This change cleans up warnings issued when compiled with
-Wall.
- Removed unused functions and variables.
- Moved static declarations out of headers and into source files
- Added braces around initialization where suggested.
- Add "SHOW STACK" support to CPU
- An off-by-one error in checking SDT length was fixed.
- not-present co-processor R/W should not set Bus timeout bit
Two critical issues are fixed with this commit:
1. The MMU cache was being corrupted by writing the 'Last Used'
bit into the wrong half of the PD cache (low word vs. high word)
2. The MMU cache was being too aggressively flushed on SRAMA
write, because the wrong length was being used. In addition,
the code was walking off the end of the cache array when
flushing any section other than section 0, potentially causing
memory corruption.
