misa.S indicates the machine supports S mode, and hence implements the s*CSRs, either returning the required values, or hard-coded to zero as specified.
However, if S-mode is not implemented, s* CSR accesses should generate illegal instruction traps.
misa.S indicates the machine supports S mode, and hence implements the s*CSRs, either returning the required values, or hard-coded to zero as specified.
However, if S-mode is not implemented, s* CSR accesses should generate illegal instruction traps.