Building metal does mtvt CSR operations, and since that's a CLIC thing it's not part of the upstream GCC port. We should just fall back to a register number if possible, but if we're using all the compiler support it might be better to just fall back to CLINT mode.
palmer-dabbelt
commented
5 years ago
Building metal does
mtvtCSR operations, and since that's a CLIC thing it's not part of the upstream GCC port. We should just fall back to a register number if possible, but if we're using all the compiler support it might be better to just fall back to CLINT mode.See https://github.com/riscv/riscv-gnu-toolchain/issues/423 for more details.