| 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: -
Change directory to the ARM kernel source: root@tbdev1[553]: cd /usr/src/arm-linux -
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 -
The RAM disk defaults to 8192KB, so you don't need to change that with make menuconfig. -
Compile the kernel: root@tbdev1[555]: make zImage -
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 -
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/  arm-ramdisk.gz -
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 > -
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 -
Download the ARM RAM disk file: >load arm-ramdisk.gz c0800000 loading ... 1699015 bytes loaded cksum 0000D9C8 done -
Download the ARM kernel file: >load arm-zImage c0008000 loading ... 646240 bytes loaded cksum 00004DF2 done -
Boot the kernel by executing go at memory address c0008000: >go c0008000 -
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 Fri Aug 24 14:53:14 MST 2001 Processor: Intel StrongARM-1110 revision 6 Architecture: BSE nanoEngine On node 0 totalpages: 8192 zone(0): 8192 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: root=/dev/ram Calibrating delay loop... 194.15 BogoMIPS Memory: 32MB = 32MB total Memory: 26496KB available (1268K code, 260K data, 60K init) Dentry-cache hash table entries: 4096 (order: 3, 32768 bytes) Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes) Page-cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 2048 (order: 2, 16384 bytes) POSIX conformance testing by UNIFIX Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Starting kswapd v1.8 pty: 256 Unix98 ptys configured block: queued sectors max/low 17530kB/5843kB, 64 slots per queue RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize Uniform Multi-Platform E-IDE driver Revision: 6.31 ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx cerf89x0:cerf89x0_probe() cerf89x0.c: (kernel 2.3.99) Russell Nelson, Andrew Morton eth0: cs8900 rev J Base 0xF0000300<6>, IRQ 0, MAC 00:50:15:03:00:19 bad dev id: got 0x19001900, expected 0x12098086 (0) bad dev id: got 0x19001900, expected 0x12098086 (0) RAMDISK: Compressed image found at block 0 Freeing initrd memory: 4096K loop: loaded (max 8 devices) Serial driver version 5.02 (2000-08-09) with no serial options enabled Testing ttyS0 (0x0300, 0x0000)... ttyS03 at 0x0300 (irq = 10) is a 16550A SA1100 serial driver version 1.3 ttyS0 on SA1100 UART1 (irq 15) ttyS1 on SA1100 UART2 (irq 16) ttyS2 on SA1100 UART3 (irq 17) SA1100 Real Time Clock Driver v0.02 PPP generic driver version 2.4.1 PPP Deflate Compression module registered PPP BSD Compression module registered Linux PCMCIA Card Services 3.1.22 options: none SA-1100 PCMCIA (CS release 3.1.22) NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 2048 bind 2048) IP-Config: Incomplete network configuration information. NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. NetWinder Floating Point Emulator V0.95 (c) 1998-1999 Rebel.com VFS: Mounted root (ext2 filesystem). Freeing init memory: 60K INIT: version 2.78 booting INIT: Entering runlevel: 2 Starting Network bash-2.04# You are now at the bash prompt on the MediaEngine. -
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. -
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)) #1 Fri 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. | 