āļāļēāļĢāļŠāļĢāđāļēāļāļĢāļ°āļāļāļāļģāļĨāļāļāļŠāļģāļŦāļĢāļąāļāļŠāļāļēāļāļąāļāļĒāļāļĢāļĢāļĄ ARM āļāđāļ§āļĒāļāļļāļāđāļāļĢāļ·āđāļāļāļĄāļ·āļ Buildroot āļāļāđāļāļĢāđāļāļĢāļĄ QEMU
āļāļģāļāļēāļĢāļāļīāļāļāļąāđāļāđāļāļĢāđāļāļĢāļĄāđāļĨāļ°āđāļĨāļāļĢāļēāļĢāļĩāļāļĩāđāđāļāļĩāđāļĒāļ§āļāđāļāļ
$ sudo apt install autoconf automake libtool libexpat1-dev libncurses5-dev bison flex patch curl cvs texinfo build-essential subversion gawk python-dev gperf ncurses-dev g++ gcc texi2html nfs-kernel-server
āļŠāļĢāđāļēāļāđāļāđāļĢāļāļāļāļĢāļĩāļŠāļģāļŦāļĢāļąāļāđāļāđāļ root filesystem āļāļāļāļĢāļ°āļāļāļāļāļīāļāļąāļāļīāļāļēāļĢ Embedded Linux āļāđāļ§āļĒāđāļāļĢāđāļāļāļāļĨāļāļĢāļ°āļĒāļļāļāļāđ NFS (Network File System) āļāđāļēāļāļĢāļ°āļāļāđāļāļĢāļ·āļāļāđāļēāļĒ LAN
āđāļĨāđāļ§āļāļģāļāļēāļĢāļāļąāđāļāļāđāļēāđāļāđāļĢāļāļāļāļĢāļĩāļāļĩāđāļāđāļāļāļāļēāļĢāđāļāļĢāđāļāđāļēāļ NFS āļ āļēāļĒāđāļāđāļāļĨāđ /etc/exports āļāđāļ§āļĒāļāļģāļŠāļąāđāļāļāđāļēāļāļĨāđāļēāļāļāļĩāđ
$ sudo nano /etc/exports
/home/student/nfsroot *(rw,sync,no_root_squash,no_subtree_check)
āđāļĢāļīāđāļĄāđāļĢāļĩāļĒāļāļāļĢāļīāļāļēāļĢ NFS Server āđāļŦāļĄāđāļāļĩāļāļāļĢāļąāđāļ
$ sudo /etc/init.d/nfs-kernel-server restart
āļāļīāļāļāļąāđāļāđāļāļĢāļ·āđāļāļāļĄāļ·āļ buildroot āļāļķāđāļāđāļāđāļ cross-compiling toolchain
$ wget http://buildroot.uclibc.org/downloads/buildroot-2013.05.tar.gz
$ tar -xzvf buildroot-2013.05.tar.gz
$ cd buildroot-2013.05/
āļāļąāđāļāļāđāļēāļĢāļ°āļāļāļāļāļīāļāļąāļāļīāļāļēāļĢāļĨāļĩāļāļļāļāļāđāđāļāļāļāļąāļāļāļąāļ§āđāļāļ·āđāļāđāļŦāđāļĢāļāļāļĢāļąāļāļĢāļēāļĒāļĨāļ°āđāļāļĩāļĒāļāļāļāļāļŠāļāļēāļāļąāļāļĒāļāļĢāļĢāļĄāđāļĨāļ°āļĢāļēāļĒāļĨāļ°āđāļāļĩāļĒāļāļāļ·āđāļāđāļāļąāļāļāļĩāđ
āđāļāļĒāđāļŦāđāļāļąāđāļāļāđāļēāļāļąāļāļāļĩāđ
Target Architecture ==> ARM (little endian)
Target Architecture Variant ==> arm926t
System Configuration ==> serial port to run getty on (ttyAMA0)
Package Selection ==> Busybox
FileSystem Images ==> cpio the root filesystem āđāļĨāļ° tar the root filesystem
Kernel ==> āļĢāļ°āļāļļāļāļ·āđāļ defconfig āđāļāđāļ âversatileâ
Kernel ==> Kernel binary format to zImage
$ make
$ ls -al output/images/
total 6712
drwxr-xr-x 2 student student 4096 2013-07-22 11:45 .
drwxr-xr-x 8 student student 4096 2013-07-22 21:03 ..
