[PATCH v3 0/3] SoCFPGA: L3 NIC driver
Arnd Bergmann
arnd at arndb.de
Thu Dec 4 08:30:58 PST 2014
On Sunday 30 November 2014 21:53:31 Robert Schwebel wrote:
> On Sun, Nov 30, 2014 at 12:51:58PM +0100, Arnd Bergmann wrote:
> > > This series adds support for the SoCFPGA L3 NIC. As the memory range has
> > > a lot of holes, where you can not read from, syscon can not be used for
> > > this IP core. Instead add a new driver, that knows about all the allowed
> > > ranges and guards the access via regmap.
> >
> > What is an L3 NIC?
>
> Fron the SoCFPGA manual:
>
> "
> The hard processor system (HPS) level 3 (L3) interconnect and level 4
> (L4) peripheral buses are implemented with the ARM CoreLinkTM Network
> Interconnect (NIC-301). The NIC-301 provides a foundation for a
> high-performance HPS interconnect based on the ARM Advanced
> Microcontroller Bus Architecture (AMBA) Advanced eXtensible Interface
> (AXI), Advanced High-Performance Bus (AHBTM), and Advanced Peripheral
> Bus (APBTM) protocols. The L3 interconnect implements a multilayer,
> nonblocking architecture that supports multiple simultaneous
> transactions between masters and slaves, including the Cortex-A9
> microprocessor unit (MPU) subsystem. The interconnect provides five
> independent L4 buses to access control and status registers (CSRs) of
> peripherals, managers, and memory controllers Related Information
> http://infocenter.arm.com/ Additional information is available in the
> AMBA Network Interconnect (NIC-301) Technical Reference Manual, revision
> r2p3, which you can download from the ARM info center website.
Please put something like this in the introductory mail and later
into the pull request then. If the l3-nic is an ARM nic-301, shouldn't
the compatible string be "arm,nic-301"?
Arnd
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