Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

`make` now takes 31s, `make all` takes 1m53s.
The new CheckMisa test ensures that the misa value specified in the
configuration is correct.

The symbols used to query the size of .tdata and .tbss need not be
thread-local themselves; instead, make them linker script-provided
non-thread-local symbols.

* Improve parallellism in debug test Makefile

Now each test is an individual make target, so you can get the most out
of however many cores you have. On my 12-core system, `make` went from
2m45s to 42s, and `make all` went from `3m25s` to `2m39s`.

If you have few cores, this change may actually slow things down a bit,
because ExamineTarget is run for every gdbserver.py invocation.

* Remove test target.

This binary comes from
https://github.com/timsifive/freedom-u540-c000-bootloader/tree/board_setup2,
which will hopefully be accepted upstream.

The impetus for this was mostly that after my Ubuntu upgrade, pylint
suddenly starting to apply python3 rules, and I suppose it's time to
adopt python 3 now that it's been released for more than a decade.

This test checks that an I$ appears to be physically indexed.

* Parse inf/nan floats.

* Enable mstatus.fs in SimpleF18Test

Also accept "unable to fetch" message when FPRs aren't supported.

* Add config files for HiFive Unleashed.

* Add configs to flash HiFive Unleashed.

All tests pass.

The latest OpenOCD doesn't need (nor support) this anymore.

Hopefully this is enough information that I can simply point people who
submit OpenOCD changes to it, and they can run the tests themselves.

Instead of relying on $RISCV.  Using $RISCV was common in the early
days, but nowadays many tools are simply installed alongside the rest of
the system.

* Let the debugger enable mstatus.F if necessary.

* Ignore (some) gdb debug output.

* Increase timeout.

* Make newer version of pylint happy.

* Let the debugger enable mstatus.F if necessary.

* Ignore (some) gdb debug output.

* Increase timeout.

* Make newer version of pylint happy.

* Parse floats the way mainline gdb prints them.

For 64-bit floats, it shows both float and double results. Now more
tests pass using mainline gdb.

* Disable ANSI when talking to gdb.

Helps more tests pass with mainline gdb.

* Parse {float=...,double=...} in "info registers"

Makes tests work better with mainline gdb.

Also work with the new command line options that were renamed in
https://github.com/riscv/riscv-isa-sim/pull/299

Passes on spike and Arty. Won't merge until
https://github.com/riscv/riscv-openocd/pull/364 merges.

This test confirms that in SMP configurations OpenOCD halts the harts
near-simulatenously. (It'll also check for resume, but that's not
implemented yet so commented out for now.)

* WIP

* Use hwthread everywhere.

* Test `-rtos hwthread`.

Also tweak timeouts a bit so that we don't have ridiculous timeouts for
simple operations.

* Tweak timeouts so tests pass on a loaded system.

Add testing of run-test/idle cases.

Fix MemTestBlock

This test used to false pass on 64-bit targets because gdb doesn't like
using Intel hex files on 64-bit targets.

Increase some timeouts in case memory access is slow.

Use more than 1KB for download test.