基于TE2410移植2.6.14_西安铁峰电子有限公司的技术博客

大体工作步骤如下：

一．准备必要的文件

首先去官方网站下载最新的 llinux 内核

[url]http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.14.tar.bz2[/url]

因为 linux2.6.14 内核需要更新版本的编译器，所以需要下载交叉编译器

[url]ftp://ftp.handhelds.org/projects/toolchain/arm-linux-gcc-3.4.1.tar.bz2[/url]

二．安装文件

把 gcc 安装在 /usr/local/arm/3.4.1 目录下，安装方法和安装 gcc2.95.3 和 gcc3.3.2 是相同的！

接下来需要解压 linux 内核，输入命令：

[root · localhost hfrk]# tar jxvf linux-2.6.14.tar.bz2

内核被解压到 linux-2.6.14 目录下。

三．修改 makefile 文件

内核的编译是根据 makefile 文件的指示进行的， Makefile 文件来组织内核的各模块之间的关系，记录了各个模块之间的相互联系和依赖关系。

我们首先修改 linux-2.6.14 的根目录下的 makfile 文件，须改的主要内容是目标代码的类型和为编译内核指定一个编译器。注释掉以下内容：

#ARCH ?= $(SUBARCH)

#CROSS_COMPILE ?=

增加如下内容：

ARCH : = arm

CROSS_COMPILE =/usr/local/arm/3.4.1/bin/arm-linux-

四．修改相关的文件。

1. 修改 arch\arm\mach-s3c2410\devs.c 文件

增加头文件定义

/***********add here***********/

#include <linux/mtd/partitions.h>

#include <asm/arch/nand.h>

#include <linux/mtd/nand.h>

/**************end add********/

增加 nand flash 分区信息

/***********add here***********/

static struct mtd_partition partition_info[] ={

{

size: 0x00020000,

offset: 0,

}, {

size: 0x00010000,

offset: 0x00020000,

}, {

size: 0x001c0000,

offset: 0x00030000,

}, {

size: 0x00400000,

offset: 0x00200000,

mask_flags: MTD_WRITEABLE,

}, {

size: 0x03a00000,

offset: 0x00600000,

}

}; /*这部分很重要，千万要跟vivi里的分区信息相同*/

/*加入NAND FLASH 分区*/

struct s3c2410_nand_set nandset ={

nr_partitions: 5 ,

partitions: partition_info ,

};

/*建立芯片支持*/

struct s3c2410_platform_nand superlpplatform={

tacls:0,

twrph0:30,

twrph1:0,

sets: &nandset,

nr_sets: 1,

};

/**************end add********/

struct platform_device s3c_device_nand = {

.name = "s3c2410-nand",

.id = -1,

.num_resources = ARRAY_SIZE(s3c_nand_resource),

.resource = s3c_nand_resource,

/***********add here****************/

.dev = {

.platform_data = &superlpplatform

}

/**************end here************/

};

2. 修改 arch\arm\mach-s3c2410\mach-smdk2410.c 文件

Startic struct platform_device *smdk2410_devices[] __initdata={

&s3c_device_usb,

&s3c_device_lcd;

&s3c_device_wdt,

&s3c_device_i2c;

&s3c_device_iis,

&s3c_device_nand, /*add here*/

};

3.修改drivers/mtd/nand/s3c2410.c禁止flash ECC校验

找到s3c2410_nand_init_chip()函数，在该函数体最后加上：

chip->ecc.mode = NAND_ECC_NONE;

4. 支持启动时挂载devfs
为了我们的内核支持devfs以及在启动时并在/sbin/init运行之前能自动挂载/dev为devfs文件系统。

修改fs/kconfig文件

找到menu "Pseudo filesystems" 添加如下语句：

config DEVFS_FS

bool "/dev file system support (OBSOLETE)"

default y

config DEVFS_MOUNT

bool "Automatically mount at boot"

default y

depends on DEVFS_FS

五．做完以上修改以后，内核编译以后就可以在te2410 开发板上运行了。

打开终端窗口，切换到 linux-2.6.14 目录下，输入命令：

[root · localhost linux-2.6.14]# make smdk2410_defconfig

[root · localhost linux-2.6.14]#make menuconfig

增删的内核配置选项如下：

Loadable module suport--->

Enable loadable module suport

Automatic kernel module loading

System Type--->

S3C2410 DMA suport

Boot options --->Default kernel command string:

noinitrd root=/dev/mtdblock3 init=/linuxrc console＝ttySAC0,115200

mtdblock3 代表第四个flash分区，为root分区

Floating point emulation---->

NWFPE math emulation

#MTD子系统的配置

Device Drivers--->

Memory Technology Devices(MTD)--->

............................................

MTD partitioning support

Command line partition table parsing

............................................

NAND　Flash Device Drivers--->

................................

<*>NAND Device Support

<*>NAND Flash support foe S3C2410/S3C2440 Soc

Character devices--->

.............................

S3C2410 RTC Driver

File systems--->

<>Second extended fs support #去除ext2支持

Pseudo filesystems--->

Virtual memory file system support(former shm fs)

/dev file system support(OBSOLETE)

Automatically mount at boot(NEW)

Miscellaneous filesystems--->

............................

<*>cramfs

.............................

