122 lines
4.4 KiB
VHDL
122 lines
4.4 KiB
VHDL
-------------------------------------------------------------------------
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-- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
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-- This file: The ROM file for use in your VHDL design
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--
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-- Copyright (C) 2007 J. Ahrensfeld
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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--
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-- For questions and ideas, please contact the author at jens@jayfield.org
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--
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--------------------------------------------------------------------------
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LIBRARY ieee;
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use IEEE.STD_LOGIC_1164.ALL;
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USE ieee.numeric_std.ALL;
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ENTITY rom IS
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Generic
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(
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addr_width : integer := 2;
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data_width : integer := 32
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);
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Port
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(
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addr : in unsigned(addr_width-1 downto 0);
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dout : out unsigned(data_width-1 downto 0)
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);
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END rom;
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ARCHITECTURE itest OF rom IS
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subtype word_t is unsigned(data_width-1 downto 0);
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type word_array_t is array (0 to 2**addr_width-1) of word_t;
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-- Assembled from itest.jsm
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constant word_array : word_array_t :=
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(
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X"3c011234", -- [0x00400000] lui $1, 4660
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X"34225678", -- [0x00400004] ori $2, $1, 22136
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X"3c012345", -- [0x00400008] lui $1, 9029
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X"34236789", -- [0x0040000c] ori $3, $1, 26505
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X"3c018765", -- [0x00400010] lui $1, -30875
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X"34244321", -- [0x00400014] ori $4, $1, 17185
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X"3c019876", -- [0x00400018] lui $1, -26506
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X"34255432", -- [0x0040001c] ori $5, $1, 21554
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X"00000000", -- [0x00400020] nop
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X"00427823", -- [0x00400024] subu $15, $2, $2
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X"00437823", -- [0x00400028] subu $15, $2, $3
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X"00447823", -- [0x0040002c] subu $15, $2, $4
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X"00457823", -- [0x00400030] subu $15, $2, $5
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X"00627823", -- [0x00400034] subu $15, $3, $2
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X"00637823", -- [0x00400038] subu $15, $3, $3
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X"00647823", -- [0x0040003c] subu $15, $3, $4
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X"00657823", -- [0x00400040] subu $15, $3, $5
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X"00827823", -- [0x00400044] subu $15, $4, $2
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X"00837823", -- [0x00400048] subu $15, $4, $3
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X"00847823", -- [0x0040004c] subu $15, $4, $4
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X"00857823", -- [0x00400050] subu $15, $4, $5
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X"00a27823", -- [0x00400054] subu $15, $5, $2
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X"00a37823", -- [0x00400058] subu $15, $5, $3
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X"00a47823", -- [0x0040005c] subu $15, $5, $4
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X"00a57823", -- [0x00400060] subu $15, $5, $5
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X"00000000", -- [0x00400064] nop
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X"00427822", -- [0x00400068] sub $15, $2, $2
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X"00437822", -- [0x0040006c] sub $15, $2, $3
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X"00447822", -- [0x00400070] sub $15, $2, $4
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X"00457822", -- [0x00400074] sub $15, $2, $5
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X"00627822", -- [0x00400078] sub $15, $3, $2
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X"00637822", -- [0x0040007c] sub $15, $3, $3
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X"00647822", -- [0x00400080] sub $15, $3, $4
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X"00657822", -- [0x00400084] sub $15, $3, $5
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X"00827822", -- [0x00400088] sub $15, $4, $2
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X"00837822", -- [0x0040008c] sub $15, $4, $3
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X"00847822", -- [0x00400090] sub $15, $4, $4
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X"00857822", -- [0x00400094] sub $15, $4, $5
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X"00a27822", -- [0x00400098] sub $15, $5, $2
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X"00a37822", -- [0x0040009c] sub $15, $5, $3
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X"00a47822", -- [0x004000a0] sub $15, $5, $4
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X"00a57822", -- [0x004000a4] sub $15, $5, $5
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X"00000000", -- [0x004000a8] nop
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X"08104000", -- [0x004000ac] j 0x00410000 [main]
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X"00000000", -- [0x004000b0] nop
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X"00000000", -- [0x004000b4]
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X"00000000", -- [0x004000b8]
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X"00000000", -- [0x004000bc]
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X"00000000", -- [0x004000c0]
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X"00000000", -- [0x004000c4]
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X"00000000", -- [0x004000c8]
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X"00000000", -- [0x004000cc]
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X"00000000", -- [0x004000d0]
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X"00000000", -- [0x004000d4]
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X"00000000", -- [0x004000d8]
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X"00000000", -- [0x004000dc]
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X"00000000", -- [0x004000e0]
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X"00000000", -- [0x004000e4]
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X"00000000", -- [0x004000e8]
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X"00000000", -- [0x004000ec]
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X"00000000", -- [0x004000f0]
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X"00000000", -- [0x004000f4]
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X"00000000", -- [0x004000f8]
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X"00000000" -- [0x004000fc]
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);
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begin
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PROM_READ:
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dout <= word_array(to_integer(addr));
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end itest;
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