现在应该很少运用2.6.14的内核了，但由于项目需求，最近移植了2.6.版别的内核到S3C2440上，并移植了CS8900网卡驱动(网卡驱动移植参阅http://blog.csdn.net/ce123/article/details/8424399)。之所以移植网卡驱动，是因为yaffs2格局的文件体系一向挂载不成功，发动后的错误信息如下：
Freeing init memory: 92K
Failed to execute /linuxrc. Attempting defaults…
Kernel panic – not syncing: No init found. Try passing init= option to kernel.
1.顶层Makefile的修正
print?
- ARCH?=arm
- CROSS_COMPILE?=arm-linux-
穿插编译器的运用请参阅http://blog.csdn.net/ce123/article/details/8333421
2.修正时钟频率
print?
- staticvoid__initsmdk2440_map_io(void)
- {
- s3c24xx_init_io(smdk2440_iodesc,ARRAY_SIZE(smdk2440_iodesc));
- s3c24xx_init_clocks(12000000);//12M
- s3c24xx_init_uarts(smdk2440_uartcfgs,ARRAY_SIZE(smdk2440_uartcfgs));
- s3c24xx_set_board(&smdk2440_board);
- }
3.修正机器ID
4.设置Nand Flash分区
4.1树立Nand Flash分区表
print?
- #include
- #include
- #include
- /*NANDparititon*/
- staticstructmtd_partitionsmdk_default_nand_part[]={
- [0]={
- .name=”Board_uboot”,
- .offset=0x00000000,
- .size=0x00080000,
- },
- [1]={
- .name=”Board_kernel”,
- .offset=0x00240000,
- .size=0x00200000,
- },
- [2]={
- .name=”Board_yaffs2″,
- .offset=0x00440000,
- .size=0x0FB40000,
- }
- };
name：代表分区姓名
offset：代表flash分区的开端地址(相对于0x0的偏移)
区分3个区，别离寄存uboot， kernel和文件体系。
4.2.参加Nand Flash分区
print?
- staticstructs3c2410_nand_setsmdk_nand_sets[]={
- [0]={
- .name=”NAND”,
- .nr_chips=1,
- .nr_partitions=ARRAY_SIZE(smdk_default_nand_part),
- .partitions=smdk_default_nand_part,
- },
- };
nr_partitions： 指明partition_info中界说的分区数目
partitions：分区信息表
4.3.树立Nand Flash芯片支撑
print?
- staticstructs3c2410_platform_nandsmdk_nand_info={
- .tacls=20,
- .twrph0=60,
- .twrph1=20,
- .nr_sets=ARRAY_SIZE(smdk_nand_sets),
- .sets=smdk_nand_sets,
- };
tacls，twrph0，twrph1的意思见S3C2440的数据手册，这3个值最终会被设置到NFCONF中。
sets：支撑的分区集
nr_set：分区集的个数
4.4.参加Nand Flash芯片支撑到Nand Flash驱动
print?
- structplatform_devices3c_device_nand={
- .name=”s3c2410-nand”,
- .id=-1,
- .num_resources=ARRAY_SIZE(s3c_nand_resource),
- .resource=s3c_nand_resource,
- .dev={
- .platform_data=&smdk_nand_info
- }
- };
id：有用设备编号，假如只要仅有的一个设备为-1，有多个设备从0开端计数.
num_resource：有几个寄存器区
resource：寄存器区数组首地址
dev：支撑的Nand Flash设备
4.5指定发动时初始化
print?
- staticstructplatform_device*smdk2440_devices[]__initdata={
- &s3c_device_usb,
- &s3c_device_lcd,
- &s3c_device_wdt,
- &s3c_device_i2c,
- &s3c_device_iis,
- &s3c_device_nand,//增加
- };
5.制止Flash ECC校验
print?
- chip->eccmode=NAND_ECC_NONE;
6.支撑devfs
print?
- configDEVFS_FS
- bool”/devfilesystemsupport(OBSOLETE)”
- dependsonEXPERIMENTAL
- help
- Thisissupportfordevfs,avirtualfilesystem(like/proc)which
- providesthefilesysteminterfacetodevicedrivers,normallyfound
- in/dev.Devfsdoesnotdependonmajorandminornumber
- allocations.Devicedriversregisterentriesin/devwhichthen
- appearautomatically,whichmeansthatthesystemadministratordoes
- nothavetocreatecharacterandblockspecialdevicefilesinthe
- /devdirectoryusingthemknodcommand(orMAKEDEVscript)anymore.
