[PATCH 0/5] target/riscv: Initial support for native debug feature via M-mode CSRs

[Bin Meng <bmeng.cn@gmail.com>]

This adds initial support for the native debug via the Trigger Module,
as defined in the RISC-V Debug Specification [1].

Only "Address / Data Match" trigger (type 2) is implemented as of now,
which is mainly used for hardware breakpoint and watchpoint. The number
of type 2 triggers implemented is 2, which is the number that we can
find in the SiFive U54/U74 cores.

[1] https://github.com/riscv/riscv-debug-spec/raw/master/riscv-debug-stable.pdf


Bin Meng (5):
  target/riscv: Add initial support for native debug
  target/riscv: debug: Implement debug related TCGCPUOps
  target/riscv: Add a config option for native debug
  target/riscv: csr: Hook debug CSR read/write
  hw/core: tcg-cpu-ops.h: Update comments of debug_check_watchpoint()

 include/hw/core/tcg-cpu-ops.h |   1 +
 target/riscv/cpu.h            |   7 +
 target/riscv/debug.h          | 114 +++++++++
 target/riscv/cpu.c            |  14 ++
 target/riscv/csr.c            |  57 +++++
 target/riscv/debug.c          | 439 ++++++++++++++++++++++++++++++++++
 target/riscv/meson.build      |   1 +
 7 files changed, 633 insertions(+)
 create mode 100644 target/riscv/debug.h
 create mode 100644 target/riscv/debug.c

-- 
2.25.1