Linux-2.6.x在S3C44B0X上的移植总结

需要准备的软件包:

系统包：uClinux-dist-20040408.tar.gz

下载地址：http://www.uclinux.org/pub/uClinux/dist/uClinux-dist-20040408.tar.gz

内核包：linux-2.6.9.tar.bz2

下载地址：http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.9.tar.bz2

补丁包1：linux-2.6.9-uc0.patch.gz

下载地址：http://www.uclinux.org/pub/uClinux/uClinux-2.6.x/linux-2.6.9-uc0.patch.gz

补丁包2：linux-2.6.9-uc0-hsc0.patch.gz

下载地址：http://opensrc.sec.samsung.com/download/linux-2.6.9-uc0-hsc0.patch.gz

1 解压uClinux-dist-20040408.tar.gz

[root@localhost opt]# tar -zxvf uClinux-dist-20040408.tar.gz

解压后在当前目录下生成uClinux-dist目录。

2 采用2.6.9内核

[root@localhost opt]#cp linux-2.6.9.tar.bz2 uClinux-dist/

[root@localhost opt]#cp linux-2.6.9-uc0.patch.gz uClinux-dist/

[root@localhost opt]#cp linux-2.6.9-uc0-hsc0.patch.gz uClinux-dist/

 

uClinux-dist-20040408包中的2.6.x内核是2.6.2的，我用2.6.9替换掉。

Linux-2.6.9.tar.bz2是内核包，linux-2.6.9-uc0.patch.gz是对针对no mmu的内核补丁，linux-2.6.9-uc0-hsc0.patch.gz是针对CPU的内核补丁。

 

[root@localhost uClinux-dist]#tar –jxvf linux-2.6.9.tar.bz2

解压后生成linux-2.6.9目录。

[root@localhost uClinux-dist]#mv linux-2.6.9-uc0.patch.gz linux-2.6.9/

[root@localhost uClinux-dist]#mv linux-2.6.9-uc0-hsc0.patch.gz linux-2.6.9/

[root@localhost uClinux-dist]#cd linux-2.6.9

[root@localhost linux-2.6.9]#gzip –dc linux-2.6.9-uc0.patch.gz | patch –p1

[root@localhost linux-2.6.9]#gzip –dc linux-2.6.9-uc0-hsc0.patch.gz | patch –p1

[root@localhost linux-2.6.9]#cd ..

[root@localhost uClinux-dist]#rm –rf linux-2.6.x

[root@localhost uClinux-dist]#mv linux2.6.9 linux-2.6.x

3创建uClinux-dist/vendors/Samsung/44B0

[root@localhost uClinux-dist]#cd vendors/Samsung/

[root@localhost Samsung]#mkdir 44B0

[root@localhost Samsung]#cp 4510B/* 44B0/

[root@localhost Samsung]#cd ../../../

[root@localhost Samsung]#cp linux-2.6.x/arch/armnommu/config/s3c44b0x_defconfig

vendors/Samsung/44B0/config.linux-2.6.x

4 修改配置信息

[root@localhost uClinux-dist]#cd vendors/Samsung/44B0

⑴修改config.linux-2.6.x

#

# System Type

#

DRAM_BASE=0x0C000000

DRAM_SIZE=0x00800000

FLASH_MEM_BASE=0x01000000

FLASH_SIZE=0x00200000

CONFIG_ARM_CLK=64000000              //64M时钟

 

#

# S3C44B0X Board Driver Options

#

CONFIG_SERIAL_S3C44B0X=y

CONFIG_SERIAL_S3C44B0X_CONSOLE=y

CONFIG_ETH_RTL8019AS=n

先屏蔽网卡驱动

 

⑵修改config.vendor-2.6.x

[root@localhost 44B0]#cp config.vendor-2.4.x config.vendor-2.6.x

修改部分

CONFIG_USER_BUSYBOX_KILLALL=n

CONFIG_USER_LOGIN_LOGIN=n

CONFIG_USER_OLD_PASSWORDS=n

CONFIG_USER_BUSYBOX_BUSYBOX=n

⑶修改config.arch

CONSOLE_BAUD_RATE = 57600

通信波特率改为与U-BOOT同样

⑷修改Makefile和 rc

uClinux-dist//vendors/Samsung/44B0/Makefile 修改后如下：

/---------------------------------------------------------------------------------------------------------------------------

ROMFSIMG = $(IMAGEDIR)/romfs.img

ROMIMAGE = $(IMAGEDIR)/image.rom

RAMIMAGE = $(IMAGEDIR)/image.ram

 

...

 

echo "$(VERSIONSTR) -- " `date` > $(ROMFSDIR)/etc/version

 cp $(ROOTDIR)/user/ramimage/ramfs2048.img /

  $(ROOTDIR)/romfs/etc/ramfs2048.img

 

image:

  [ -d $(IMAGEDIR) ] || mkdir -p $(IMAGEDIR)

  genromfs -v -V "ROMdisk" -f $(ROMFSIMG) -d $(ROMFSDIR)

 $(CROSS_COMPILE)ld -r -o $(ROOTDIR)/$(LINUXDIR)/romfs.o /

  -b binary $(ROMFSIMG)

  $(CROSS_COMPILE)objcopy -O binary -R .note -R .comment /

  -S $(ROOTDIR)/$(LINUXDIR)/linux $(RAMIMAGE)

  cp $(ROOTDIR)/$(LINUXDIR)/arch/armnommu/boot/zImage /

  $(ROMIMAGE)

 

