Release notes

1.4

Upgraded bit-manipulation support for Zba, Zbb, Zbc, Zbe, Zbf, Zbp, Zbr, Zbs to 0.94 draft spec.
- Zba, Zbb, Zbc and Zbs are enabled by default. Use -set=bitmanip_zb*=1 to enable other sub-extensions.
Simulation performance improvement coding style changes in branch predictor and PIC
Several corner case and exotic bug fixes :
- MPC run ack timing
- Force halt mechanism and MPC
- Store data collision with DCCM DMA error when address is 0x0
- RAW hazard on mtdata1
- Errors on DMA access could leak into Dbg abstract cmd ocurring at same time
- Icache parity error and branch error collision leading to fwd progress issue
Fixed linter warning for async reset

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 bypass register intial state issue fixed
New branch predictor fully-associative option with 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 link.ld with veer.config

Several bug fixes in debug module
- Added new dbg_rst_l input for system wide reset to debug module. If debug module operation during core reset is not needed, this can be connected to rst_l.
Trace port width adjusted
Demo testbench has a synthesizable bridge to allow accessing the ICCM with load/stores via the DMA port. (This only works with the AXI4 build)

Initial release