[Qemu-ppc] How to write bare-metal hello world program for qemu-system-ppc

[Kaiyuan]

Hello, all


I have added a custom device to PowerPC board hw/ppc/virtex_ml507.c. The next 
step for me is to verify the function of this new device by writing a demo 
program. The problem for me is that I am newbie to bare-metal programming 
without OS/bootloader and PowerPC assembly language and how to write demo.


I googled out some posts for beginner like 
http://www.opensourceforu.com/2011/07/qemu-for-embedded-systems-development-part-2/


This is a hello world tutorial for qemu-system-arm. But I don't know how to 
port it to PowerPC environment because the assemblies are different between ARM 
and PowerPC.


How to write a bare-metal program that prints "hello, world" to serial port for 
qemu-system-ppc? Could you give some suggestions? 


Thanks,
Kaiyuan Liang