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Subject: Re: [RFC PATCH v2 0/1] FPGA subsystem core
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Mon, 07 Oct 2013 08:07:00 -0700
To: monstr@monstr.eu, Michal Simek <monstr@monstr.eu>
CC: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Pavel Machek <pavel@denx.de>, Michal Simek <michal.simek@xilinx.com>,
        linux-kernel@vger.kernel.org, Alan Tull <atull@altera.com>,
        Dinh Nguyen <dinguyen@altera.com>,
        Philip Balister <philip@balister.org>,
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Special soft IP presenting a PCI device to the host.

Michal Simek <monstr@monstr.eu> wrote:
>On 10/07/2013 04:55 PM, H. Peter Anvin wrote:
>> If I recall correctly we simply poked at the FPGA directly from
>userspace. 
>Not ideal by any means and also meant we had to have a backup recovery
>mechanism as it meant
>that the FPGA had to be programmed already as the bus interface was in
>soft IP.
>
>ok. How was that physical hardware connection to device you wanted to
>talk?
>Was it any special IP with MMIO? Or gpio jtag emulation or similar?
>
>Thanks,
>Michal

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