* Assisted in design and debug by Joel Sherrill <joel@OARcorp.com>.
* mongoosev/duart/mg5uart.c, mongoosev/duart/mg5uart.h,
mongoosev/include/mongoose-v.h, mongoosev/vectorisrs/vectorisrs.c,
shared/interrupts/maxvectors.c: Now works. Significant rework
of exceptions and interrupt vectoring to clean things up.
* shared/interrupts/vectorexceptions.c: Removed.
* shared/interrupts/Makefile.am: Reflects above.
* configure.in: Added new directories.
* shared/interrupts/Makefile.am: Added AM_CPPFLAGS to define TX39
when compiling for a TX3904.
* shared/interrupts/maxvectors.c: Corrected conditional logic.
* tx39/Makefile.am: Added vectorisrs.
* tx39/vectorisrs/Makefile.am, tx39/vectorisrs/vectorisrs.c,
* tx39/vectorisrs/.cvsignore: New files. This decodes the
interrupt pending information on the TX3904 and vectors
an interrupt.
* shared/.cvsignore, shared/Makefile.am,
shared/cache/.cvsignore, shared/cache/Makefile.am,
shared/cache/cache.c, shared/cache/cache_.h,
shared/interrupts/.cvsignore, shared/interrupts/Makefile.am,
shared/interrupts/installisrentries.c,
shared/interrupts/isr_entries.S,
shared/interrupts/maxvectors.c, tx39/.cvsignore,
tx39/Makefile.am, tx39/include/.cvsignore,
tx39/include/Makefile.am, tx39/include/tx3904.h: New file.
Moved some pieces of interrupt processing from score/cpu to
libcpu/mips since many interrupt servicing characteristics are
CPU model dependent. This patch addresses the number of interrupt
sources and where the ISR prologues are located. The only way to
currently install the ISR prologues requires that the prologues
be installed into RAM.
