Linux-2.6.39 在华恒2410 移植

第一部分

1.解压缩内核清理内核(先安装交叉编译器)

tarzxvf linux-2.6.39.tar.gz -C .

cdlinux-2.6.39

makemrproper ;

viMakefile ,注释SUBARCH,修改ARCH和Complie

2.cparch/arm/configs/s3c2410_defconfig .config

3.makemenuconfig

1.关闭内核Power management options 选项

它可能引起内核 bootingthe kernel 卡死

2.Bootoptions

default kernel command string

initrd=0x30800000,0x400000mem=64M root=/dev/ram rw init=/linuxrc console=ttySAC0,115200(一定不要写错，否则如现象1)

勾选Always use the default kernelcommand string

3.DeviceDrivers-->LED Support 取消所有选项，因为编译时程序有错误。

4.内核添加dm9000 支持

5.KernelFeatures -->开启Use theARM EABI to compile the kernel

兼容root 根文件系统EABI 编译的

6.DeviceDrivers -->Block devices 修改DefaultRAM disk size为8192

4.arch/arm/boot/Makefile添加zImage 拷贝

$(obj)/zImage:$(obj)/compressed/vmlinuxFORCE

$(callif_changed,objcopy)

@echo' Kernel: $@ is ready'

cparch/arm/boot/zImage /tftpboot -f

5.打开arch/arm/mach-s3c2410/smdk2410.c

发现内核配置中没有关于DM9000的配置，于是找了下其他文件，发现mach-mini2440.c里有dm9000的配置代码，于是华丽得Ctrl+C,Ctrl+V。添加修改，参照开发板CS1,INT0

//addby kerson

#include<linux/dm9000.h>

#defineMACH_SMDK2410_DM9K_BASE (S3C2410_CS1+ 0x300)

/*DM9000AEP 10/100 ethernet controller */

staticstruct resource s3c_dm9k_resource[] = {

[0] = {

.start =MACH_SMDK2410_DM9K_BASE,

.end =MACH_SMDK2410_DM9K_BASE + 3,

.flags = IORESOURCE_MEM

},

[1] = {

.start =MACH_SMDK2410_DM9K_BASE + 4,

.end =MACH_SMDK2410_DM9K_BASE + 7,

.flags = IORESOURCE_MEM

},

[2] = {

.start =IRQ_EINT0,

.end = IRQ_EINT0,

.flags = IORESOURCE_IRQ |IORESOURCE_IRQ_HIGHEDGE,

}

};

/*

*The DM9000 has no eeprom, and it's MAC address is set by

*the bootloader before starting the kernel.

*/

staticstruct dm9000_plat_data s3c_dm9k_pdata = {

.flags =(DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),

};

staticstruct platform_device s3c_device_eth = {

.name = "dm9000",

.id = -1,

.num_resources =ARRAY_SIZE(s3c_dm9k_resource),

.resource = s3c_dm9k_resource,

.dev = {

.platform_data =&s3c_dm9k_pdata,

},

};

staticstruct platform_device *s3c_devices[] __initdata = {

&s3c_device_ohci,

//&s3c_device_lcd,

&s3c_device_wdt,

&s3c_device_i2c0,

//&s3c_device_iis,

&s3c_device_eth,

};

6.viarch/arm/plat-s3c24xx/irq.c

在void __inits3c24xx_init_irq(void) 函数末尾添加

//add by kerson__raw_writel(__raw_readl(S3C2410_INTMOD)&(~1),S3C2410_INTMOD);

解决dm9000 网卡ifconfigeth0 up 死机问题，是由于ppcboot将int0初始化为fiq模式，导致request_irq中断申请卡死

7.make 内核制作完成

第二部分 制作root文件系统

1.制作ramdisk.image根文件系统—busy-1.18.5

1.tar-jxvf busybox-1.18.5.tar.bz2 -C .

