* shared/interrupts/installisrentries.c: Added support for debug
exception vector.
* shared/interrupts/isr_entries.S: Added support for debug exception
vector.
* isr_entries.S: Removed comment incorrectly indicating this
file was cpu_asm.S.
* vectorexceptions.c (mips_dump_exception_frame): New routine
broken out from default exception handler.
* 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.
