OK6410开发板Linux内核移植
OK6410开发板Linux内核移植
一、环境介绍：
1、环境配置
Ø 开发板：ok6410-A
Ø 宿主机：XP-sp3下用Vmware搭建的CentOS6.0系统
注：1）、外网网卡用的NAT方式连接，用来在window客户端用putty连接虚拟机和更新工具连上网用；
2）、第二块儿网卡用的桥接方式，用来连接开发板；
3）、串口用来在虚拟机里使用minicom连接开发板。
Ø 交叉工具：arm-linux-4.4.1.tar.gz
2、环境搭建结果
Minicom连接开发板：
Putty连接好虚拟机：
结束后内核能正常启动并挂载NFS系统：
二、移植过程
1、源代码准备
接下来开始。。哈哈 ，此过程痛并快乐着。。。准备好了么？gogogo。。。。
更新最新源代码，并创建新实验分支：
[root@localhost linux-2.6]# git fetch
remote: Counting objects: 270, done.
remote: Compressing objects: 100% (117/117), done.
remote: Total 120 (delta 87), reused 0 (delta 0)
Receiving objects: 100% (120/120), 26.10 KiB, done.
Resolving deltas: 100% (87/87), completed with 54 local objects.
From git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
371de6e..89307ba master -> origin/master
[root@localhost linux-2.6]# git status
# On branch zkf
nothing to commit (working directory clean)
[root@localhost linux-2.6]# git checkout -b test
Switched to a new branch 'test'
[root@localhost linux-2.6]# ls
arch Documentation init lib README sound
block drivers ipc MAINTAINERS REPORTING-BUGS tools
COPYING firmware Kbuild Makefile samples usr
CREDITS fs Kconfig mm scripts virt
crypto include kernel net security
[root@localhost linux-2.6]#
新添加一个说明文件，说明一下修改源代码遵循GPL版权
[root@localhost linux-2.6]# vi ok6410_readme.txt
[root@localhost linux-2.6]# git add ok6410_readme.txt
[root@localhost linux-2.6]# git commit –a
[test 97a3a32] add note
1 files changed, 3 insertions(+), 0 deletions(-)
create mode 100644 ok6410_readme.txt
[root@localhost linux-2.6]#
2、移植过程
（1）、修改顶层makefile文件
注释掉默认的并新添加：
export KBUILD_BUILDHOST := $(SUBARCH)
#ARCH ?= $(SUBARCH)
ARCH ?= arm
#CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
CROSS_COMPILE ?= arm-linux
# Architecture as present in compile.h
（2）、新增并修改板级文件
（复制现有最相近的板子的）
[root@localhost mach-s3c64xx]# ls
clock.c Kconfig mach-smartq.c setup-i2c0.c
cpu.c mach-anw6410.c mach-smartq.h setup-i2c1.c
dev-audio.c mach-crag6410.c mach-smdk6400.c setup-ide.c
dev-spi.c mach-crag6410-module.c mach-smdk6410.c setup-keypad.c
dev-uart.c mach-hmt.c Makefile setup-sdhci.c
dma.c mach-mini6410.c Makefile.boot setup-sdhci-gpio.c
include mach-ncp.c pm.c sleep.S
irq.c mach-real6410.c s3c6400.c
irq-eint.c mach-smartq5.c s3c6410.c
irq-pm.c mach-smartq7.c setup-fb-24bpp.c
[root@localhost mach-s3c64xx]# pwd
/home/linux-2.6/arch/arm/mach-s3c64xx
其中的mach-mini6410.c 板子的配置与ok6410比较相似
[root@localhost mach-s3c64xx]# cp mach-mini6410.c mach-ok6410.c
修改mach-ok6410.c
/* linux/arch/arm/mach-s3c64xx/mach-ok6410.c
将文件中所有mini6410替换为ok6410
:%s/mini6410/ok6410/g
注意需要将大写的MINI6410也要替换掉（其中大部分都是输出信息，有一处与机器码有关的要更改）
MACHINE_START(MINI6410, "MINI6410")
/* Maintainer: Darius Augulis <augulis.darius@gmail.com> */
.atag_offset = 0x100,
.init_irq = s3c6410_init_irq,
.map_io = ok6410_map_io,
.init_machine = ok6410_machine_init,
.timer = &s3c24xx_timer,
此文件中包含NAND的分区信息可以根据自己的需求修改：
/*modify by zkf
//static struct mtd_partition ok6410_nand_part[] = {
// [0] = {
// .name = "uboot",
// .size = SZ_1M,
// .offset = 0,
// },
// [1] = {
// .name = "kernel",
// .size = SZ_2M,
// .offset = SZ_1M,
// },
// [2] = {
// .name = "rootfs",
// .size = MTDPART_SIZ_FULL,
// .offset = SZ_1M + SZ_2M,
// },
//};
