This is used to make sure that OpenOCD can work on targets that don't
support abstract access to CSR registers. It replaces a simpler hack,
which caused #266.
* Implement hasel/hawindow support.
This should allow simultaneous resume and halt to work.
* Fix anyrunning/anyhalted bits.
* Add --without-hasel argument for testing.
* Make halt/resume times more equal.
Switching threads after every instruction executed in debug mode leads
to a lot of extra instructions being executed on the "other" thread when
both are really supposed to halt/resume near-simultaneously. Fixed that
by adding wfi to debug_rom.S, and implementing it to switch to the other
hart as well as check for JTAG input.
When resuming, write the hart ID to the debug ROM so that the DM knows
which hart actually resumed. (Before simultaneous resume it just assumed
the current one.)
Also got rid of resume symbol in debug_rom.S since it had no purpose.
* Preserve Debug ROM entry points.
* Make sure minstret is correct when wfi happens.
Several people have raised the concern that dynamically linking the
built-in components of Spike causes more headaches than it's worth.
IIRC, the only reason we did this is to better support the
`--extension=libfoo.so` feature.
The spec says that e.g. MEI takes priority over SEI. We got this right in
the common case that SEI is delegated to S-mode, but we reversed it in the
undelegated case.
The destination privilege was correct, so this wasn't much of a problem,
but it is technically noncompliant.
Resolves#288
* Update debug_defines from latest spec.
* Implement halt groups.
This lets the debugger halt multiple harts near simultaneously.
* Revert encoding, which I updated accidentally.
PMP checks should unconditionally fail if the PMP matches part of, but
not all of, an access. We got this right, but went too far: we checked
whether _any_ PMP matches in this manner. In fact, only the first PMP
that maches any of the bytes should be checked in this manner.
* Add "--log-cache-miss" option to generate a log of cache miss.
- This option must be used with "--ic" and/or "--dc" options
to enable cache simulation.
- This option is useful with "-l" option to understand
which instruction has caused the cache miss.
* Modify log format of cache miss to reduce log size.
Scott Beamer
Andrew Waterman
Tim Newsome
Andrew Waterman
nmeum
Luís Marques
Dinesh Thirumurthy
Dinesh Thirumurthy
naufal
Palmer Dabbelt
Hesham Almatary
takeoverjp