-rw-r--r-- 1 student student 1922560 2013-07-22 21:03 rootfs.cpio
-rw-r--r-- 1 student student 858843 2013-07-22 21:03 rootfs.cpio.gz
-rw-r--r-- 1 student student 2181120 2013-07-22 21:03 rootfs.tar
-rw-r--r-- 1 student student 1895000 2013-07-22 11:44 uImage
$ cp output/images/uImage ~/qemu/
āļ§āļēāļ root filesystem āđāļāļĒāļąāļ āđāļāđāļĢāļāļāļāļĢāļĩ NFS āļāļ·āđāļāļ§āđāļē ~/nfsroot āļāļĩāđāđāļāļĢāļ·āđāļāļ Host āđāļāđāđāļāļīāļāđāļāļĢāđāđāļ§āđ
$ sudo tar -xvf rootfs.tar ~/nfsroot/
$ sudo chown -R student:student ~/nfsroot
āļāļąāđāļāļāļāļāļāļēāļĢāļŠāļĢāđāļēāļ tun/tap device āđāļāļ·āđāļāļāļģāļŦāļāļāļ§āļāļāļāļāļĢāļ°āļāļāđāļāļĢāļ·āļāļāđāļēāļĒāļāđāļāļāļāļīāđāļāļ āļēāļĒāđāļāļĢāļ°āļŦāļ§āđāļēāļ QEMU āđāļĨāļ°āđāļāļĢāļ·āđāļāļ Host āđāļāļ·āđāļāđāļŦāđāļĢāļ°āļāļāļāļāļīāļāļąāļāļīāļāļēāļĢāļĨāļĩāļāļļāļāļāđāđāļāļāļāļąāļāļāļąāļ§āļ āļēāļĒāđāļ QEMU āļŠāļēāļĄāļēāļĢāļ mount āđāļāđāļĢāļāļāļāļĢāļĩ NFS āļāļĩāđāđāļāļīāļāđāļāļĢāđāđāļ§āđāļāļāđāļāļĢāļ·āđāļāļ Host āđāļāđ āđāļāļĒāļāļąāđāļāļāđāļē IP Address āđāļŦāđāļāļąāļāđāļāļĢāļ·āđāļāļ Host āđāļāđāļ 192.168.1.1 āđāļĨāļ°āļāļąāđāļāļāđāļē IP Address āļŠāļģāļŦāļĢāļąāļāļāļļāļāļāļĢāļāđ target āļāļķāđāļāđāļāļāļĩāđāļāļĩāđāļāđāļāļ·āļ 192.168.1.101
āļāļąāđāļāļāļāļāļāđāļāđāļāļāļģāļāļēāļĢāļāļīāļāļāļąāđāļāđāļāļĢāđāļāļĢāļĄ uml-utilities (āļāļĩāđāļĄāļĩāļāļģāļŠāļąāđāļ tunctl) āđāļāļ·āđāļāđāļŦāđāļŠāļēāļĄāļēāļĢāļāļāļģāļĨāļāļāļŠāļąāļāļāļēāļāļĢāļ°āļāļāđāļāļĢāļ·āļāļāđāļēāļĒ (network traffic)
$ sudo apt install uml-utilities
$ sudo tunctl -u $(whoami) -t tap1
$ sudo ifconfig tap1 192.168.1.1
$ sudo route add -net 192.168.1.0 netmask 255.255.255.0 dev tap1
$ sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
āļāļąāđāļāļāļāļāļŠāļļāļāļāđāļēāļĒāļāļģāļāļēāļĢāļĢāļąāļāđāļāļĢāđāļāļĢāļĄ QEMU āđāļāļ·āđāļāļāļģāļĨāļāļāļāļēāļĢāļāļģāļāļēāļāļāļāļĢāđāļāļŠāļĄāļāļāļāļĨāļāļąāļāļāļąāļ§ (Versatile Board) āđāļĨāļ°āļāļģāļāļēāļĢāđāļŦāļĨāļ root filesystem āļāļēāļāđāļāļĢāļ·āđāļāļ Host
$ qemu-system-arm -M versatilepb -m 128M -kernel ~/uImage -append "console=ttyAMA0 root=/dev/nfs rw nfsroot=192.168.1.1:~/nfsroot ip=192.168.1.101" -net nic -net tap,ifname=tap1,script=no -nographic
Set 'tap1' persistent and owned by uid 1000
SIOCADDRT: File exists
Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0x0
Linux version 3.9.4 (student@marabuntu) (gcc version 4.7.3 (Buildroot 2013.05) ) #1 Mon Jul 22 11:44:32 PDT 2013
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00093177
CPU: VIVT data cache, VIVT instruction cache
Machine: ARM-Versatile PB
Memory policy: ECC disabled, Data cache writeback
sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512
Kernel command line: console=ttyAMA0 root=/dev/nfs rw nfsroot=192.168.1.1:/home/student/nfsroot ip=192.168.1.101