*/
struct mtd_partition ok6410_nand_part[] = {
{
.name = "Bootloader",
.offset = 0,
.size = (1 * SZ_1M),
.mask_flags = MTD_CAP_NANDFLASH,
},
{
.name = "Kernel",
.offset = (1 * SZ_1M),
.size = (5*SZ_1M) ,
.mask_flags = MTD_CAP_NANDFLASH,
},
{
.name = "User",
.offset = (6 * SZ_1M),
.size = (120*SZ_1M) ,
},
{
.name = "File System",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
}
};
/*modify by zkf end*/
修改此目录下的Makefile 文件，使之在编译的时候编译我们刚才新建的“mach-ok6410”文件：
# Machine support
obj-$(CONFIG_MACH_ANW6410) += mach-anw6410.o
obj-$(CONFIG_MACH_SMDK6400) += mach-smdk6400.o
obj-$(CONFIG_MACH_SMDK6410) += mach-smdk6410.o
obj-$(CONFIG_MACH_REAL6410) += mach-real6410.o
obj-$(CONFIG_MACH_OK6410) += mach-ok6410.o
obj-$(CONFIG_MACH_MINI6410) += mach-mini6410.o
obj-$(CONFIG_MACH_NCP) += mach-ncp.o
obj-$(CONFIG_MACH_HMT) += mach-hmt.o
obj-$(CONFIG_MACH_SMARTQ) += mach-smartq.o
obj-$(CONFIG_MACH_SMARTQ5) += mach-smartq5.o
obj-$(CONFIG_MACH_SMARTQ7) += mach-smartq7.o
obj-$(CONFIG_MACH_WLF_CRAGG_6410) += mach-crag6410.o mach-crag6410-module.o
修改此目录下的Kconfig文件：（比照其他开发板增加）
config MACH_OK6410
bool "OK6410"
select CPU_S3C6410
select S3C_DEV_HSMMC
select S3C_DEV_HSMMC1
select S3C64XX_SETUP_SDHCI
select S3C_DEV_USB_HOST
select S3C_DEV_NAND
select S3C_DEV_FB
select S3C64XX_SETUP_FB_24BPP
select SAMSUNG_DEV_ADC
select SAMSUNG_DEV_TS
help
Machine support for the FriendlyARM MINI6410
（3）、机器码修改
修改/home/linux-2.6/arch/arm/tools目录下mach-types文件，增加新添加开发板的机器码
# machine_is_xxx CONFIG_xxxx MACH_TYPE_xxx number
smdk4212 MACH_SMDK4212 SMDK4212 3638
smdk4412 MACH_SMDK4412 SMDK4412 3765
ok6410 MACH_OK6410 OK6410 1216
（4）、配置内核
接下来配置内核：（如果有现成的配置文件更好啦，哈哈）
[root@localhost linux-2.6]# make menuconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
*** Unable to find the ncurses libraries or the
*** required header files.
*** 'make menuconfig' requires the ncurses libraries.
***
*** Install ncurses (ncurses-devel) and try again.
***
make[1]: *** [scripts/kconfig/dochecklxdialog] 错误 1
make: *** [menuconfig] 错误 2
提示错误没有安装ncurses
[root@localhost linux-2.6]# yum –y install ncurses ncurses-devel 安装后进入配置界面：
有耐心可以每项都看看。。。。这里附上一个配置好的文件（cp ok6410_config .config 即可）
此时文件的修改已经结束了， 。
（5）修改文件概览
看一下修改的文件有哪些：
[root@localhost linux-2.6]# git status
# On branch test
# Changed but not updated:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: Makefile
# modified: arch/arm/mach-s3c64xx/Makefile
# modified: arch/arm/tools/mach-types
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# arch/arm/mach-s3c64xx/mach-ok6410.c
# ok6410_config
no changes added to commit (use "git add" and/or "git commit -a")
[root@localhost linux-2.6]# git add arch/arm/mach-s3c64xx/mach-ok6410.c
[root@localhost linux-2.6]# git add ok6410_config
Commit一下做一下记录：
commit c07db86a1c7f6658958678eccb418f08bf665c6b
Author: zkaifa@VM <zkaifa@163.com>
Date: Fri Dec 30 16:22:59 2011 +0800
config is done
lala...Prepare to "make"
commit a26c6397a3446766ed6744012b4e570e185a698e
（6）、编译内核
make zImage
三、烧写内核
由于linux下DNW不太好用所以暂时把串口切换到windows下，使用DNW工具下载调试（大家谁有好的办法记得通知我哦， ）
1、将编译好的zImage拷贝到windows下
2、用DNW下载内核
选择好内核下载到板子内存中
下载完成
3、擦除NAND内核分区
4、写入NAND
Reset一下，重启板子。
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