RTEMS + EPICS on Motorola MVME6100 ("Beatnik")
joel at rtems.org
Tue Mar 7 20:49:38 UTC 2017
On Tue, Mar 7, 2017 at 1:19 AM, Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:
> On 22/02/17 15:04, Michael Westfall wrote:
>> We are using RTEMS 4.10.2 + EPICS R220.127.116.11 for the beatnik and mvme2307
>> What I've noticed is that the boot files created for the beatnik BSP are
>> more than twice the size of the boot files for the mvme2307. In some cases,
>> the boot file is too large for the "user download buffer" so the tftpGet
>> fails on startup.
>> I realize that these two BSPs use different PPC CPUs (7400 vs. 604), but
>> I wonder why the great disparity in compiled file size.
> I don't think the instruction set makes a big difference. I would look at
> the ELF file to figure out how the sections are placed and how big the are,
> e.g. objdump -h.
You can double check me on this but the motorola_powerpc family of BSPs
bootloader to a compressed executable image. If the beatnik does not do
that, it could
easily be 2-4 times larger for exactly the same code.
> Sebastian Huber, embedded brains GmbH
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail : sebastian.huber at embedded-brains.de
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