Re: [microblaze-uclinux] systemace driver freezes linux

[Dries Schellekens <dries.schellekens@xxxxxxxxxxxxxxxx>]

Paul Hartke wrote:

> I think you are seeing expected behavior.  As mentioned a few times in other
> posts, I believe you need to configure the FPGA device from an acefile which
> contains both the fpga bitfile and the kernel.  There is more info on how to
> create an acefile in the xupv2p design on the website.

As I explained in my original email, I have 2 problems:

1) I can not load a design from a CF card (e.g. uclinux_xupv2p.ace from 
uclinux-xupv2p_rev_1_1 design on the website). LED D11 (SYSTEM ACE 
ERROR) is red, presumably indicating some error.

2) If I load my design using JTAG (impact for FPGA bitfile + xmd for 
linux kernel), the Linux System Ace driver does not work, i.e. Linux 
freezes. I want to use the CF card as root file system (and maybe swap 
partition).

> When I do this and enable the system ace device driver, I get the following
> in the boot log:
> ..
> Initializing SystemAce driver

For me Linux stops here.

> Partition check:
>  xsysacea: xsysacea1
> System ACE at 0x41800000 mapped to 0x41800000, irq=2, 509040KB
> ..
> The 512MB CF card only has the uclinux_xupv2p.ace file on it and its
> formated with mkdosfs as described in the XUPV2P user guide.

I am using a 256 MB CF card. Could this be the problem? The user guide 
gives the mkdosfs options for 128 MB and 512 MB, but not for 256 MB.

For the user guide:
mkdosfs –v –F 16 -R 1 –s 8 –n XLNX_XUP X: (for a 128 MB CF card)
mkdosfs –v –F 16 -R 1 –s 16 –n XLNX_XUP X: (for a 512 MB CF card)

I tried both combinations, but neither works. Is one restricted to the 
sizes in the user guide (16, 128, 256 and 1024 MB)?


Cheers,

Dries

> Quoting Dries Schellekens <dries.schellekens@xxxxxxxxxxxxxxxx>:
> > Hey,
> >
> > I am also experiencing problems with SystemAce on the XUP V2P board.
> >
> > The SYSACE Self Test is successfull (see attachment #1).
> >
> > However loading my design from a CompactFlash card fails. The SYSTEM ACE
> > ERROR LED blinks when no card is present, but when I insert the card the
> > LED stays red and my design is not loaded.

Problem 1#

> > If I enable the System Ace driver, Linux freezes completely (see
> > difference between boot log in attachment #2 and #3).

Problem 2#

> > What could be wrong? I also added my configuration in attachment:
> > system.{mss,mhs} and generated auto-config.in.
> >
> >
> > Cheers,
> >
> > Dries

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