From Milkymist Wiki

Contents 1 Build and Install QEMU 2 Basic usage 3 GDB 4 Networking 5 binfmt_misc 6 Audio

[edit] Build and Install QEMU

Mico32 support is available in the QEMU source tree and in QEMU releases since 0.10. If your distribution packages an outdated version, you will need to build QEMU from the source code. To get the QEMU source code you will need the git version control system installed. You can get git from git-scm.com

Prior to building QEMU sure you have libsdl-dev installed (following line works on debian & ubuntu) :

# aptitude install libsdl-dev

In fedora:

# yum install SDL-devel

On OS X install SDL from source code (the frameworks installed by the SDL OS X disk image aren't recognized by the configure script):

$ curl http://www.libsdl.org/release/SDL-1.2.14.tar.gz -o SDL-1.2.14.tar.gz
$ tar xvzf SDL-1.2.14.tar.gz
$ cd SDL-1.2.14
$ ./configure 
$ make 
# make install

Checkout the latest version of the QEMU source code:

$ git clone git://git.qemu.org/qemu.git
$ cd qemu

Compile and install qemu for lm32 target with sdl support :

$ ./configure --target-list="lm32-softmmu" --enable-sdl [other options? see configure --help]
  on OS X:
$ ./configure --target-list="lm32-softmmu" --enable-sdl --enable-cocoa
$ make
# make install

[edit] Basic usage

Command line to run Flickernoise using qemu :

$ qemu-system-lm32 -M milkymist -kernel flickernoise

Command line to run Linux using qemu :

$ qemu-system-lm32 -M milkymist -nographic -kernel [ELF kernel] -initrd [initrd] \
-append "root=/dev/ram"

Command line to run the sample Hello World application :

$ qemu-system-lm32 -M milkymist -kernel compile-flickernoise/build_dir/bsp-milkymist/lm32-rtems4.11/c/milkymist/testsuites/samples/hello/hello.exe -nographic

[edit] GDB

It is also possible to use GDB. For this purpose, add “-s -S” to the above command line, and run:

 $ lm32-linux-gdb vmlinux
 (gdb) target remote localhost:1234

[edit] Networking

 $ lm32-softmmu/qemu-system-lm32 -M milkymist -kernel bios.elf
 -nographic -net nic -net user,net=172.16.0.0/24,host=172.16.0.254,tftp=/milkymist

To use the real network: change the option to -net nic -net tap

[edit] binfmt_misc

• create a /usr/bin/mmqemu.sh file with:

#!/bin/sh
exec qemu-system-lm32 -M milkymist -kernel $1

• make it executable

chmod 755 /usr/bin/mmqemu.sh

• register the binfmt format

echo ':lm32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x8a:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/mmqemu.sh:' > /proc/sys/fs/binfmt_misc/register

• you can now run MM binaries directly from the shell, i.e. "./flickernoise" will automatically run it in a QEMU window.

[edit] Audio

In case having problems setting up right audio device just try this:

export QEMU_AUDIO_DRV=none