构建嵌入式根文件系统(busybox1.2.2)续1

三、测试
1、在本机修改/etc/export文件，重启NFS服务：

[root@vm-dev root]# vi /etc/exports

/opt/lyj             192.168.1.*(rw,insecure,sync,no_root_squash)

/opt/develop/lyj/common/porting/rootfs/root_stand/reset/rootfs             192.168.1.*(rw,insecure,sync,no_root_squash)

[root@vm-dev root]# service nfs restart

 

2、在Bootloader中传递以下参数给Kernel：

root=/dev/nfs rw nfsroot=192.168.1.152:/opt/develop/lyj/common/porting/rootfs/root_stand/reset/rootfs ip=192.168.1.155:192.168.1.152:192.168.1.254:255.255.255.0:Jacky:eth0:off console=ttySAC0,115200 init=/linuxrc noinitrd

 

3、启动目标板，串口输出显示根文件系统已经加载成功：

U-Boot 1.3.2 (Nov 27 2016 - 17:43:03)

 

DRAM:  64 MB

Flash: 512 kB

NAND:  64 MiB

In:    serial

Out:   serial

Err:   serial

Found DM9000 ID:90000a46 at address 10000000 !

DM9000 work in 16 bus width

bd->bi_entaddr: 08:00:3e:26:0a:5b

[eth_init]MAC:8:0:3e:26:a:5b:

Hit any key to stop autoboot:  0

 

NAND read: device 0 offset 0x80000, size 0x1b0000

 1769472 bytes read: OK

## Booting image at 30008000 ...

   Image Name:   Linux-2.6.24.4

   Created:      2016-11-27   7:24:11 UTC

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    1697964 Bytes =  1.6 MB

   Load Address: 30008000

   Entry Point:  30008040

   Verifying Checksum ... OK

test:hdr->ih_type:2

test:hdr->ih_comp:0

   XIP Kernel Image ... OK

test:hdr->ih_type:2

test:hdr->ih_os:5

 

Starting kernel ...

 

test:machid:805306624

test: bi_boot_params:0x33f5bfb8

test:starting 1

Uncompressing Linux............................................................................................................ done, booting the kernel.

Linux version 2.6.24.4 (root@vm-dev) (gcc version 3.4.6) #94 Thu Nov 27 10:02:26 CST 2008

CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=00007177

Machine: SMDK2410

Memory policy: ECC disabled, Data cache writeback

CPU S3C2410A (id 0x32410002)

S3C2410: core 202.800 MHz, memory 101.400 MHz, peripheral 50.700 MHz

S3C24XX Clocks, (c) 2004 Simtec Electronics

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 byte lines, 8 sets

Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256

Kernel command line: root=/dev/nfs rw nfsroot=192.168.1.152:/opt/develop/lyj/common/porting/rootfs/root_stand/reset/rootfs ip=192.168.1.155:192.168.1.152:192.168.1.254:255.255.255.0:Jacky:eth0:off console=ttySAC0,115200 init=/linuxrc noinitrd

irq: clearing subpending status 00000002

PID hash table entries: 256 (order: 8, 1024 bytes)

timer tcon=00500000, tcnt a509, tcfg 00000200,00000000, usec 00001e4c

Console: colour dummy device 80x30

console [ttySAC0] enabled

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

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 61324KB available (3088K code, 316K data, 132K init)

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

net_namespace: 64 bytes

NET: Registered protocol family 16

S3C2410 Power Management, (c) 2004 Simtec Electronics

S3C2410: Initialising architecture

S3C24XX DMA Driver, (c) 2003-2004,2006 Simtec Electronics

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

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

NET: Registered protocol family 2

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

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

NetWinder Floating Point Emulator V0.97 (double precision)

yaffs Nov 27 2008 09:58:27 Installing.

io scheduler noop registered

io scheduler anticipatory registered (default)

io scheduler deadline registered

io scheduler cfq registered

Console: switching to colour frame buffer device 80x30

fb0: s3c2410fb frame buffer device

lp: driver loaded but no devices found

ppdev: user-space parallel port driver

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled

s3c2410-uart.0: s3c2410_serial0 at MMIO 0x50000000 (irq = 70) is a S3C2410

s3c2410-uart.1: s3c2410_serial1 at MMIO 0x50004000 (irq = 73) is a S3C2410

s3c2410-uart.2: s3c2410_serial2 at MMIO 0x50008000 (irq = 76) is a S3C2410

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

loop: module loaded

DM9000: dm9k_init_module

Board init for dm9000a finished!

I/O: c480e000, VID: 90000a46

eth0: at 0xc480e000 IRQ 18

eth0: Ethernet addr: 08:00:3e:26:0a:5b

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2

ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx

Driver 'sd' needs updating - please use bus_type methods

S3C24XX NAND Driver, (c) 2004 Simtec Electronics

s3c2410-nand s3c2410-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29ns

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

0x00000000-0x00080000 : "Boot Agent"

0x00080000-0x00280000 : "S3C2410 kernel"

0x00280000-0x00680000 : "S3C2410 rootfs"

0x00680000-0x04000000 : "user"

usbmon: debugfs is not available

116x: driver isp116x-hcd, 03 Nov 2005

s3c2410-ohci s3c2410-ohci: S3C24XX OHCI

s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000

usb usb1: configuration #1 chosen from 1 choice

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

Initializing USB Mass Storage driver...

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

mice: PS/2 mouse device common for all mice

s3c2410 TouchScreen successfully loaded

input: s3c2410 TouchScreen as /class/input/input0

S3C24XX RTC, (c) 2004,2006 Simtec Electronics

s3c2410-rtc s3c2410-rtc: rtc disabled, re-enabling

s3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0

i2c /dev entries driver

s3c2410-i2c s3c2410-i2c: slave address 0x10

s3c2410-i2c s3c2410-i2c: bus frequency set to 99 KHz

s3c2410-i2c s3c2410-i2c: i2c-0: S3C I2C adapter

S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics

s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled

TCP cubic registered

NET: Registered protocol family 1

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

s3c2410-rtc s3c2410-rtc: hctosys: invalid date/time

IP-Config: Complete:

      device=eth0, addr=192.168.1.155, mask=255.255.255.0, gw=192.168.1.254,

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

     bootserver=192.168.1.152, rootserver=192.168.1.152, rootpath=

Looking up port of RPC 100003/2 on 192.168.1.152

Looking up port of RPC 100005/1 on 192.168.1.152

VFS: Mounted root (nfs filesystem).

Freeing init memory: 132K

init started: BusyBox v1.12.2 (2016-11-27 14:55:55 CST)

starting pid 785, tty '': '/etc/init.d/rcS'

Processing etc/init.d/rc.S

 Mount all

 Start mdev....

****************************************************

 rootfs by NFS, s3c2410

 Created by lyj_uptech @ 2008.11.28

 Good Luck

 

****************************************************

 

 

Please press Enter to activate this console.

starting pid 790, tty '': '-/bin/sh'

 

Processing /etc/profile... Done

 

Processing /etc/profile

 Set search library path

 Set user path

 Set PS1

All done!

 

[root@up-tech /]# ls

bin      dev      home     linuxrc  proc     sbin     tmp      var

boot     etc      lib      mnt      root     sys      usr

[root@up-tech /]#

 

已经直接进入了nfs文件系统！

 MSN: 

注1：busybox的最新版本中添加了许多新的功能，诸如sendmail之类，本人还要经过测试！
这篇文章只是构建最简单的根文件系统，并没有什么特殊的功能，如果要制作一个完整的根文件系统，可以参考LSS工程。另外我也在着手制作一个相对完善的根文件系统，见后续的文章。