Registers - Losing bus error status when auto_predict is on

[achandra]

Hi,

When i get an error response from the bus, i update the rw.status to UVM_NOT_OK. The do_bus_write task in uvm_reg_map properly displays that the status is registered as NOT_OK. However, final status returned from read/write seems to be always IS_OK.

I checked the uvm_reg code and see that :

if (system_map.get_auto_predict()) begin

if (rw.status != UVM_NOT_OK) begin

sample(value, -1, 0, rw.map);

m_parent.XsampleX(map_info.offset, 0, rw.map);

end

do_predict(rw, UVM_PREDICT_WRITE);

end

And do_predict seems to be changing status to IS_OK always. I have enabled auto_predict using set_auto_predict(1).

function void uvm_reg::do_predict(uvm_reg_item rw,

uvm_predict_e kind = UVM_PREDICT_DIRECT,

uvm_reg_byte_en_t be = -1);

uvm_reg_data_t reg_value = rw.value[0];

m_fname = rw.fname;

m_lineno = rw.lineno;

rw.status = UVM_IS_OK;

Can someone suggest what is wrong here? Any suggestions ...

Regards,

Ashok

[petermonsson]

Hi,

I believe this to be a bug: http://www.eda.org/svdb/view.php?id=4297

Best Regards

Peter