[RFC PATCH 0/5] RISC-V:support Nuclei FPGA Evaluation Kit

[wangjunqiang <wangjunqiang@iscas.ac.cn>]

This patch series provides an implementation of Nuclei FPGA Machine[1].
At present, only MCU mode support is included. In mcu mode, We will
use eclic[2] as interrupt controller. It is compatible with clic
in Machine mode. But It contains some customized csr[3] that will
take up part of the csr code. If there is any question, please
let me know.

Features:
1.Add Nuclei CSR support in eclic mode
2.Add ECLIC Device
3.Add Systimer Device
4.Add Uart Device
5.Add Nuclei FPGA Machine

It have passed Nuclei SDK[4](not include dsp) and RTThread[5] HBird BSP
Test.

Any comments are welcome.Thanks

wangjunqiang

[1] https://doc.nucleisys.com/nuclei_sdk/design/board/nuclei_fpga_eval.html
[2] https://doc.nucleisys.com/nuclei_spec/isa/eclic.html
[3] https://doc.nucleisys.com/nuclei_spec/isa/core_csr.html
[4] https://github.com/Nuclei-Software/nuclei-sdk.git
[5] https://github.com/RT-Thread/rt-thread

wangjunqiang (5):
  target/riscv: Add Nuclei CSR and Update interrupt handling
  hw/intc: Add Nuclei ECLIC device
  hw/intc: Add Nuclei Systimer
  hw/char: Add Nuclei Uart
  Nuclei FPGA Evaluation Kit MCU Machine

 default-configs/devices/riscv32-softmmu.mak |   1 +
 default-configs/devices/riscv64-softmmu.mak |   1 +
 hw/char/Kconfig                             |   3 +
 hw/char/meson.build                         |   1 +
 hw/char/nuclei_uart.c                       | 208 ++++++++++
 hw/intc/Kconfig                             |   6 +
 hw/intc/meson.build                         |   2 +
 hw/intc/nuclei_eclic.c                      | 437 ++++++++++++++++++++
 hw/intc/nuclei_systimer.c                   | 254 ++++++++++++
 hw/riscv/Kconfig                            |   9 +
 hw/riscv/meson.build                        |   1 +
 hw/riscv/nuclei_n.c                         | 276 +++++++++++++
 include/hw/char/nuclei_uart.h               |  73 ++++
 include/hw/intc/nuclei_eclic.h              | 115 ++++++
 include/hw/intc/nuclei_systimer.h           |  70 ++++
 include/hw/riscv/nuclei_n.h                 | 136 ++++++
 target/riscv/cpu.c                          |  25 +-
 target/riscv/cpu.h                          |  42 +-
 target/riscv/cpu_bits.h                     |  37 ++
 target/riscv/cpu_helper.c                   |  80 +++-
 target/riscv/csr.c                          | 347 +++++++++++++++-
 target/riscv/insn_trans/trans_rvi.c.inc     |  16 +-
 target/riscv/op_helper.c                    |  14 +
 23 files changed, 2145 insertions(+), 9 deletions(-)
 create mode 100644 hw/char/nuclei_uart.c
 create mode 100644 hw/intc/nuclei_eclic.c
 create mode 100644 hw/intc/nuclei_systimer.c
 create mode 100644 hw/riscv/nuclei_n.c
 create mode 100644 include/hw/char/nuclei_uart.h
 create mode 100644 include/hw/intc/nuclei_eclic.h
 create mode 100644 include/hw/intc/nuclei_systimer.h
 create mode 100644 include/hw/riscv/nuclei_n.h

-- 
2.17.1