www.pudn.com > iMx31_WCE600.rar > nor.c

//----------------------------------------------------------------------------- 
// 
//  Use of this source code is subject to the terms of the Microsoft end-user 
//  license agreement (EULA) under which you licensed this SOFTWARE PRODUCT. 
//  If you did not accept the terms of the EULA, you are not authorized to use 
//  this source code. For a copy of the EULA, please see the LICENSE.RTF on 
//  your install media. 
// 
//----------------------------------------------------------------------------- 
// 
//  Copyright (C) 2004-2007, Freescale Semiconductor, Inc. All Rights Reserved. 
//  THIS SOURCE CODE, AND ITS USE AND DISTRIBUTION, IS SUBJECT TO THE TERMS 
//  AND CONDITIONS OF THE APPLICABLE LICENSE AGREEMENT 
// 
//----------------------------------------------------------------------------- 
// 
//  File:  nor.c 
// 
//  Contains BOOT NOR flash support functions. 
// 
//----------------------------------------------------------------------------- 
#include "bsp.h" 
#include "loader.h" 
#pragma warning(push) 
#pragma warning(disable: 4115) 
#include  
#pragma warning(pop) 
 
//----------------------------------------------------------------------------- 
// External Functions 
 
 
//----------------------------------------------------------------------------- 
// External Variables 
 
 
//----------------------------------------------------------------------------- 
// Defines 
 
 
//----------------------------------------------------------------------------- 
// Types 
 
 
//----------------------------------------------------------------------------- 
// Global Variables 
 
 
//----------------------------------------------------------------------------- 
// Local Variables 
 
 
//----------------------------------------------------------------------------- 
// Local Functions 
 
 
//----------------------------------------------------------------------------- 
// 
//  Function:  NORWrite 
// 
//  This function writes to NOR flash memory the OS image stored  
//  in the RAM file cache area. 
// 
//  Parameters: 
//      dwStartAddr  
//          [in] Address in flash memory where the start of the downloaded  
//          OS image is to be written. 
// 
//      dwLength  
//          [in] Length of the OS image, in bytes, to be written to flash 
//          memory.             
// 
//  Returns: 
//      TRUE indicates success. FALSE indicates failure. 
//----------------------------------------------------------------------------- 
BOOL NORWrite(DWORD dwStartAddr, DWORD dwLength) 
{ 
    BOOL rc = FALSE; 
    int nBlocks, i; 
    OAL_FLASH_INFO info; 
    DWORD BlockSize, dwOffset; 
    UINT32 percentComplete, lastPercentComplete; 
    VOID *pFlashBase = (VOID *) OALPAtoUA(IMAGE_BOOT_NORDEV_NOR_PA_START); 
    VOID *pBuffer = (VOID *) OEMMapMemAddr(dwStartAddr, dwStartAddr); 
 
    // Read NOR CFI info 
    if (!OALFlashInfo(pFlashBase, &info)) { 
        KITLOutputDebugString("ERROR: OALFlashErase failed get flash memory info\r\n"); 
        goto cleanUp; 
    } 
 
    // Find the largest block size on the device.  We will use 
    // this later for erase/write operations so that we can show 
    // progress. 
    BlockSize = 0; 
    for (i=0; i<(int)info.regions; i++) 
    { 
        if (info.aBlockSize[i] * info.parallel > BlockSize) 
            BlockSize = info.aBlockSize[i] * info.parallel; 
    } 
    if (BlockSize == 0) 
    { 
        goto cleanUp; 
    } 
 
    // Determine how many blocks to write 
    // Note: This assumes we always start at the beginning of a block 
    nBlocks = (dwLength + BlockSize - 1) / BlockSize; 
 
    // Fill unused space with 0xFF 
    memset((VOID *) ((DWORD) pBuffer + dwLength), 0xFF, (nBlocks * BlockSize) - dwLength); 
 
    KITLOutputDebugString("INFO:  Programming image into NOR flash.\r\n"); 
 
    // Keep track of image offset (incremented by block size for each programmed block) 
    dwOffset = 0; 
 
    lastPercentComplete = 0; 
 
    // Program (erase then write) the flash blocks 
    for (i=0; i