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fnob.sv
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fnob.sv
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//###################################################################################
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
// The following information is considered proprietary and confidential to Facebook,
// and may not be disclosed to any third party nor be used for any purpose other
// than to full fill service obligations to Facebook
//###################################################################################
`ifndef __FNOB_SV__
`define __FNOB_SV__
//================================================================================
class fnob#(type T=bit[63:0]) extends uvm_object;
//`uvm_object_param_utils(fnob#(T))
fnob_rand#(T) m_fnob_rand;
string m_fnob_name, m_fnob_rand_name;
local bit m_is_set;
//--------------------------------------------------------------------------------
function new(string name="", FNOB_TYPE fnob_type, T params[string][$], bit no_name_chk=0);
super.new(name);
m_fnob_name = name;
m_fnob_rand_name = $psprintf("%s_rand", m_fnob_name);
m_fnob_rand = fnob_common#(T)::param_2_rand(m_fnob_rand_name, fnob_type, params);
m_is_set = 0;
`uvm_info(get_name(), $psprintf("new %s", m_fnob_name), UVM_NONE)
if(!no_name_chk) fnob_common#(T)::fnob_name_add(m_fnob_name);
// check if initial cfgdb override
cfgdb_override(m_fnob_name, m_fnob_rand_name, m_fnob_rand);
fork begin
// check if future cfgdb override, supports multiple override
wait_cfgdb_override(m_fnob_name, m_fnob_rand_name, m_fnob_rand);
end join_none
endfunction // new
//--------------------------------------------------------------------------------
static function fnob#(T) new_multi(string name="", string s);
fnob_rand#(T) fnob_rand;
string fnob_name, fnob_rand_name;
new_multi = new(name, FNOB_MULTI, '{"val":'{}});
new_multi.m_fnob_rand = fnob_rand_multi#(T)::init(fnob_rand_name, s);
endfunction
//--------------------------------------------------------------------------------
function T gen();
//gen contains a construct not
//supported in constraint functions: driving a non-local variable 'm_gen_val'
//m_gen_val = m_fnob_rand.gen();
//return m_gen_val;
return m_fnob_rand.gen();
endfunction // gen
//--------------------------------------------------------------------------------
function T val();
return m_fnob_rand.m_fnob_gen;
endfunction // gen
//--------------------------------------------------------------------------------
function bit is_set();
return m_is_set;
endfunction // gen
//--------------------------------------------------------------------------------
function void cfgdb_override(string fnob_name,
string fnob_rand_name,
ref fnob_rand#(T) frand);
string s, s_no_multi;
T params[string][$];
FNOB_TYPE fnob_type;
if (uvm_config_db#(string)::get(null, "", fnob_name, s)) begin
`uvm_info(get_name(), $psprintf("cfg_db override %s", fnob_name), UVM_MEDIUM)
fnob_common#(T)::s_2_param(s, fnob_type, params);
if (fnob_type == FNOB_MULTI) begin
fnob_common#(T)::remove_space_in_str(s);
s_no_multi = s.substr(6, (s.len()-1)); // exclude multi:
`uvm_info(get_name(), $psprintf("multi_fnob str s=%s s_no_multi=%s", s, s_no_multi), UVM_MEDIUM)
frand = fnob_rand_multi#(T)::init(fnob_rand_name, s_no_multi);
end
else begin
frand = fnob_common#(T)::param_2_rand(fnob_rand_name, fnob_type, params);
end // else: !if(fnob_type == FNOB_MULTI)
m_is_set = 1;
end
endfunction // cfgdb_override
//--------------------------------------------------------------------------------
task wait_cfgdb_override(string fnob_name,
string fnob_rand_name,
ref fnob_rand#(T) frand);
forever begin
uvm_config_db#(string)::wait_modified(null, "", fnob_name);
cfgdb_override(fnob_name, fnob_rand_name, frand);
end
endtask // wait_cfgdb_override
endclass
`endif