On 11/22/07, Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote: > > On Thu, 2007-11-22 at 19:00 -0500, Jon Smirl wrote: > > > It seems like AMCC does provide the necessary infos for 4xx > > processors > > > though. Jon, do you think what they provide is enough to use an open > > > source debugger ? > > > > Do you have a link to the info? > > Not at hand, but easy to find from AMCC main product page, you can then > go to the various eval board download pages, and some of the d/l are > infos for JTAG debugger manufacturers.
Dominick Rath wrote OpenOCD (open source JTAG) as his senior thesis in college, he graduated this spring and has a job now. I've sent mail to him but he may be a lost cause. Thesis: http://developer.berlios.de/docman/display_doc.php?docid=1367&group_id=4148 Low cost dev tools are an important part of the CPU selection process. We went through four ARM CPUs before deciding on the MPC5200. We were able to get ARM eval boards and JTAGs for under $500 for each of the eval CPUs. We used the low cost evals to screen the CPUs, we didn't want spend $5-10K until we are 90% sure we are going to use the CPU. I returned one $5K eval board, it was a pain and it took over six months to get a refund. We have also learned the hard way about "port and forget" several of the CPUs we picked had Linux ports, but the ports were five years old. When we pushed the vendors for more recent kernels the typical answer was, send us $50,000 and we'll see what we can do. We're not going to send in $50K for a CPU we haven't decided to use, that answer simply resulted in us changing CPUs. An example of this is the NXP LPC3180, $9 with a FPU, but only a 2.6.5 kernel. I've also only seen ARM CPUs being used in schools. You can get ARM eval boards and a JTAG for under $100 on some ARM CPUs. AFAIK there is no low cost PowerPC option suitable for classroom use. -- Jon Smirl [EMAIL PROTECTED] _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
