CoreSight framework and drivers

[pratikp at codeaurora.org]

This RFC is aimed at introducing CoreSight framework as well as
individual CoreSight trace component drivers adhering to ARM
CoreSight specification. Some prior discussion on this can be
referred at [1].

There are 3 kinds of CoreSight trace components:

* Sources: Responsible for producing trace data to provide
  visibility for the associated entity.

* Links: Transport components that carry trace data.

* Sinks: Collectors for storing trace data or acting as conduits
  for off-chip trace data collection.

These components can be connected in various topologies to suite
a particular SoCs tracing needs.

Framework is responsible for gathering and using the information
about the registered CoreSight components and their connections
to allow it to dynamically deduce the sequence of components
representing a connection from a CoreSight source to the
currently selected CoreSight sink. This helps the framework to
program the correct set of components to satisfy user request.

[1] http://comments.gmane.org/gmane.linux.ports.arm.kernel/204591

Pratik Patel (8):
  coresight: add CoreSight core layer framework
  coresight: add CoreSight TMC driver
  coresight: add CoreSight TPIU driver
  coresight: add CoreSight ETB driver
  coresight: add CoreSight Funnel driver
  coresight: add CoreSight Replicator driver
  coresight: add CoreSight STM driver
  coresight: add CoreSight ETM driver

 Documentation/devicetree/bindings/arm/coresight.txt |  110 ++
 arch/arm/include/asm/hardware/cp14.h                |  540 ++++++
 drivers/Kconfig                                     |    2 +
 drivers/Makefile                                    |    1 +
 drivers/coresight/Kconfig                           |   60 +
 drivers/coresight/Makefile                          |    8 +
 drivers/coresight/coresight-etb.c                   |  467 +++++
 drivers/coresight/coresight-etm-cp14.c              |  510 ++++++
 drivers/coresight/coresight-etm.c                   | 1752 +++++++++++++++++++
 drivers/coresight/coresight-funnel.c                |  260 +++
 drivers/coresight/coresight-priv.h                  |   48 +
 drivers/coresight/coresight-replicator.c            |  211 +++
 drivers/coresight/coresight-stm.c                   |  819 +++++++++
 drivers/coresight/coresight-tmc.c                   |  794 +++++++++
 drivers/coresight/coresight-tpiu.c                  |  232 +++
 drivers/coresight/coresight.c                       |  681 +++++++
 drivers/coresight/of_coresight.c                    |   99 ++
 include/linux/coresight-stm.h                       |   51 +
 include/linux/coresight.h                           |  167 ++
 include/linux/of_coresight.h                        |   27 +
 20 files changed, 6839 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/coresight.txt
 create mode 100644 arch/arm/include/asm/hardware/cp14.h
 create mode 100644 drivers/coresight/Kconfig
 create mode 100644 drivers/coresight/Makefile
 create mode 100644 drivers/coresight/coresight-etb.c
 create mode 100644 drivers/coresight/coresight-etm-cp14.c
 create mode 100644 drivers/coresight/coresight-etm.c
 create mode 100644 drivers/coresight/coresight-funnel.c
 create mode 100644 drivers/coresight/coresight-priv.h
 create mode 100644 drivers/coresight/coresight-replicator.c
 create mode 100644 drivers/coresight/coresight-stm.c
 create mode 100644 drivers/coresight/coresight-tmc.c
 create mode 100644 drivers/coresight/coresight-tpiu.c
 create mode 100644 drivers/coresight/coresight.c
 create mode 100644 drivers/coresight/of_coresight.c
 create mode 100644 include/linux/coresight-stm.h
 create mode 100644 include/linux/coresight.h
 create mode 100644 include/linux/of_coresight.h