cpu/src/rom_b.vhd

   1 library ieee;
   2
   3 use IEEE.std_logic_1164.all;
   4 use IEEE.numeric_std.all;
   5
   6 use work.mem_pkg.all;
   7
   8 architecture behaviour of rom is
   9
  10         signal vsim_bug : std_logic_vector(31 downto 0);
  11
  12 begin
  13         process(clk)
  14         begin
  15                 if rising_edge(clk) then
  16 --               data_out <= ram(to_integer(UNSIGNED(rd_addr)));
  17
  18
  19         --case rrrr_addr(10 downto 0) is
  20                         case vsim_bug(6 downto 0) is
  21         -- fibonacci
  22 --                              when "00000000000" => data_out <= "11101101000000000000000000000000"; --
  23 --                              when "00000000001" => data_out <= "11101101001000000000000000000000"; --
  24 --                              when "00000000010" => data_out <= "11100111101000000000000000000000"; --
  25 --
  26 --                              when "00000000011" => data_out <= "11100001000000000000000000100001"; --
  27 --                              when "00000000100" => data_out <= "11101100100000000000001100000000"; --
  28 --                              when "00000000101" => data_out <= "00001011011111111111111010000011"; --
  29 --
  30 --                              when "00000000110" => data_out <= "11101101000000000000000000001000"; --
  31 --                              when "00000000111" => data_out <= "11100111100000000000000000001111"; --
  32 --                              when "00000001000" => data_out <= "11100111100000000000000000010011"; -- --
  33 --
  34 --
  35 --                              when "00000001001" => data_out <= x"ed080048"; --x"ed080048"; --
  36 --                              when "00000001010" => data_out <= x"ed500080"; --
  37 --                              when "00000001011" => data_out <= x"fd500002"; --
  38 --                              when "00000001100" => data_out <= x"eb000107";
  39 --                              when "00000001101" => data_out <= "11101011000000000000011010000010"; --"11101011000000000000000000000010";
  40 --
  41 --                              when "00000001110" => data_out <= x"e5088800";
  42 --                              when "00000001111" => data_out <= x"e0150800";
  43 --                              when "00000010000" => data_out <= x"e7010000";
  44 --                              when "00000010001" => data_out <= x"ec800000";
  45 --                              when "00000010010" => data_out <= x"0b000008";
  46 --                              when "00000010011" => data_out <= x"e1910020";
  47 --                              when "00000010100" => data_out <= x"eb7ffe07";
  48 --                              when "00000010101" => data_out <= x"e7197ffc";
  49 --                              when "00000010110" => data_out <= x"e0018000";
  50 --
  51 --                              when "00000010111" => data_out <= x"e1110020";
  52 --                              when "00000011000" => data_out <= x"e7810000";
  53 --                              when "00000011001" => data_out <= x"eb00000a";
  54 --
  55 --
  56 --                              when "00000011010" => data_out <= x"ed290080";
  57 --                              when "00000011011" => data_out <= x"e1080000";
  58 --
  59 --                              when "00000011100" => data_out <= x"e78a8000";
  60 --
  61 --                              when "00000011101" => data_out <= x"ed510058";
  62 --                              when "00000011110" => data_out <= x"e7850000";
  63
  64                         -- uart echo
  65
  66 --1;00000000;ed010058;ldi r0, 0x200B;;
  67 --1;00000004;ed090060;ldi r1, 0x200C;;
  68 --1;00000008;ed110080;ldi r2, 0x2010;;
  69 --1;0000000c;e7188000;ldw r3, 0(r1);;
  70 --1;00000010;ec1a0000;cmp r3, r4;;
  71 --1;00000014;1b7ffd81;breq 0;;
  72 --1;00000018;e7980000;stw r3, 0(r0);;
  73 --1;0000001c;e7990000;stw r3, 0(r2);;
  74 --1;00000020;e1218000;addi r4, r3, 0;;
  75 --1;00000024;eb7ffb81;br 0;;
  76
  77 --                              when "0000000" => data_out <= x"ed010058";
  78 --                              when "0000001" => data_out <= x"ed090060";
  79 --                              when "0000010" => data_out <= x"ed110080"; --x"e7188000";  f
