According to RISC-V Debug specification ratified version 0.13 [1]
(also applied to version 1.0 [2] but it has not been ratified yet), the
enabled privilege levels of the trigger is common match conditions for
all the types of the trigger.

This series modularize the code for checking the privilege levels of
type 2/3/6 triggers by implementing functions trigger_common_match()
and trigger_priv_match().

Additional match conditions, such as CSR tcontrol and textra, can be
further implemented into trigger_common_match() in the future.

[1]: https://github.com/riscv/riscv-debug-spec/releases/tag/task_group_vote
[2]: https://github.com/riscv/riscv-debug-spec/releases/tag/1.0.0-rc1-asciidoc

Changes from v5:
- Merge first two commits to avoid build error

Changes from v4:
- Rebasing on riscv-to-apply.next 

Changes from v3:
- Change this series to target Debug Spec. version 0.13

Changes from v2:
- Explicitly mention the targeting version of RISC-V Debug Spec.

Changes from v1:
- Fix typo
- Add commit description for changing behavior of looping the triggers
  when we check type 2 triggers.

Alvin Chang (3):
  target/riscv: Add functions for common matching conditions of trigger
  target/riscv: Apply modularized matching conditions for watchpoint
  target/riscv: Apply modularized matching conditions for icount trigger

 target/riscv/debug.c | 129 ++++++++++++++++++++++++++++---------------
 1 file changed, 85 insertions(+), 44 deletions(-)

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2.34.1