+
+ data_addr <= (others => '0');
+ dmem_we <= '0';
+
+ if (wb_reg.address(DATA_ADDR_WIDTH+2) /= '1') then
+ data_out := data_ram_read;
+ else
+ reg_we_v := reg_we_v and ext_anysel;
+ data_out := data_ram_read_ext;
+ end if;
+
+ if wb_reg.byte_en(0) = '0' then
+ data_out(byte_t'range) := (others => '0');
+ end if;
+ if wb_reg.byte_en(1) = '0' then
+ data_out(2*byte_t'length-1 downto byte_t'length) := (others => '0');
+ end if;
+ if wb_reg.byte_en(2) = '0' then
+ data_out(3*byte_t'length-1 downto 2*byte_t'length) := (others => '0');
+ end if;
+ if wb_reg.byte_en(3) = '0' then
+ data_out(4*byte_t'length-1 downto 3*byte_t'length) := (others => '0');
+ end if;
+
+
+-- if wb_reg.hword = '1' or wb_reg.byte_s = '1' then
+-- if wb_reg.address(1)='1' then
+-- data_out(hword_t'range) := data_out(data_out'high downto (data_out'length/2));
+-- end if;
+-- data_out(data_out'high downto (data_out'length/2)) := (others => '0');
+-- if byte_s = '1' then
+-- if wb_reg.address(0) = '1' then
+-- data_out(byte_t'range) := data_out(hword_t'high downto (hword_t'length/2));
+-- end if;
+-- data_out(hword_t'high downto (hword_t'length/2)) := (others => '0');
+-- end if;
+-- end if;
+
+
+ data_out := to_stdlogicvector(to_bitvector(data_out) srl to_integer(unsigned(wb_reg.address(BYTEADDR-1 downto 0)))*byte_t'length);
+
+ if (wb_reg_nxt.address(DATA_ADDR_WIDTH+2) /= '1') then
+ data_addr(DATA_ADDR_WIDTH+1 downto 0) <= wb_reg_nxt.address(DATA_ADDR_WIDTH+1 downto 0);
+ dmem_we <= wb_reg_nxt.dmem_write_en;
+ end if;
+
+ regfile_val <= data_out;
+
+ if wb_reg.dmem_en = '0' then
+ regfile_val <= result;
+ end if;
+
+ reg_we <= reg_we_v;
+
+end process;
+
+
+addr_de_mult: process(wb_reg, wb_reg_nxt, ram_data, sel_nxt, ext_uart_out, ext_gpmp_out, ext_timer_out)
+variable wr_en, enable : std_logic; -- these are all registered
+variable byte_en : byte_en_t; -- if a module needs the nxt signals it has to manually select them
+variable addr : ext_addr_t; -- for example the data memory, because it already has input registers
+variable addrid : std_logic_vector(27 downto 0);--ext_addrid_t;
+variable data : gp_register_t;
+begin
+
+ --if selecting enable is too slow, see alu_b
+ enable := wb_reg.dmem_en;
+ wr_en := wb_reg.dmem_write_en;
+ byte_en := wb_reg.byte_en;
+ addr := wb_reg.address(gp_register_t'high downto BYTEADDR);
+ addrid := wb_reg.address(gp_register_t'high downto EXTWORDS);
+ data := wb_reg.data;
+
+ ext_uart.sel <='0';
+ ext_7seg.sel <='0';
+ ext_timer.sel <='0';
+ ext_gpmp.sel <='0';
+ ext_int.sel <= '0';
+ ext_imp.sel <= '0';
+
+ ext_uart.wr_en <= wr_en;
+ ext_7seg.wr_en <= wr_en;
+ ext_timer.wr_en <= wr_en;
+ ext_gpmp.wr_en <= wr_en;
+ ext_int.wr_en <= wr_en;
+ ext_imp.wr_en <= wr_en;
+
+ ext_uart.byte_en <= byte_en;
+ ext_7seg.byte_en <= byte_en;
+ ext_timer.byte_en <= byte_en;
+ ext_gpmp.byte_en <= byte_en;
+ ext_int.byte_en <= byte_en;
+ ext_imp.byte_en <= byte_en;
+
+ ext_uart.addr <= addr;
+ ext_7seg.addr <= addr;
+ ext_timer.addr <= addr;
+ ext_gpmp.addr <= addr;
+ ext_int.addr <= addr;
+ ext_imp.addr <= addr;
+
+ ext_uart.data <= data;
+ ext_7seg.data <= data;
+ ext_timer.data <= data;
+ ext_gpmp.data <= data;
+ ext_int.data <= data;
+ ext_imp.data <= data;
+
+ -- wenn ich hier statt dem 4rer die konstante nehme dann gibts an fehler wegen nicht lokaler variable -.-
+ case addrid is
