[PATCH v2 0/9] powerpc: Add support for Microwatt soft-core

[Paul Mackerras]

This series of patches adds support for the Microwatt soft-core.
Microwatt is an open-source 64-bit Power ISA processor written in VHDL
which targets medium-sized FPGAs such as the Xilinx Artix-7 or the
Lattice ECP5.  Microwatt currently implements the scalar fixed plus
floating-point subset of Power ISA v3.0B plus the radix MMU, but not
logical partitioning (i.e. it does not have hypervisor mode or nested
radix translation).

Changes in v2:

- Dropped the patch that adds support for the PRTBL register, since it
  is not architected.  Instead, I have added support for a 1-entry
  partition table to Microwatt and implemented the PTCR register.

- Updated the device tree.

- Dropped the change to archrandom.h.

- Combined patches 10 and 11 of the previous series into one.

Paul.

 arch/powerpc/Kconfig                      |   2 +-
 arch/powerpc/boot/Makefile                |   4 +
 arch/powerpc/boot/devtree.c               |  59 ++++---
 arch/powerpc/boot/dts/microwatt.dts       | 138 ++++++++++++++++
 arch/powerpc/boot/microwatt.c             |  24 +++
 arch/powerpc/boot/ns16550.c               |   9 +-
 arch/powerpc/boot/wrapper                 |   5 +
 arch/powerpc/configs/microwatt_defconfig  |  98 ++++++++++++
 arch/powerpc/kernel/udbg_16550.c          |  39 +++++
 arch/powerpc/platforms/Kconfig            |   1 +
 arch/powerpc/platforms/Makefile           |   1 +
 arch/powerpc/platforms/microwatt/Kconfig  |  13 ++
 arch/powerpc/platforms/microwatt/Makefile |   1 +
 arch/powerpc/platforms/microwatt/rng.c    |  48 ++++++
 arch/powerpc/platforms/microwatt/setup.c  |  41 +++++
 arch/powerpc/sysdev/xics/Kconfig          |   3 +
 arch/powerpc/sysdev/xics/Makefile         |   1 +
 arch/powerpc/sysdev/xics/ics-native.c     | 257 ++++++++++++++++++++++++++++++
 arch/powerpc/sysdev/xics/xics-common.c    |   2 +
 19 files changed, 718 insertions(+), 28 deletions(-)