[PATCH v6 0/5] Add support for K230 board

[Chao Liu <chao.liu.zevorn@gmail.com>]

Hi Alistair,

This patch series adds support for U-Boot + OpenSBI + standard Linux kernel on
K230 board. Thanks to Peng Jiang, Mig Yang, Renzao Ren, Yao Zi for their help.

This v6 series has been rebased on Alistair's riscv-to-apply.next branch [1]
and is ready for review.

Test command:

```
$QEMU -M k230 -bios [OpenSBI binary] -m 2G -dtb k230_canmv.dtb -kernel [img]
```

PATCH v6 changelog:
- Rebased on the latest Alistair's riscv-to-apply.next branch.
- Patch 4: Picked up Fabiano's Acked-by.

PATCH v5 changelog:
- Rebased on Alistair's riscv-to-apply.next branch.
- Patch 2: Fixed reset vector ROM jump to trap-handler bug.
  https://lore.kernel.org/qemu-devel/cover.1769757064.git.chao.liu.zevorn@gmail.com/

PATCH v4 changelog:
- Rebased on the latest master branch.
- No functional changes from v3.

PATCH v3 changelog:
- Patch 1: Align T-Head C908 CPU's RISC-V extension with XUANTIE-QEMU.
- Patch 2: Adjust PLIC and CLINT addresses to match K230 datasheet.

PATCH v2 changelog:
- Patch 1: Add Svpbmt extension support for the T-Head C908 CPU.
- Patch 2: Move the k230.rst definition from MAINTAINERS to Patch 5.
- Patch 5: Apply Daniel's bugfix to build the k230 documentation successfully.

PATCH v1 changelog:
- Patch1: Add T-Head C908 and C908v CPU support.
- Patch2: Add K230 board initial support(big core is not supported yet).
- Patch3: Add Programmable Watchdog Timer (WDT) peripheral support.
- Patch4: Add QEMU test for K230 watchdog.
- Patch5: Add documentation for K230 machine.

[1] https://github.com/alistair23/qemu/tree/riscv-to-apply.next

Thanks,
Chao

Chao Liu (5):
  target/riscv: add thead-c908 cpu support
  hw/riscv: add k230 board initial support
  hw/watchdog: add k230 watchdog initial support
  tests/qtest: add test for K230 watchdog
  docs/system/riscv: add documentation for k230 machine

 MAINTAINERS                    |  12 +-
 docs/system/riscv/k230.rst     |  48 ++++
 docs/system/target-riscv.rst   |   1 +
 hw/riscv/Kconfig               |  11 +
 hw/riscv/k230.c                | 502 +++++++++++++++++++++++++++++++++
 hw/riscv/meson.build           |   2 +-
 hw/watchdog/Kconfig            |   4 +
 hw/watchdog/k230_wdt.c         | 307 ++++++++++++++++++++
 hw/watchdog/meson.build        |   1 +
 hw/watchdog/trace-events       |   9 +
 include/hw/riscv/k230.h        | 154 ++++++++++
 include/hw/watchdog/k230_wdt.h | 132 +++++++++
 target/riscv/cpu-qom.h         |   2 +
 target/riscv/cpu.c             |  51 ++++
 target/riscv/th_csr.c          | 380 ++++++++++++++++++++++++-
 tests/qtest/k230-wdt-test.c    | 199 +++++++++++++
 tests/qtest/meson.build        |   3 +-
 17 files changed, 1814 insertions(+), 4 deletions(-)
 create mode 100644 docs/system/riscv/k230.rst
 create mode 100644 hw/riscv/k230.c
 create mode 100644 hw/watchdog/k230_wdt.c
 create mode 100644 include/hw/riscv/k230.h
 create mode 100644 include/hw/watchdog/k230_wdt.h
 create mode 100644 tests/qtest/k230-wdt-test.c

-- 
2.53.0