>>2).
    // Locate SMRIB 
    const TSuperPage& superpage = Kern::SuperPage();
   	TUint32* smrIB;
   	smrIB = (TUint32 *) superpage.iSmrData;
   	
   	HCR_TRACE2("--- Superpage: 0x%08x, SMRIB: 0x%08x", &superpage, smrIB);
    
   	if( (smrIB == NULL) || (smrIB == (TUint32*)KSuperPageAddressFieldUndefined))
   	    {
        HCR_TRACE_RETURN(KErrNotSupported);   	        
   	    }
   	    
   	HCR_HEX_DUMP_ABS((TUint8 *)smrIB, 8*sizeof(SSmrBank) );
    SSmrBank * smrBank = (SSmrBank *) smrIB;
    
    while( smrBank->iBase != 0 )
        {
        HCR_TRACE2("--- smrBank: 0x%08x, smrBank->iPayloadUID: 0x%08x", smrBank, smrBank->iPayloadUID);
        if( smrBank->iPayloadUID == KHCRUID_SMRPayloadUID)
            {
            HCR_TRACE2("--- smrPhysAddr: 0x%08x, size:0x%08x", smrBank->iBase, smrBank->iSize);
            NKern::ThreadEnterCS();
    
            TChunkCreateInfo info;
            info.iType = TChunkCreateInfo::ESharedKernelSingle;
            info.iMaxSize = smrBank->iSize;
            // Enable to give supervisor read only access and maximum caching at both L1 and L2.
            info.iMapAttr = EMapAttrSupRo|EMapAttrCachedMax;  
            info.iOwnsMemory = EFalse; 
            info.iDestroyedDfc = NULL;
            TUint32 mapAttr;
            TLinAddr chunkKernAddr;
            TInt r = Kern::ChunkCreate(info, iChunk, chunkKernAddr, mapAttr);
            if( r != KErrNone )
                {
                HCR_TRACE1("--- Kern::ChunkCreate failed: 0x%08x", r);
                NKern::ThreadLeaveCS();
                HCR_TRACE_RETURN(r);
                }
                
            r = Kern::ChunkCommitPhysical(iChunk, BUFFER_OFFSET_ZERO, smrBank->iSize, smrBank->iBase);
            if( r != KErrNone)
                {
                HCR_TRACE1("--- Kern::ChunkCommitPhysical failed: 0x%08x", r);
                TInt r2 = Kern::ChunkClose(iChunk);
                __NK_ASSERT_ALWAYS(r2!=0);
                NKern::ThreadLeaveCS();
                HCR_TRACE_RETURN(r);    
                }   
            NKern::ThreadLeaveCS();
                
            HCR_TRACE1("--- iChunkKernAddr: 0x%08x", chunkKernAddr);    
            // It should contains SMR and HCR image headers and some settings
            HCR_HEX_DUMP_ABS((TUint8 *)chunkKernAddr, 1024 );  
            
            // Skip the SMR header, so we return the address of the first byte in the Repository
            aAddr = (TAny *) (chunkKernAddr + sizeof(SSmrRomHeader));  
            
            HCR_TRACE_RETURN(KErrNone);
            }
         
        ++smrBank;    
        }
       	
    HCR_TRACE_RETURN(KErrNotSupported);
    }

 
// -- ENTRY POINTS ------------------------------------------------------------


GLDEF_C HCR::MVariant* CreateHCRVariant()
    {
    HCR_FUNC("CreateHCRVariant");

    return new HCRVariant;
    }