chisel: Change pattern for reset values.
Merge branch 'master' into exceptions
chisel: First prototype implementation of exception/interrupt handling.
chisel: Add file for actual exception handling unit.
chisel: First version of traps.
chisel: Generalize exception handling.
chisel: Use buttons/keys as external interrupt sources.
test: Add test program for exceptions/interrupts.
Merge branch 'master' into exceptions
chisel: Add illegal operation exception.
doc: Update documentation for exceptions/interrupts.
Merge branch 'master' into exceptions
chisel: Ignore unsupported stack control operations.
chisel: Add missing file for keys device.
chisel: Writes to the pending flags clear bits but do not set them.
simulator: Make interrupt instruction enter debugging and profiling frames.
Cleanup of binary loading, added check tool.

* Cleanup ELF and binary loading, make padasm handle ELF
* Added pacheck tool to statically check for common errors in the binary
* Fixed delay slot handling for interrupts
pasim: Fix reading from redirected UART
pasim: use s10 to store function offset at interrupt, store function base instead of PC in s9
Merge branch 'master' into isarev_m23