patch.txt

nand boot ,支持２Ｋ大页面的读写。

之前提供了2K大页面的WINCE5.0/4.2的驱动源码,并告知了eboot的修改，可能又很多网友是从nand flash启动的，nboot也需要修改，现在一并把源码发上来，与之前的驱动配套使用，nboot中有nand.h，选相应的FLASH类型设为1，如果都为0，则表示nboot只能用于小页面的K9S1208,否则就是2K大页面的，
#define K9F1G08_SUPPORT    (0)
#define K9F2G08_SUPPORT    (0)
#define K9F4G08_SUPPORT    (1) /*选定512M的*/
#define K9F8G08_SUPPORT    (0)
在NBOOT中只能设定一种FLASH类型，不支持动态识别,因为代码大小限制的原因，我不能把他们的处理接口同时编译进来，会超出4K的代码限制。
把该NBOOT解压到你的SMDK2440/目录下，它编译的时候会找loader.h，请确认是否能找到。



2440loader.c中存在一个bug,有个全局变量
TOC toc;
这个结构大小是512字节的，但把它的地址传入FMD_ReadSector(TOC_SECTOR,
                (LPBYTE)&toc,
                NULL, 1)
对于2K大页面的FLASH，它会越界，可能引起问题，建议修改如下：
BYTE toc[2048];
TOC *ptoc=(TOC *)toc; // made global because it's too big for our tiny stack

DWORD
ReadImageFromNand(DWORD dwEntry, DWORD dwSig)
{
  DWORD dwSectorsNeeded;
  DWORD dwSector, dwLength;       // Start Sector & Length
  DWORD dwRAM, i;

  if ( !FMD_ReadSector(TOC_SECTOR,
                (LPBYTE)ptoc,
                NULL, 1) )
  {
    Uart_SendString("ERR_DISK_OP_FAIL1\n");
    return ERR_DISK_OP_FAIL1;
  }

  if ( !VALID_TOC(ptoc) ) {
    Uart_SendString("ERR_INVALID_TOC: ");
    Uart_SendDWORD(ptoc->dwSignature, TRUE);
    return ERR_INVALID_TOC;
  }

  if ( !(ptoc->id[dwEntry].dwImageType & IMAGE_TYPE_RAMIMAGE) ) {
    Uart_SendString("ERR_INVALID_FILE_TYPE: ");
    Uart_SendDWORD(ptoc->id[dwEntry].dwImageType, TRUE);
    return ERR_INVALID_FILE_TYPE;
  }

// ??
//   if ( !(toc.id[dwEntry].dwImageType & IMAGE_TYPE_BINFS) ) {
//     dwSectorsNeeded = toc.id[dwEntry].dwTtlSectors;
//   } else {
    dwSectorsNeeded = ptoc->id[dwEntry].dwTtlSectors;        // xipkernel size = 0x9B4
//   }
   
   Uart_SendString("Sector addr on NAND: ");
   Uart_SendDWORD(ptoc->id[dwEntry].sgList[0].dwSector, TRUE);
  Uart_SendString("TotalSector: ");
  Uart_SendDWORD(dwSectorsNeeded, TRUE);

  dwRAM   = VIRTUAL_TO_PHYSICAL(ptoc->id[dwEntry].dwLoadAddress);

  JumpAddr = ptoc->id[dwEntry].dwJumpAddress ? VIRTUAL_TO_PHYSICAL(ptoc->id[dwEntry].dwJumpAddress) :
                              VIRTUAL_TO_PHYSICAL(ptoc->id[dwEntry].dwLoadAddress);
                              
  //
  // Load the disk image directly into RAM
  // BUGBUG: recover from read failures
  //
   Uart_SendString("Reading Kernel Image from NAND\r\n");
  i = 0;
   while (dwSectorsNeeded && i < MAX_SG_SECTORS)
   {
    dwSector = ptoc->id[dwEntry].sgList.dwSector;
    dwLength = ptoc->id[dwEntry].sgList.dwLength;

       Uart_SendString("   dwSector: ");
       Uart_SendDWORD(dwSector, TRUE);
       Uart_SendString("   dwLength: ");
       Uart_SendDWORD(dwLength, TRUE);
       Uart_SendString("   dwRAM: ");
       Uart_SendDWORD(dwRAM, TRUE);

    // read each sg segment
    while (dwLength) {
        if ( !FMD_ReadSector(dwSector,
                    (LPBYTE)dwRAM,
                    NULL, 1) )
        {
          Uart_SendString("ERR_DISK_OP_FAIL2: ");
          Uart_SendDWORD(dwSector, TRUE);

             dwSector++;
               continue;

//           return ERR_DISK_OP_FAIL2;
        }
        
         dwSector++;
         dwLength--;
        dwRAM += SECTOR_SIZE;
    }

    dwSectorsNeeded -= ptoc->id[dwEntry].sgList.dwLength;
    i++;
  }

  // We only do this if the dwRAM is not zero (The default tocblock1 
  // set the dwRAM to be 0)
  if (ptoc->chainInfo.dwLoadAddress == 0) {
    return ERR_SUCCESS;
  }

  // Load the Chain.bin stored on NAND to the SDRAM
//    if ( toc.id[dwEntry].dwImageType == 6 )        // For WinCE 4.2 Image
//    if ( 1 )        // For WinCE 4.2 Image
//    {
//        dwRAM = VIRTUAL_TO_PHYSICAL(toc.id[dwEntry].dwLoadAddress);
//        dwSectorsNeeded = toc.id[dwEntry].sgList->dwLength;
//        dwSector = toc.id[dwEntry].sgList->dwSector;
//    }
//    else
   {
       dwRAM = VIRTUAL_TO_PHYSICAL(ptoc->chainInfo.dwLoadAddress);        // 0x303c0000
       dwSectorsNeeded = ptoc->chainInfo.dwLength;                        // 0x20
       dwSector = ptoc->chainInfo.dwFlashAddress;                        // 0x103c0

//        dwSectorsNeeded = 0x20;
//        dwSector = 0x104C0;
   }