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The code in this directory has been taken WITH PERMISSION from
Gabriel Paubert, paubert@iram.es. The main reason for having
a separate bootloader for PreP compliant firmware is that the
initial code is relocated by firmware at an unknow address
(actually 0x5000 on motorola MCP750) and that as Gabriel I
think having a relocatable bootloder code is a must.
So the way of building a binary executable that can be booted via
hard disk or network boot goes like this :
- make a RTEMS executable,
- put is as data section in the bootloder binary,
- relink the loader (see make-exe macros for details),
I would like to thank Gabriel for his support and his code.
The original code can be found in form of a patch to official linux
kernel at (I insist not vger ppc kernel or Imac ppc kernels!!) :
<ftp://vlab1.iram.es/pub/linux-2.2/>
After applying the patch, the code is located in a new directory
called prepboot.
(NB : note use ftp not netscape...)
Note that the actual code differs a lot since Gabriel choose to use
a CHRP compliant mapping instead of a Prep Mapping to save
BATs. I had no time to upgrade the code to its new one allthough
I agree it should be done...
I have also splitted the original code to have a more modular
design enabling to reuse code between the loader and RTEMS
initialization (e.g printk, ...).
Eric Valette (valette@crf.canon.fr)
**************************************************
2003/5/7, Greg Menke, gregory.menke@gsfc.nasa.gov
Reworked the pci bus 0 initialization a little and added support for
configuring an arbitrary number of other busses & their respective
bridges. Also added support for configuring IO ranges below 0x10000,
which I think is reasonable given this is a PowerPC bsp.
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