6. Makefile修改ARCH和CROSS_COMPILE

3.makemenuconfig

1.BusyboxSettings – >

Build Options – >

[*]Buid BusyBox as a static binary (no shared libs)

4make install

在busybox 根文件下有个_install文件夹下有生成的根文件系统

1.sudocp -r /dev _install/ 复制dev文件，裁剪dev文件

mkdir proc

2.制作ext2ramdisk，

ddif=/dev/zero of=ramdisk.image bs=1024 count=8192

mke2fsramdisk.image

sudomount -o loop ramdisk.image /mnt

sudocp -r _install/* /mnt/

sudoumount /mnt

gzipramdisk.image

sudocp ramdisk.image.gz /tftpboot

sudochmod 777 -R /tftpboot

第三部分 ppcboot

1.sudo apt-get install binutils-dev 安装开发库包，否则缺少头文件

使用 opt/host/armv4l/include/bfd.h和ansidecl.h到/usr/include 否则会出现process_section 结构体不存在成员

2.make distclean

make smdk2410_config

make

3.修改 lib_arm/armlinux.c ，bootm 复制内核地址增大

#if10

/*copy kernel and ramdisk from FLASH to SDRAM add by HHTECH*/

ret = memcpy((void *)0x30008000, (void *)0x40000, 0x400000);

If(ret != (void *)0x30008000)

printf("copy kernel failed\n");

else

printf("copy kernel done\n");

#endif

#ifdefRAMDISK

ret = memcpy((void *)0x30800000, (void *)0x440000, 0x800000);

if(ret != (void *)0x30800000)

printf("haha failed\n");

else

printf("copy ramdisk done\n");

#endif

40000| |

| 40 0000 | kernel

440000| |

| 80 0000 | ramdisk

第四部分

1.initrd

2.ramfs使用

使用initramfs的内核配置(使用initramfs做根文件系统):
------------------------------------------------------
Generalsetup --->
[*] Initial RAM filesystem and RAM disk(initramfs/initrd) support
(/rootfs_dir) Initramfs source file(s)//输入根文件系统的所在目录

/home/kerson/ramdisk/

使用initramfs的内核启动参数
不需要"initrd="和"root="参数,但是必须在initramfs中创建/init文件或者修改内核启动最后代码(init文件是软连接，指向什么?init -> bin/busybox，否则内核启动将会失败)

commandline:init=/linuxrc console=ttySAC0,115200

注意 再次编译内核会出现多个目标匹配错误，需要重新替换usr目录编译，还未解决

3.tmpfs一般不做根文件系统

4.nfs

1.Bootoptions-->Default kernel command string

root=/dev/nfsrw nfsroot=192.168.1.56:/armnfs,rsize=1500,wsize=1500ip=192.168.1.199 mem=64M console=ttySAC0(增加rsize和wsize,否则会出现notresponding)

init=/linuxrc

2.Filesystems-- >Network File Systems

NFS Client support(全选)

Root file system on NFS

3.Networkingsupport-- >

Networkingoptions -->IP：kernellevel autoconfiguration

5.norflash jffs2

1.制作jffs2文件系统

sudoapt-get install mtd-utils 安装mtd套件

mkfs.jffs2 -d /armnfs -o jffs2.img

将jffs2.img 通过ppcboot烧写到正确扇区

文件系统中记得添加

#mkdir mtdblock
# cd mtdblock
# mknod -m 666 0 b 31 0
#mknod -m 666 1 b 31 1
# mknod -m 666 2 b 31 2
# mknod -m666 3 b 31 3

2.添加内核选项

随便在maps中找一个都可以拿来改改用的,不过方便一点还是提供一份源码好了
这个驱动是for Intel E28F128J3A-150 on s2c2410的,不同的芯片就需修改一些参数了

当然需要在drivers/mtd/maps/Kconfig中添加选项

#addby kerson

configMTD_S3C2410

tristate"CFI Flash device mapped on ARM S3C2410 "

dependson MTD_CFI && ARCH_SMDK2410 && MTD_PARTITIONS

help

This provides a driver for the NOR flash attached to a S3C2410 chip.

