eagle keeper wrote:

Hi all, and sorry for my question. I have not very clear what to do to compile uboot for pq2fadsvr with mpc8275 processor. I mean: it is an evaluation board supported by uboot isn't it? And if so, why doesn't exist a configuration file? Is it enought to lighlty modify the 8260ads configuration file? And wich entries?

Thank in advance

Lele

In the top level directory, do the following: $ grep PQ2FADS Makefile PQ2FADS_config \ PQ2FADS_lowboot_config \ PQ2FADS-VR_config \ PQ2FADS-VR_lowboot_config \ PQ2FADS-ZU_config \ PQ2FADS-ZU_lowboot_config \ PQ2FADS-ZU_66MHz_config \ PQ2FADS-ZU_66MHz_lowboot_config \

I would expect PQ2FADS-VR_config or PQ2FADS-VR_lowboot_config would work (if you don't have the "lowboot" version, you may want to update your u-boot copy from the head of CVS).

The lowboot is configured to boot with the Boot Memory Space HWCW[BMS] set to 1 (i.e. booting at 0x00000000) and is the recommended configuration. In this case you _must_ use the HRCW from flash rather than from the FPGA (sorry, I forgot what they called the registers in the FPGA). I highly recommend using the HRCW from flash and lowboot.

If you live right ;-), you can actually make a "lowboot" and a "high boot" version and program both into your board. Run with the lowboot version and, if you screw up u-boot[low] (not that I've ever done that ;-), you can recover by switching the configuration to use the FPGA-supplied HRCW to "boot high" out of the alternate u-boot image.

gvb