Booting the Brightstar Engineering MediaEngine
Before you can boot the MediaEngine, you need to compile the kernel for it. The buildtoolchain script in Chapter 3 configured the kernel and the kernel headers but didn't compile the kernel. This section describes how to compile the 2.4.2 kernel for the MediaEngine, generate a RAM disk, download the kernel and RAM disk using TFTP, and then boot the MediaEngine. Booting the MediaEngine differs from booting the RPX-CLLF in that the kernel and RAM files are downloaded separately.
Here are the steps for booting the MediaEngine:
1. | |
2. |
The MediaEngine and Brightstar Engineering's nanoEngine share the same default configuration file: arch/arm/def-config/nanoengine. Configure the kernel by using this default config file and two make commands: root@tbdev1[554]: make nanoengine_config root@tbdev1[555]: make oldconfig |
3. |
The RAM disk defaults to 8192KB, so you don't need to change that with make menuconfig. |
4. |
Compile the kernel: root@tbdev1[555]: make zImage
|
5. |
The new kernel image is arch/arm/boot/zImage. Copy it to the /tftpboot directory: root@tbdev1[556]: cp arch/arm/boot/zImage /tftpboot/arm-zImage
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6. |
Make the ARM target root filesystem by using the buildrootfilesystem script: root@tbdev1[557]: cd /root/cross/buildrootfilesystem root@tbdev1[558]: buildrootfilesystem arm ramdisk buildrootfilesystem will create the ARM target root filesystem file called /tftpboot |
7. |
Connect the MediaEngine's serial port to tbdev1's COM1 port. Run minicom and then reboot the MediaEngine. Look for the Brightstar Engineering (BSE) banner Boot: BSE 2001 R1.0 SN# 00:50:15:03:00:19 > |
8. |
Set the MediaEngine's IP address, TFTP server, and netmask addresses by using these commands: >set myip 192.168.1.21 >set serverip 192.168.1.11 >set netmask 255.255.255.0 |
9. |
Download the ARM RAM disk file: >load arm-ramdisk.gz c0800000
loading ... 1699015 bytes loaded cksum 0000D9C8
done
|
10. | |
11. |
Boot the kernel by executing go at memory address c0008000: >go c0008000
|
12. |
The MediaEngine should boot, and you should see this: Uncompressing Linux.......................... done, booting the kernel. Linux version 2.4.2-rmk1-np2-bse (root@tbdev1) (gcc version 2.95.3 20010315 (release)) #1 You are now at the bash prompt on the MediaEngine. |
13. |
Try out the network connection and check for proper DNS configuration: bash-2.04# ping yahoo.com
PING yahoo.com (216.115.108.245): 56 data bytes
64 bytes from 216.115.108.245: icmp_seq=0 ttl=246 time=49.7 ms
64 bytes from 216.115.108.245: icmp_seq=1 ttl=246 time=55.5 ms
64 bytes from 216.115.108.245: icmp_seq=2 ttl=246 time=57.8 ms
64 bytes from 216.115.108.245: icmp_seq=3 ttl=246 time=100.8 ms
--- yahoo.com ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 49.7/65.9/100.8 ms
Pinging yahoo.com returns the IP address 216.115.108.245, which confirms proper DNS configuration. Pings are returned, so you know the network is running. |
14. |
Run helloworld, which is located in the /tmp directory: bash-2.04# cd /tmp bash-2.04# ls -l total 24 -rwxr-xr-x 1 0 0 22266 Aug 24 2001 helloworld-arm-linux -rw-r--r-- 1 0 0 120 Aug 24 2001 helloworld.c bash-2.04# ./helloworld-arm-linux Hello world 1 times! Hello world 2 times! Hello world 3 times! Hello world 4 times! Hello world 5 times! Hello world 6 times! Hello world 7 times! Hello world 8 times! Hello world 9 times! |
The Brightstar Engineering MediaEngine is now up and running.
Brightstar Engineering MediaEngine Target PBR Review
In this section, the seven PBRs are reviewed for the MediaEngine. The output from the “Booting the Brightstar Engineering MediaEngine” section earlier in the chapter provides all the information necessary for this review. Remember that each target board needs to fulfill the seven PBRs in order to be used in Project Trailblazer.