# $(CROSS_COMPILE)objcopy -O binary --remove-section=.romvec /

  --remove-section=.text --remove-section=.ramvec /

  --remove-section=.init /

  --remove-section=.bss --remove-section=.eram /

  $(ROOTDIR)/$(LINUXDIR)/linux $(IMAGEDIR)/linux.data

# $(CROSS_COMPILE)objcopy -O binary --remove-section=.ramvec /

  --remove-section=.bss --remove-section=.data /

  --remove-section=.eram /

  --set-section-flags=.romvec=CONTENTS,ALLOC,LOAD,READONLY,CODE /

  $(ROOTDIR)/$(LINUXDIR)/linux $(IMAGEDIR)/linux.text

# cat $(IMAGEDIR)/linux.text $(IMAGEDIR)/linux.data $(ROMFSIMG) > $(IMAGE)

---------------------------------------------------------------------------------------------------------------------------/

uClinux-dist//vendors/Samsung/44B0/rc修改如下

/---------------------------------------------------------------------------------------------------------------------------

hostname Samsung

/bin/expand /etc/ramfs.img /dev/ram0

/bin/expand /etc/ramfs2048.img /dev/ram1

mount -t proc proc /proc

mount -t ext2 /dev/ram0 /var

mount -t ext2 /dev/ram1 /var

chmod 777 /ramdisk

mkdir /var/config

mkdir /var/tmp

mkdir /var/log

mkdir /var/run

mkdir /var/lock

mkdir /var/empty

ifconfig lo 127.0.0.1

route add -net 127.0.0.0 netmask 255.255.255.0 lo

ifconfig eth0 192.168.1.70 netmask 255.255.255.0 up

cat /etc/motd

---------------------------------------------------------------------------------------------------------------------------/

5 增加romfs

⑴修改linux-2.6.x/arch/armnommu/kernel/vmlinux.lds.S

*(.got)                  /* Global offset table             */

                     romfs_start = .;

                     romfs.o

                     romfs_end = .;

 

              _etext = .;              /* End of text section            */

⑵修改linux-2.6.x/arch/armnommu/kernel/setup.c

64 extern int _stext, _text, _etext, _edata, _end;

65 extern int romfs_start,romfs_end;

…

void __init setup_arch(char **cmdline_p)

{

…

683 char *from = default_command_line;

      

685 sprintf(default_command_line,"root=/dev/ram0 initrd=0x%08lx,%ldk keepinitrd",(unsigned long)&romfs_start,((unsigned long)&romfs_end-(unsigned long)&romfs_start)>>10);

…

⑶修改uClinux-dist/Makefile

在TFTPDIR = /tftpboot 后添加

LINUXTARGET = bzImage

6 修改库文件

⑴修改uClibc/libc/sysdeps/linux/common/create_module.c

//#define __NR_create_module    127

改为

#define __NR_create_module    127

⑵修改uClibc/libc/sysdeps/linux/common/syscalls.c

//#define __NR_get_kernel_syms 130

改为

#define __NR_get_kernel_syms 130

⑶修改uClibc/include/bits/sigcontextinfo.h

注释掉

//#include<linux/version.h>

/******************************************************************************

以上库文件不修改会出现的错误

create_module.c: In function `__create_module':

create_module.c:37: `__NR_create_module' undeclared (first use in this function)

create_module.c:37: (Each undeclared identifier is reported only once

create_module.c:37: for each function it appears in.)

make[6]: *** [create_module.o] Error 1

make[4]: Leaving directory `/opt/uClinux-dist/uClibc/libc/sysdeps/linux/common/'

 

syscalls.c: In function `get_kernel_syms':

syscalls.c:1446: `__NR_get_kernel_syms' undeclared (first use in this function)

syscalls.c:1446: (Each undeclared identifier is reported only once

syscalls.c:1446: for each function it appears in.)

make[4]: Leaving directory `/opt/uClinux-dist/uClibc/libc/sysdeps/linux/common/'

 

In file included from signals.c:24:

/opt/uClinux-dist/lib/uClibc/include/bits/sigcontextinfo.h:21: linux/version.h: No such file or directory

make[4]: *** [signals.o] Error 1

make[4]: Leaving directory `/opt/uClinux-dist/uClibc/libpthread/linuxthreads'

******************************************************************************/

7 编译内核

⑴[root@localhost opt]#make distclean

⑵[root@localhost opt]#make menuconfig

①选择CPU

Vendor:Samsung

Product:44B0

②选择内核

Kernel Version:linux-2.4.x

Libc Version:uClibc

Customize kernel setting:y

Customize vendor/user setting:y

③保存设置

④退出

退出后进行参数设置，参数的设置选择会自动按照vendors/Samsung/44B0 里的配置文件来选择。再配置过程会出现如下需要手动选择的：

*

* System Type

*

ARM system type

  1. Atmel AT91xxx (ARCH_ATMEL)

  2. Samsung S3C3410X (ARCH_S3C3410)

  3. ESPD 4510B / Samsung S3C4510B (ARCH_ESPD_4510B)

> 4. Samsung S3C44B0 (ARCH_S3C44B0)

  5. Samsung S5C7375 (ARCH_S5C7375)

  6. Samsung S3C24A0 (ARCH_S3C24A0) (NEW)

choice[1-6]: 4

 

boa (CONFIG_USER_BOA_SRC_BOA) [N/y/?] (NEW) n

配置完毕后会弹出 kernel setting 和 vendor/user setting的设置窗口，直接按exit保存即可。

⑶ make dep

       ⑷ make lib_only

       ⑸ make user_only

       ⑹ make romfs

       ⑻ make image

       ⑼ make linux

       ⑽ make image

       ⑿ make

编译通过后会在uClinux-dist/images 里产生三个文件：

image.ram   image.rom      romfs.img

image.ram 即是可以移植的。

 

移植后出现:

Error:unable to open an initial console

未解决