Evgeniy Naydanov

How to reset the DM on the first connection on both 0.13 and 1.0 spec versions

6

* Assume an external debugger (ED) is connecting to a hart for the first time. * ED wants to reset the DM in order to get it into a predictable...

Hit bit interaction with action conflict when several triggers of the same priority match

3

From [5.3. Priority]: > When multiple triggers in the same priority fire at once, ... If one of these triggers has the "enter Debug Mode" action (1) and another trigger...

Related to #1011

It is covered by > Whether data store triggers match on AMOs is UNSPECIFIED.

Stored value availability to TM in case of AMOs

6

[5.5.1. A Extension] states: > 5. Each AMO instruction is a store for the write portion of the operation. The address is always available to trigger on, although the value...

Timing requirements for a chain of `mcontrol` load address triggers

2

[5.7.11. Match Control (mcontrol, at 0x7a1)] states: > A chain of triggers that don’t all have the same timing value will never fire. That means to implement the suggestions in...

`maskmax6` discovery may need clarification

2

The specification describes the following algorithm (referenced bellow as algorithm (1)) to discover the value of `maskmax6`: > The value of maskmax6 can be determined by the debugger via the...

With the clarification, it's obvious that the DM can be reset without knowing the `hartsel`. Fixes #1021

* Register file examination is separated. * Allow to access registers through cache as early as possible to re-use general register access interface and propely track state of the register....