gateware/soc: modify vexriscv configuration, reduce fw size

apfelaudio / tiliqua

A powerful, hackable FPGA-based audio multitool for Eurorack.

CERN Open Hardware Licence Version 2 - Strongly Reciprocal

59 stars 4 forks source link

Closed vk2seb closed 2 months ago

vk2seb commented 2 months ago

fix vexriscv sbt build scripts so its easier to modify in-place
modify vexriscv configuration to remove icache, not necessary for any example bitstreams.
reduce firmware bloat with cargo flags, and reduce sram size from 64K to 32K.
remove pre_main for now as it seems to break under LTO. interestingly it doesn't seem to be necessary. maybe because icache is gone.