RTEMS 6.1-rc7
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Motorola PowerPC

The code in this directory has been taken WITH PERMISSION from Gabriel Paubert, paube.nosp@m.rt@i.nosp@m.ram.e.nosp@m.s. 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 (valet.nosp@m.te@c.nosp@m.rf.ca.nosp@m.non..nosp@m.fr)

2003/5/7, Greg Menke, grego.nosp@m.ry.m.nosp@m.enke@.nosp@m.gsfc.nosp@m..nasa.nosp@m..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.