Hello,
I’m working on the project to make tape-out with freedom U500 model in
GitHub - sifive/freedom: Source files for SiFive's Freedom platforms.
For test and verification, I’m going to use VCU118 board.
To do so, I need to
- Replace the BootROM in the model with RAM which can be accessed by out of chip with communication module(UART).
- Replace the cache block with SRAM which supported by the fab company.
For #1,
when I follow the instruction in the github with the command,
$make MODEL=VC707BaseShell -f Makefile.vcu118-u500devkit verilog
$make MODEL=VC707BaseShell -f Makefile.vcu118-u500devkit mcs
I understand the simply workflow of generating mcs file (scala files → .fir ->verilog ->.mcs)
I’m trying to replace the BootROM by modifying sifive.freedom.unleashed.DevKitU500FPGADesign_WithDevKit100MHz.v file.
But I’m pretty sure that other works are needed to change I/O pin configuration for UART to connect my computer to BootROM. What other files should I change?
For #2,
when I check the icache and dcache in sifive.freedom.unleashed.DevKitU500FPGADesign_WithDevKit100MHz.v file,
these are not in the form of memory interface that i expected(such as modules with addr, data, cen, wen …)
So I cannot simple replace it with SRAM. In the scala file or .fir file, is there any option that I can generate verilog file with cache which is in memory interface?
Any advice will be very helpful for me!
plz reply!
thank you.