Re: [microblaze-uclinux] custom FPGA board

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Cristian,

Cristian-Raul CIRESSAN wrote:

> I am working to put Petalinux on a custom FPGA board which has only 8MB
> of ZBT RAM and I have these questions:
>  
> 1) is this amount of memory enough to run a "reduced" petalinux
> configuration ?

It should be fine, nothing "reduced" required.  The kernel is about 1 -
1.4 Mbyte, filesystem and working memory requiremenst will depend on
what your application is doing.    Watch out for C++ apps and the STL,
they get big fast.

> 2) I understand that the cache memory is a nice-to-have feature not a
> requirement in the HW reference design. Is this true?

Well, a cache is nice to have if you want devent performance.  New
MicroBlaze version allows microcaches as small as 512 bytes, even this
would be recommended strongly vs no cache at all.

> and the last question:
> 3) Can the 9.1 Xilinx tools be used with v0.30 Petalinux release or
> should I use v0.20 ?

Xilinx 9.1 + PetaLogix 0.30 is just fine.

Cheers,

John

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