Instruction cache setup
Fix icache issues
Still work on sram/icache
tests for new cache
fix icache issues
fix icache issues - new faster version
Working ICACHE version
Working ICACHE version (missing files)
Disable debug
Small fixes for papilio plus
cache: some refactor to fix some issues
Work for new SDRAM
pty: change serial print
sdram: optimizations
core: skip trace on synthesis
cache improvements
plus: reenable sigmadelta
Work in progress: support SDRAM and DDR
working s3e starter with DDR
s3e: add new variant