author | Gareth Stockwell <gareth.stockwell@accenture.com> |
Wed, 22 Sep 2010 17:06:27 +0100 | |
branch | graphics-phase-3 |
changeset 112 | b6c206049d8a |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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* Simple non volatile memory device. nvmemmory.h |
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* |
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*/ |
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#ifndef _NVMEMORY_H |
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#define _NVMEMORY_H |
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#pragma once |
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/*! \brief |
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NVMEMORY.DLL |
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- A simple non volatile sector addressed memory device |
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- An example of a portable high abstraction model architecture. |
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This DLL is created to serve in multiple different modeling |
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environments and tools. Model portability should be taken into |
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account when further developing and maintaining this device. |
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USAGE |
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nvmemory.dll Example usage provided by syborg_nvmemorydevice.py. |
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1 - Create an instance of SyborgNVMemory class. |
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This can be performed either by instantiating the C++ class directly |
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by calling the constructor "new SyborgNVMemory( a_sectorsize );". |
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Or by using the C API to create an instance "nvmem_create( sector_size )". |
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As you can see you need to set the sector size for your device when you create it. |
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In fact each of the API functions are provided in form of both C and C++ API functions. |
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From this on only the C API is explained. |
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2 - Reset the device by calling "nvmem_reset( self.obj )". |
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This function clears any information stored by the device instance except the sector size. |
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Note that for the C API you always need to specify the object which you wish to command. |
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3 - Create handle to your image file by calling "nvmem_open( self.obj, imagepath )". |
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Image is opened in binary mode. Store the handle. |
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Note that you need to have an image stored to a path on your PC before you can call this function. |
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You must provide the image name and path when calling. |
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Note also that there is a service provided by this DLL which can create an image for you. |
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NVMEMORY_API int32_t nvmem_create_image( SyborgNVMemory* a_syborg_nvmemory, char* a_memoryarrayname, uint32_t a_sectorcount, uint32_t a_sectorsize = NVMEM_DEFAULT_SECTORSIZE_IN_BYTES ); |
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nvmem_create_image function probably needs further development. You may also create image in your wrapper as done in example usage file. |
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You may get your memory device size by calling nvmem_get_sector_count( self.obj, nvmemhandle ). |
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nvmemhandle is the handle you got when calling nvmem_open. |
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nvmem_get_sector_count is handy in cases where you have provided a readymade image for the device. |
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In this case you don't need to go and hardcode the image size each time in your wrapper. |
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4 - Initialize callback. Provide a callback function for the device by calling "nvmem_set_callback( self.obj, nvmem_callback )". |
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Where the callback is a function pointer of a type "int (*i_NVMemCallBack)(int);". |
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Callback is called by DLL when read and write operations are finished. Parameter is the amount of sectors succesfully read or written. |
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5 - Start using your device. |
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nvmem_read( self.obj, nvmemory_sharedmemory_host_address, nvmemhandle, transaction_offset, transaction_size ) |
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nvmem_write( self.obj, nvmemory_sharedmemory_host_address, nvmemhandle, transaction_offset, transaction_size ) |
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See syborg_nvmemorydevice.py to learn more about device usage. |
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*/ |
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#include "platformtypes.h" |
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#ifdef WIN32 |
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#ifdef NVMEMORY_EXPORTS |
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#define NVMEMORY_API __declspec(dllexport) |
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#else |
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#define NVMEMORY_API __declspec(dllimport) |
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#endif |
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#else |
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#define NVMEMORY_API |
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#endif |
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class NVMEMORY_API SyborgNVMemory; |
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extern "C" |
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{ |
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const int32_t NVMEM_DEFAULT_SECTORSIZE_IN_BYTES = 512; |
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const int32_t NVMEM_MAX_STREAMHANDLES = 16; |
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/*Nvmemory error codes*/ |
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const int32_t NVMEM_OK = 0; |
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const int32_t NVMEM_ERROR_OUT_OF_FREE_STREAMHANDLES = -1; |
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const int32_t NVMEM_ERROR_FOPEN = -2; |
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const int32_t NVMEM_ERROR_FCLOSE = -3; |
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const int32_t NVMEM_ERROR_FFLUSH = -4; |
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const int32_t NVMEM_ERROR_FSEEK = -5; |
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const int32_t NVMEM_ERROR_FREAD = -6; |
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const int32_t NVMEM_ERROR_FWRITE = -7; |
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const int32_t NVMEM_ERROR_SETVBUF = -8; |
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const int32_t NVMEM_ERROR_CREATE = -9; |
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const int32_t NVMEM_ERROR_FPRINTF = -10; |
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/** |
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* Reset the device |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @return TODO an error if fails |
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*/ |
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NVMEMORY_API int32_t nvmem_reset( SyborgNVMemory* a_syborg_nvmemory ); |
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/** |
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* Create a non volatile memory array object. |
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* |
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* @param a_sectorsize Size for the sector. |
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* @return An object of class SyborgNVMemory. |
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*/ |
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NVMEMORY_API SyborgNVMemory * nvmem_create( uint32_t a_sectorsize = NVMEM_DEFAULT_SECTORSIZE_IN_BYTES); |
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/** |
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* Create a non volatile memory array. A raw image will be created to host filesystem which will |
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* act as a non volatile memory device in client point of view. |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_memoryarrayname Name for the image to be created. |
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* @param a_sectorcount Image size in sectors. |
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* @param a_sectorsize size for the sector. |
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* @return An error code. |
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*/ |
