The installed header files from the riscv subproject were incomplete, since
processor.h includes debug_rom_defines.h, and the latter was not installed.
Fix by moving it into riscv/, add it to the riscv subproject header list, which
ensures it will get installed. While here, also add a missed dependency of debug_rom
on riscv/encoding.h to debug_rom/Makefile.
This should replace the ROM hack I implemented earlier, but for now both
exist together.
Back to the point where gdb connects, core jumps to ROM->RAM->ROM.
I'm not thrilled about including a static copy in so many cc files, and
making the compiler throw it out. But without really grokking the
Makefile this is the best it's going to be.
Connect with gdb, and the core will jump to Debug ROM and start
executing it. Then it crashes when it jumps to 0x400 because Debug RAM
isn't implemented (and doesn't live there anyway, for now).
Tim Newsome
Prashanth Mundkur
Megan Wachs
Andrew Waterman