Want to access single port ram using python in HPS ;

entity pmuga_01 is
	port (
			CLOCK_50 :  in  std_logic;
			AUX_LEDO :  out std_logic;
			DAT_LED  :  out std_logic_vector(3 downto 0);
			LED      :  out std_logic
			);
end entity;
			
architecture Behavioral of pmuga_01 is
 
	signal counter : integer  := 0;
	signal clk_1Hz : std_logic;
	signal aux 		: std_logic;
	
	signal data 	: std_logic_vector(3 downto 0);
	signal addr		: std_logic_vector(7 downto 0);
	signal output  : std_logic_vector(3 downto 0);
	signal wren 	: std_logic;
 
	component pcycle
		port(
				address : in std_logic_vector(7 downto 0);		
				clock   : in std_logic;
				data 	  : in std_logic_vector(3 downto 0);
				wren 	  : in std_logic;
				q 		  : out std_logic_vector(3 downto 0)
		);
	end component;
	
begin
	
		
	ram : pcycle
	PORT MAP (
		address => addr,
		clock => clock_50,
		data => data,
		wren => wren,
		q  => output
	);
	
	process(CLOCK_50) is 
	begin
		if rising_edge(CLOCK_50) then
			if counter < 25000000 then
				counter <= counter + 1;
			else
				clk_1Hz <= not clk_1Hz;
				counter <= 0;
			end if;
		end if;
		
	end process;	
	
	LED <= clk_1Hz;
	AUX <= clk_1Hz; 
	
	process(AUX) is
	begin
		if clk_1Hz = '1' then
			AUX_LEDO <= '0';
			wren <= '1';
			data <= "1111";                        -- data 1111 is stored in addr 00000000
			addr <= "00000000";
			
		
		else
			AUX_LEDO <= '1';
			wren <= '0';
			addr <= "00000000";            
			DAT_LED <= output;
		
	

above VHDL code used to store data in ram which I created using ip integrator...

from mmap import mmap
 
MAPSIZE = 10
offset_mem = 0xFFFF0000
 
with open("/dev/mem", "r+b") as f:
        mem = mmap(f.fileno(), MAPSIZE, offset=offset_mem)
        packed_reg = mem[:]
        print(packed_reg.encode('hex'))
 
 

this python code is used to collect data using python. i get address of on chip memory as 0xFFFF0000 from this link. https://www.intel.com/content/www/us/en/programmable/hps/cyclone-v/hps.html#topic/sfo1410068453374.html

but the output of python doesn't shows the correct data. at positio 0xFFFF0000