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NVMEMORY_API int32_t nvmem_create_image( SyborgNVMemory* a_syborg_nvmemory, char* a_memoryarrayname, uint32_t a_sectorcount, uint32_t a_sectorsize = NVMEM_DEFAULT_SECTORSIZE_IN_BYTES ); |
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/** |
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* Create handle to an image |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_memoryarrayname Name and path for the image to be opened. |
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* @return Handle to a non volatile memory array. |
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*/ |
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NVMEMORY_API int32_t nvmem_open( SyborgNVMemory* a_syborg_nvmemory, char* a_memoryarrayname ); |
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/** |
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* Close handle to a non volatile memory array |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_memoryarrayhandle Handle to be closed. |
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* @return Error code. |
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*/ |
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NVMEMORY_API int32_t nvmem_close( SyborgNVMemory* a_syborg_nvmemory, int32_t a_memoryarrayhandle ); |
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/** |
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* Flush possible cached content of a non volatile memory array |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_memoryarrayhandle Handle pointing to stream which is flushed to a file. |
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* @return Error code. |
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*/ |
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NVMEMORY_API int32_t nvmem_flush( SyborgNVMemory* a_syborg_nvmemory, int32_t a_memoryarrayhandle ); |
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/** |
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* Read from a non volatile memory array to a guest os application memory space |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_client_targetmemoryaddr Host OS address pointing to a place to where the data read should be returned. |
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* @param a_memoryarrayhandle Handle to the device image. |
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* @param a_memoryarrayoffset Sector offset to a position from where the data is to be read. |
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* @param a_sectorcount Amount of sectors to be read. |
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* @return Error code. |
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*/ |
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NVMEMORY_API void nvmem_read( SyborgNVMemory* a_syborg_nvmemory, uint32_t *a_client_targetmemoryaddr, int32_t a_memoryarrayhandle, uint32_t a_memoryarrayoffset, uint32_t a_sectorcount ); |
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/** |
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* Write to a non volatile memory array from a guest os application memory space |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_client_sourcememoryaddr Host OS address pointing to a place to where to get the data for write operation. |
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* @param a_memoryarrayhandle Handle to the device image. |
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* @param a_memoryarrayoffset Sector offset to a position to where the data is to be written. |
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* @param a_sectorcount Amount of sectors to be written. |
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* @return Error code. |
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*/ |
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NVMEMORY_API void nvmem_write( SyborgNVMemory* a_syborg_nvmemory, uint32_t *a_client_sourcememoryaddr, int32_t a_memoryarrayhandle, uint32_t a_memoryarrayoffset, uint32_t a_sectorcount ); |
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/** |
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* Get the size of a non volatile memory array |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param a_memoryarrayhandle Handle to the device image. |
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* @return Total amount of sectors of the device. |
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*/ |
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NVMEMORY_API uint32_t nvmem_get_sector_count( SyborgNVMemory* a_syborg_nvmemory, int32_t a_memoryarrayhandle ); |
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/** |
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* Store callback |
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* |
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* @param a_syborg_nvmemory an object of class SyborgNVMemory. |
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* @param aGraphicsCallBack pointer to a callback function. |
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* @return TODO an error if fails. |
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*/ |
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NVMEMORY_API int32_t nvmem_set_callback( SyborgNVMemory* a_syborg_nvmemory, int (*aGraphicsCallBack) (int) ); |
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} |
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class NVMEMORY_API SyborgNVMemory |
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{ |
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public: |
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SyborgNVMemory( uint32_t a_sectorsize = NVMEM_DEFAULT_SECTORSIZE_IN_BYTES ); |
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~SyborgNVMemory( ); |
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/** |
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* Reset the device |
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*/ |
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int32_t NVMemReset( ); |
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/** |
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* Create a non volatile memory array. A raw image will be created to host filesystem which will |
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* act as a non volatile memory device in client point of view. |
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*/ |
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int32_t NVMemCreateImage( char* a_memoryarrayname, uint32_t a_sectorcount, uint32_t a_sectorsize = NVMEM_DEFAULT_SECTORSIZE_IN_BYTES ); |
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/** |
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* Return handle to a non volatile memory array |
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*/ |
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int32_t NVMemOpen( char* a_memoryarrayname ); |
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/** |
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* Close handle to a non volatile memory array |
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*/ |
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int32_t NVMemClose( int32_t a_memoryarrayhandle ); |
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/** |
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* Flush possible cached content of a non volatile memory array |
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*/ |
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int32_t NVMemFlush( int32_t a_memoryarrayhandle ); |
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/** |
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* Read from a non volatile memory array to a guest os application memory space |
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*/ |
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void NVMemRead( uint32_t *a_client_targetmemoryaddr, int32_t a_memoryarrayhandle, uint32_t a_memoryarrayoffset, uint32_t a_sectorcount ); |
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/** |
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* Write to a non volatile memory array from a guest os application memory space |
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*/ |
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void NVMemWrite( uint32_t *a_client_sourcememoryaddr, int32_t a_memoryarrayhandle, uint32_t a_memoryarrayoffset, uint32_t a_sectorcount ); |
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/** |
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* Get the size of a non volatile memory array |
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*/ |
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uint32_t NVMemGetSectorCount( int32_t a_memoryarrayhandle ); |
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/** |
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* Store callback |
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*/ |
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int32_t NVMemSetCallback( int (*aNVMemCallBack) (int) ); |
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private: |
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FILE *i_filestream[NVMEM_MAX_STREAMHANDLES]; |
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uint32_t iNVMemSectorSizeInBytes; |
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int (*i_NVMemCallBack)(int); |
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}; |
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#endif // _NVMEMORY_H |