S3C6410移植linux kernel 2.6.36步骤

S3C6410移植linux kernel 2.6.36步骤

Author: Xiaoyong Wen, [email protected]

Data: 2012-6-16

 

Version history

Index	Version	Author	Date	Comment
1	V1.0.0	Xiaoyong Wen	2012-6-16	Draft

 

目录

S3C6410移植linuxkernel 2.6.36步骤... 1

Version history. 1

目录... 2

1. 获取linux kernel 2.6.36. 3

2. 修改machineID.. 3

3. 复制linuxkernel配置文件.config. 4

4. 配置CPUtype. 4

5. 配置nfs引导rootfs. 4

5.1 先配置TCP/IP网络支持... 4

5.2 配置DM9000NIC driver5

5.3 配置nfsclient5

5.4 配置可抢占功能... 5

5.5 U-boot命令行配置... 5

6. 配置rootfs. 6

7. 未解决的问题... 7

 

1. 获取linux kernel 2.6.36

URL：http://www.kernel.org/pub/linux/kernel/v2.6/

解压:

#tar jxvf linux-2.6.36.tar.bz2

 

2. 修改machine ID

如果machine ID不正确，U-boot的错误提示：

Now, Downloading[ADDRESS:0xc0008000,TOTAL:0x18e7ec]

Please waiting ........................Download Done!!

Download Address: 0xc0008000, DownloadFilesize:0x18e7ec

Checksum is being calculated..

Checksum O.K.

Boot with zImage

 

Starting kernel ...

 

Uncompressing Linux... done, booting thekernel.

 

Error: unrecognized/unsupported machine ID(r1 = 0x00000378).

 

Available machine support:

 

ID (hex)        NAME

00000887        A&W6410

000004f6        SMDK6400

000022b1        SMDK6410

0000078d        NCP

000008ce        Airgoo-HMT

000009e6        SmartQ 5

000009af        SmartQ 7

 

Please check your kernel config and/orbootloader.

由于TQ6410传入的ID是0x00000378，即888。

修改kernel 源代码目录树中的arch/arm/tools/mach-types文件：

注释掉smdk6410行

#smdk6410            MACH_SMDK6410              SMDK6410           1626

增加一行：

smdk6410             MACH_SMDK6410              SMDK6410           888

编译新内核：

# make zImage –j 2

 

3. 复制linux kernel配置文件.config

进入linux kenel 2.6.36源代码目录树，复制s3c6410预定义文件

# cp arch/arm/configs/s3c6400_defconfig .config

配置内核：

#make menuconfig

然后保存退出，编译：

#make all –j 2

应当可以编译完成。

 

4. 配置CPU type

System Type --->

ARM system type --->

(X) Samsung S3C64XX 

 

5. 配置nfs引导rootfs

由于没有移植MTD驱动，所以直接用nfs来引导rootfs

5.1 先配置TCP/IP网络支持

[*] Networking support  --->

Networking options  --->  

<*> Packet socket

[*] TCP/IP networking  

[*]  IP: multicasting

[*]  IP: kernel level autoconfiguration

[*]    IP: DHCP support

[*]    IP: BOOTP support

[*]    IP: RARP support

 

5.2 配置DM9000 NIC driver

Device Drivers  --->

[*] Network device support  --->

[*]  Ethernet (10 or 100Mbit)  --->

 

再修改网卡平台驱动的资源，源代码省略。

5.3 配置nfs client

File systems  --->

[*] Network File Systems  --->

<*>  NFS client support

[*]    NFS client support for NFS version 3

[*]    Root file system on NFS

 

然后保存到.config文件，再make zImage –j 2编译。

 

5.4 配置可抢占功能

Kernel Features  --->

Preemption Model (Preemptible Kernel(Low-Latency Desktop)  ---> 

(X) Preemptible Kernel (Low-LatencyDesktop) 

 

5.5 U-boot命令行配置

#setenv bootargs 'root=/dev/nfs rw nfsroot=10.0.0.160:/home/wenxy/src/s3c6410/rootfs/opt/EmbedSky/root_nfsip=10.0.0.161:10.0.0.1::255.255.255.0 console=ttySAC0,115200 mem=128M'

#saveenv; bootm

即可启动成功。

 

Tips: 如果有kernelpanic消息，内核配置中去掉不必要的模块，以最小的内核配置启却，可以方便定位错误和消除错误。

 

6. 配置rootfs

修改TQ6410自带的rootfs中的inittab文件：

# /etc/inittab

::sysinit:/etc/init.d/rcS

#tq6410_serial0::askfirst:-/bin/sh

::askfirst:-/bin/sh

::once:/usr/sbin/telnetd -l /bin/login

::ctrlaltdel:/sbin/reboot

::shutdown:/bin/umount -a -r

 

把#tq6410_serial0::askfirst:-/bin/sh

改成

::askfirst:-/bin/sh

 

即可启动，并且有哪下日志：

…

VFP support v0.3: implementor 41architecture 1 part 20 variant b rev 5

s3c-rtcs3c64xx-rtc: setting systemclock to 2000-06-12 03:03:19 UTC (960778999)

s3c6400_setup_sdhci_cfg_card:CTRL 2=c0004120, 3=80808080

eth0: link down

dm9000 dm9000.0: eth0: link up, 100Mbps,full-duplex, no LPA

IP-Config: Complete:

    device=eth0, addr=10.0.0.161,mask=255.255.255.0, gw=255.255.255.255,

    host=10.0.0.161, domain=,nis-domain=(none),

    bootserver=10.0.0.1,rootserver=10.0.0.160, rootpath=

Looking up port of RPC100003/2 on 10.0.0.160

Looking up port of RPC100005/1 on 10.0.0.160

VFS: Mounted root (nfs filesystem) ondevice 0:11.

Freeing init memory: 120K

/dev/watchdog: No such file or directory

[12/Jun/2000:03:03:24 +0000]

Please press Enter to activate thisconsole. boa: server version Boa/0.94.13

[12/Jun/2000:03:03:24 +0000] boa: serverbuilt Jul 29 2009 at 14:27:34.

[12/Jun/2000:03:03:24 +0000] boa: startingserver pid=943, port 80

 

[root@EmbedSky /]# uname -a

Linux EmbedSky 2.6.36-svn12#40 PREEMPT Sat Jun 16 17:01:41 CST 2012 armv6l GNU/Linux

 

7. 未解决的问题

(1). 有时候会有Ooopsmessage，Oops错误码为17等等。

(2). 偶尔会有kernelpannic情况。

由于

* error_code :

 *  bit 0== 0 means no page found, 1 means protection fault

 *  bit 1== 0 means read, 1 means write

 *  bit 2== 0 means kernel, 1 means user-mode

 *  bit 3== 0 means data, 1 means instruction

所以解决思路：

尝试重作rootfs：通过busybox做。

或者修改kernel源代码，跟踪调试。