diff options
Diffstat (limited to 'target/riscv/op_helper.c')
| -rw-r--r-- | target/riscv/op_helper.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c index 3512462..af0c52a 100644 --- a/target/riscv/op_helper.c +++ b/target/riscv/op_helper.c @@ -287,11 +287,12 @@ void csr_write_helper(CPURISCVState *env, target_ulong val_to_write, env->sepc = val_to_write; break; case CSR_STVEC: - if (val_to_write & 1) { + /* bits [1:0] encode mode; 0 = direct, 1 = vectored, 2 >= reserved */ + if ((val_to_write & 3) == 0) { + env->stvec = val_to_write >> 2 << 2; + } else { qemu_log_mask(LOG_UNIMP, "CSR_STVEC: vectored traps not supported"); - goto do_illegal; } - env->stvec = val_to_write >> 2 << 2; break; case CSR_SCOUNTEREN: if (env->priv_ver >= PRIV_VERSION_1_10_0) { @@ -313,11 +314,12 @@ void csr_write_helper(CPURISCVState *env, target_ulong val_to_write, env->mepc = val_to_write; break; case CSR_MTVEC: - if (val_to_write & 1) { + /* bits [1:0] indicate mode; 0 = direct, 1 = vectored, 2 >= reserved */ + if ((val_to_write & 3) == 0) { + env->mtvec = val_to_write >> 2 << 2; + } else { qemu_log_mask(LOG_UNIMP, "CSR_MTVEC: vectored traps not supported"); - goto do_illegal; } - env->mtvec = val_to_write >> 2 << 2; break; case CSR_MCOUNTEREN: if (env->priv_ver >= PRIV_VERSION_1_10_0) { |