PBR-1 for Brightstar Engineering MediaEngine
The target board should use Linux kernel 2.4 or greater. Here's the MediaEngine console output during the boot process:
Linux version 2.4.2-rmk1-np2-bse (root@tbdev1) (gcc version 2.95.3 20010315 (release)) #1Fri Aug 24 14:53:14 MST 2001 Processor: Intel StrongARM-1110 revision 6 Architecture: BSE nanoEngine
PBR-1 is fulfilled because Linux version 2.4.2 boots.
PBR-2 for Brightstar Engineering MediaEngine
The target board will execute the bash shell. Exiting from the bash shell re-executes the bash shell. On the MediaEngine console, exit from the bash shell by using the exit command:
bash-2.04# exit
exit
bash-2.04#
PBR-2 is fulfilled because exiting from bash respawns bash. init is properly configured.
PBR-3 for Brightstar Engineering MediaEngine
The system should execute the bash shell without security authentication. Here's the MediaEngine console output during the boot process:
INIT: version 2.78 booting INIT: Entering runlevel: 2 Starting Network bash-2.04#
PBR-3 is fulfilled because init starts bash without authentication.
PBR-4 for Brightstar Engineering MediaEngine
The system should boot, initialize the Ethernet hardware, set a static IP address, and be configured to use DNS. At the bash prompt, use ifconfig to display the Ethernet hardware configuration and use ping to verify proper DNS configuration:
bash-2.04# ifconfig eth0 Link encap:Ethernet HWaddr 00:50:15:03:00:19 inet addr:192.168.1.21 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5 errors:0 dropped:2 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 Base address:0x300 bash-2.04# ping yahoo.com PING yahoo.com (216.115.108.243): 56 data bytes 64 bytes from 216.115.108.243: icmp_seq=0 ttl=246 time=66.3 ms 64 bytes from 216.115.108.243: icmp_seq=1 ttl=246 time=68.8 ms
PBR-4 is fulfilled because the Ethernet hardware is initialized. The target board's resolver translated yahoo.com to 216.115.108.243. This verifies proper DNS configuration.
PBR-5 for Brightstar Engineering MediaEngine
The system should contain the ping program to debug network programs:
bash-2.04# ping yahoo.com
PING yahoo.com (216.115.108.243): 56 data bytes
64 bytes from 216.115.108.243: icmp_seq=0 ttl=246 time=66.3 ms
64 bytes from 216.115.108.243: icmp_seq=1 ttl=246 time=68.8 ms
PBR-5 is fulfilled because the yahoo.com ping is successful.
PBR-6 for Brightstar Engineering MediaEngine
The system should be capable of executing the Project Trailblazer compiled version of helloworld. At the bash prompt, execute the cross-compiled helloworld program:
bash-2.04# ./helloworld-arm-linux
Hello world 1 times!
Hello world 2 times!
Hello world 3 times!
. . .
PBR-6 is fulfilled because the cross-compiled version of helloworld executes.
PBR-7 for Brightstar Engineering MediaEngine
The system should use the current version of GNU glibc. At the bash prompt, list the library directory and confirm the current versions:
bash-2.04# ls /lib
ld-2.2.3.so libncurses.so.5.2 libresolv.so.2
ld-linux.so.2 libnss_dns-2.2.3.so librt-2.2.3.so
libc-2.2.3.so libnss_dns.so.2 librt.so.1
libc.so.6 libnss_files-2.2.3.so libstdc++-3-libc6.1-2-2.10.0.so
libdl-2.2.3.so libnss_files.so.2 libstdc++-libc6.1-2.so.3
libdl.so.2 libproc.so.2.0.7 libutil-2.2.3.so
libm-2.2.3.so libpthread-0.9.so libutil.so.1
libm.so.6 libpthread.so.0
libncurses.so.5 libresolv-2.2.3.so
PBR-7 is fulfilled because target boots with the current version of GNU glibc.
The Brightstar Engineering MediaEngine fulfills all the PBRs.