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| author | Abhinay Kayastha <abhinay.kayastha@sifive.com> | 2020-07-06 17:02:05 -0700 |
|---|---|---|
| committer | Abhinay Kayastha <abhinay.kayastha@sifive.com> | 2020-07-06 17:02:05 -0700 |
| commit | 85b7e37d013ef2f1a505ffc00d142f26dcf81d80 (patch) | |
| tree | dea16a5418f8faf22b2b6491b3dcd69216c9a5b0 | |
| parent | 4ae887c1ffd54f9e33461bbe6774693eb41267a0 (diff) | |
| download | spike-85b7e37d013ef2f1a505ffc00d142f26dcf81d80.zip spike-85b7e37d013ef2f1a505ffc00d142f26dcf81d80.tar.gz spike-85b7e37d013ef2f1a505ffc00d142f26dcf81d80.tar.bz2 | |
If n_pmp=0, then pmp is not implemented hence raise trap
| -rw-r--r-- | riscv/processor.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/riscv/processor.cc b/riscv/processor.cc index d6348a8..9dc5911 100644 --- a/riscv/processor.cc +++ b/riscv/processor.cc @@ -1047,6 +1047,9 @@ reg_t processor_t::get_csr(int which) return 0; if (which >= CSR_PMPADDR0 && which < CSR_PMPADDR0 + state.max_pmp) { + // If n_pmp is zero, that means pmp is not implemented hence raise trap if it tries to access the csr + if (n_pmp == 0) + throw trap_illegal_instruction(0); reg_t i = which - CSR_PMPADDR0; if ((state.pmpcfg[i] & PMP_A) >= PMP_NAPOT) return state.pmpaddr[i] | (~pmp_tor_mask() >> 1); |