[PATCH RFC 0/5] hw/riscv: Add support for Milk-V Duo board

[Kuan-Wei Chiu <visitorckw@gmail.com>]

Add initial support for the Milk-V Duo board.

This is something I've been playing around with in my local branch, and
I've reached a point where the implementation is enough to boot OpenSBI
and reach a Linux shell using an SD card image.

I am sending this as an RFC to get early feedback to understand the gap
between this minimal implementation and what is required for a upstream
merge. I plan to continue implementing missing blocks (like gpio and
clk/rst) in future.

Kuan-Wei Chiu (5):
  target/riscv: Add stubs for T-Head PMU CSRs
  hw/char: Add dw8250 UART
  hw/misc: Add Sophgo CV1800B clock controller
  hw/riscv: Add Sophgo CV1800B SoC support
  hw/riscv: Add Milk-V Duo board support

 MAINTAINERS                                 |  11 ++
 configs/devices/riscv64-softmmu/default.mak |   1 +
 hw/char/Kconfig                             |   4 +
 hw/char/dw8250.c                            | 118 ++++++++++++++
 hw/char/meson.build                         |   1 +
 hw/misc/Kconfig                             |   3 +
 hw/misc/cv1800b_clk.c                       |  89 +++++++++++
 hw/misc/meson.build                         |   1 +
 hw/riscv/Kconfig                            |  14 ++
 hw/riscv/cv1800b.c                          | 168 ++++++++++++++++++++
 hw/riscv/meson.build                        |   3 +
 hw/riscv/milkv_duo.c                        | 122 ++++++++++++++
 include/hw/char/dw8250.h                    |  27 ++++
 include/hw/misc/cv1800b_clk.h               |  24 +++
 include/hw/riscv/cv1800b.h                  |  52 ++++++
 target/riscv/th_csr.c                       |  30 ++++
 16 files changed, 668 insertions(+)
 create mode 100644 hw/char/dw8250.c
 create mode 100644 hw/misc/cv1800b_clk.c
 create mode 100644 hw/riscv/cv1800b.c
 create mode 100644 hw/riscv/milkv_duo.c
 create mode 100644 include/hw/char/dw8250.h
 create mode 100644 include/hw/misc/cv1800b_clk.h
 create mode 100644 include/hw/riscv/cv1800b.h

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2.54.0.563.g4f69b47b94-goog