diff options
-rw-r--r-- | riscv/htif.cc | 5 | ||||
-rw-r--r-- | riscv/htif.h | 1 | ||||
-rw-r--r-- | riscv/sim.cc | 1 |
3 files changed, 7 insertions, 0 deletions
diff --git a/riscv/htif.cc b/riscv/htif.cc index 02809d0..3bb8b99 100644 --- a/riscv/htif.cc +++ b/riscv/htif.cc @@ -51,6 +51,11 @@ void htif_t::wait_for_start() while(wait_for_packet() != APP_CMD_START); } +void htif_t::wait_for_tohost_write() +{ + while(wait_for_packet() != APP_CMD_READ_CONTROL_REG); +} + void htif_t::wait_for_fromhost_write() { while(wait_for_packet() != APP_CMD_WRITE_CONTROL_REG); diff --git a/riscv/htif.h b/riscv/htif.h index 0106695..d7a8c89 100644 --- a/riscv/htif.h +++ b/riscv/htif.h @@ -19,6 +19,7 @@ public: // we block on the host if the target machine reads the fromhost register, // which provides determinism in tohost/fromhost communication. + void wait_for_tohost_write(); void wait_for_fromhost_write(); private: diff --git a/riscv/sim.cc b/riscv/sim.cc index 65125e4..9020da4 100644 --- a/riscv/sim.cc +++ b/riscv/sim.cc @@ -58,6 +58,7 @@ void sim_t::set_tohost(reg_t val) { fromhost = 0; tohost = val; + htif->wait_for_tohost_write(); } reg_t sim_t::get_fromhost() |