Linux内核移植简记

  *************************************************************** Linux：2.6.30.4 编译器：4.3.3 硬件平台：S3C2440 ***************************************************************         1.下载Linux内核                  ftp://ftp.kernel.org/pub/linux/kernel/  ------>V2.6(文件夹)------>linux-2.6.30.4.tar.gz 或者（linux-2.6.30.4.tar.bz2）         2.解压Linux内核                 tar -zxvf  linux-2.6.30.4.tar.gz -C   /目录                 或者 tar xvfj  linux-2.6.30.4.tar.bz2   -C  /目录         3.添加对arm的支持                 修改解压后linux源码包中的Makefile文件，（约193行） 修改为：                 ARCH    = arm                 CROSS_COMPILE     = arm-linux-         4.修改arm的运行时钟（个人觉得不改可能会影响与时钟参数有关设备，如串口等）                 修改 arch/arm/mach-s3c2440/mach-smdk2440.c 文件中第163行  修改为：                 s3c24xx_init_clocks(12000000);     (原始值为：16934400)         5.修改系统配置                 make menuconfig  弹出配置菜单项（需要启动编译器支持功能：source  /etc/profile   (需先配置profile文件)）                 5.1  选择“Load an Alternate Configuration File”---> Enter                        .config---修改为--->arch/arm/configs/s3c2410_defconfig   (添加s3c2440 的默认配置) --->退出到主菜单                            5.2 选择“System Type”--->                         S3C2440 Machines--->配置如下                             [ ]Simtec Electronic ANUBIS                             [ ]Simtec IM2440D20（OSIRIS）module                             [ ]HP iPAQ rx3715                             [*]SMDK 2440                             [ ]NexVision NEXCODER 2440 Light Board                             [*]SMDK2440 With S3C2440 CPU Module                             [ ]Avantech AT2440EVB development Board                 5.3 选择“General Setup”--->配置如下                         (-EmbedSky)Local version -append to kernel release(天嵌出的驱动模块在加载时会校验该信息)                         (17)kernel log buffer size                 5.4 选择“Kernel Feature”--->配置如下（编译器是4.3.3的版本需要添加，低版本不需添加配置）                         [*]USE the ARM EABI to Compile the kernel                         [*]Allow old ABI binaries to run with this kern（EXPERIMENTAL）（NEW）                         [ ]Add LRU List to track non-evictable pages                 5.5 选择“Device Drivers”--->配置如下    (修改NandFlash配置，其他驱动先不管)                         <*> Memory Technology Device（MTD）Support------>                                    < >RedBoot partition table parsing                                     [ ]Command line partition table parsing                                     <*>NAND Device Support ------>                                                 [ ]S3C2440 NAND Hardware ECC (有的资料建议选择该项，这里先不先Flash校验)                 5.6 选择“Save an Alternate Configuration File”------>                          保存为 .config文件，保存后退出。         6.修改机器码                 修改arch/arm/tools/mach-types文件中的第379行，修改后如下(将原始值362修改为168)                 S3C2440  ARCH_S3C2440 S3C2440 168                 注：这里需要将机器码修改和U-boot中的机器码一样，也可将U-boot中修改和这里的一样         7.修改Flash配置                 修改 arch/arm/plat-s3c24xx/common-smdk.c  (约109行)                 static struct mtd-patition smdk_default_nand_part[ ]={                         [0] = {   .name = "U-Boot",                                     .size = 0x00040000,                                     .offset = 0, }                         [1] = {   .name = "Kernel",                                     .size = 0x00300000,                                     .offset = 0x00200000, }                         [2] = {   .name = "yaffs2",                                     .size = MTDPART_SIZ_FULL,    //默认是剩余空间                                     .offset = 0x00500000, }                          }        //注：空间分配也可自己定义   [3]\[4]\[5]\[6]\[7]几项可以删除                 修改 NandFlash操作时间，时间可以自己设定（这项可以不改）  （约165行）         8.修改软件中的NandFlash校验设置                 修改 drivers/mtd/nand/s3c2410.c   (约 752行)  修改为                 chip-ecc.mode = NAND_ECC_NONE;        //原始值 NAND_ECC_SOFT;         9.编译内核                 make zImage                 之后会在arch/arm/boot目录下面生成 zImage                 到此可以编译支持S3C2440处理器的基本内核（不带驱动，不支持yaffs2文件系统）。 ---------------------------------------------------------------------------------------------------------------------------------         以下是添加Linux对yaffs2文件系统的支持功能         1.下载yaffs2补丁包                 下载 CVS-root.tar.gz------>解压  tar xvfz cvs-root.tar.gz--->进入解压后的文件，进入到 yaffs2 文件夹下执行                 ./patch-ker.sh c /linux安装目录下面                 执行后在Linux的fs目录下发现多了yaffs2目录，同时fs下面的Kconfig和Makefile文件中添加了对yaffs2的支持         2.配置Linux对文件系统的支持                 make menuconfig                 File System---> 配置如下                         < >second Extended fs support                          < >Ext3 journalling file system support                         < >Kernel automounter support                         < >Kernel automounter version (aslo supports V3)                         < >FUSE (Filesystem in Userspace) support                                 CD-ROM/DVD Filesystem------>                                         [ ] Microsoft Joliet CDROM extensions                                         < >UDF file system support                                 DOS/FAT/NT Filesystems------>                                         < >NTFS file system support                                 Pseudo filesystems------>                                         [ ]Tmpfs POSIX Access Control Lists                                         <*>Userspace-driven configuration filesystem                         <*> Miscellaneous filesystems------>                                 <*> YAFFS2 file system support(NEM)                                 [ ]Cache short names in RAM (NEW)                         -*- Native Language support                                 <*> Simplified Chinese charset (CP936,GB2312)                                 <*>NLS UTF-8             保存设置  “Save an Alternate Configuration File”------>保存为 .config 文件             make zImage             即可生成支持 YAFFS2文件系统的Linux内核了！