|
|
Introduction------------
This configuration offers a cross-build of (a subset of) the build-bootstrappackage selection for the mips64 architecture (Malta machines with a 20Kc CPU)as emulated by qemu-system-mips64.It includes support for all the hardware emulated by qemu, a working udev,kernel and userland support for TCP/IP networking, and more.
With qemu and the resulting build you can at least:- boot the kernel and first stage initrd,- execute a shell from the initrd,- mount NFS file systems,- load the second stage from a CD-ROM or a HTTP server,- and install packages from the CD on a hard disc.
The packages included should be sufficient for native builds on the targetedplatform.
Quick Start-----------
- Direct boot with serial console: qemu-system-mips64 -cdrom bbs-mips-malta-qemu_cd1.iso -hda /srv/qemu.hda \ -kernel build/bbs-mips64-malta-qemu-TRUNK-mips-64-EB-mips64-cross-generic-expert/boot/vmlinux \ -initrd build/bbs-mips64-malta-qemu-TRUNK-mips-64-EB-mips64-cross-generic-expert/ROCK/target-finish/initrd.img \ -append "console=ttyS0 root=/dev/ram0" -nographic -M malta
Hints And Known Bugs--------------------
- To use the CD image in qemu, create it after the build has finished: ./scripts/Create-ISO bbs-mips64-malta-qemu bbs-mips64-malta-qemu
- To use a hard disk in qemu, create it with e.g.: qemu-img create /srv/qemu.hda 2048M
- The kernel and initrd image can also be found in the boot/ directory of the CD-ROM image.
- When using a console on the serial port, be sure to enter 'ttyS0' as the terminal device in boot stage 2, or you won't get to see the command line. Enter 'tts/0' to also set the baud rate of the serial port.
- To access HTTP or NFS servers in qemu, add the following options: -net nic -net tap
You need root privileges for this, or have your system administrator set it up for you. When qemu starts it will create a network interface (tap0) on the host system and add an IP address/netmask (172.20.0.1/16) to it:
host:/# ip addr show dev tap0 19: tap0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500 link/ether 00:ff:e1:75:9a:a0 brd ff:ff:ff:ff:ff:ff inet 172.20.0.1/16 brd 172.20.255.255 scope global tap0 inet6 fe80::2ff:e1ff:fe75:9aa0/64 scope link valid_lft forever preferred_lft forever
In the first boot stage of the emulated system, execute a shell, set up the network link and add an IP address on the same network:
sh-3.2# ip link set up dev eth0 [ 41.026595] eth0: link up sh-3.2# ip addr add 172.20.0.20/16 dev eth0
You should now be able to reach the host system:
sh-3.2# ping -c3 172.20.0.1 PING 172.20.0.1 (172.20.0.1): 56 octets data 64 octets from 172.20.0.1: icmp_seq=0 ttl=64 time=16.7 ms 64 octets from 172.20.0.1: icmp_seq=1 ttl=64 time=1.6 ms 64 octets from 172.20.0.1: icmp_seq=2 ttl=64 time=1.1 ms --- 172.20.0.1 ping statistics --- 3 packets transmitted, 3 packets received, 0% packet loss round-trip min/avg/max = 1.1/6.4/16.7 ms
|