  80 --                              when "0000011" => data_out <= x"e7188000"; --x"ec1a0000";
  81 --                              when "0000100" => data_out <= x"ec1a0000";
  82 --                              when "0000101" => data_out <= x"1b7ffe01";
  83 --                              when "0000110" => data_out <= x"e7990000"; -- f
  84 --                              when "0000111" => data_out <= x"e7980000";
  85 --                              when "0001000" => data_out <= x"e1218000";
  86 --                              when "0001001" => data_out <= x"eb7ffb81";
  87
  88 --1;00000000;ed010058;ldi r0, 0x200B;;;
  89 --1;00000004;ed090060;ldi r1, 0x200C;;;
  90 --1;00000008;ed110080;ldi r2, 0x2010;;;
  91 --1;0000000c;ed390078;ldi r7, 0x200F;;;
  92 --1;00000010;ed480012;ldih r9, 0x0002;;;
  93 --1;00000014;e7438000;ldw r8, 0(r7);;;
  94 --1;00000018;e254c000;and r10, r9, r8;;;
  95 --1;0000001c;07188000;ldwnz r3, 0(r1);;;
  96 --1;00000020;07980000;stwnz r3, 0(r0);;;
  97 --1;00000024;07990000;stwnz r3, 0(r2);;;
  98 --1;00000028;eb7ffb01;br 0;;;
  99
 100 --uart test:
 101
 102 --                              when "0000000" => data_out <= x"ed010058";
 103 --                              when "0000001" => data_out <= x"ed090060";
 104 --                              when "0000010" => data_out <= x"ed110080"; --x"e7188000";  f
 105 --                              when "0000011" => data_out <= x"ed390000"; --x"ec1a0000";
 106 --                              when "0000100" => data_out <= x"ed480012";
 107 --                              when "0000101" => data_out <= x"e7438000";
 108 --                              when "0000110" => data_out <= x"e254c000"; -- f
 109 --                              when "0000111" => data_out <= x"07188000";
 110 --                              when "0001000" => data_out <= x"07980000";
 111 --                              when "0001001" => data_out <= x"07990000";
 112 --                              when "0001010" => data_out <= x"eb7ffb81";
 113
 114 -------------------------------------------
 115
 116 --                              when "00000000000" => data_out <= x"ed000000";
 117 --                              when "00000000001" => data_out <= x"ed080008";
 118 --                              when "00000000010" => data_out <= x"e9880000"; --x"e7188000";  f
 119 --                              when "00000000011" => data_out <= x"e5088400"; --x"ec1a0000";
 120 --                              when "00000000100" => data_out <= x"e9880001";
 121 --                              when "00000000101" => data_out <= x"e7180000";
 122 --                              when "00000000110" => data_out <= x"e9200001"; -- f
 123 --                              when "00000000111" => data_out <= x"e7a00004";
 124 --                              when "00000001000" => data_out <= x"e7280004";
 125 --                      --      when "00000001001" => data_out <= x"eb7ffb81";
 126         when "0000000" => data_out <= x"eb000183"; -- br+ main
 127         when "0000001" => data_out <= x"eb000103"; -- br+ main
 128         when "0000010" => data_out <= x"eb000008"; -- ret
 129         when "0000011" => data_out <= x"ed010000"; -- ldi r0, 0x2000
 130         when "0000100" => data_out <= x"ed090058"; -- ldi r1, 0x200b
 131         when "0000101" => data_out <= x"ed110060"; -- ldi r2, 0x200c
 132         when "0000110" => data_out <= x"e7280000"; -- ldw r5, 0(r0)
 133         when "0000111" => data_out <= x"e2a80010"; -- andx r5, 0x2
 134         when "0001000" => data_out <= x"1b7ffd83"; -- brzs+ main
 135         when "0001001" => data_out <= x"e7390000"; -- ldw r7, 0(r2)
 136         when "0001010" => data_out <= x"e7280000"; -- ldw r5, 0(r0)
 137         when "0001011" => data_out <= x"e2a80008"; -- andx r5, 0x1
 138         when "0001100" => data_out <= x"0b7fff03"; -- brnz+ uartnrdy
 139         when "0001101" => data_out <= x"e7b88000"; -- stw r7, 0(r1)
 140         when "0001110" => data_out <= x"eb7ffa81"; -- br main
 141         -- just nop until rom end!
 142         when others => data_out <= x"fd000000";
 143                         end case;
 144                 end if;
 145         end process;
 146
 147         vsim_bug(6 downto 0) <= rd_addr;
 148         vsim_bug(31 downto 7) <= (others => '0');
 149 end architecture behaviour;