支持2K大页面NAND FLASH驱动的NBOOT改进源码

来自http://bbs.driverdevelop.com/read.php?tid-98338.html                         感谢zhengshijie

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：
代码 
  1 BYTE toc[2048];
  2 TOC *ptoc=(TOC *)toc; // made global because it's too big for our tiny stack
  3  
  4 DWORD
  5 ReadImageFromNand(DWORD dwEntry, DWORD dwSig)
  6 {
  7   DWORD dwSectorsNeeded;
  8   DWORD dwSector, dwLength;       // Start Sector & Length
  9    DWORD dwRAM, i;
 10 
 11   if ( !FMD_ReadSector(TOC_SECTOR,
 12                 (LPBYTE)ptoc,
 13                 NULL, 1) )
 14   {
 15     Uart_SendString("ERR_DISK_OP_FAIL1\n");
 16     return ERR_DISK_OP_FAIL1;
 17   }
 18 
 19   if ( !VALID_TOC(ptoc) ) {
 20     Uart_SendString("ERR_INVALID_TOC: ");
 21     Uart_SendDWORD(ptoc->dwSignature, TRUE);
 22     return ERR_INVALID_TOC;
 23   }
 24 
 25   if ( !(ptoc->id[dwEntry].dwImageType & IMAGE_TYPE_RAMIMAGE) ) {
 26     Uart_SendString("ERR_INVALID_FILE_TYPE: ");
 27     Uart_SendDWORD(ptoc->id[dwEntry].dwImageType, TRUE);
 28     return ERR_INVALID_FILE_TYPE;
 29   }
 30 
 31  // ??
 32  //   if ( !(toc.id[dwEntry].dwImageType & IMAGE_TYPE_BINFS) ) {
 33  //     dwSectorsNeeded = toc.id[dwEntry].dwTtlSectors;
 34  //   } else {
 35      dwSectorsNeeded = ptoc->id[dwEntry].dwTtlSectors;        // xipkernel size = 0x9B4
 36  //   }
 37     
 38    Uart_SendString("Sector addr on NAND: ");
 39    Uart_SendDWORD(ptoc->id[dwEntry].sgList[0].dwSector, TRUE);
 40   Uart_SendString("TotalSector: ");
 41   Uart_SendDWORD(dwSectorsNeeded, TRUE);
 42 
 43   dwRAM   = VIRTUAL_TO_PHYSICAL(ptoc->id[dwEntry].dwLoadAddress);
 44 
 45   JumpAddr = ptoc->id[dwEntry].dwJumpAddress ? VIRTUAL_TO_PHYSICAL(ptoc->id[dwEntry].dwJumpAddress) :
 46                               VIRTUAL_TO_PHYSICAL(ptoc->id[dwEntry].dwLoadAddress);
 47                               
 48   //
 49   // Load the disk image directly into RAM
 50   // BUGBUG: recover from read failures
 51   //
 52     Uart_SendString("Reading Kernel Image from NAND\r\n");
 53   i = 0;
 54    while (dwSectorsNeeded && i < MAX_SG_SECTORS)
 55    {
 56     dwSector = ptoc->id[dwEntry].sgList.dwSector;
 57     dwLength = ptoc->id[dwEntry].sgList.dwLength;
 58 
 59        Uart_SendString("   dwSector: ");
 60        Uart_SendDWORD(dwSector, TRUE);
 61        Uart_SendString("   dwLength: ");
 62        Uart_SendDWORD(dwLength, TRUE);
 63        Uart_SendString("   dwRAM: ");
 64        Uart_SendDWORD(dwRAM, TRUE);
 65 
 66     // read each sg segment
 67      while (dwLength) {
 68         if ( !FMD_ReadSector(dwSector,
 69                     (LPBYTE)dwRAM,
 70                     NULL, 1) )
 71         {
 72           Uart_SendString("ERR_DISK_OP_FAIL2: ");
 73           Uart_SendDWORD(dwSector, TRUE);
 74 
 75              dwSector++;
 76                continue;
 77 
 78  //           return ERR_DISK_OP_FAIL2;
 79          }
 80         
 81          dwSector++;
 82          dwLength--;
 83         dwRAM += SECTOR_SIZE;
 84     }
 85 
 86     dwSectorsNeeded -= ptoc->id[dwEntry].sgList.dwLength;
 87     i++;
 88   }
 89 
 90   // We only do this if the dwRAM is not zero (The default tocblock1 
 91   // set the dwRAM to be 0)
 92    if (ptoc->chainInfo.dwLoadAddress == 0) {
 93     return ERR_SUCCESS;
 94   }
 95 
 96   // Load the Chain.bin stored on NAND to the SDRAM
 97  //    if ( toc.id[dwEntry].dwImageType == 6 )        // For WinCE 4.2 Image
 98  //    if ( 1 )        // For WinCE 4.2 Image
 99  //    {
100  //        dwRAM = VIRTUAL_TO_PHYSICAL(toc.id[dwEntry].dwLoadAddress);
101  //        dwSectorsNeeded = toc.id[dwEntry].sgList->dwLength;
102  //        dwSector = toc.id[dwEntry].sgList->dwSector;
103  //    }
104  //    else
105    {
106        dwRAM = VIRTUAL_TO_PHYSICAL(ptoc->chainInfo.dwLoadAddress);        // 0x303c0000
107        dwSectorsNeeded = ptoc->chainInfo.dwLength;                        // 0x20
108        dwSector = ptoc->chainInfo.dwFlashAddress;                        // 0x103c0
109 
110 //        dwSectorsNeeded = 0x20;
111 //        dwSector = 0x104C0;
112    }

 

posted on 2010-05-02 10:29  EmbeddedBoy_jsu_xtw  阅读(639)  评论(0)    收藏  举报

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