Mark3 RTOS Source

Quick modification to prevent loss of timer ticks at the beginning of the tickless timer loop. (MSP430)

- Fixed problems in MSP430 port. Apparent memory corruptions were due to incorrect stack calculation macro which resulted in threads having misaligned stack pointers. Since MSP430 discards the LSB of the SP, this causes "bad things (tm)" to happen.

- More work on MSP430.
- Fixed a bug causing half the thread stack to be left uninitialized.
- Added preliminary code to support tickless timers.
- Fixed critical-section logic

However, there are still some major problems on the port...
- There appears to be memory corruptions or compiler bugs impacting the timer code.

Fixing IdleFunc for MSP430 port.

Fix MSP430 tick-based timers. Basic sanity achieved on MSP430f2274, with caveats.
-- RH/TI GCC port works, but community mspgcc doesn't. Need to investigate.
-- Tickless timers need porting.

Fixing context switch code for MSP430.

- Changes to get the MSP430 build working on GCC under linux.

Adding initial MSP430 port code

-- Missed some new controls. Adding those here.

-Forgot to add refactored/moved unit_test support