+ when EXT_UART_ADDR =>
+ ext_uart.sel <= enable;
+ ext_anysel <= enable;
+
+-- ext_uart.wr_en <= wb_reg_nxt.dmem_write_en;
+-- ext_uart.data <= ram_data;
+-- ext_uart.addr <= wb_reg_nxt.address(31 downto 2);
+-- case wb_reg_nxt.address(1 downto 0) is
+-- when "00" => ext_uart.byte_en <= "0001";
+-- when "01" => ext_uart.byte_en <= "0010";
+-- when "10" => ext_uart.byte_en <= "0100";
+-- --when "11" => ext_uart.byte_en <= "1000";
+-- when "11" => ext_uart.byte_en <= "1111";
+-- when others => null;
+-- end case;
+ when EXT_IMP_ADDR =>
+ ext_imp.sel <= enable;
+ ext_anysel <= enable;
+
+-- ext_uart.wr_en <= wb_reg_nxt.dmem_write_en;
+-- ext_uart.data <= ram_data;
+-- ext_uart.addr <= wb_reg_nxt.address(31 downto 2);
+-- case wb_reg_nxt.address(1 downto 0) is
+-- when "00" => ext_uart.byte_en <= "0001";
+-- when "01" => ext_uart.byte_en <= "0010";
+-- when "10" => ext_uart.byte_en <= "0100";
+-- --when "11" => ext_uart.byte_en <= "1000";
+-- when "11" => ext_uart.byte_en <= "1111";
+-- when others => null;
+-- end case;
+
+ when EXT_INT_ADDR =>
+ ext_int.sel <= enable;
+ ext_anysel <= enable;
+
+-- ext_uart.wr_en <= wb_reg_nxt.dmem_write_en;
+-- ext_uart.data <= ram_data;
+-- ext_uart.addr <= wb_reg_nxt.address(31 downto 2);
+-- case wb_reg_nxt.address(1 downto 0) is
+-- when "00" => ext_uart.byte_en <= "0001";
+-- when "01" => ext_uart.byte_en <= "0010";
+-- when "10" => ext_uart.byte_en <= "0100";
+-- --when "11" => ext_uart.byte_en <= "1000";
+-- when "11" => ext_uart.byte_en <= "1111";
+-- when others => null;
+-- end case;
+
+ when EXT_7SEG_ADDR =>
+ ext_7seg.sel <= enable;
+ ext_anysel <= enable;
+
+ -- ext_7seg.wr_en <= wb_regdmem_write_en;
+ -- ext_7seg.data <= ram_data;
+ -- ext_7seg.addr <= wb_reg_nxt.address(31 downto 2);
+ -- ext_7seg.byte_en(1 downto 0) <= wb_reg_nxt.address(1 downto 0);
+
+
+-- case wb_reg_nxt.address(1 downto 0) is
+-- when "00" => ext_7seg.byte_en <= "0001";
+-- when "01" => ext_7seg.byte_en <= "0010";
+-- when "10" => ext_7seg.byte_en <= "0100";
+-- when "11" => ext_7seg.byte_en <= "1000";
+-- when others => null;
+-- end case;
+
+ when EXT_TIMER_ADDR =>
+ ext_timer.sel <= enable;
+ ext_anysel <= enable;
+ -- ext_timer.wr_en <= wb_reg_nxt.dmem_write_en;
+ -- ext_timer.data <= ram_data;
+ -- ext_timer.addr <= wb_reg_nxt.address(wb_reg_nxt.address'high downto BYTEADDR);
+ -- case wb_reg.address(1 downto 0) is
+ -- when "00" => ext_timer.byte_en <= "0001";
+ -- when "01" => ext_timer.byte_en <= "0010";
+ -- when "10" => ext_timer.byte_en <= "0100";
+ -- when "11" => ext_timer.byte_en <= "1000";
+ -- when others => null;
+ -- end case;
+ when EXT_GPMP_ADDR =>
+ ext_gpmp.sel <= enable;
+ ext_anysel <= enable;
+ -- ext_gpmp.wr_en <= wb_reg_nxt.dmem_write_en;
+ -- ext_gpmp.data <= ram_data;
+ -- ext_gpmp.addr <= wb_reg_nxt.address(wb_reg_nxt.address'high downto BYTEADDR);
+ -- case wb_reg.address(1 downto 0) is
+ -- when "00" => ext_gpmp.byte_en <= "0001";
+ -- when "01" => ext_gpmp.byte_en <= "0010";
+ -- when "10" => ext_gpmp.byte_en <= "0100";
+ -- when "11" => ext_gpmp.byte_en <= "1000";
+ -- when others => null;
+ -- end case;
+ -- hier kann man weiter extensions adden :) Konstanten sind im extension pkg definiert
+ when others => ext_anysel <= '0';
+ end case;
+
+ data_ram_read_ext <= ext_uart_out or ext_gpmp_out or ext_timer_out;