再makefile中添加

#addby kerson

obj-$(CONFIG_MTD_S3C2410)+=s3c2410.o

在maps中添加文件s3c2410.c

/*maps driver for Intel E28F128J3A-150 on s2c2410 */

#include<linux/module.h>

#include<linux/types.h>

#include<linux/kernel.h>

#include<linux/init.h>

#include<asm/io.h>

#include<linux/mtd/mtd.h>

#include<linux/mtd/map.h>

#include<linux/mtd/partitions.h>

#defineFLASH_PHYS_ADDR 0x00000000

#defineFLASH_SIZE 0x01000000

#defineFLASH_PARTITION0_ADDR 0x00000000

#defineFLASH_PARTITION0_SIZE 0x00040000

#defineFLASH_PARTITION1_ADDR 0x00040000

#defineFLASH_PARTITION1_SIZE 0x00400000

#defineFLASH_PARTITION2_ADDR 0x00440000

#defineFLASH_PARTITION2_SIZE 0x00800000

#defineFLASH_PARTITION3_ADDR 0x00c40000

#defineFLASH_PARTITION3_SIZE 0x003c0000

structmap_info s3c2410_map = {

.name= "s3c2410 NOR flash Intel E28F128J3A",

.size= FLASH_SIZE,

.bankwidth= 2,

.phys= FLASH_PHYS_ADDR,

};

structmtd_partition s3c2410_parts[] = {

{

.name= "Bootloader",

.offset= FLASH_PARTITION0_ADDR,

.size= FLASH_PARTITION0_SIZE,

.mask_flags= MTD_WRITEABLE //禁止写

},

{

.name= "Kernel",

.offset= FLASH_PARTITION1_ADDR,

.size= FLASH_PARTITION1_SIZE,

.mask_flags= MTD_WRITEABLE

},

{

.name= "Jffs2",

.offset= FLASH_PARTITION2_ADDR,

.size= FLASH_PARTITION2_SIZE,

},

/*{

.name= "Jffs2",

.offset= FLASH_PARTITION3_ADDR,

.size= FLASH_PARTITION3_SIZE

}*/

};

#definePARTITION_COUNT (sizeof(s3c2410_parts)/sizeof(struct mtd_partition))

staticstruct mtd_info *mymtd;

int__init init_s3c2410(void)

{

printk(KERN_NOTICE"s3c2410 flash device: %x at %x\n",FLASH_SIZE,FLASH_PHYS_ADDR);

s3c2410_map.phys= FLASH_PHYS_ADDR;

s3c2410_map.virt= ioremap(FLASH_PHYS_ADDR,FLASH_SIZE);

if(!s3c2410_map.virt) {

printk("Failedto ioremap\n");

return-EIO;

}

simple_map_init(&s3c2410_map);

mymtd= do_map_probe("cfi_probe", &s3c2410_map);

if(mymtd) {

mymtd->owner= THIS_MODULE;

mymtd->erasesize=0x20000;

add_mtd_partitions(mymtd,s3c2410_parts, PARTITION_COUNT);

printk(KERN_NOTICE"s3c2410 flash device initialized\n");

return0;

}

iounmap((void*)s3c2410_map.virt);

return-ENXIO;

}

staticvoid __exit cleanup_s3c2410(void)

{

if(mymtd) {

del_mtd_partitions(mymtd);

map_destroy(mymtd);

}

if(s3c2410_map.virt) {

iounmap((void*)s3c2410_map.virt);

s3c2410_map.virt= 0;

}

}

module_init(init_s3c2410);

module_exit(cleanup_s3c2410);

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Dansen");

MODULE_DESCRIPTION("MTDmap driver for S3C2410");

完成文件的添加

3.makemenuconfig

DeviceDrivers-- >

MemoryTechnology Devices(MTD)-->
       <*>Memory Technology Device (MTD) support
       [*]MTD partitioning support
       <*>Caching block device access to MTD devices
       RAM/ROM/Flash chip drivers-->
           <*>Detect flash chips by Common Flash Interface (CFI)probe
           <*>Support for Inter/Sharp flash chips
       Mapping drivers for chip access-->
           <*>CFI flash device mapped on S3C2410
   Miscellaneous filesystems-->
       <*>Journalling Flash File System v2 (JFFS2) support

当然内核配置需要添加
Filesystems --->
     <*> Kernelautomounter support

记得配置内核ARMEABI compile the kernel

添加内核 commandline:

root=/dev/mtdblock2rw rootfstype=jffs2init=/linuxrc mem=64M console=ttySAC0,115200