PID hash table entries: 512 (order: -1, 2048 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
__ex_table already sorted, skipping sort
Memory: 128MB = 128MB total
Memory: 126192k/126192k available, 4880k reserved, 0K highmem
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
vmalloc : 0xc8800000 - 0xff000000 ( 872 MB)
lowmem : 0xc0000000 - 0xc8000000 ( 128 MB)
modules : 0xbf000000 - 0xc0000000 ( 16 MB)
.text : 0xc0008000 - 0xc0342850 (3307 kB)
.init : 0xc0343000 - 0xc035f87c ( 115 kB)
.data : 0xc0360000 - 0xc0385440 ( 150 kB)
.bss : 0xc0385440 - 0xc039f78c ( 105 kB)
NR_IRQS:224
VIC @f1140000: id 0x00041190, vendor 0x41
FPGA IRQ chip 0 "SIC" @ f1003000, 13 irqs
Console: colour dummy device 80x30
Calibrating delay loop... 300.44 BogoMIPS (lpj=1502208)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
Setting up static identity map for 0xc027e748 - 0xc027e7a0
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
Serial: AMBA PL011 UART driver
dev:f1: ttyAMA0 at MMIO 0x101f1000 (irq = 44) is a PL011 rev1
console [ttyAMA0] enabled
dev:f2: ttyAMA1 at MMIO 0x101f2000 (irq = 45) is a PL011 rev1
dev:f3: ttyAMA2 at MMIO 0x101f3000 (irq = 46) is a PL011 rev1
...
Console: switching to colour frame buffer device 80x60
brd: module loaded
physmap platform flash device: 04000000 at 34000000
physmap-flash physmap-flash.0: map_probe failed
smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <
nico@fluxnic.net
>
eth0: SMC91C11xFD (rev 1) at c8800000 IRQ 57 [nowait]
eth0: Ethernet addr: 52:54:00:12:34:56
mousedev: PS/2 mouse device common for all mice
TCP: cubic registered
NET: Registered protocol family 17
VFP support v0.3: implementor 41 architecture 1 part 10 variant 9 rev 0
eth0: link up
IP-Config: Guessing netmask 255.255.255.0
IP-Config: Complete:
device=eth0, hwaddr=52:54:00:12:34:56, ipaddr=192.168.1.101, mask=255.255.255.0, gw=255.255.255.255
host=192.168.1.101, domain=, nis-domain=(none)
bootserver=255.255.255.255, rootserver=192.168.1.1, rootpath=
input: AT Raw Set 2 keyboard as /devices/fpga:06/serio0/input/input0
input: ImExPS/2 Generic Explorer Mouse as /devices/fpga:07/serio1/input/input1
VFS: Mounted root (nfs filesystem) on device 0:9.
Freeing init memory: 112K
Starting logging: OK
Initializing random number generator... done.
Starting network...
ip: RTNETLINK answers: File exists
Welcome to Burapha Embedded System Lab
Burapha login:
# ls
# ls -al
total 20
drwxr-xr-x 2 default default 4096 Jul 23 2013 .
drwxr-xr-x 17 default default 4096 Jul 23 2013 ..
-rw------- 1 root root 10 Jul 23 2013 .ash_history
-rw-r--r-- 1 default default 0 May 31 2013 .bash_history
-rw-r--r-- 1 default default 175 May 31 2013 .bash_logout
-rw-r--r-- 1 default default 161 May 31 2013 .bash_profile
#
