On Sun, Nov 30, 2014 at 12:51:58PM +0100, Arnd Bergmann wrote:

quoted

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.
"

rsc
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