What should I use here - Need changing value in different processes

 -- for guidance
signal counter : unsigned(2 downto 0) := "000";
signal count : integer range 0 to ... := 0;
...
process(stepper_clk_in)
begin
if rising_edge(stepper_clk_in) then
    counter <= counter+1;   -- 0 ~ 7
end if;
end process;
clk_12 <= std_logic(counter(0));
clk_6   <= std_logic(counter(1));
clk_3   <= std_logic(counter(2));
process(stepper_in_clk)
begin
if rising_edge(stepper_in_clk) then
     if clk_12 = '1' then
         if count = ? then
             count <= ?;
        elsif direction_i = '0' and run_i = '1' and halt_ctrl = '0' then
             count <= 0;
        else
             count <= count + 1; 
       end if;
     end if;
end if;
end process;