[Qemu-ppc] How to write to the serial device on the ppce500 board?

[Andreas Rasmusson]

Hi

I'm using qemu 2.3.93 and I'm experimenting with the ppce500 board, 

booting with it u-boot.e500.

It starts ok and prints to the console. 

My own bare-metal hello-world program that simply writes to 0xe0004500

does not, unfortunately :-/, 

so I suspect that u-boot does some more initialisation of the hardware 

before it writes to 0xe0004500.

u-boot.e500 is only included as a binary file in qemu's source-tree

   http://git.qemu.org/?p=qemu.git;a=history;f=pc-bios/u-boot.e500;hb=HEAD

My questions.

1. Is its source code available for me to study somewhere?

2. Do I need to configure something before I can write to the serial port?

  (I'm suspecting the MMU since when I write to 0xe0004500 I get

  a POWERPC_EXCP_DTLB (set in  mmu_helper.c:1647)