S5PV210 SD卡启动流程分析

?0.?在S5PV210.dat允许SD启动 1.?初始化并进入到OEMPlatformInit ?1.1?SDHC_INIT(SDMMCDRV.c) ??全局变量初始化->内存映射->... ?1.2? ?BP_Init ??Sets up locations for various objects in memory provided by caller ??全部变量g_FlashInfo、g_partStateTable...等初始化。? ?1.3?FMD_GetInfo ??Provides information on the NAND flash ??pFlashInfo等全局变量初始化 ?1.4?TOC_Read（NAND.CPP） ??Try to retrieve TOC (and Boot config) from boot media ??1.4.1? TOC_Init ???1.4.1.1? BootConfigInit ?????? Set default boot configuration values，g_pBootCfg初始化 ??1.4.2? TOC_Write ?1.5?SetCPUClock() ?1.6?OEMPMICInit() ?1.7?InitializeDisplay() 2.?OEMPreDownload ?根据g_bDownloadImage返回跳转或下载 3?DownloadImage ?根据第2步返回的为下载进入此函数 ?3.1?GetImageType ??从内存中获得前七个字节（假设SD卡中的NK.BIN已经搬入内存中） ?3.2? 根据3.1得到的类型进行下载 ??3.2.1 DownloadSignedBin（其中一个是Bin类型） ???3.2.1.1 memset（） ????? Clearing memory ensures no garbage between sparse .bin records,so that ?? ????? our post-download checksum will be accurate. ???3.2..1.2 OEMIsFlashAddr ?????? 判断是否为Flash地址 ???3.2.1.3? OEMStartEraseFlash ????? 擦除Flash ???3.2.1.4 OEMReadData (RANDOM_SEED_LENGTH,(LPBYTE) &packetData.bRandomSeed) ????? read random seed at start of signed .bin file ???3.2.1.5? OEMReadData （...） Download signed packets (.bin records or record chunks) ???3.2.1.6? OEMReadData （...） Read the .bin record header ???... ... ???3.2.1.7?? ComputeChecksum ???3.2.1.8?? WriteImageToFlash(FLASH.c) ??????? 3.2.1.8.1?? OEMWriteFlash(FLASH.c)->WriteFlashNK ??????? ??3.2.1.8.1.1?(NOSDBOOT) ????????FMD_ReadSector(NOSDBOOT) ????????BP_LowLevelFormat ????????BP_OpenPartition ????????BP_GetPartitionInfo ????????EraseBlocks ????????FMD_WriteSector ????????BP_SetDataPointer ????????BP_WriteData ????????TOC_Write ??????3.2.1.8.1.2?(SDBOOT) ????????FMD_ReadSector(NOSDBOOT) ????????BP_LowLevelFormat ????????BP_OpenPartition ????????BP_GetPartitionInfo ????????EraseBlocks ????????FMD_WriteSector ????????BP_OpenPartition ????????BP_Storage_Init ????????BP_OpenStoragePartition ????????SDHC_WRITE ????????BP_SetDataPointer ????????BP_WriteData ????????TOC_Write 4.? 根据第2步得到的类型进行跳转