Missing storage on quasi contant field

I have a field declared as:

sw=Access.R,    hw=Access.NA,  
reset = 1, # set to 1 on initial power up  
rclr = True, # reset to 0 when fw read it (should remain always 0 after that)  

This not infer storage in generated rtl.
The field is constant (set at 1 from reset value), then the rclr do nothing.