- Thisisworkinprogress.Ifyouwanttousethis,you*must*read
- thematerialin
- thefileREADMEthere.
- Notethatdevfsnolongermanages/dev/pts!IfyouareusingUNIX98
- ptys,youwillalsoneedtomountthe/dev/ptsfilesystem(devpts).
- Notethatdevfshasbeenobsoletedbyudev,
- Ithasbeenstrippeddowntoabareminimumandisonlyprovidedfor
- legacyinstallationsthatuseitsnamingschemewhichis
- unfortunatelydifferentfromthenamesnormalLinuxinstallations
- use.
- Ifunsure,sayN.
- configDEVFS_MOUNT
- bool”Automaticallymountatboot”
- dependsonDEVFS_FS
- help
- ThisoptionappearsifyouhaveCONFIG_DEVFS_FSenabled.Setting
- thistoYwillmakethekernelautomaticallymountdevfsonto/dev
- whenthesystemisbooted,beforetheinitthreadisstarted.
- Youcanoverridethiswiththe”devfs=nomount”bootoption.
- Ifunsure,sayN.
- configDEVFS_DEBUG
- bool”Debugdevfs”
- dependsonDEVFS_FS
- help
- IfyousayYhere,thenthe/devfilesystemcodewillgenerate
- debuggingmessages.Seethefile
- details.
- Ifunsure,sayN.
- configDEVPTS_FS_XATTR
- bool”/dev/ptsExtendedAttributes”
- dependsonUNIX98_PTYS
- help
- Extendedattributesarename:valuepairsassociatedwithinodesby
- thekernelorbyusers(seetheattr(5)manualpage,orvisit
- Ifunsure,sayN.
- configDEVPTS_FS_SECURITY
- bool”/dev/ptsSecurityLabels”
- dependsonDEVPTS_FS_XATTR
- help
- Securitylabelssupportalternativeaccesscontrolmodels
- implementedbysecuritymoduleslikeSELinux.Thisoption
- enablesanextendedattributehandlerforfilesecurity
- labelsinthe/dev/ptsfilesystem.
- Ifyouarenotusingasecuritymodulethatrequiresusing
- extendedattributesforfilesecuritylabels,sayN.
- configTMPFS
- bool”Virtualmemoryfilesystemsupport(formershmfs)”
- help
- Tmpfsisafilesystemwhichkeepsallfilesinvirtualmemory.
- Everythingintmpfsistemporaryinthesensethatnofileswillbe
- createdonyourharddrive.Thefilesliveinmemoryandswap
- space.Ifyouunmountatmpfsinstance,everythingstoredthereinis
- lost.
- See
7.内核裁剪
7.1内核装备文件
cp arch/arm/configs/s3c2410_defconfig .config
make menuconfig 将s3c2410_defconfig 导入，在s3c2410_defconfig基础上，裁剪内核。
7.2内核选项
[*] Enable loadable module support
[*] Automatic kernel module loading
System Type >
[*] S3C2410 DMA support
Floating point emulation >
[*] NWFPE math emulation
接下来要做的是对内核MTD子体系的设置
Device Drivers >
Memory Technology Devices (MTD) >
[*] MTD partitioning support /*支撑MTD分区，这样咱们在前面设置的分区才有含义*/
[*] Command line partition table parsing /*支撑从命令行设置flash分区信息，灵敏*/
RAM/ROM/Flash chip drivers >
<*> Detect flash chips by Common Flash Interface (CFI) probe
<*> Detect nonCFI AMD/JEDECcompatible flash chips
<*> Support for Intel/Sharp flash chips
<*> Support for AMD/Fujitsu flash chips
<*> Support for ROM chips in bus mapping
NAND Flash Device Drivers >
<*> NAND Device Support
<*> NAND Flash support for S3C2410/S3C2440 SoC
Character devices >
[*] Nonstandard serial port support
[*] S3C2410 RTC Driver
接下来做的是针对文件体系的设置
File systems >
<> Second extended fs support #去除对ext2的支撑
Pseudo filesystems >
[*] /proc file system support
[*] Virtual memory file system support (former shm fs)
[*] /dev file system support (OBSOLETE)
[*] Automatically mount at boot (NEW)
这里会看到咱们前先修正fs/Kconfig的效果，devfs现已被支撑上了
Miscellaneous filesystems >
Network File Systems >
<*> NFS file system support