Network File Systems---->

<*>NFS file system support

[root · localhost linux-2.6.14]# make zImage

编译完成以后，会生成镜像文件 arch/arm/boot/zImage ，把这个文件下载到开发板上！

六．修改vivi串口参数

在 2.6 内核中， 2410 的串口由原来的 ttyS0 变为 ttySAC0。启动te2410目标板，进入vivi，在vivi提示符下输入：

vivi>param set linux_cmd_line "noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySAC0，115200"

vivi>param save

七．启动信息

welcome

S3C2410 DEVELOP KIT

VIVI version 0.1.4 ([email]root@localhost.loca[/email]ldomain) (gcc version 2.95.2 20000516 (re

lease) [Rebel.com]) #0.1.4 日 12月 24 13:09:55 CST 2006

MMU table base address = 0x33DFC000

Succeed memory mapping.

NAND device: Manufacture ID: 0xec, Chip ID: 0x76 (Samsung K9D1208V0M)

Found saved vivi parameters.

CS8900 - type: 630e, rev: a00

CS8900 - status: ad6 (EEPROM present)

Setting MAC address...

Display format changed to VGA 640X480 mode

Press Return to start the LINUX now, any other key for

Copy linux kernel from 0x00030000 to 0x30008000, size = 0x001c0000 ... done

zImage magic = 0x016f2818

Setup linux parameters at 0x30000100

linux command line is: "noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySAC0，115200"

MACH_TYPE = 193

NOW, Booting Linux......

Uncompressing Linux...........................................................

....... done, booting the kernel.

Linux version 2.6.14 ([email]root@localhost.loca[/email]ldomain) (gcc version 3.4.1) #10 Mon Aug 27 08:43:35 CST 2007

CPU: ARM920Tid(wb) [41129200] revision 0 (ARMv4T)

Machine: SMDK2410

ATAG_INITRD is deprecated; please update your bootloader.

Memory policy: ECC disabled, Data cache writeback

CPU S3C2410A (id 0x32410002)

S3C2410: core 200.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz

CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on

CPU0: D VIVT write-back cache

CPU0: I cache: 16384 bytes, associativity 64, 32 byte lines, 8 sets

CPU0: D cache: 16384 bytes, associativity 64, 32

Built 1 zonelists

Kernel command line: noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySAC0，115200

irq: clearing subpending status 00000003

irq: clearing subpending status 00000002

PID hash table entries: 512 (order: 9, 8192 bytes)

timer tcon=00000000, tcnt a2c1, tcfg 00000200,00000000, usec 00001eb8

Console: colour dummy device 80x30

Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)

Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)

Memory: 64MB = 64MB total

Memory: 62592KB available (1700K code, 379K data, 88K init)

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

softlockup thread 0 started up.

NET: Registered protocol family 16

S3C2410: Initialising architecture

DMA channel 0 at c4800000, irq 33

DMA channel 1 at c4800040, irq 34

DMA channel 2 at c4800080, irq 35

DMA channel 3 at c48000c0, irq 36

NetWinder Floating Point Emulator V0.97 (double precision)

devfs: 2004-01-31 Richard Gooch

devfs: boot_options: 0x1

Console: switching to colour frame buffer device 80x25

fb0: Virtual frame buffer device, using 1024K of video memory

s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2410

s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2410

s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2410

io scheduler noop registered

io scheduler anticipatory registered

io scheduler deadline registered

io scheduler cfq registered

RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize

s3c2410-nand: mapped registers at c4980000

s3c2410-nand: timing: Tacls 10ns, Twrph0 40ns, Twrph1 10ns

NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit)

NAND_ECC_NONE selected by board driver. This is not recommended !!

Scanning device for bad blocks

Creating 5 MTD partitions on "NAND 64MiB 3,3V 8-bit":

0x00000000-0x00020000 : "vivi"

0x00020000-0x00030000 : "param

0x00030000-0x001f0000 : "kernel"

0x00200000-0x00600000 : "root"

0x00600000-0x04000000 : "usr"

mice: PS/2 mouse device common for all mice

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 4096 (order: 2, 16384 bytes)

TCP bind hash table entries: 4096 (order: 2, 16384 bytes)

TCP: Hash tables configured (established 4096 bind 4096)

TCP reno registered

TCP bic registered

NET: Registered protocol family 1

Reading data from NAND FLASH w

VFS: Mounted root (cramfs filesystem) readonly.

Mounted devfs on /dev

Freeing init memory: 88K

mount /etc as ramfs

re-create the /etc/mtab entries

insmod: QM_MODULES: Function not implemented

Reading data from NAND FLASH without ECC is not recommended

mount: Mounting /dev/mtdblock/4 on /usr failed: No such device

insmod: QM_MODULES: Function not implemented

console=/dev/console

init started: BusyBox v0.60.3 (2002.05.13-08:36+0000) multi-call binary

Starting pid 28, console /dev/console: '/etc/init.d/rcS'

exec: /usr/etc/rc.local: No such file or directory

Waiting for enter to start '/bin/sh' (pid 31, terminal /dev/console)

Please press Enter to activate this console.

Starting pid 31, console /dev/console: '/bin/sh'

BusyBox v0.60.3 (2002.05.13-08:36+0000) Built-in shell (ash)

Enter 'help' for a list of built-in commands.

#

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