Quasar RISC-V Core 2.0 from Lampro Mellon

Release Notes

Multiple debug module compliance deviations and bugs reported by Codasip
Updates to debug module to level compliance to version 0.13.2 of debug spec
Trigger chaining compliance fixes
Power optimization improvements and clock gating improvements
- Significantly lower power in sleep as well as normal operation.
Enhanced debug memory abstract command to access internal as well as external memories
Added bit-manipulation support for Zba, Zbb, Zbc, Zbe, Zbf, Zbp, Zbr, Zbs (Jan 29, 2020 Draft spec).
- Zbs and Zbb are enabled by default. Use -set=bitmanip+zb*=1 to enable other sub-extensions.
Enhancements and additional configurations options for a faster divider
JTAG controller intial state issue fixed
Branch predictor fully-associative mode for 8,16,32 entries.
Corner case bugs fixes related to
- Bus protocol corner cases (ahb)
- Fetch bus error recording improved accuracy
- Branch predictor pathological timing cases fixes
- Fast interrupt with DCCM ECC errors priority bug
- MPC & PMU protocol cleanup
- Performance counter bug fixes (counting branch prediction events)
- Triggers and ECC correctable error overflows bug fixes
Demo test-bench updates
- Handling bigger test sizes using associative arrays in external memory slaves,
- simplified test building process and CCM loading functions (only program.hex is generated, no data.hex)
- Improved Makefile and example tests (see README)
- Generating crt0 and link.ld from quasar.config

Initial release