[PATCH 16/18] bsp/altera-cyclone-v: Add Alteras hwlib

Ralf Kirchner ralf.kirchner at embedded-brains.de
Thu Mar 13 08:35:03 UTC 2014

Hi Joel,
Answers below.

Am 12.03.2014 17:50, schrieb Joel Sherrill:
> Thanks for the long answer on the other email. It put me in the
> right frame.
> On 3/12/2014 11:22 AM, Ralf Kirchner wrote:
>> hwlib has ben reduced to only those files actually used by the BSP.
> Asking ignorantly, what is the value long-term of doing this? Does it
> make it easier
> or harder to merge future versions? Add support for other peripherals.
It makes it a little more difficult. But really only a little bit. I
have kept the same directory structure as used by altera. Thus files can
still be found in the same place. I have left out only whole files. Thus
those files which are there can be compared directly.
Adding files which are currently left out should be easy: Simply copy
them into the corresponding sub-directory, add them to the Makefile.am,
run the required bootstrap and use them.

If this would help I could also split the process of adding the hwlib a
little further:
One commit for adding the whole hwlib.
And another commit for deleting those files currently not required.

> How is hwlib versioned by Altera? Will it be easy to go back to the same
> version
> and get matching pieces?
Currently they do offer old versions for download on their web site.
Let's hope this will not change.
> Other than space and compile time, what's the benefit/
Download time, upload time, time for searching and reading within the
sources, time for the mailinglist moderator to approve mails with big
patches ;-).
Actually I have reduced the size of this patch because the previous
version of this patch was over 18 MBytes big (applied). Sebastian and I
thought this will never get accepted. Now I have reduced it to about 3,4
MBytes (applied).
> Looking back at the current TCP/IP stack, it left out pieces which were
> not viewed
> as necessary. The new approach is what I call a deep net.  Deep net
> seems to
> provide a stronger foundation. I think we are looking at shallow versus
> deep with
> this and want to make sure we consciously choose.
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